/* ==========================================================
   Splitr - Modern Fintech Design System
   Rich Aesthetics, Dark/Light Mode, Responsive Splitwise UI
   ========================================================== */

:root {
    --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Light Theme Palette */
    --bg-app: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-surface-elevated: #FFFFFF;
    --bg-subtle: #F1F5F9;
    --bg-input: #F8FAFC;
    
    --border-color: #E2E8F0;
    --border-subtle: #EDF2F7;
    --border-focus: #10B981;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-inverse: #FFFFFF;
    
    /* Brand & Accent Colors */
    --primary: #10B981;
    --primary-hover: #059669;
    --primary-active: #047857;
    --primary-light: #ECFDF5;
    --primary-glow: rgba(16, 185, 129, 0.18);
    
    --owed-color: #10B981;       /* You are owed (Green) */
    --owed-bg: #ECFDF5;
    --owe-color: #EF4444;        /* You owe (Red/Coral) */
    --owe-bg: #FEF2F2;
    --settled-color: #64748B;    /* Settled up (Slate) */
    --settled-bg: #F1F5F9;
    
    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --info: #3B82F6;
    --info-bg: #EFF6FF;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-app: #0B0F17;
    --bg-surface: #111827;
    --bg-surface-elevated: #1F2937;
    --bg-subtle: #1E293B;
    --bg-input: #1F2937;
    
    --border-color: #2D3748;
    --border-subtle: #1F2937;
    --border-focus: #10B981;
    
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #64748B;
    --text-inverse: #0F172A;
    
    --primary: #10B981;
    --primary-hover: #34D399;
    --primary-light: rgba(16, 185, 129, 0.15);
    --primary-glow: rgba(16, 185, 129, 0.25);
    
    --owed-color: #34D399;
    --owed-bg: rgba(16, 185, 129, 0.15);
    --owe-color: #F87171;
    --owe-bg: rgba(239, 68, 68, 0.15);
    --settled-color: #94A3B8;
    --settled-bg: #1E293B;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-app);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
}

a {
    color: inherit;
    text-decoration: none;
}

button, input, select, textarea {
    font-family: inherit;
}

/* Layout Grid */
.app-container {
    display: flex;
    min-height: 100vh;
    max-width: 100%;
    overflow-x: hidden;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.brand-badge {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #10B981 0%, #047857 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    padding: 0 12px 8px 12px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--primary-light);
    color: var(--primary);
}

.nav-link.active svg {
    stroke: var(--primary);
}

.sidebar-sub-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: background-color var(--transition-fast);
}

.sidebar-sub-item:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 60;
    animation: fadeIn 0.2s ease;
}

.sidebar-backdrop.active {
    display: block;
}

.user-snippet {
    display: flex;
    align-items: center;
    gap: 10px;
    overflow: hidden;
}

.avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.user-name-snippet {
    font-size: 0.88rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content Area */
.main-wrapper {
    flex: 1 1 0%;
    min-width: 0;
    max-width: 100%;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Top Navigation Bar */
.topbar {
    height: 70px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 30;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    flex: 1;
}

.page-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.84rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 2px 8px var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-secondary {
    background-color: var(--bg-surface);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-subtle);
}

.btn-danger {
    background-color: var(--owe-color);
    color: white;
}

.btn-danger:hover {
    background-color: #DC2626;
}

.btn-outline-danger {
    background-color: transparent;
    border-color: var(--owe-color);
    color: var(--owe-color);
}

.btn-outline-danger:hover {
    background-color: var(--owe-bg);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

.btn-block {
    width: 100%;
}

/* Main Content Page Container */
.page-container {
    padding: 32px;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    flex: 1;
}

/* Dashboard Balance Cards */
.balance-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.balance-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.balance-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.balance-card.card-net::before {
    background: linear-gradient(to bottom, #10B981, #6366F1);
}

.balance-card.card-owed::before {
    background-color: var(--owed-color);
}

.balance-card.card-owe::before {
    background-color: var(--owe-color);
}

.balance-card-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.balance-card-amount {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.text-owed {
    color: var(--owed-color) !important;
}

.text-owe {
    color: var(--owe-color) !important;
}

.text-settled {
    color: var(--settled-color) !important;
}

/* Quick Action Banner */
.action-banner {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(99, 102, 241, 0.08) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.banner-text h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.banner-text p {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.banner-buttons {
    display: flex;
    gap: 12px;
}

/* Two-Column Dashboard Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
}

/* Sections & Cards */
.panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.panel-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.panel-body {
    padding: 20px 24px;
}

/* Expense List */
.expense-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.expense-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color var(--transition-fast);
    cursor: pointer;
    gap: 12px;
}

.expense-item:last-child {
    border-bottom: none;
}

.expense-item:hover {
    background-color: var(--bg-subtle);
}

.expense-item-left {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
    flex: 1;
}

.expense-date-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 48px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    flex-shrink: 0;
}

.expense-date-box .day {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.expense-category-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.expense-title-group {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

.expense-title {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-item-right {
    text-align: right;
    flex-shrink: 0;
}

.expense-amount-label {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.expense-amount-val {
    font-size: 1.05rem;
    font-weight: 800;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
}

.badge-owed {
    background-color: var(--owed-bg);
    color: var(--owed-color);
}

.badge-owe {
    background-color: var(--owe-bg);
    color: var(--owe-color);
}

.badge-settled {
    background-color: var(--settled-bg);
    color: var(--settled-color);
}

/* Modals */
html.modal-open, body.modal-open {
    overflow: hidden !important;
    height: 100% !important;
    touch-action: none;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000; /* Above bottom navigation (z-index 90) and banners */
    padding: 16px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    animation: fadeIn 0.2s ease;
}

.modal-backdrop.active {
    display: flex;
    touch-action: pan-y;
}

.modal-dialog {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    max-height: 90dvh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    position: relative;
    overscroll-behavior: contain;
    touch-action: pan-y;
    animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    margin: auto;
}

/* Ensure forms inside modals flex properly so modal-body can scroll and footer stays visible */
.modal-dialog form {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    background-color: var(--bg-surface);
    z-index: 2;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 800;
}

.modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    background-color: var(--bg-app);
    flex-shrink: 0;
    z-index: 2;
}

/* Split Strategy Tabs & Dynamic Participants */
.split-strategy-tabs {
    display: flex;
    gap: 6px;
    background: var(--bg-subtle);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
}

.split-tab-btn {
    flex: 1;
    padding: 8px 10px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.split-tab-btn:hover {
    color: var(--text-primary);
}

.split-tab-btn.active {
    background: var(--bg-surface);
    color: var(--primary);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.split-tab-content {
    display: none !important;
}

.split-tab-content.active {
    display: block !important;
}

.split-participants-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 220px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding-right: 4px;
}

.split-participant-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.participant-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.split-input-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 110px;
}


/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row .form-group {
    flex: 1;
}

/* Split Method Tabs */
.split-tabs {
    display: flex;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
}

.split-tab-btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.split-tab-btn.active {
    background-color: var(--bg-surface);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* Split Participant Rows */
.split-participant-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
    max-height: 220px;
    overflow-y: auto;
    padding-right: 4px;
}

.split-participant-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-md);
    gap: 12px;
}

.participant-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
}

.split-input-wrap {
    width: 120px;
    display: flex;
    align-items: center;
    position: relative;
}

.split-input-wrap input {
    text-align: right;
    padding-right: 24px;
}

.split-input-wrap .unit {
    position: absolute;
    right: 8px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Debt Simplification Visual Box */
.debt-simplify-box {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%);
    border: 1px dashed var(--primary);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-top: 20px;
}

.settlement-tx-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-top: 10px;
}

.settlement-arrow {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 700;
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    z-index: 50;
    align-items: center;
    justify-content: space-around;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
}

.mobile-nav-item.active {
    color: var(--primary);
}

/* Installer & Auth Pages */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
    background: radial-gradient(circle at top, rgba(16, 185, 129, 0.12) 0%, var(--bg-app) 70%);
}

.auth-card, .installer-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 460px;
    padding: 40px;
    box-shadow: var(--shadow-xl);
}

.installer-card {
    max-width: 580px;
}

.brand-header {
    margin-bottom: 28px;
}

.brand-header .brand-logo-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #10B981 0%, #047857 100%);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 8px 20px var(--primary-glow);
    margin-bottom: 16px;
}

.brand-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand-header .subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.demo-credentials-box {
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-top: 16px;
    font-size: 0.88rem;
}

.demo-credentials-box .credential-item {
    margin-top: 6px;
}

.env-check-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.env-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.alert-danger {
    background-color: var(--owe-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--owe-color);
}

.alert-success {
    background-color: var(--owed-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--owed-color);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(35px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(35px) scale(0.96);
    }
}

/* PWA Install Notification Banner (Bottom Floating) */
.pwa-install-banner {
    position: fixed;
    bottom: 24px;
    left: 20px;
    right: 20px;
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--bg-surface);
    border: 1px solid var(--primary);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22), 0 0 0 1px var(--primary-glow);
    border-radius: var(--radius-xl);
    padding: 16px 20px;
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    z-index: 95;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.pwa-banner-content {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.pwa-badge-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #10B981, #047857);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.pwa-banner-text {
    min-width: 0;
}

.pwa-banner-title {
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pwa-banner-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.3;
    margin-top: 2px;
}

.pwa-banner-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
        max-width: 100%;
        position: relative;
    }
    .app-container {
        overflow-x: hidden;
        max-width: 100%;
    }
    .sidebar {
        transform: translateX(-100%);
        z-index: 70; /* Position above mobile bottom nav (50) and topbar (30) */
        box-shadow: 0 0 35px rgba(0, 0, 0, 0.45);
        max-width: 85vw;
        height: 100%;
        height: 100dvh;
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .sidebar-footer {
        padding: 16px 18px;
        padding-bottom: max(20px, env(safe-area-inset-bottom, 20px));
        background-color: var(--bg-surface);
        border-top: 1px solid var(--border-subtle);
        position: sticky;
        bottom: 0;
        z-index: 75;
    }
    .sidebar-footer .btn-icon {
        width: 38px;
        height: 38px;
        background-color: var(--bg-subtle);
        color: var(--owe-color);
        border: 1px solid var(--border-color);
    }
    .main-wrapper {
        margin-left: 0;
        padding-bottom: 70px;
        min-width: 0;
        max-width: 100%;
        overflow-x: hidden;
    }
    .topbar {
        padding: 0 14px;
        height: 62px;
        gap: 8px;
        max-width: 100%;
        box-sizing: border-box;
    }
    .topbar-left {
        gap: 10px;
        min-width: 0;
        flex: 1;
    }
    .page-title {
        font-size: 1.15rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .topbar-actions {
        gap: 6px;
        flex-shrink: 0;
    }
    .nav-btn-label {
        display: none;
    }
    .topbar-actions .btn-sm {
        padding: 7px 10px;
        min-width: 36px;
        height: 36px;
    }
    .topbar-actions .btn-icon {
        width: 36px;
        height: 36px;
    }
    .page-container {
        padding: 16px 12px;
        max-width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
    }
    /* Mobile Summary Balance Cards (Clean 2-Column Side-by-Side) */
    .balance-cards-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin-bottom: 16px;
        max-width: 100%;
        box-sizing: border-box;
    }
    .balance-card.card-net {
        display: none; /* Hide total balance on mobile */
    }
    .balance-card {
        padding: 12px 12px;
        border-radius: var(--radius-md);
        gap: 2px;
        min-width: 0;
    }
    .balance-card::before {
        width: 3px;
    }
    .balance-card-label {
        font-size: 0.70rem;
        letter-spacing: 0.02em;
    }
    .balance-card-amount {
        font-size: clamp(1.10rem, 4.2vw, 1.35rem);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .balance-card-sub {
        display: none; /* Hide verbose subtitle text on mobile */
    }

    /* Quick Action Banner Responsive */
    .action-banner {
        padding: 16px 14px;
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        margin-bottom: 18px;
        max-width: 100%;
        box-sizing: border-box;
    }
    .banner-text h2 {
        font-size: 1.15rem;
    }
    .banner-text p {
        font-size: 0.85rem;
    }
    .banner-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        width: 100%;
    }
    .banner-buttons .btn {
        flex: 1 1 calc(50% - 4px);
        min-width: 0;
        justify-content: center;
        padding: 9px 10px;
        font-size: 0.82rem;
        white-space: nowrap;
    }
    .banner-buttons .btn:first-child {
        flex: 1 1 100%;
    }

    /* Panels & Expense Items */
    .panel {
        max-width: 100%;
        box-sizing: border-box;
        overflow: hidden;
    }
    .panel-header {
        padding: 14px 14px;
        gap: 8px;
    }
    .panel-header .panel-title {
        font-size: 0.98rem;
        min-width: 0;
    }
    .panel-header .btn-sm {
        padding: 6px 10px;
        font-size: 0.78rem;
        flex-shrink: 0;
    }
    .expense-item {
        padding: 12px 10px;
        gap: 8px;
        max-width: 100%;
        box-sizing: border-box;
    }
    .expense-item-left {
        gap: 10px;
        min-width: 0;
        flex: 1;
    }
    .expense-date-box {
        width: 36px;
        height: 40px;
        font-size: 0.65rem;
        flex-shrink: 0;
    }
    .expense-date-box .day {
        font-size: 0.95rem;
    }
    .expense-category-icon {
        width: 32px;
        height: 32px;
        flex-shrink: 0;
    }
    .expense-title {
        font-size: 0.88rem;
    }
    .expense-subtitle {
        font-size: 0.72rem;
    }
    .expense-amount-val {
        font-size: 0.92rem;
    }
    .expense-amount-label {
        font-size: 0.70rem;
    }

    .mobile-bottom-nav {
        display: flex;
    }
    .pwa-install-banner {
        bottom: 74px; /* Float above mobile bottom navigation bar */
        left: 12px;
        right: 12px;
        padding: 12px 14px;
        border-radius: var(--radius-lg);
    }
    .auth-card, .installer-card {
        padding: 24px 20px;
    }

    /* Responsive Modals on Mobile */
    .modal-backdrop {
        padding: 12px 8px;
        align-items: center;
    }
    .modal-dialog {
        max-height: 92vh;
        max-height: 92dvh;
        border-radius: var(--radius-lg);
    }
    .modal-header {
        padding: 14px 16px;
    }
    .modal-title {
        font-size: 1.1rem;
    }
    .modal-body {
        padding: 16px 14px;
        gap: 14px;
    }
    .modal-footer {
        padding: 12px 14px;
    }
    .split-participants-list {
        max-height: 180px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.05rem;
    }
    .topbar {
        padding: 0 10px;
    }
    .balance-cards-grid {
        gap: 8px;
    }
    .balance-card {
        padding: 12px 10px;
    }
}

/* ==========================================================
   Splitwise Mobile-Inspired Groups & Friends UI
   ========================================================== */

/* Splitwise List Container */
.splitwise-card-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Group Item Card matching Image 1 */
.splitwise-group-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.splitwise-group-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.splitwise-group-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    flex: 1;
}

/* Category icon box with vibrant gradients */
.group-category-icon-box {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.group-category-icon-box svg {
    width: 28px;
    height: 28px;
    stroke: currentColor;
}

/* Category Gradient Variations */
.cat-gradient-trip {
    background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
}
.cat-gradient-home {
    background: linear-gradient(135deg, #0f4c81 0%, #1e3a8a 100%);
}
.cat-gradient-couple {
    background: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
}
.cat-gradient-event {
    background: linear-gradient(135deg, #ea580c 0%, #f97316 100%);
}
.cat-gradient-project {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
}
.cat-gradient-other {
    background: linear-gradient(135deg, #9f1239 0%, #881337 100%);
}
.cat-gradient-nongroup {
    background: linear-gradient(135deg, #059669 0%, #0284c7 50%, #d97706 100%);
}

.splitwise-group-content {
    min-width: 0;
    flex: 1;
}

.splitwise-group-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.splitwise-group-status {
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.splitwise-group-subtext {
    font-size: 0.82rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Overall Balance Summary Header */
.splitwise-overall-banner {
    padding: 16px 20px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.splitwise-overall-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
}

/* Settled Toggle Pill */
.settled-toggle-wrapper {
    text-align: center;
    padding: 24px 0 16px;
}

.btn-pill {
    border-radius: 9999px;
    padding: 8px 24px;
    font-size: 0.88rem;
    font-weight: 600;
    border: 1px solid var(--primary);
    color: var(--primary);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-pill:hover {
    background: var(--primary);
    color: #ffffff;
}

/* Friends View Tree Breakdown matching Image 2 */
.friend-card-row {
    padding: 14px 16px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.friend-card-row:hover {
    box-shadow: var(--shadow-sm);
}

.friend-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-decoration: none;
    color: inherit;
}

.friend-card-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.friend-card-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.friend-card-balance {
    text-align: right;
}

.friend-card-balance .sub-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: lowercase;
}

.friend-card-balance .amount {
    font-size: 1.05rem;
    font-weight: 800;
}

.friend-sub-tree {
    padding-left: 48px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.tree-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.tree-branch {
    color: var(--border-color);
    font-weight: bold;
    font-family: monospace;
}

/* Friend Detail Page matching Image 3 */
.friend-profile-banner {
    position: relative;
    padding: 24px 20px 20px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.25) 100%);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.friend-profile-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.friend-profile-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.friend-profile-summary {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.friend-group-breakdown-box {
    border-left: 3px solid var(--primary);
    padding-left: 14px;
    margin: 12px 0 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.friend-action-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.friend-pill-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.friend-pill-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Shared Group Card matching Image 3 */
.shared-group-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
}

.shared-group-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.shared-group-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.shared-group-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
}

/* ==========================================================
   Global Movable Floating Action Button (FAB)
   ========================================================== */
.fab-movable-wrapper {
    position: fixed;
    bottom: 84px;
    right: 20px;
    z-index: 999;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
    cursor: grab;
    transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
}

.fab-movable-wrapper.is-dragging {
    cursor: grabbing !important;
    transition: none !important;
    opacity: 0.92;
    transform: scale(1.06) !important;
}

.fab-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, #059669 100%);
    color: #ffffff;
    border: none;
    border-radius: 9999px;
    padding: 12px 22px;
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45), 0 2px 6px rgba(0, 0, 0, 0.12);
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    white-space: nowrap;
    outline: none;
    transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.fab-movable-wrapper.is-dragging .fab-btn {
    cursor: grabbing !important;
    box-shadow: 0 10px 28px rgba(16, 185, 129, 0.6), 0 4px 10px rgba(0, 0, 0, 0.2) !important;
}

.fab-btn:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #047857 100%);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.55), 0 3px 8px rgba(0, 0, 0, 0.18);
    transform: translateY(-2px);
}

.fab-btn:active {
    transform: translateY(0) scale(0.97);
}

.fab-icon {
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.fab-btn:hover .fab-icon {
    transform: rotate(90deg);
}

@media (min-width: 769px) {
    .fab-movable-wrapper {
        bottom: 30px;
        right: 32px;
    }
}

@media (max-width: 480px) {
    .fab-btn {
        padding: 11px 18px;
        font-size: 0.88rem;
    }
}

/* ==========================================================
   Toast Notification System
   ========================================================== */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    max-width: 90vw;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    font-size: 0.92rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(-12px) scale(0.96);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: auto;
}

.toast.toast-show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.toast-success {
    border-left: 4px solid var(--primary);
}

.toast-success .toast-icon {
    color: var(--primary);
    font-weight: 800;
}

.toast-error .toast-icon {
    color: var(--danger);
    font-weight: 800;
}

/* ==========================================================
   Splitr Public Landing Page Styles
   ========================================================== */
.landing-body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow-x: hidden;
}

.landing-container {
    width: 100%;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Landing Navigation */
.landing-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background-color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal);
}

[data-theme="dark"] .landing-header {
    background-color: rgba(11, 15, 23, 0.85);
}

.landing-nav-container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.landing-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.landing-brand-text {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.landing-nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.landing-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.92rem;
    transition: color var(--transition-fast);
}

.landing-nav-link:hover {
    color: var(--primary);
}

.landing-nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.landing-login-btn,
.landing-cta-btn {
    white-space: nowrap !important;
    flex-shrink: 0;
}

.cta-text-short {
    display: none;
}

/* Hero Section */
.landing-hero-section {
    padding: 80px 0 60px;
    position: relative;
    background: radial-gradient(circle at 50% 20%, var(--primary-glow) 0%, transparent 60%);
}

.landing-hero-section .landing-container {
    display: grid;
    grid-template-columns: 1.15fr 0.95fr;
    gap: 48px;
    align-items: center;
}

.landing-hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.landing-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 20px;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.pill-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    box-shadow: 0 0 8px var(--primary);
}

.landing-hero-title {
    font-size: 2.85rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), #059669);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.landing-hero-subtitle {
    font-size: 1.12rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 520px;
}

.landing-hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.landing-hero-primary-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 1.05rem;
    box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.4);
}

.landing-hero-secondary-btn {
    padding: 14px 24px;
    font-size: 1.05rem;
}

.landing-trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.trust-badge-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.trust-badge-item .badge-icon {
    color: var(--primary);
    font-weight: 800;
}

/* Hero App Preview Mockup */
.landing-hero-mockup-wrap {
    perspective: 1000px;
    width: 100%;
    max-width: 100%;
}

.landing-preview-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), 0 0 0 1px var(--border-subtle);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    transform: rotateY(-3deg) rotateX(2deg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.landing-preview-card * {
    box-sizing: border-box;
}

.landing-preview-card:hover {
    transform: rotateY(0deg) rotateX(0deg) translateY(-4px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.18);
}

.preview-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 14px;
}

.preview-group-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.preview-group-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--bg-subtle);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.preview-group-name {
    font-size: 1.05rem;
    font-weight: 800;
    word-break: break-word;
}

.preview-group-members {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.preview-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--primary-light);
    color: var(--primary);
}

.preview-balance-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.preview-stat-card {
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.preview-stat-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.preview-stat-val {
    font-size: 1.25rem;
    font-weight: 800;
}

.preview-debt-box {
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.preview-debt-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.preview-debt-transfers {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preview-transfer-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.86rem;
    background: var(--bg-surface);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.preview-transfer-item .debtor, .preview-transfer-item .creditor {
    font-weight: 700;
}

.preview-transfer-item .transfer-arrow {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.preview-transfer-item .transfer-amount {
    font-weight: 800;
    color: var(--primary);
}

.preview-recent-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-top: 1px solid var(--border-color);
}

.preview-item-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: white;
    font-weight: 800;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.preview-item-desc {
    flex: 1;
    min-width: 0;
}

.preview-item-title {
    font-size: 0.88rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-item-sub {
    font-size: 0.76rem;
    color: var(--text-muted);
}

.preview-item-amount {
    font-size: 0.82rem;
    font-weight: 700;
    text-align: right;
    white-space: nowrap;
}

/* Shared Section Styling */
.landing-section {
    padding: 88px 0;
}

.landing-section-alt {
    background-color: var(--bg-subtle);
}

.section-header {
    margin-bottom: 56px;
}

.section-header.text-center {
    text-align: center;
}

.section-badge {
    display: inline-block;
    color: var(--primary);
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Features Grid */
.landing-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.landing-feature-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.landing-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon-box {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon-box.icon-green { background: rgba(16, 185, 129, 0.14); color: #10B981; }
.feature-icon-box.icon-emerald { background: rgba(5, 150, 105, 0.14); color: #059669; }
.feature-icon-box.icon-blue { background: rgba(59, 130, 246, 0.14); color: #3B82F6; }
.feature-icon-box.icon-purple { background: rgba(139, 92, 246, 0.14); color: #8B5CF6; }
.feature-icon-box.icon-amber { background: rgba(245, 158, 11, 0.14); color: #F59E0B; }
.feature-icon-box.icon-teal { background: rgba(20, 184, 166, 0.14); color: #14B8A6; }

.feature-card-title {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.feature-card-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* Steps Grid */
.landing-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.landing-step-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px 30px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.step-badge {
    position: absolute;
    top: 24px;
    right: 28px;
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--text-muted);
    opacity: 0.25;
}

.step-icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.6;
}

/* Debt Comparison Box */
.landing-split-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.debt-comparison-box {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    box-shadow: var(--shadow-lg);
}

.debt-comparison-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comp-header {
    font-weight: 800;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.comp-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.comp-item {
    font-size: 0.82rem;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    background: var(--bg-subtle);
    color: var(--text-secondary);
}

.comp-item.highlight {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.comp-footer {
    font-size: 0.85rem;
    font-weight: 800;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.debt-comparison-divider {
    font-size: 1.6rem;
    color: var(--primary);
    font-weight: 800;
}

/* FAQ Accordion */
.landing-faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-item[open] {
    border-color: var(--primary);
}

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-icon {
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.faq-item[open] .faq-icon {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    padding: 0 24px 22px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* CTA Banner */
.landing-cta-section {
    padding: 60px 0 80px;
}

.landing-cta-banner {
    background: linear-gradient(135deg, #10B981 0%, #047857 100%);
    color: white;
    border-radius: var(--radius-xl);
    padding: 64px 36px;
    text-align: center;
    box-shadow: 0 20px 40px -10px rgba(16, 185, 129, 0.4);
}

.cta-banner-title {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}

.cta-banner-subtitle {
    font-size: 1.15rem;
    opacity: 0.92;
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.cta-banner-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.landing-cta-banner .btn-primary {
    background: white;
    color: #047857;
    font-weight: 800;
}

.landing-cta-banner .btn-primary:hover {
    background: #F1F5F9;
}

.landing-cta-banner .btn-secondary {
    background: rgba(255, 255, 255, 0.18);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.landing-cta-banner .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.28);
}

/* Landing Footer */
.landing-footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 32px;
}

.landing-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-col-title {
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.footer-links-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links-col a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    transition: color var(--transition-fast);
}

.footer-links-col a:hover {
    color: var(--primary);
}

.landing-footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}

/* Responsive Styles for Landing Page */
@media (max-width: 992px) {
    .landing-hero-section .landing-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .landing-hero-content {
        text-align: center;
        align-items: center;
    }
    
    .landing-hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .landing-trust-badges {
        justify-content: center;
    }
    
    .landing-hero-actions {
        justify-content: center;
    }

    .landing-hero-mockup-wrap {
        perspective: none !important;
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden;
    }

    .landing-preview-card {
        transform: none !important;
    }

    .landing-preview-card:hover {
        transform: none !important;
    }
    
    .landing-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .landing-steps-grid {
        grid-template-columns: 1fr;
    }
    
    .landing-split-feature {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    
    .landing-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .landing-container {
        padding: 0 16px !important;
    }

    .landing-nav-container {
        padding: 10px 14px !important;
        gap: 8px !important;
    }

    .landing-brand {
        gap: 8px;
        min-width: 0;
    }

    .landing-brand-text {
        font-size: 1.18rem;
    }

    .landing-brand .brand-logo-icon {
        width: 32px;
        height: 32px;
    }

    .landing-brand .brand-logo-icon svg {
        width: 18px;
        height: 18px;
    }

    .landing-nav-actions {
        gap: 6px !important;
        flex-shrink: 0;
    }

    .landing-nav-actions .btn-icon {
        width: 34px !important;
        height: 34px !important;
        flex-shrink: 0;
    }

    .landing-login-btn {
        padding: 6px 10px !important;
        font-size: 0.8rem !important;
        line-height: 1.2;
    }

    .landing-cta-btn {
        padding: 6px 11px !important;
        font-size: 0.8rem !important;
        line-height: 1.2;
    }

    .landing-nav-links {
        display: none;
    }
    
    .landing-hero-title {
        font-size: 2.15rem;
    }

    .landing-preview-card {
        padding: 16px 14px !important;
        border-radius: var(--radius-lg) !important;
        gap: 14px;
    }

    .preview-card-header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .preview-group-name {
        font-size: 0.98rem;
    }

    .preview-group-members {
        font-size: 0.76rem;
    }

    .preview-balance-row {
        gap: 8px;
    }

    .preview-stat-card {
        padding: 10px 12px;
    }

    .preview-stat-val {
        font-size: 1.15rem;
    }

    .preview-debt-box {
        padding: 12px 10px;
    }

    .preview-debt-title {
        font-size: 0.8rem;
        line-height: 1.35;
    }

    .preview-transfer-item {
        flex-wrap: wrap;
        gap: 4px 8px;
        padding: 8px 10px;
        font-size: 0.82rem;
    }

    .preview-item {
        gap: 10px;
    }

    .preview-item-title {
        font-size: 0.84rem;
    }

    .preview-item-sub {
        font-size: 0.74rem;
    }

    .preview-item-amount {
        font-size: 0.78rem;
    }
    
    .landing-features-grid {
        grid-template-columns: 1fr;
    }
    
    .debt-comparison-box {
        flex-direction: column;
    }
    
    .debt-comparison-divider {
        transform: rotate(90deg);
    }

    .landing-cta-banner {
        padding: 40px 18px !important;
    }
    
    .cta-banner-title {
        font-size: 1.8rem;
    }
    
    .landing-footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 380px) {
    .landing-nav-container {
        padding: 8px 10px !important;
        gap: 6px !important;
    }

    .landing-brand-text {
        font-size: 1.05rem;
    }

    .landing-nav-actions {
        gap: 4px !important;
    }

    .landing-login-btn {
        padding: 5px 8px !important;
        font-size: 0.76rem !important;
    }

    .landing-cta-btn {
        padding: 5px 9px !important;
        font-size: 0.76rem !important;
    }

    .cta-text-full {
        display: none !important;
    }

    .cta-text-short {
        display: inline !important;
    }

    .preview-balance-row {
        grid-template-columns: 1fr;
    }

    .preview-group-icon {
        width: 38px;
        height: 38px;
        font-size: 1.2rem;
    }

    .landing-hero-title {
        font-size: 1.9rem;
    }
}