/* Splitgood - Modern Expense Splitting App Styles */

:root {
    /* Colors - Indigo/Purple Theme */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    --primary-dark: #3730a3;
    
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --background: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

/* Navigation */
.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-xs);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--text);
    background: var(--gray-100);
}

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

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-initials {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.avatar-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

.logout-link {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* Messages */
.messages-container {
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.message {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 500;
}

.message-success {
    background: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.message-error {
    background: var(--danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.message-warning {
    background: var(--warning-light);
    color: #92400e;
    border: 1px solid #fcd34d;
}

.message-info {
    background: var(--primary-light);
    color: var(--primary-dark);
    border: 1px solid #a5b4fc;
}

.message-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.7;
    line-height: 1;
}

.message-close:hover {
    opacity: 1;
}

/* Page Headers */
.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.page-header-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--gray-50);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    color: white;
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
    color: var(--text);
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
    color: white;
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--text);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-icon {
    padding: var(--spacing-sm);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text);
    font-size: 0.875rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9375rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    transition: all var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-hint {
    margin-top: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--danger);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

.form-check-label {
    font-size: 0.9375rem;
    color: var(--text);
    cursor: pointer;
}

/* Participant Checkboxes */
.participant-list {
    display: grid;
    gap: var(--spacing-sm);
}

.participant-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.participant-item:has(input:checked) {
    background: var(--primary-light);
    border-color: var(--primary);
}

.participant-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.participant-info {
    flex: 1;
    min-width: 0;
}

.participant-name {
    font-weight: 500;
    color: var(--text);
}

.participant-amount {
    width: 120px;
}

/* Balance Display */
.balance {
    font-weight: 600;
}

.balance-positive {
    color: var(--success);
}

.balance-negative {
    color: var(--danger);
}

.balance-neutral {
    color: var(--text-muted);
}

.balance-large {
    font-size: 2rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-icon-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-icon-success {
    background: var(--success-light);
    color: var(--success);
}

.stat-icon-warning {
    background: var(--warning-light);
    color: var(--warning);
}

/* Groups Grid */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.group-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.group-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--gray-300);
}

.group-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.group-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

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

.group-name {
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.group-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.group-balance {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.group-balance-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.group-balance-value {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Expense List */
.expense-list {
    display: flex;
    flex-direction: column;
}

.expense-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border);
}

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

.expense-icon {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.expense-details {
    flex: 1;
    min-width: 0;
}

.expense-title {
    font-weight: 500;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.expense-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.expense-amount {
    text-align: right;
}

.expense-total {
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.expense-share {
    font-size: 0.8125rem;
}

/* Activity Feed */
.activity-list {
    display: flex;
    flex-direction: column;
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border);
}

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

.activity-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.875rem;
}

.activity-icon-expense {
    background: var(--primary-light);
    color: var(--primary);
}

.activity-icon-payment {
    background: var(--success-light);
    color: var(--success);
}

.activity-icon-group {
    background: var(--warning-light);
    color: var(--warning);
}

.activity-content {
    flex: 1;
}

.activity-text {
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.activity-text strong {
    font-weight: 600;
}

.activity-time {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Members List */
.members-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.member-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius);
}

.member-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.member-info {
    flex: 1;
}

.member-name {
    font-weight: 500;
    color: var(--text);
}

.member-role {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.member-balance {
    text-align: right;
    font-weight: 600;
}

/* Settlement Suggestions */
.settlement-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.settlement-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.settlement-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}

.settlement-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* Comments */
.comments-section {
    margin-top: var(--spacing-xl);
}

.comment-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.comment-item {
    display: flex;
    gap: var(--spacing-md);
}

.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
    background: var(--gray-50);
    padding: var(--spacing-md);
    border-radius: var(--radius);
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.comment-author {
    font-weight: 600;
    color: var(--text);
    font-size: 0.875rem;
}

.comment-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.comment-text {
    color: var(--text);
    font-size: 0.9375rem;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.empty-icon svg {
    width: 32px;
    height: 32px;
}

.empty-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.empty-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Invite Card */
.invite-card {
    background: var(--primary-light);
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.invite-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.invite-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.invite-info h3 {
    font-weight: 600;
    color: var(--text);
}

.invite-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.invite-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* Tabs */
.tabs {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-lg);
}

.tab {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all var(--transition);
    cursor: pointer;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}

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

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--background) 100%);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
}

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo svg {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.auth-logo p {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-lg) 0;
    gap: var(--spacing-md);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    color: var(--text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-google {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    font-weight: 500;
}

.btn-google:hover {
    background: var(--gray-50);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.auth-alt-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.channel-selector {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.channel-option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    background: var(--surface);
    color: var(--text-secondary);
    font-weight: 500;
}

.channel-option:has(input:checked) {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.channel-option input[type="radio"] {
    display: none;
}

.pending-identity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--warning-light);
    border-radius: var(--radius);
    border: 1px solid #fcd34d;
}

.pending-identity-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.8125rem;
    flex-shrink: 0;
    opacity: 0.7;
}

.pending-identity-info {
    flex: 1;
}

.pending-identity-name {
    font-weight: 500;
    color: var(--text);
}

.pending-identity-contact {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.pending-identity-badge {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--warning);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.phone-input-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: stretch;
}

.phone-input-group .form-select {
    flex: 0 0 auto;
    width: auto;
    min-width: 140px;
}

.phone-input-group .form-input {
    flex: 1;
}

/* Landing Page */
.landing-hero {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--background) 50%, var(--surface) 100%);
}

.hero-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xl);
}

.hero-logo svg {
    width: 48px;
    height: 48px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: var(--spacing-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
}

.hero-feature {
    text-align: center;
    padding: var(--spacing-lg);
}

.hero-feature-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--primary);
}

.hero-feature-icon svg {
    width: 28px;
    height: 28px;
}

.hero-feature h3 {
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.hero-feature p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }

.w-full {
    width: 100%;
}

.hidden {
    display: none !important;
}

.currency-toggle-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.currency-toggle-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--gray-300);
    border-radius: 24px;
    transition: background-color 0.2s;
}

.toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.unified-currency-select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    background: var(--surface);
    color: var(--text);
    min-width: 100px;
}

.fx-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.unified-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--primary-light);
    color: var(--primary-dark);
    margin-left: 6px;
    vertical-align: middle;
}

.balance-label {
    font-size: 0.8125rem;
    margin-top: 2px;
}