/**
 * Itinerary App - Main Stylesheet
 * Mobile-first design with smooth transitions
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Japan inspired palette */
    --color-primary: #e74c3c;
    --color-primary-dark: #c0392b;
    --color-primary-light: #ff6b5b;

    --color-secondary: #3498db;
    --color-secondary-dark: #2980b9;

    --color-success: #2ecc71;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    --color-info: #3498db;

    --color-bg: #f8f9fa;
    --color-bg-card: #ffffff;
    --color-bg-dark: #1a1a2e;

    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-text-muted: #95a5a6;

    --color-border: #e9ecef;
    --color-border-dark: #dee2e6;

    /* Category colors */
    --color-transport: #3498db;
    --color-accommodation: #9b59b6;
    --color-food: #e74c3c;
    --color-activity: #2ecc71;
    --color-shopping: #f39c12;
    --color-sightseeing: #1abc9c;
    --color-logistics: #95a5a6;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Safe areas for mobile */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);

    /* Navigation height */
    --nav-height: 65px;
    --header-height: 56px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100%;
    min-height: 100dvh;
    overflow-x: hidden;
    padding-top: var(--header-height);
    padding-bottom: calc(var(--nav-height) + var(--safe-area-bottom));
}

/* ===== Page Transitions ===== */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
}

.page-loader.active {
    opacity: 1;
    visibility: visible;
}

.loader-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Main content transitions */
/* NOTE: will-change removed - breaks position:fixed on iOS */

/* View Transitions API styles (for modern browsers) */
@supports (view-transition-name: none) {
    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation-duration: 0.2s;
        animation-timing-function: ease-out;
    }

    ::view-transition-old(root) {
        animation-name: fade-and-slide-out;
    }

    ::view-transition-new(root) {
        animation-name: fade-and-slide-in;
    }

    @keyframes fade-and-slide-out {
        from {
            opacity: 1;
            transform: translateY(0);
        }
        to {
            opacity: 0;
            transform: translateY(-10px);
        }
    }

    @keyframes fade-and-slide-in {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Fallback animation for older browsers */
/* NOTE: Using opacity only - transform on body breaks position:fixed on iOS */
.page-transition-in {
    animation: fadeIn 0.25s ease forwards;
}

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

/* ===== Header ===== */
.header-top {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    padding-top: var(--safe-area-top);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

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

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

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

.btn-back {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

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

.exchange-rate {
    font-size: 0.75rem;
    background: var(--color-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.rate-label {
    color: var(--color-text-muted);
}

.rate-value {
    font-weight: 600;
    color: var(--color-primary);
}

/* ===== Bottom Navigation ===== */
.nav-bottom {
    position: fixed !important;
    bottom: 0 !important;
    top: auto !important;
    left: 0 !important;
    right: 0 !important;
    width: 100vw;
    height: calc(var(--nav-height) + var(--safe-area-bottom));
    padding-bottom: var(--safe-area-bottom);
    background: var(--color-bg-card);
    display: flex;
    align-items: center;
    justify-content: space-around;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    z-index: 9999;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 0.625rem;
    font-weight: 500;
    transition: color var(--transition-fast), transform var(--transition-fast);
    position: relative;
    min-width: 60px;
}

.nav-item i {
    font-size: 1.25rem;
    margin-bottom: 2px;
}

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

.nav-item.active i {
    transform: scale(1.1);
}

.nav-item:active {
    transform: scale(0.95);
}

.nav-item .badge {
    position: absolute;
    top: 2px;
    right: 10px;
    background: var(--color-primary);
    color: white;
    font-size: 0.625rem;
    padding: 1px 5px;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
}

/* Add button in nav */
.nav-item-add {
    background: none;
    border: none;
    color: var(--color-primary);
}

.nav-item-add i {
    font-size: 1.5rem;
}

/* Quick Add Modal List */
.quick-add-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.quick-add-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.quick-add-item:active {
    background: var(--color-border);
}

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

.quick-add-item span {
    font-size: 1rem;
    font-weight: 500;
}

/* ===== Main Content ===== */
.main-content {
    min-height: calc(100vh - var(--header-height) - var(--nav-height));
    padding: var(--spacing-md);
}

.main-content.has-nav {
    padding-bottom: calc(var(--nav-height) + var(--safe-area-bottom) + var(--spacing-lg));
}

/* ===== Cards ===== */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-clickable {
    cursor: pointer;
}

.card-clickable:active {
    transform: scale(0.98);
}

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

.card-title {
    font-size: 1rem;
    font-weight: 600;
}

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

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    -webkit-appearance: none;
}

.btn:active {
    transform: scale(0.97);
}

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

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

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border-dark);
    color: var(--color-text);
}

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

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

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

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

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-full);
}

.btn-fab {
    position: fixed;
    bottom: calc(var(--nav-height) + var(--spacing-lg) + var(--safe-area-bottom));
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    z-index: 50;
}

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

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-sm);
    background: var(--color-bg-card);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form-input-lg {
    padding: var(--spacing-md);
    font-size: 1.25rem;
    text-align: center;
    letter-spacing: 0.5em;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-top: var(--spacing-xs);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* ===== PIN Input ===== */
.pin-input-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.pin-digit {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--color-border-dark);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.pin-digit:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.pin-digit.filled {
    border-color: var(--color-primary);
    background: rgba(231, 76, 60, 0.05);
}

/* ===== Flash Messages ===== */
.flash-container {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-md));
    left: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 150;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Desktop - account for sidebar */
@media (min-width: 768px) {
    .flash-container {
        left: calc(240px + var(--spacing-md));
    }
}

.flash {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-lg);
    animation: slideDown var(--transition-normal) ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.flash-success {
    border-left: 4px solid var(--color-success);
}

.flash-success i {
    color: var(--color-success);
}

.flash-error {
    border-left: 4px solid var(--color-danger);
}

.flash-error i {
    color: var(--color-danger);
}

.flash-info {
    border-left: 4px solid var(--color-info);
}

.flash-info i {
    color: var(--color-info);
}

.flash-warning {
    border-left: 4px solid var(--color-warning);
    background: #fef3e2;
}

.flash-warning i {
    color: var(--color-warning);
}

.flash span {
    flex: 1;
    font-size: 0.875rem;
}

.flash-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* ===== Avatars ===== */
.avatar {
    flex-shrink: 0;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-sm {
    width: 32px;
    height: 32px;
}

.avatar-md {
    width: 48px;
    height: 48px;
}

.avatar-lg {
    width: 80px;
    height: 80px;
}

.avatar-xl {
    width: 120px;
    height: 120px;
}

.avatar-group {
    display: flex;
    align-items: center;
}

.avatar-group .avatar {
    margin-left: -8px;
    border: 2px solid var(--color-bg-card);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

.avatar-clickable {
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.avatar-clickable:hover {
    transform: scale(1.05);
}

/* ===== Lightbox ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-image {
    max-width: 95%;
    max-height: 90%;
    object-fit: contain;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.lightbox.active .lightbox-image {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* ===== Activity Categories ===== */
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    color: white;
}

.category-transport { background: var(--color-transport); }
.category-accommodation { background: var(--color-accommodation); }
.category-food { background: var(--color-food); }
.category-activity { background: var(--color-activity); }
.category-shopping { background: var(--color-shopping); }
.category-sightseeing { background: var(--color-sightseeing); }
.category-logistics { background: var(--color-logistics); }

/* ===== Status Badges ===== */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.status-draft {
    background: #f1f2f6;
    color: var(--color-text-muted);
}

.status-polling {
    background: #fff3cd;
    color: #856404;
}

.status-confirmed {
    background: #d4edda;
    color: #155724;
}

.status-completed {
    background: #cce5ff;
    color: #004085;
}

/* Response badges */
.response-pending {
    background: #f1f2f6;
    color: var(--color-text-muted);
}

.response-accepted {
    background: #d4edda;
    color: #155724;
}

.response-declined {
    background: #f8d7da;
    color: #721c24;
}

.response-maybe {
    background: #fff3cd;
    color: #856404;
}

/* ===== List Items ===== */
.list {
    list-style: none;
}

.list-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
}

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

.list-item:active {
    background: var(--color-bg);
}

.list-item-content {
    flex: 1;
    min-width: 0;
}

.list-item-title {
    font-weight: 500;
    margin-bottom: 2px;
}

.list-item-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.list-item-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.list-item-action {
    margin-left: var(--spacing-md);
    color: var(--color-text-muted);
}

/* ===== Timeline ===== */
.timeline {
    position: relative;
    padding-left: var(--spacing-lg);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-lg) + 2px);
    width: 14px;
    height: 14px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    border: 2px solid var(--color-bg-card);
}

.timeline-time {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

/* ===== Day Card ===== */
.day-card {
    margin-bottom: var(--spacing-md);
}

.day-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-sm);
}

.day-number {
    width: 48px;
    height: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.day-number-label {
    font-size: 0.625rem;
    text-transform: uppercase;
    opacity: 0.8;
}

.day-number-value {
    font-size: 1.25rem;
    line-height: 1;
}

.day-info {
    flex: 1;
}

.day-date {
    font-weight: 600;
}

.day-summary {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

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

.empty-state-icon {
    font-size: 3rem;
    color: var(--color-border-dark);
    margin-bottom: var(--spacing-md);
}

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

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

/* ===== Maps ===== */
.map-embed {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.map-embed iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.map-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-secondary);
    font-size: 0.875rem;
    text-decoration: none;
}

.map-link:hover {
    text-decoration: underline;
}

/* ===== Expenses ===== */
.expense-amount {
    font-weight: 600;
}

.expense-amount.anticipated {
    color: var(--color-text-muted);
    font-style: italic;
}

.expense-amount.actual {
    color: var(--color-success);
}

.expense-currency {
    font-size: 0.875em;
    opacity: 0.8;
}

.budget-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.budget-bar-fill {
    height: 100%;
    background: var(--color-success);
    transition: width var(--transition-normal);
}

.budget-bar-fill.warning {
    background: var(--color-warning);
}

.budget-bar-fill.danger {
    background: var(--color-danger);
}

/* ===== Auth Pages ===== */
.auth-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + var(--safe-area-top));
    padding-bottom: calc(var(--spacing-lg) + var(--safe-area-bottom));
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    overflow-y: auto;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

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

.auth-logo i {
    font-size: 3rem;
    color: var(--color-primary);
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.auth-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* PIN Input */
.pin-input-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.pin-digit {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.pin-digit:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.pin-digit:not(:placeholder-shown) {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

/* CAPTCHA styling */
.captcha-group {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.captcha-question {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    color: var(--color-text);
    padding: var(--spacing-md) 0;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.captcha-group .form-input {
    text-align: center;
    font-size: 1.125rem;
}

/* Form input large variant */
.form-input-lg {
    padding: var(--spacing-md);
    font-size: 1.125rem;
    text-align: center;
    letter-spacing: 0.2em;
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.hidden { display: none; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== Accordion ===== */
.accordion {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-item {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}

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

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.accordion-header:hover {
    background: var(--color-bg);
}

.accordion-icon {
    transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.accordion-item.active .accordion-content {
    max-height: 1000px;
}

.accordion-body {
    padding: 0 var(--spacing-md) var(--spacing-md);
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab {
    flex: 1;
    padding: var(--spacing-md);
    text-align: center;
    font-weight: 500;
    color: var(--color-text-muted);
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    white-space: nowrap;
    transition: color var(--transition-fast);
}

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

.tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.tab.active::after {
    transform: scaleX(1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

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

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-height: 90vh;
    max-height: 90dvh;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    display: flex;
    flex-direction: column;
    /* Use opacity instead of transform for iOS compatibility */
    opacity: 0;
    transition: opacity var(--transition-normal);
    /* iOS scroll fix */
    overflow: hidden;
}

.modal-overlay.active .modal {
    opacity: 1;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-card);
    flex-shrink: 0;
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.modal-body {
    padding: var(--spacing-md);
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    flex: 1 1 auto;
    min-height: 0;
}

/* Forms inside modals need flex layout for proper scrolling */
.modal > form {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
    background: var(--color-bg-card);
}

.modal-footer .btn {
    flex: 1;
}

/* ===== Desktop Styles ===== */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }

    .nav-bottom {
        position: fixed;
        top: 0;
        bottom: auto;
        left: 0;
        width: 240px;
        height: 100vh;
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-lg);
        padding-top: calc(var(--spacing-lg) + var(--safe-area-top));
        box-shadow: var(--shadow-md);
    }

    .nav-item {
        width: 100%;
        flex-direction: row;
        justify-content: flex-start;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
        border-radius: var(--radius-sm);
        font-size: 0.875rem;
    }

    .nav-item i {
        margin-bottom: 0;
        font-size: 1rem;
    }

    .nav-item .badge {
        position: absolute;
        top: 50%;
        right: var(--spacing-md);
        transform: translateY(-50%);
        margin-left: 0;
    }

    .nav-item {
        position: relative;
    }

    .header-top {
        left: 240px;
    }

    .main-content {
        margin-left: 240px;
        padding: var(--spacing-lg);
    }

    .main-content.has-nav {
        padding-bottom: var(--spacing-lg);
    }

    .btn-fab {
        bottom: var(--spacing-lg);
    }

    .modal {
        max-width: 500px;
        margin: auto;
        border-radius: var(--radius-lg);
    }

    .modal.modal-lg {
        max-width: 600px;
    }

    .modal-overlay {
        align-items: center;
    }
}

/* ===== Form Row (side-by-side fields) ===== */
.form-row {
    display: flex;
    gap: var(--spacing-md);
}

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

@media (max-width: 480px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* ===== Currency Display ===== */
.currency-converted {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.currency-converted i {
    margin-right: var(--spacing-xs);
}

/* ===== Additional Utilities ===== */
.mx-xs { margin-left: var(--spacing-xs); margin-right: var(--spacing-xs); }
.mx-sm { margin-left: var(--spacing-sm); margin-right: var(--spacing-sm); }
.mt-xs { margin-top: var(--spacing-xs); }
.w-full { width: 100%; }

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

/* ===== Admin View Mode Toggle ===== */
/* Positioned inside header-right div as a flow element */
.admin-view-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 0.7rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    transition: all var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}

.admin-view-toggle i {
    font-size: 0.8rem;
}

.admin-view-toggle.admin-mode {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

.admin-view-toggle.admin-mode:hover {
    background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
}

.admin-view-toggle.participant-mode {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    animation: participant-pulse 2s infinite;
}

.admin-view-toggle.participant-mode:hover {
    background: linear-gradient(135deg, #2980b9 0%, #1f6dad 100%);
}

@keyframes participant-pulse {
    0%, 100% {
        box-shadow: 0 2px 6px rgba(52, 152, 219, 0.4);
    }
    50% {
        box-shadow: 0 2px 12px rgba(52, 152, 219, 0.6);
    }
}

/* Mobile - show icon and short label */
@media (max-width: 767px) {
    .admin-view-toggle {
        padding: 5px 10px;
        font-size: 0.65rem;
    }
}

/* ===== Dark Mode (future) ===== */
@media (prefers-color-scheme: dark) {
    /* Can add dark mode styles here later */
}