/* TripAI Design System - Vibrant Travel Theme */

:root {
    /* Primary Colors - Sunset/Travel inspired */
    --color-primary: #FF6B6B;
    /* Coral Red */
    --color-primary-dark: #EE5A5A;
    --color-secondary: #4ECDC4;
    /* Teal */
    --color-accent: #FFE66D;
    /* Sunny Yellow */

    /* Gradients */
    --gradient-sunset: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 50%, #FFE66D 100%);
    --gradient-ocean: linear-gradient(135deg, #667eea 0%, #4ECDC4 100%);
    --gradient-tropical: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Background Colors */
    --bg-light: #FAFBFC;
    --bg-card: #FFFFFF;
    --bg-dark: #1A1A2E;
    --bg-dark-card: #252542;

    /* Text Colors */
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --text-light: #FFFFFF;
    --text-muted: #A0AEC0;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-primary: 0 8px 30px rgba(255, 107, 107, 0.3);
    --shadow-secondary: 0 8px 30px rgba(78, 205, 196, 0.3);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    /* Dark mode specific variables */
    --border-color: rgba(0, 0, 0, 0.08);
    --bg-surface: #f8f9fa;
    --bg-surface-hover: rgba(0, 0, 0, 0.04);
}

/* =========================================
   DARK MODE
   ========================================= */

[data-theme="dark"] {
    --bg-light: #0f172a;
    --bg-card: #1e293b;
    --bg-dark-card: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --bg-surface: #334155;
    --bg-surface-hover: rgba(255, 255, 255, 0.06);
}

/* Header */
[data-theme="dark"] .app-header {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-color);
}

/* Dropdown */
[data-theme="dark"] .user-dropdown {
    background: #1e293b;
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .user-dropdown a:hover,
[data-theme="dark"] .user-dropdown button:hover {
    background: var(--bg-surface-hover);
}

[data-theme="dark"] .user-dropdown .divider {
    background: var(--border-color);
}

/* Cards */
[data-theme="dark"] .card {
    background: var(--bg-card);
}

[data-theme="dark"] .feature-card {
    background: var(--bg-card);
}

[data-theme="dark"] .place-card {
    background: var(--bg-card);
}

[data-theme="dark"] .place-card.selected {
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.1) 0%, rgba(78, 205, 196, 0.2) 100%);
}

/* Inputs */
[data-theme="dark"] .input {
    background: var(--bg-surface);
    border-color: var(--border-color);
    color: var(--text-primary);
}

/* Spinner */
[data-theme="dark"] .spinner {
    border-color: var(--border-color);
    border-top-color: var(--color-primary);
}

/* Skeleton dark mode */
[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #334155 25%, #475569 50%, #334155 75%);
    background-size: 200% 100%;
}

[data-theme="dark"] .skeleton-place-card {
    background: var(--bg-card);
}

[data-theme="dark"] .skeleton-activity {
    background: var(--bg-surface);
}

/* Dark mode toggle button (shared) */
.dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dark-mode-toggle:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

[data-theme="dark"] .dark-mode-toggle {
    color: #fbbf24;
}

[data-theme="dark"] .dark-mode-toggle:hover {
    background: rgba(251, 191, 36, 0.1);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Utility Classes */
.gradient-text {
    background: var(--gradient-sunset);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-bg-sunset {
    background: var(--gradient-sunset);
}

.gradient-bg-ocean {
    background: var(--gradient-ocean);
}

.gradient-bg-hero {
    background: var(--gradient-hero);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-sunset);
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: var(--gradient-ocean);
    color: white;
    box-shadow: var(--shadow-secondary);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(78, 205, 196, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

/* Card Styles */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Input Styles */
.input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid #E2E8F0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: white;
}

.input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
    animation: fadeIn 0.4s ease forwards;
}

.animate-slide-in-right {
    animation: slideInRight 0.5s ease forwards;
}

.animate-pulse-slow {
    animation: pulse 3s ease-in-out infinite;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

/* Stagger animations */
.stagger-1 {
    animation-delay: 0.1s;
}

.stagger-2 {
    animation-delay: 0.2s;
}

.stagger-3 {
    animation-delay: 0.3s;
}

.stagger-4 {
    animation-delay: 0.4s;
}

.stagger-5 {
    animation-delay: 0.5s;
}

/* Header/Navigation */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.app-logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-sunset);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background: var(--gradient-ocean);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.user-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a,
.user-dropdown button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    width: 100%;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.9375rem;
    transition: background var(--transition-fast);
}

.user-dropdown a:hover,
.user-dropdown button:hover {
    background: #F7FAFC;
}

.user-dropdown .divider {
    height: 1px;
    background: #E2E8F0;
    margin: 0.25rem 0;
}

.logout-btn {
    color: var(--color-primary) !important;
}

/* Feature Cards */
.feature-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.feature-icon.sunset {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.15) 0%, rgba(255, 142, 83, 0.15) 100%);
    color: var(--color-primary);
}

.feature-icon.ocean {
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.15) 0%, rgba(102, 126, 234, 0.15) 100%);
    color: var(--color-secondary);
}

.feature-icon.tropical {
    background: linear-gradient(135deg, rgba(17, 153, 142, 0.15) 0%, rgba(56, 239, 125, 0.15) 100%);
    color: #11998e;
}

/* Place Cards */
.place-card {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.place-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.place-card.selected {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.05) 0%, rgba(78, 205, 196, 0.1) 100%);
}

.place-image {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

/* Loading Spinner */
.spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 3px solid #E2E8F0;
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loading */
@keyframes skeleton-shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.skeleton {
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.8s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 0.75rem;
    border-radius: 0.375rem;
    margin-bottom: 0.5rem;
}

.skeleton-text.sm {
    width: 40%;
    height: 0.625rem;
}

.skeleton-text.md {
    width: 65%;
}

.skeleton-text.lg {
    width: 85%;
}

.skeleton-text.xl {
    width: 100%;
}

.skeleton-circle {
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

/* Skeleton place card - matches .place-card */
.skeleton-place-card {
    flex-shrink: 0;
    min-width: 10rem;
    max-width: 14rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
}

/* Skeleton activity - matches .activity-item */
.skeleton-activity {
    background: #f8f9fa;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Skeleton day header */
.skeleton-day-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

/* Responsive */
@media (max-width: 768px) {
    .app-header {
        padding: 0.75rem 1rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
    }
}