/* Historical Moments - Vintage Sticker Collection */
/* Color Palette: Parchment & Ink with Gold Accents */

:root {
    /* Core Colors */
    --parchment: #F4ECD8;
    --parchment-dark: #E8DCC8;
    --parchment-light: #FAF6ED;
    --ink: #2C2C2C;
    --ink-light: #4A4A4A;
    --sepia: #8B4513;
    --sepia-light: #A0522D;
    --gold: #C9A87C;
    --gold-dark: #B8966B;
    --gold-light: #D4B896;
    
    /* Era Colors */
    --ancient: #D4A574;
    --classical: #DEB887;
    --medieval: #8B7355;
    --renaissance: #DAA520;
    --discovery: #4682B4;
    --industrial: #2F4F4F;
    --modern: #4169E1;
    
    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Cormorant Garamond', serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 5rem;
    
    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(44, 44, 44, 0.15);
    --shadow-medium: 0 8px 30px rgba(44, 44, 44, 0.2);
    --shadow-heavy: 0 12px 40px rgba(44, 44, 44, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--parchment);
    color: var(--ink);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Paper Texture Overlay */
.paper-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Header */
.site-header {
    background: linear-gradient(180deg, var(--parchment-light) 0%, var(--parchment) 100%);
    padding: var(--space-xxl) var(--space-lg);
    text-align: center;
    border-bottom: 3px double var(--gold);
    position: relative;
}

.site-header::before,
.site-header::after {
    content: '❦';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--gold);
    opacity: 0.5;
}

.site-header::before {
    left: 10%;
}

.site-header::after {
    right: 10%;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.stamp-logo {
    display: inline-block;
    width: 80px;
    height: 80px;
    border: 3px solid var(--sepia);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--sepia);
    margin-bottom: var(--space-md);
    transform: rotate(-5deg);
    box-shadow: 
        inset 0 0 20px rgba(139, 69, 19, 0.1),
        0 4px 10px rgba(0, 0, 0, 0.1);
    position: relative;
}

.stamp-logo::after {
    content: '';
    position: absolute;
    inset: -5px;
    border: 1px dashed var(--gold);
    border-radius: 50%;
    opacity: 0.5;
}

.site-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--ink);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.site-subtitle {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-style: italic;
    color: var(--ink-light);
    margin-bottom: var(--space-md);
}

.ornament {
    font-size: 2rem;
    color: var(--gold);
    opacity: 0.7;
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

/* Intro Section */
.intro-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-xxl);
    padding: var(--space-xl);
    background: var(--parchment-light);
    border: 1px solid var(--gold-light);
    border-radius: 4px;
    position: relative;
}

.intro-section::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid var(--gold);
    opacity: 0.3;
    pointer-events: none;
}

.intro-text {
    font-family: var(--font-body);
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--ink);
    font-style: italic;
}

/* Timeline Section */
.timeline-section {
    position: relative;
    padding: var(--space-xl) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, 
        transparent 0%, 
        var(--gold) 10%, 
        var(--gold) 90%, 
        transparent 100%
    );
    transform: translateX(-50%);
    opacity: 0.5;
}

/* Events Grid */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

/* Event Card */
.event-card {
    perspective: 1000px;
    cursor: pointer;
    transition: transform var(--transition-medium);
}

.event-card:hover {
    transform: translateY(-5px);
}

.event-card.hidden {
    display: none;
}

/* Sticker Container */
.sticker-container {
    position: relative;
    background: var(--parchment-light);
    border-radius: 8px;
    padding: 8px;
    box-shadow: 
        0 4px 6px rgba(0, 0, 0, 0.1),
        0 10px 20px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transition: all var(--transition-medium);
}

.event-card:hover .sticker-container {
    box-shadow: 
        0 8px 12px rgba(0, 0, 0, 0.15),
        0 20px 40px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transform: rotate(0deg) scale(1.02);
}

/* Sticker Edge Effect */
.sticker-edge {
    position: absolute;
    inset: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.4) 0%, 
        transparent 50%, 
        rgba(0, 0, 0, 0.05) 100%
    );
    pointer-events: none;
    z-index: 2;
}

.sticker-edge::after {
    content: '';
    position: absolute;
    inset: 4px;
    border: 1px solid var(--gold);
    border-radius: 4px;
    opacity: 0.5;
}

/* Sticker Content */
.sticker-content {
    position: relative;
    background: var(--parchment);
    border-radius: 4px;
    overflow: hidden;
}

/* Event Image */
.event-image {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.event-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.2) 0%, 
        transparent 50%, 
        rgba(0, 0, 0, 0.1) 100%
    );
    pointer-events: none;
}

.event-icon {
    font-size: 4rem;
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.2));
    z-index: 1;
}

/* Event Info */
.event-info {
    padding: var(--space-md);
    text-align: center;
    background: var(--parchment-light);
    border-top: 2px solid var(--gold-light);
}

.event-year {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--sepia);
    background: var(--parchment);
    padding: 4px 12px;
    border: 1px solid var(--gold);
    border-radius: 20px;
    margin-bottom: var(--space-xs);
    letter-spacing: 0.05em;
}

.event-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: var(--space-xs);
    line-height: 1.2;
}

.event-location {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-light);
    font-style: italic;
}

/* Event Details (for modal) */
.event-details {
    display: none;
}

/* Filter Section */
.filter-section {
    margin-top: var(--space-xxl);
    text-align: center;
    padding: var(--space-xl);
    background: var(--parchment-light);
    border-top: 2px solid var(--gold-light);
    border-bottom: 2px solid var(--gold-light);
}

.filter-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--ink);
    margin-bottom: var(--space-lg);
    position: relative;
    display: inline-block;
}

.filter-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--gold);
}

.era-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    max-width: 900px;
    margin: 0 auto;
}

.era-btn {
    font-family: var(--font-body);
    font-size: 1rem;
    padding: var(--space-xs) var(--space-md);
    background: var(--parchment);
    border: 2px solid var(--gold);
    border-radius: 30px;
    color: var(--ink);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.era-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(201, 168, 124, 0.2), transparent);
    transition: left 0.5s ease;
}

.era-btn:hover::before {
    left: 100%;
}

.era-btn:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(201, 168, 124, 0.3);
}

.era-btn.active {
    background: var(--sepia);
    border-color: var(--sepia);
    color: var(--parchment-light);
}

/* Footer */
.site-footer {
    background: var(--ink);
    color: var(--parchment);
    padding: var(--space-xxl) var(--space-lg);
    text-align: center;
    margin-top: var(--space-xxl);
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-content .ornament {
    margin-bottom: var(--space-md);
}

.footer-text {
    font-family: var(--font-body);
    font-size: 1.3rem;
    font-style: italic;
    margin-bottom: var(--space-xs);
    color: var(--gold-light);
}

.footer-author {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--parchment-dark);
    margin-bottom: var(--space-lg);
}

.footer-copyright {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--ink-light);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-top: 1px solid var(--ink-light);
    padding-top: var(--space-md);
    margin-top: var(--space-lg);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(44, 44, 44, 0.9);
    z-index: 2000;
    padding: var(--space-lg);
    overflow-y: auto;
    backdrop-filter: blur(5px);
}

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

.modal-content {
    background: var(--parchment);
    border-radius: 8px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-heavy);
    border: 3px double var(--gold);
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 2rem;
    color: var(--ink-light);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background: var(--parchment-dark);
    color: var(--ink);
    transform: rotate(90deg);
}

.modal-header {
    padding: var(--space-xl);
    background: linear-gradient(135deg, var(--parchment-light) 0%, var(--parchment) 100%);
    border-bottom: 2px solid var(--gold-light);
    text-align: center;
}

.modal-year {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--sepia);
    background: var(--parchment);
    padding: 6px 16px;
    border: 2px solid var(--gold);
    border-radius: 20px;
    margin-bottom: var(--space-sm);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--ink);
    margin-bottom: var(--space-xs);
}

.modal-location {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--ink-light);
    font-style: italic;
}

.modal-body {
    padding: var(--space-xl);
}

.modal-description {
    font-family: var(--font-body);
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--ink);
}

/* Responsive Design */
@media (max-width: 768px) {
    .site-header::before,
    .site-header::after {
        display: none;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    .events-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: var(--space-lg);
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .era-filters {
        gap: var(--space-xs);
    }
    
    .era-btn {
        font-size: 0.9rem;
        padding: 8px 16px;
    }
    
    .modal-content {
        margin: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .events-grid {
        grid-template-columns: 1fr;
    }
    
    .stamp-logo {
        width: 60px;
        height: 60px;
        font-size: 1.4rem;
    }
    
    .site-title {
        font-size: 1.6rem;
    }
    
    .intro-text {
        font-size: 1.1rem;
    }
}

/* Print Styles */
@media print {
    .paper-texture,
    .era-filters,
    .modal {
        display: none !important;
    }
    
    .event-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}