/* 
===========================================
HOW TO CUSTOMIZE COLORS
===========================================
You can change the colors below to customize the theme.
'--bg-color' is the main background.
'--text-color' is the text color.
'--accent-color' is used for buttons, headings, and highlights.
'--card-bg' is the background color of the photo cards.
'--card-shadow' gives the cards a soft glowing shadow.
*/

:root {
    /* LIGHT MODE COLORS (Default) */
    --bg-color: #fdfaf6; /* Soft warm white */
    --text-color: #4a3f35; /* Soft brown/dark grey */
    --accent-color: #e5a4a9; /* Pastel pink */
    --card-bg: #ffffff; /* Pure white for cards */
    --card-shadow: rgba(229, 164, 169, 0.2); /* Soft pink shadow */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
}

/* DARK MODE COLORS */
[data-theme="dark"] {
    --bg-color: #2b2526; /* Cozy dark brown/grey */
    --text-color: #fdfaf6; /* Soft light text */
    --accent-color: #d88c93; /* Muted romantic pink */
    --card-bg: #383031; /* Slightly lighter dark for cards */
    --card-shadow: rgba(0, 0, 0, 0.3); /* Dark shadow */
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    transition: background-color 0.4s ease, color 0.4s ease;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

#themeToggleBtn {
    background: var(--card-bg);
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 10px var(--card-shadow);
    transition: transform 0.3s ease, background-color 0.4s ease, border-color 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#themeToggleBtn:hover {
    transform: scale(1.1);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 20px 60px;
    max-width: 800px;
    margin: 0 auto;
}

.romantic-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-style: italic;
    color: var(--accent-color);
    margin-bottom: 10px;
    letter-spacing: 2px;
    font-weight: 400;
}

.couple-names {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.8;
    font-weight: 300;
}

/* Timeline Slider Styling */
.timeline-container {
    max-width: 1200px;
    margin: 0 auto 60px;
    padding: 0 20px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.timeline-header h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--accent-color);
}

.slider-controls {
    display: flex;
    gap: 15px;
}

.control-btn {
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--card-shadow);
    z-index: 5;
}

.control-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.1);
}

/* Enhanced Timeline Slider with Path Line */
.timeline-slider {
    display: flex;
    gap: 40px;
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 60px 0 40px; /* Extra top padding for the line */
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-snap-type: x mandatory;
    position: relative;
}

.timeline-slider::before {
    content: '';
    position: absolute;
    top: 30px; /* Position of the timeline line */
    left: 0;
    width: 200%; /* Long line to cover all items */
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    z-index: 0;
}

.timeline-slider::-webkit-scrollbar {
    display: none;
}

.slider-item {
    flex: 0 0 350px;
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--card-shadow);
    scroll-snap-align: center;
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

/* Timeline Dot */
.slider-item::before {
    content: '❤';
    position: absolute;
    top: -45px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--card-bg);
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 0.8rem;
    z-index: 3;
    box-shadow: 0 0 15px var(--accent-light);
    transition: all 0.3s ease;
}

.slider-item:hover::before {
    background: var(--accent-color);
    color: white;
    transform: translateX(-50%) scale(1.2);
}

.slider-item:hover {
    transform: translateY(10px); /* Move down slightly when hovered */
}

.slider-image {
    height: 250px;
    overflow: hidden;
}

.slider-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.slider-item:hover .slider-image img {
    transform: scale(1.1);
}

.slider-info {
    padding: 20px;
    text-align: center;
}

.slider-date {
    display: block;
    color: var(--accent-color);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.slider-info h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin: 0;
}

@media (max-width: 600px) {
    .slider-item {
        flex: 0 0 280px;
    }
    .slider-image {
        height: 200px;
    }
}

/* Gallery / Masonry Layout */
.gallery {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.category-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--accent-light);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--card-shadow);
}

.filter-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 4px 15px rgba(229, 164, 169, 0.4);
}

/* Love Stats Section */
.love-stats {
    padding: 2rem 0;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(229, 164, 169, 0.2);
    border-bottom: 1px solid rgba(229, 164, 169, 0.2);
    margin: 2rem 0;
}

.stats-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    text-align: center;
    padding: 0 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 600px) {
    .stats-container {
        flex-wrap: wrap;
        gap: 2rem;
    }
    .stat-item {
        flex: 1 1 40%;
    }
}

.category-section {
    transition: all 0.5s ease;
}

.category-header {
    width: 100%;
    margin: 60px 0 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent-light);
    position: relative;
    text-align: center;
}

.category-header h3 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: var(--accent-color);
    font-style: italic;
    margin: 0;
}

.category-header::after {
    content: '❤';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-color);
    padding: 0 15px;
    color: var(--accent-color);
    font-size: 1.2rem;
}

.category-grid {
    column-count: 3;
    column-gap: 25px;
    margin-bottom: 60px;
}

@media (max-width: 900px) {
    .category-grid {
        column-count: 2;
    }
}

@media (max-width: 600px) {
    .category-grid {
        column-count: 1;
    }
    .category-header h3 {
        font-size: 1.8rem;
    }
}

/* Photo Cards */
.photo-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
    break-inside: avoid; /* Prevents card from splitting across columns */
    box-shadow: 0 8px 24px var(--card-shadow);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease, background-color 0.4s ease;
}

.photo-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 32px var(--card-shadow);
}

.image-wrapper {
    overflow: hidden;
    position: relative;
    width: 100%;
}

.image-wrapper img {
    width: 100%;
    display: block;
    transition: transform 0.8s ease;
}

.photo-card:hover .image-wrapper img {
    transform: scale(1.06); /* Gentle zoom effect */
}

.photo-details {
    padding: 24px;
}

.date {
    display: block;
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.photo-details p {
    font-size: 1rem;
    margin: 0;
    font-weight: 300;
    line-height: 1.5;
}

/* Upload Area Placeholder */
.upload-area {
    background-color: transparent;
    border: 2px dashed var(--accent-color);
    border-radius: 16px;
    margin-bottom: 20px;
    break-inside: avoid;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    cursor: pointer;
    transition: background-color 0.4s ease, transform 0.4s ease;
    text-align: center;
    padding: 30px;
}

.upload-area:hover {
    background-color: rgba(229, 164, 169, 0.1);
    transform: translateY(-4px);
}

.upload-content {
    opacity: 0.8;
}

.upload-icon {
    display: block;
    font-size: 3.5rem;
    color: var(--accent-color);
    margin-bottom: 10px;
    line-height: 1;
    font-weight: 300;
}

.upload-area h3 {
    font-family: var(--font-heading);
    margin-bottom: 8px;
    font-size: 1.4rem;
    font-weight: 400;
}

.upload-area p {
    font-size: 0.9rem;
    font-weight: 300;
}

/* Footer */
footer {
    text-align: center;
    padding: 80px 20px 40px;
    font-family: var(--font-heading);
    font-style: italic;
    opacity: 0.6;
    font-size: 1.1rem;
}

/* Image Modal (Lightbox) */
.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    padding-top: 60px; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgba(0,0,0,0.85); 
    backdrop-filter: blur(5px);
}

.modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80vh;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    animation: zoomIn 0.3s ease;
    object-fit: contain;
}

#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #fdfaf6;
    padding: 15px 0;
    height: 150px;
    font-family: var(--font-body);
    font-size: 1.1rem;
    animation: zoomIn 0.3s ease;
}

.close-modal {
    position: absolute;
    top: 30px;
    right: 40px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.close-modal:hover,
.close-modal:focus {
    color: var(--accent-color);
    text-decoration: none;
}

@keyframes zoomIn {
    from {transform:scale(0.95); opacity:0} 
    to {transform:scale(1); opacity:1}
}

/* Make images look clickable */
.image-wrapper img {
    cursor: pointer;
}