:root {
    --primary-color: #0056b3;
    --secondary-color: #f0f4f8;
    --accent-color: #e63946;
    --text-color: #333;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --timeline-line: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* Default Background (Day) */
    background: url('https://images.unsplash.com/photo-1513002749550-c59d786b8e6c?auto=format&fit=crop&w=1920&q=80') no-repeat center center fixed;
    background-size: cover;
    margin: 0;
    padding: 0;
    color: #333;
    transition: background-image 1s ease, color 1s ease;
}

/* Time-based Backgrounds */
body.bg-morning {
    /* Sunrise / Golden Hour */
    background-image: url('https://images.unsplash.com/photo-1470252649378-9c29740c9fa8?auto=format&fit=crop&w=1920&q=80');
}

body.bg-day {
    /* Blue Sky with Clouds */
    background-image: url('https://images.unsplash.com/photo-1513002749550-c59d786b8e6c?auto=format&fit=crop&w=1920&q=80');
}

body.bg-sunset {
    /* Sunset / Orange & Purple */
    background-image: url('https://images.unsplash.com/photo-1495616811223-4d98c6e9c869?auto=format&fit=crop&w=1920&q=80');
}

body.bg-night {
    /* Starry Night */
    background-image: url('https://images.unsplash.com/photo-1472120435266-5310700c309e?auto=format&fit=crop&w=1920&q=80');
    color: #eee;
}

/* Adjust header/footer for night mode visibility */
body.bg-night header {
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
}

body.bg-night header h1, body.bg-night header .subtitle {
    color: #fff;
}

body.bg-night .calendar-section {
    background-color: rgba(255, 255, 255, 0.9); /* Keep calendar slightly bright for readability */
}

body.bg-night footer {
    color: #ccc;
}


.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: rgba(255, 255, 255, 0.9); /* Semi-transparent white */
    color: #003d82;
    padding: 20px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(5px);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
}

.subtitle {
    margin-top: 10px;
    font-size: 1.1rem;
    opacity: 0.8;
    font-weight: 300;
}

/* Calendar Widget Styles */
.calendar-section {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.calendar-header button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 50%;
    transition: background 0.2s;
}

.calendar-header button:hover {
    background: #f0f7ff;
}

.calendar-header h2 {
    margin: 0;
    color: #333;
    font-size: 1.4rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    text-align: center;
}

.calendar-day-header {
    font-weight: bold;
    color: #888;
    padding: 10px 0;
    font-size: 0.9rem;
}

.calendar-day {
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    aspect-ratio: 1; /* Keep circular */
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-day:hover:not(.empty) {
    background-color: #f0f7ff;
    color: var(--primary-color);
}

.calendar-day.today {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: bold;
}

.calendar-day.selected {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.calendar-day.empty {
    cursor: default;
}

.date-display {
    text-align: center;
    margin: 40px 0 20px;
}

.date-display h2 {
    font-size: 2rem;
    color: #003d82;
    margin-bottom: 10px;
}

.loading {
    color: #666;
    font-style: italic;
    margin-top: 10px;
}

/* Latest News Styles */
.news-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    margin: 30px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.news-header h2 {
    margin: 0;
    font-size: 1.4rem;
    color: var(--primary-color);
}

.news-source {
    font-size: 0.8rem;
    color: #666;
    background: #eee;
    padding: 2px 8px;
    border-radius: 4px;
}

.news-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;
}

/* Custom Scrollbar for News */
.news-container::-webkit-scrollbar {
    width: 6px;
}

.news-container::-webkit-scrollbar-thumb {
    background-color: #ccc;
    border-radius: 3px;
}

.news-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    padding: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.news-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 8px 0;
    line-height: 1.4;
}

.news-title a {
    color: #333;
    text-decoration: none;
}

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

.news-meta {
    font-size: 0.8rem;
    color: #888;
    margin-top: auto;
    display: flex;
    justify-content: space-between;
}

.loading-news {
    grid-column: 1 / -1;
    text-align: center;
    padding: 20px;
    color: #666;
    font-style: italic;
}

.error-news {
    grid-column: 1 / -1;
    text-align: center;
    padding: 20px;
    color: #d32f2f;
    background: #ffebee;
    border-radius: 4px;
}

.timeline {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
    margin-bottom: 50px;
}

/* Event Card Layout */
.event-card {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: auto; /* Allow content to expand */
}

.event-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

/* Calendar Leaf Visual */
.calendar-leaf-visual {
    background: #fff;
    border-bottom: 1px solid #eee;
    height: 180px; /* Increased height for better image visibility */
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.calendar-leaf-visual.has-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.6)); /* Gradient overlay */
    z-index: 1;
}

.calendar-leaf-visual:hover {
    transform: scale(1.02); /* Slight zoom on hover */
}

.leaf-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 10px;
    box-sizing: border-box;
    text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

.calendar-leaf-top {
    height: 35px;
    background-color: var(--accent-color); /* e.g. Red */
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1em;
    letter-spacing: 1px;
}

.calendar-leaf-top-transparent {
    font-size: 1em;
    font-weight: bold;
    color: white;
    background-color: rgba(230, 57, 70, 0.9); /* Red with opacity */
    padding: 2px 8px;
    border-radius: 4px;
    align-self: flex-start; /* Left align */
}

.calendar-leaf-body {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5em;
    font-weight: 800;
    color: #333;
    font-family: 'Georgia', serif;
}

.calendar-leaf-body-transparent {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4em;
    font-weight: 800;
    color: white;
    font-family: 'Georgia', serif;
}

.calendar-leaf-tag {
    position: absolute;
    bottom: 10px;
    right: 10px;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: bold;
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    z-index: 3;
}

/* Event Header (Title Area) */
.event-header {
    padding: 15px;
    background-color: #fff;
    border-top: 1px solid #f0f0f0;
    cursor: pointer;
    flex-grow: 0; /* Don't stretch excessively */
}

.event-title {
    margin: 0;
    font-size: 1.15em;
    font-weight: 600;
    color: #333;
    line-height: 1.4;
    text-align: center;
}

.expand-hint {
    text-align: center;
    color: #aaa;
    font-size: 0.8em;
    margin-top: 8px;
    transition: color 0.2s;
}

.event-card:hover .expand-hint {
    color: var(--primary-color);
}

/* Content Section (Hidden by default) */
.event-content {
    padding: 15px;
    background-color: #f9f9f9;
    border-top: 1px solid #eee;
    font-size: 0.95em;
    color: #555;
    display: none; /* Controlled by JS */
    animation: fadeIn 0.3s ease;
}

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

/* Original Styles to Keep or Modify */
.event-meta-row {
    display: none; /* Hide old meta row as we use calendar leaf now */
}


/* Tags */
.event-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8em;
    font-weight: bold;
    color: white;
}

.tag-crash { background-color: #d32f2f; }
.tag-civil { background-color: #ff9800; }
.tag-founding { background-color: #2196F3; }
.tag-birth { background-color: #9c27b0; }
.tag-milestone { background-color: #4caf50; }

/* Description & Links */
.event-description {
    font-size: 0.95em;
    line-height: 1.6;
    color: #555;
}

.event-links {
    margin-top: 10px;
    font-size: 0.9em;
    padding-top: 10px;
    border-top: 1px solid #eee;
}

.event-links a {
    color: #003d82;
    text-decoration: none;
    margin-right: 10px;
}

.event-links a:hover {
    text-decoration: underline;
}

/* Translate Button */
.translate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    margin: 10px 0;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.translate-btn:hover {
    background-color: #003d82;
    color: white; /* Ensure text color stays white */
}

.translate-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

footer {
    text-align: center;
    padding: 40px 0;
    color: #888;
    font-size: 0.9rem;
    margin-top: 40px;
    border-top: 1px solid #eee;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    .container {
        padding: 0 15px;
        width: 100%;
        box-sizing: border-box;
    }

    header {
        padding: 15px 0;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .calendar-grid {
        gap: 5px;
    }
    
    .calendar-day {
        padding: 8px;
        font-size: 0.9rem;
    }

    .date-display h2 {
        font-size: 1.5rem;
    }

    /* Timeline Cards on mobile */
    .timeline {
        grid-template-columns: 1fr; /* Force single column on mobile */
    }
    
    .event-card {
        padding: 15px;
    }
    
    .event-header h3 {
        font-size: 1.1rem;
    }

    /* Make buttons easier to tap */
    button, .translate-btn {
        min-height: 44px; 
    }
}