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

:root {
    --ink: #1a1a1a;
    --paper: #fbfdfb;
    --accent: #2d6a4f;
    --muted: #5b615c;
    --line: #e4e6e4;
}

body {
    font-family: 'Instrument Serif', Georgia, serif;
    background: var(--paper);
    background-image:
        linear-gradient(180deg, rgba(74, 124, 148, 0.05) 0%, rgba(74, 124, 148, 0) 26%),
        linear-gradient(120deg, rgba(45, 106, 79, 0.03) 0%, rgba(45, 106, 79, 0) 44%);
    color: var(--ink);
    min-height: 100vh;
    line-height: 1.6;
    padding: 1.5rem;
}

/* Navigation */
.back-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--muted);
    text-decoration: none;
    display: inline-block;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent);
}

/* Header */
.header {
    max-width: 1200px;
    margin: 0 auto 2.5rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--line);
}

.title-card h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.title-card h1 em {
    font-style: italic;
    color: var(--accent);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--muted);
    font-style: italic;
    margin-bottom: 0.875rem;
}

.title-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.attribution {
    font-style: normal;
}

.methods-link {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.methods-link:hover {
    opacity: 0.7;
}

/* Description */
.description {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--line);
    border-radius: 4px;
}

.description p {
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.description p:last-child {
    margin-bottom: 0;
}

.sources-note {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--muted);
}

.sources-note a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 0.15em;
}

/* Video Container */
.video-container {
    max-width: 1200px;
    margin: 0 auto 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.video-wrapper {
    border: 1px solid var(--line);
    padding: 1rem;
    background: var(--paper);
}

.video-wrapper h3 {
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: 0.875rem;
    color: var(--ink);
}

video {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--line);
    pointer-events: none;
}

/* Controls */
.controls {
    max-width: 1200px;
    margin: 0 auto 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.control-btn {
    font-family: 'JetBrains Mono', monospace;
    padding: 0.75rem 1.5rem;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--line);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.control-btn .icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.9rem;
    height: 0.9rem;
}

.control-btn .icon svg {
    width: 100%;
    height: 100%;
    display: block;
    fill: currentColor;
}

.control-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.year-input {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line);
    padding: 0.75rem 1rem;
    letter-spacing: 0.05em;
    width: 140px;
    text-align: center;
    line-height: 1;
}

.year-input:focus {
    outline: none;
    border-color: var(--ink);
}

/* Remove spinner arrows from number input */
.year-input::-webkit-outer-spin-button,
.year-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.year-input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}



.year-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

.year-selector label {
    color: var(--muted);
}

.year-select {
    font-family: 'JetBrains Mono', monospace;
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    background: var(--paper);
    color: var(--ink);
    border: 1px solid var(--line);
    cursor: pointer;
    transition: all 0.2s;
}

.year-select:hover,
.year-select:focus {
    border-color: var(--accent);
    outline: none;
}

/* Medium Screen Layout (Tablets) - 2 column grid */
@media (max-width: 1100px) and (min-width: 769px) {
    .video-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .header {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }

    .title-card h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .title-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .description {
        padding: 1rem;
        font-size: 0.95rem;
    }

    /* Stack all three videos on mobile */
    .video-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Keep controls in a single compact row on mobile */
    .controls {
        gap: 0.5rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: center;
        padding: 0.25rem 0;
    }

    .control-btn {
        padding: 0.5rem 0.75rem;
        font-size: 1.2rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* Hide text, show only symbols on mobile */
    .control-btn {
        font-size: 0;
        justify-content: center;
    }

    .control-btn span {
        font-size: 1.2rem;
    }

    .control-btn .icon {
        width: 1.2rem;
        height: 1.2rem;
    }

    /* Hide play/pause label text on mobile */
    #btn-label {
        display: none;
    }

    .year-input {
        width: 80px;
        padding: 0.5rem 0.5rem;
        font-size: 1rem;
        flex-shrink: 0;
    }
}