@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    --bg: #0a0e17;
    --bg-layer: #11182a;
    --card: rgba(17, 24, 42, 0.92);
    --text: #eef3ff;
    --muted: #b6c3dc;
    --accent: #ff6f3c;
    --accent-soft: rgba(255, 111, 60, 0.18);
    --outline: rgba(115, 152, 225, 0.34);
}

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

body {
    min-height: 100vh;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
    background:
        radial-gradient(900px 380px at 10% -15%, rgba(255, 111, 60, 0.2), transparent 58%),
        radial-gradient(780px 320px at 95% 12%, rgba(77, 124, 255, 0.18), transparent 60%),
        linear-gradient(180deg, #090d17 0%, #0a1220 65%, #0b1629 100%);
    padding: clamp(1.2rem, 3vw, 2rem);
}

.page-header,
.page-main {
    width: min(1120px, 100%);
    margin: 0 auto;
}

.page-header {
    margin-bottom: 1.8rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.9rem;
    padding: 0.5rem 0.9rem;
    border: 1px solid var(--outline);
    border-radius: 999px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.92rem;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.back-link:hover,
.back-link:focus-visible {
    background: var(--accent-soft);
    border-color: var(--accent);
    transform: translateY(-1px);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.1rem);
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 0.65rem;
}

.subhead {
    max-width: 66ch;
    color: var(--muted);
    font-size: clamp(0.98rem, 2.4vw, 1.1rem);
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-bottom: 1.3rem;
}

.filter-btn {
    border: 1px solid var(--outline);
    border-radius: 10px;
    background: rgba(6, 11, 22, 0.66);
    color: var(--text);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.86rem;
    letter-spacing: 0.01em;
    padding: 0.52rem 0.82rem;
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.filter-btn:hover,
.filter-btn:focus-visible {
    transform: translateY(-1px);
    border-color: #90b2ff;
}

.filter-btn.active {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.collection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.collection-card {
    background: linear-gradient(165deg, rgba(15, 24, 44, 0.92), var(--card));
    border: 1px solid var(--outline);
    border-radius: 18px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.72rem;
    box-shadow: 0 16px 28px rgba(1, 4, 10, 0.4);
    animation: card-enter 0.45s ease both;
}

.media-type {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
}

.title {
    font-size: 1.08rem;
    line-height: 1.2;
}

.summary {
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.45;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    color: #cbd8ef;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.42rem;
}

.tags span {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.74rem;
    color: #d9e4ff;
    border: 1px solid rgba(132, 166, 237, 0.35);
    border-radius: 999px;
    padding: 0.2rem 0.54rem;
    background: rgba(76, 110, 180, 0.2);
}

.open-link {
    margin-top: auto;
    display: inline-flex;
    width: fit-content;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82rem;
    color: #0f1827;
    background: linear-gradient(135deg, #ff6f3c, #ffc559);
    padding: 0.42rem 0.68rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.18s ease;
}

.open-link:hover,
.open-link:focus-visible {
    transform: translateY(-1px);
}

.empty-state {
    margin-top: 1rem;
    color: var(--muted);
}

@keyframes card-enter {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 700px) {
    body {
        padding: 1rem;
    }

    .collection-grid {
        grid-template-columns: 1fr;
    }
}