/* ============================================================
   yami.tube — Dark Academia Archive
   Colors: #1A1410, #2C2118, #3A2E22, #C4603A, #A04A2A, #E8DCC8, #D6C9B0, #7A6E64, #F0A050
   Fonts: Bebas Neue, Cormorant Garamond, Space Mono
   ============================================================ */

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

:root {
    --vault-black:    #1A1410;
    --tobacco-brown:  #2C2118;
    --charred-walnut: #3A2E22;
    --terracotta:     #C4603A;
    --burnt-sienna:   #A04A2A;
    --aged-parchment: #E8DCC8;
    --linen:          #D6C9B0;
    --iron:           #7A6E64;
    --amber-glow:     #F0A050;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--vault-black);
    color: var(--aged-parchment);
    font-family: 'Space Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* --- Grain Texture Overlay (SVG feTurbulence) --- */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.06;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23grain)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 300px 300px;
}

/* --- Intro Overlay --- */
#intro-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--vault-black);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

#intro-overlay.fade-out {
    opacity: 0;
    transition: opacity 400ms ease 200ms;
    pointer-events: none;
}

#intro-overlay.hidden {
    display: none;
}

#intro-wordmark {
    display: flex;
    gap: 0.05em;
}

.wm-letter {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(64px, 12vw, 120px);
    letter-spacing: 0.08em;
    color: var(--aged-parchment);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.wm-letter.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Background Blobs --- */
.blob {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    animation: blobMorph 12s ease-in-out infinite alternate;
}

.blob--header {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -80px;
    background-color: #C4603A;
    opacity: 0.04;
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
}

.blob--mid {
    width: 300px;
    height: 300px;
    top: 45%;
    left: -80px;
    background-color: #2C2118;
    opacity: 0.6;
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation-delay: -4s;
}

.blob--shelf {
    width: 500px;
    height: 500px;
    top: 70%;
    right: 10%;
    background-color: #A04A2A;
    opacity: 0.08;
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation-delay: -8s;
}

@keyframes blobMorph {
    0%   { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
    100% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
}

/* --- Vault Header --- */
#vault-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--vault-black);
    z-index: 1000;
    border-bottom: 1px solid var(--charred-walnut);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 24px;
    max-width: 1600px;
    margin: 0 auto;
}

.header-wordmark .wordmark-text {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 28px;
    letter-spacing: 0.08em;
    color: var(--aged-parchment);
    line-height: 1;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 200ms ease;
}

.search-btn:hover {
    opacity: 0.7;
}

.search-icon {
    width: 20px;
    height: 20px;
    display: block;
}

/* --- Main Content --- */
#main-content {
    padding-top: 60px;
    position: relative;
    z-index: 1;
}

/* --- Section Labels --- */
.section-label {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 40px 24px 20px;
    max-width: 1600px;
    margin: 0 auto;
}

.section-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 32px;
    letter-spacing: 0.2em;
    color: var(--aged-parchment);
    line-height: 1;
}

/* --- Aperture Hexagon Ornament --- */
.aperture-ornament {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-color: var(--terracotta);
    clip-path: polygon(50% 0%, 93.3% 25%, 93.3% 75%, 50% 100%, 6.7% 75%, 6.7% 25%);
    flex-shrink: 0;
}

/* --- Masonry Grid --- */
.masonry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    grid-auto-rows: 10px;
    gap: 0 12px;
    padding: 0 24px 24px;
    max-width: 1600px;
    margin: 0 auto;
}

/* --- Cards --- */
.card {
    position: relative;
    background-color: var(--tobacco-brown);
    border: 1px solid var(--charred-walnut);
    cursor: pointer;
    transition: box-shadow 280ms cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
    animation: bounceEnter 500ms cubic-bezier(0.34, 1.56, 0.64, 1) both;
    opacity: 0;
    margin-bottom: 12px;
}

.card.in-view {
    opacity: 1;
}

.card:hover,
.card.lit {
    box-shadow: 0 8px 32px rgba(196, 96, 58, 0.35), inset 0 0 0 1px rgba(196, 96, 58, 0.2);
    transform: translateY(-3px);
}

/* Film-frame border corners via pseudo-elements */
.card::before,
.card::after {
    content: '';
    position: absolute;
    z-index: 2;
    pointer-events: none;
}

/* Top-left and bottom-left corner notches via box-shadow on ::before */
.card::before {
    top: 0;
    left: 0;
    width: 4px;
    height: 12px;
    background-color: var(--charred-walnut);
    box-shadow:
        0 0 0 0 transparent,
        calc(100% - 4px) 0 0 0 var(--charred-walnut),  /* top-right top notch */
        0 calc(100% - 12px) 0 0 var(--charred-walnut), /* bottom-left notch start — approx */
        0 calc(100% - 12px) 0 0 var(--charred-walnut);
}

/* Bottom corners via card-inner */
.card-inner {
    position: relative;
    padding: 0 0 14px 0;
    height: 100%;
}

/* Film-frame notches: all four corners using a helper approach */
.card-inner::before,
.card-inner::after {
    content: '';
    position: absolute;
    pointer-events: none;
    z-index: 3;
    background-color: var(--charred-walnut);
    width: 4px;
    height: 12px;
}

.card-inner::before {
    top: 0;
    left: 0;
}

.card-inner::after {
    top: 0;
    right: 0;
}

/* Bounce-enter animation */
@keyframes bounceEnter {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Card Thumbnails --- */
.card-thumb-wrap {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.card-thumb {
    width: 100%;
    height: 160px;
    position: relative;
    filter: sepia(0.3) contrast(1.1) brightness(0.85);
    transition: filter 280ms ease;
    overflow: hidden;
}

.card-thumb--tall {
    height: 240px;
}

.card-thumb--short {
    height: 100px;
}

.card:hover .card-thumb,
.card.lit .card-thumb {
    filter: sepia(0) contrast(1) brightness(1);
}

/* Geometric elements inside thumbs */
.thumb-geo {
    position: absolute;
    opacity: 0.3;
    pointer-events: none;
}

.thumb-geo--circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 2px solid var(--terracotta);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thumb-geo--rect {
    width: 60%;
    height: 55%;
    border: 1px solid var(--aged-parchment);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thumb-geo--triangle {
    width: 0;
    height: 0;
    border-left: 35px solid transparent;
    border-right: 35px solid transparent;
    border-bottom: 60px solid var(--terracotta);
    opacity: 0.2;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
}

.thumb-geo--line {
    width: 80%;
    height: 1px;
    background-color: var(--aged-parchment);
    top: 70%;
    left: 10%;
}

.thumb-geo--hexagon {
    width: 60px;
    height: 60px;
    background-color: var(--terracotta);
    clip-path: polygon(50% 0%, 93.3% 25%, 93.3% 75%, 50% 100%, 6.7% 75%, 6.7% 25%);
    opacity: 0.25;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thumb-geo--diamond {
    width: 50px;
    height: 50px;
    background-color: var(--amber-glow);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    opacity: 0.2;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.thumb-geo--aperture {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 8px solid var(--aged-parchment);
    opacity: 0.15;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: inset 0 0 0 20px rgba(240, 160, 80, 0.1);
}

/* --- Card Text --- */
.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px 4px;
}

.card-category {
    font-family: 'Space Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.12em;
    color: var(--terracotta);
    text-transform: uppercase;
}

.card-duration {
    font-family: 'Space Mono', monospace;
    font-size: 10px;
    color: var(--iron);
    letter-spacing: 0.05em;
}

.card-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: 17px;
    line-height: 1.3;
    color: var(--linen);
    padding: 4px 14px 6px;
}

.card-excerpt {
    font-family: 'Space Mono', monospace;
    font-size: 11px;
    color: var(--iron);
    padding: 0 14px 8px;
    line-height: 1.5;
}

/* --- Interstitial Divider --- */
.interstitial-divider {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.divider-ornament {
    font-family: 'Space Mono', monospace;
    font-size: 13px;
    color: var(--charred-walnut);
    letter-spacing: 0.3em;
    opacity: 0.6;
    white-space: nowrap;
}

/* --- Curated Shelf --- */
#shelf-section {
    position: relative;
}

.shelf-wrapper {
    overflow: hidden;
    cursor: grab;
    position: relative;
}

.shelf-wrapper:active {
    cursor: grabbing;
}

.shelf-track {
    display: flex;
    gap: 16px;
    padding: 0 24px 32px;
    will-change: transform;
}

.shelf-card {
    flex: 0 0 40vw;
    min-width: 280px;
    max-width: 480px;
    background-color: var(--tobacco-brown);
    border: 1px solid var(--charred-walnut);
    position: relative;
    cursor: pointer;
    transition: box-shadow 280ms cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.shelf-card:hover {
    box-shadow: 0 8px 32px rgba(196, 96, 58, 0.35), inset 0 0 0 1px rgba(196, 96, 58, 0.2);
    transform: translateY(-3px);
}

.shelf-thumb {
    width: 100%;
    height: 340px;
    position: relative;
    filter: sepia(0.3) contrast(1.1) brightness(0.85);
    transition: filter 280ms ease;
    overflow: hidden;
}

.shelf-card:hover .shelf-thumb {
    filter: sepia(0) contrast(1) brightness(1);
}

.shelf-card-info {
    padding: 16px 20px 20px;
}

.shelf-card-category {
    font-family: 'Space Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--terracotta);
    text-transform: uppercase;
    display: block;
    margin-bottom: 6px;
}

.shelf-card-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: 22px;
    line-height: 1.2;
    color: var(--linen);
    margin-bottom: 10px;
}

.shelf-card-year {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 14px;
    letter-spacing: 0.2em;
    color: var(--iron);
}

/* Film-frame corners on shelf cards */
.shelf-card::before,
.shelf-card::after {
    content: '';
    position: absolute;
    z-index: 2;
    pointer-events: none;
    background-color: var(--charred-walnut);
    width: 4px;
    height: 12px;
}

.shelf-card::before {
    top: 0;
    left: 0;
}

.shelf-card::after {
    top: 0;
    right: 0;
}

/* --- Archive Footer --- */
#archive-footer {
    background-color: var(--vault-black);
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.footer-rule {
    width: 100%;
    height: 1px;
    background-color: var(--charred-walnut);
    position: absolute;
    top: 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.footer-domain {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.15em;
    color: var(--iron);
    font-variant: small-caps;
    text-transform: lowercase;
}

.footer-year {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 14px;
    letter-spacing: 0.2em;
    color: var(--iron);
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--vault-black);
}

::-webkit-scrollbar-thumb {
    background: var(--charred-walnut);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--terracotta);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .masonry-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .shelf-card {
        flex: 0 0 70vw;
    }
}

@media (max-width: 600px) {
    .masonry-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0 8px;
    }

    .header-inner {
        padding: 0 16px;
    }

    .section-label {
        padding: 30px 16px 14px;
    }

    .section-title {
        font-size: 24px;
    }

    .shelf-card {
        flex: 0 0 85vw;
    }
}