/* ==========================================================================
   OpenCD — Jewel Case CSS Framework
   Prototype: single-file system
   Author: H.M. Murdock <murdock@a-team.dev>
   Base: Open Props v2 via unpkg
   ========================================================================== */

@import "https://unpkg.com/open-props";

/* ==========================================================================
   1. Custom Properties — CD Dimension & Design Tokens
   ========================================================================== */

:root {
  /* ── Scale ──
     --cd-scale: 1  → default 2× display scale (280px = 142mm at 2×)
     Set to 0.5 for 1× (physical mm → px at 96dpi), 2 for 4×, etc.
  */
  --cd-scale: 1;

  /* ── Physical CD Dimensions (at 2× scale) ── */
  --cd-jewel-width:      calc(280px * var(--cd-scale));
  --cd-jewel-height:     calc(245px * var(--cd-scale));
  --cd-jewel-open-width: calc(560px * var(--cd-scale));
  --cd-disc-diameter:    calc(240px * var(--cd-scale));
  --cd-disc-hole:        calc(30px  * var(--cd-scale));  /* Ø15mm × 2 */
  --cd-leaflet-size:     calc(240px * var(--cd-scale));
  --cd-spine-width:      calc(14px  * var(--cd-scale));
  --cd-tray-width:       calc(260px * var(--cd-scale));

  /* ── Derived aspect ratios ── */
  --cd-aspect-jewel:   280 / 245;
  --cd-aspect-leaflet: 1 / 1;
  --cd-aspect-disc:    1 / 1;

  /* ── Surface Colors (ASW-style, NOT from Open Props — Amy finding #1) ── */
  --cd-surface-1: oklch(30% .015 265);  /* tray paper base */
  --cd-surface-2: oklch(35% .015 265);  /* tray raised panel */
  --cd-surface-3: oklch(40% .015 265);  /* leaflet inner area */
  --cd-surface-4: oklch(15% .01 265);   /* spine background — darkest */

  /* ── Typography ── */
  --cd-font-label:    var(--font-neo-grotesque);  /* Inter/Roboto stack — Amy finding #4 */
  --cd-font-body:     var(--font-serif);
  --cd-font-mono:     var(--font-mono-code, var(--font-mono));
  --cd-font-size-body:    var(--font-size-fluid-1);
  --cd-font-size-title:   var(--font-size-fluid-2);
  --cd-font-size-display: var(--font-size-fluid-3);

  /* ── Spacing insets ── */
  --cd-space-inset:  var(--size-fluid-1);
  --cd-space-stack:  var(--size-fluid-2);
  --cd-space-gutter: var(--size-fluid-3);

  /* ── Semantic Text Colors ── */
  --cd-text-primary:    var(--gray-9);
  --cd-text-secondary:  var(--gray-7);
  --cd-text-muted:      var(--gray-5);
  --cd-text-on-spine:   var(--gray-1);

  /* ── Surface / Tray Mappings ── */
  --cd-tray-bg:         var(--cd-surface-1);
  --cd-tray-bg-raised:  var(--cd-surface-2);
  --cd-tray-bg-sunken:  var(--cd-surface-3);
  --cd-spine-bg:        var(--cd-surface-4);

  /* ── Grid Colors (custom — NOT Open Props tokens, Amy finding #2) ── */
  --cd-grid-color:     var(--gray-3);
  --cd-grid-color-alt: var(--gray-2);
  --cd-grid-fine:      4px;
  --cd-grid-coarse:    8px;

  /* ── Advisory Badge ── */
  --cd-advisory-red:      var(--red-6);
  --cd-advisory-red-dark: var(--red-7);
  --cd-advisory-bg:       var(--red-0);

  /* ── Jewel Case Decorations ── */
  --cd-jewel-radius:       var(--radius-2);   /* 5px */
  --cd-jewel-shadow:       var(--shadow-2);
  --cd-jewel-shadow-raised: var(--shadow-3);
  --cd-leaflet-radius:     var(--radius-3);   /* 1rem */

  /* ── Spine Typography ── */
  --cd-spine-font-xs:   var(--font-size-0);
  --cd-spine-font-sm:   var(--font-size-1);
  --cd-spine-font-md:   var(--font-size-2);
  --cd-spine-font-lg:   var(--font-size-3);

  /* ── Motion & Print ── */
  --cd-transition-duration: 200ms;
  --cd-ease-flip:           cubic-bezier(0.34, 1.56, 0.64, 1);
  --cd-print-jewel-width:   142mm;
  --cd-print-jewel-height:  125mm;
}

/* ==========================================================================
   2. Reset
   ========================================================================== */

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

/* ==========================================================================
   3. Jewel Case Container
   ========================================================================== */

.cd-jewel-case {
  display: grid;
  grid-template-columns: var(--cd-spine-width) 1fr;
  grid-template-rows: auto 1fr;
  width: var(--cd-jewel-width);
  min-height: var(--cd-jewel-height);
  background: var(--gray-0);
  border-radius: var(--cd-jewel-radius);
  box-shadow: var(--cd-jewel-shadow);
  overflow: hidden;
  position: relative;
  transition: width var(--cd-transition-duration) var(--ease-3);
  font-family: var(--cd-font-body);
  color: var(--cd-text-primary);
  container-type: inline-size;
}

.cd-jewel-case--open {
  width: var(--cd-jewel-open-width);
}

.cd-jewel-case[data-jewel-state="open"] {
  width: var(--cd-jewel-open-width);
}

/* ── Internal layout wrapper ── */
.cd-jewel-case > .cd-jewel-inner {
  grid-column: 2;
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  padding: var(--cd-space-inset);
  gap: var(--cd-space-stack);
  min-height: 0;
}

/* ==========================================================================
   4. Spine
   ========================================================================== */

.cd-spine {
  grid-column: 1;
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--cd-spine-bg);
  color: var(--cd-text-on-spine);
  font-family: var(--cd-font-label);
  padding: var(--size-2) var(--size-1);
  gap: var(--size-2);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  user-select: none;
}

.cd-spine .spine-label {
  font-size: var(--cd-spine-font-sm);
  font-weight: 600;
  letter-spacing: var(--font-letterspacing-3, 0.1em);
  text-transform: uppercase;
}

.cd-spine .spine-track {
  font-size: var(--cd-spine-font-xs);
  letter-spacing: var(--font-letterspacing-1, 0.05em);
  opacity: 0.8;
}

/* ── Side spine variant ── */
.cd-spine--side {
  writing-mode: horizontal-tb;
  flex-direction: row;
}

/* ==========================================================================
   5. Leaflet Content & Pages
   ========================================================================== */

.leaflet-content {
  display: flex;
  flex-direction: column;
  gap: var(--cd-space-stack);
  max-width: var(--cd-leaflet-size);
  position: relative;
  background:
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--cd-grid-coarse) * 3 - 1px),
      var(--cd-grid-color) calc(var(--cd-grid-coarse) * 3 - 1px) calc(var(--cd-grid-coarse) * 3)
    ),
    var(--cd-tray-bg);
  border-radius: var(--cd-leaflet-radius);
  padding: var(--cd-space-inset);
}

.leaflet-page {
  aspect-ratio: var(--cd-aspect-leaflet);
  background: var(--gray-0);
  border-radius: calc(var(--cd-leaflet-radius) / 2);
  padding: var(--cd-space-inset);
  display: flex;
  flex-direction: column;
  gap: var(--size-2);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  transition: transform var(--cd-transition-duration) var(--cd-ease-flip);
  position: relative;
}

.leaflet-page[data-leaflet-active="true"] {
  box-shadow: var(--cd-jewel-shadow);
}

.leaflet-page[data-leaflet-direction="rtl"] {
  direction: rtl;
}

.leaflet-page h1,
.leaflet-page h2 {
  font-family: var(--cd-font-label);
  font-size: var(--cd-font-size-title);
  color: var(--cd-text-primary);
  line-height: 1.2;
}

.leaflet-page p {
  font-family: var(--cd-font-body);
  font-size: var(--cd-font-size-body);
  color: var(--cd-text-secondary);
  line-height: 1.6;
}

.leaflet-page .leaflet-meta {
  font-family: var(--cd-font-mono);
  font-size: var(--cd-spine-font-xs);
  color: var(--cd-text-muted);
  margin-top: auto;
}

/* ==========================================================================
   6. Disc Art
   ========================================================================== */

.disc-art {
  width: var(--cd-disc-diameter);
  aspect-ratio: var(--cd-aspect-disc);
  border-radius: 50%;
  background:
    radial-gradient(
      circle at 30% 30%,
      var(--gray-4) 0%,
      var(--gray-2) 40%,
      var(--gray-6) 70%,
      var(--gray-2) 100%
    );
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: inset 0 0 8px rgba(0,0,0,.12);
}

.disc-art::before {
  content: "";
  position: absolute;
  width: var(--cd-disc-hole);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--gray-0);
  box-shadow: inset 0 0 3px rgba(0,0,0,.15);
}

.disc-hole {
  position: absolute;
  width: calc(var(--cd-disc-hole) * 0.6);
  aspect-ratio: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--cd-disc-hole) * 0.5);
  color: var(--gray-4);
  z-index: 1;
  pointer-events: none;
}

/* ── Disc art variants ── */
.disc-art--sheen {
  background:
    radial-gradient(
      circle at 25% 25%,
      var(--gray-4) 0%,
      var(--gray-2) 35%,
      var(--gray-5) 50%,
      transparent 65%
    ),
    radial-gradient(
      circle at 75% 75%,
      var(--gray-7) 0%,
      var(--gray-3) 40%,
      transparent 70%
    ),
    repeating-radial-gradient(
      circle at 50%,
      transparent 0 calc(var(--cd-disc-hole) * 0.5),
      var(--gray-3) calc(var(--cd-disc-hole) * 0.5) calc(var(--cd-disc-hole) * 0.5 + 1px)
    );
}

/* ==========================================================================
   7. Human Advisory Badge
   ========================================================================== */

.human-advisory {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #000;
  color: #fff;
  border: 2px solid #000;
  font-family: Impact, "Arial Black", var(--cd-font-label), sans-serif;
  text-transform: uppercase;
  text-align: center;
  padding: 0;
  width: fit-content;
  max-width: 100%;
  position: absolute;
  bottom: var(--cd-space-inset);
  right: var(--cd-space-inset);
}

.human-advisory .advisory-row {
  width: 100%;
  padding: var(--size-1) var(--size-3);
  font-size: var(--cd-spine-font-sm);
  letter-spacing: var(--font-letterspacing-3, 0.1em);
  line-height: 1.2;
  white-space: nowrap;
}

.human-advisory .advisory-row--black {
  background: #000;
  color: #fff;
}

.human-advisory .advisory-row--white {
  background: #fff;
  color: #000;
}

.human-advisory .advisory-row--red {
  background: var(--cd-advisory-red);
  color: #fff;
}

/* ── Human Advisory variants ── */
.human-advisory--red .advisory-row--black {
  background: var(--cd-advisory-red-dark);
  color: #fff;
}

.human-advisory--red .advisory-row--white {
  background: var(--cd-advisory-red);
  color: #fff;
}

/* ==========================================================================
   8. Back Tray
   ========================================================================== */

.back-tray {
  display: grid;
  grid-template-columns: var(--cd-spine-width) 1fr var(--cd-spine-width);
  background: var(--cd-tray-bg);
  border-top: 1px solid var(--cd-grid-color);
  padding: 0;
  position: relative;
}

.back-tray .tray-credits {
  grid-column: 2;
  padding: var(--cd-space-inset);
  display: flex;
  flex-direction: column;
  gap: var(--cd-space-stack);
  background: var(--cd-tray-bg-raised);
  border-radius: 0 0 var(--cd-leaflet-radius) var(--cd-leaflet-radius);
}

.tray-credits h2 {
  font-family: var(--cd-font-label);
  font-size: var(--cd-font-size-title);
  color: var(--cd-text-primary);
  text-transform: uppercase;
  letter-spacing: var(--font-letterspacing-2, 0.075em);
}

.tray-credits ol {
  list-style: none;
  counter-reset: track;
  display: flex;
  flex-direction: column;
  gap: var(--size-1);
}

.tray-credits ol li {
  counter-increment: track;
  font-family: var(--cd-font-label);
  font-size: var(--cd-font-size-body);
  color: var(--cd-text-secondary);
  padding: var(--size-1) 0;
  border-bottom: 1px solid var(--cd-grid-color-alt);
  display: flex;
  gap: var(--size-2);
}

.tray-credits ol li::before {
  content: counter(track, decimal-leading-zero) ".";
  font-family: var(--cd-font-mono);
  color: var(--cd-text-muted);
  min-width: 2.5ch;
}

.tray-credits .credits-label {
  font-family: var(--cd-font-mono);
  font-size: var(--cd-spine-font-xs);
  color: var(--cd-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--font-letterspacing-1, 0.05em);
}

.tray-credits p {
  font-family: var(--cd-font-body);
  font-size: var(--cd-font-size-body);
  color: var(--cd-text-secondary);
  line-height: 1.5;
}

/* ── Back tray spine labels ── */
.back-tray .cd-spine {
  grid-row: 1;
  background: var(--cd-spine-bg);
}

/* ==========================================================================
   9. Grid Overlay Utility
   ========================================================================== */

.cd-grid {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--cd-grid-coarse) - 1px),
      var(--cd-grid-color) calc(var(--cd-grid-coarse) - 1px) var(--cd-grid-coarse)
    );
}

.cd-grid--fine {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--cd-grid-fine) - 1px),
      var(--cd-grid-color) calc(var(--cd-grid-fine) - 1px) var(--cd-grid-fine)
    );
}

.cd-grid--coarse {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--cd-grid-coarse) - 1px),
      var(--cd-grid-color) calc(var(--cd-grid-coarse) - 1px) var(--cd-grid-coarse)
    );
}

.cd-grid--crosshatch {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--cd-grid-fine) - 1px),
      var(--cd-grid-color-alt) calc(var(--cd-grid-fine) - 1px) var(--cd-grid-fine)
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0 calc(var(--cd-grid-coarse) - 1px),
      var(--cd-grid-color) calc(var(--cd-grid-coarse) - 1px) var(--cd-grid-coarse)
    );
}

/* ==========================================================================
   10. Open / Closed State Transitions
   ========================================================================== */

.cd-jewel-case .back-tray {
  display: none;
}

.cd-jewel-case--open .back-tray,
.cd-jewel-case[data-jewel-state="open"] .back-tray {
  display: grid;
}

/* ==========================================================================
   11. Responsive Breakpoints (Open Props container queries)
   ========================================================================== */

@container (max-width: 350px) {
  .cd-jewel-case {
    width: 100% !important;
    grid-template-columns: 1fr;
  }

  .cd-spine {
    writing-mode: horizontal-tb;
    flex-direction: row;
    padding: var(--size-1) var(--size-2);
    grid-column: 1;
    grid-row: 1;
  }

  .cd-jewel-inner {
    grid-column: 1;
    grid-row: 2;
  }

  .disc-art {
    width: 100% !important;
    max-width: var(--cd-disc-diameter);
    margin: 0 auto;
  }

  .leaflet-content {
    max-width: 100%;
  }

  .human-advisory {
    position: static;
    margin-top: var(--cd-space-stack);
    align-self: center;
  }
}

@container (min-width: 351px) and (max-width: 549px) {
  .cd-jewel-case {
    width: 100% !important;
    max-width: var(--cd-jewel-width);
  }

  .leaflet-content {
    gap: var(--size-2);
  }

  .human-advisory .advisory-row {
    font-size: var(--cd-spine-font-xs);
    padding: var(--size-1) var(--size-2);
  }
}

/* ==========================================================================
   12. Print Styles
   ========================================================================== */

@media print {
  .cd-jewel-case {
    width: var(--cd-print-jewel-width);
    height: var(--cd-print-jewel-height);
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .cd-jewel-case--open {
    width: calc(var(--cd-print-jewel-width) * 2);
  }

  .back-tray {
    display: grid !important;
  }

  .human-advisory {
    position: absolute;
  }

  .disc-art {
    box-shadow: none;
  }

  .cd-jewel-case,
  .leaflet-page,
  .back-tray {
    border-radius: 0;
  }
}

/* ==========================================================================
   13. Grain Texture Utility
   ========================================================================== */

.cd-grain {
  background-image: repeating-radial-gradient(
    circle at 50% 50%,
    transparent 0 1px,
    rgba(0,0,0,.02) 1px 2px,
    transparent 2px 4px
  ),
  repeating-radial-gradient(
    circle at 100% 100%,
    transparent 0 3px,
    rgba(0,0,0,.015) 3px 4px,
    transparent 4px 8px
  );
  background-size: 120px 120px, 200px 200px;
}