opencd/opencd.css

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/* ==========================================================================
OpenCD — CD Jewel Case CSS Framework (Production)
Author: B.A. Baracus <ba@a-team.dev>
Base: Open Props v2 via unpkg
Principle: Zero magic numbers — every value is a --cd-* custom property
ASW Semantic: surface layers, grid overlays, data-attribute API
========================================================================== */
@import "https://unpkg.com/open-props";
/* ==========================================================================
1. Custom Properties — All --cd-* Tokens
Components MUST NOT reference Open Props directly.
Users override these on :root or a scoped container to theme.
========================================================================== */
:root {
/* ═══════════════════════════════════════════════════════════════════════
Physical CD Dimensions (at 2× scale, ISO 15727)
Formula: calc(<mm> * 2px / 1mm) = <px>
═══════════════════════════════════════════════════════════════════════ */
--cd-scale: 1;
/* --cd-scale: 1 = default 2× display scale. 0.5 = 1×, 2 = 4×, etc. */
--cd-jewel-width: calc(280px * var(--cd-scale)); /* 142 mm × 2 */
--cd-jewel-height: calc(245px * var(--cd-scale)); /* 125 mm × 2 */
--cd-jewel-open-width: calc(560px * var(--cd-scale)); /* 284 mm × 2 */
--cd-disc-diameter: calc(240px * var(--cd-scale)); /* 120 mm × 2 */
--cd-disc-hole: calc(30px * var(--cd-scale)); /* Ø15 mm × 2 */
--cd-leaflet-size: calc(240px * var(--cd-scale)); /* 120 mm sq × 2 */
--cd-spine-width: calc(14px * var(--cd-scale)); /* ~7 mm × 2 */
--cd-tray-width: calc(260px * var(--cd-scale)); /* ~130 mm × 2 */
/* ── Derived aspect ratios ── */
--cd-aspect-jewel: 280 / 245;
--cd-aspect-leaflet: 1 / 1;
--cd-aspect-disc: 1 / 1;
/* ═══════════════════════════════════════════════════════════════════════
Surface Colors (ASW-style, oklch — NOT from Open Props)
═══════════════════════════════════════════════════════════════════════ */
--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 */
/* ── Surface 0 — lightest, used for jewel case body & leaflet pages ── */
--cd-surface-0: var(--gray-0);
/* ═══════════════════════════════════════════════════════════════════════
Typography
═══════════════════════════════════════════════════════════════════════ */
--cd-font-neo-grotesque: 'Inter', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
--cd-font-label: var(--cd-font-neo-grotesque); /* spine, metadata, credits */
--cd-font-body: var(--font-serif); /* leaflet prose */
--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);
/* ── Font weights ── */
--cd-font-weight-semibold: 600;
/* ── Spine font sizes ── */
--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);
/* ═══════════════════════════════════════════════════════════════════════
Spacing
═══════════════════════════════════════════════════════════════════════ */
--cd-space-inset: var(--size-fluid-1);
--cd-space-stack: var(--size-fluid-2);
--cd-space-gutter: var(--size-fluid-3);
--cd-space-xs: var(--size-1); /* 45px */
--cd-space-sm: var(--size-2); /* 810px */
/* ═══════════════════════════════════════════════════════════════════════
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);
--cd-text-opacity-muted: 0.8;
/* ═══════════════════════════════════════════════════════════════════════
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)
═══════════════════════════════════════════════════════════════════════ */
--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);
--cd-advisory-fg: #000;
--cd-advisory-fg-inv: #fff;
--cd-advisory-border: 2px solid var(--cd-advisory-fg);
--cd-advisory-font: 'Impact', 'Arial Black', var(--cd-font-label), sans-serif;
/* ═══════════════════════════════════════════════════════════════════════
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 */
/* ═══════════════════════════════════════════════════════════════════════
Component Shadows (all rgba/rgb values defined here, not inline)
═══════════════════════════════════════════════════════════════════════ */
--cd-page-shadow: 0 1px 3px rgb(0 0 0 / 0.08);
--cd-disc-hole-shadow: inset 0 0 3px rgb(0 0 0 / 0.15);
--cd-disc-shadow: inset 0 0 8px rgb(0 0 0 / 0.12);
/* ═══════════════════════════════════════════════════════════════════════
Borders & Dividers
═══════════════════════════════════════════════════════════════════════ */
--cd-tray-border-top: 1px solid var(--cd-grid-color);
--cd-track-border-bot: 1px solid var(--cd-grid-color-alt);
--cd-track-num-min-w: 2.5ch;
--cd-print-border: 1px solid #ccc;
/* ═══════════════════════════════════════════════════════════════════════
Letter Spacing Scale
═══════════════════════════════════════════════════════════════════════ */
--cd-letter-spacing-1: 0.05em;
--cd-letter-spacing-2: 0.075em;
--cd-letter-spacing-3: 0.1em;
/* ═══════════════════════════════════════════════════════════════════════
Motion & Easing
═══════════════════════════════════════════════════════════════════════ */
--cd-transition-duration: 200ms;
--cd-ease-flip: cubic-bezier(0.34, 1.56, 0.64, 1);
--cd-ease-default: var(--ease-3);
/* ═══════════════════════════════════════════════════════════════════════
Print Dimensions
═══════════════════════════════════════════════════════════════════════ */
--cd-print-jewel-width: 142mm;
--cd-print-jewel-height: 125mm;
/* ═══════════════════════════════════════════════════════════════════════
Grain Texture
═══════════════════════════════════════════════════════════════════════ */
--cd-grain-size-1: 120px;
--cd-grain-size-2: 200px;
--cd-grain-opacity-1: 0.02;
--cd-grain-opacity-2: 0.015;
/* ═══════════════════════════════════════════════════════════════════════
Responsive Breakpoints (container query widths)
═══════════════════════════════════════════════════════════════════════ */
--cd-break-sm: 350px;
--cd-break-md-min: 351px;
--cd-break-md-max: 549px;
/* ═══════════════════════════════════════════════════════════════════════
Disc Decoration Ratios
═══════════════════════════════════════════════════════════════════════ */
--cd-disc-hole-scale: 0.6; /* decorative ring inside the hole */
--cd-disc-hole-font-scale: 0.5; /* icon character in the hole */
/* ═══════════════════════════════════════════════════════════════════════
Z-Index Stacking
═══════════════════════════════════════════════════════════════════════ */
--cd-z-stack-base: 1; /* disc hole above disc art */
}
/* ==========================================================================
2. Reset
========================================================================== */
*, *::before, *::after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
/* ==========================================================================
3. Jewel Case Container (.cd-jewel-case)
========================================================================== */
.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(--cd-surface-0);
border-radius: var(--cd-jewel-radius);
box-shadow: var(--cd-jewel-shadow);
overflow: hidden;
position: relative;
transition: width var(--cd-transition-duration) var(--cd-ease-default);
font-family: var(--cd-font-body);
color: var(--cd-text-primary);
container-type: inline-size;
}
.cd-jewel-case--open,
.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, .spine-label, .spine-track)
========================================================================== */
.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(--cd-space-sm) var(--cd-space-xs);
gap: var(--cd-space-sm);
writing-mode: vertical-rl;
text-orientation: mixed;
user-select: none;
}
.cd-spine .spine-label {
font-size: var(--cd-spine-font-sm);
font-weight: var(--cd-font-weight-semibold);
letter-spacing: var(--cd-letter-spacing-3);
text-transform: uppercase;
}
.cd-spine .spine-track {
font-size: var(--cd-spine-font-xs);
letter-spacing: var(--cd-letter-spacing-1);
opacity: var(--cd-text-opacity-muted);
}
/* ── Side spine variant ── */
.cd-spine--side {
writing-mode: horizontal-tb;
flex-direction: row;
}
/* ==========================================================================
5. Leaflet Content & Pages (.leaflet-content, .leaflet-page)
========================================================================== */
.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(--cd-surface-0);
border-radius: calc(var(--cd-leaflet-radius) / 2);
padding: var(--cd-space-inset);
display: flex;
flex-direction: column;
gap: var(--cd-space-sm);
box-shadow: var(--cd-page-shadow);
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, .disc-hole)
========================================================================== */
.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: var(--cd-disc-shadow);
}
.disc-art::before {
content: "";
position: absolute;
width: var(--cd-disc-hole);
aspect-ratio: 1;
border-radius: 50%;
background: var(--cd-surface-0);
box-shadow: var(--cd-disc-hole-shadow);
}
.disc-hole {
position: absolute;
width: calc(var(--cd-disc-hole) * var(--cd-disc-hole-scale));
aspect-ratio: 1;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-size: calc(var(--cd-disc-hole) * var(--cd-disc-hole-font-scale));
color: var(--gray-4);
z-index: var(--cd-z-stack-base);
pointer-events: none;
}
/* ── Disc sheen variant ── */
.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)
========================================================================== */
.human-advisory {
display: flex;
flex-direction: column;
align-items: center;
background: var(--cd-advisory-fg);
color: var(--cd-advisory-fg-inv);
border: var(--cd-advisory-border);
font-family: var(--cd-advisory-font);
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(--cd-space-xs) var(--cd-space-sm);
font-size: var(--cd-spine-font-sm);
letter-spacing: var(--cd-letter-spacing-3);
line-height: 1.2;
white-space: nowrap;
}
.human-advisory .advisory-row--black {
background: var(--cd-advisory-fg);
color: var(--cd-advisory-fg-inv);
}
.human-advisory .advisory-row--white {
background: var(--cd-advisory-fg-inv);
color: var(--cd-advisory-fg);
}
.human-advisory .advisory-row--red {
background: var(--cd-advisory-red);
color: var(--cd-advisory-fg-inv);
}
/* ── Advisory badge red variant ── */
.human-advisory--red .advisory-row--black {
background: var(--cd-advisory-red-dark);
color: var(--cd-advisory-fg-inv);
}
.human-advisory--red .advisory-row--white {
background: var(--cd-advisory-red);
color: var(--cd-advisory-fg-inv);
}
/* ==========================================================================
8. Back Tray (.back-tray, .tray-credits)
========================================================================== */
.back-tray {
display: grid;
grid-template-columns: var(--cd-spine-width) 1fr var(--cd-spine-width);
background: var(--cd-tray-bg);
border-top: var(--cd-tray-border-top);
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(--cd-letter-spacing-2);
}
.tray-credits ol {
list-style: none;
counter-reset: track;
display: flex;
flex-direction: column;
gap: var(--cd-space-xs);
}
.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(--cd-space-xs) 0;
border-bottom: var(--cd-track-border-bot);
display: flex;
gap: var(--cd-space-sm);
}
.tray-credits ol li::before {
content: counter(track, decimal-leading-zero) ".";
font-family: var(--cd-font-mono);
color: var(--cd-text-muted);
min-width: var(--cd-track-num-min-w);
}
.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(--cd-letter-spacing-1);
}
.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)
========================================================================== */
.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 (container queries)
========================================================================== */
@container (max-width: var(--cd-break-sm)) {
.cd-jewel-case {
width: 100% !important;
grid-template-columns: 1fr;
}
.cd-spine {
writing-mode: horizontal-tb;
flex-direction: row;
padding: var(--cd-space-xs) var(--cd-space-sm);
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: var(--cd-break-md-min)) and (max-width: var(--cd-break-md-max)) {
.cd-jewel-case {
width: 100% !important;
max-width: var(--cd-jewel-width);
}
.leaflet-content {
gap: var(--cd-space-sm);
}
.human-advisory .advisory-row {
font-size: var(--cd-spine-font-xs);
padding: var(--cd-space-xs) var(--cd-space-sm);
}
}
/* ==========================================================================
12. Print Styles
========================================================================== */
@media print {
.cd-jewel-case {
width: var(--cd-print-jewel-width);
height: var(--cd-print-jewel-height);
box-shadow: none;
border: var(--cd-print-border);
}
.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)
========================================================================== */
.cd-grain {
background-image:
repeating-radial-gradient(
circle at 50% 50%,
transparent 0 1px,
rgb(0 0 0 / var(--cd-grain-opacity-1)) 1px 2px,
transparent 2px 4px
),
repeating-radial-gradient(
circle at 100% 100%,
transparent 0 3px,
rgb(0 0 0 / var(--cd-grain-opacity-2)) 3px 4px,
transparent 4px 8px
);
background-size: var(--cd-grain-size-1) var(--cd-grain-size-1),
var(--cd-grain-size-2) var(--cd-grain-size-2);
}