shared-ui.css

/* Shared design-system primitives for both the app UI and RSS/XSL surfaces. See docs/design-system.md before changing this file. */
:root {
  color-scheme: dark;

  --font-family-ui: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-family-display: georgia, serif;
  --font-family-mono: "SFMono-Regular", consolas, "Liberation Mono", monospace;
  --font-size-00: 0.8125rem;
  --font-size-0: 0.9375rem;
  --font-size-1: 1rem;
  --font-size-2: 1.125rem;
  --line-height-tight: 1.1;
  --line-height-base: 1.5;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --border-width: 1px;
  --radius-pill: 999px;
  --border-default: var(--border-width) solid var(--border-subtle);
  --radius-md: var(--space-3);
  --radius-lg: 1rem;
  --motion-nudge: 0.04rem;
  --layout-field-max-width: 38rem;
  --eyebrow-letter-spacing: 0.08em;
  --letter-spacing-meta: 0.05em;
  --letter-spacing-display: -0.03em;
  --letter-spacing-title: -0.01em;
  --brand-lockup-gap: 0.3rem;
  --brand-lockup-mark-size: 1.7rem;
  --brand-lockup-mark-padding: 0.3rem;
  --brand-lockup-mark-gap: 0.18rem;
  --brand-lockup-mark-radius: 0.45rem;
  --brand-lockup-line-1-height: 0.22rem;
  --brand-lockup-line-2-width: 70%;
  --brand-lockup-line-3-width: 46%;
  --brand-lockup-wordmark-size: 0.96rem;
  --color-rgb-white: 255 255 255;
  --color-rgb-black: 0 0 0;
  --color-rgb-text: 243 243 239;
  --color-rgb-success: 110 231 183;
  --color-rgb-danger: 248 113 113;
  --color-rgb-reader: 255 147 0;
  --bg-success: rgb(var(--color-rgb-success) / 8%);
  --bg-danger: rgb(var(--color-rgb-danger) / 10%);
  --border-success: rgb(var(--color-rgb-success) / 20%);
  --border-danger: rgb(var(--color-rgb-danger) / 20%);
  --surface-reader-strong: rgb(var(--color-rgb-reader) / 12%);
  --border-reader-strong: rgb(var(--color-rgb-reader) / 24%);
  --overlay-top-light: rgb(var(--color-rgb-white) / 4%);
  --overlay-icon-top: rgb(var(--color-rgb-white) / 8%);
  --overlay-icon-base: rgb(var(--color-rgb-white) / 3%);
  --overlay-scrim: rgb(var(--color-rgb-black) / 64%);
  --canvas: #080808;
  --surface-base: rgb(var(--color-rgb-white) / 2%);
  --surface-elevated: var(--overlay-top-light);
  --surface-chip: rgb(var(--color-rgb-white) / 2.5%);
  --border-muted: rgb(var(--color-rgb-white) / 12%);
  --border-subtle: rgb(var(--color-rgb-white) / 8%);
  --border-strong: rgb(var(--color-rgb-white) / 24%);
  --border-chip: rgb(var(--color-rgb-white) / 8%);
  --text-strong: #f3f3ef;
  --text-body: rgb(var(--color-rgb-text) / 90%);
  --text-muted: rgb(var(--color-rgb-text) / 58%);
  --text-soft: rgb(var(--color-rgb-text) / 76%);
  --text-faint: rgb(var(--color-rgb-text) / 28%);
  --eyebrow-color: rgb(var(--color-rgb-white) / 72%);
  --text-inverse: #050505;
  --accent: #f3f3ef;
  --accent-strong: #fff;
  --danger: #fca5a5;
  --focus-ring: 0 0 0 3px rgb(var(--color-rgb-white) / 16%);
  --shadow-elevated: 0 24px 60px rgb(var(--color-rgb-black) / 32%);
  --layout-page-max-width: 60rem;
  --layout-rail-shell: 58rem;
  --layout-rail-reading: 44rem;
  --layout-rail-copy: 34rem;
  --section-gap-tight: var(--space-4);
  --section-gap: var(--space-5);
  --transition-fast: 140ms ease;
  --font-weight-semibold: 600;
  --font-weight-medium: 500;
}

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

html,
body {
  min-height: 100%;
}

html {
  background:
    radial-gradient(circle at top, var(--overlay-top-light), transparent 32%),
    linear-gradient(180deg, var(--canvas) 0%, #040404 100%);
}

body {
  margin: 0;
  min-width: 20rem;
  color: var(--text-body);
  background: transparent;
}

body,
button,
input,
select,
textarea {
  font-family: var(--font-family-ui);
  font-size: var(--font-size-0);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizelegibility;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

a:focus-visible {
  outline: none;
  text-decoration: underline;
  text-underline-offset: 0.16em;
  box-shadow: var(--focus-ring);
  border-color: var(--border-strong);
}

button,
input,
select,
textarea {
  margin: 0;
}

.layout-shell {
  width: min(100%, var(--layout-rail-shell));
  margin: 0 auto;
}

.layout-shell-padding {
  padding:
    clamp(0.85rem, 3vh, 2rem)
    clamp(var(--space-3), 3vw, var(--space-4))
    var(--layout-shell-padding-bottom, var(--space-5));
}

.layout-rail-reading {
  width: min(100%, var(--layout-rail-reading));
  margin: 0 auto;
}

.layout-rail-copy {
  max-width: var(--layout-rail-copy);
}

.layout-stack {
  display: grid;
  gap: var(--stack-gap, var(--space-4));
}

.layout-stack--tight {
  --stack-gap: var(--space-3);
}

.layout-section-divided {
  justify-items: start;
  padding-top: var(--space-4);
  border-top: var(--border-width) solid var(--border-subtle);
}

.ui-headline-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: start;
}

.ui-meta-row {
  display: grid;
  grid-template-columns: minmax(6rem, max-content) 1fr;
  gap: var(--space-2);
  align-items: baseline;
}

.ui-card {
  border: var(--border-default);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, var(--overlay-top-light), transparent),
    var(--surface-base);
}

.ui-card--padded {
  padding: clamp(var(--space-3), 4vw, var(--space-4));
}

.ui-card--roomy {
  padding: clamp(var(--space-4), 5vw, var(--space-6));
}

.ui-card--notice {
  border-radius: var(--radius-md);
}

.ui-card--framed {
  box-shadow: var(--shadow-elevated);
}

.ui-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.ui-display-title {
  margin: 0;
  color: var(--text-strong);
  font-family: var(--font-family-display);
  font-size: clamp(1.9rem, 4.2vw, 2.85rem);
  line-height: 0.98;
  letter-spacing: var(--letter-spacing-display);
}

.ui-lede {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--font-size-1);
}

.ui-eyebrow {
  margin: 0;
  color: var(--eyebrow-color);
  font-size: var(--font-size-00);
  letter-spacing: var(--eyebrow-letter-spacing);
  text-transform: uppercase;
  font-weight: var(--font-weight-semibold);
}

.ui-eyebrow--ghost {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.ui-item-list {
  display: grid;
  width: 100%;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-width) solid var(--border-subtle);
}

.ui-item {
  min-width: 0;
  padding: var(--space-3) 0;
  border-bottom: var(--border-width) solid var(--border-subtle);
}

.ui-item__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--font-size-00);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
  font-weight: var(--font-weight-medium);
}

.ui-item__title {
  margin: 0;
  color: var(--text-strong);
  font-family: var(--font-family-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.25;
  letter-spacing: var(--letter-spacing-title);
  overflow-wrap: break-word;
}

.ui-item__title a {
  color: inherit;
  text-decoration: none;
}

.ui-item__title a:hover,
.ui-item__title a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.ui-item__excerpt {
  margin: 0;
  color: var(--text-body);
  font-size: var(--font-size-0);
  line-height: 1.45;
  overflow-wrap: break-word;
}

.input {
  width: 100%;
  min-width: 0;
  padding: var(--space-4);
  border: var(--border-width) solid var(--border-muted);
  border-radius: var(--radius-pill);
  background: var(--surface-elevated);
  color: var(--text-strong);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.input::placeholder {
  color: var(--text-faint);
}

.input:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-color: var(--border-strong);
}

.input--mono {
  font-family: var(--font-family-mono);
}

.input--lg {
  min-height: var(--control-input-lg-min-height, 4.5rem);
  padding-inline: var(--control-input-lg-padding-inline, 1.25rem 5rem);
  font-size: var(--control-input-lg-font-size, clamp(1.05rem, 2.3vw, 1.5rem));
  letter-spacing: var(--control-input-lg-letter-spacing, var(--letter-spacing-display));
}

.input:disabled {
  cursor: not-allowed;
}

.btn {
  min-height: 3rem;
  padding: 0 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-strong);
  text-decoration: none;
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    opacity var(--transition-fast);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-color: var(--border-strong);
}

.btn:hover:not(:disabled) {
  transform: translateY(calc(var(--motion-nudge) * -1));
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: var(--text-inverse);
}

.btn--primary:hover:not(:disabled) {
  background: var(--accent-strong);
}

.btn--ghost {
  border-color: var(--border-subtle);
  background: var(--surface-elevated);
}

.btn--ghost:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--border-subtle);
}

.btn--quiet,
.btn--linkish {
  min-height: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--eyebrow-color);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-00);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
}

.btn--quiet:hover:not(:disabled),
.btn--linkish:hover:not(:disabled) {
  background: transparent;
  color: var(--text-strong);
}

.brand-lockup {
  display: grid;
  width: max-content;
  margin-inline: auto;
  justify-items: center;
  gap: var(--brand-lockup-gap);
  text-decoration: none;
}

.brand-lockup__mark {
  width: var(--brand-lockup-mark-size);
  height: var(--brand-lockup-mark-size);
  padding: var(--brand-lockup-mark-padding);
  display: grid;
  gap: var(--brand-lockup-mark-gap);
  border: var(--border-width) solid var(--border-muted);
  border-radius: var(--brand-lockup-mark-radius);
  background: transparent;
}

.brand-lockup__mark span {
  display: block;
  background: var(--accent);
}

.brand-lockup__mark span:nth-child(1) {
  width: 100%;
  height: var(--brand-lockup-line-1-height);
}

.brand-lockup__mark span:nth-child(2) {
  width: var(--brand-lockup-line-2-width);
  height: var(--brand-lockup-line-1-height);
}

.brand-lockup__mark span:nth-child(3) {
  width: var(--brand-lockup-line-3-width);
  height: var(--brand-lockup-line-1-height);
}

.brand-lockup__wordmark {
  color: var(--text-strong);
  font-family: var(--font-family-display);
  font-size: var(--brand-lockup-wordmark-size);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.01em;
}

@media (width < 48rem) {
  .ui-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }
}