/* Curbline: editorial index and reader.
   Type: system sans for interface and headlines, system serif only for article body text.
   Accent: one deep green, used for focus, pressed state, and category labels. */

:root {
  --paper: #f5f5f2;
  --ink: #17191c;
  --muted: #565c63;
  --field-border: #7a8079;
  --rule: #d8dbd5;
  --accent: #1d5e4b;
  --on-accent: #f5f5f2;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: Charter, "Iowan Old Style", Georgia, serif;
  --gutter: clamp(16px, 4vw, 48px);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121412;
    --ink: #e9ebe6;
    --muted: #a7ada5;
    --field-border: #8d948c;
    --rule: #2c312c;
    --accent: #8bcbb0;
    --on-accent: #10201a;
  }
}

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

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.5;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: -9999px;
  padding: 10px 14px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}

.skip-link:focus {
  left: 12px;
}

/* Masthead */

.masthead {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(32px, 6vw, 72px) var(--gutter) 28px;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  margin: 0;
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.deck {
  margin: 16px 0 0;
  max-width: 34ch;
  color: var(--muted);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.3;
}

/* Page and controls */

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px var(--gutter) 96px;
}

.controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px auto;
  gap: 16px;
  align-items: end;
}

.field {
  display: grid;
  gap: 8px;
}

label {
  font-size: 0.9375rem;
  font-weight: 600;
}

input,
select {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1.5px solid var(--field-border);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
}

.btn {
  min-height: 48px;
  padding: 0 20px;
  border: 1.5px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn:active {
  transform: scale(0.98);
}

.btn[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.result-count {
  margin: 20px 0 40px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.load-error {
  margin: 0 0 32px;
  font-weight: 600;
}

/* Story index */

.index {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.entry.is-wide {
  grid-column: 1 / -1;
}

.skeleton {
  height: 180px;
  background: var(--rule);
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.875rem;
}

.entry-meta .cat {
  color: var(--accent);
  font-weight: 700;
}

.entry-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.entry.is-lead .entry-title {
  font-size: clamp(2rem, 4.2vw, 3.5rem);
  letter-spacing: -0.025em;
  line-height: 1.02;
}

.open-item {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.14em;
  cursor: pointer;
}

.open-item:hover {
  color: var(--accent);
}

.entry-summary {
  max-width: 52ch;
  margin: 12px 0 0;
  font-size: 1.0625rem;
}

.entry.is-lead .entry-summary {
  max-width: 40ch;
  font-size: 1.25rem;
}

.entry-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.saved-mark {
  color: var(--accent);
  font-weight: 700;
}

.empty {
  max-width: 46ch;
  padding: 48px 0;
}

.empty h3 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.empty p {
  margin: 0 0 20px;
  color: var(--muted);
}

/* Story detail */

.story {
  max-width: 720px;
}

.story-bar {
  margin-bottom: 40px;
}

.story-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.story-meta .cat {
  color: var(--accent);
  font-weight: 700;
}

.story-title {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.06;
}

.story-title:focus {
  outline: none;
}

.story-deck {
  max-width: 36ch;
  margin: 0 0 20px;
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  line-height: 1.4;
}

.story-byline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.story-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin: 28px 0 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
}

.save-status {
  min-height: 1.5em;
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.story-body {
  max-width: 65ch;
  font-family: var(--serif);
  font-size: 1.1875rem;
  line-height: 1.65;
}

.story-body p {
  margin: 0 0 1.1em;
}

/* Footer */

.colophon {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px var(--gutter) 40px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.875rem;
}

.colophon p {
  margin: 0;
}

/* Tablet and up */

@media (min-width: 900px) {
  .index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
    row-gap: 56px;
  }
}

/* Mobile */

@media (max-width: 767px) {
  .controls {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .btn.toggle {
    width: 100%;
  }

  .result-count {
    margin: 16px 0 28px;
  }

  .index {
    gap: 36px;
  }

  .entry-title {
    font-size: 1.375rem;
  }

  .story-bar {
    margin-bottom: 28px;
  }

  .story-body {
    font-size: 1.125rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}