/* ============================================================
   SIDEWALK — a journal of everyday city life
   Editorial / Swiss-modernist system
   ============================================================ */

@font-face {
  font-family: "DM Serif Display";
  src: url("assets/dm-serif.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Literata";
  src: url("assets/literata.ttf") format("truetype");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("assets/dm-sans.ttf") format("truetype");
  font-weight: 100 1000;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/ibm-plex-mono.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #faf8f3;
  --ink: #171512;
  --ink-soft: #57534e;
  --ink-faint: #6b6459;
  --line: #dcd6ca;
  --line-strong: #171512;
  --card: #fffdf9;
  --accent: #b33412;      /* vermilion, 5.8:1 on paper */
  --accent-deep: #8a260c;
  --wash: #f1ece1;
  --shadow: 0 1px 2px rgba(23, 21, 18, 0.06), 0 8px 24px rgba(23, 21, 18, 0.07);

  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --font-body: "Literata", Georgia, serif;
  --font-ui: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --step-1: clamp(0.95rem, 0.93rem + 0.15vw, 1.05rem);
  --radius: 4px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--step-1);
  line-height: 1.55;
}

.shell {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2.5rem);
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

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

.skip-link {
  position: absolute;
  left: 1rem; top: -4rem;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 1rem; }

.icon { width: 1.1em; height: 1.1em; flex: none; }

/* ---------- Masthead ---------- */

.masthead {
  border-bottom: 3px solid var(--line-strong);
  background: var(--paper);
}

.masthead-inner {
  text-align: center;
  padding-top: clamp(1.75rem, 4vw, 3rem);
  padding-bottom: clamp(1rem, 2.5vw, 1.75rem);
}

.masthead-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

.masthead-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3rem, 10vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
  margin: 0;
}

.masthead-tag {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--ink-soft);
  margin: 0.9rem 0 0;
  font-size: 1.05rem;
}

.masthead-nav {
  border-top: 1px solid var(--line);
  margin-top: clamp(1.25rem, 3vw, 2rem);
  padding-top: 0;
  padding-bottom: 0;
}
.masthead-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
}
.masthead-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 1rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.masthead-nav a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.masthead-nav a:active { color: var(--accent-deep); }

/* ---------- Toolbar ---------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.75rem;
  padding-block: 1.25rem 0.5rem;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.field {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: var(--card);
  padding: 0 0.85rem;
  min-height: 46px;
  transition: box-shadow 0.15s ease;
}
.field:focus-within { box-shadow: 3px 3px 0 var(--accent); }

.field-search { flex: 1 1 240px; }
.field-search .icon { color: var(--ink-soft); }

.field-search input {
  border: 0;
  background: transparent;
  font: inherit;
  color: var(--ink);
  width: 100%;
  min-height: 44px;
  padding: 0;
}
.field-search input:focus { outline: none; }
.field-search input::placeholder { color: var(--ink-faint); }

.field-filter { flex: 0 1 auto; }
.field-filter label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  white-space: nowrap;
}
.field-filter select {
  border: 0;
  background: transparent;
  font: inherit;
  color: var(--ink);
  min-height: 44px;
  padding-right: 0.25rem;
  cursor: pointer;
}
.field-filter select:focus { outline: none; }

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  background: var(--card);
  min-height: 46px;
  padding: 0 1rem;
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.toggle:hover { box-shadow: 3px 3px 0 var(--accent); }
.toggle:active { transform: translateY(1px); }
.toggle[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.toggle .count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0 0.45em;
  line-height: 1.5;
}

/* ---------- List ---------- */

.list-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}
.list-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0;
}
.list-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin: 0;
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-block: 1.25rem 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card.is-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  border: 0;
  border-top: 3px solid var(--line-strong);
  border-bottom: 3px solid var(--line-strong);
  background: var(--wash);
}

.card-media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--wash);
}
.card.is-featured .card-media { aspect-ratio: auto; min-height: 300px; height: 100%; }
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.card:hover .card-media img { transform: scale(1.03); }

.card-body {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.1rem 1.2rem 1.25rem;
  flex: 1;
}
.card.is-featured .card-body {
  justify-content: center;
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

.card-title {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.12;
  margin: 0;
  font-size: 1.45rem;
}
.card.is-featured .card-title { font-size: clamp(1.8rem, 3.6vw, 2.9rem); }

.card-summary {
  font-family: var(--font-body);
  color: var(--ink-soft);
  margin: 0;
  font-size: 0.98rem;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: auto;
  padding-top: 0.4rem;
}

.card .btn { margin-top: 0.5rem; align-self: flex-start; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  border: 1.5px solid var(--ink);
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { box-shadow: 3px 3px 0 var(--accent); }
.btn:active { transform: translateY(1px); box-shadow: 1px 1px 0 var(--accent); }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { box-shadow: none; color: var(--accent); }

.btn-save[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-save[aria-pressed="true"]:hover { box-shadow: 3px 3px 0 var(--accent-deep); }
.btn-save .icon-bookmark { fill: none; }
.btn-save[aria-pressed="true"] .icon-bookmark { fill: currentColor; }

/* ---------- Empty state ---------- */

.empty-state {
  text-align: center;
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--card);
  padding: clamp(2rem, 6vw, 3.5rem) 1.5rem;
  margin: 0.5rem 0 3.5rem;
}
.empty-state h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.6rem;
  margin: 0 0 0.5rem;
}
.empty-state p {
  font-family: var(--font-body);
  color: var(--ink-soft);
  max-width: 42ch;
  margin: 0 auto 1.4rem;
}

/* ---------- Detail sheet ---------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: end stretch;
}
.overlay[hidden] { display: none; }

.sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(23, 21, 18, 0.55);
}

.sheet {
  position: relative;
  width: min(760px, 100%);
  max-height: min(92dvh, 100%);
  margin-inline: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 6px 6px 0 0;
  box-shadow: 0 -12px 40px rgba(23, 21, 18, 0.25);
  display: flex;
  flex-direction: column;
  animation: sheet-in 0.28s ease;
}

@keyframes sheet-in {
  from { transform: translateY(24px); opacity: 0.4; }
  to   { transform: translateY(0); opacity: 1; }
}

.sheet-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem clamp(1rem, 3vw, 1.75rem);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 2;
}

.sheet-body { overflow-y: auto; padding: clamp(1.25rem, 4vw, 2.5rem) clamp(1rem, 4vw, 2.75rem) 2.5rem; }

.sheet-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.sheet-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  line-height: 1.08;
  margin: 0 0 1rem;
}

.sheet-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.65rem 0;
  margin: 0 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.4rem;
}

.sheet-summary {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 1.12rem;
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
}

.sheet-article p {
  font-family: var(--font-body);
  font-size: 1.06rem;
  line-height: 1.75;
  margin: 0 0 1.2rem;
}

.sheet-article p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 3.1em;
  float: left;
  line-height: 0.85;
  padding-right: 0.08em;
  color: var(--accent);
}

.sheet-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
  margin-top: 1.75rem;
}

/* ---------- Colophon ---------- */

.colophon {
  border-top: 3px solid var(--line-strong);
  background: var(--wash);
  margin-top: 1rem;
}
.colophon-inner { padding-block: 2rem 2.5rem; }
.colophon-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 0.5rem;
}
.colophon p { margin: 0 0 0.5rem; max-width: 60ch; color: var(--ink-soft); }
.colophon-fine { font-size: 0.82rem; color: var(--ink-faint); }

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .story-grid { grid-template-columns: repeat(2, 1fr); }
  .card.is-featured { grid-template-columns: 1fr; }
  .card.is-featured .card-media { min-height: 220px; }
}

@media (max-width: 640px) {
  .story-grid { grid-template-columns: 1fr; gap: 1.15rem; }
  .toolbar { gap: 0.6rem; }
  .field-search { flex-basis: 100%; order: -1; }
  .field-filter { flex: 1; }
  .toggle { flex: 1; justify-content: center; }
  .overlay { place-items: end stretch; }
  .sheet { max-height: 94dvh; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .card:hover { transform: none; }
  .card:hover .card-media img { transform: none; }
}