/* ============================================================
   NIGHT SIGNAL — dark transit-inspired city journal
   ============================================================ */

@font-face {
  font-family: "Space Grotesk";
  src: url("assets/space-grotesk.ttf") format("truetype");
  font-weight: 300 700;
  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 {
  --bg: #0b0d12;
  --bg-raise: #12151d;
  --bg-hover: #171b25;
  --line: #262b38;
  --line-soft: #1a1e29;
  --control-line: #5b6478;
  --text: #e9edf2;
  --text-dim: #9aa3b2;
  --text-faint: #7d8694;
  --accent: #ffb525;
  --accent-ink: #1a1204;

  /* metro line colors per section */
  --line-places: #7ed9a4;
  --line-food: #ff8a3d;
  --line-movement: #45c4e8;
  --line-people: #ff6b9d;
  --line-culture: #c792ea;

  --font-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --font-body: "DM Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;

  --shell: 1240px;
  --radius: 4px;
}

* { box-sizing: border-box; }

html {
  scroll-padding-top: 140px;
}

html.dialog-open { overflow: hidden; }

body {
  margin: 0;
  background-color: var(--bg);
  /* faint Swiss-grid column lines */
  background-image: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.022) 0,
    rgba(255, 255, 255, 0.022) 1px,
    transparent 1px,
    transparent 120px
  );
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 40px;
}

.accent { color: var(--accent); }

.icon {
  width: 1.05em;
  height: 1.05em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.15em;
  flex: none;
}

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

button:active:not(:disabled) {
  transform: translateY(1px);
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* ============================ Masthead ============================ */

.masthead {
  border-bottom: 1px solid var(--line);
}

.masthead-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.masthead-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.masthead-main {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 24px;
  padding: 26px 0 36px;
}

.masthead-kicker {
  grid-column: 1 / -1;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.masthead-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(42px, 7vw, 100px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  white-space: nowrap;
}

.pulse-dot {
  display: inline-block;
  width: 0.16em;
  height: 0.16em;
  margin-left: 0.12em;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 0.62em;
}

@media (prefers-reduced-motion: no-preference) {
  .pulse-dot { animation: pulse 2.6s ease-in-out infinite; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(255, 181, 37, 0.45); }
  50% { opacity: 0.55; box-shadow: 0 0 0 0.14em rgba(255, 181, 37, 0); }
}

.masthead-blurb {
  max-width: 340px;
  padding-left: 18px;
  border-left: 2px solid var(--accent);
}

.masthead-blurb p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.signal-mark {
  display: block;
  width: 34px;
  margin-bottom: 14px;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  fill: none;
}
.signal-mark circle { fill: var(--accent); stroke: none; }

/* ============================ Controls ============================ */

.controls {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11, 13, 18, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 210px auto;
  grid-template-areas:
    "search select saved"
    "status status status";
  align-items: end;
  gap: 10px 22px;
  padding-top: 16px;
  padding-bottom: 8px;
}

.control-search { grid-area: search; }
.control:nth-child(2) { grid-area: select; }
.control:nth-child(3) { grid-area: saved; }

.control-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.controls input,
.controls select {
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  background: var(--bg-raise);
  border: 1px solid var(--control-line);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

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

.controls input:hover,
.controls select:hover { border-color: #77809a; }

.controls input:focus,
.controls select:focus {
  border-color: var(--accent);
}

.controls select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 38px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23ffb525' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 12px;
  cursor: pointer;
}

.controls input[type="search"]::-webkit-search-cancel-button { opacity: 0.4; }

.saved-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 10px 16px;
  background: var(--bg-raise);
  border: 1px solid var(--control-line);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.saved-toggle:hover {
  border-color: #77809a;
  color: var(--text);
  background: var(--bg-hover);
}

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

.saved-toggle[aria-pressed="true"]:active {
  filter: brightness(0.9);
  transform: none;
}

.count-chip {
  min-width: 22px;
  padding: 1px 6px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 12px;
  text-align: center;
}

.results-status {
  grid-area: status;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ============================ Story board ============================ */

.board {
  margin: 0;
  padding: 0 0 72px;
  list-style: none;
}

.board[hidden] { display: none; }

.story {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid var(--story-line, var(--line));
  background-clip: padding-box;
  transition: background-color 0.18s ease;
}

.story:hover { background: var(--bg-raise); }

.story-open {
  flex: 1;
  display: grid;
  grid-template-columns: 62px 1fr 232px;
  gap: 24px;
  align-items: center;
  padding: 26px 20px 26px 18px;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
}

.story-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  transition: color 0.18s ease;
  align-self: start;
  padding-top: 4px;
}

.story:hover .story-num { color: var(--accent); }

.story-text { min-width: 0; display: grid; gap: 7px; }

.story-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.line-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--story-line, var(--line));
  color: #10131a;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  flex: none;
}

.story-kicker .sep { color: var(--text-faint); }

.saved-tag {
  padding: 1px 7px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  font-size: 11px;
  line-height: 1.5;
}

.story-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 25px;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
  transition: color 0.18s ease;
}

.story:hover .story-title { color: var(--accent); }

.story-summary {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-dim);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.story-thumb {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--bg-raise);
}

.story-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.duotone {
  filter: grayscale(1) contrast(1.06) brightness(0.88) sepia(0.55)
    hue-rotate(-16deg) saturate(2.1);
}

/* ============================ Empty state ============================ */

.empty {
  padding: 90px 24px 110px;
  text-align: center;
}

.empty-code {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--text-faint);
}

.empty-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 32px;
  letter-spacing: -0.01em;
}

.empty-text {
  margin: 0 0 28px;
  color: var(--text-dim);
}

.empty-reset {
  min-height: 48px;
  padding: 12px 26px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: filter 0.18s ease;
}

.empty-reset:hover { filter: brightness(1.12); }
.empty-reset:active { filter: brightness(0.9); transform: none; }

/* ============================ Footer ============================ */

.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-raise);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding-top: 34px;
  padding-bottom: 44px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-faint);
}

.footer-mark {
  color: var(--accent);
  letter-spacing: 0.14em;
  font-weight: 700;
}

/* ============================ Detail dialog ============================ */

.detail {
  width: min(980px, calc(100% - 40px));
  height: min(88dvh, 920px);
  margin: auto;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}

.detail::backdrop {
  background: rgba(4, 6, 10, 0.8);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

@media (prefers-reduced-motion: no-preference) {
  .detail[open] {
    animation: detail-in 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
  }
  @keyframes detail-in {
    from { opacity: 0; transform: translateY(16px) scale(0.985); }
    to { opacity: 1; transform: none; }
  }
}

.detail-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.detail-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex: none;
  padding: 12px 14px 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-raise);
  border-radius: 8px 8px 0 0;
}

.detail-route {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.detail-close {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  background: none;
  border: 1px solid var(--control-line);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.detail-close:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.detail-scroll {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.detail-article {
  max-width: 700px;
  margin: 0 auto;
  padding: 44px 28px 60px;
}

.detail-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.detail-byline {
  margin: 0 0 30px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.detail-figure { margin: 0 0 34px; }

.detail-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.detail-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.detail-body p {
  margin: 0 0 1.5em;
  font-size: 18px;
  line-height: 1.72;
  color: #ccd3dd;
}

.detail-body p:first-of-type::first-letter {
  float: left;
  padding: 6px 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 3.6em;
  line-height: 0.78;
  color: var(--accent);
}

.detail-actions {
  margin: 36px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.detail-actions .save-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 12px 22px;
  background: none;
  border: 1px solid var(--control-line);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.detail-actions .save-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.detail-actions .save-toggle[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.detail-actions .save-toggle[aria-pressed="true"]:active {
  filter: brightness(0.9);
  transform: none;
}

.detail-pager {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.pager-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  background: none;
  border: 1px solid var(--control-line);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.pager-btn:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
}

.pager-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

#pager-next { justify-self: end; }

.pager-pos {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-faint);
}

/* ============================ Responsive ============================ */

@media (max-width: 1020px) {
  .story-open { grid-template-columns: 48px 1fr 172px; gap: 18px; }
  .story-title { font-size: 22px; }
}

@media (max-width: 860px) {
  .shell { padding: 0 20px; }
  html { scroll-padding-top: 190px; }

  .masthead-top { padding: 10px 0; }
  .masthead-main { grid-template-columns: 1fr; padding: 20px 0 26px; }
  .masthead-blurb { max-width: 520px; margin-top: 18px; }

  .controls-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "search search"
      "select saved"
      "status status";
    gap: 10px 14px;
    padding-top: 14px;
  }

  .saved-toggle { justify-content: center; }

  .story { border-left-width: 3px; }
  .story-open {
    grid-template-columns: 40px 1fr;
    grid-template-rows: auto auto;
    gap: 12px 14px;
    padding: 20px 12px;
  }
  .story-num { padding-top: 5px; }
  .story-thumb {
    grid-column: 2;
    aspect-ratio: 16 / 9;
    max-height: 150px;
  }
  .story-title { font-size: 20px; }

  .detail {
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    border: 0;
    border-radius: 0;
  }
  .detail-bar { border-radius: 0; padding-left: 14px; }
  .detail-article { padding: 32px 20px 48px; }
  .detail-body p { font-size: 16.5px; }
  .detail-pager { grid-template-columns: 1fr; justify-items: stretch; }
  #pager-next { justify-self: stretch; }
  .pager-pos { text-align: center; }

  .footer-grid { grid-template-columns: 1fr; gap: 12px; }
}

@media (max-width: 400px) {
  .controls-grid { grid-template-columns: 1fr; grid-template-areas: "search" "select" "saved" "status"; }
  .saved-toggle { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}