/* ============ Namma Saarige — Apple-inspired design system ============ */

:root {
  --bg: #f5f5f7;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-card: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --hairline: rgba(0, 0, 0, 0.08);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --green: #34c759;
  --orange: #ff9500;
  --red: #ff3b30;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06), 0 8px 32px rgba(0, 0, 0, 0.05);
  --shadow-pop: 0 10px 40px rgba(0, 0, 0, 0.16);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-elevated: rgba(22, 22, 24, 0.72);
    --bg-card: #1c1c1e;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-tertiary: #8e8e93;
    --hairline: rgba(255, 255, 255, 0.12);
    --accent: #2997ff;
    --accent-hover: #45a4ff;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4), 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-pop: 0 10px 40px rgba(0, 0, 0, 0.6);
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-elevated);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #0071e3, #00c7be);
  color: #fff;
  border-radius: 9px;
  font-size: 18px;
  font-weight: 700;
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Segmented control */
.segmented {
  display: flex;
  background: rgba(120, 120, 128, 0.16);
  border-radius: 100px;
  padding: 2px;
}

.seg-btn {
  display: flex; align-items: center; gap: 6px;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 7px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.seg-btn.active {
  background: var(--bg-card);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

/* ---------- Hero ---------- */
.hero {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 22px 28px;
  text-align: center;
}

.hero-title {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  background: linear-gradient(180deg, var(--text) 60%, var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  margin-top: 12px;
  font-size: clamp(15px, 2.4vw, 19px);
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ---------- Layout ---------- */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 22px 60px;
}

.panel { display: none; animation: fadeUp 0.45s cubic-bezier(0.25, 0.1, 0.25, 1); }
.panel.active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card);
}

.glass {
  background: var(--bg-elevated);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}

/* Card tabs (bus sub-modes) */
.card-tabs {
  display: flex;
  gap: 4px;
  background: rgba(120, 120, 128, 0.14);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 22px;
}

.card-tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 0;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.22s ease;
}

.card-tab.active {
  background: var(--bg-card);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.bus-subpanel { display: none; }
.bus-subpanel.active { display: block; animation: fadeUp 0.3s ease; }

/* ---------- Fields ---------- */
.field-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 18px;
}

.field { flex: 1; min-width: 0; margin-bottom: 14px; }
.field-row .field { margin-bottom: 0; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
  margin-bottom: 7px;
  padding-left: 4px;
}

.input-shell {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(120, 120, 128, 0.10);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.input-shell:focus-within {
  background: var(--bg-card);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}

.input-shell input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: -0.01em;
  padding: 13px 0;
}

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

.dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.dot-from { background: var(--green); }
.dot-to { background: var(--red); }
.dot-route { background: var(--orange); }

.clear-btn {
  border: none;
  background: rgba(120, 120, 128, 0.2);
  color: var(--text-secondary);
  width: 20px; height: 20px;
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.input-shell input:not(:placeholder-shown) ~ .clear-btn { display: flex; }

.swap-btn {
  flex-shrink: 0;
  width: 40px; height: 46px;
  border: 1px solid var(--hairline);
  background: var(--bg-card);
  color: var(--accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.2s;
}

.swap-btn:hover { transform: rotate(180deg); }

/* ---------- Autocomplete dropdown ---------- */
.combo-wrap { position: relative; }

.dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  z-index: 50;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
  max-height: 280px;
  overflow-y: auto;
  display: none;
}

.dropdown.open { display: block; animation: popIn 0.18s cubic-bezier(0.25, 0.1, 0.25, 1); }

@keyframes popIn {
  from { opacity: 0; transform: translateY(-4px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.dd-item {
  padding: 11px 14px;
  font-size: 14.5px;
  letter-spacing: -0.01em;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 9px;
  border-bottom: 1px solid var(--hairline);
}

.dd-item:last-child { border-bottom: none; }
.dd-item:hover, .dd-item.hl { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.dd-item mark { background: none; color: var(--accent); font-weight: 600; }

.dd-lines { display: flex; gap: 4px; margin-left: auto; flex-shrink: 0; }
.dd-line-dot { width: 8px; height: 8px; border-radius: 50%; }

.dd-empty { padding: 14px; font-size: 14px; color: var(--text-tertiary); text-align: center; }

/* ---------- Chips ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  border: 1px solid var(--hairline);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: -0.01em;
  padding: 8px 15px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- Primary button ---------- */
.primary-btn {
  width: 100%;
  margin-top: 20px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 15px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.primary-btn:hover { background: var(--accent-hover); }
.primary-btn:active { transform: scale(0.985); }
.primary-btn:disabled { opacity: 0.55; cursor: default; }

.primary-btn .spinner {
  display: inline-block;
  width: 17px; height: 17px;
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  vertical-align: -3px;
  margin-right: 9px;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Results ---------- */
.results { margin-top: 26px; }

.results-heading {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 4px 2px 14px;
}

.results-sub { font-size: 14px; color: var(--text-secondary); margin: -8px 2px 16px; }

.route-card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
  animation: fadeUp 0.4s cubic-bezier(0.25, 0.1, 0.25, 1) both;
}

.route-card:nth-child(2) { animation-delay: 0.04s; }
.route-card:nth-child(3) { animation-delay: 0.08s; }
.route-card:nth-child(4) { animation-delay: 0.12s; }
.route-card:nth-child(5) { animation-delay: 0.16s; }

.route-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.route-badge {
  background: linear-gradient(135deg, #0071e3, #00c7be);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0;
  padding: 6px 14px;
  border-radius: 9px;
  white-space: nowrap;
}

.route-ends {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  min-width: 0;
}

.route-ends .arrow { color: var(--text-tertiary); margin: 0 6px; }

.freq-badge {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 5px 11px;
  border-radius: 100px;
  white-space: nowrap;
}

.freq-high { background: color-mix(in srgb, var(--green) 18%, transparent); color: var(--green); }
.freq-avg { background: color-mix(in srgb, var(--orange) 18%, transparent); color: var(--orange); }
.freq-rare { background: color-mix(in srgb, var(--red) 15%, transparent); color: var(--red); }
.freq-na { background: rgba(120,120,128,0.14); color: var(--text-tertiary); }

.stops-toggle {
  margin-top: 12px;
  border: none;
  background: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
}

.stops-list {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-secondary);
  letter-spacing: -0.005em;
}

.stops-list.open { display: block; animation: fadeUp 0.25s ease; }
.stops-list strong { color: var(--text); font-weight: 650; }

.stop-chip-sep { color: var(--text-tertiary); margin: 0 2px; }

/* Hop plans */
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 9px; }

.route-pill {
  border: 1px solid var(--hairline);
  background: rgba(120, 120, 128, 0.10);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.route-pill:hover { border-color: var(--accent); color: var(--accent); background: transparent; }

.route-pill.frequent {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent);
}

.pill-hidden { display: none; }

.pill-more {
  background: transparent;
  border-style: dashed;
  color: var(--text-secondary);
  font-weight: 500;
}

.hop-via {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.5;
}

/* Error / empty state */
.state-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  animation: fadeUp 0.35s ease;
}

.state-card .emoji { font-size: 40px; display: block; margin-bottom: 12px; }
.state-card h3 { font-size: 19px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 6px; }
.state-card p { font-size: 14.5px; color: var(--text-secondary); }

/* ---------- Metro specifics ---------- */
.line-legend {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 22px;
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.line-pill { width: 22px; height: 8px; border-radius: 100px; display: inline-block; }

/* Metro summary stats */
.metro-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.stat-tile {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: 15px 10px;
  text-align: center;
  box-shadow: var(--shadow-card);
  animation: fadeUp 0.4s ease both;
}

.stat-tile:nth-child(2) { animation-delay: 0.05s; }
.stat-tile:nth-child(3) { animation-delay: 0.1s; }
.stat-tile:nth-child(4) { animation-delay: 0.15s; }

.stat-value { font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.stat-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; margin-top: 3px; }

/* Metro timeline */
.metro-timeline {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  box-shadow: var(--shadow-card);
  animation: fadeUp 0.45s ease both;
  animation-delay: 0.1s;
}

.tl-row { display: flex; gap: 16px; }

.tl-rail {
  width: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.tl-node {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 3px solid;
  background: var(--bg-card);
  flex-shrink: 0;
  z-index: 1;
}

.tl-node.interchange {
  width: 17px; height: 17px;
  background: var(--bg-card);
  border-width: 4px;
}

.tl-seg { width: 5px; flex: 1; min-height: 26px; border-radius: 3px; }

.tl-content { flex: 1; min-width: 0; padding-bottom: 22px; }
.tl-row:last-child .tl-content { padding-bottom: 0; }

.tl-station { font-size: 15.5px; font-weight: 600; letter-spacing: -0.01em; padding-top: -2px; }

.tl-meta { font-size: 13px; color: var(--text-secondary); margin-top: 3px; }

.tl-board {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  color: #fff;
  padding: 4px 11px;
  border-radius: 100px;
  margin-top: 7px;
}

.tl-interchange-note {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  background: rgba(120, 120, 128, 0.13);
  color: var(--text-secondary);
  padding: 4px 11px;
  border-radius: 100px;
  margin-top: 7px;
}

/* ---------- Source note & footer ---------- */
.source-note {
  margin-top: 22px;
  text-align: center;
  font-size: 12.5px;
  color: var(--text-tertiary);
}

.source-note a { color: var(--text-secondary); }

.footer {
  border-top: 1px solid var(--hairline);
  padding: 28px 22px 40px;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .field-row { flex-direction: column; align-items: stretch; }
  .swap-btn { align-self: center; transform: rotate(90deg); width: 46px; height: 36px; }
  .swap-btn:hover { transform: rotate(270deg); }
  .metro-stats { grid-template-columns: repeat(2, 1fr); }
  .brand-name { font-size: 15px; }
  .seg-btn { padding: 7px 13px; font-size: 13px; }
  .hero { padding-top: 36px; }
  .card { padding: 20px 16px; }
  .freq-badge { margin-left: 0; }
}