/* =====================================================================
   SG STREETS — Design System
   Grounded in real Singapore road vernacular:
   - Amber = EMAS overhead gantry dot-matrix advisory signs
   - Green = LTA expressway signage
   - Line colors = official SMRT/SBST rail line colors
   ===================================================================== */

:root{
  --asphalt-950:#0A0D12;
  --asphalt-900:#0E131A;
  --asphalt-800:#141B24;
  --asphalt-700:#1C2530;
  --asphalt-600:#2A3542;
  --hairline:#26313d;

  --fog-100:#EAEEF1;
  --fog-300:#B7C1CB;
  --fog-400:#8A96A3;
  --fog-600:#5C6873;

  --signal-amber:#FFB000;
  --signal-amber-dim:#7A5600;
  --expressway-green:#00A65E;
  --expressway-green-dim:#0B3B29;
  --alert-red:#FF4D4D;

  /* "ink" tokens: same accent hues, tuned per theme for readable
     foreground text on a page/card surface (as opposed to the raw
     accent tokens above, which stay vivid for solid fills, buttons,
     borders and indicator dots). */
  --amber-ink:#FFB000;
  --green-ink:#00C071;
  --red-ink:#FF6161;
  --btn-ink:#0A0D12; /* always-dark text on solid accent buttons */

  --header-bg:rgba(10,13,18,.9);
  --hero-tint-1:rgba(0,166,94,.14);
  --hero-tint-2:rgba(255,176,0,.10);

  --mrt-nsl:#E1251B;
  --mrt-ewl:#009645;
  --mrt-nel:#9900AA;
  --mrt-ccl:#FA9E0D;
  --mrt-dtl:#0056A8;
  --mrt-tel:#9D5B25;

  /* Fixed "device" palette — used only by components styled after
     physical hardware (LED bus displays, EMAS gantries, camera
     bezels), which stay dark in both Light and Dark View since the
     real things they represent don't change with daylight. */
  --device-bg:#0A0D12;
  --device-bg-alt:#0E131A;
  --device-surface:#141B24;
  --device-chip:#1C2530;
  --device-border:#2A3542;
  --device-text:#EAEEF1;
  --device-text-dim:#8A96A3;
  --device-text-mute:#5C6873;
  --device-amber:#FFB000;

  --font-display:'Big Shoulders Display', sans-serif;
  --font-body:'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  --radius:10px;
  --radius-sm:6px;
}

[data-theme="light"]{
  --asphalt-950:#F3F4F1;
  --asphalt-900:#FFFFFF;
  --asphalt-800:#FFFFFF;
  --asphalt-700:#ECEEE9;
  --asphalt-600:#D7DBD3;
  --hairline:#DFE3DC;

  --fog-100:#12161B;
  --fog-300:#3C444C;
  --fog-400:#5C6873;
  --fog-600:#6B7580;

  --expressway-green-dim:#DEF2E8;

  --amber-ink:#8A5B00;
  --green-ink:#04703C;
  --red-ink:#C81E2B;

  --header-bg:rgba(255,255,255,.86);
  --hero-tint-1:rgba(0,166,94,.09);
  --hero-tint-2:rgba(255,176,0,.08);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--asphalt-950);
  color:var(--fog-100);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  transition:background-color .2s ease, color .2s ease;
}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px;}
ul{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;letter-spacing:.02em;margin:0;}

:focus-visible{outline:2px solid var(--signal-amber);outline-offset:2px;}

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

/* ---------------------------------------------------------------------
   Signature element: the EMAS gantry ticker
   --------------------------------------------------------------------- */
.gantry-bar{
  display:flex;
  align-items:stretch;
  background:
    repeating-linear-gradient(90deg, rgba(0,0,0,.35) 0 2px, transparent 2px 4px),
    #050704;
  border-bottom:1px solid #000;
  height:38px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
}
.gantry-label{
  flex:0 0 auto;
  display:flex;align-items:center;
  padding:0 14px;
  background:var(--signal-amber-dim);
  color:var(--signal-amber);
  font-weight:600;
  border-right:1px solid #000;
}
.gantry-track{
  flex:1 1 auto;
  overflow:hidden;
  position:relative;
  display:flex;
  align-items:center;
}
.gantry-ticker{
  white-space:nowrap;
  color:var(--signal-amber);
  text-shadow:0 0 6px rgba(255,176,0,.55);
  padding-left:100%;
  animation:ticker 26s linear infinite;
}
@keyframes ticker{
  0%{transform:translateX(0);}
  100%{transform:translateX(-100%);}
}
.gantry-demo{
  flex:0 0 auto;
  display:flex;align-items:center;
  padding:0 14px;
  color:var(--device-text-mute);
  border-left:1px solid #000;
  font-size:11px;
}

/* ---------------------------------------------------------------------
   Header / nav
   --------------------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--header-bg);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--hairline);
  transition:background-color .2s ease, border-color .2s ease;
}
.header-inner{
  display:flex;align-items:center;gap:32px;
  height:68px;
}
.brand{display:flex;align-items:baseline;gap:2px;font-family:var(--font-display);font-size:26px;font-weight:800;}
.brand-mark{color:var(--amber-ink);}
.brand-mark.small,.brand-word.small{font-size:18px;}
.main-nav{display:flex;gap:4px;flex:1;}
.main-nav a{
  padding:8px 14px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;color:var(--fog-400);
  transition:color .15s, background .15s;
}
.main-nav a:hover{color:var(--fog-100);background:var(--asphalt-700);}
.main-nav a.active{color:var(--btn-ink);background:var(--signal-amber);}
.header-clock{
  font-family:var(--font-mono);font-size:13px;color:var(--fog-400);
  border:1px solid var(--hairline);border-radius:var(--radius-sm);
  padding:6px 10px;white-space:nowrap;
}
.theme-toggle{
  display:flex;align-items:center;gap:8px;
  background:var(--asphalt-700);border:1px solid var(--hairline);border-radius:20px;
  padding:6px 12px 6px 6px;cursor:pointer;font-family:var(--font-mono);font-size:12px;
  color:var(--fog-300);white-space:nowrap;
}
.theme-toggle .knob{
  width:20px;height:20px;border-radius:50%;background:var(--signal-amber);
  display:flex;align-items:center;justify-content:center;font-size:11px;flex:0 0 auto;
}
.theme-toggle:hover{border-color:var(--signal-amber);}

@media (max-width:860px){
  .main-nav{display:none;}
  .header-clock{display:none;}
  .theme-toggle span.label{display:none;}
  body{padding-bottom:64px;}
}

.mobile-nav{
  display:none;
}
@media (max-width:860px){
  .mobile-nav{
    display:flex;justify-content:space-around;
    position:fixed;left:0;right:0;bottom:0;z-index:60;
    background:var(--asphalt-900);border-top:1px solid var(--hairline);
    padding:6px 4px;
  }
  .mobile-nav a{
    flex:1;text-align:center;font-size:10.5px;font-weight:600;
    color:var(--fog-400);padding:6px 2px;border-radius:var(--radius-sm);
  }
  .mobile-nav a.active{color:var(--amber-ink);}
}

/* ---------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------- */
.hero{
  padding:64px 0 40px;
  background:
    radial-gradient(ellipse at 20% -10%, var(--hero-tint-1), transparent 55%),
    radial-gradient(ellipse at 90% 0%, var(--hero-tint-2), transparent 45%);
  border-bottom:1px solid var(--hairline);
}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr;}}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--green-ink);margin-bottom:14px;display:flex;align-items:center;gap:8px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--expressway-green);box-shadow:0 0 8px var(--expressway-green);animation:pulse 1.8s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.hero h1{
  font-size:clamp(38px,5.2vw,64px);line-height:.98;color:var(--fog-100);
}
.hero h1 em{font-style:normal;color:var(--amber-ink);}
.hero p.lead{font-size:17px;color:var(--fog-300);max-width:52ch;margin-top:18px;}

/* Bus-stop display styled search — the hero's centerpiece.
   Styled as a physical LED sign: stays dark in both Light and Dark
   View, same as a real bus-stop display would regardless of daylight. */
.stop-display{
  background:var(--device-surface);
  border:1px solid var(--device-border);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:0 20px 60px -20px rgba(0,0,0,.6);
}
.stop-display-head{
  display:flex;justify-content:space-between;align-items:center;
  font-family:var(--font-mono);font-size:11px;color:var(--device-text-mute);
  text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px;
}
.stop-display form{display:flex;gap:8px;margin-bottom:16px;}
.stop-display input[type=text]{
  flex:1;background:var(--device-bg);border:1px solid var(--device-border);
  color:var(--device-amber);font-family:var(--font-mono);font-size:20px;letter-spacing:.06em;
  padding:12px 14px;border-radius:var(--radius-sm);
}
.stop-display input[type=text]::placeholder{color:var(--device-text-mute);}
.btn{
  background:var(--signal-amber);color:var(--btn-ink);border:none;
  font-family:var(--font-body);font-weight:700;font-size:14px;
  padding:0 20px;border-radius:var(--radius-sm);cursor:pointer;
  transition:transform .1s, background .15s;
}
.btn:hover{background:#ffc23d;}
.btn:active{transform:scale(.97);}
.btn.ghost{background:transparent;border:1px solid var(--asphalt-600);color:var(--fog-100);}
.btn.ghost:hover{border-color:var(--amber-ink);color:var(--amber-ink);}
.btn.block{width:100%;padding:12px;}

.eta-board{min-height:160px;}
.eta-row{
  display:grid;grid-template-columns:52px 1fr auto;align-items:center;gap:12px;
  padding:10px 0;border-bottom:1px solid var(--device-border);
  font-family:var(--font-mono);
}
.eta-row:last-child{border-bottom:none;}
.svc-badge{
  background:var(--device-chip);color:var(--device-text);border-radius:6px;
  text-align:center;padding:4px 0;font-weight:600;font-size:14px;
}
.eta-times{display:flex;gap:14px;justify-content:flex-end;}
.eta-time{font-size:15px;color:var(--device-text);}
.eta-time.imminent{color:var(--expressway-green);font-weight:600;}
.eta-sub{font-size:10px;color:var(--device-text-mute);display:block;text-align:center;}
.stop-display .placeholder-msg,.eta-board .placeholder-msg{color:var(--device-text-mute);}
.placeholder-msg{color:var(--fog-600);font-size:13px;padding:24px 0;text-align:center;}

/* ---------------------------------------------------------------------
   Section / cards
   --------------------------------------------------------------------- */
section.block{padding:56px 0;}
section.block.tight{padding:32px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:24px;gap:16px;flex-wrap:wrap;}
.section-head h2{font-size:30px;color:var(--fog-100);}
.section-head p{color:var(--fog-400);margin:6px 0 0;font-size:14px;}
.section-head .link-all{font-family:var(--font-mono);font-size:12px;color:var(--green-ink);}

.grid{display:grid;gap:20px;}
.grid.cols-4{grid-template-columns:repeat(4,1fr);}
.grid.cols-3{grid-template-columns:repeat(3,1fr);}
.grid.cols-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:960px){.grid.cols-4{grid-template-columns:repeat(2,1fr);} .grid.cols-3{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr;}}

.card{
  background:var(--asphalt-800);border:1px solid var(--hairline);border-radius:var(--radius);
  padding:20px;position:relative;overflow:hidden;
  transition:background-color .2s ease, border-color .2s ease;
}
.card.link-card{transition:border-color .15s, transform .15s;}
.card.link-card:hover{border-color:var(--signal-amber);transform:translateY(-2px);}
.card-icon{
  width:38px;height:38px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:var(--asphalt-700);margin-bottom:14px;font-size:18px;
}
.card h3{font-size:18px;color:var(--fog-100);margin-bottom:6px;}
.card p{color:var(--fog-400);font-size:13.5px;margin:0;}
.card .tag{
  position:absolute;top:16px;right:16px;font-family:var(--font-mono);font-size:10px;
  color:var(--green-ink);border:1px solid var(--expressway-green-dim);border-radius:20px;padding:2px 8px;
}

.stat-card{background:var(--asphalt-800);border:1px solid var(--hairline);border-radius:var(--radius);padding:18px;}
.stat-card .num{font-family:var(--font-display);font-size:38px;color:var(--amber-ink);line-height:1;}
.stat-card .label{color:var(--fog-400);font-size:12.5px;margin-top:6px;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.06em;}

/* ---------------------------------------------------------------------
   Incident feed
   --------------------------------------------------------------------- */
.incident-list{display:flex;flex-direction:column;gap:0;}
.incident-item{
  display:grid;grid-template-columns:110px 1fr;gap:16px;
  padding:14px 0;border-bottom:1px solid var(--hairline);
}
.incident-item:last-child{border-bottom:none;}
.incident-type{
  font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.05em;
  padding:4px 8px;border-radius:4px;height:fit-content;text-align:center;
}
.incident-type.accident{background:rgba(255,77,77,.15);color:var(--red-ink);}
.incident-type.heavy-traffic{background:rgba(255,176,0,.15);color:var(--amber-ink);}
.incident-type.roadwork{background:rgba(0,166,94,.15);color:var(--green-ink);}
.incident-type.roadblock,.incident-type.vehicle-breakdown{background:var(--asphalt-700);color:var(--fog-300);}
.incident-msg{font-size:14px;color:var(--fog-100);}
.incident-msg .ts{color:var(--fog-600);font-family:var(--font-mono);font-size:12px;margin-right:8px;}

/* ---------------------------------------------------------------------
   Congestion bars
   --------------------------------------------------------------------- */
.road-row{display:grid;grid-template-columns:80px 1fr 60px;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid var(--hairline);}
.road-row:last-child{border-bottom:none;}
.road-name{font-family:var(--font-mono);font-weight:600;font-size:14px;}
.speed-track{height:8px;background:var(--asphalt-700);border-radius:6px;overflow:hidden;}
.speed-fill{height:100%;border-radius:6px;}
.road-status{font-family:var(--font-mono);font-size:11px;text-align:right;text-transform:uppercase;}

/* ---------------------------------------------------------------------
   Camera wall
   --------------------------------------------------------------------- */
.cam-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
@media (max-width:900px){.cam-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:600px){.cam-grid{grid-template-columns:1fr;}}
.cam-tile{
  background:#000;border:1px solid var(--device-border);border-radius:var(--radius-sm);overflow:hidden;position:relative;
}
.cam-tile img{display:block;width:100%;height:180px;object-fit:cover;filter:saturate(.85) contrast(1.05);}
.cam-tile .cam-meta{
  display:flex;justify-content:space-between;align-items:center;
  padding:8px 10px;font-family:var(--font-mono);font-size:11px;color:var(--device-text-dim);
  background:var(--device-bg-alt);
}
.cam-tile .cam-rec{color:var(--alert-red);display:flex;align-items:center;gap:5px;}
.cam-tile .cam-rec::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--alert-red);animation:pulse 1.4s infinite;}
.cam-tile .cam-badge{
  position:absolute;top:8px;left:8px;background:rgba(0,0,0,.6);color:var(--device-amber);
  font-family:var(--font-mono);font-size:10px;padding:2px 6px;border-radius:4px;text-transform:uppercase;
}

/* ---------------------------------------------------------------------
   Rail lines
   --------------------------------------------------------------------- */
.line-row{
  display:flex;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid var(--hairline);
}
.line-row:last-child{border-bottom:none;}
.line-badge{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:800;font-size:16px;color:#fff;
}
.line-info h4{font-size:15px;color:var(--fog-100);}
.line-info span{font-size:12.5px;color:var(--fog-400);}
.line-status{margin-left:auto;font-family:var(--font-mono);font-size:12px;text-transform:uppercase;}
.line-status.normal{color:var(--green-ink);}
.line-status.disrupted{color:var(--red-ink);}

.status-banner{
  display:flex;align-items:center;gap:14px;padding:16px 20px;border-radius:var(--radius);
  margin-bottom:28px;font-size:14px;
}
.status-banner.ok{background:var(--expressway-green-dim);color:var(--green-ink);border:1px solid rgba(0,166,94,.3);}
.status-banner.alert{background:rgba(255,77,77,.1);color:var(--red-ink);border:1px solid rgba(255,77,77,.3);}
.status-banner .icon{font-size:20px;}

/* ---------------------------------------------------------------------
   Directions page
   --------------------------------------------------------------------- */
.route-form{display:grid;grid-template-columns:1fr auto 1fr auto;gap:10px;align-items:center;}
@media (max-width:760px){.route-form{grid-template-columns:1fr;}}
.route-form input{
  background:var(--asphalt-950);border:1px solid var(--asphalt-600);color:var(--fog-100);
  padding:12px 14px;border-radius:var(--radius-sm);font-family:var(--font-body);font-size:14px;width:100%;
}
.route-swap{color:var(--fog-400);font-size:18px;text-align:center;}
.map-placeholder{
  margin-top:24px;border-radius:var(--radius);border:1px solid var(--hairline);
  height:360px;background:
    linear-gradient(var(--asphalt-800) 1px, transparent 1px) 0 0/32px 32px,
    linear-gradient(90deg, var(--asphalt-800) 1px, transparent 1px) 0 0/32px 32px,
    var(--asphalt-900);
  display:flex;align-items:center;justify-content:center;color:var(--fog-600);
  font-family:var(--font-mono);font-size:13px;flex-direction:column;gap:8px;
}
.route-summary{margin-top:20px;display:flex;gap:24px;flex-wrap:wrap;}
.route-summary .item{font-family:var(--font-mono);font-size:13px;color:var(--fog-300);}
.route-summary .item b{display:block;font-family:var(--font-display);font-size:24px;color:var(--amber-ink);}

/* ---------------------------------------------------------------------
   Flight board — styled like a physical split-flap departure board.
   Same "always-dark hardware" rationale as the bus LED display and
   camera tiles: it stays dark in both Light and Dark View.
   --------------------------------------------------------------------- */
.flap-shell{
  background:var(--device-bg);border:1px solid var(--device-border);border-radius:var(--radius);
  padding:4px;box-shadow:0 20px 60px -20px rgba(0,0,0,.6);
}
.flap-toolbar{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding:14px 16px;border-bottom:1px solid var(--device-border);
}
.flap-tabs{display:flex;gap:6px;}
.flap-tab{
  font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:.05em;
  padding:6px 14px;border-radius:20px;border:1px solid var(--device-border);
  background:transparent;color:var(--device-text-dim);cursor:pointer;
}
.flap-tab.active{background:var(--device-amber);color:#0A0D12;border-color:var(--device-amber);font-weight:700;}
.flap-meta{font-family:var(--font-mono);font-size:11px;color:var(--device-text-mute);}

.flap-header-row,.flap-row{
  display:grid;grid-template-columns:90px 1.4fr 100px 90px 70px 110px;
  gap:10px;align-items:center;padding:11px 16px;
  font-family:var(--font-mono);font-size:13px;
}
.flap-header-row{
  font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--device-text-mute);
  border-bottom:1px solid var(--device-border);
}
.flap-row{color:var(--device-text);border-bottom:1px solid var(--device-border);}
.flap-row:last-child{border-bottom:none;}
.flap-flight{font-weight:700;letter-spacing:.03em;}
.flap-city{color:var(--device-text);}
.flap-time{color:var(--device-text-dim);}
.flap-time .est{color:var(--signal-amber);margin-left:6px;}
.flap-status{
  text-align:center;padding:3px 6px;border-radius:4px;font-size:10.5px;text-transform:uppercase;
}
.flap-status.scheduled{background:rgba(138,150,163,.18);color:var(--device-text-dim);}
.flap-status.boarding{background:rgba(0,166,94,.18);color:#3ddc97;}
.flap-status.delayed{background:rgba(255,176,0,.18);color:var(--device-amber);}
.flap-status.landed,.flap-status.departed{background:rgba(255,255,255,.08);color:var(--device-text-mute);}
.flap-status.cancelled{background:rgba(255,77,77,.18);color:#ff8080;}

@media (max-width:760px){
  .flap-header-row{display:none;}
  .flap-row{grid-template-columns:1fr;gap:2px;padding:12px 16px;position:relative;}
  .flap-row .flap-status{position:absolute;top:12px;right:16px;text-align:right;}
  .flap-row .flap-flight{font-size:15px;}
  .flap-row > div:nth-child(4)::before{content:'Terminal ';color:var(--device-text-mute);}
  .flap-row > div:nth-child(5)::before{content:'Gate ';color:var(--device-text-mute);}
  .flap-row > div:nth-child(4),.flap-row > div:nth-child(5){display:inline-block;margin-right:14px;font-size:11.5px;}
}
.flap-note{
  padding:12px 16px;font-family:var(--font-mono);font-size:11.5px;color:var(--device-text-mute);
  border-top:1px solid var(--device-border);
}

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */
.site-footer{border-top:1px solid var(--hairline);padding:48px 0 0;margin-top:40px;}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:32px;}
.footer-inner p{color:var(--fog-600);font-size:13px;max-width:38ch;margin-top:10px;}
.footer-cols{display:flex;gap:56px;}
.footer-cols h4{font-size:12px;color:var(--fog-400);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px;}
.footer-cols li{margin-bottom:6px;font-size:13.5px;}
.footer-cols a:hover{color:var(--amber-ink);}
.footer-legal{border-top:1px solid var(--hairline);padding:16px 24px;font-size:12px;color:var(--fog-600);font-family:var(--font-mono);}

/* utility */
.badge-demo{
  display:inline-block;font-family:var(--font-mono);font-size:11px;color:var(--fog-600);
  border:1px dashed var(--asphalt-600);padding:2px 8px;border-radius:20px;margin-left:10px;
}
.mt-0{margin-top:0;}