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

:root {
  --bg: #0a1628;
  --card: #0f2040;
  --card2: #0c1a33;
  --border: #1a3a5c;
  --orange: #f97316;
  --white: #ffffff;
  --muted: #7a9bbf;
  --good: #22c55e;
  --caution: #f97316;
  --danger: #ef4444;
  --good-bg: rgba(34,197,94,0.08);
  --caution-bg: rgba(249,115,22,0.08);
  --danger-bg: rgba(239,68,68,0.08);
}

body {
  background: var(--bg);
  color: var(--white);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100vh;
}

/* ── HEADER ───────────────────────────────── */
.site-header {
  background: linear-gradient(180deg, #060d1a 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
  padding: 1.8rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  color: var(--orange);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}

.site-sub {
  display: block;
  font-size: 1.15rem;
  font-weight: 500;
  margin-top: 0.35rem;
  letter-spacing: 0.02em;
}

.site-tagline {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.6rem;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--good);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.live-dot {
  width: 9px;
  height: 9px;
  background: var(--good);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--good);
  animation: blink 1.4s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── CONTROL PANEL ────────────────────────── */
.control-panel {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1.6rem 2.5rem;
}

.control-inner {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  align-items: flex-start;
}

.control-block { flex: 1; min-width: 280px; }

.control-label {
  color: var(--muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* weather buttons */
.weather-btns { display: flex; gap: 0.7rem; flex-wrap: wrap; }

.w-btn {
  background: var(--card2);
  border: 1.5px solid var(--border);
  color: var(--muted);
  border-radius: 12px;
  padding: 0.85rem 1.1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  min-width: 88px;
}

.w-btn:hover { border-color: var(--orange); color: var(--white); }

.w-btn.active {
  border-color: var(--orange);
  background: rgba(249,115,22,0.12);
  color: var(--white);
  box-shadow: 0 0 14px rgba(249,115,22,0.2);
}

.w-icon { font-size: 1.6rem; line-height: 1; }
.w-name { font-size: 0.82rem; font-weight: 700; margin-top: 0.35rem; }
.w-decel { font-size: 0.68rem; color: var(--muted); margin-top: 0.2rem; }
.w-btn.active .w-decel { color: var(--orange); }

/* speed controls */
.speed-row-top {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.1rem;
}

.speed-big {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
  text-shadow: 0 0 20px rgba(249,115,22,0.3);
}

.speed-unit { font-size: 0.95rem; color: var(--muted); margin-left: 0.3rem; }

.signal-box {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem 1.2rem;
  flex: 1;
}

.signal-lbl { font-size: 0.65rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.25rem; }
.signal-txt { color: var(--orange); font-weight: 700; font-size: 0.9rem; }
.signal-law { color: var(--muted); font-size: 0.72rem; margin-top: 0.2rem; }

.slider-wrap {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.slider-edge { color: var(--muted); font-size: 0.8rem; width: 2rem; text-align: center; }

input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  height: 5px;
  background: linear-gradient(to right, var(--orange) 0%, var(--border) 0%);
  border-radius: 3px;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: var(--orange);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(249,115,22,0.6);
  transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:active { transform: scale(1.2); }

.weather-cond-txt { color: var(--muted); font-size: 0.82rem; margin-top: 0.75rem; }

/* ── SIMULATION SECTION ───────────────────── */
.sim-section { padding: 2rem 2.5rem; }

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.sim-title { font-size: 1.2rem; font-weight: 700; color: var(--white); }

.legend { display: flex; gap: 1.5rem; font-size: 0.82rem; font-weight: 600; }
.leg.good { color: var(--good); }
.leg.caution { color: var(--caution); }
.leg.danger { color: var(--danger); }

/* road grid */
.road-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

@media (max-width: 1100px) { .road-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 680px) { .road-grid { grid-template-columns: 1fr; } }

/* ── ROAD PANEL ───────────────────────────── */
.road-panel {
  background: var(--card);
  border-radius: 14px;
  border: 1.5px solid var(--border);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.road-panel.good {
  border-color: rgba(34,197,94,0.5);
  box-shadow: 0 0 18px rgba(34,197,94,0.08);
}
.road-panel.caution {
  border-color: rgba(249,115,22,0.5);
  box-shadow: 0 0 18px rgba(249,115,22,0.1);
}
.road-panel.danger {
  border-color: rgba(239,68,68,0.6);
  box-shadow: 0 0 22px rgba(239,68,68,0.14);
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.2rem;
  background: rgba(0,0,0,0.25);
  border-bottom: 1px solid var(--border);
}

.p-icon { font-size: 1.2rem; }
.p-name { flex: 1; font-weight: 700; font-size: 0.93rem; }

.status-badge {
  padding: 0.22rem 0.7rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.status-badge.good { background: var(--good-bg); color: var(--good); border: 1px solid rgba(34,197,94,0.4); }
.status-badge.caution { background: var(--caution-bg); color: var(--caution); border: 1px solid rgba(249,115,22,0.4); }
.status-badge.danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239,68,68,0.4); }

.panel-body {
  padding: 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

/* speed trio */
.speed-trio { display: flex; gap: 0.5rem; }

.s-item {
  flex: 1;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem 0.4rem;
  text-align: center;
}

.s-lbl { font-size: 0.6rem; color: var(--muted); margin-bottom: 0.3rem; white-space: nowrap; }

.s-val {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1;
}

.s-val .s-unit { font-size: 0.55rem; color: var(--muted); font-weight: 400; margin-left: 1px; }

.s-val.limit { color: var(--white); }
.s-val.rec { color: #60a5fa; }
.s-val.cur.good { color: var(--good); }
.s-val.cur.caution { color: var(--caution); }
.s-val.cur.danger { color: var(--danger); }

/* sensor row */
.sensor-row { display: flex; gap: 0.5rem; }

.sensor-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
}

.s-icon { font-size: 0.85rem; }
.s-icon.off { filter: grayscale(1); opacity: 0.35; }
.s-sensor-lbl { color: var(--muted); font-size: 0.67rem; }
.s-sensor-val { color: var(--white); font-size: 0.72rem; font-weight: 600; margin-left: auto; }

/* RIM signal */
.rim-box {
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  border: 1px solid;
}

.rim-box.good { background: var(--good-bg); border-color: rgba(34,197,94,0.25); }
.rim-box.caution { background: var(--caution-bg); border-color: rgba(249,115,22,0.25); }
.rim-box.danger { background: var(--danger-bg); border-color: rgba(239,68,68,0.25); }

.rim-lbl { font-size: 0.62rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.2rem; }

.rim-txt { font-weight: 700; font-size: 0.85rem; }
.rim-box.good .rim-txt { color: var(--good); }
.rim-box.caution .rim-txt { color: var(--caution); }
.rim-box.danger .rim-txt { color: var(--danger); }

/* risks */
.risk-row { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.risk-tag {
  background: rgba(239,68,68,0.06);
  border: 1px solid rgba(239,68,68,0.18);
  color: #fca5a5;
  border-radius: 4px;
  padding: 0.18rem 0.5rem;
  font-size: 0.67rem;
}

.law-row { color: var(--muted); font-size: 0.7rem; }

/* ── INFO TABS ────────────────────────────── */
.info-section { padding: 0 2.5rem 2.5rem; }

.info-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 0.8rem 1.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  bottom: -1px;
}

.tab-btn:hover { color: var(--white); }
.tab-btn.active { color: var(--orange); border-bottom-color: var(--orange); }

.tab-body {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 14px 14px;
  padding: 2rem 2.5rem;
}

.tab-body h3 {
  color: var(--orange);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}

/* background tab */
.info-text p {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.85;
  margin-bottom: 1rem;
}

/* sensor table */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.info-table th {
  background: var(--card2);
  padding: 0.75rem 1rem;
  text-align: left;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}

.info-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--white);
}

.info-table tr:last-child td { border-bottom: none; }
.info-table tr:hover td { background: rgba(255,255,255,0.02); }

/* weather algo grid */
.algo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 900px) { .algo-grid { grid-template-columns: repeat(2,1fr); } }

.algo-card {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
}

.ac-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.ac-name { font-weight: 700; font-size: 0.95rem; }
.ac-decel { color: var(--orange); font-size: 1.2rem; font-weight: 800; margin: 0.3rem 0 0.7rem; }
.ac-desc { color: var(--muted); font-size: 0.8rem; line-height: 1.65; margin-bottom: 0.8rem; }
.ac-signal { font-size: 0.8rem; font-weight: 700; }
.ac-signal.ok { color: var(--good); }
.ac-signal.warn { color: var(--caution); }
.ac-signal.bad { color: var(--danger); }
.ac-law { color: var(--muted); font-size: 0.72rem; margin-top: 0.4rem; }

/* speed limit cards */
.limit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 900px) { .limit-grid { grid-template-columns: repeat(2,1fr); } }

.limit-card {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
}

.lc-head { font-weight: 700; font-size: 0.88rem; margin-bottom: 0.5rem; }
.lc-speed { color: var(--orange); font-size: 1.4rem; font-weight: 800; }
.lc-rec { color: var(--muted); font-size: 0.75rem; margin-bottom: 0.6rem; }
.limit-card ul { padding-left: 1.1rem; margin-bottom: 0.7rem; }
.limit-card li { color: var(--muted); font-size: 0.78rem; line-height: 1.7; }
.lc-law { color: #60a5fa; font-size: 0.72rem; }

/* ── FOOTER ───────────────────────────────── */
.site-footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 1.4rem 2.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}