/* ── VARIABLES ─────────────────────────────────────────────────────────────── */
:root {
  --bg:         #f0f0ee;
  --bg-panel:   #e4e4e0;
  --bg-row:     #d8d8d4;
  --border:     #c0c0bb;
  --border-hot: #999994;
  --red:        #e10600;
  --gold:       #b58900;
  --white:      #111111;
  --grey-1:     #111111;
  --grey-2:     #444444;
  --grey-3:     #777777;
  --grey-4:     #bbbbbb;

  --c-ferrari:   #e10600;
  --c-mercedes:  #00d2be;
  --c-redbull:   #1e41ff;
  --c-mclaren:   #ff8000;
  --c-williams:  #005aff;
  --c-renault:   #e91e8c;
  --c-alpine:    #0082ff;
  --c-brm:       #8b0000;
  --c-lotus:     #b8960c;
  --c-tyrrell:   #228b22;
  --c-brabham:   #6633cc;
  --c-cooper:    #8b6914;
  --c-benetton:  #1144bb;
  --c-jordan:    #d4a017;
  --c-forceindia:#cc4488;
  --c-astonmartin:#00665a;
  --c-haas:      #aaaaaa;
  --c-at:        #3d6cff;
  --c-sauber:    #8b0000;
  --c-audi:      #999999;
  --c-cadillac:  #bbbbbb;
  --c-vintage:   #b8960c;
  --c-other:     #666666;

  --topbar-h: 56px;
  --sidebar-w: 300px;
  --font-display: 'Barlow Condensed', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
}

/* ── RESET & BASE ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--grey-1);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* ── TOP BAR ────────────────────────────────────────────────────────────────── */
#topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--bg-panel);
  border-bottom: 2px solid var(--red);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

#topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

#topbar-flag {
  font-size: 0; /* hide text, use as accent block */
  width: 6px;
  height: 32px;
  background: var(--red);
  display: block;
  flex-shrink: 0;
}

#title-main {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--white);
  line-height: 1;
  text-transform: uppercase;
}

#title-sub {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--grey-3);
  text-transform: uppercase;
  margin-top: 2px;
  font-family: var(--font-mono);
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.stat-block {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  letter-spacing: 0.05em;
}

.stat-label {
  font-size: 0.5rem;
  letter-spacing: 0.2em;
  color: var(--grey-3);
  text-transform: uppercase;
  margin-top: 1px;
}

.stat-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ── LAYOUT ─────────────────────────────────────────────────────────────────── */
#layout {
  position: fixed;
  top: var(--topbar-h);
  left: 0; right: 0; bottom: 0;
  display: flex;
}

/* ── SIDEBAR ────────────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--border); }

/* EMPTY STATE */
#sidebar-empty-state {
  padding: 28px 22px;
}

#empty-icon {
  font-size: 2rem;
  color: var(--grey-3);
  margin-bottom: 16px;
  letter-spacing: 0;
}

#sidebar-empty-state p {
  font-size: 0.7rem;
  color: var(--grey-2);
  letter-spacing: 0.08em;
  line-height: 2;
  text-transform: uppercase;
  margin-bottom: 28px;
}

/* LEGEND */
#legend { margin-top: 8px; }

.legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  font-size: 0.6rem;
  color: var(--grey-2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ldot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-2026 { margin-top: 6px; }

.ldot-ring {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1.5px dashed var(--gold);
  flex-shrink: 0;
}

/* SIDEBAR CONTENT */
#sidebar-content { }

/* HEADER */
#sb-header {
  padding: 20px 22px 14px;
  border-bottom: 1px solid var(--border);
}

#sb-driver-name {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--white);
  line-height: 1;
  text-transform: uppercase;
  word-break: break-word;
}

#sb-grid-badge {
  display: inline-block;
  margin-top: 8px;
  background: var(--gold);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 3px 8px;
}

/* DEGREE BLOCK */
#sb-degree-block {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

#sb-degree-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--red);
  line-height: 1;
  letter-spacing: -0.02em;
}

#sb-degree-label {
  font-size: 0.6rem;
  color: var(--grey-2);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1.6;
}

/* CHAIN */
#sb-chain {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
}

.sb-section-title {
  font-size: 0.52rem;
  color: var(--grey-3);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.sb-section-title span {
  color: var(--grey-2);
  margin-left: 6px;
}

/* Chain list: vertical timeline */
.chain-node {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  position: relative;
}

.chain-dot-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 16px;
  margin-top: 3px;
}

.chain-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grey-3);
  flex-shrink: 0;
}

.chain-dot.is-start  { background: var(--white); }
.chain-dot.is-2026   { background: var(--gold); width: 10px; height: 10px; }
.chain-dot.on-path   { background: var(--white); }

.chain-line {
  width: 1px;
  flex: 1;
  min-height: 20px;
  background: var(--border-hot);
  margin: 3px 0;
}

.chain-info { padding-bottom: 4px; }

.chain-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--white);
  text-transform: uppercase;
}

.chain-name.is-2026 { color: var(--gold); }

.chain-edge {
  font-size: 0.52rem;
  color: var(--grey-2);
  letter-spacing: 0.1em;
  margin-top: 2px;
  text-transform: uppercase;
}

.chain-edge-team {
  font-weight: 600;
  margin-right: 6px;
}

/* TEAMMATES */
#sb-teammates-section {
  padding: 16px 22px 24px;
}

.tm-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  margin-bottom: 2px;
  background: var(--bg-row);
  border-left: 2px solid transparent;
  transition: border-color 0.15s, background 0.15s;
  cursor: default;
}

.tm-row:hover {
  background: #1e1e1e;
  border-left-color: var(--red);
}

.tm-row.is-2026-driver {
  border-left-color: var(--gold);
}

.tm-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--grey-1);
  text-transform: uppercase;
}

.tm-row.is-2026-driver .tm-name { color: var(--gold); }

.tm-meta {
  text-align: right;
}

.tm-team {
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  color: var(--grey-2);
  text-transform: uppercase;
}

.tm-years {
  font-size: 0.5rem;
  color: var(--grey-3);
  letter-spacing: 0.05em;
  margin-top: 1px;
}

/* ── GRAPH AREA ──────────────────────────────────────────────────────────────── */
#graph-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

/* subtle grid texture */
#graph-area::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

#canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* ── CONTROLS ───────────────────────────────────────────────────────────────── */
#controls {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 10;
  display: flex;
  gap: 6px;
}

.ctrl-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--grey-2);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  padding: 8px 14px;
  cursor: pointer;
  text-transform: uppercase;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  white-space: nowrap;
}

.ctrl-btn:hover {
  border-color: var(--red);
  color: var(--red);
  background: #e8e8e5;
}

.ctrl-btn.active {
  border-color: var(--gold);
  color: var(--gold);
  background: #f0ece0;
}

/* ── ZOOM HINT ──────────────────────────────────────────────────────────────── */
#zoom-hint {
  position: absolute;
  bottom: 14px;
  right: 16px;
  font-size: 0.5rem;
  color: var(--grey-3);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 10;
}

/* ── SVG ELEMENTS ───────────────────────────────────────────────────────────── */
.link {
  fill: none;
  transition: stroke 0.1s, stroke-opacity 0.1s, stroke-width 0.1s;
}

.node { cursor: pointer; }

.node-circle {
  transition: fill-opacity 0.15s, r 0.15s;
}

.ring2026 {
  fill: none;
  stroke: #b58900;
  stroke-width: 1.5px;
  stroke-dasharray: 3 2;
  pointer-events: none;
  transition: opacity 0.15s;
}

.node-label {
  font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
  dominant-baseline: auto;
  user-select: none;
}

/* ── SCROLLBAR ──────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }