/* billing platform — live demo styles */
/* Dark terminal aesthetic matching docs.bill.sh */

:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #263347;
  --border: #334155;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --error: #ef4444;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --code: #f472b6;
  --code-key: #7dd3fc;
  --code-string: #86efac;
  --code-number: #fbbf24;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */

.app {
  display: grid;
  grid-template-rows: 56px 1fr;
  height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────────────────────*/

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
  white-space: nowrap;
}

.header-logo span {
  color: var(--accent);
}

.header-sep { flex: 1; }

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--panel-2);
  border-color: var(--accent);
  color: var(--accent);
}

.btn.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.btn.btn--primary:hover {
  background: #5254cc;
  border-color: #5254cc;
  color: white;
}

.btn.btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 0 12px var(--accent-glow);
}

.btn.btn--reset {
  color: var(--muted);
}

.btn.btn--reset:hover {
  color: var(--error);
  border-color: var(--error);
  background: transparent;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  border-left: 1px solid var(--border);
  padding-left: 12px;
}

.speed-dots {
  display: flex;
  gap: 4px;
  cursor: pointer;
}

.speed-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.15s;
}

.speed-dot.active { background: var(--accent); }

/* ── Main grid ──────────────────────────────────────────────────────────────*/

.main {
  display: grid;
  grid-template-columns: 320px 1fr 300px;
  gap: 0;
  overflow: hidden;
}

/* ── Panels ─────────────────────────────────────────────────────────────────*/

.panel {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel:last-child { border-right: none; }

.panel-header {
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel-header .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
}

.panel-header .status-dot.running {
  background: var(--success);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

/* ── Pipeline Panel (left) ───────────────────────────────────────────────── */

.pipeline-panel {
  background: var(--panel);
}

.pipeline-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* SVG Pipeline */

.pipeline-svg {
  width: 100%;
  overflow: visible;
}

/* Node styles */

.node {
  cursor: pointer;
  transition: filter 0.2s;
}

.node:hover { filter: brightness(1.15); }

.node-bg {
  rx: 8;
  fill: var(--panel-2);
  stroke: var(--border);
  stroke-width: 1.5;
  transition: fill 0.3s, stroke 0.3s;
}

.node-label {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  transition: fill 0.3s;
}

.node-icon {
  font-size: 13px;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}

/* Node states */
.node--idle .node-bg { fill: var(--panel-2); stroke: var(--border); }
.node--idle .node-label { fill: var(--muted); }

.node--active .node-bg {
  fill: rgba(99, 102, 241, 0.15);
  stroke: var(--accent);
  stroke-width: 2;
}
.node--active .node-label { fill: var(--accent); }
.node--active { filter: drop-shadow(0 0 8px var(--accent-glow)); animation: node-pulse 1.5s ease-in-out infinite; }

.node--complete .node-bg {
  fill: rgba(16, 185, 129, 0.12);
  stroke: var(--success);
  stroke-width: 2;
}
.node--complete .node-label { fill: var(--success); }

.node--error .node-bg { fill: rgba(239, 68, 68, 0.12); stroke: var(--error); }
.node--error .node-label { fill: var(--error); }

/* Arrows */
.flow-arrow {
  stroke: var(--border);
  stroke-width: 1.5;
  fill: none;
  marker-end: url(#arrow-idle);
  transition: stroke 0.3s;
}

.flow-arrow--active {
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 8 4;
  animation: dash-flow 0.5s linear infinite;
  marker-end: url(#arrow-active);
}

.flow-arrow--complete {
  stroke: var(--success);
  stroke-width: 2;
}

@keyframes dash-flow {
  to { stroke-dashoffset: -12; }
}

@keyframes node-pulse {
  0%, 100% { filter: drop-shadow(0 0 6px var(--accent-glow)); }
  50% { filter: drop-shadow(0 0 16px var(--accent-glow)); }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Center Panel: Data + Info ──────────────────────────────────────────────*/

.center-panel {
  display: grid;
  grid-template-rows: 1fr 200px;
  background: var(--bg);
  min-width: 0;
}

.data-panel {
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.data-panel-header {
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.data-panel-title { display: flex; align-items: center; gap: 8px; }
.data-panel-subsystem {
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.data-scroll {
  flex: 1;
  overflow: auto;
  padding: 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.json-view {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  white-space: pre;
  color: var(--text);
}

.json-key { color: var(--code-key); }
.json-str { color: var(--code-string); }
.json-num { color: var(--code-number); }
.json-bool { color: var(--code); }
.json-null { color: var(--muted); }

/* Info panel */

.info-panel {
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.info-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.info-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.info-desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.65;
  white-space: pre-line;
  font-family: var(--font-ui);
}

.info-next {
  font-size: 11px;
  color: var(--accent);
  margin-top: 8px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

/* ── Event Log Panel (right) ────────────────────────────────────────────────*/

.log-panel {
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.log-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  font-family: var(--font-mono);
  font-size: 11px;
}

.log-entry {
  display: flex;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 4px;
  line-height: 1.45;
  transition: background 0.1s;
  animation: slideInUp 0.15s ease-out;
}

.log-entry:hover { background: var(--panel-2); }

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.log-icon { flex-shrink: 0; width: 16px; }

.log-time {
  color: var(--muted);
  flex-shrink: 0;
  opacity: 0.7;
}

.log-subsystem {
  color: var(--accent);
  flex-shrink: 0;
  min-width: 80px;
  font-weight: 600;
}

.log-msg { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.log-entry--complete .log-msg { color: var(--success); }
.log-entry--error .log-msg { color: var(--error); }
.log-entry--info .log-msg { color: var(--muted); }
.log-entry--complete_final .log-msg { color: var(--warning); font-weight: 700; }

/* Progress bar */
.progress-bar-wrap {
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
  margin: 8px 10px;
  display: none;
}
.progress-bar-wrap.visible { display: block; }
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 1px;
  transition: width 0.15s ease;
  width: 0%;
}

/* Batch counter */
.batch-counter {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  padding: 8px;
  display: none;
}
.batch-counter.visible { display: block; animation: count-pulse 0.15s ease; }
@keyframes count-pulse {
  from { transform: scale(1.15); }
  to   { transform: scale(1); }
}

/* Scenario complete banner */
.complete-banner {
  display: none;
  padding: 12px 14px;
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(99,102,241,0.1));
  border: 1px solid var(--success);
  border-radius: 8px;
  margin: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  color: var(--success);
  animation: fadeIn 0.3s ease;
}
.complete-banner.visible { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  gap: 12px;
  text-align: center;
  padding: 20px;
}
.empty-state-icon { font-size: 32px; opacity: 0.5; }
.empty-state-title { font-size: 13px; font-weight: 600; }
.empty-state-desc { font-size: 12px; line-height: 1.6; }

/* Scrollbars */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #4a5568; }

/* Responsive */
@media (max-width: 900px) {
  .main { grid-template-columns: 240px 1fr; }
  .log-panel { display: none; }
}