:root[data-theme="ocean"] {
  --bg-deep: #071321;
  --bg-panel: #0d1e33;
  --bg-card: #132742;
  --accent: #00d2ff;
  --accent-glow: rgba(0, 210, 255, 0.15);
  --text-main: #e2f1f8;
  --text-muted: #88a3b8;
  --border: #1b3554;
  --green: #00e676;
  --red: #ff5252;
  --warning: #ffab00;
}

:root[data-theme="violet"] {
  --bg-deep: #0f0c1b;
  --bg-panel: #18142b;
  --bg-card: #221c3b;
  --accent: #9d4edd;
  --accent-glow: rgba(157, 78, 221, 0.15);
  --text-main: #f1e8fc;
  --text-muted: #9c8fb8;
  --border: #2e264f;
  --green: #00e676;
  --red: #ff5252;
  --warning: #ffab00;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background: var(--bg-deep); color: var(--text-main); line-height: 1.5; min-height: 100vh; display: flex; flex-direction: column; }

/* Topbar */
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; background: var(--bg-panel); border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.brand-mark { width: 32px; height: 32px; background: linear-gradient(135deg, var(--accent), #0072ff); color: #fff; display: flex; align-items: center; justify-content: center; border-radius: 8px; font-weight: bold; }
.brand b { display: block; font-size: 1.05rem; line-height: 1.1; }
.brand small { font-size: 0.75rem; color: var(--text-muted); }

.top-actions { display: flex; align-items: center; gap: 12px; }
.pill { padding: 4px 10px; border-radius: 12px; font-size: 0.75rem; background: var(--bg-card); border: 1px solid var(--border); color: var(--text-muted); }
.pill.safe { background: rgba(0, 230, 118, 0.1); border-color: rgba(0, 230, 118, 0.3); color: var(--green); }
.pill.version-pill { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); font-weight: bold; }
.icon-btn { background: none; border: 1px solid var(--border); color: var(--text-main); width: 32px; height: 32px; border-radius: 8px; cursor: pointer; }

/* Layout Shell */
.shell { display: flex; flex: 1; }
.sidebar { width: 240px; background: var(--bg-panel); border-right: 1px solid var(--border); padding: 20px 16px; display: flex; flex-direction: column; justify-content: space-between; }
.sidebar nav { display: flex; flex-direction: column; gap: 6px; }
.sidebar small { font-size: 0.7rem; color: var(--text-muted); letter-spacing: 1px; margin: 16px 0 6px 8px; }
.sidebar a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: all 0.2s; }
.sidebar a:hover, .sidebar a.active { background: var(--bg-card); color: var(--text-main); border-left: 3px solid var(--accent); }
.side-foot { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }

/* Main Content */
main { flex: 1; padding: 24px; display: flex; flex-direction: column; gap: 24px; max-width: 1400px; margin: 0 auto; width: 100%; }

/* Page Head */
.page-head { display: flex; justify-content: space-between; align-items: flex-end; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.kicker { font-size: 0.75rem; color: var(--accent); letter-spacing: 1px; font-weight: bold; }
.page-head h1 { font-size: 1.8rem; font-weight: 700; margin: 4px 0; }
.page-head p { font-size: 0.9rem; color: var(--text-muted); }
.status-block { text-align: right; }
.status-block span { display: block; font-size: 0.8rem; color: var(--text-muted); }
.status-block b { font-size: 0.9rem; color: var(--green); }

/* Metrics */
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.metrics article { background: var(--bg-panel); border: 1px solid var(--border); padding: 16px; border-radius: 12px; display: flex; flex-direction: column; gap: 4px; }
.metrics span { font-size: 0.8rem; color: var(--text-muted); }
.metrics strong { font-size: 1.4rem; color: var(--text-main); font-weight: 700; }
.metrics small { font-size: 0.75rem; color: var(--accent); }

/* Quotes Grid */
.market-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.quote { background: var(--bg-panel); border: 1px solid var(--border); padding: 16px; border-radius: 12px; }
.quote-head { display: flex; justify-content: space-between; margin-bottom: 8px; }
.quote-head .label { font-weight: bold; }
.quote-head .live { font-size: 0.7rem; color: var(--green); background: rgba(0,230,118,0.1); padding: 2px 6px; border-radius: 4px; }
.quote strong { font-size: 1.6rem; display: block; margin-bottom: 8px; }
.quote footer { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); }

/* Panels */
.panel { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; }
.panel-head h2 { font-size: 1.2rem; font-weight: 600; }

/* Options Panel */
.tab-controls { display: flex; gap: 8px; }
.tab-btn { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-muted); padding: 6px 14px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: bold; }

.options-summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.opt-card { background: var(--bg-card); border: 1px solid var(--border); padding: 14px; border-radius: 8px; display: flex; flex-direction: column; gap: 4px; }
.opt-card.highlight { border-color: var(--accent); background: var(--accent-glow); }
.opt-card span { font-size: 0.75rem; color: var(--text-muted); }
.opt-card strong { font-size: 1.2rem; font-weight: bold; }
.opt-card small { font-size: 0.7rem; color: var(--text-muted); }

.strike-rec-box { background: var(--bg-card); border: 1px dashed var(--accent); padding: 16px; border-radius: 8px; display: flex; flex-direction: column; gap: 8px; }
.rec-head { display: flex; justify-content: space-between; align-items: center; }

/* Workspace Grids */
.workspace { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
.bottom-workspace { grid-template-columns: 1fr 1fr; }
.bottom-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }

/* Signal List */
.signal { background: var(--bg-card); border: 1px solid var(--border); padding: 14px; border-radius: 8px; display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.signal-head { display: flex; justify-content: space-between; align-items: center; }
.signal p { font-size: 0.85rem; color: var(--text-muted); }

/* Buttons & Inputs */
button.primary { background: linear-gradient(135deg, var(--accent), #0072ff); border: none; color: #fff; padding: 8px 16px; border-radius: 8px; cursor: pointer; font-weight: bold; font-size: 0.85rem; }
button.secondary { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-main); padding: 8px 16px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; }
.btn-group { display: flex; gap: 8px; }

/* Simulations & Analytics */
.sim-card { background: var(--bg-card); border: 1px solid var(--border); padding: 12px; border-radius: 8px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.sim-pnl.pos { color: var(--green); }
.sim-pnl.neg { color: var(--red); }

.analytics-stats { display: flex; justify-content: space-around; background: var(--bg-card); padding: 14px; border-radius: 8px; text-align: center; }
.analytics-stats span { font-size: 0.75rem; color: var(--text-muted); display: block; }
.analytics-stats b { font-size: 1.3rem; }

.rejection-box { background: var(--bg-card); border: 1px solid var(--border); padding: 12px; border-radius: 8px; }
.histogram-list { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; display: flex; flex-direction: column; gap: 4px; }
.hist-item { display: flex; justify-content: space-between; border-bottom: 1px solid var(--border); padding: 2px 0; }

.alert-list { display: flex; flex-direction: column; gap: 8px; max-height: 220px; overflow-y: auto; }
.alert-item { background: var(--bg-card); border-left: 3px solid var(--accent); padding: 8px 12px; border-radius: 4px; display: flex; flex-direction: column; font-size: 0.8rem; }
.alert-item.warning { border-left-color: var(--warning); }
.alert-item.critical { border-left-color: var(--red); }

.risk-list div { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
.risk-list b { color: var(--green); }
.empty-state { text-align: center; padding: 24px; color: var(--text-muted); display: flex; flex-direction: column; align-items: center; gap: 8px; }

footer { padding: 16px 24px; background: var(--bg-panel); border-top: 1px solid var(--border); display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); }