/* ==========================================================================
   ModelPilot — Minimalist Stylesheet with Dark Mode
   Typography: Inter + JetBrains Mono
   ========================================================================== */

:root {
  --bg-main: #fafafa;
  --surface: #ffffff;
  --surface-subtle: #f5f5f5;
  --surface-sunken: #f9f9f9;
  --border: #e5e5e5;
  --border-light: #f0f0f0;
  --border-focus: #171717;
  --text-title: #171717;
  --text-body: #333333;
  --text-muted: #666666;
  --text-faint: #999999;
  --accent: #171717;
  --accent-soft: #f5f5f5;
  --tier1: #16a34a;
  --tier1-soft: #f0fdf4;
  --tier1-border: #bbf7d0;
  --tier2: #d97706;
  --tier2-soft: #fffbeb;
  --tier2-border: #fde68a;
  --tier3: #7c3aed;
  --tier3-soft: #f5f3ff;
  --tier3-border: #ddd6fe;
  --danger: #dc2626;
  --success: #16a34a;
  --radius-xl: 10px;
  --radius-lg: 8px;
  --radius-md: 6px;
  --radius-sm: 4px;
  --radius-full: 9999px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;
}

[data-theme="dark"] {
  --bg-main: #0a0a0a;
  --surface: #171717;
  --surface-subtle: #262626;
  --surface-sunken: #1a1a1a;
  --border: #2e2e2e;
  --border-light: #242424;
  --border-focus: #e5e5e5;
  --text-title: #f5f5f5;
  --text-body: #d4d4d4;
  --text-muted: #737373;
  --text-faint: #525252;
  --accent: #e5e5e5;
  --accent-soft: #262626;
  --tier1: #4ade80;
  --tier1-soft: #052e16;
  --tier1-border: #166534;
  --tier2: #fbbf24;
  --tier2-soft: #422006;
  --tier2-border: #92400e;
  --tier3: #a78bfa;
  --tier3-soft: #1e1040;
  --tier3-border: #4c1d95;
  --danger: #f87171;
  --success: #4ade80;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; height: 100%; }
body {
  min-height: 100%;
  background: var(--bg-main);
  color: var(--text-body);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: var(--text-title); color: var(--bg-main); }
.mono { font-family: var(--font-mono); }
#bg-canvas { display: none; }

.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 32px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 0 0 12px;
  border-bottom: 1px solid var(--border);
}
.navbar-brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { display: grid; place-items: center; }
.brand-info { display: flex; flex-direction: column; gap: 1px; }
.brand-name-wrap { display: flex; align-items: center; gap: 8px; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: -0.03em; color: var(--text-title); line-height: 1.15; }
.status-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px; border-radius: var(--radius-full);
  font-size: 10px; font-weight: 600;
  background: var(--surface-subtle); color: var(--text-muted); border: 1px solid var(--border);
}
.pulse-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--success); }
.brand-tagline { font-size: 12px; color: var(--text-muted); font-weight: 400; }
.navbar-actions { display: flex; align-items: center; gap: 10px; }
.navbar-metrics { display: flex; gap: 8px; flex-wrap: wrap; }
.navbar-btns { display: flex; gap: 4px; }
.btn-icon {
  display: grid; place-items: center; width: 32px; height: 32px;
  border-radius: var(--radius-md); border: 1px solid var(--border);
  background: var(--surface); color: var(--text-muted); cursor: pointer;
  transition: all 0.15s ease;
}
.btn-icon:hover { border-color: var(--text-title); color: var(--text-title); }
.metric-pill {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 6px 14px; min-width: 90px;
}
.metric-pill-highlight { background: var(--surface); border-color: var(--border); }
.metric-pill-label { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.metric-pill-val { font-size: 15px; font-weight: 600; color: var(--text-title); letter-spacing: -0.02em; }

/* Workspace */
.studio-workspace {
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  flex: 1;
  min-height: 0;
}
.studio-sidebar { display: flex; flex-direction: column; gap: 16px; }
.studio-canvas { min-width: 0; display: flex; flex-direction: column; max-height: calc(100vh - 130px); }

/* Cards */
.studio-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.card-heading { display: flex; align-items: center; gap: 8px; }
.card-heading h3 { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.heading-icon {
  display: grid; place-items: center; width: 24px; height: 24px;
  border-radius: var(--radius-sm); background: var(--surface-subtle);
  color: var(--text-muted); flex-shrink: 0;
}
.heading-icon.fleet-icon { background: var(--tier1-soft); color: var(--tier1); }

/* Prompt */
.prompt-meta-wrap { display: flex; align-items: center; gap: 5px; }
.meta-pill { font-size: 10px; font-weight: 500; color: var(--text-muted); background: var(--surface-subtle); padding: 2px 7px; border-radius: var(--radius-full); border: 1px solid var(--border-light); }
.btn-clean {
  display: grid; place-items: center; width: 22px; height: 22px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text-muted); cursor: pointer; transition: all 0.15s ease;
}
.btn-clean:hover { background: #fef2f2; color: var(--danger); border-color: #fecaca; }
.textarea-box { width: 100%; }
.studio-textarea {
  width: 100%; min-height: 130px; resize: vertical; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-md);
  font-family: var(--font-sans); font-size: 13.5px; line-height: 1.55;
  color: var(--text-title); background: var(--surface); transition: border-color 0.15s ease;
}
.studio-textarea:focus { outline: none; border-color: var(--border-focus); }
.studio-textarea::placeholder { color: var(--text-faint); }

/* Presets */
.preset-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: 10px 0 12px; }
.preset-label { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; }
.preset-pill {
  display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px;
  border-radius: var(--radius-full); border: 1px solid var(--border);
  background: var(--surface); color: var(--text-body); font-family: var(--font-sans);
  font-size: 11.5px; font-weight: 500; cursor: pointer; transition: all 0.15s ease;
}
.preset-pill:hover { border-color: var(--text-title); color: var(--text-title); }
.preset-pill.active { border-color: var(--text-title); background: var(--text-title); color: #fff; }
.preset-dot { width: 6px; height: 6px; border-radius: 50%; }
.preset-dot.t1 { background: var(--tier1); }
.preset-dot.t2 { background: var(--tier2); }
.preset-dot.t3 { background: var(--tier3); }

/* Meter */
.routing-meter-box { background: var(--surface-sunken); border: 1px solid var(--border-light); border-radius: var(--radius-md); padding: 12px 14px; margin-bottom: 12px; }
.meter-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.meter-score-row { display: flex; align-items: baseline; gap: 6px; }
.meter-label { font-size: 10px; font-weight: 600; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.04em; }
.meter-score-val { font-size: 20px; font-weight: 700; color: var(--text-title); letter-spacing: -0.03em; }
.meter-max { font-size: 11px; color: var(--text-muted); font-weight: 400; }
.tier-badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: var(--radius-full); font-size: 10px; font-weight: 600; }
.tier-badge.tier-1 { background: var(--tier1-soft); color: var(--tier1); border: 1px solid var(--tier1-border); }
.tier-badge.tier-2 { background: var(--tier2-soft); color: var(--tier2); border: 1px solid var(--tier2-border); }
.tier-badge.tier-3 { background: var(--tier3-soft); color: var(--tier3); border: 1px solid var(--tier3-border); }
.meter-track { position: relative; height: 5px; border-radius: var(--radius-full); background: var(--border-light); overflow: hidden; margin-bottom: 9px; }
.meter-fill { position: absolute; inset: 0 auto 0 0; height: 100%; border-radius: var(--radius-full); transition: width 0.4s ease; }
.meter-fill.tier-1 { background: var(--tier1); }
.meter-fill.tier-2 { background: var(--tier2); }
.meter-fill.tier-3 { background: var(--tier3); }
.meter-tick { position: absolute; top: 0; bottom: 0; width: 1px; background: rgba(0,0,0,0.1); }
.meter-destination { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--text-body); }
.dest-label { color: var(--text-muted); font-size: 11px; }
.dest-model { font-weight: 600; color: var(--text-title); font-size: 12px; }
.dest-price { margin-left: auto; font-size: 10px; font-weight: 500; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-full); padding: 1.5px 7px; color: var(--text-muted); }
.signals-wrap { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border-light); }
.signals-list { display: flex; flex-wrap: wrap; gap: 4px; }
.signal-pill { display: inline-flex; align-items: center; gap: 3px; padding: 2px 7px; border-radius: var(--radius-full); font-size: 10px; font-weight: 500; border: 1px solid var(--border); color: var(--text-muted); background: var(--surface); }
.signal-pill.matched { border-color: #a3a3a3; background: var(--surface-subtle); color: var(--text-title); font-weight: 600; }
.signal-pill.matched::before { content: "\2713"; font-weight: 700; color: var(--text-title); }

/* Buttons */
.btn-group { display: flex; gap: 8px; }
.btn-route {
  flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border: 1px solid var(--text-title); border-radius: var(--radius-md);
  background: var(--text-title); color: var(--bg-main); font-family: var(--font-sans);
  font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all 0.15s ease;
}
.btn-route:hover:not(:disabled) { opacity: 0.85; }
.btn-route:active:not(:disabled) { opacity: 0.7; }
.btn-route-text { display: inline-flex; align-items: center; gap: 7px; }
.btn-compare {
  display: grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--border); border-radius: var(--radius-md);
  background: var(--surface); color: var(--text-muted); cursor: pointer; transition: all 0.15s ease;
}
.btn-compare:hover { border-color: var(--text-title); color: var(--text-title); }
.btn-compare.active { background: var(--tier3-soft); border-color: var(--tier3); color: var(--tier3); }
.btn-spinner { display: none; width: 15px; height: 15px; border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.7s linear infinite; }
.btn-route.is-loading .btn-spinner { display: inline-block; }
.btn-route.is-loading .btn-route-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.btn-sm { padding: 4px 10px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--surface); color: var(--text-muted); font-family: var(--font-sans); font-size: 11px; font-weight: 500; cursor: pointer; transition: all 0.15s ease; }
.btn-sm:hover { border-color: var(--text-title); color: var(--text-title); }
.shortcut-caption { text-align: center; margin-top: 6px; font-size: 10px; color: var(--text-faint); }
kbd { display: inline-block; padding: 1px 4px; font-size: 9.5px; font-family: var(--font-mono); font-weight: 500; color: var(--text-muted); background: var(--surface-subtle); border: 1px solid var(--border); border-radius: 3px; }

/* Fleet */
.fleet-active-tag { padding: 2px 7px; border-radius: var(--radius-full); font-size: 10px; font-weight: 600; color: var(--tier1); background: var(--tier1-soft); border: 1px solid var(--tier1-border); }
.fleet-container { display: flex; flex-direction: column; gap: 6px; }
.fleet-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--border-light); border-radius: var(--radius-md); background: var(--surface-sunken); transition: all 0.15s ease; }
.fleet-row:hover { background: var(--surface); border-color: var(--border); }
.fleet-row.active-tier-1 { border-color: var(--tier1); background: var(--tier1-soft); }
.fleet-row.active-tier-2 { border-color: var(--tier2); background: var(--tier2-soft); }
.fleet-row.active-tier-3 { border-color: var(--tier3); background: var(--tier3-soft); }
.tier-tag { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: var(--radius-sm); font-size: 9px; font-weight: 700; }
.tier-tag.t1 { background: var(--tier1-soft); color: var(--tier1); }
.tier-tag.t2 { background: var(--tier2-soft); color: var(--tier2); }
.tier-tag.t3 { background: var(--tier3-soft); color: var(--tier3); }
.fleet-details { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.fleet-name-line { display: flex; align-items: center; gap: 6px; }
.fleet-name { font-size: 12px; font-weight: 600; color: var(--text-title); }
.fleet-type { font-size: 10px; color: var(--text-muted); }
.fleet-model-id { font-size: 10px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fleet-rate { font-size: 11px; font-weight: 600; color: var(--text-body); }
.fleet-rate small { font-size: 9px; color: var(--text-muted); }

/* Canvas Card */
.canvas-card {
  display: flex; flex-direction: column; padding: 22px 24px;
  transition: min-height 0.3s ease; flex: 1; min-height: 0; overflow: hidden;
}
.canvas-card.is-empty, .canvas-card.is-loading { min-height: 500px; }
.canvas-card.has-response { min-height: 240px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
.canvas-card.has-response::-webkit-scrollbar { width: 5px; }
.canvas-card.has-response::-webkit-scrollbar-track { background: transparent; }
.canvas-card.has-response::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.canvas-card.has-response .markdown-article { margin: auto 0; }
.canvas-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--border-light); flex-wrap: wrap; }
.canvas-meta-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.active-model-badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: var(--radius-full); background: var(--surface-subtle); border: 1px solid var(--border); }
.active-model-badge.tier-1 { background: var(--tier1-soft); border-color: var(--tier1-border); }
.active-model-badge.tier-2 { background: var(--tier2-soft); border-color: var(--tier2-border); }
.active-model-badge.tier-3 { background: var(--tier3-soft); border-color: var(--tier3-border); }
.model-led { width: 6px; height: 6px; border-radius: 50%; background: var(--text-faint); }
.active-model-badge.tier-1 .model-led { background: var(--tier1); }
.active-model-badge.tier-2 .model-led { background: var(--tier2); }
.active-model-badge.tier-3 .model-led { background: var(--tier3); }
.active-model-title { font-size: 12px; font-weight: 600; color: var(--text-title); }
.telemetry-chips { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.tele-chip { padding: 2px 8px; border-radius: var(--radius-full); font-size: 11px; font-weight: 500; background: var(--surface-subtle); border: 1px solid var(--border-light); color: var(--text-body); }
.canvas-actions { display: flex; align-items: center; gap: 6px; }
.savings-chip { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: var(--radius-full); background: var(--tier1-soft); border: 1px solid var(--tier1-border); color: var(--tier1); font-size: 11px; font-weight: 600; }
.btn-copy-resp { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--surface); color: var(--text-body); font-family: var(--font-sans); font-size: 11.5px; font-weight: 500; cursor: pointer; transition: all 0.15s ease; }
.btn-copy-resp:hover { border-color: var(--text-title); color: var(--text-title); }

/* Empty & Loading */
.canvas-empty, .canvas-loading { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 60px 24px; text-align: center; }
.empty-halo { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 12px; background: var(--surface-subtle); border: 1px solid var(--border-light); color: var(--text-muted); margin-bottom: 4px; }
.canvas-empty h4 { font-size: 15px; font-weight: 600; color: var(--text-title); letter-spacing: -0.015em; }
.canvas-empty p { font-size: 13px; color: var(--text-muted); max-width: 380px; line-height: 1.6; font-weight: 400; }
.loading-rings { position: relative; width: 40px; height: 40px; display: grid; place-items: center; margin-bottom: 6px; }
.ring-orbit { position: absolute; inset: 0; border: 2px solid transparent; border-top-color: var(--text-title); border-right-color: var(--text-faint); border-radius: 50%; animation: spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite; }
.ring-orbit.ring-2 { inset: 6px; border-top-color: var(--text-muted); border-left-color: var(--text-faint); animation: spinReverse 1.5s cubic-bezier(0.5, 0, 0.5, 1) infinite; }
.ring-center { width: 8px; height: 8px; border-radius: 50%; background: var(--text-title); }
@keyframes spinReverse { to { transform: rotate(-360deg); } }
.loading-text { font-size: 14px; font-weight: 600; color: var(--text-title); letter-spacing: -0.01em; }
.loading-sub { font-size: 11px; color: var(--text-muted); font-family: var(--font-mono); }

/* Markdown */
.markdown-article { width: 100%; color: var(--text-body); font-size: 14px; line-height: 1.75; }
.markdown-article h1, .markdown-article h2, .markdown-article h3, .markdown-article h4 { margin: 1.4em 0 0.4em; font-weight: 700; letter-spacing: -0.02em; line-height: 1.3; color: var(--text-title); }
.markdown-article h1 { font-size: 1.5em; border-bottom: 1px solid var(--border-light); padding-bottom: 6px; }
.markdown-article h2 { font-size: 1.3em; }
.markdown-article h3 { font-size: 1.15em; }
.markdown-article p { margin: 0.6em 0; }
.markdown-article ul, .markdown-article ol { margin: 0.6em 0; padding-left: 1.4em; }
.markdown-article li { margin: 0.3em 0; }
.markdown-article strong { color: var(--text-title); font-weight: 700; }
.markdown-article code:not(pre code) { font-family: var(--font-mono); font-size: 0.87em; background: var(--surface-subtle); border: 1px solid var(--border-light); border-radius: 3px; padding: 1px 5px; color: var(--text-title); font-weight: 500; }
.markdown-article table { width: 100%; border-collapse: collapse; margin: 16px 0; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; font-size: 13px; }
.markdown-article th, .markdown-article td { padding: 9px 14px; border: 1px solid var(--border-light); text-align: left; line-height: 1.5; }
.markdown-article th { background: var(--surface-subtle); font-weight: 600; color: var(--text-title); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.markdown-article tr:nth-child(even) td { background: var(--surface-sunken); }
.markdown-article table td:first-child { font-weight: 600; color: var(--text-title); }

/* Code Blocks */
.code-frame { margin: 14px 0; border-radius: var(--radius-md); border: 1px solid var(--border); background: #171717; overflow: hidden; }
.code-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 14px; background: #262626; border-bottom: 1px solid #404040; }
.code-lang-badge { font-family: var(--font-mono); font-size: 10.5px; font-weight: 600; color: #a3a3a3; text-transform: uppercase; }
.btn-code-copy { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 3px; border: 1px solid #525252; background: transparent; color: #a3a3a3; font-family: var(--font-sans); font-size: 10.5px; font-weight: 500; cursor: pointer; transition: all 0.15s ease; }
.btn-code-copy:hover { background: #404040; color: #fff; border-color: #525252; }
.code-frame pre { margin: 0 !important; padding: 14px 16px !important; background: transparent !important; border: none !important; overflow-x: auto; }
.code-frame pre code { color: #e5e5e5 !important; font-family: var(--font-mono) !important; font-size: 12.5px !important; line-height: 1.6 !important; }

/* Connection Banner */
.connection-banner { display: flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: var(--radius-md); background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; font-size: 12px; font-weight: 500; }
.banner-link { background: none; border: none; color: #991b1b; font-weight: 700; cursor: pointer; text-decoration: underline; }
[data-theme="dark"] .connection-banner { background: #450a0a; border-color: #7f1d1d; color: #fca5a5; }
[data-theme="dark"] .banner-link { color: #fca5a5; }

/* Toasts */
#toast-stack { position: fixed; bottom: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 6px; max-width: 340px; }
.toast { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: var(--radius-md); background: var(--surface); border: 1px solid var(--border); box-shadow: 0 2px 8px rgba(0,0,0,0.06); font-size: 12px; font-weight: 500; color: var(--text-title); animation: toastIn 0.25s ease; }
.toast.leaving { animation: toastOut 0.2s ease forwards; }
.toast-error { border-left: 3px solid var(--danger); }
.toast-success { border-left: 3px solid var(--success); }
.toast-info { border-left: 3px solid var(--text-muted); }
@keyframes toastIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(6px); } }

/* History Section */
.history-section { margin-top: 0; }
.logs-table-wrap { overflow-x: auto; }
.logs-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.logs-table th { padding: 8px 10px; text-align: left; font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); border-bottom: 1px solid var(--border); background: var(--surface-sunken); }
.logs-table td { padding: 8px 10px; border-bottom: 1px solid var(--border-light); color: var(--text-body); }
.logs-table tr:hover td { background: var(--surface-sunken); }
.logs-table .logs-empty { text-align: center; color: var(--text-muted); padding: 24px; font-style: italic; }
.logs-table .prompt-cell { max-width: 280px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 12px; }
.logs-table .tier-cell { font-weight: 600; }
.logs-table .fav-btn { background: none; border: none; cursor: pointer; font-size: 14px; color: var(--text-faint); transition: color 0.15s; padding: 0; }
.logs-table .fav-btn:hover, .logs-table .fav-btn.active { color: var(--tier2); }

/* Compare Mode */
.compare-container { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px 20px; margin-bottom: 16px; }
.compare-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.compare-header h3 { font-size: 13px; font-weight: 600; color: var(--text-title); }
.compare-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; }
.compare-divider { width: 1px; background: var(--border); margin: 0 16px; }
.compare-panel { display: flex; flex-direction: column; }
.compare-panel-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.compare-panel-body { flex: 1; font-size: 13px; line-height: 1.7; color: var(--text-body); overflow-y: auto; max-height: 400px; scrollbar-width: thin; }
.compare-placeholder { color: var(--text-muted); font-style: italic; text-align: center; padding: 40px 0; }

/* Command Palette */
.command-palette-overlay { position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,0.4); display: grid; place-items: start center; padding-top: 15vh; }
[data-theme="dark"] .command-palette-overlay { background: rgba(0,0,0,0.7); }
.command-palette { width: 90%; max-width: 540px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 16px 48px rgba(0,0,0,0.15); overflow: hidden; }
.cmd-search-row { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.cmd-input { flex: 1; border: none; background: transparent; font-family: var(--font-sans); font-size: 14px; color: var(--text-title); outline: none; }
.cmd-input::placeholder { color: var(--text-faint); }
.cmd-esc { font-size: 10px; }
.cmd-results { max-height: 320px; overflow-y: auto; }
.cmd-empty { padding: 24px; text-align: center; color: var(--text-muted); font-size: 13px; }
.cmd-item { display: flex; align-items: center; gap: 10px; padding: 10px 16px; cursor: pointer; transition: background 0.1s; border-bottom: 1px solid var(--border-light); }
.cmd-item:hover, .cmd-item.active { background: var(--surface-sunken); }
.cmd-item-prompt { flex: 1; font-size: 13px; color: var(--text-body); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmd-item-meta { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.cmd-item-tier { font-size: 10px; font-weight: 600; padding: 1px 6px; border-radius: var(--radius-full); }
.cmd-item-tier.tier-1 { background: var(--tier1-soft); color: var(--tier1); }
.cmd-item-tier.tier-2 { background: var(--tier2-soft); color: var(--tier2); }
.cmd-item-tier.tier-3 { background: var(--tier3-soft); color: var(--tier3); }
.cmd-item-count { font-size: 10px; color: var(--text-muted); }

/* Settings Modal */
.modal-overlay { position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,0.4); display: grid; place-items: center; }
[data-theme="dark"] .modal-overlay { background: rgba(0,0,0,0.7); }
.modal { width: 90%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 16px 48px rgba(0,0,0,0.15); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 14px; font-weight: 600; color: var(--text-title); }
.modal-body { padding: 20px; }
.setting-group { margin-bottom: 16px; }
.setting-group:last-child { margin-bottom: 0; }
.setting-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-title); margin-bottom: 2px; }
.setting-desc { font-size: 11px; color: var(--text-muted); margin-bottom: 6px; }
.setting-range { width: 100%; accent-color: var(--text-title); }
.setting-val { font-size: 12px; font-family: var(--font-mono); color: var(--text-muted); }
.setting-input { width: 100%; padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius-md); font-family: var(--font-mono); font-size: 13px; color: var(--text-title); background: var(--surface); }
.setting-input:focus { outline: none; border-color: var(--border-focus); }
.api-key-display { font-family: var(--font-mono); font-size: 12px; padding: 8px 10px; background: var(--surface-subtle); border: 1px solid var(--border-light); border-radius: var(--radius-md); color: var(--text-muted); }

/* Footer */
.app-footer { text-align: center; padding: 12px 0 4px; font-size: 11px; color: var(--text-faint); border-top: 1px solid var(--border-light); }

/* Theme Toggle Icons */
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* Responsive */
@media (max-width: 1024px) {
  .studio-workspace { grid-template-columns: 1fr; }
  .studio-canvas { max-height: none; }
  .canvas-card.is-empty, .canvas-card.is-loading { min-height: 320px; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-divider { width: 100%; height: 1px; margin: 12px 0; }
}
@media (max-width: 768px) {
  .app-layout { padding: 16px 16px 32px; }
  .navbar { justify-content: center; text-align: center; }
  .navbar-metrics { justify-content: center; width: 100%; }
  .navbar-actions { width: 100%; justify-content: space-between; }
  .canvas-card { padding: 16px; }
  .logs-table { font-size: 11px; }
  .logs-table th, .logs-table td { padding: 6px 8px; }
}
@media (max-width: 480px) {
  .app-layout { padding: 12px 12px 24px; gap: 16px; }
  .studio-card { padding: 14px 14px; }
  .navbar-metrics { gap: 4px; }
  .metric-pill { min-width: 70px; padding: 4px 8px; }
  .btn-group { flex-direction: column; }
  .btn-compare { width: 100%; height: 36px; }
}