/* ==========================================================================
   Sapientiae — "Signal" Design System & Vehicle Intelligence Advisor Styles
   Direction 02 · Minimal / Clean — "Signal" (Precise, Swiss, instrument-grade)
   ========================================================================== */

:root {
  /* Ink — cool neutrals */
  --ink-950: #0f1115;
  --ink-900: #16181d;
  --ink-850: #1c1f27;
  --ink-800: #23262f;
  --ink-700: #2f333d;
  --ink-600: #3a3d44;
  --ink-500: #5b606b;
  --ink-400: #8b8f98;
  --ink-300: #a8acb4;
  --ink-200: #d4d7dc;
  --ink-150: #e6e8ec;
  --ink-100: #eef0f3;
  --ink-75: #f1f3f6;
  --ink-50: #f7f8fa;
  --white: #ffffff;

  /* Signal — brand blue */
  --signal-50: #eef4ff;
  --signal-100: #dce8ff;
  --signal-200: #bcd3ff;
  --signal-300: #8db4ff;
  --signal-400: #4d8bff;
  --signal-500: #1f6feb;
  --signal-600: #1a63d8;
  --signal-700: #1552b8;
  --signal-800: #123f8a;

  /* Risk scale — semantic, never decorative */
  --risk-low: #12805a;
  --risk-low-soft: #e5f4ed;
  --risk-low-bg: #e5f4ed;
  --risk-moderate: #b26f00;
  --risk-moderate-soft: #fbf0dc;
  --risk-moderate-bg: #fbf0dc;
  --risk-high: #cc2f36;
  --risk-high-soft: #fbe9ea;
  --risk-high-bg: #fbe9ea;

  /* Semantic aliases — light (default) */
  --surface-page: var(--white);
  --surface-sunken: var(--ink-50);
  --surface-raised: var(--white);
  --surface-muted: var(--ink-75);
  --surface-hover: var(--ink-75);
  --surface-active: #e9ecf0;
  --surface-inverse: var(--ink-900);
  --surface-inverse-hover: var(--ink-700);

  --text-primary: var(--ink-900);
  --text-secondary: var(--ink-600);
  --text-tertiary: var(--ink-400);
  --text-placeholder: var(--ink-300);
  --text-inverse: var(--white);
  --text-accent: var(--signal-500);

  --border-subtle: var(--ink-100);
  --border-default: var(--ink-150);
  --border-strong: var(--ink-200);
  --border-color: var(--ink-150);

  --accent: var(--signal-500);
  --accent-color: var(--signal-500);
  --accent-hover: var(--signal-600);
  --accent-press: var(--signal-700);
  --accent-soft: var(--signal-50);
  --accent-line: var(--signal-200);
  --accent-on: var(--white);
  --accent-mark: var(--signal-500);

  --bubble-user-bg: var(--ink-75);
  --bubble-user-fg: var(--ink-900);
  --tooltip-bg: var(--ink-900);
  --tooltip-fg: var(--white);
  --switch-off: var(--ink-200);
  --overlay: rgba(15, 17, 21, 0.42);

  /* Sapientiae type — Hanken Grotesk for voice, IBM Plex Mono for data + labels */
  --font-sans: 'Hanken Grotesk', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 800;

  /* Size scale */
  --fs-display-xl: 56px;
  --fs-display: 44px;
  --fs-h1: 34px;
  --fs-h2: 26px;
  --fs-h3: 20px;
  --fs-h4: 17px;
  --fs-body-lg: 16px;
  --fs-body: 15px;
  --fs-body-sm: 13.5px;
  --fs-caption: 12.5px;
  --fs-micro: 11px;
  --fs-label: 10.5px;

  --lh-tight: 1.08;
  --lh-snug: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.65;

  --tracking-display: -0.035em;
  --tracking-heading: -0.02em;
  --tracking-wordmark: -0.04em;
  --tracking-body: 0;
  --tracking-label: 0.14em;
  --tracking-data: 0.02em;

  /* Semantic roles (font shorthand) */
  --type-display: var(--fw-black) var(--fs-display) / var(--lh-tight) var(--font-sans);
  --type-h1: var(--fw-black) var(--fs-h1) / var(--lh-tight) var(--font-sans);
  --type-h2: var(--fw-bold) var(--fs-h2) / var(--lh-snug) var(--font-sans);
  --type-h3: var(--fw-bold) var(--fs-h3) / var(--lh-snug) var(--font-sans);
  --type-body: var(--fw-regular) var(--fs-body) / var(--lh-relaxed) var(--font-sans);
  --type-ui: var(--fw-medium) var(--fs-body-sm) / 1.3 var(--font-sans);
  --type-label: var(--fw-medium) var(--fs-label) / 1.2 var(--font-mono);
  --type-data: var(--fw-semibold) var(--fs-body-sm) / 1.2 var(--font-mono);

  /* 4px base grid with half-steps for dense UI */
  --space-0: 0;
  --space-0-5: 2px;
  --space-1: 4px;
  --space-1-5: 6px;
  --space-2: 8px;
  --space-2-5: 10px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-9: 48px;
  --space-10: 64px;
  --space-11: 80px;
  --space-12: 120px;

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-2xl: 22px;
  --radius-pill: 999px;
  --radius-app-icon: 22.3%;

  /* Layout */
  --sidebar-width: 272px;
  --header-height: 56px;
  --chat-column: 760px;
  --content-max: 1200px;

  /* Elevation, focus, motion */
  --hairline: inset 0 0 0 1px var(--border-default);
  --hairline-strong: inset 0 0 0 1px var(--border-strong);

  --shadow-xs: 0 1px 2px rgba(20, 22, 28, 0.06);
  --shadow-sm: 0 1px 3px rgba(20, 22, 28, 0.08), 0 1px 2px rgba(20, 22, 28, 0.04);
  --shadow-md: 0 6px 18px rgba(20, 22, 28, 0.08);
  --shadow-lg: 0 16px 40px rgba(20, 22, 28, 0.12);
  --shadow-composer: 0 1px 2px rgba(20, 22, 28, 0.04), 0 10px 32px rgba(20, 22, 28, 0.07);
  --shadow-composer-focus: 0 1px 2px rgba(20, 22, 28, 0.05), 0 14px 40px rgba(20, 22, 28, 0.11);
  --shadow-accent: 0 10px 30px rgba(11, 40, 110, 0.3);
  --shadow-dialog: 0 24px 64px rgba(15, 17, 21, 0.24);

  --focus-ring: 0 0 0 3px rgba(31, 111, 235, 0.28);
  --blur-glass: saturate(180%) blur(14px);

  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 120ms;
  --dur-base: 180ms;
  --dur-slow: 280ms;
}

[data-theme="dark"] {
  --risk-low: #3cc68a;
  --risk-low-soft: rgba(60, 198, 138, 0.14);
  --risk-low-bg: rgba(60, 198, 138, 0.14);
  --risk-moderate: #f0a531;
  --risk-moderate-soft: rgba(240, 165, 49, 0.14);
  --risk-moderate-bg: rgba(240, 165, 49, 0.14);
  --risk-high: #ff6066;
  --risk-high-soft: rgba(255, 96, 102, 0.14);
  --risk-high-bg: rgba(255, 96, 102, 0.14);

  --surface-page: var(--ink-900);
  --surface-sunken: var(--ink-950);
  --surface-raised: var(--ink-850);
  --surface-muted: var(--ink-800);
  --surface-hover: var(--ink-800);
  --surface-active: var(--ink-700);
  --surface-inverse: var(--ink-75);
  --surface-inverse-hover: var(--white);

  --text-primary: #f1f3f6;
  --text-secondary: #c4c8d0;
  --text-tertiary: #7d828c;
  --text-placeholder: #5f646e;
  --text-inverse: var(--ink-900);
  --text-accent: var(--signal-400);

  --border-subtle: #22252d;
  --border-default: #2a2e38;
  --border-strong: #3a3f4a;
  --border-color: #2a2e38;

  --accent: var(--signal-500);
  --accent-color: var(--signal-400);
  --accent-hover: #3a82f5;
  --accent-press: var(--signal-600);
  --accent-soft: rgba(31, 111, 235, 0.16);
  --accent-line: rgba(77, 139, 255, 0.4);
  --accent-on: var(--white);
  --accent-mark: var(--signal-400);

  --bubble-user-bg: var(--ink-800);
  --bubble-user-fg: #f1f3f6;
  --tooltip-bg: var(--ink-75);
  --tooltip-fg: var(--ink-900);
  --switch-off: var(--ink-700);
  --overlay: rgba(0, 0, 0, 0.6);

  --hairline: inset 0 0 0 1px var(--border-default);
  --hairline-strong: inset 0 0 0 1px var(--border-strong);
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
  --shadow-composer: 0 10px 32px rgba(0, 0, 0, 0.35);
  --shadow-composer-focus: 0 14px 40px rgba(0, 0, 0, 0.45);
  --shadow-dialog: 0 24px 64px rgba(0, 0, 0, 0.55);
  --focus-ring: 0 0 0 3px rgba(77, 139, 255, 0.35);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  height: 100%;
}
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background: var(--surface-page);
}
::selection {
  background: var(--signal-200);
  color: var(--ink-900);
}
a {
  color: var(--text-accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}
.hidden {
  display: none !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes sp-spin { to { transform: rotate(360deg); } }
.sp-spin { animation: sp-spin 0.9s linear infinite; transform-origin: center; }
.sp-followups { display: flex; flex-wrap: wrap; gap: 8px; }
.sp-sources { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
@keyframes sp-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes sp-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes sp-fade-up { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes sp-dialog-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }
@keyframes sp-shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
@keyframes sp-drawer-in { from { transform: translateX(24px); opacity: 0; } to { transform: none; opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.sp-btn, .sp-iconbtn, .sp-chip, .sp-nav, .sp-input, .sp-prompt, .sp-composer, .sp-card, .sp-tab, .sp-cite {
  box-sizing: border-box;
}

/* ---------- Logo ---------- */
.sp-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none !important;
  color: var(--text-primary);
}
.sp-logo__wordmark {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 21px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
}
.sp-logo__sub {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 3px;
  white-space: nowrap;
}

/* ---------- Button ---------- */
.sp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--font-sans);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.005em;
  border-radius: var(--radius-md);
  transition: background var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), color var(--dur-fast), transform var(--dur-fast);
}
.sp-btn:hover { text-decoration: none; }
.sp-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.sp-btn:active:not(:disabled) { transform: scale(0.985); }
.sp-btn:disabled { cursor: not-allowed; opacity: 0.45; }
.sp-btn--sm { height: 30px; padding: 0 12px; font-size: 13px; gap: 6px; border-radius: 8px; }
.sp-btn--md { height: 36px; padding: 0 14px; font-size: 14px; }
.sp-btn--lg { height: 44px; padding: 0 20px; font-size: 15px; border-radius: 12px; }
.sp-btn--primary { background: var(--accent); color: var(--accent-on); }
.sp-btn--primary:hover:not(:disabled) { background: var(--accent-hover); }
.sp-btn--primary:active:not(:disabled) { background: var(--accent-press); }
.sp-btn--secondary { background: var(--surface-raised); color: var(--text-primary); box-shadow: var(--hairline); }
.sp-btn--secondary:hover:not(:disabled) { background: var(--surface-hover); box-shadow: var(--hairline-strong); }
.sp-btn--ghost { background: transparent; color: var(--text-secondary); }
.sp-btn--ghost:hover:not(:disabled) { background: var(--surface-hover); color: var(--text-primary); }
.sp-btn--inverse { background: var(--surface-inverse); color: var(--text-inverse); }
.sp-btn--inverse:hover:not(:disabled) { background: var(--surface-inverse-hover); }
.sp-btn--danger { background: var(--risk-high-soft); color: var(--risk-high); }
.sp-btn--danger:hover:not(:disabled) { box-shadow: inset 0 0 0 1px var(--risk-high); }
.sp-btn--full { width: 100%; }
.sp-spin { animation: sp-spin 0.8s linear infinite; }

/* ---------- IconButton ---------- */
.sp-iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  background: transparent;
  color: var(--text-tertiary);
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast), box-shadow var(--dur-fast), transform var(--dur-fast);
}
.sp-iconbtn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.sp-iconbtn:active:not(:disabled) { transform: scale(0.94); }
.sp-iconbtn:disabled { cursor: not-allowed; }
.sp-iconbtn--sm { width: 28px; height: 28px; border-radius: 7px; }
.sp-iconbtn--md { width: 34px; height: 34px; border-radius: 9px; }
.sp-iconbtn--lg { width: 40px; height: 40px; border-radius: 11px; }
.sp-iconbtn--circle { border-radius: var(--radius-pill); }
.sp-iconbtn--ghost:hover:not(:disabled) { background: var(--surface-hover); color: var(--text-primary); }
.sp-iconbtn--ghost.is-active { background: var(--accent-soft); color: var(--text-accent); }
.sp-iconbtn--ghost:disabled { opacity: 0.4; }
.sp-iconbtn--secondary { background: var(--surface-raised); color: var(--text-secondary); box-shadow: var(--hairline); }
.sp-iconbtn--secondary:hover:not(:disabled) { color: var(--text-primary); box-shadow: var(--hairline-strong); background: var(--surface-hover); }
.sp-iconbtn--primary { background: var(--accent); color: var(--accent-on); }
.sp-iconbtn--primary:hover:not(:disabled) { background: var(--accent-hover); }
.sp-iconbtn--primary:disabled { background: var(--surface-muted); color: var(--text-placeholder); }
.sp-iconbtn--inverse { background: var(--surface-inverse); color: var(--text-inverse); }
.sp-iconbtn--inverse:hover:not(:disabled) { background: var(--surface-inverse-hover); }

/* ---------- Badge ---------- */
.sp-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 20px;
  padding: 0 8px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1;
  color: var(--text-secondary);
  background: var(--surface-muted);
}
.sp-badge--lg { height: 24px; padding: 0 10px; font-size: 11px; }
.sp-badge--accent { color: var(--text-accent); background: var(--accent-soft); }
.sp-badge--low { color: var(--risk-low); background: var(--risk-low-soft); }
.sp-badge--moderate { color: var(--risk-moderate); background: var(--risk-moderate-soft); }
.sp-badge--high { color: var(--risk-high); background: var(--risk-high-soft); }
.sp-badge--solid { background: var(--accent); color: var(--accent-on); }
.sp-badge__dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }

/* ---------- Chip ---------- */
.sp-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 13px;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  box-shadow: var(--hairline);
  color: var(--text-secondary);
  font: var(--fw-medium) 13px/1 var(--font-sans);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-fast), box-shadow var(--dur-fast), color var(--dur-fast);
}
.sp-chip:hover { background: var(--surface-hover); box-shadow: var(--hairline-strong); color: var(--text-primary); }
.sp-chip:focus-visible { outline: none; box-shadow: var(--hairline-strong), var(--focus-ring); }
.sp-chip.is-selected { background: var(--accent-soft); color: var(--text-accent); box-shadow: inset 0 0 0 1px var(--accent-line); }
.sp-chip--sm { height: 26px; padding: 0 10px; font-size: 12px; gap: 6px; }
.sp-chip__remove { display: inline-flex; margin-right: -5px; padding: 2px; border-radius: var(--radius-pill); opacity: 0.55; transition: opacity var(--dur-fast), background var(--dur-fast); }
.sp-chip__remove:hover { opacity: 1; background: var(--surface-active); }

/* ---------- Card ---------- */
.sp-card { background: var(--surface-raised); border-radius: var(--radius-lg); box-shadow: var(--hairline); color: var(--text-primary); }
.sp-card--sunken { background: var(--surface-sunken); }
.sp-card--elevated { box-shadow: inset 0 0 0 1px var(--border-subtle), var(--shadow-md); }
.sp-card--inverse { background: var(--ink-900); color: #f1f3f6; box-shadow: none; }
.sp-card--interactive { cursor: pointer; transition: box-shadow var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out); }
.sp-card--interactive:hover { box-shadow: var(--hairline-strong), var(--shadow-sm); }

/* ---------- Field / Input / Select ---------- */
.sp-field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.sp-field__label { font: var(--fw-semibold) 12.5px/1.2 var(--font-sans); color: var(--text-primary); }
.sp-field__hint { font-size: 12px; line-height: 1.4; color: var(--text-tertiary); }
.sp-field__hint.is-error { color: var(--risk-high); }
.sp-input {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  background: var(--surface-raised);
  box-shadow: var(--hairline);
  color: var(--text-tertiary);
  transition: box-shadow var(--dur-fast) var(--ease-out);
  position: relative;
}
.sp-input:hover { box-shadow: var(--hairline-strong); }
.sp-input:focus-within { box-shadow: inset 0 0 0 1px var(--accent), var(--focus-ring); }
.sp-input.is-error { box-shadow: inset 0 0 0 1px var(--risk-high); }
.sp-input.is-disabled { opacity: 0.5; background: var(--surface-muted); pointer-events: none; }
.sp-input input, .sp-input select {
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font: var(--fw-regular) 14px/1 var(--font-sans);
  color: var(--text-primary);
}
.sp-input input::placeholder { color: var(--text-placeholder); }
.sp-input--sm { height: 32px; border-radius: 8px; padding: 0 10px; }
.sp-input--sm input, .sp-input--sm select { font-size: 13px; }
.sp-input--lg { height: 48px; border-radius: 12px; padding: 0 14px; }
.sp-input--lg input, .sp-input--lg select { font-size: 15px; }
.sp-input--mono input { font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.sp-select select { appearance: none; -webkit-appearance: none; cursor: pointer; padding-right: 22px; font-weight: var(--fw-medium); }
.sp-select__chev { position: absolute; right: 10px; pointer-events: none; color: var(--text-tertiary); }

/* ---------- Switch ---------- */
.sp-switch {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font: var(--fw-medium) 13.5px/1.3 var(--font-sans);
  color: var(--text-primary);
  user-select: none;
}
.sp-switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.sp-switch__track {
  position: relative;
  flex: none;
  width: 34px;
  height: 20px;
  border-radius: var(--radius-pill);
  background: var(--switch-off);
  transition: background var(--dur-base) var(--ease-out), box-shadow var(--dur-fast);
}
.sp-switch__thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.22);
  transition: transform var(--dur-base) var(--ease-out);
}
.sp-switch.is-on .sp-switch__track,
.sp-switch input:checked + .sp-switch__track { background: var(--accent); }
.sp-switch.is-on .sp-switch__thumb,
.sp-switch input:checked + .sp-switch__track .sp-switch__thumb { transform: translateX(14px); }
.sp-switch input:focus-visible + .sp-switch__track { box-shadow: var(--focus-ring); }
.sp-switch.is-disabled { opacity: 0.45; cursor: not-allowed; }

/* ---------- Tabs ---------- */
.sp-tabs { display: flex; gap: 22px; box-shadow: inset 0 -1px 0 var(--border-default); }
.sp-tab, .auth-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 40px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  font: var(--fw-medium) 13.5px/1 var(--font-sans);
  color: var(--text-tertiary);
  transition: color var(--dur-fast);
  white-space: nowrap;
}
.sp-tab:hover, .auth-tab:hover { color: var(--text-primary); }
.sp-tab:focus-visible, .auth-tab:focus-visible { outline: none; color: var(--text-primary); }
.sp-tab.is-active, .auth-tab.active { color: var(--text-primary); }
.sp-tab.is-active::after, .auth-tab.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.sp-tab__count {
  font: var(--fw-medium) 10.5px/1 var(--font-mono);
  padding: 3px 6px;
  border-radius: var(--radius-pill);
  background: var(--surface-muted);
  color: var(--text-tertiary);
}
.sp-tab.is-active .sp-tab__count { background: var(--accent-soft); color: var(--text-accent); }
.sp-tabs--segmented { display: inline-flex; gap: 2px; padding: 3px; border-radius: 10px; background: var(--surface-muted); box-shadow: none; }
.sp-tabs--segmented .sp-tab { height: 28px; padding: 0 12px; border-radius: 7px; font-size: 13px; }
.sp-tabs--segmented .sp-tab.is-active { background: var(--surface-raised); box-shadow: var(--shadow-xs), inset 0 0 0 1px var(--border-subtle); }
.sp-tabs--segmented .sp-tab.is-active::after { display: none; }

/* ---------- NavItem ---------- */
.sp-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font: var(--fw-medium) 13.5px/1 var(--font-sans);
  color: var(--text-secondary);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.sp-nav:hover { background: var(--surface-hover); color: var(--text-primary); }
.sp-nav:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.sp-nav.is-active { background: var(--surface-active); color: var(--text-primary); }
.sp-nav__icon { flex: none; color: var(--text-tertiary); }
.sp-nav.is-active .sp-nav__icon { color: var(--text-primary); }
.sp-nav__label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sp-nav__trailing { display: inline-flex; align-items: center; gap: 4px; flex: none; color: var(--text-tertiary); opacity: 0; transition: opacity var(--dur-fast); }
.sp-nav:hover .sp-nav__trailing, .sp-nav.is-active .sp-nav__trailing, .sp-nav__trailing.is-pinned { opacity: 1; }

/* ---------- Tooltip ---------- */
.sp-tip-wrap { position: relative; display: inline-flex; }
.sp-tip {
  position: absolute;
  z-index: 60;
  left: 50%;
  pointer-events: none;
  white-space: nowrap;
  padding: 6px 9px;
  border-radius: 7px;
  background: var(--tooltip-bg);
  color: var(--tooltip-fg);
  font: var(--fw-medium) 12px/1.2 var(--font-sans);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.sp-tip--top { bottom: calc(100% + 7px); transform: translate(-50%, 3px); }
.sp-tip--bottom { top: calc(100% + 7px); transform: translate(-50%, -3px); }
.sp-tip-wrap:hover .sp-tip, .sp-tip-wrap:focus-within .sp-tip, .sp-tip.is-open { opacity: 1; transform: translate(-50%, 0); transition-delay: 250ms; }
.sp-tip.is-open { transition-delay: 0ms; }
.sp-tip__kbd { margin-left: 8px; font: var(--fw-medium) 10.5px/1 var(--font-mono); opacity: 0.6; }

/* ---------- Toast ---------- */
.sp-toast-host {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 108px;
  display: flex;
  justify-content: center;
  pointer-events: none;
  z-index: 160;
  padding: 0 16px;
}
.sp-toast {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 360px;
  max-width: 100%;
  box-sizing: border-box;
  padding: 14px 12px 14px 16px;
  border-radius: 12px;
  background: var(--surface-raised);
  box-shadow: inset 0 0 0 1px var(--border-default), var(--shadow-lg);
  animation: sp-fade-up var(--dur-slow) var(--ease-out);
  pointer-events: auto;
}
.sp-toast__icon { flex: none; margin-top: 1px; }
.sp-toast__body { flex: 1; min-width: 0; }
.sp-toast__title { font: var(--fw-semibold) 13.5px/1.35 var(--font-sans); color: var(--text-primary); }
.sp-toast__desc { font: var(--fw-regular) 13px/1.45 var(--font-sans); color: var(--text-secondary); margin-top: 2px; }
.sp-toast__action { margin-top: 8px; }

/* ---------- Dialog ---------- */
.sp-dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 140;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--overlay);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  animation: sp-fade-in var(--dur-base) var(--ease-out);
}
.sp-dialog-backdrop--inline {
  position: relative;
  inset: auto;
  z-index: auto;
  padding: 0;
  background: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.sp-dialog {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 48px);
  overflow: auto;
  box-sizing: border-box;
  background: var(--surface-raised);
  border-radius: var(--radius-xl);
  box-shadow: inset 0 0 0 1px var(--border-subtle), var(--shadow-dialog);
  animation: sp-dialog-in var(--dur-slow) var(--ease-out);
  color: var(--text-primary);
}
.sp-dialog__header { display: flex; align-items: flex-start; gap: 12px; padding: 22px 24px 0; }
.sp-dialog__icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--text-accent);
}
.sp-dialog__title { font: var(--fw-bold) 18px/1.3 var(--font-sans); letter-spacing: -0.01em; margin: 0; color: var(--text-primary); }
.sp-dialog__desc { font: var(--fw-regular) 14px/1.5 var(--font-sans); color: var(--text-secondary); margin: 6px 0 0; }
.sp-dialog__close { margin: -4px -8px 0 auto; }
.sp-dialog__body { padding: 18px 24px; }
.sp-dialog__footer { display: flex; justify-content: flex-end; gap: 8px; padding: 0 24px 22px; }

/* ---------- Message ---------- */
.sp-msg { display: flex; gap: 14px; animation: sp-fade-up var(--dur-slow) var(--ease-out); }
.sp-msg--user { justify-content: flex-end; }
.sp-msg__bubble {
  max-width: 78%;
  padding: 10px 16px;
  border-radius: 20px 20px 6px 20px;
  background: var(--bubble-user-bg);
  color: var(--bubble-user-fg);
  font: var(--fw-regular) 15px/1.5 var(--font-sans);
  white-space: pre-wrap;
  text-wrap: pretty;
  overflow-wrap: anywhere;
}
.sp-msg__bubble--accent { background: var(--accent); color: var(--accent-on); }
.sp-msg__avatar {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-raised);
  box-shadow: var(--hairline);
}
.sp-msg__main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 14px; padding-top: 3px; }
.sp-msg__content {
  font: var(--fw-regular) 15px/1.65 var(--font-sans);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-wrap: pretty;
}
.sp-msg__content p { margin: 0; }
.sp-msg__content strong { font-weight: var(--fw-semibold); color: var(--text-primary); }
.sp-msg__content ul, .sp-msg__content ol { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.sp-msg__caret {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-left: 4px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 1px;
  animation: sp-blink 1s steps(1) infinite;
}
.sp-msg__actions { display: flex; align-items: center; gap: 2px; margin-left: -6px; flex-wrap: wrap; }
.sp-msg__meta { margin-left: 8px; font: var(--fw-medium) 11px/1 var(--font-mono); letter-spacing: 0.02em; color: var(--text-tertiary); }

/* ---------- Composer ---------- */
.sp-composer {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  border-radius: var(--radius-2xl);
  box-shadow: var(--hairline), var(--shadow-composer);
  transition: box-shadow var(--dur-base) var(--ease-out);
}
.sp-composer:focus-within { box-shadow: var(--hairline-strong), var(--shadow-composer-focus); }
.sp-composer__input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  font: var(--fw-regular) 15.5px/1.5 var(--font-sans);
  color: var(--text-primary);
  padding: 15px 18px 2px;
  min-height: 40px;
  max-height: 220px;
}
.sp-composer__input::placeholder { color: var(--text-placeholder); }
.sp-composer--hero .sp-composer__input { font-size: 17px; padding: 20px 22px 4px; min-height: 64px; }
.sp-composer__bar { display: flex; align-items: center; gap: 6px; padding: 8px 10px 10px 12px; flex-wrap: wrap; }
.sp-composer--hero .sp-composer__bar { padding: 10px 12px 12px 14px; }
.sp-composer__spacer { flex: 1; }
.sp-composer__hint { font: var(--fw-medium) 10.5px/1 var(--font-mono); letter-spacing: 0.06em; color: var(--text-tertiary); margin-right: 6px; }

/* ---------- PromptCard ---------- */
.sp-prompt {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px 15px;
  border: 0;
  border-radius: var(--radius-lg);
  background: var(--surface-raised);
  box-shadow: var(--hairline);
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: box-shadow var(--dur-base) var(--ease-out), background var(--dur-base), transform var(--dur-base) var(--ease-out);
}
.sp-prompt:hover { box-shadow: var(--hairline-strong), var(--shadow-sm); transform: translateY(-1px); }
.sp-prompt:focus-visible { outline: none; box-shadow: var(--hairline-strong), var(--focus-ring); }
.sp-prompt__icon {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--text-accent);
}
.sp-prompt__title { font: var(--fw-semibold) 13.5px/1.35 var(--font-sans); color: var(--text-primary); text-wrap: pretty; display: block; }
.sp-prompt__sub { font: var(--fw-regular) 12.5px/1.4 var(--font-sans); color: var(--text-tertiary); margin-top: 3px; text-wrap: pretty; display: block; }
.sp-prompt__tag { font: var(--fw-medium) 9.5px/1 var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-tertiary); margin-top: 6px; display: block; }
.sp-prompt__arrow {
  position: absolute;
  top: 14px;
  right: 14px;
  color: var(--text-tertiary);
  opacity: 0;
  transform: translate(-3px, 3px);
  transition: opacity var(--dur-base), transform var(--dur-base) var(--ease-out);
}
.sp-prompt:hover .sp-prompt__arrow { opacity: 1; transform: none; }

/* ---------- ThinkingSteps ---------- */
.sp-steps { display: flex; flex-direction: column; align-items: flex-start; }
.sp-steps__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  font: var(--fw-medium) 13px/1.3 var(--font-sans);
  color: var(--text-tertiary);
  transition: color var(--dur-fast);
}
.sp-steps__toggle:hover { color: var(--text-secondary); }
.sp-steps__chev { transition: transform var(--dur-base) var(--ease-out); }
.sp-steps__chev.is-open { transform: rotate(90deg); }
.sp-steps__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 12px 0 2px 7px;
  padding-left: 16px;
  box-shadow: inset 1px 0 0 var(--border-default);
  animation: sp-fade-in var(--dur-base);
}
.sp-step { display: flex; align-items: center; gap: 9px; font: var(--fw-regular) 13px/1.3 var(--font-sans); color: var(--text-secondary); }
.sp-step.is-pending { color: var(--text-placeholder); }
.sp-step__detail { font: var(--fw-medium) 11px/1 var(--font-mono); color: var(--text-tertiary); letter-spacing: 0.02em; }
.sp-shimmer {
  background: linear-gradient(90deg, var(--text-tertiary) 0%, var(--text-tertiary) 35%, var(--text-primary) 50%, var(--text-tertiary) 65%, var(--text-tertiary) 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sp-shimmer 1.8s linear infinite;
}

/* ---------- Citation ---------- */
.sp-cite {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin: 0 2px;
  box-sizing: border-box;
  vertical-align: 2px;
  border: 0;
  border-radius: 5px;
  background: var(--surface-muted);
  color: var(--text-secondary);
  font: var(--fw-semibold) 10.5px/1 var(--font-mono);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.sp-cite:hover { background: var(--accent-soft); color: var(--text-accent); text-decoration: none; }
.sp-cite--pill {
  height: 28px;
  gap: 8px;
  padding: 0 11px 0 6px;
  margin: 0;
  vertical-align: middle;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  box-shadow: var(--hairline);
  font: var(--fw-medium) 12.5px/1 var(--font-sans);
  color: var(--text-secondary);
}
.sp-cite--pill:hover { background: var(--surface-hover); color: var(--text-primary); box-shadow: var(--hairline-strong); }
.sp-cite__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--surface-muted);
  font: var(--fw-semibold) 10px/1 var(--font-mono);
  color: var(--text-tertiary);
}

/* ---------- RiskMeter ---------- */
.sp-risk { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; }
.sp-risk__score { font-family: var(--font-mono); font-weight: var(--fw-semibold); letter-spacing: -0.02em; color: var(--text-primary); line-height: 1; }
.sp-risk__of { color: var(--text-tertiary); font-weight: var(--fw-medium); }
.sp-risk--bar { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; }
.sp-risk__track { position: relative; height: 7px; border-radius: 4px; background: var(--surface-muted); overflow: hidden; }
.sp-risk__fill { position: absolute; inset: 0 auto 0 0; border-radius: 4px; transition: width var(--dur-slow) var(--ease-out); }
.sp-risk__scale { display: flex; justify-content: space-between; font: var(--fw-medium) 9.5px/1 var(--font-mono); letter-spacing: 0.08em; color: var(--text-tertiary); }

/* ---------- VehicleSummary ---------- */
.sp-vsum { overflow: hidden; }
.sp-vsum__head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; box-shadow: inset 0 -1px 0 var(--border-subtle); }
.sp-vsum__tile {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-muted);
  color: var(--text-secondary);
  flex: none;
}
.sp-vsum__name { font: var(--fw-bold) 16px/1.2 var(--font-sans); letter-spacing: -0.01em; color: var(--text-primary); }
.sp-vsum__meta { font: var(--fw-medium) 10.5px/1 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-tertiary); margin-top: 5px; }
.sp-vsum__body { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; padding: 18px; }
.sp-vsum__stats {
  flex: 1 1 260px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border-subtle);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px var(--border-subtle);
}
.sp-vsum__stat { background: var(--surface-raised); padding: 10px 12px; }
.sp-vsum__stat-v { font: var(--fw-semibold) 18px/1 var(--font-mono); letter-spacing: -0.02em; color: var(--text-primary); }
.sp-vsum__stat-l { font: var(--fw-medium) 11.5px/1.2 var(--font-sans); color: var(--text-tertiary); margin-top: 5px; }
.sp-vsum__foot { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding: 12px 18px 14px; box-shadow: inset 0 1px 0 var(--border-subtle); background: var(--surface-sunken); }
.sp-vsum__extra { padding: 0 18px 6px; }

/* ---------- RecallItem ---------- */
.sp-recall { display: flex; gap: 12px; padding: 13px 0; box-shadow: inset 0 -1px 0 var(--border-subtle); }
.sp-recall:last-child { box-shadow: none; }
.sp-recall__sev { flex: none; width: 8px; height: 8px; margin-top: 6px; border-radius: 50%; }
.sp-recall__main { flex: 1; min-width: 0; }
.sp-recall__top { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sp-recall__title { font: var(--fw-semibold) 14px/1.35 var(--font-sans); color: var(--text-primary); }
.sp-recall__id { font: var(--fw-medium) 11px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--text-tertiary); }
.sp-recall__summary { font: var(--fw-regular) 13px/1.5 var(--font-sans); color: var(--text-secondary); margin-top: 4px; text-wrap: pretty; }
.sp-recall__date { font: var(--fw-medium) 11px/1 var(--font-mono); color: var(--text-tertiary); margin-top: 7px; letter-spacing: 0.02em; }

/* ---------- Workspace Shell Layout ---------- */
.sp-workspace {
  position: relative;
  display: flex;
  height: 100svh;
  width: 100%;
  overflow: hidden;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
}
.sp-sidebar {
  width: var(--sidebar-width);
  flex: none;
  height: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  background: var(--surface-sunken);
  box-shadow: inset -1px 0 0 var(--border-subtle);
  transition: margin-left var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  z-index: 40;
}
.sp-sidebar.is-collapsed {
  display: none;
}
.sp-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 39;
  background: var(--overlay);
  animation: sp-fade-in var(--dur-base);
}
.sp-sidebar__head {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 18px;
  flex: none;
}
.sp-sidebar__actions {
  padding: 4px 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: none;
}
.sp-sidebar__scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px 12px 12px;
}
.sp-side-label {
  font: 500 10px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 6px 10px 8px;
}
.sp-sidebar__foot {
  flex: none;
  padding: 10px 12px 12px;
  box-shadow: inset 0 1px 0 var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sp-nhtsa-sync {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px 4px;
  font: 500 10.5px var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}
.sp-nhtsa-sync__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--risk-low);
  flex: none;
}
.sp-user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 4px 0 6px;
}
.sp-user-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--surface-inverse);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 11.5px var(--font-sans);
  flex: none;
}

/* ---------- Main Column & Header ---------- */
.sp-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}
.sp-header {
  height: var(--header-height);
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-page);
  z-index: 30;
}
.sp-header__title {
  font: 600 14px/1.2 var(--font-sans);
  color: var(--text-primary);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sp-header__spacer {
  flex: 1;
}
.sp-model-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  box-shadow: var(--hairline);
}
.sp-model-pill select {
  border: 0;
  outline: 0;
  background: transparent;
  font: var(--fw-medium) 12.5px/1 var(--font-sans);
  color: var(--text-primary);
  cursor: pointer;
  padding-right: 4px;
}
.sp-model-status {
  font: var(--fw-medium) 10.5px/1 var(--font-mono);
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--text-accent);
  white-space: nowrap;
}

/* ---------- Platform Navigation Dropdown ---------- */
.sp-menu-wrap {
  position: relative;
}
.sp-menu-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 260px;
  background: var(--surface-raised);
  border-radius: var(--radius-lg);
  box-shadow: var(--hairline-strong), var(--shadow-lg);
  padding: 6px;
  z-index: 120;
  animation: sp-fade-up var(--dur-fast) var(--ease-out);
}
.sp-menu-dropdown a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text-secondary);
  font: var(--fw-medium) 13px/1.3 var(--font-sans);
  text-decoration: none;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.sp-menu-dropdown a:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  text-decoration: none;
}
.sp-menu-dropdown a.sp-menu-primary {
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
}
.sp-menu-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 5px 4px;
}

/* ---------- Home Empty State ---------- */
.sp-home {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}
.sp-home__inner {
  margin: auto;
  width: 100%;
  max-width: 720px;
  padding: 32px 24px 24px;
  box-sizing: border-box;
  animation: sp-fade-up var(--dur-slow) var(--ease-out);
}
.sp-home__mark-tile {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--surface-raised);
  box-shadow: var(--hairline), var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}
.sp-home__title {
  font: var(--type-h1);
  letter-spacing: var(--tracking-display);
  text-align: center;
  margin: 0;
  text-wrap: balance;
  color: var(--text-primary);
}
.sp-home__sub {
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.55;
  margin: 14px auto 28px;
  max-width: 540px;
  text-wrap: pretty;
}
.sp-prompts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.sp-disclaimer {
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  padding: 10px 24px 14px;
  line-height: 1.4;
}

/* ---------- Conversation View ---------- */
.sp-conversation {
  flex: 1;
  min-height: 0;
  position: relative;
  display: flex;
  flex-direction: column;
}
.sp-conversation__scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}
.sp-conversation__stream {
  max-width: var(--chat-column);
  margin: 0 auto;
  padding: 24px 24px 210px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sp-conversation__dock {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 32px 24px 0;
  background: linear-gradient(to bottom, transparent, var(--surface-page) 38%);
  pointer-events: none;
}
.sp-conversation__dock-inner {
  max-width: var(--chat-column);
  margin: 0 auto;
  pointer-events: auto;
}

/* ---------- Slide-Over ReportPanel Drawer ---------- */
.sp-report-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 420px;
  max-width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  box-shadow: var(--shadow-lg), inset 1px 0 0 var(--border-default);
  animation: sp-drawer-in var(--dur-slow) var(--ease-out);
  z-index: 45;
}
.sp-report-drawer__head {
  padding: 16px 16px 0 22px;
  flex: none;
}
.sp-report-drawer__body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 22px 22px;
  animation: sp-fade-in var(--dur-base);
}
.sp-report-drawer__foot {
  flex: none;
  padding: 12px 22px;
  box-shadow: inset 0 1px 0 var(--border-subtle);
  background: var(--surface-sunken);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* ---------- Full Printable Report Overlay ---------- */
.report-container {
  position: fixed;
  inset: 0;
  z-index: 130;
  background: var(--surface-page);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: sp-fade-in var(--dur-base);
}
.report-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border-default);
  background: var(--surface-raised);
  flex-shrink: 0;
}
.report-body {
  flex: 1;
  overflow-y: auto;
  padding: 32px 24px;
  background: var(--surface-sunken);
}
.report-content {
  max-width: 980px;
  margin: 0 auto;
}

/* ---------- Auth Notice & Trial Counter ---------- */
.sp-auth-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--text-secondary);
}
.sp-auth-notice a {
  font-weight: var(--fw-semibold);
  color: var(--text-accent);
  cursor: pointer;
}
.sp-auth-message {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 14px;
  background: var(--accent-soft);
  color: var(--text-accent);
  box-shadow: inset 0 0 0 1px var(--accent-line);
}
.sp-auth-message.error {
  background: var(--risk-high-soft);
  color: var(--risk-high);
  box-shadow: inset 0 0 0 1px var(--risk-high);
}

/* ---------- Responsive Rules ---------- */
@media (max-width: 900px) {
  .sp-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    box-shadow: var(--shadow-lg);
  }
  .sp-home__title {
    font-size: 26px;
  }
  .sp-prompts-grid {
    grid-template-columns: 1fr;
  }
  .sp-conversation__stream {
    padding: 16px 16px 200px;
  }
  .sp-conversation__dock {
    padding: 24px 12px 0;
  }
}
@media (max-width: 640px) {
  .sp-header {
    gap: 4px;
    padding: 0 8px;
  }
  .sp-model-status,
  .sp-header__spacer,
  #menuButton > span {
    display: none;
  }
  .sp-header__title {
    flex: 1 1 auto;
    min-width: 0;
  }
  .sp-model-pill {
    max-width: 112px;
    padding: 0 8px;
    gap: 4px;
  }
  .sp-model-pill select {
    max-width: 78px;
  }
}
@media print {
  .report-header { display: none; }
  .report-container { position: static; overflow: visible; }
  .report-body { overflow: visible; padding: 0; background: #fff; }
}