/* =========================================================================
   Testsoria Design Extracts — shared stylesheet
   Mirrors online-web/src/app/styles/tokens.css (source of truth for tokens).
   Plain CSS, no preprocessors. Loaded via <link rel="stylesheet"> from every
   *.html in this directory. Open any extract via file:// — no server needed.
   ========================================================================= */

/* ---------------------- 1. TOKENS (light, default) ---------------------- */
:root {
  /* color — brand & accents */
  --color-primary: #1f5547;
  --color-primary-strong: #143a30;
  --color-primary-soft: #e3efeb;
  --color-accent: #b8862f;
  --color-accent-soft: #f6ecd6;

  /* color — status */
  --color-success: #1f7a46;
  --color-success-bg: #e8f5ed;
  --color-danger: #a2352f;
  --color-danger-bg: #fbeae8;
  --color-warning: #a36418;
  --color-warning-bg: #fbf0d8;
  --color-info: #1c5a8f;
  --color-info-bg: #e7f1fb;

  /* color — surfaces & text */
  --color-bg: #faf7f1;
  --color-surface-1: #ffffff;
  --color-surface-2: #f3ede2;
  --color-surface-3: #ebe3d3;
  --color-surface-overlay: rgba(20, 18, 14, 0.45);
  --color-border: #e3dac6;
  --color-border-strong: #c9bda1;
  --color-text: #1c1a16;
  --color-text-muted: #615847;
  --color-text-subtle: #8a8270;
  --color-text-on-primary: #ffffff;

  /* role colors (for avatar rings & badges) */
  --color-role-guest: #8a8270;
  --color-role-user: #5a8a78;
  --color-role-user-plus: #b8862f;
  --color-role-moderator: #1c5a8f;
  --color-role-admin: #a2352f;

  /* typography */
  --font-sans: "Inter", "Inter Variable", system-ui, -apple-system, "Segoe UI",
    "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --font-size-xs: 0.75rem;       /* 12 */
  --font-size-sm: 0.8125rem;     /* 13 */
  --font-size-base: 0.9375rem;   /* 15 */
  --font-size-md: 1rem;          /* 16 */
  --font-size-lg: 1.125rem;      /* 18 */
  --font-size-xl: 1.375rem;      /* 22 */
  --font-size-2xl: 1.75rem;      /* 28 */
  --font-size-3xl: 2.25rem;      /* 36 */

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.65;

  /* spacing (4 px base) */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* shadows */
  --shadow-sm: 0 1px 2px rgba(20, 16, 8, 0.06), 0 1px 1px rgba(20, 16, 8, 0.04);
  --shadow-md: 0 4px 12px rgba(20, 16, 8, 0.08), 0 2px 4px rgba(20, 16, 8, 0.04);
  --shadow-lg: 0 12px 32px rgba(20, 16, 8, 0.14), 0 4px 8px rgba(20, 16, 8, 0.06);
  --shadow-focus-ring: 0 0 0 3px color-mix(in srgb, var(--color-primary) 35%, transparent);

  /* z-index */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-chatdock: 300;
  --z-modal: 400;
  --z-toast: 500;
  --z-tooltip: 600;

  /* motion */
  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 320ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* layout */
  --sidebar-width: 260px;
  --sidebar-width-collapsed: 64px;
  --topbar-height: 56px;
  --content-max-width: 1280px;
}

/* ---------------------- 2. TOKENS (dark) ------------------------------- */
html[data-theme="dark"] {
  --color-primary: #5fa898;
  --color-primary-strong: #9fd1c4;
  --color-primary-soft: #1d2e2a;
  --color-accent: #d6a655;
  --color-accent-soft: #2e2517;

  --color-success: #7cc594;
  --color-success-bg: #1a2e22;
  --color-danger: #e08a82;
  --color-danger-bg: #3a1f1c;
  --color-warning: #e6b25c;
  --color-warning-bg: #2e2515;
  --color-info: #7ab3df;
  --color-info-bg: #182634;

  --color-bg: #13161a;
  --color-surface-1: #1a1e23;
  --color-surface-2: #22272d;
  --color-surface-3: #2a3037;
  --color-surface-overlay: rgba(0, 0, 0, 0.6);
  --color-border: #2e353d;
  --color-border-strong: #48515b;
  --color-text: #e8eaee;
  --color-text-muted: #a8aeb7;
  --color-text-subtle: #777e88;
  --color-text-on-primary: #0b1614;

  --color-role-guest: #777e88;
  --color-role-user: #5fa898;
  --color-role-user-plus: #d6a655;
  --color-role-moderator: #7ab3df;
  --color-role-admin: #e08a82;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6), 0 4px 8px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --color-primary: #5fa898;
    --color-primary-strong: #9fd1c4;
    --color-primary-soft: #1d2e2a;
    --color-accent: #d6a655;
    --color-accent-soft: #2e2517;
    --color-success: #7cc594;
    --color-success-bg: #1a2e22;
    --color-danger: #e08a82;
    --color-danger-bg: #3a1f1c;
    --color-warning: #e6b25c;
    --color-warning-bg: #2e2515;
    --color-info: #7ab3df;
    --color-info-bg: #182634;
    --color-bg: #13161a;
    --color-surface-1: #1a1e23;
    --color-surface-2: #22272d;
    --color-surface-3: #2a3037;
    --color-surface-overlay: rgba(0, 0, 0, 0.6);
    --color-border: #2e353d;
    --color-border-strong: #48515b;
    --color-text: #e8eaee;
    --color-text-muted: #a8aeb7;
    --color-text-subtle: #777e88;
    --color-text-on-primary: #0b1614;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6), 0 4px 8px rgba(0, 0, 0, 0.4);
  }
}

/* ---------------------- 3. RESET & BASE -------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}
h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-sm); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted); }

p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
a { color: var(--color-primary-strong); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-ring);
  border-radius: var(--radius-sm);
}

button { font: inherit; color: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }

::selection { background: color-mix(in srgb, var(--color-primary) 35%, transparent); color: var(--color-text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0ms !important;
    transition-duration: 0ms !important;
  }
}

/* ---------------------- 4. APP SHELL ----------------------------------- */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--topbar-height) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar main";
  min-height: 100vh;
  background: var(--color-bg);
}
.app-shell.is-collapsed { grid-template-columns: var(--sidebar-width-collapsed) 1fr; }
.app-shell.is-noshell { display: block; }

.sidebar {
  grid-area: sidebar;
  background: var(--color-surface-2);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-3);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
}
.sidebar__brand-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-strong) 100%);
  display: grid;
  place-items: center;
  color: var(--color-text-on-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-sm);
}
.sidebar__brand-name {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-md);
  letter-spacing: -0.01em;
}
.sidebar__brand-tag {
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
}
.sidebar__group { display: flex; flex-direction: column; gap: var(--space-1); }
.sidebar__group-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-2) var(--space-3) var(--space-1);
}
.menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: left;
  width: 100%;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}
.menu-item:hover { background: var(--color-surface-3); }
.menu-item.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  font-weight: var(--font-weight-semibold);
}
.menu-item__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  color: var(--color-text-muted);
}
.menu-item.is-active .menu-item__icon { color: var(--color-primary-strong); }
.menu-item__label { flex: 1; }
.menu-item__badge {
  background: var(--color-accent);
  color: var(--color-text-on-primary);
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
  padding: 1px var(--space-2);
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}

.topbar {
  grid-area: topbar;
  background: var(--color-surface-1);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}
.topbar__search {
  flex: 1;
  max-width: 420px;
  position: relative;
}
.topbar__search input {
  width: 100%;
  height: 36px;
  padding: 0 var(--space-3) 0 var(--space-8);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}
.topbar__search input::placeholder { color: var(--color-text-subtle); }
.topbar__search::before {
  content: "⌕";
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-subtle);
  font-size: var(--font-size-md);
}
.topbar__right { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }

.workspace-tabs {
  grid-area: main;
  align-self: start;
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: var(--topbar-height);
  z-index: calc(var(--z-sticky) - 1);
  overflow-x: auto;
}
.workspace-tabs__tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-bottom: none;
  cursor: pointer;
  white-space: nowrap;
}
.workspace-tabs__tab.is-active {
  background: var(--color-surface-1);
  color: var(--color-text);
  font-weight: var(--font-weight-semibold);
  position: relative;
}
.workspace-tabs__tab.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--color-primary);
}
.workspace-tabs__close {
  border: none;
  background: transparent;
  color: var(--color-text-subtle);
  padding: 0 2px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}
.workspace-tabs__close:hover { background: var(--color-surface-3); color: var(--color-text); }

.main {
  grid-area: main;
  padding: var(--space-6) var(--space-8) var(--space-12);
  min-width: 0;
  overflow-x: hidden;
}
.main.has-tabs { padding-top: var(--space-12); }

.view-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.view-header__title { font-size: var(--font-size-2xl); letter-spacing: -0.02em; }
.view-header__sub {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}
.view-header__actions { display: flex; align-items: center; gap: var(--space-2); }

.view-grid { display: grid; gap: var(--space-5); }
.view-grid--2 { grid-template-columns: 1fr 1fr; }
.view-grid--3 { grid-template-columns: repeat(3, 1fr); }
.view-grid--4 { grid-template-columns: repeat(4, 1fr); }
.view-grid--split { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
@media (max-width: 960px) {
  .view-grid--2, .view-grid--3, .view-grid--4, .view-grid--split { grid-template-columns: 1fr; }
}

/* ---------------------- 5. BUTTONS ------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  height: 36px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: var(--color-surface-2);
  color: var(--color-text);
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  text-decoration: none;
}
.btn:hover { background: var(--color-surface-3); }
.btn:focus-visible { box-shadow: var(--shadow-focus-ring); }
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover { background: var(--color-primary-strong); border-color: var(--color-primary-strong); }
.btn--secondary {
  background: var(--color-surface-1);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn--secondary:hover { background: var(--color-surface-2); }
.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
}
.btn--ghost:hover { background: var(--color-surface-2); color: var(--color-text); }
.btn--danger {
  background: var(--color-danger);
  color: #fff;
  border-color: var(--color-danger);
}
.btn--danger:hover { filter: brightness(0.9); }
.btn--sm { height: 28px; padding: 0 var(--space-3); font-size: var(--font-size-xs); }
.btn--lg { height: 44px; padding: 0 var(--space-5); font-size: var(--font-size-md); }
.btn[disabled], .btn.is-disabled { opacity: 0.5; cursor: not-allowed; }
.btn__icon { width: 16px; height: 16px; display: inline-grid; place-items: center; }

/* ---------------------- 6. BADGES & TAGS ------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  line-height: 1.4;
  border: 1px solid var(--color-border);
}
.badge--primary { background: var(--color-primary-soft); color: var(--color-primary-strong); border-color: transparent; }
.badge--accent  { background: var(--color-accent-soft); color: var(--color-accent); border-color: transparent; }
.badge--success { background: var(--color-success-bg); color: var(--color-success); border-color: transparent; }
.badge--danger  { background: var(--color-danger-bg); color: var(--color-danger); border-color: transparent; }
.badge--warning { background: var(--color-warning-bg); color: var(--color-warning); border-color: transparent; }
.badge--info    { background: var(--color-info-bg); color: var(--color-info); border-color: transparent; }
.badge--solid-primary { background: var(--color-primary); color: var(--color-text-on-primary); border-color: transparent; }

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
}
.tag-pill:hover { background: var(--color-surface-3); color: var(--color-text); }
.tag-pill.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
}
.tag-pill__remove {
  display: inline-grid;
  place-items: center;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-text) 12%, transparent);
  color: var(--color-text);
  font-size: 9px;
  line-height: 1;
  border: none;
  padding: 0;
}

/* ---------------------- 7. AVATAR & KBD -------------------------------- */
.avatar {
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  user-select: none;
  letter-spacing: -0.02em;
  position: relative;
}
.avatar--xs { width: 22px; height: 22px; font-size: 10px; }
.avatar--sm { width: 28px; height: 28px; font-size: var(--font-size-xs); }
.avatar--md { width: 36px; height: 36px; font-size: var(--font-size-sm); }
.avatar--lg { width: 56px; height: 56px; font-size: var(--font-size-md); }
.avatar--xl { width: 88px; height: 88px; font-size: var(--font-size-2xl); }
.avatar.role-guest      { box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-role-guest); }
.avatar.role-user       { box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-role-user); }
.avatar.role-user-plus  { box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-role-user-plus); }
.avatar.role-moderator  { box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-role-moderator); }
.avatar.role-admin      { box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-role-admin); }
.avatar__status {
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-success);
  border: 2px solid var(--color-surface-1);
}

.kbd {
  display: inline-grid;
  place-items: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-strong);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  line-height: 1;
}
.kbd-cluster { display: inline-flex; align-items: center; gap: 4px; }
.kbd-cluster__sep { color: var(--color-text-subtle); font-size: var(--font-size-xs); }

/* ---------------------- 8. CARDS --------------------------------------- */
.card {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.card--padded { padding: var(--space-5); }
.card--tinted { background: var(--color-surface-2); }
.card--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-strong) 100%);
  color: var(--color-text-on-primary);
  border-color: transparent;
}
.card--primary .card__title, .card--primary .card__sub, .card--primary p { color: var(--color-text-on-primary); }
.card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.card--tinted .card__header { border-bottom-color: var(--color-border-strong); }
.card__eyebrow {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-1);
}
.card__title { font-size: var(--font-size-lg); letter-spacing: -0.01em; }
.card__sub { font-size: var(--font-size-sm); color: var(--color-text-muted); margin-top: var(--space-1); }
.card__body { padding: var(--space-5); }
.card__footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.card__actions { display: flex; gap: var(--space-2); }

/* ---------------------- 9. INPUTS -------------------------------------- */
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}
.field__hint { font-size: var(--font-size-xs); color: var(--color-text-subtle); }
.field__error { font-size: var(--font-size-xs); color: var(--color-danger); }

.input, .textarea, .select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: border-color var(--duration-fast) var(--ease-out);
}
.input::placeholder, .textarea::placeholder { color: var(--color-text-subtle); }
.input:focus, .textarea:focus, .select:focus { border-color: var(--color-primary); outline: none; box-shadow: var(--shadow-focus-ring); }
.input { height: 36px; }
.textarea { min-height: 96px; resize: vertical; font-family: inherit; line-height: var(--line-height-base); }
.select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
                    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 12px) 50%;
  background-size: 4px 4px, 4px 4px;
  background-repeat: no-repeat;
  padding-right: var(--space-8);
  cursor: pointer;
}

.checkbox, .radio {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-1);
  margin: 0;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
}
.checkbox { border-radius: var(--radius-sm); }
.radio { border-radius: var(--radius-full); }
.checkbox:checked, .radio:checked { background: var(--color-primary); border-color: var(--color-primary); }
.checkbox:checked::after {
  content: "";
  width: 5px;
  height: 8px;
  border: 2px solid var(--color-text-on-primary);
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}
.radio:checked::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-text-on-primary);
}

.toggle {
  --toggle-w: 36px;
  --toggle-h: 20px;
  appearance: none;
  width: var(--toggle-w);
  height: var(--toggle-h);
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-strong);
  position: relative;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}
.toggle::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 1px;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-surface-1);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out);
}
.toggle:checked { background: var(--color-primary); border-color: var(--color-primary); }
.toggle:checked::after { transform: translateX(16px); }

/* ---------------------- 10. STAT CARDS, LISTS, TABS ------------------- */
.stat-card {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-sm);
}
.stat-card__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.stat-card__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.stat-card__meta { font-size: var(--font-size-xs); color: var(--color-text-muted); display: inline-flex; align-items: center; gap: var(--space-1); }
.stat-card__delta--up { color: var(--color-success); }
.stat-card__delta--down { color: var(--color-danger); }

.stack-list { display: flex; flex-direction: column; }
.stack-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}
.stack-list__item:last-child { border-bottom: none; }
.stack-list__item:hover { background: var(--color-surface-2); }
.stack-list__item.is-active { background: var(--color-primary-soft); }
.stack-list__main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.stack-list__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.stack-list__sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
}
.stack-list__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  flex-shrink: 0;
}

.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}
.tabs__tab {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  position: relative;
}
.tabs__tab:hover { color: var(--color-text); }
.tabs__tab.is-active { color: var(--color-text); font-weight: var(--font-weight-semibold); }
.tabs__tab.is-active::after {
  content: "";
  position: absolute;
  left: var(--space-3); right: var(--space-3); bottom: -1px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.tabs--pill { border: none; gap: var(--space-1); padding: var(--space-1); background: var(--color-surface-2); border-radius: var(--radius-md); display: inline-flex; }
.tabs--pill .tabs__tab { border-radius: var(--radius-sm); padding: var(--space-1) var(--space-3); }
.tabs--pill .tabs__tab.is-active { background: var(--color-surface-1); box-shadow: var(--shadow-sm); }
.tabs--pill .tabs__tab.is-active::after { display: none; }

/* ---------------------- 11. PAGINATION, SPOILER, BREADCRUMB ------------ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  margin-top: var(--space-5);
}
.pagination__btn {
  min-width: 32px;
  height: 32px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-1);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
}
.pagination__btn:hover { background: var(--color-surface-2); }
.pagination__btn.is-active { background: var(--color-primary); color: var(--color-text-on-primary); border-color: var(--color-primary); }
.pagination__ellipsis { color: var(--color-text-subtle); padding: 0 var(--space-1); }

.spoiler {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-1);
}
.spoiler__summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}
.spoiler__summary::-webkit-details-marker { display: none; }
.spoiler__caret {
  width: 14px;
  height: 14px;
  display: inline-grid;
  place-items: center;
  transition: transform var(--duration-fast) var(--ease-out);
  color: var(--color-text-muted);
}
.spoiler[open] .spoiler__caret { transform: rotate(90deg); }
.spoiler__content { padding: 0 var(--space-4) var(--space-4); color: var(--color-text-muted); font-size: var(--font-size-sm); }

.breadcrumb { display: flex; align-items: center; gap: var(--space-2); font-size: var(--font-size-sm); color: var(--color-text-muted); }
.breadcrumb__sep { color: var(--color-text-subtle); }
.breadcrumb__current { color: var(--color-text); font-weight: var(--font-weight-medium); }

/* ---------------------- 12. MODAL & CHAT DOCK -------------------------- */
.modal-scrim {
  position: fixed;
  inset: 0;
  background: var(--color-surface-overlay);
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: var(--space-4);
  backdrop-filter: blur(2px);
}
.modal {
  background: var(--color-surface-1);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal--md { max-width: 640px; }
.modal--lg { max-width: 880px; }
.modal--full { max-width: 1100px; max-height: 90vh; }
.modal__header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.modal__title { font-size: var(--font-size-lg); }
.modal__close {
  background: transparent;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
}
.modal__close:hover { background: var(--color-surface-2); color: var(--color-text); }
.modal__body { padding: var(--space-5); overflow: auto; }
.modal__footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  background: var(--color-surface-2);
}

.chat-dock {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  width: 360px;
  max-height: 520px;
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-chatdock);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-dock--collapsed {
  width: auto;
  max-height: none;
  height: 48px;
  padding: 0 var(--space-4);
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
}
.chat-dock__header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background: var(--color-surface-2);
}
.chat-dock__title { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); }
.chat-dock__body { flex: 1; overflow: auto; padding: var(--space-3); display: flex; flex-direction: column; gap: var(--space-3); }
.chat-dock__msg {
  background: var(--color-surface-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
  max-width: 85%;
}
.chat-dock__msg--me { background: var(--color-primary-soft); align-self: flex-end; }
.chat-dock__msg__author { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-bottom: 2px; }
.chat-dock__footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2);
  display: flex;
  gap: var(--space-2);
}
.chat-dock__footer .input { height: 32px; font-size: var(--font-size-sm); }

.chat-dock-fab {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border: none;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-chatdock);
  cursor: pointer;
}
.chat-dock-fab__count {
  position: absolute;
  top: -2px;
  right: -2px;
  background: var(--color-accent);
  color: var(--color-text-on-primary);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  padding: 2px 6px;
  min-width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border: 2px solid var(--color-surface-1);
}

/* ---------------------- 13. TOAST -------------------------------------- */
.toast {
  background: var(--color-surface-1);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 280px;
}
.toast--success { border-left-color: var(--color-success); }
.toast--danger { border-left-color: var(--color-danger); }
.toast--warning { border-left-color: var(--color-warning); }
.toast__title { font-weight: var(--font-weight-semibold); font-size: var(--font-size-sm); }
.toast__msg { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }

/* ---------------------- 14. SESSION & QUESTION ANSWERS ----------------- */
.q-stem {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}
.q-stem em { font-style: italic; }
.q-stem strong { font-weight: var(--font-weight-semibold); }

.q-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.q-meta__dot { width: 4px; height: 4px; border-radius: var(--radius-full); background: var(--color-border-strong); }

.answer-list { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-4); }
.answer {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}
.answer:hover { background: var(--color-surface-2); }
.answer__letter {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-strong);
  display: grid;
  place-items: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.answer__text { font-size: var(--font-size-sm); line-height: var(--line-height-base); color: var(--color-text); }
.answer.is-selected {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}
.answer.is-selected .answer__letter {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-on-primary);
}
.answer.is-correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}
.answer.is-correct .answer__letter {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}
.answer.is-wrong {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
}
.answer.is-wrong .answer__letter {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
}

.progress {
  height: 6px;
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  overflow: hidden;
  width: 100%;
}
.progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: inherit;
  transition: width var(--duration-base) var(--ease-out);
}
.progress--accent .progress__bar { background: var(--color-accent); }

/* ---------------------- 15. UTILITIES ---------------------------------- */
.muted { color: var(--color-text-muted); }
.subtle { color: var(--color-text-subtle); }
.eyebrow {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hstack { display: flex; align-items: center; gap: var(--space-3); }
.vstack { display: flex; flex-direction: column; gap: var(--space-3); }
.spacer { flex: 1; }
.divider { height: 1px; background: var(--color-border); margin: var(--space-4) 0; }
.is-hidden { display: none !important; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-3);
  height: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  cursor: pointer;
}
.theme-toggle:hover { background: var(--color-surface-2); }

.role-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 1px var(--space-2);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}
.role-badge--guest      { background: color-mix(in srgb, var(--color-role-guest) 15%, transparent); color: var(--color-role-guest); }
.role-badge--user       { background: color-mix(in srgb, var(--color-role-user) 15%, transparent); color: var(--color-role-user); }
.role-badge--user-plus  { background: color-mix(in srgb, var(--color-role-user-plus) 18%, transparent); color: var(--color-role-user-plus); }
.role-badge--moderator  { background: color-mix(in srgb, var(--color-role-moderator) 15%, transparent); color: var(--color-role-moderator); }
.role-badge--admin      { background: color-mix(in srgb, var(--color-role-admin) 15%, transparent); color: var(--color-role-admin); }

/* Demo helper: large hero blocks for marketing-style pages */
.hero {
  padding: var(--space-12) var(--space-8);
  background: linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-bg) 70%);
  border-radius: var(--radius-xl);
  display: grid;
  gap: var(--space-4);
}
.hero h1 { letter-spacing: -0.03em; max-width: 32ch; }
.hero p { font-size: var(--font-size-lg); color: var(--color-text-muted); max-width: 56ch; }

/* Small icon helper using inline SVG strokes — sized in em */
.icon { width: 1em; height: 1em; flex-shrink: 0; vertical-align: -2px; }