/* AI Friend 24 — v3 design system
   Editorial warmth: cream paper, serif headlines, family-colored topic cards.
   Mobile-first, ~24KB unminified. Self-contained — no Bootstrap dependency. */

/* ---------- Tokens ---------- */
:root {
  /* Ink */
  --ink: #1a1a26;
  --ink-2: #2d2d3d;
  --ink-3: #4a4a5e;
  --ink-4: #7a7a8e;
  --hair: #d8d0bf;

  /* Paper */
  --paper: #faf6ef;
  --paper-2: #f3ecdd;
  --paper-3: #e8dfcc;
  --paper-4: #d9cdb3;

  /* Accents */
  --gold: #c89b3a;
  --gold-2: #a87f24;
  --gold-soft: #f1e2b5;
  --danger: #b04138;
  --success: #2d6a36;
  --info: #1f6b6a;

  /* Topic family triplets — deep / mid / soft */
  --study-deep: #2c5e3f;     --study-mid: #6a9f7a;     --study-soft: #c8d9c4;
  --paprika-deep: #c2562a;   --paprika-mid: #e89160;   --paprika-soft: #f4c9b0;
  --aubergine-deep: #5b3070; --aubergine-mid: #8a5fa8; --aubergine-soft: #d8c3e6;
  --wine-deep: #7a2a3a;      --wine-mid: #b15a6a;      --wine-soft: #e6c4cc;
  --lagoon-deep: #1f6b6a;    --lagoon-mid: #4a9695;    --lagoon-soft: #b8dcdb;
  --tangerine-deep: #b34b06; --tangerine-mid: #d97a2e; --tangerine-soft: #f4cda6;
  --slate-deep: #1f3a5f;     --slate-mid: #4b7aab;     --slate-soft: #c3d3e5;
  --spring-deep: #2d6a36;    --spring-mid: #5fa066;    --spring-soft: #c9e0ca;
  --indigo-deep: #283561;    --indigo-mid: #5a6fb2;    --indigo-soft: #c4cae4;
  --coral-deep: #b34960;     --coral-mid: #db7d92;     --coral-soft: #f0c4ce;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", "Hoefler Text", Georgia, serif;
  --font-body: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Rhythm */
  --r-1: 4px;  --r-2: 8px;  --r-3: 12px; --r-4: 16px;
  --r-5: 24px; --r-6: 32px; --r-7: 48px; --r-8: 72px;

  --radius-sm: 6px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --shadow-paper: 0 1px 0 rgba(26,26,38,.04), 0 12px 32px -16px rgba(26,26,38,.18);
  --shadow-card:  0 1px 0 rgba(26,26,38,.05), 0 22px 44px -24px rgba(26,26,38,.28);
  --shadow-press: 0 1px 0 rgba(26,26,38,.06), 0 6px 16px -8px rgba(26,26,38,.22);

  --grain: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .1  0 0 0 0 .09  0 0 0 0 .15  0 0 0 .06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body.aif {
  padding-top: 64px;
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  background-image: var(--grain);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main, .aif-main { flex: 1 0 auto; }

img, svg { max-width: 100%; vertical-align: middle; }

a { color: var(--ink-2); text-decoration: underline; text-decoration-color: var(--paper-4); text-underline-offset: 3px; transition: text-decoration-color .15s; }
a:hover { text-decoration-color: var(--gold); }

/* ---------- Type scale ---------- */
.aif h1, .aif-h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 144, "SOFT" 60;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--r-4);
  color: var(--ink);
}
.aif h2, .aif-h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 96, "SOFT" 40;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 var(--r-3);
  color: var(--ink);
}
.aif h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 48, "SOFT" 20;
  font-size: 1.3rem;
  line-height: 1.2;
  margin: 0 0 var(--r-2);
}
.aif p { margin: 0 0 var(--r-3); }
.aif small, .aif-meta { font-size: .82rem; color: var(--ink-4); letter-spacing: .01em; }
.aif-eyebrow {
  font-family: var(--font-body);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* ---------- Layout ---------- */
.aif-shell {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: var(--r-5) var(--r-4);
}
@media (min-width: 768px) { .aif-shell { padding: var(--r-7) var(--r-5); } }

.aif-grid { display: grid; gap: var(--r-4); }
.aif-grid.cols-2 { grid-template-columns: 1fr; }
.aif-grid.cols-3 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .aif-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .aif-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .aif-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Header / nav ---------- */
.aif-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  background: rgba(250,246,239,.86);
  backdrop-filter: saturate(120%) blur(14px);
  -webkit-backdrop-filter: saturate(120%) blur(14px);
  border-bottom: 1px solid var(--paper-3);
}
.aif-nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 12px var(--r-4);
  display: flex;
  align-items: center;
  gap: var(--r-3);
  min-height: 64px;
}
.aif-brand {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  text-decoration: none;
}
.aif-brand img {
  height: 34px;
  width: auto;
  display: block;
}
.aif-brand:hover { text-decoration: none; opacity: .85; }
@media (max-width: 480px) {
  .aif-brand img { height: 28px; }
}

.aif-nav-spacer { flex: 1; }
.aif-nav-actions { display: flex; align-items: center; gap: var(--r-2); }

/* Crumb (desktop only) */
.aif-crumb {
  display: none;
  font-size: .85rem;
  color: var(--ink-4);
}
.aif-crumb a { color: var(--ink-3); }
.aif-crumb .sep { margin: 0 8px; color: var(--paper-4); }
@media (min-width: 768px) { .aif-crumb { display: inline-flex; align-items: center; } }

/* User chip + dropdown */
.aif-userchip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--paper-3);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-2);
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  text-decoration: none;
  transition: border-color .15s, background .15s;
}
.aif-userchip:hover { border-color: var(--ink-4); text-decoration: none; }
.aif-userchip .av {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--gold-soft);
  color: var(--gold-2);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .88rem;
}
.aif-userchip .caret { width: 12px; height: 12px; opacity: .6; }

.aif-menu {
  position: absolute;
  top: 56px;
  right: var(--r-4);
  min-width: 220px;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 6px;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity .15s, transform .15s;
  z-index: 70;
}
.aif-menu.open { opacity: 1; transform: none; pointer-events: auto; }
.aif-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--ink-2);
  font-size: .94rem;
  font-weight: 500;
  text-decoration: none;
}
.aif-menu a:hover { background: var(--paper-2); }
.aif-menu .ic { width: 16px; height: 16px; opacity: .7; }
.aif-menu hr { border: 0; border-top: 1px solid var(--paper-3); margin: 6px 4px; }

/* Quota ring — circular SVG progress sitting in nav */
.aif-quota {
  position: relative;
  width: 38px; height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.aif-quota svg { transform: rotate(-90deg); width: 100%; height: 100%; }
.aif-quota .track { stroke: var(--paper-3); }
.aif-quota .bar { stroke: var(--study-mid); transition: stroke-dashoffset .4s ease, stroke .3s; }
.aif-quota.warn .bar { stroke: var(--gold); }
.aif-quota.full .bar { stroke: var(--danger); animation: pulse-gold 1.6s ease-in-out infinite; }
.aif-quota .qn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .85rem;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--ink-2);
}
@keyframes pulse-gold {
  50% { opacity: .55; }
}

/* ---------- Hero (dashboard, plans, login) ---------- */
.aif-hero {
  padding: var(--r-6) 0 var(--r-5);
}
.aif-hero .aif-eyebrow { margin-bottom: var(--r-2); }
.aif-hero p { color: var(--ink-3); max-width: 56ch; font-size: 1.05rem; }
.aif-hero .lede { font-size: 1.1rem; }

/* ---------- Buttons ---------- */
.aif-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .005em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .15s, background .15s, color .15s, border-color .15s;
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
}
.aif-btn:hover { background: var(--ink-2); text-decoration: none; box-shadow: var(--shadow-press); }
.aif-btn:active { transform: scale(.985); box-shadow: none; }
.aif-btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.aif-btn[disabled], .aif-btn.is-disabled { opacity: .55; pointer-events: none; }

.aif-btn--gold { background: var(--gold); color: var(--ink); }
.aif-btn--gold:hover { background: var(--gold-2); color: var(--paper); }

.aif-btn--ghost { background: transparent; color: var(--ink-2); border-color: var(--paper-4); }
.aif-btn--ghost:hover { background: var(--paper-2); color: var(--ink); }

.aif-btn--light { background: var(--paper); color: var(--ink); border-color: var(--paper-3); }
.aif-btn--light:hover { background: var(--paper-2); }

.aif-btn--danger { background: var(--danger); color: var(--paper); border-color: var(--danger); }
.aif-btn--danger:hover { background: #8e2e26; color: var(--paper); border-color: #8e2e26; }

.aif-btn--sm { padding: 8px 14px; font-size: .85rem; min-height: 36px; }
.aif-btn--icon { padding: 10px; min-height: 40px; min-width: 40px; }
/* Compact icon-only button used in admin tables (delete row, etc.). */
.aif-btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0; border-radius: 6px;
  background: transparent; color: var(--ink-3);
  border: 1px solid var(--paper-3); cursor: pointer; transition: all .12s ease;
}
.aif-btn-icon:hover { background: var(--paper-2); color: var(--ink); }
.aif-btn-icon:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.aif-btn-icon .ic { width: 16px; height: 16px; }
.aif-btn-icon--danger:hover { background: var(--danger); color: var(--paper); border-color: var(--danger); }
.aif-btn .ic { width: 16px; height: 16px; }

/* ---------- Forms ---------- */
.aif-field { margin: 0 0 var(--r-4); display: flex; flex-direction: column; gap: 6px; }
.aif-field label {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.aif-input, .aif-select, .aif-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color .15s, box-shadow .15s, background .15s;
  -webkit-appearance: none; appearance: none;
  min-height: 48px;
}
.aif-textarea { min-height: 96px; resize: vertical; line-height: 1.55; }
.aif-input:hover, .aif-select:hover, .aif-textarea:hover { border-color: var(--paper-4); }
.aif-input:focus, .aif-select:focus, .aif-textarea:focus {
  outline: none;
  border-color: var(--ink-3);
  box-shadow: 0 0 0 3px rgba(200,155,58,.18);
  background: var(--paper);
}
.aif-input:read-only, .aif-textarea:read-only { background: var(--paper-2); color: var(--ink-3); }

.aif-select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' fill='none' stroke='%234a4a5e' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 12px 8px;
  padding-right: 38px;
}

.aif-hint {
  font-size: .82rem;
  color: var(--ink-4);
  margin-top: 4px;
}

.aif-field-row { display: grid; gap: var(--r-3); }
@media (min-width: 640px) { .aif-field-row.two { grid-template-columns: 1fr 1fr; } }

/* Inline alert */
.aif-alert {
  border: 1px solid var(--paper-3);
  background: var(--paper-2);
  border-left: 4px solid var(--ink-4);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: .92rem;
  color: var(--ink-2);
  margin: 0 0 var(--r-4);
}
.aif-alert--danger { border-left-color: var(--danger); background: #f7e0dd; color: #6b231d; }
.aif-alert--info { border-left-color: var(--info); background: #d9ecec; color: #1a3939; }
.aif-alert--gold { border-left-color: var(--gold); background: var(--gold-soft); color: #5a4310; }

/* ---------- Dashboard topic grid ---------- */
.aif-topics { margin-top: var(--r-5); }

.aif-topic-card {
  position: relative;
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-lg);
  padding: var(--r-4);
  min-height: 168px;
  overflow: hidden;
  transition: transform .18s ease, box-shadow .2s, border-color .2s;
  isolation: isolate;
  opacity: 0;
  animation: card-in .5s cubic-bezier(.2,.7,.3,1) forwards;
  animation-delay: calc(var(--i, 0) * 55ms);
}
.aif-topic-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 0% 0%, var(--tc-soft, var(--paper-3)) 0%, transparent 55%),
    repeating-linear-gradient(135deg, transparent 0 9px, rgba(26,26,38,.03) 9px 10px);
  z-index: -1;
  opacity: .9;
  transition: opacity .25s;
}
.aif-topic-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 4px;
  background: var(--tc-deep, var(--ink-4));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.aif-topic-card:hover {
  transform: translateY(-2px);
  border-color: var(--tc-mid, var(--ink-4));
  box-shadow: var(--shadow-paper);
  text-decoration: none;
}
.aif-topic-card:hover::after { transform: scaleX(1); }
.aif-topic-card:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

.aif-topic-card .ic-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--paper);
  border: 1px solid var(--tc-soft, var(--paper-3));
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--tc-deep, var(--ink-2));
  box-shadow: inset 0 -2px 0 rgba(26,26,38,.05);
}
.aif-topic-card .ic-wrap svg { width: 26px; height: 26px; }
.aif-topic-card .tc-title {
  display: block;
  margin-top: var(--r-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 36, "SOFT" 30;
  font-size: 1.35rem;
  line-height: 1.15;
  color: var(--ink);
}
.aif-topic-card .tc-verb {
  display: block;
  margin-top: 4px;
  font-size: .9rem;
  color: var(--ink-3);
  line-height: 1.4;
}
.aif-topic-card .tc-level {
  position: absolute;
  top: 14px; right: 14px;
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--tc-deep, var(--ink-3));
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: 999px;
  padding: 3px 8px;
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Locked (coming-soon) variant */
.aif-topic-card.is-locked {
  background: var(--paper-2);
  border-style: dashed;
  border-color: var(--paper-4);
  pointer-events: none;
}
.aif-topic-card.is-locked .ic-wrap { color: var(--ink-4); border-color: var(--paper-4); background: var(--paper); }
.aif-topic-card.is-locked .tc-title,
.aif-topic-card.is-locked .tc-verb { color: var(--ink-4); }
.aif-topic-card.is-locked::before { opacity: 0; }

/* Topic family palette mapping — applied via class="t-family-X" */
.t-study     { --tc-deep: var(--study-deep);     --tc-mid: var(--study-mid);     --tc-soft: var(--study-soft); }
.t-paprika   { --tc-deep: var(--paprika-deep);   --tc-mid: var(--paprika-mid);   --tc-soft: var(--paprika-soft); }
.t-aubergine { --tc-deep: var(--aubergine-deep); --tc-mid: var(--aubergine-mid); --tc-soft: var(--aubergine-soft); }
.t-wine      { --tc-deep: var(--wine-deep);      --tc-mid: var(--wine-mid);      --tc-soft: var(--wine-soft); }
.t-lagoon    { --tc-deep: var(--lagoon-deep);    --tc-mid: var(--lagoon-mid);    --tc-soft: var(--lagoon-soft); }
.t-tangerine { --tc-deep: var(--tangerine-deep); --tc-mid: var(--tangerine-mid); --tc-soft: var(--tangerine-soft); }
.t-slate     { --tc-deep: var(--slate-deep);     --tc-mid: var(--slate-mid);     --tc-soft: var(--slate-soft); }
.t-spring    { --tc-deep: var(--spring-deep);    --tc-mid: var(--spring-mid);    --tc-soft: var(--spring-soft); }
.t-indigo    { --tc-deep: var(--indigo-deep);    --tc-mid: var(--indigo-mid);    --tc-soft: var(--indigo-soft); }
.t-coral     { --tc-deep: var(--coral-deep);     --tc-mid: var(--coral-mid);     --tc-soft: var(--coral-soft); }

/* ---------- Topic page (form + response) ---------- */
.aif-topic-head {
  display: flex;
  align-items: center;
  gap: var(--r-3);
  margin-bottom: var(--r-4);
}
.aif-topic-head .ic-wrap {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: var(--tc-soft, var(--paper-2));
  color: var(--tc-deep, var(--ink-2));
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--tc-mid, var(--paper-3));
}
.aif-topic-head .ic-wrap svg { width: 28px; height: 28px; }
.aif-topic-head h1 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
}
.aif-topic-head .sub {
  display: block;
  margin-top: 4px;
  color: var(--ink-3);
  font-size: .92rem;
}

.aif-panel {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-lg);
  padding: var(--r-5);
  position: relative;
  overflow: hidden;
}
.aif-panel.is-tinted {
  background:
    linear-gradient(180deg, var(--tc-soft, var(--paper-2)) 0%, var(--paper) 70%),
    var(--paper);
}
.aif-panel .panel-rule {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--tc-deep, var(--ink));
}

/* Response card — visually tied to the form panel above it.
   Same tinted background + top accent rule so the answer reads as the
   second half of the same surface, not an afterthought. */
.aif-response-wrap {
  margin-top: var(--r-4);
  position: relative;
}
.aif-response-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--r-3);
  padding: 0 var(--r-5);
  margin-bottom: -1px; /* let the head sit flush against the panel below */
  position: relative;
  z-index: 1;
}
.aif-response-head .aif-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--tc-deep, var(--ink));
  color: var(--paper);
  padding: 5px 12px 6px;
  border-radius: 999px 999px 0 0;
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 700;
}
.aif-response-actions { display: flex; gap: 8px; }

.aif-response {
  background:
    linear-gradient(180deg, var(--tc-soft, var(--paper-2)) 0%, var(--paper) 60%),
    var(--paper);
  border: 1px solid var(--tc-mid, var(--paper-3));
  border-radius: var(--radius-lg);
  padding: var(--r-5);
  min-height: 140px;
  position: relative;
  overflow: hidden;
  overflow-wrap: anywhere;
  box-shadow: 0 14px 36px -22px rgba(26,26,38,.18);
}
.aif-response::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--tc-deep, var(--ink));
}
.aif-response.is-empty {
  min-height: 110px;
  background: var(--paper);
  border-style: dashed;
  box-shadow: none;
}
.aif-response.is-empty::before { opacity: .35; }
.aif-response.is-streaming {
  background:
    linear-gradient(110deg, var(--tc-soft, var(--paper-2)) 30%, var(--paper) 50%, var(--tc-soft, var(--paper-2)) 70%)
    0 0 / 200% 100%;
  animation: shimmer 2.4s linear infinite;
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* Markdown styling inside response */
.aif-response :first-child { margin-top: 0; }
.aif-response :last-child { margin-bottom: 0; }
.aif-response h1, .aif-response h2, .aif-response h3 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ink);
  margin: var(--r-4) 0 var(--r-2);
}
.aif-response h1 { font-size: 1.5rem; }
.aif-response h2 { font-size: 1.25rem; }
.aif-response h3 { font-size: 1.1rem; }
.aif-response p { margin: 0 0 var(--r-3); color: var(--ink-2); }
.aif-response ul, .aif-response ol { padding-left: 1.4em; margin: 0 0 var(--r-3); }
.aif-response li { margin: 4px 0; }
.aif-response strong { color: var(--ink); }
.aif-response a { color: var(--tc-deep, var(--ink-2)); text-decoration-color: var(--tc-mid, var(--paper-4)); }
.aif-response blockquote {
  margin: var(--r-3) 0;
  padding: 4px 0 4px var(--r-4);
  border-left: 3px solid var(--tc-mid, var(--paper-4));
  color: var(--ink-3);
  font-style: italic;
}
.aif-response code {
  font-family: var(--font-mono);
  font-size: .92em;
  background: var(--paper-2);
  padding: 2px 6px;
  border-radius: 6px;
  color: var(--ink);
}
.aif-response pre {
  font-family: var(--font-mono);
  background: var(--ink);
  color: var(--paper);
  padding: var(--r-4);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .9rem;
  line-height: 1.55;
  margin: var(--r-3) 0;
}
.aif-response pre code { background: transparent; color: inherit; padding: 0; }
.aif-response hr { border: 0; border-top: 1px solid var(--paper-3); margin: var(--r-4) 0; }

/* Pulsing dots placeholder */
.aif-dots { display: inline-flex; gap: 6px; padding: 4px 2px; align-items: center; }
.aif-dots span {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--tc-mid, var(--ink-4));
  opacity: .4;
  animation: dot 1.4s ease-in-out infinite;
}
.aif-dots span:nth-child(2) { animation-delay: .2s; }
.aif-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dot {
  0%, 100% { opacity: .25; transform: translateY(0); }
  50%      { opacity: 1;   transform: translateY(-3px); }
}

/* Form panel buttons row */
.aif-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--r-2);
  margin-top: var(--r-3);
}

/* ---------- Plans / pricing ---------- */
.aif-plans { display: grid; gap: var(--r-4); margin-top: var(--r-5); }
@media (min-width: 768px) { .aif-plans { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: stretch; } }

.aif-plan {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-lg);
  padding: var(--r-5);
  display: flex;
  flex-direction: column;
  gap: var(--r-3);
}
.aif-plans { padding-top: 16px; } /* leave room for the floating "Most popular" tag */
.aif-plan .ic-wrap {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--pl-soft, var(--paper-2));
  color: var(--pl-deep, var(--ink-2));
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--pl-mid, var(--paper-3));
}
.aif-plan .ic-wrap svg { width: 22px; height: 22px; }
.aif-plan h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.6rem;
  margin: 0;
  color: var(--ink);
}
.aif-plan .plan-desc { color: var(--ink-3); font-size: .95rem; margin: 0; flex: 1; min-height: 2.6em; }
.aif-plan .plan-price {
  display: flex; align-items: baseline; gap: 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--ink);
  margin: var(--r-2) 0;
  font-variation-settings: "opsz" 96, "SOFT" 30;
}
.aif-plan .plan-price small {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .85rem;
  color: var(--ink-4);
}
.aif-plan .plan-price.is-free { color: var(--success); }
.aif-plan .plan-limit { font-size: .9rem; color: var(--ink-3); display: flex; align-items: center; gap: 8px; }
.aif-plan .plan-limit svg { width: 16px; height: 16px; color: var(--pl-deep, var(--ink-3)); }
.aif-plan .plan-cta { margin-top: var(--r-3); }
.aif-plan.is-current { border-color: var(--pl-deep, var(--success)); border-width: 1.5px; }
.aif-plan.is-current .current-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .78rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--pl-deep, var(--success));
}
.aif-plan.is-recommended {
  border-color: var(--gold);
  box-shadow: 0 18px 40px -22px rgba(200,155,58,.55);
}
.aif-plan.is-recommended::before {
  content: "Most popular";
  position: absolute;
  top: -12px; right: 24px;
  background: var(--gold);
  color: var(--ink);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* Plan palette mapping (matches updated planColors/planIcons in middleware.ts) */
.p-fam-1 { --pl-deep: var(--success);        --pl-mid: var(--spring-mid);    --pl-soft: var(--spring-soft); }
.p-fam-2 { --pl-deep: var(--slate-deep);     --pl-mid: var(--slate-mid);     --pl-soft: var(--slate-soft); }
.p-fam-3 { --pl-deep: var(--aubergine-deep); --pl-mid: var(--aubergine-mid); --pl-soft: var(--aubergine-soft); }
.p-fam-4 { --pl-deep: var(--wine-deep);      --pl-mid: var(--wine-mid);      --pl-soft: var(--wine-soft); }
.p-fam-5 { --pl-deep: var(--tangerine-deep); --pl-mid: var(--tangerine-mid); --pl-soft: var(--tangerine-soft); }
.p-fam-6 { --pl-deep: var(--coral-deep);     --pl-mid: var(--coral-mid);     --pl-soft: var(--coral-soft); }
.p-fam-7 { --pl-deep: var(--lagoon-deep);    --pl-mid: var(--lagoon-mid);    --pl-soft: var(--lagoon-soft); }
.p-fam-8 { --pl-deep: var(--indigo-deep);    --pl-mid: var(--indigo-mid);    --pl-soft: var(--indigo-soft); }
.p-fam-9 { --pl-deep: var(--paprika-deep);   --pl-mid: var(--paprika-mid);   --pl-soft: var(--paprika-soft); }
.p-fam-10{ --pl-deep: var(--study-deep);     --pl-mid: var(--study-mid);     --pl-soft: var(--study-soft); }

/* ---------- Auth pages ---------- */
.aif-auth {
  display: grid;
  gap: var(--r-5);
  align-items: center;
  margin-top: var(--r-6);
}
@media (min-width: 900px) { .aif-auth { grid-template-columns: 1.05fr 1fr; gap: var(--r-7); } }

.aif-auth-aside {
  display: none;
}
@media (min-width: 900px) {
  .aif-auth-aside {
    display: block;
    padding: var(--r-6);
    background:
      radial-gradient(80% 60% at 20% 10%, var(--gold-soft) 0%, transparent 60%),
      radial-gradient(70% 50% at 90% 90%, var(--lagoon-soft) 0%, transparent 60%),
      var(--paper-2);
    border: 1px solid var(--paper-3);
    border-radius: var(--radius-xl);
    min-height: 420px;
  }
}
.aif-auth-aside .quote {
  font-family: var(--font-display);
  font-style: italic;
  font-variation-settings: "opsz" 96, "SOFT" 60, "slnt" -8;
  font-size: 1.6rem;
  line-height: 1.25;
  color: var(--ink);
  margin: var(--r-4) 0;
}
.aif-auth-aside .quote-attrib {
  color: var(--ink-4);
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-weight: 600;
}
.aif-auth-form {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-xl);
  padding: var(--r-6);
  box-shadow: var(--shadow-paper);
}

/* ---------- Modal (native <dialog>) ---------- */
.aif-modal {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(560px, calc(100vw - var(--r-4)));
  width: 100%;
  color: inherit;
}
.aif-modal::backdrop {
  background: rgba(20, 18, 14, 0.45);
  backdrop-filter: blur(2px);
}
.aif-modal-content {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.aif-modal-header {
  border-bottom: 1px solid var(--paper-3);
  padding: var(--r-4) var(--r-5);
  background: var(--paper-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--r-3);
}
.aif-modal-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.4rem;
  color: var(--ink);
  margin: 0;
  display: flex; align-items: center; gap: 10px;
}
.aif-modal-body { padding: var(--r-5); }
.aif-modal-footer {
  border-top: 1px solid var(--paper-3);
  padding: var(--r-4) var(--r-5);
  background: var(--paper-2);
  display: flex;
  gap: var(--r-2);
  flex-wrap: wrap;
}
.aif-modal-close {
  background: transparent;
  border: 0;
  padding: 4px;
  cursor: pointer;
  color: var(--ink-3);
  line-height: 0;
  border-radius: 6px;
}
.aif-modal-close:hover { color: var(--ink); background: var(--paper-3); }

/* ---------- Admin ---------- */
.aif-stats { display: grid; gap: var(--r-3); margin: var(--r-4) 0 var(--r-5); }
@media (min-width: 640px) { .aif-stats { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .aif-stats { grid-template-columns: repeat(4, 1fr); } }

.aif-stat {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: var(--r-4) var(--r-5);
  overflow: hidden;
}
.aif-stat::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--stat-color, var(--ink-3));
}
.aif-stat .stat-label {
  display: flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-4);
}
.aif-stat .stat-label svg { width: 16px; height: 16px; color: var(--stat-color, var(--ink-3)); }
.aif-stat .stat-value {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.05;
  color: var(--ink);
  margin-top: 8px;
  font-variant-numeric: tabular-nums;
}
.aif-stat.s-users    { --stat-color: var(--slate-mid); }
.aif-stat.s-active   { --stat-color: var(--spring-mid); }
.aif-stat.s-queries  { --stat-color: var(--lagoon-mid); }
.aif-stat.s-month    { --stat-color: var(--wine-mid); }
.aif-stat.s-cost     { --stat-color: var(--indigo-mid); }
.aif-stat.s-cost-mo  { --stat-color: var(--gold); }

/* Responsive admin user table → cards on small screens */
.aif-table-card {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  overflow: hidden;
}
.aif-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
}
.aif-table th {
  text-align: left;
  padding: 12px 14px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-4);
  border-bottom: 1px solid var(--paper-3);
  background: var(--paper-2);
}
.aif-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--paper-3);
  vertical-align: middle;
  color: var(--ink-2);
}
.aif-table tr:last-child td { border-bottom: 0; }
.aif-table tr:hover td { background: var(--paper-2); }
.aif-table .num { font-variant-numeric: tabular-nums; color: var(--ink); }

.aif-pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  background: var(--paper-2);
  color: var(--ink-3);
  border: 1px solid var(--paper-3);
}
.aif-pill .ic, .aif-pill svg { width: 14px; height: 14px; flex: none; }
.aif-pill.is-admin { background: var(--gold-soft); color: var(--gold-2); border-color: var(--gold); }
.aif-pill.is-paid  { background: var(--spring-soft); color: var(--spring-deep); border-color: var(--spring-mid); }
.aif-pill.is-free  { background: var(--paper-2); color: var(--ink-3); }

/* Small screens: hide the table; show stacked cards (filled by script) */
.aif-user-cards { display: grid; gap: var(--r-3); }
.aif-user-card {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: var(--r-4);
  display: grid;
  gap: 8px;
}
.aif-user-card .u-name { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; }
.aif-user-card .u-meta { font-size: .82rem; color: var(--ink-4); }
.aif-user-card .u-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.aif-user-card .u-num { font-variant-numeric: tabular-nums; font-weight: 600; }

/* ---------- Admin: recent activity ---------- */
.aif-activity { display: grid; gap: var(--r-2); }
.aif-activity-item {
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-left: 3px solid var(--tc-mid, var(--paper-3));
  border-radius: 10px;
  padding: 0;
  overflow: hidden;
}
.aif-activity-item > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--r-3);
  display: grid;
  gap: .35rem;
}
.aif-activity-item > summary::-webkit-details-marker { display: none; }
.aif-activity-item > summary:hover { background: var(--paper-2); }
.aif-activity-item[open] > summary { border-bottom: 1px solid var(--paper-3); }
.aif-activity-preview {
  color: var(--ink-3);
  font-size: .92rem;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.aif-activity-body { padding: var(--r-3); display: grid; gap: var(--r-3); }
.aif-activity-section { display: block; }
.aif-activity-pre {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: .85rem;
  line-height: 1.5;
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: 8px;
  padding: var(--r-2) var(--r-3);
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink-2);
}

.show-md-up { display: none; }
@media (min-width: 768px) {
  .show-md-up { display: revert; }
  .hide-md-up { display: none !important; }
}

/* ---------- Coming-soon panel ---------- */
.aif-soon {
  background: var(--paper);
  border: 1px dashed var(--paper-4);
  border-radius: var(--radius-xl);
  padding: var(--r-7) var(--r-5);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.aif-soon::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 40% at 50% 30%, var(--tc-soft, var(--paper-2)) 0%, transparent 70%);
  z-index: 0;
}
.aif-soon > * { position: relative; z-index: 1; }
.aif-soon .ic-wrap {
  width: 72px; height: 72px;
  border-radius: 22px;
  background: var(--paper);
  border: 1px solid var(--tc-mid, var(--paper-3));
  color: var(--tc-deep, var(--ink-3));
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--r-3);
}
.aif-soon .ic-wrap svg { width: 36px; height: 36px; }

/* ---------- Footer ---------- */
.aif-foot {
  margin-top: var(--r-7);
  padding: var(--r-5) var(--r-4);
  border-top: 1px solid var(--paper-3);
  background: var(--paper-2);
  font-size: .85rem;
  color: var(--ink-4);
  text-align: center;
}
.aif-foot a { color: var(--ink-3); }
.aif-foot .sep { margin: 0 8px; color: var(--paper-4); }
.aif-foot .mark { color: var(--gold-2); }

/* ---------- Utility ---------- */
.aif-stack > * + * { margin-top: var(--r-3); }
.aif-cluster { display: flex; flex-wrap: wrap; gap: var(--r-2); align-items: center; }
.aif-divider { border: 0; border-top: 1px solid var(--paper-3); margin: var(--r-5) 0; }
.aif-mt-5 { margin-top: var(--r-5); }
.aif-mt-6 { margin-top: var(--r-6); }
.text-success { color: var(--success); }
.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; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .aif-topic-card { animation: none; opacity: 1; }
  .aif-response.is-streaming { animation: none; }
  .aif-dots span { animation: none; opacity: .6; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* Print: keep the response readable */
@media print {
  .aif-nav, .aif-foot, .aif-form-actions, .aif-response-actions { display: none !important; }
  body.aif { background: #fff; padding-top: 0; }
  .aif-response { border: 0; padding: 0; }
}