/* ── FRANK — The Why Engine — Stylesheet ─────────────────────────────────── */

:root {
  --bg:      #0a0a12;
  --bg2:     #10101e;
  --bg3:     #16162a;
  --bg4:     #1c1c32;
  --border:  rgba(255,255,255,.08);
  --border2: rgba(255,255,255,.14);
  --t1:      #e8e8f4;
  --t2:      #9090b0;
  --t3:      #55556a;
  --purple:  #a855f7;
  --purple2: #7c3aed;
  --purple-bg: rgba(168,85,247,.10);
  --purple-bd: rgba(168,85,247,.30);
  --cyan:    #06b6d4;
  --green:   #22c55e;
  --amber:   #f59e0b;
  --red:     #ef4444;
  --r:       8px;
  --r2:      12px;
  --r3:      18px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--t1);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--purple); text-decoration: none; }
a:hover { color: var(--cyan); }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }

/* ── Nav ──────────────────────────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 100;
  min-height: 60px;
  display: flex; align-items: center; flex-wrap: wrap;
  padding: 0 32px;
  background: rgba(10,10,18,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  gap: 20px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 800; letter-spacing: -.5px; color: var(--t1);
}
.nav-brand .badge {
  font-size: 9px; font-weight: 700; padding: 2px 8px;
  background: var(--purple-bg); border: 1px solid var(--purple-bd);
  color: var(--purple); border-radius: 20px; letter-spacing: .8px;
  text-transform: uppercase;
}
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; row-gap: 4px; }
.nav-link {
  padding: 6px 14px; border-radius: var(--r); font-size: 13px;
  color: var(--t2); font-weight: 500; transition: .15s;
}
.nav-link:hover { background: var(--bg3); color: var(--t1); }
.nav-btn {
  padding: 7px 18px; border-radius: var(--r);
  background: var(--purple); color: #fff; font-size: 13px; font-weight: 700;
  cursor: pointer; border: none; font-family: inherit; transition: .15s;
}
.nav-btn:hover { background: var(--purple2); }

/* ── Layout containers ────────────────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 560px; margin: 0 auto; padding: 0 24px; }

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 100px 24px 80px;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(168,85,247,.18) 0%, transparent 70%);
  position: relative; overflow: hidden;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--purple);
  background: var(--purple-bg); border: 1px solid var(--purple-bd);
  padding: 5px 14px; border-radius: 20px; margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 900; line-height: 1.08;
  letter-spacing: -2px;
  background: linear-gradient(135deg, #fff 0%, #c084fc 60%, #06b6d4 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 24px;
}
.hero-sub {
  font-size: 18px; color: var(--t2); max-width: 580px;
  margin: 0 auto 40px; line-height: 1.7;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 32px; border-radius: var(--r2);
  background: linear-gradient(135deg, var(--purple) 0%, var(--purple2) 100%);
  color: #fff; font-size: 15px; font-weight: 700;
  cursor: pointer; border: none; font-family: inherit; transition: .18s;
  box-shadow: 0 4px 24px rgba(168,85,247,.35);
  display: inline-block;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(168,85,247,.5);
  color: #fff;
}
.btn-secondary {
  padding: 14px 32px; border-radius: var(--r2);
  background: var(--bg3); border: 1px solid var(--border2);
  color: var(--t1); font-size: 15px; font-weight: 600;
  cursor: pointer; font-family: inherit; transition: .18s;
  display: inline-block;
}
.btn-secondary:hover { background: var(--bg4); border-color: var(--border2); color: var(--t1); }

/* ── Stats bar ────────────────────────────────────────────────────────────── */
.stats-bar {
  display: flex; justify-content: center; gap: 48px;
  padding: 32px 24px;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  background: var(--bg2); flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num { font-size: 32px; font-weight: 800; color: var(--purple); }
.stat-lbl { font-size: 11px; color: var(--t3); text-transform: uppercase; letter-spacing: .8px; margin-top: 2px; }

/* ── Section ──────────────────────────────────────────────────────────────── */
.section { padding: 80px 24px; }
.section-title {
  font-size: 36px; font-weight: 800; letter-spacing: -.8px;
  margin-bottom: 12px;
}
.section-sub { font-size: 16px; color: var(--t2); margin-bottom: 48px; }

/* ── Layer cards ──────────────────────────────────────────────────────────── */
.layers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}
.layer-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r3); padding: 28px;
  transition: .2s; position: relative; overflow: hidden;
}
.layer-card:hover { border-color: var(--purple-bd); background: var(--bg3); }
.layer-card::before {
  content: attr(data-num);
  position: absolute; top: 16px; right: 20px;
  font-size: 64px; font-weight: 900; color: rgba(168,85,247,.06);
  line-height: 1; pointer-events: none;
}
.layer-num {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 10px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 14px;
  background: var(--purple-bg); border: 1px solid var(--purple-bd);
  color: var(--purple);
}
.layer-title { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.layer-desc { font-size: 13px; color: var(--t2); line-height: 1.65; }

/* ── Feature grid ─────────────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px; margin-top: 40px;
}
.feature-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 20px;
}
.feature-icon { font-size: 28px; margin-bottom: 10px; }
.feature-title { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.feature-desc { font-size: 12px; color: var(--t2); }

/* ── Auth card ────────────────────────────────────────────────────────────── */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 24px; }
.auth-card {
  width: 100%; max-width: 480px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r3); padding: 40px;
}
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo .brand { font-size: 26px; font-weight: 900; letter-spacing: -1px; }
.auth-logo .brand span { color: var(--purple); }
.auth-logo .tagline { font-size: 12px; color: var(--t3); margin-top: 4px; }
.auth-title { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.auth-sub { font-size: 13px; color: var(--t2); margin-bottom: 28px; }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label {
  display: block; font-size: 12px; font-weight: 600;
  color: var(--t2); text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 6px;
}
input[type=text], input[type=email], input[type=password],
input[type=date], input[type=number], select, textarea {
  width: 100%; padding: 11px 14px;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: var(--r); color: var(--t1); font-size: 14px;
  font-family: inherit; transition: .15s; outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--purple); background: var(--bg4);
  box-shadow: 0 0 0 3px rgba(168,85,247,.15);
}
input::placeholder { color: var(--t3); }
textarea { resize: vertical; min-height: 80px; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2355556a'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 32px; }

/* ── Password strength ────────────────────────────────────────────────────── */
.pw-strength-wrap { margin-top: 6px; }
.pw-strength-bar { height: 3px; background: var(--bg4); border-radius: 2px; overflow: hidden; margin-bottom: 4px; }
.pw-strength-fill { height: 100%; width: 0%; border-radius: 2px; transition: width .3s, background .3s; }
.pw-strength-label { font-size: 10px; color: var(--t3); }

/* ── DOB age info ─────────────────────────────────────────────────────────── */
.field-hint { font-size: 11px; color: var(--t3); margin-top: 5px; }
.field-hint.ok { color: var(--green); }
.field-hint.err { color: var(--red); }

/* ── Submit button ────────────────────────────────────────────────────────── */
.btn-submit {
  width: 100%; padding: 13px;
  background: linear-gradient(135deg, var(--purple), var(--purple2));
  color: #fff; font-size: 15px; font-weight: 700;
  border: none; border-radius: var(--r2); cursor: pointer;
  font-family: inherit; transition: .18s; margin-top: 8px;
}
.btn-submit:hover { opacity: .9; transform: translateY(-1px); }
.btn-submit:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ── Alert ────────────────────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px; border-radius: var(--r); font-size: 13px;
  margin-bottom: 20px; display: flex; align-items: flex-start; gap: 10px;
}
.alert-error { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); color: #fca5a5; }
.alert-success { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.3); color: #86efac; }
.alert-info { background: var(--purple-bg); border: 1px solid var(--purple-bd); color: #d8b4fe; }

/* ── Dashboard layout ─────────────────────────────────────────────────────── */
.dash-wrap { max-width: 1100px; margin: 0 auto; padding: 40px 24px; }
.dash-header { margin-bottom: 36px; }
.dash-header h1 { font-size: 28px; font-weight: 800; margin-bottom: 4px; }
.dash-header p { color: var(--t2); font-size: 14px; }

.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; margin-bottom: 32px;
}
.dash-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 22px;
}
.dash-card-label { font-size: 10px; color: var(--t3); text-transform: uppercase; letter-spacing: .7px; margin-bottom: 8px; }
.dash-card-value { font-size: 32px; font-weight: 800; }
.dash-card-sub { font-size: 12px; color: var(--t3); margin-top: 4px; }
.dash-card.purple { border-color: var(--purple-bd); }
.dash-card.purple .dash-card-value { color: var(--purple); }
.dash-card.cyan .dash-card-value { color: var(--cyan); }
.dash-card.green .dash-card-value { color: var(--green); }
.dash-card.amber .dash-card-value { color: var(--amber); }

.dash-actions {
  display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 36px;
}
.action-tile {
  flex: 1; min-width: 200px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 22px;
  text-align: center; cursor: pointer; transition: .18s;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--t1);
}
.action-tile:hover { border-color: var(--purple-bd); background: var(--bg3); color: var(--t1); transform: translateY(-2px); }
.action-tile-icon { font-size: 32px; }
.action-tile-name { font-size: 15px; font-weight: 700; }
.action-tile-desc { font-size: 12px; color: var(--t2); }

/* ── Upload panel ─────────────────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border2); border-radius: var(--r2);
  padding: 48px 24px; text-align: center; cursor: pointer;
  transition: .2s; background: var(--bg3); margin-bottom: 24px;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--purple); background: var(--purple-bg);
}
.upload-zone-icon { font-size: 40px; margin-bottom: 14px; }
.upload-zone-title { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.upload-zone-sub { font-size: 12px; color: var(--t2); }

.upload-list { display: flex; flex-direction: column; gap: 10px; }
.upload-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--r); padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
}
.upload-item-name { flex: 1; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-item-size { font-size: 11px; color: var(--t3); }
.upload-status {
  font-size: 10px; font-weight: 700; padding: 3px 8px;
  border-radius: 20px; text-transform: uppercase; letter-spacing: .4px;
}
.upload-status.pending  { background: rgba(245,158,11,.1); color: var(--amber); border: 1px solid rgba(245,158,11,.3); }
.upload-status.indexing { background: rgba(6,182,212,.1); color: var(--cyan); border: 1px solid rgba(6,182,212,.3); }
.upload-status.indexed  { background: rgba(34,197,94,.1); color: var(--green); border: 1px solid rgba(34,197,94,.3); }
.upload-status.failed   { background: rgba(239,68,68,.1); color: var(--red); border: 1px solid rgba(239,68,68,.3); }

/* ── Query panel ──────────────────────────────────────────────────────────── */
.query-box {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r3); padding: 28px; margin-bottom: 24px;
}
.query-input-wrap { display: flex; gap: 10px; margin-bottom: 8px; }
.query-input {
  flex: 1; padding: 14px 18px;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: var(--r2); color: var(--t1); font-size: 15px;
  font-family: inherit; outline: none; transition: .15s;
}
.query-input:focus { border-color: var(--purple); box-shadow: 0 0 0 3px rgba(168,85,247,.15); }
.query-btn {
  padding: 14px 24px; border-radius: var(--r2);
  background: var(--purple); color: #fff; font-size: 14px; font-weight: 700;
  border: none; cursor: pointer; font-family: inherit; transition: .15s;
  white-space: nowrap;
}
.query-btn:hover { background: var(--purple2); }
.query-btn:disabled { opacity: .5; cursor: not-allowed; }
.query-examples { display: flex; gap: 8px; flex-wrap: wrap; }
.query-example {
  padding: 6px 12px; border-radius: 20px; font-size: 11px;
  background: var(--bg4); border: 1px solid var(--border);
  color: var(--t2); cursor: pointer; transition: .12s;
}
.query-example:hover { border-color: var(--purple-bd); color: var(--purple); }

.answer-card {
  background: var(--bg2); border: 1px solid var(--purple-bd);
  border-radius: var(--r3); padding: 28px; margin-bottom: 18px;
  display: none;
}
.answer-card.show { display: block; }
.answer-header { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.answer-badge {
  font-size: 10px; font-weight: 700; padding: 4px 10px;
  background: var(--purple-bg); border: 1px solid var(--purple-bd);
  color: var(--purple); border-radius: 20px; letter-spacing: .5px; white-space: nowrap;
}
.confidence-badge {
  font-size: 10px; font-weight: 700; padding: 4px 10px;
  border-radius: 20px; letter-spacing: .5px; white-space: nowrap;
}
.confidence-badge.high { background: rgba(34,197,94,.1); color: var(--green); border: 1px solid rgba(34,197,94,.3); }
.confidence-badge.mid  { background: rgba(245,158,11,.1); color: var(--amber); border: 1px solid rgba(245,158,11,.3); }
.confidence-badge.low  { background: rgba(239,68,68,.1);  color: var(--red);   border: 1px solid rgba(239,68,68,.3); }
.answer-text { font-size: 14px; color: var(--t1); line-height: 1.75; white-space: pre-wrap; }
.answer-text strong { color: var(--purple); }

/* ── History table ────────────────────────────────────────────────────────── */
.panel {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r2); overflow: hidden; margin-bottom: 24px;
}
.panel-hdr {
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.panel-title { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .6px; color: var(--t2); }
table { width: 100%; border-collapse: collapse; }
th { font-size: 10px; font-weight: 700; color: var(--t3); text-transform: uppercase; letter-spacing: .6px; padding: 10px 20px; text-align: left; border-bottom: 1px solid var(--border); }
td { padding: 12px 20px; font-size: 13px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg3); }
.td-trunc { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Progress / spinner ───────────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px; border-radius: 50%;
  border: 2px solid var(--border2); border-top-color: var(--purple);
  animation: spin .7s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap { display: flex; align-items: center; gap: 12px; color: var(--t2); font-size: 13px; padding: 20px 0; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border); padding: 40px 24px;
  text-align: center; color: var(--t3); font-size: 12px;
}
footer strong { color: var(--purple); }

/* ── Utility ──────────────────────────────────────────────────────────────── */
.text-purple { color: var(--purple); }
.text-cyan   { color: var(--cyan); }
.text-muted  { color: var(--t2); }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.divider { height: 1px; background: var(--border); margin: 24px 0; }
.tag {
  display: inline-block; font-size: 10px; font-weight: 700;
  padding: 2px 8px; border-radius: 20px; text-transform: uppercase; letter-spacing: .5px;
}
.tag-purple { background: var(--purple-bg); border: 1px solid var(--purple-bd); color: var(--purple); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
/* Ask FRANK two-column layout (main + examples sidebar) */
.ask-grid { display: grid; grid-template-columns: 1fr 280px; gap: 32px; align-items: start; }

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 36px; }
  nav { padding: 8px 12px; flex-wrap: wrap; height: auto; row-gap: 2px; }
  .auth-card { padding: 24px; }
  .query-input-wrap { flex-direction: column; }
  .dash-actions { flex-direction: column; }
  .stats-bar { gap: 24px; }

  /* ── iPhone fixes ── */
  .ask-grid { grid-template-columns: 1fr; gap: 20px; }   /* stack: examples drop below */
  .dash-wrap { padding: 20px 14px; }
  .dash-header h1 { font-size: 22px; }
  .nav-links { flex-wrap: wrap; gap: 4px; row-gap: 6px; }
  .nav-link { padding: 6px 8px; font-size: 13px; }
  /* answer text must wrap, never overflow the screen */
  .answer-body { word-wrap: break-word; overflow-wrap: anywhere; }
  .answer-body pre, .answer-body code { white-space: pre-wrap; word-break: break-word; }
  /* wide tables scroll instead of blowing out the layout */
  .panel table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .td-trunc { max-width: 60vw; }
  /* dashboard stat cards + grids stack full width */
  .dash-cards, .dash-grid { grid-template-columns: 1fr !important; }
  .dash-card-value { font-size: 26px; }
  /* tap targets */
  .btn-primary, .btn-act, button { min-height: 40px; }
}