/* AI FIN — shared app shell + tokens */
:root {
  --bg:      oklch(14% 0.006 250);
  --surface: oklch(21% 0.008 250);
  --surface-2: oklch(25% 0.008 250);
  --fg:      oklch(96% 0.004 96);
  --muted:   oklch(62% 0.010 96);
  --border:  oklch(28% 0.008 250);
  --accent:  oklch(78% 0.13 82);
  --accent-soft: color-mix(in oklch, var(--accent) 16%, transparent);
  --fg-soft: color-mix(in oklch, var(--fg) 6%, transparent);
  --up:      oklch(68% 0.16 145);
  --down:    oklch(62% 0.18 25);
  --warn:    oklch(72% 0.14 90);

  --font-display: 'Inter', 'SF Pro Display', system-ui, sans-serif;
  --font-body:    -apple-system, 'SF Pro Text', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, monospace;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

/* ── logo ── */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo img {
  height: 32px;
  width: auto;
  border-radius: 8px;
  object-fit: contain;
}
.logo .logo-text {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.logo .logo-text .ai { color: var(--accent); }
.logo .logo-text .fin { color: var(--fg); }
.logo .logo-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ── page shell (responsive) ── */
.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg);
  position: relative;
}
@media (min-width: 768px) {
  .app { max-width: 720px; }
}
@media (min-width: 1024px) {
  .app { max-width: 960px; }
}

/* ── shared components ── */
.tabbar {
  position: sticky;
  bottom: 0;
  background: oklch(18% 0.006 250);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom, 0px));
  z-index: 10;
  flex-shrink: 0;
}
.tabbar .tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 10px;
  font-family: var(--font-body);
  letter-spacing: 0.02em;
  padding: 4px 8px;
  border: 0;
  background: none;
  flex: 1;
}
.tabbar .tab.active { color: var(--accent); }
.tabbar .tab svg { width: 22px; height: 22px; }
.tabbar .tab .dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -2px;
  opacity: 0;
}
.tabbar .tab.active .dot { opacity: 1; }

/* ── float back button ── */
.float-back {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 100;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.3);
  transition: transform 0.1s ease, background 0.15s ease;
}
.float-back:hover {
  background: var(--accent-soft);
  transform: scale(1.08);
}
.float-back:active {
  transform: scale(0.96);
}
.float-back svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
}
@media (min-width: 1024px) {
  .float-back { right: calc(50% - 500px); }
}

/* ── shared components ── */
.section-pad { padding: 0 20px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 16px;
}

.pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  background: var(--accent-soft);
  color: var(--accent);
}
.pill.up { background: color-mix(in oklch, var(--up) 14%, transparent); color: var(--up); }
.pill.down { background: color-mix(in oklch, var(--down) 14%, transparent); color: var(--down); }
.pill.warn { background: color-mix(in oklch, var(--warn) 14%, transparent); color: var(--warn); }
.pill.neutral { background: var(--fg-soft); color: var(--muted); }

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.num.up { color: var(--up); }
.num.down { color: var(--down); }
.num.accent { color: var(--accent); }

.muted { color: var(--muted); }
.sm { font-size: 12px; }
.xs { font-size: 10px; }
.mono { font-family: var(--font-mono); }

/* ── header row ── */
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 8px;
}
.header-row .avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: grid; place-items: center;
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  font-family: var(--font-display);
}
.header-row .actions { display: flex; gap: 12px; }

/* ── section header ── */
.sec-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 12px;
}
.sec-head h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.sec-head .see-all {
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
}