/* ============================================================
   Kế Toán Agent · Mobile-First PWA
   Design system: hybrid OLED + warm editorial
   ============================================================ */

:root {
  /* ===== Color tokens (dark default, OLED-first) ===== */
  --bg-canvas: #07070a;
  --bg-shell:  #0d0d10;
  --bg-card-1: #111114;
  --bg-card-2: #16161a;
  --bg-card-3: #1c1c20;

  --line-faint: rgba(255, 255, 255, 0.06);
  --line-soft:  rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.16);

  --ink-1: #f5f5f4;        /* near white */
  --ink-2: #c8c8c4;        /* secondary text */
  --ink-3: #8a8a86;        /* muted */
  --ink-4: #5e5e5c;        /* placeholder */
  --ink-5: #3a3a38;        /* faint */

  --accent:    #e8e4d8;    /* warm off-white */
  --accent-2:  #fde7a8;    /* pale gold */
  --accent-3:  #b6e6cf;    /* pale green */

  /* Pastel accents (for tags) */
  --pastel-red-bg:    #2a1414; --pastel-red-tx:   #f5b8b8;
  --pastel-blue-bg:   #0f1d2b; --pastel-blue-tx:  #aed1ee;
  --pastel-green-bg:  #102016; --pastel-green-tx: #b9e3c5;
  --pastel-yellow-bg: #2a1f08; --pastel-yellow-tx:#f0d28a;

  /* Semantic */
  --in:  #5fc28a;
  --out: #e07488;

  /* Type */
  --font-serif: 'Instrument Serif', 'Newsreader', 'Times New Roman', serif;
  --font-sans:  'Geist', 'SF Pro Display', -apple-system, system-ui, sans-serif;
  --font-mono:  'Geist Mono', 'SF Mono', ui-monospace, monospace;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --dur-quick: 220ms;
  --dur-base: 400ms;
  --dur-slow: 700ms;

  /* Layout */
  --bar-h: 64px;
  --tab-h: 76px;
  --max-content: 480px;
  --rad-card: 22px;
  --rad-shell: 28px;
  --rad-inner: calc(var(--rad-shell) - 6px);
}

/* Light theme override via toggle (future-proofing; default stays dark) */
.theme-light {
  --bg-canvas: #FDFBF7;
  --bg-shell:  #F7F5F0;
  --bg-card-1: #FFFFFF;
  --bg-card-2: #FAF8F3;
  --bg-card-3: #FFFFFF;
  --line-faint: rgba(0,0,0,0.04);
  --line-soft:  rgba(0,0,0,0.06);
  --line-strong: rgba(0,0,0,0.12);
  --ink-1: #1a1a18;
  --ink-2: #4a4a47;
  --ink-3: #82827d;
  --ink-4: #b4b4af;
  --ink-5: #d8d8d2;
  --accent:  #2a2a28;
  --accent-2:#9a7611;
  --accent-3:#2f6c4a;
  --pastel-red-bg:    #FDEBEC; --pastel-red-tx:   #9F2F2D;
  --pastel-blue-bg:   #E1F3FE; --pastel-blue-tx:  #1F6C9F;
  --pastel-green-bg:  #EDF3EC; --pastel-green-tx: #346538;
  --pastel-yellow-bg: #FBF3DB; --pastel-yellow-tx:#956400;
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  background: var(--bg-canvas);
  color: var(--ink-1);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  overscroll-behavior-y: contain;
  scroll-behavior: smooth;
}
body { letter-spacing: -0.005em; }

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; padding: 0; }
input { font: inherit; color: inherit; background: transparent; border: none; outline: none; }
ul { list-style: none; margin: 0; padding: 0; }

::selection { background: var(--accent); color: var(--bg-canvas); }

/* iOS safe areas */
.safe-top    { padding-top:    max(env(safe-area-inset-top),    0.75rem); }
.safe-bottom { padding-bottom: max(env(safe-area-inset-bottom), 0.75rem); }

/* ============================================================
   Ambient backdrop (fixed, no pointer events, low perf cost)
   ============================================================ */
.ambient {
  position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden;
}
.ambient-orb {
  position: absolute; border-radius: 50%;
  width: 80vmax; height: 80vmax;
  filter: blur(80px);
  opacity: 0.18;
  animation: drift 28s ease-in-out infinite alternate;
}
.ambient-orb-1 {
  top: -30vmax; left: -20vmax;
  background: radial-gradient(circle, #6b4a9c, transparent 60%);
}
.ambient-orb-2 {
  bottom: -40vmax; right: -25vmax;
  background: radial-gradient(circle, #3a7a8c, transparent 60%);
  animation-duration: 36s; animation-direction: alternate-reverse;
}
.ambient-noise {
  position: absolute; inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.4' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

@keyframes drift {
  0%   { transform: translate(0, 0)     scale(1); }
  50%  { transform: translate(8vw, -6vh) scale(1.05); }
  100% { transform: translate(-6vw, 5vh) scale(0.97); }
}

/* ============================================================
   App shell
   ============================================================ */
.app {
  position: relative; z-index: 1;
  min-height: 100dvh;
  max-width: var(--max-content);
  margin: 0 auto;
  padding-bottom: calc(var(--tab-h) + env(safe-area-inset-bottom) + 88px); /* room for composer */
  background: var(--bg-shell);
  border-left: 1px solid var(--line-faint);
  border-right: 1px solid var(--line-faint);
}

/* ============================================================
   Top bar
   ============================================================ */
.top-bar {
  position: sticky; top: 0; z-index: 30;
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-top)) 1rem;
  background: color-mix(in oklab, var(--bg-shell) 70%, transparent);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  border-bottom: 1px solid var(--line-faint);
}
.top-bar::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 30%, var(--line-strong) 70%, transparent);
  opacity: 0.3;
}

.icon-btn {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  color: var(--ink-2);
  transition: background var(--dur-quick) var(--ease-out), transform var(--dur-quick) var(--ease-spring), color var(--dur-quick);
}
.icon-btn:hover { background: rgba(255,255,255,0.05); color: var(--ink-1); }
.icon-btn:active { transform: scale(0.94); }

.brand {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.brand-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 12px var(--accent-2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.6; transform: scale(0.85); }
}
.brand-mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-1);
}
.brand-mark em {
  font-style: normal;
  color: var(--ink-3);
  margin-left: 0.25rem;
  font-weight: 400;
}

/* ============================================================
   Content & views
   ============================================================ */
.content {
  position: relative;
  padding: 0 1rem 2rem;
}

.view {
  display: none;
  padding-top: 1rem;
  animation: viewIn var(--dur-slow) var(--ease-out);
}
.view-active { display: block; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 1.75rem 0.5rem 1.5rem;
  animation: rise var(--dur-slow) var(--ease-out);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); filter: blur(6px); }
  to   { opacity: 1; transform: translateY(0); filter: blur(0); }
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.35rem 0.7rem 0.35rem 0.55rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-faint);
  font-family: var(--font-mono);
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--ink-2);
  margin-bottom: 1.25rem;
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px var(--accent-2);
}
.eyebrow-dot.dot-green { background: var(--in); box-shadow: 0 0 8px var(--in); }
.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.2rem, 9vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
  color: var(--ink-1);
}
.hero-title em {
  font-style: italic;
  color: var(--accent-2);
}
.hero-accent {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
}
.hero-sub {
  margin: 0; max-width: 32ch;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.6;
}
.hero-sub strong { color: var(--ink-1); font-weight: 500; }

/* ============================================================
   Bento grids
   ============================================================ */
.bento {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.bento-2 {
  grid-template-columns: 1fr 1fr;
}
.bento-2 .card-action-primary { grid-column: 1 / 2; }
.bento-2 .card-action { grid-column: 2 / 3; }

.bento-balance {
  grid-template-columns: 1.6fr 1fr;
  grid-template-rows: auto auto;
}
.bento-balance .card-balance { grid-column: 1 / 3; }
.bento-balance .card-mini-in  { grid-column: 1 / 2; }
.bento-balance .card-mini-out { grid-column: 2 / 3; }

.bento-reports {
  grid-template-columns: 1fr 1fr;
}
.bento-reports .card-report-large { grid-column: 1 / 3; }
.bento-reports .card-report { grid-column: span 1; }

@media (max-width: 360px) {
  .bento-reports .card-report-large { grid-column: 1 / 3; }
  .bento-reports .card-report { grid-column: 1 / 3; }
}

/* ============================================================
   Cards (Double-Bezel architecture)
   ============================================================ */
.card {
  position: relative;
  border-radius: var(--rad-shell);
  padding: 1px;
  background: linear-gradient(135deg, var(--line-soft), var(--line-faint) 40%, var(--line-soft));
  transition:
    transform var(--dur-base) var(--ease-spring),
    background var(--dur-base) var(--ease-out);
  will-change: transform;
}
.card:active { transform: scale(0.985); }

.card-inner {
  position: relative;
  border-radius: var(--rad-inner);
  background: linear-gradient(160deg, var(--bg-card-1), var(--bg-card-2));
  padding: 1.25rem;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    inset 0 -1px 0 rgba(0,0,0,0.4),
    0 1px 1px rgba(0,0,0,0.5);
  overflow: hidden;
}

/* Subtle radial highlight inside card */
.card-inner::before {
  content: ''; position: absolute;
  inset: -1px;
  background: radial-gradient(120% 60% at 50% 0%, rgba(255,255,255,0.05), transparent 60%);
  pointer-events: none;
  border-radius: inherit;
}

.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--ink-2);
  margin-bottom: 0.75rem;
}
.tag-pale-red    { background: var(--pastel-red-bg);    color: var(--pastel-red-tx); }
.tag-pale-blue   { background: var(--pastel-blue-bg);   color: var(--pastel-blue-tx); }
.tag-pale-green  { background: var(--pastel-green-bg);  color: var(--pastel-green-tx); }
.tag-pale-yellow { background: var(--pastel-yellow-bg); color: var(--pastel-yellow-tx); }

.card-icon {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  color: var(--ink-1);
  margin-bottom: 0.75rem;
  border: 1px solid var(--line-faint);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 0.25rem;
  letter-spacing: -0.01em;
  color: var(--ink-1);
}
.card-title-lg {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  color: var(--ink-1);
}
.card-desc {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-3);
  line-height: 1.5;
}
.card-arrow {
  position: absolute;
  top: 1rem; right: 1rem;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  color: var(--ink-1);
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base);
}
.card:hover .card-arrow,
.card:focus-within .card-arrow {
  background: rgba(255,255,255,0.1);
}
.card-action-primary:hover .card-arrow,
.card-action-primary:focus-within .card-arrow { transform: translate(2px, -2px); }

.card-action {
  width: 100%; text-align: left;
  display: block;
}
.card-action-primary .card-inner {
  background: linear-gradient(160deg, #18181c, #20201f);
}
.card-action-primary .card-icon { background: rgba(245, 222, 179, 0.1); color: var(--accent-2); }

/* Insight card */
.card-insight .card-inner {
  background: linear-gradient(160deg, #1a1812, #14140e);
}
.insight-row { display: flex; gap: 1rem; }
.insight-meta { flex: 1; }
.insight-h {
  margin: 0.5rem 0 0.25rem;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.insight-p {
  margin: 0 0 1rem;
  color: var(--ink-2);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* ============================================================
   Buttons
   ============================================================ */
.ghost-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 0.9rem 0.55rem 1rem;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line-soft);
  font-size: 0.85rem; font-weight: 500;
  color: var(--ink-1);
  transition: background var(--dur-quick), transform var(--dur-quick);
}
.ghost-btn:hover { background: rgba(255,255,255,0.09); }
.ghost-btn:active { transform: scale(0.97); }
.ghost-btn-sm { padding: 0.4rem 0.7rem; font-size: 0.8rem; }
.ghost-arrow {
  display: inline-block;
  transition: transform var(--dur-base) var(--ease-spring);
}
.ghost-btn:hover .ghost-arrow { transform: translate(2px, -2px); }

.link-btn {
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3);
  padding: 0.5rem 0.25rem;
  transition: color var(--dur-quick);
}
.link-btn:hover { color: var(--ink-1); }

/* ============================================================
   Conversation
   ============================================================ */
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 2rem 0.5rem 0.75rem;
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.35rem;
  margin: 0;
  letter-spacing: -0.015em;
  color: var(--ink-1);
}

.conversation {
  display: flex; flex-direction: column; gap: 0.75rem;
  padding: 0 0.5rem;
}
.msg { display: flex; max-width: 90%; }
.msg-agent { align-self: flex-start; }
.msg-user  { align-self: flex-end; }
.msg-bubble {
  padding: 0.85rem 1rem;
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.5;
}
.msg-agent .msg-bubble {
  background: var(--bg-card-2);
  border: 1px solid var(--line-faint);
  border-bottom-left-radius: 6px;
  color: var(--ink-1);
}
.msg-user .msg-bubble {
  background: linear-gradient(160deg, #f5f5f4, #e8e6df);
  color: #1a1a18;
  border-bottom-right-radius: 6px;
}
.msg-bubble strong { font-weight: 600; }

/* ============================================================
   Balance card
   ============================================================ */
.balance-amount {
  display: flex; align-items: baseline; gap: 0.4rem;
  margin: 0.5rem 0 1rem;
}
.balance-num {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
}
.balance-currency {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--ink-3);
}
.balance-delta {
  display: flex; align-items: center; gap: 0.5rem;
  margin-top: 1rem;
}
.delta-pill {
  display: inline-flex; align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.delta-up { background: rgba(95, 194, 138, 0.15); color: var(--in); }
.delta-down { background: rgba(224, 116, 136, 0.15); color: var(--out); }
.delta-label { font-size: 0.8rem; color: var(--ink-3); }

.mini-amount {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
  margin-top: 0.25rem;
}
.mini-amount small {
  font-family: var(--font-mono);
  font-size: 0.7em;
  color: var(--ink-3);
  margin-left: 0.15rem;
}

/* ============================================================
   Chips
   ============================================================ */
.chip-row {
  display: flex; gap: 0.5rem;
  padding: 0.75rem 0.25rem 0.25rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
}
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-2);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-faint);
  white-space: nowrap;
  scroll-snap-align: start;
  transition: all var(--dur-quick) var(--ease-out);
}
.chip:hover { color: var(--ink-1); background: rgba(255,255,255,0.07); }
.chip-active {
  background: var(--ink-1);
  color: var(--bg-canvas);
  border-color: transparent;
}

/* ============================================================
   Transactions
   ============================================================ */
.tx-list { display: flex; flex-direction: column; margin: 1rem 0; }
.tx {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.85rem 0.25rem;
  border-bottom: 1px solid var(--line-faint);
}
.tx:last-child { border-bottom: none; }
.tx-avatar {
  width: 40px; height: 40px;
  flex-shrink: 0;
  border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-faint);
  color: var(--ink-2);
}
.tx-av-marketing { color: #f0d28a; background: rgba(240, 210, 138, 0.08); }
.tx-av-client    { color: #b9e3c5; background: rgba(185, 227, 197, 0.08); }
.tx-av-salary    { color: #aed1ee; background: rgba(174, 209, 238, 0.08); }
.tx-av-software  { color: #d4b6ee; background: rgba(212, 182, 238, 0.08); }

.tx-body { flex: 1; min-width: 0; }
.tx-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tx-meta {
  display: flex; align-items: center; gap: 0.4rem;
  margin-top: 0.15rem;
  font-size: 0.78rem;
  color: var(--ink-3);
}
.dot-sep {
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--ink-5);
}
.tx-amount {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tx-in  { color: var(--in); }
.tx-out { color: var(--ink-2); }

/* ============================================================
   Reports
   ============================================================ */
.report-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1rem 0 1.25rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line-faint);
  border-bottom: 1px solid var(--line-faint);
}
.rs-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  margin-bottom: 0.25rem;
}
.rs-val {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
}
.rs-accent { color: var(--accent-2); }

.tax-amount {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1;
  margin: 0.5rem 0 0.5rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.tax-amount small {
  font-family: var(--font-mono);
  font-size: 0.6em;
  color: var(--ink-3);
}

/* ============================================================
   Settings
   ============================================================ */
.settings-group {
  margin: 1.25rem 0 1.5rem;
  background: var(--bg-card-1);
  border: 1px solid var(--line-faint);
  border-radius: var(--rad-shell);
  overflow: hidden;
}
.settings-title {
  padding: 1rem 1.25rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--ink-3);
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.95rem 1.25rem;
  border-top: 1px solid var(--line-faint);
  font-size: 0.95rem;
  color: var(--ink-1);
  min-height: 56px;
}
.settings-val {
  color: var(--ink-2);
  font-size: 0.9rem;
}
.settings-val-actions { display: flex; gap: 0.25rem; }

.seg-toggle {
  display: inline-flex;
  padding: 3px;
  background: rgba(255,255,255,0.05);
  border-radius: 999px;
  gap: 2px;
}
.seg-toggle button {
  font-size: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: var(--ink-2);
}
.seg-toggle .seg-active {
  background: var(--ink-1);
  color: var(--bg-canvas);
}

.switch {
  width: 44px; height: 26px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--line-faint);
  position: relative;
  transition: background var(--dur-quick), border-color var(--dur-quick);
}
.switch span {
  position: absolute;
  top: 50%; left: 3px;
  width: 18px; height: 18px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--ink-2);
  transition: transform var(--dur-quick) var(--ease-spring), background var(--dur-quick);
}
.switch-on {
  background: var(--accent-2);
  border-color: transparent;
}
.switch-on span { background: #1a1a18; transform: translate(16px, -50%); }

.settings-foot {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-4);
  margin: 2rem 0 0;
  letter-spacing: 0.06em;
}

/* ============================================================
   Composer (FAB + input pill)
   ============================================================ */
.composer {
  position: fixed;
  left: 50%; transform: translateX(-50%);
  bottom: calc(var(--tab-h) + 8px);
  width: calc(100% - 2rem);
  max-width: calc(var(--max-content) - 2rem);
  z-index: 40;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0.6rem;
  align-items: center;
  background: var(--bg-canvas);
  transition: bottom var(--dur-base) var(--ease-out);
}
.composer.shifted { bottom: calc(var(--tab-h) + 80vh); }

.fab {
  position: relative;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f5f5f4, #c8c8c4);
  color: #07070a;
  display: grid; place-items: center;
  box-shadow:
    0 8px 28px rgba(0,0,0,0.5),
    0 2px 8px rgba(255,255,255,0.15),
    inset 0 1px 0 rgba(255,255,255,0.5);
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base);
  flex-shrink: 0;
}
.fab:hover { transform: scale(1.04); }
.fab:active { transform: scale(0.96); }
.fab-pulse {
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent-2);
  opacity: 0.5;
  animation: fabPulse 3.2s ease-out infinite;
}
@keyframes fabPulse {
  0%   { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

.composer-input {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.4rem 0.4rem 1rem;
  background: var(--bg-card-1);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.composer-input input {
  flex: 1;
  font-size: 0.92rem;
  color: var(--ink-1);
  min-width: 0;
}
.composer-input input::placeholder {
  color: var(--ink-4);
}
.send-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--ink-1);
  display: grid; place-items: center;
  transition: background var(--dur-quick), transform var(--dur-quick);
}
.send-btn:hover { background: rgba(255,255,255,0.15); }
.send-btn:active { transform: scale(0.92); }

/* ============================================================
   Tab bar
   ============================================================ */
.tab-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 50;
  max-width: var(--max-content);
  margin: 0 auto;
  height: calc(var(--tab-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: color-mix(in oklab, var(--bg-shell) 88%, transparent);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border-top: 1px solid var(--line-faint);
}
.tab-bar::before {
  content: ''; position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  opacity: 0.4;
}

.tab {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.3rem;
  color: var(--ink-3);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--dur-quick);
  min-height: 44px;
}
.tab svg { transition: transform var(--dur-base) var(--ease-spring); }
.tab:active { transform: scale(0.96); }
.tab:hover  { color: var(--ink-2); }
.tab-active { color: var(--ink-1); }
.tab-active::before {
  content: '';
  position: absolute;
  top: 6px;
  width: 18px; height: 2px;
  background: var(--accent-2);
  border-radius: 999px;
  box-shadow: 0 0 12px var(--accent-2);
}
.tab-active svg { transform: translateY(-2px); }

/* ============================================================
   Toast
   ============================================================ */
.toast {
  position: fixed;
  top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.96);
  padding: 0.85rem 1.25rem;
  background: var(--ink-1);
  color: var(--bg-canvas);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-spring);
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ============================================================
   Entry animations (staggered)
   ============================================================ */
.card, .tx, .settings-row {
  animation: itemIn var(--dur-slow) var(--ease-out) backwards;
}
.card:nth-child(1) { animation-delay: 80ms; }
.card:nth-child(2) { animation-delay: 160ms; }
.card:nth-child(3) { animation-delay: 240ms; }
.card:nth-child(4) { animation-delay: 320ms; }

.tx:nth-child(1) { animation-delay: 60ms; }
.tx:nth-child(2) { animation-delay: 120ms; }
.tx:nth-child(3) { animation-delay: 180ms; }
.tx:nth-child(4) { animation-delay: 240ms; }
.tx:nth-child(5) { animation-delay: 300ms; }
.tx:nth-child(6) { animation-delay: 360ms; }

@keyframes itemIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .ambient-orb { display: none; }
}

/* ============================================================
   Safe-area adjustment for very small screens
   ============================================================ */
@media (max-height: 600px) {
  .hero { padding-top: 1rem; padding-bottom: 0.5rem; }
  .hero-title { font-size: 2rem; }
}