/* ══════════════════════════════════════════════════════════════
   Design tokens — Bvlgari Omnia Amethyste
   Palette: deep violet-black bg, amethyst purple accents,
            iris blue + rose pink highlights
══════════════════════════════════════════════════════════════ */
:root {
  /* Background & Surface */
  --c-bg:           #080610;
  --c-surface:      #100e1c;
  --c-surface-2:    #18152a;
  --c-border:       #2d2548;
  --c-border-focus: #9b6fc7;

  /* Amethyst Palette */
  --c-amethyst-hi:  #e8d0ff;
  --c-amethyst:     #9b6fc7;
  --c-amethyst-lo:  #5c3a8a;
  --c-amethyst-glow:rgba(155,111,199,0.18);

  /* Accent Colors */
  --c-rose:         #d4a0b8;
  --c-iris:         #a0b0e0;
  --c-grapefruit:   #f0c0a0;

  /* Text */
  --c-text:         #ede0ff;
  --c-text-soft:    #9080b0;
  --c-text-muted:   #4a3870;

  /* Status */
  --c-ok:   #5a9a7a;
  --c-err:  #c05060;
  --c-info: #6a88b8;

  /* Typography */
  --f-serif:  'Playfair Display', Georgia, serif;
  --f-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --f-cinzel: 'Cinzel', serif;

  /* Spacing (4-pt grid) */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.25rem;
  --s-6: 1.5rem;
  --s-8: 2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-2xl: 32px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
}

[data-theme="crystalline"] {
  /* Background & Surface */
  --c-bg:           #080b12;
  --c-surface:      #121620;
  --c-surface-2:    #1c2230;
  --c-border:       #323d54;
  --c-border-focus: #a8c1e6;

  /* Crystal Palette (overriding amethyst vars) */
  --c-amethyst-hi:  #ffffff;
  --c-amethyst:     #a8c1e6;
  --c-amethyst-lo:  #4f6b99;
  --c-amethyst-glow:rgba(168,193,230,0.18);

  /* Accent Colors */
  --c-rose:         #b8d8cc; /* bamboo subtle green */
  --c-iris:         #e0e6eb; /* pure white/silver */
  --c-grapefruit:   #ece5cc; /* nashi pear light gold */

  /* Text */
  --c-text:         #f2f7fc;
  --c-text-soft:    #94a6bd;
  --c-text-muted:   #495b73;
}

/* ══════════════════════════════════════════════════════════════
   Reset
══════════════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }

/* ══════════════════════════════════════════════════════════════
   Base — deep violet-black background
══════════════════════════════════════════════════════════════ */
body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% -10%, rgba(155,111,199,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(92,58,138,0.10) 0%, transparent 60%);
  color: var(--c-text);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-8) var(--s-4);
  overflow-x: hidden;
}

/* ══════════════════════════════════════════════════════════════
   Ambient Particles
══════════════════════════════════════════════════════════════ */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--c-amethyst);
  opacity: 0;
  animation: floatUp var(--dur) ease-in-out infinite;
}

.particle:nth-child(1) { width: 4px; height: 4px; left: 15%; --dur: 8s; animation-delay: 0s; }
.particle:nth-child(2) { width: 3px; height: 3px; left: 35%; --dur: 11s; animation-delay: 2s; opacity-max: 0.3; }
.particle:nth-child(3) { width: 5px; height: 5px; left: 55%; --dur: 9s; animation-delay: 4s; background: var(--c-rose); }
.particle:nth-child(4) { width: 3px; height: 3px; left: 70%; --dur: 13s; animation-delay: 1s; background: var(--c-iris); }
.particle:nth-child(5) { width: 4px; height: 4px; left: 85%; --dur: 10s; animation-delay: 3s; }
.particle:nth-child(6) { width: 2px; height: 2px; left: 45%; --dur: 7s; animation-delay: 5s; background: var(--c-amethyst-hi); }

@keyframes floatUp {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: 0.4; }
  90%  { opacity: 0.2; }
  100% { transform: translateY(-20px) scale(1); opacity: 0; }
}

/* ══════════════════════════════════════════════════════════════
   Layout
══════════════════════════════════════════════════════════════ */
.layout {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
}

/* ══════════════════════════════════════════════════════════════
   Brand / Header
══════════════════════════════════════════════════════════════ */
.brand {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
}

.brand__eyebrow {
  font-family: var(--f-sans);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--c-amethyst);
  border: 1px solid color-mix(in srgb, var(--c-amethyst) 30%, transparent);
  padding: var(--s-1) var(--s-4);
  border-radius: 999px;
  background: color-mix(in srgb, var(--c-amethyst) 8%, transparent);
}

.brand__name {
  font-family: var(--f-cinzel);
  font-size: clamp(3rem, 7vw, 3.5rem);
  font-weight: 600;
  line-height: 1;
  background: linear-gradient(150deg, var(--c-amethyst-hi) 0%, var(--c-amethyst) 50%, var(--c-amethyst-lo) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 20px rgba(155,111,199,0.4));
}

.brand__sub {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--c-rose);
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* ══════════════════════════════════════════════════════════════
   Collection Tabs
══════════════════════════════════════════════════════════════ */
.collection-tabs {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  background: color-mix(in srgb, var(--c-surface-2) 60%, transparent);
  border: 1px solid var(--c-border);
  padding: var(--s-1);
  border-radius: 999px;
  margin-top: var(--s-4);
  backdrop-filter: blur(8px);
}

.tab-btn {
  font-family: var(--f-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--c-text-soft);
  background: transparent;
  border: none;
  padding: var(--s-2) var(--s-4);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
  outline: none;
}

.tab-btn:hover {
  color: var(--c-text);
}

.tab-btn.active {
  background: var(--c-amethyst);
  color: var(--c-bg);
  box-shadow: 0 2px 10px var(--c-amethyst-glow);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--c-border-focus);
}

/* ══════════════════════════════════════════════════════════════
   Fragrance Notes Section
══════════════════════════════════════════════════════════════ */
.fragrance-notes {
  background: color-mix(in srgb, var(--c-amethyst) 6%, var(--c-surface));
  border: 1px solid color-mix(in srgb, var(--c-amethyst) 20%, transparent);
  border-radius: var(--r-xl);
  padding: var(--s-5) var(--s-6);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  backdrop-filter: blur(8px);
}

.notes__label {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-amethyst);
  text-align: center;
}

.notes__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
}

.notes__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-1);
  padding: var(--s-3) var(--s-2);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: all var(--dur-base) var(--ease-out);
}

.notes__item--top {
  border-color: color-mix(in srgb, var(--c-grapefruit) 20%, transparent);
  background: color-mix(in srgb, var(--c-grapefruit) 5%, transparent);
}
.notes__item--heart {
  border-color: color-mix(in srgb, var(--c-rose) 20%, transparent);
  background: color-mix(in srgb, var(--c-rose) 5%, transparent);
}
.notes__item--base {
  border-color: color-mix(in srgb, var(--c-iris) 20%, transparent);
  background: color-mix(in srgb, var(--c-iris) 5%, transparent);
}

.notes__icon { font-size: 1.25rem; }

.notes__tier {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-soft);
}

.notes__desc {
  font-size: 0.72rem;
  color: var(--c-text);
  text-align: center;
  line-height: 1.4;
}

/* ══════════════════════════════════════════════════════════════
   Card
══════════════════════════════════════════════════════════════ */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: var(--s-8);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  box-shadow:
    0 1px 0 rgba(255,255,255,.03) inset,
    0 0 0 1px rgba(155,111,199,0.06) inset,
    0 20px 60px rgba(0,0,0,.60),
    0 0 40px rgba(155,111,199,0.05);
  backdrop-filter: blur(10px);
}

.card__intro-text {
  font-size: 0.8125rem;
  color: var(--c-text-soft);
  text-align: center;
  line-height: 1.6;
}

.card__intro-text strong {
  color: var(--c-amethyst-hi);
  font-weight: 600;
}

/* ══════════════════════════════════════════════════════════════
   Output states
══════════════════════════════════════════════════════════════ */
.output {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  min-height: 130px;
  padding: var(--s-6);
  position: relative;
  transition: border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}

.output[data-state="result"] {
  border-color: color-mix(in srgb, var(--c-amethyst) 30%, transparent);
  box-shadow: 0 0 20px rgba(155,111,199,0.12);
}

.output__empty,
.output__loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  color: var(--c-text-muted);
  font-size: 0.84rem;
  pointer-events: none;
  transition: opacity var(--dur-fast);
}

.output__icon { opacity: 0.4; color: var(--c-amethyst); }
.output__empty strong { color: var(--c-text-soft); font-weight: 500; }

/* Amethyst spinner */
.spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--c-border);
  border-top-color: var(--c-amethyst);
  border-right-color: var(--c-rose);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.output__text {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-text);
  word-break: break-word;
}

/* State visibility */
.output[data-state="empty"]   .output__empty   { opacity: 1; }
.output[data-state="empty"]   .output__loading { opacity: 0; }
.output[data-state="empty"]   .output__text    { visibility: hidden; }

.output[data-state="loading"] .output__empty   { opacity: 0; }
.output[data-state="loading"] .output__loading { opacity: 1; }
.output[data-state="loading"] .output__text    { visibility: hidden; }

.output[data-state="result"]  .output__empty   { opacity: 0; pointer-events: none; }
.output[data-state="result"]  .output__loading { opacity: 0; pointer-events: none; }
.output[data-state="result"]  .output__text    { visibility: visible; }

/* ══════════════════════════════════════════════════════════════
   Buttons
══════════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-family: var(--f-sans);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast),
    transform var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast),
    box-shadow var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--c-border-focus);
  outline-offset: 3px;
}

.btn:active:not(:disabled) { transform: scale(0.975); }

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary — amethyst gradient fill */
.btn--primary {
  width: 100%;
  padding: 0.9rem 1.5rem;
  font-size: 0.9375rem;
  background: linear-gradient(135deg, var(--c-amethyst) 0%, var(--c-amethyst-lo) 100%);
  color: #f0e8ff;
  border-color: transparent;
  box-shadow: 0 2px 16px rgba(155,111,199,0.30);
}

.btn--primary:hover:not(:disabled) {
  /* user requested purple on hover for crystalline too */
  background: linear-gradient(135deg, #b580db 0%, #7045a8 100%);
  box-shadow: 0 4px 28px rgba(155,111,199,0.50);
  transform: translateY(-1px);
}

[data-theme="crystalline"] .btn--primary {
  color: var(--c-bg); /* Darker text for Crystalline's lighter button */
  box-shadow: 0 2px 16px rgba(168,193,230,0.30);
}

[data-theme="crystalline"] .btn--primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #c2d6f0 0%, #607eaa 100%);
  color: var(--c-bg);
  box-shadow: 0 4px 28px rgba(168,193,230,0.50);
  transform: translateY(-1px);
}

/* Outline */
.btn--outline {
  background: transparent;
  border-color: var(--c-border);
  color: var(--c-text-soft);
}

.btn--outline:hover:not(:disabled) {
  border-color: var(--c-amethyst);
  color: var(--c-amethyst-hi);
  background: color-mix(in srgb, var(--c-amethyst) 8%, transparent);
}

/* Ghost */
.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--c-text-soft);
}

.btn--ghost:hover:not(:disabled) {
  background: color-mix(in srgb, white 5%, transparent);
  color: var(--c-text);
}

/* ══════════════════════════════════════════════════════════════
   Actions row — mobile-first stacked layout
══════════════════════════════════════════════════════════════ */
.actions {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

/* Copy — full-width amethyst outline */
.btn--copy {
  width: 100%;
  padding: 0.9rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--c-amethyst) 10%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--c-amethyst) 45%, transparent);
  color: var(--c-amethyst-hi);
  border-radius: var(--r-md);
  box-shadow: 0 0 0 0 rgba(155,111,199,0);
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.btn--copy:hover:not(:disabled),
.btn--copy:focus-visible {
  background: color-mix(in srgb, var(--c-amethyst) 18%, transparent);
  border-color: var(--c-amethyst);
  box-shadow: 0 0 18px rgba(155,111,199,0.30);
}

.btn--copy:active:not(:disabled) {
  transform: scale(0.98);
  box-shadow: 0 0 8px rgba(155,111,199,0.20);
}

/* Hashtag toggle row — looks like a settings row */
.tag-toggle-wrap {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.tag-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-3) var(--s-4);
  background: color-mix(in srgb, white 3%, var(--c-surface-2));
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.tag-toggle-row:hover {
  background: color-mix(in srgb, var(--c-amethyst) 6%, var(--c-surface-2));
}

.tag-toggle-row:has(input:checked) {
  background: color-mix(in srgb, var(--c-amethyst) 8%, var(--c-surface-2));
}

/* Subtle hint text below toggle row */
.tags-hint {
  padding: var(--s-2) var(--s-4);
  font-family: var(--f-sans);
  font-size: 0.65rem;
  line-height: 1.5;
  color: var(--c-text-muted);
  letter-spacing: 0.01em;
  background: color-mix(in srgb, var(--c-surface-2) 80%, transparent);
  border-top: 1px solid color-mix(in srgb, var(--c-border) 50%, transparent);
  word-break: break-word;
}

.tag-toggle-row__text {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.tag-toggle-row__icon {
  font-size: 1rem;
  line-height: 1;
}

.tag-toggle-row__label {
  font-family: var(--f-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-text-soft);
  transition: color var(--dur-fast);
}

.tag-toggle-row:has(input:checked) .tag-toggle-row__label {
  color: var(--c-amethyst-hi);
}

/* iOS-style toggle switch */
.tag-toggle-row__switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 26px;
  flex-shrink: 0;
}

.tag-toggle-row__checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
}

.tag-toggle-row__thumb {
  position: absolute;
  inset: 0;
  background: var(--c-surface-2);
  border: 1.5px solid var(--c-border);
  border-radius: 999px;
  transition:
    background var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}

.tag-toggle-row__thumb::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-text-muted);
  transition:
    transform var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}

.tag-toggle-row__checkbox:checked + .tag-toggle-row__thumb {
  background: color-mix(in srgb, var(--c-amethyst) 25%, var(--c-surface-2));
  border-color: var(--c-amethyst);
}

.tag-toggle-row__checkbox:checked + .tag-toggle-row__thumb::after {
  transform: translateX(18px);
  background: var(--c-amethyst);
  box-shadow: 0 0 8px rgba(155,111,199,0.60);
}

.tag-toggle-row__checkbox:focus-visible + .tag-toggle-row__thumb {
  outline: 2px solid var(--c-border-focus);
  outline-offset: 2px;
}

/* Next / Generate Another — ghost full width */
.btn--next {
  width: 100%;
  padding: 0.7rem 1.5rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  justify-content: center;
  gap: var(--s-2);
}

.btn--next:hover:not(:disabled) {
  color: var(--c-text-soft);
  background: color-mix(in srgb, white 4%, transparent);
}

/* ══════════════════════════════════════════════════════════════
   Footer meta
══════════════════════════════════════════════════════════════ */
.meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--s-2);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}

.meta__dot { color: var(--c-amethyst-lo); }

/* ══════════════════════════════════════════════════════════════
   Toast notifications
══════════════════════════════════════════════════════════════ */
.toast-region {
  position: fixed;
  top: var(--s-5);
  right: var(--s-5);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--s-2);
  z-index: 100;
  pointer-events: none;
  max-width: min(340px, calc(100vw - 2 * var(--s-5)));
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  width: 100%;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  font-family: var(--f-sans);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.45;
  color: var(--c-text);
  pointer-events: auto;
  cursor: default;
  animation: toastSlideIn var(--dur-base) var(--ease-out) both;
  box-shadow: 0 4px 20px rgba(0,0,0,.5);
}

.toast--ok   { background: #142a1f; border-color: #2a5040; }
.toast--err  { background: #241418; border-color: #5c2a2a; }
.toast--info { background: #181428; border-color: #362a5c; }

.toast__indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 0.3em;
}

.toast--ok   .toast__indicator { background: var(--c-ok); }
.toast--err  .toast__indicator { background: var(--c-err); }
.toast--info .toast__indicator { background: var(--c-amethyst); }

.toast__msg { flex: 1; }

.toast.is-leaving {
  animation: toastSlideOut var(--dur-base) var(--ease-out) forwards;
}

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

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

/* ── Hub Back Button ─────────────────────────────────────────── */
.hub-back-btn {
  position: fixed;
  top: max(1.5rem, env(safe-area-inset-top, 1.5rem));
  right: max(1.5rem, env(safe-area-inset-right, 1.5rem));
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: color-mix(in srgb, var(--c-amethyst) 12%, var(--c-surface));
  border: 1px solid color-mix(in srgb, var(--c-amethyst) 25%, transparent);
  border-radius: 30px;
  color: var(--c-text);
  font-family: var(--f-sans);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(155,111,199,0.15);
}

.hub-back-btn:hover {
  background: color-mix(in srgb, var(--c-amethyst) 20%, var(--c-surface));
  color: var(--c-amethyst-hi);
  border-color: var(--c-amethyst);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(155,111,199,0.25);
}

.hub-back-btn:active { transform: translateY(0); }

/* ══════════════════════════════════════════════════════════════
   Tags Section
══════════════════════════════════════════════════════════════ */
.tags-section {
  background: color-mix(in srgb, var(--c-amethyst) 5%, var(--c-surface-2));
  border: 1px solid color-mix(in srgb, var(--c-amethyst) 18%, transparent);
  border-radius: var(--r-lg);
  padding: var(--s-4) var(--s-5);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.tags-section__label {
  font-size: 0.5875rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-amethyst);
  text-align: center;
}

.tags-section__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  justify-content: center;
}

.tag-chip {
  display: inline-block;
  font-family: var(--f-sans);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--c-amethyst-hi);
  background: color-mix(in srgb, var(--c-amethyst) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--c-amethyst) 28%, transparent);
  border-radius: 999px;
  padding: var(--s-1) var(--s-3);
  letter-spacing: 0.01em;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  cursor: default;
  user-select: text;
}

.tag-chip:hover {
  background: color-mix(in srgb, var(--c-amethyst) 20%, transparent);
  border-color: color-mix(in srgb, var(--c-amethyst) 50%, transparent);
  transform: translateY(-1px);
}

.tag-chip--mention {
  color: var(--c-rose);
  background: color-mix(in srgb, var(--c-rose) 10%, transparent);
  border-color: color-mix(in srgb, var(--c-rose) 25%, transparent);
}

.tag-chip--mention:hover {
  background: color-mix(in srgb, var(--c-rose) 18%, transparent);
  border-color: color-mix(in srgb, var(--c-rose) 45%, transparent);
}

/* ══════════════════════════════════════════════════════════════
   Copy Group — Copy button + Tag Toggle side by side
══════════════════════════════════════════════════════════════ */
.copy-group {
  display: flex;
  flex: 1;
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--dur-fast) var(--ease-out);
}

.copy-group:focus-within {
  border-color: var(--c-amethyst);
}

.copy-group__btn {
  flex: 1;
  border: none !important;
  border-radius: 0 !important;
  border-right: 1px solid var(--c-border) !important;
}

.copy-group__btn:hover:not(:disabled) {
  border-right-color: var(--c-amethyst) !important;
}

/* Toggle button (# / With Tags pill inside copy-group) */
.btn--toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-1);
  padding: 0 var(--s-4);
  background: transparent;
  border: none;
  border-radius: 0;
  font-family: var(--f-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-text-soft);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast);
  -webkit-user-select: none;
  user-select: none;
  flex-shrink: 0;
}

.btn--toggle:hover {
  background: color-mix(in srgb, var(--c-amethyst) 8%, transparent);
  color: var(--c-amethyst-hi);
}

.btn--toggle:focus-visible {
  outline: 2px solid var(--c-border-focus);
  outline-offset: -2px;
}

.btn--toggle.is-active {
  background: color-mix(in srgb, var(--c-amethyst) 18%, transparent);
  color: var(--c-amethyst-hi);
}

.btn--toggle.is-active .tag-toggle__icon {
  text-shadow: 0 0 8px rgba(155,111,199,0.8);
}

.tag-toggle__icon {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-amethyst);
  transition: text-shadow var(--dur-fast);
}

.tag-toggle__label {
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

/* ══════════════════════════════════════════════════════════════
   Responsive
══════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  body { padding: var(--s-6) var(--s-4); }

  .card {
    padding: var(--s-6);
    border-radius: var(--r-lg);
  }

  .brand__name { font-size: 3rem; }

  .notes__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--s-2);
  }

  .notes__desc { font-size: 0.65rem; }

  .toast-region {
    top: var(--s-4);
    right: var(--s-4);
    left: var(--s-4);
    max-width: none;
    align-items: stretch;
  }
}

/* ══════════════════════════════════════════════════════════════
   Reduced motion
══════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}