/* Хроно — база: сброс, типографика, аврора-фон, кнопки, поля, стекло, состояния. */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh; background: var(--bg); color: var(--ink);
  font: 400 16px/1.55 var(--font-body); font-feature-settings: 'ss01', 'cv11'; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: color-mix(in srgb, var(--accent-b) 40%, transparent); color: var(--ink); }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

:focus-visible { outline: 2px solid var(--accent-b); outline-offset: 2px; border-radius: 6px; }
html[data-theme='light'] :focus-visible { outline-color: #1D6FE0; }

/* ---------- аврора-фон и зерно ---------- */
.aurora { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; background: var(--bg); }
.aurora i { position: absolute; width: 64vmax; height: 64vmax; border-radius: 50%; opacity: calc(.42 * var(--aurora-op)); will-change: transform; animation: aurora-drift 40s ease-in-out infinite alternate; }
.aurora i:nth-child(1) { background: radial-gradient(circle, var(--accent-a), transparent 64%); left: -22vmax; top: -30vmax; }
.aurora i:nth-child(2) { background: radial-gradient(circle, var(--accent-b), transparent 64%); right: -28vmax; top: -4vmax; animation-duration: 52s; animation-delay: -14s; }
.aurora i:nth-child(3) { background: radial-gradient(circle, var(--accent-c), transparent 64%); left: 14vmax; bottom: -42vmax; animation-duration: 60s; animation-delay: -26s; }
@keyframes aurora-drift { to { transform: translate3d(7vmax, 5vmax, 0) scale(1.14); } }
body::after {
  content: ''; position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: var(--grain-op);
  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='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- типографика ---------- */
.display { font-family: var(--font-display); font-weight: 400; letter-spacing: -.035em; line-height: 1.02; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-2); }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- стекло ---------- */
.glass {
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--r-3); box-shadow: var(--shadow-md);
  -webkit-backdrop-filter: blur(22px) saturate(150%); backdrop-filter: blur(22px) saturate(150%);
  position: relative;
}
.glass-edge::before { /* тонкая градиентная граница */
  content: ''; position: absolute; inset: 0; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(150deg, rgba(255, 255, 255, .22), rgba(255, 255, 255, 0) 35%, color-mix(in srgb, var(--accent-b) 28%, transparent) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
}
html[data-theme='light'] .glass-edge::before { background: linear-gradient(150deg, rgba(255, 255, 255, .9), rgba(255, 255, 255, 0) 40%, rgba(16, 20, 43, .1) 100%); }

/* ---------- кнопки ---------- */
.btn {
  --h: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: var(--h); padding: 0 20px;
  border: 1px solid transparent; border-radius: 14px; font-weight: 550; font-size: 15px; letter-spacing: -.005em; line-height: 1;
  background: none; white-space: nowrap; position: relative; isolation: isolate; user-select: none; -webkit-tap-highlight-color: transparent;
  transition: transform var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out), background-color var(--dur-1), border-color var(--dur-1), opacity var(--dur-1);
}
.btn:active { transform: scale(.975); }
.btn[disabled], .btn[aria-disabled='true'] { opacity: .5; pointer-events: none; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--grad); color: var(--on-accent); box-shadow: 0 10px 30px -12px color-mix(in srgb, var(--accent-b) 80%, transparent), inset 0 1px 0 rgba(255, 255, 255, .45); font-weight: 600; }
.btn-primary:hover { box-shadow: 0 14px 38px -10px color-mix(in srgb, var(--accent-b) 90%, transparent), inset 0 1px 0 rgba(255, 255, 255, .55); filter: saturate(1.08) brightness(1.04); }
.btn-ghost { border-color: var(--line-2); background: var(--glass-2); }
.btn-ghost:hover { background: var(--hover); border-color: color-mix(in srgb, var(--ink) 30%, transparent); }
.btn-quiet { color: var(--ink-2); }
.btn-quiet:hover { background: var(--hover); color: var(--ink); }
.btn-danger { border-color: color-mix(in srgb, #FF4D6D 55%, transparent); color: #FF8FA3; background: color-mix(in srgb, #FF4D6D 10%, transparent); }
html[data-theme='light'] .btn-danger { color: #B3163A; }
.btn-danger:hover { background: color-mix(in srgb, #FF4D6D 20%, transparent); }
.btn-sm { --h: 38px; padding: 0 14px; font-size: 14px; border-radius: 12px; }
.btn-lg { --h: 56px; padding: 0 28px; font-size: 16px; border-radius: 16px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; border: 1px solid transparent; background: none; color: var(--ink-2);
  transition: background-color var(--dur-1), color var(--dur-1), transform var(--dur-2) var(--ease-out); position: relative; -webkit-tap-highlight-color: transparent;
}
.icon-btn::after { content: ''; position: absolute; inset: -4px; } /* расширенная зона нажатия */
.icon-btn:hover { background: var(--hover); color: var(--ink); }
.icon-btn:active { transform: scale(.92); }
.icon-btn svg { width: 20px; height: 20px; }
@media (pointer: coarse), (max-width: 900px) {
  .icon-btn { width: var(--hit); height: var(--hit); }
  .btn-sm { --h: 44px; }
}

/* ---------- поля ---------- */
.field { display: grid; gap: 7px; }
.field > label, .field > .label { font-size: 13px; font-weight: 500; color: var(--ink-2); }
.input, .select, .textarea {
  width: 100%; min-height: 46px; padding: 11px 14px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--glass-2); color: var(--ink);
  transition: border-color var(--dur-1), background-color var(--dur-1), box-shadow var(--dur-2); font-size: 16px; /* 16px — iOS не масштабирует страницу при фокусе */
}
.textarea { resize: vertical; min-height: 84px; line-height: 1.45; }
.input::placeholder, .textarea::placeholder { color: var(--ink-3); }
.input:hover, .select:hover, .textarea:hover { border-color: color-mix(in srgb, var(--ink) 32%, transparent); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--accent-b); background: color-mix(in srgb, var(--accent-b) 7%, transparent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-b) 25%, transparent); }
.input[aria-invalid='true'] { border-color: #FF4D6D; box-shadow: 0 0 0 3px color-mix(in srgb, #FF4D6D 22%, transparent); }
.select { appearance: none; -webkit-appearance: none; padding-right: 38px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23A9B0CE' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; }
.select option { background: var(--surface); color: var(--ink); }
.form-error { color: #FF8FA3; font-size: 14px; min-height: 1.4em; }
html[data-theme='light'] .form-error { color: #B3163A; }
input[type='date'], input[type='time'] { color-scheme: inherit; font-family: var(--font-mono); font-size: 15px; }
input[type='checkbox'], input[type='radio'] { accent-color: var(--accent-b); width: 18px; height: 18px; }

/* ---------- переключатель темы (круговое раскрытие через View Transitions) ---------- */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 2; }
.theme-toggle { overflow: hidden; }
.theme-toggle svg { transition: transform var(--dur-3) var(--ease-out), opacity var(--dur-2); position: absolute; }
html[data-theme='dark'] .theme-toggle .i-sun { transform: translateY(24px) rotate(-70deg); opacity: 0; }
html[data-theme='light'] .theme-toggle .i-moon { transform: translateY(-24px) rotate(70deg); opacity: 0; }

/* ---------- скелетоны, спиннер ---------- */
.skeleton { position: relative; overflow: hidden; background: var(--glass-2); border-radius: 10px; }
.skeleton::after { content: ''; position: absolute; inset: 0; transform: translateX(-100%); background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink) 9%, transparent), transparent); animation: shimmer 1.4s infinite; }
@keyframes shimmer { to { transform: translateX(100%); } }
.spinner { width: 22px; height: 22px; border-radius: 50%; border: 2.5px solid color-mix(in srgb, var(--ink) 18%, transparent); border-top-color: var(--accent-b); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- прочее ---------- */
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 11px; border-radius: 999px; font-size: 12.5px; font-weight: 500; border: 1px solid var(--line-2); background: var(--glass-2); color: var(--ink-2); }
.demo-flag { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; color: #FFD27A; background: color-mix(in srgb, #FFB020 14%, transparent); border: 1px solid color-mix(in srgb, #FFB020 40%, transparent); }
html[data-theme='light'] .demo-flag { color: #8A5A00; }
.wordmark { display: inline-flex; align-items: center; gap: 11px; min-height: 44px; font-family: var(--font-display); font-weight: 500; font-size: 21px; letter-spacing: -.04em; }
.wordmark .logo { width: 30px; height: 30px; }
.logo-hand { transform-box: view-box; transform-origin: 16px 16px; animation: tick 60s steps(60) infinite; }
@keyframes tick { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .aurora i { animation: none; }
}