/* ============================================================
   Атрибьют — Дизайн-система v1.0
   Канонический CSS: токены + компонентные классы
   Источник: docs/DESIGN-SYSTEM.md, design/app.css
   ============================================================ */

/* ── Токены ── */
:root {
  /* Brand */
  --color-brand-navy:    #1A3E70;
  --color-brand-white:   #FFFFFF;

  /* Neutrals */
  --color-neutral-50:    #F7F8FA;
  --color-neutral-100:   #EEF0F4;
  --color-neutral-200:   #E1E5EC;
  --color-neutral-400:   #9AA3B2;
  --color-neutral-700:   #3D4A5C;
  --color-neutral-900:   #1A2130;

  /* Accents — directions */
  --color-accent-main:   #EB5E57;
  --color-accent-kids:   #F39EC5;
  --color-accent-dental: #4E949E;
  --color-accent:        var(--color-accent-main);

  /* Semantic */
  --color-success:       #2D8A6E;
  --color-warning:       #E8A020;
  --color-error:         #D94040;
  --color-info:          #3A7EC4;

  /* Fonts */
  --font-heading: 'PT Serif', 'Georgia', serif;
  --font-body:    'PT Sans', 'Arial', sans-serif;
  --font-mono:    'PT Mono', ui-monospace, Menlo, monospace;

  /* Type scale — mobile */
  --m-display: 32px;  --m-h1: 26px;  --m-h2: 22px;  --m-h3: 18px;  --m-h4: 16px;
  --m-body: 15px;     --m-body-sm: 13px;  --m-caption: 12px;  --m-label: 10px;

  /* Type scale — desktop */
  --d-display: 48px;  --d-h1: 36px;  --d-h2: 28px;  --d-h3: 22px;  --d-h4: 18px;
  --d-body-lg: 18px;  --d-body: 16px;  --d-body-sm: 14px;  --d-caption: 12px;  --d-label: 11px;

  /* Spacing (4px grid) */
  --s-4: 4px;   --s-8: 8px;   --s-12: 12px;  --s-16: 16px;
  --s-20: 20px; --s-24: 24px; --s-32: 32px;  --s-48: 48px;  --s-64: 64px;

  /* Radius */
  --r-sm: 4px;   /* buttons, inputs, tags */
  --r-md: 8px;   /* chips, nested blocks */
  --r-lg: 14px;  /* cards */
  --r-xl: 22px;  /* large cards, bottom sheet */
  --r-full: 9999px;

  /* Shadows (navy-based, never black) */
  --shadow-sm:   0 1px 4px rgba(26, 62, 112, 0.06);
  --shadow-md:   0 2px 12px rgba(26, 62, 112, 0.08);
  --shadow-lg:   0 6px 24px rgba(26, 62, 112, 0.14);
  --shadow-hero: 0 8px 24px rgba(26, 62, 112, 0.18);

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-normal: 0.25s ease;
  --t-slow:   0.4s ease;
}

/* ── Brand theming ── */
[data-brand="main"]   { --color-accent: var(--color-accent-main); }
[data-brand="kids"]   { --color-accent: var(--color-accent-kids); }
[data-brand="dental"] { --color-accent: var(--color-accent-dental); }

/* ── Reset & base ── */
*, *::before, *::after { margin: 0; box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body { font-family: var(--font-body); font-size: var(--m-body); line-height: 1.6;
  color: var(--color-neutral-700); background: var(--color-neutral-50); }

/* ── Typography ── */
.h-display { font-family: var(--font-heading); font-weight: 700; font-size: var(--m-display);
  line-height: 1.15; letter-spacing: -0.01em; color: var(--color-neutral-900); }
.h1 { font-family: var(--font-heading); font-weight: 700; font-size: var(--m-h1);
  line-height: 1.2; letter-spacing: -0.01em; color: var(--color-neutral-900); }
.h2 { font-family: var(--font-heading); font-weight: 700; font-size: var(--m-h2);
  line-height: 1.25; letter-spacing: -0.01em; color: var(--color-neutral-900); }
.h3 { font-family: var(--font-heading); font-weight: 700; font-size: var(--m-h3);
  line-height: 1.3; color: var(--color-neutral-900); }
.h4 { font-family: var(--font-body); font-weight: 700; font-size: var(--m-h4);
  line-height: 1.4; color: var(--color-neutral-900); }
.body-lg { font-size: var(--m-body); line-height: 1.6; }
.body    { font-size: var(--m-body); line-height: 1.6; }
.body-sm { font-size: var(--m-body-sm); line-height: 1.5; }
.caption { font-size: var(--m-caption); line-height: 1.4; color: var(--color-neutral-400); }
.label   { font-size: var(--m-label); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; line-height: 1.3; }

@media (min-width: 1024px) {
  .h-display { font-size: var(--d-display); letter-spacing: -0.02em; }
  .h1 { font-size: var(--d-h1); letter-spacing: -0.02em; }
  .h2 { font-size: var(--d-h2); letter-spacing: -0.01em; }
  .h3 { font-size: var(--d-h3); }
  .h4 { font-size: var(--d-h4); }
  .body-lg { font-size: var(--d-body-lg); }
  .body    { font-size: var(--d-body); }
  .body-sm { font-size: var(--d-body-sm); }
  .label   { font-size: var(--d-label); }
}

/* ── Buttons ── */
.btn { font-family: var(--font-body); font-weight: 700; font-size: 13px;
  letter-spacing: 0.06em; text-transform: uppercase; padding: 14px 22px;
  border-radius: var(--r-sm); border: none; cursor: pointer;
  transition: opacity var(--t-fast), transform var(--t-fast), background var(--t-fast), color var(--t-fast);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { background: var(--color-neutral-200); color: var(--color-neutral-400); cursor: not-allowed; }

.btn-secondary { background: transparent; color: var(--color-brand-navy);
  border: 1.5px solid var(--color-brand-navy); padding: 12px 20px; }
.btn-secondary:hover { background: var(--color-brand-navy); color: #fff; }

.btn-ghost { background: var(--color-neutral-100); color: var(--color-neutral-900); }
.btn-ghost:hover { background: var(--color-neutral-200); }

.btn-lg { padding: 16px 24px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-icon { padding: 10px; border-radius: var(--r-full); width: 40px; height: 40px;
  background: var(--color-neutral-100); color: var(--color-neutral-700); }

/* ── Cards ── */
.card { background: #fff; border-radius: var(--r-lg); padding: var(--s-16);
  box-shadow: var(--shadow-sm); }
.card-lg { padding: var(--s-20); border-radius: var(--r-xl); }
.card-hero { background: var(--color-brand-navy); color: #fff; border-radius: 18px;
  padding: var(--s-20); box-shadow: var(--shadow-hero); position: relative; overflow: hidden; }

/* ── Tags ── */
.tag { display: inline-block; font-size: 10px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 3px;
  background: var(--color-neutral-100); color: var(--color-neutral-700); }
.tag-accent  { background: color-mix(in srgb, var(--color-accent) 14%, transparent); color: var(--color-accent); }
.tag-success { background: #E5F4ED; color: var(--color-success); }
.tag-warning { background: #FBF1DC; color: var(--color-warning); }
.tag-error   { background: #FAE4E4; color: var(--color-error); }
.tag-info    { background: #E0EBF7; color: var(--color-info); }

/* ── Inputs ── */
.input { font-family: var(--font-body); font-size: 15px; color: var(--color-neutral-900);
  background: #fff; border: 1.5px solid var(--color-neutral-100); border-radius: var(--r-sm);
  padding: 12px 14px; width: 100%; box-sizing: border-box;
  transition: border-color var(--t-normal); }
.input:focus { outline: none; border-color: var(--color-brand-navy); }
.input::placeholder { color: var(--color-neutral-400); }
.input-error { border-color: var(--color-error); }
.field-label { display: block; font-size: 12px; font-weight: 700; color: var(--color-neutral-700);
  letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 6px; }
.field-hint { font-size: 12px; color: var(--color-neutral-400); margin-top: 5px; }
.field-hint.error { color: var(--color-error); }

/* ── Chips ── */
.chip { padding: 9px 14px; border-radius: var(--r-md);
  border: 1.5px solid var(--color-neutral-100); background: #fff;
  font-size: 13px; font-weight: 700; color: var(--color-neutral-900);
  cursor: pointer; transition: all var(--t-fast); font-family: var(--font-body); }
.chip:hover { border-color: var(--color-neutral-200); }
.chip.selected { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.chip.disabled { color: var(--color-neutral-400); background: var(--color-neutral-50);
  cursor: not-allowed; text-decoration: line-through; }

/* ── Brand pill ── */
.brand-pill { display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 11px 5px 7px; border-radius: var(--r-full);
  background: color-mix(in srgb, var(--color-accent) 14%, transparent);
  color: var(--color-accent); font-size: 11px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase; }
.brand-pill .dot { width: 8px; height: 8px; border-radius: var(--r-full);
  background: var(--color-accent); }

/* ── Avatar ── */
.avatar { border-radius: var(--r-full); display: inline-flex; align-items: center;
  justify-content: center; font-family: var(--font-heading); font-weight: 700;
  color: var(--color-brand-navy); flex-shrink: 0; }
.avatar-main  { background: #FBE2E0; }
.avatar-kids  { background: #FCE7F0; }
.avatar-dental { background: #D9EAEC; }

/* ── Divider ── */
.divider { height: 1px; background: var(--color-neutral-100); }

/* ── Bottom navigation ── */
.bnav { position: absolute; left: 0; right: 0; bottom: 0; z-index: 10;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border-top: 0.5px solid rgba(26,62,112,.12);
  padding: 8px 0 24px; display: flex; flex-direction: row; flex-wrap: nowrap;
  justify-content: center; align-items: stretch; gap: 0; }
.bnav-item { background: none; border: none; padding: 6px 0; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; flex: 1 1 0; min-width: 0;
  color: var(--color-neutral-400); font-family: var(--font-body); font-size: 10px;
  font-weight: 700; letter-spacing: 0.04em; white-space: nowrap; }
.bnav-item.active { color: var(--color-accent); }
.bnav-item svg { width: 22px; height: 22px; flex-shrink: 0; }

/* ── Bottom sheet ── */
.sheet { position: absolute; left: 0; right: 0; bottom: 0; z-index: 30;
  background: #fff; border-radius: 28px 28px 0 0; padding: 12px 16px 28px;
  box-shadow: 0 -8px 32px rgba(26,62,112,.16);
  transform: translateY(0); transition: transform .35s cubic-bezier(.2,.7,.3,1); }
.sheet.hidden { transform: translateY(110%); pointer-events: none; }
.sheet-grab { width: 36px; height: 4px; border-radius: var(--r-full);
  background: var(--color-neutral-200); margin: 0 auto 14px; }

/* ── Toast ── */
.toast { background: var(--color-neutral-900); color: #fff; padding: 14px 16px;
  border-radius: var(--r-md); font-size: 13px; box-shadow: var(--shadow-lg); }

/* ── App bar ── */
.appbar { padding: 16px 16px 12px; display: flex; align-items: center;
  justify-content: space-between; background: var(--color-neutral-50);
  position: sticky; top: 0; z-index: 5; }
.appbar-title { font-family: var(--font-heading); font-size: 20px;
  color: var(--color-neutral-900); font-weight: 700; }
.appbar-back { width: 36px; height: 36px; border-radius: var(--r-full);
  background: rgba(26,62,112,.08); display: flex; align-items: center; justify-content: center;
  border: none; cursor: pointer; color: var(--color-brand-navy); }

/* ── Phone screen ── */
.phone-screen { width: 100%; height: 100%; display: flex; flex-direction: column;
  background: var(--color-neutral-50); position: relative; }
.phone-body { flex: 1; overflow-y: auto; padding-bottom: 84px; }
.phone-body::-webkit-scrollbar { display: none; }
.phone-body { scrollbar-width: none; }

/* ── Utility ── */
.row  { display: flex; align-items: center; gap: 12px; }
.col  { display: flex; flex-direction: column; }
.muted { color: var(--color-neutral-400); }
.text-accent { color: var(--color-accent); }
.text-navy   { color: var(--color-brand-navy); }
.text-center { text-align: center; }
.font-heading { font-family: var(--font-heading); }
.font-mono    { font-family: var(--font-mono); }

/* ── Pulse animation ── */
@keyframes pulse-dot { 0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:.55; transform:scale(1.4); } }
.pulse { animation: pulse-dot 1.8s ease-in-out infinite; }

/* ── Scroll containers ── */
.scroll-y { overflow-y: auto; }
.scroll-x { overflow-x: auto; }
.scroll-x::-webkit-scrollbar, .scroll-y::-webkit-scrollbar { display: none; }
.scroll-x, .scroll-y { scrollbar-width: none; }