/* ===========================================================
   КСТ — единая дизайн-система: светлая + тёмная темы, адаптив
   =========================================================== */

:root {
  /* === Светлая тема (по умолчанию) === */
  --color-bg:           #ffffff;
  --color-surface:      #fafafa;
  --color-surface-2:    #f4f5f7;
  --color-fg:           #0f1115;
  --color-fg-muted:     #5b6068;
  --color-fg-soft:      #8a9099;
  --color-border:       #e6e8ec;
  --color-border-strong:#cfd3da;
  --color-accent:       #111418;
  --color-accent-hover: #2a2f37;
  --color-accent-fg:    #ffffff;
  --color-danger:       #b42318;
  --color-danger-bg:    #fef3f2;
  --color-danger-border:#fecdca;
  --color-success:      #117a4b;
  --color-success-bg:   #ecfdf5;
  --color-success-border:#a7f3d0;
  --color-warning:      #b54708;
  --color-info-bg:      #eef6ff;
  --color-info-border:  #bfdbfe;
  --shadow-soft:        0 1px 3px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06);
  --shadow-focus:       0 0 0 3px rgba(17, 20, 24, 0.08);
  --logo-bg:            transparent;
  --pdf-bg:             #ededef;

  /* Типографика */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
               "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 16px;
  --text-lg:   18px;
  --text-xl:   22px;
  --text-2xl:  28px;
  --text-3xl:  36px;
  --text-4xl:  48px;

  /* 8px grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  --max-w-content: 1080px;
  --max-w-prose: 680px;
}

/* === Тёмная тема === */
[data-theme="dark"] {
  --color-bg:           #0d1117;
  --color-surface:      #161b22;
  --color-surface-2:    #1c2128;
  --color-fg:           #e6edf3;
  --color-fg-muted:     #9da7b3;
  --color-fg-soft:      #6e7681;
  --color-border:       #30363d;
  --color-border-strong:#484f58;
  --color-accent:       #f0f3f6;
  --color-accent-hover: #ffffff;
  --color-accent-fg:    #0d1117;
  --color-danger:       #f85149;
  --color-danger-bg:    #2a1517;
  --color-danger-border:#5d2227;
  --color-success:      #3fb950;
  --color-success-bg:   #102a1b;
  --color-success-border:#1f4f30;
  --color-warning:      #d29922;
  --color-info-bg:      #0f1e30;
  --color-info-border:  #1e3a5f;
  --shadow-soft:        0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.5);
  --shadow-focus:       0 0 0 3px rgba(240, 243, 246, 0.12);
  --logo-bg:            #f0f3f6;
  --pdf-bg:             #1c2128;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: light dark; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button { font-family: inherit; }
a { color: inherit; }

/* === Layout === */
.container {
  width: 100%;
  max-width: var(--max-w-content);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.container--narrow { max-width: var(--max-w-prose); }

/* === Header === */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  max-width: var(--max-w-content);
  margin: 0 auto;
  gap: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-fg);
  min-width: 0;
}
.brand img {
  height: 36px;
  width: auto;
  background: var(--logo-bg);
  border-radius: 4px;
  padding: 2px;
  transition: background-color 0.2s ease;
}
.brand__name {
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  min-width: 0;
}
.brand__name small {
  display: block;
  color: var(--color-fg-muted);
  font-weight: 400;
  font-size: 11px;
  margin-top: 2px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Theme toggle button */
.theme-toggle {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--color-fg);
  transition: background-color .15s ease, border-color .15s ease;
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--color-surface); border-color: var(--color-border-strong); }
.theme-toggle svg { width: 18px; height: 18px; display: block; }
.theme-toggle .sun  { display: none; }
.theme-toggle .moon { display: block; }
[data-theme="dark"] .theme-toggle .sun  { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }

/* === Hero === */
.hero {
  padding: var(--space-8) 0 var(--space-7);
  border-bottom: 1px solid var(--color-border);
}
.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
  line-height: 1.1;
}
.hero p {
  font-size: var(--text-lg);
  color: var(--color-fg-muted);
  max-width: 560px;
  margin: 0 0 var(--space-5);
}

/* === Sections === */
.section {
  padding: var(--space-7) 0;
}
.section--surface { background: var(--color-surface); }
.section__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
}
.section__sub {
  color: var(--color-fg-muted);
  margin: 0 0 var(--space-6);
  font-size: var(--text-base);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
  color: var(--color-fg);
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-fg);
}
.btn--primary:hover { background: var(--color-accent-hover); }
.btn--primary:disabled {
  background: var(--color-border-strong);
  cursor: not-allowed;
}
.btn--ghost {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-border);
}
.btn--ghost:hover { background: var(--color-surface); border-color: var(--color-border-strong); }
.btn--ghost:disabled { opacity: 0.4; cursor: not-allowed; }
.btn--danger {
  background: transparent;
  color: var(--color-danger);
  border-color: var(--color-border);
}
.btn--danger:hover { background: var(--color-danger-bg); border-color: var(--color-danger); }
.btn--lg { padding: 14px 24px; font-size: var(--text-base); }
.btn--block { width: 100%; }

/* === Forms === */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.field label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-fg);
}
.field .hint {
  font-size: var(--text-xs);
  color: var(--color-fg-soft);
}
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea,
select {
  font-family: inherit;
  font-size: var(--text-base);
  padding: 10px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-fg);
  width: 100%;
  transition: border-color .15s ease, box-shadow .15s ease;
}
input::placeholder, textarea::placeholder { color: var(--color-fg-soft); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}
textarea { min-height: 100px; resize: vertical; }

input[type="file"] {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  padding: var(--space-2) 0;
}
input[type="checkbox"] { accent-color: var(--color-accent); }

/* Браузер тёмных схем — нативные элементы (date pickers и т.п.) */
[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator,
[data-theme="dark"] input[type="time"]::-webkit-calendar-picker-indicator,
[data-theme="dark"] input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

.form-row { display: grid; gap: var(--space-4); }
@media (min-width: 600px) {
  .form-row--2 { grid-template-columns: 1fr 1fr; }
  .form-row--3 { grid-template-columns: 1fr 1fr 1fr; }
}

/* === Card === */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.card + .card { margin-top: var(--space-4); }

/* === PDF Viewer === */
.pdf-viewer {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}
.pdf-viewer__canvas-wrap {
  background: var(--pdf-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 520px;
  padding: var(--space-5);
}
.pdf-viewer__canvas-wrap canvas {
  max-width: 100%;
  height: auto;
  background: white;
  box-shadow: var(--shadow-soft);
}
.pdf-viewer__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  gap: var(--space-3);
  flex-wrap: wrap;
}
.pdf-viewer__pageinfo {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  font-variant-numeric: tabular-nums;
}
.pdf-viewer__progress {
  flex: 1;
  height: 3px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  min-width: 120px;
}
.pdf-viewer__progress-bar {
  height: 100%;
  background: var(--color-accent);
  width: 0;
  transition: width .25s ease;
}

.pdf-viewer:fullscreen,
.pdf-viewer:-webkit-full-screen {
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
}
.pdf-viewer:fullscreen .pdf-viewer__canvas-wrap {
  flex: 1;
  min-height: 0;
}

/* === Slots picker === */
.slots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
}
.slot-btn {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-fg);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  cursor: pointer;
  text-align: left;
  transition: border-color .15s, background-color .15s;
  font-variant-numeric: tabular-nums;
}
.slot-btn:hover {
  border-color: var(--color-accent);
  background: var(--color-surface);
}
.slot-btn[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-fg);
}
.slot-btn__date { display: block; font-weight: 500; }
.slot-btn__time { display: block; color: var(--color-fg-muted); margin-top: 2px; font-size: var(--text-xs); }
.slot-btn[aria-pressed="true"] .slot-btn__time { color: var(--color-accent-fg); opacity: .85; }

.day-group { margin-bottom: var(--space-5); }
.day-group__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-3);
}

/* === Status messages === */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  border: 1px solid;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}
.alert--error   { background: var(--color-danger-bg);  color: var(--color-danger);  border-color: var(--color-danger-border); }
.alert--success { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-border); }
.alert--info    { background: var(--color-surface);    color: var(--color-fg-muted); border-color: var(--color-border); }

/* === Tables === */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  min-width: 720px;
}
.table th, .table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.table th {
  font-weight: 600;
  color: var(--color-fg-muted);
  background: var(--color-surface);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.table tbody tr:hover { background: var(--color-surface); }
.table__actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-fg-muted);
}
.badge--booked  { background: var(--color-danger-bg);  color: var(--color-danger);  border-color: var(--color-danger-border); }
.badge--free    { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-border); }
.badge--hidden  { background: var(--color-surface); color: var(--color-fg-soft); }

/* === CMS Blocks === */
.cms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.cms-block {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}
.cms-block__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.cms-block__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.cms-block__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.cms-block__text {
  color: var(--color-fg-muted);
  font-size: var(--text-base);
  line-height: 1.6;
}
.cms-block__text p { margin: 0 0 var(--space-2); }
.cms-block__text p:last-child { margin-bottom: 0; }
.cms-block__text ul { padding-left: 20px; margin: var(--space-2) 0; }
.cms-block__text a { color: var(--color-fg); text-decoration: underline; }
.cms-block__link { margin-top: auto; align-self: flex-start; }

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
  color: var(--color-fg-soft);
  font-size: var(--text-sm);
  margin-top: var(--space-8);
}
.site-footer a { color: var(--color-fg-muted); text-decoration: none; }
.site-footer a:hover { color: var(--color-fg); text-decoration: underline; }

/* === Utilities === */
.stack > * + * { margin-top: var(--space-3); }
.muted { color: var(--color-fg-muted); }
.tabular { font-variant-numeric: tabular-nums; }
.flex { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; }
.flex--between { justify-content: space-between; }
.hide-sm { display: none; }
@media (min-width: 720px) { .hide-sm { display: initial; } }

/* === АДАПТИВ === */

/* Планшет: 768px и больше */
@media (min-width: 768px) {
  .hero h1 { font-size: var(--text-4xl); }
}

/* Маленькие планшеты и большие телефоны: до 767px */
@media (max-width: 767px) {
  .container { padding: 0 var(--space-4); }
  .site-header__inner { padding: var(--space-3) var(--space-4); gap: var(--space-2); }
  .brand { gap: var(--space-2); flex: 1; min-width: 0; }
  .brand img { height: 30px; flex-shrink: 0; }
  .brand__name { font-size: var(--text-xs); overflow: hidden; }
  .brand__name small {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 10px;
  }
  .hero { padding: var(--space-6) 0 var(--space-5); }
  .hero h1 { font-size: var(--text-2xl); }
  .hero p { font-size: var(--text-base); }
  .section { padding: var(--space-6) 0; }
  .section__title { font-size: var(--text-xl); }
  .pdf-viewer__canvas-wrap { min-height: 360px; padding: var(--space-3); }
  .pdf-viewer__controls { gap: var(--space-2); padding: var(--space-2) var(--space-3); }
  .pdf-viewer__controls .btn { padding: 8px 12px; font-size: var(--text-xs); }
  .slots-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .cms-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .site-footer { padding: var(--space-5) 0; margin-top: var(--space-6); }
  .site-footer .flex--between { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
}

/* Маленькие телефоны: до 480px */
@media (max-width: 480px) {
  .site-header__actions { gap: var(--space-1); }
  .site-header__actions .btn:not(.theme-toggle) {
    padding: 8px 12px;
    font-size: var(--text-xs);
  }
  .brand__name small { display: none; }
  .hero h1 { font-size: var(--text-xl); line-height: 1.15; }
  .btn--lg { padding: 12px 18px; font-size: var(--text-sm); }
  .pdf-viewer__canvas-wrap { min-height: 280px; }
  .pdf-viewer__pageinfo { font-size: var(--text-xs); }
  .pdf-viewer__progress { display: none; }
  .theme-toggle { width: 34px; height: 34px; }
}

/* Совсем маленькие (350px и меньше) — экстренно сокращаем CTA в шапке */
@media (max-width: 380px) {
  .site-header__actions .btn:not(.theme-toggle) {
    max-width: 130px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* Печать */
@media print {
  .site-header, .site-footer, .pdf-viewer__controls, .btn { display: none; }
  body { color: black; background: white; }
}

/* Уменьшение анимаций для людей с motion sickness */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}