/* ============================================================
   OtklikPro Design System — common.css
   Подключается на всех страницах через partials/_head.tpl
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS — CSS Custom Properties
   ============================================================ */

:root {
  /* --- Brand / Primary --- */
  --color-primary:        #4f46e5;
  --color-primary-hover:  #4338ca;
  --color-primary-light:  #6366f1;
  --color-primary-bg:     #ede9fe;
  --color-primary-border: #c7d2fe;
  --color-primary-shadow: rgba(79, 70, 229, 0.25);

  /* --- Accent (gradient endpoint, badge) --- */
  --color-accent:         #7c3aed;
  --color-accent-dark:    #6d28d9;

  /* --- Success --- */
  --color-success:        #22c55e;
  --color-success-hover:  #16a34a;
  --color-success-bg:     #f0fdf4;
  --color-success-border: #86efac;
  --color-success-text:   #166534;
  --color-success-dim:    #14532d;

  /* --- Danger --- */
  --color-danger:         #ef4444;
  --color-danger-hover:   #dc2626;
  --color-danger-bg:      #fef2f2;
  --color-danger-border:  #fca5a5;
  --color-danger-text:    #991b1b;
  --color-danger-dim:     #7f1d1d;

  /* --- Warning --- */
  --color-warning-bg:     #fffbeb;
  --color-warning-border: #fde68a;
  --color-warning-text:   #92400e;
  --color-warning-dim:    #1c1917;

  /* --- Info --- */
  --color-info-bg:        #eff6ff;
  --color-info-border:    #bfdbfe;
  --color-info-text:      #1d4ed8;

  /* --- Neutral / Slate --- */
  --color-text:           #0f172a;   /* основной текст          */
  --color-text-secondary: #475569;   /* подписи, описания       */
  --color-text-muted:     #64748b;   /* второстепенный текст    */
  --color-text-subtle:    #94a3b8;   /* плейсхолдеры, подсказки */
  --color-text-tertiary:  #334155;   /* промежуточный           */
  --color-text-inverse:   #ffffff;   /* текст на тёмном фоне    */

  /* --- Поверхности и фоны --- */
  --color-bg:             #ffffff;
  --color-bg-page:        #ffffff;
  --color-bg-subtle:      #f8fafc;
  --color-bg-muted:       #f1f5f9;
  --color-bg-dark:        #0f172a;   /* footer, инверсные секции */

  /* --- Границы --- */
  --color-border:         #e2e8f0;
  --color-border-strong:  #cbd5e1;
  --color-border-subtle:  #f1f5f9;

  /* --- Типографика --- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-md:   17px;
  --text-lg:   20px;
  --text-xl:   24px;
  --text-2xl:  30px;
  --text-3xl:  38px;
  --text-4xl:  48px;
  --text-5xl:  58px;

  --weight-normal:    400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;
  --weight-extrabold: 800;

  --leading-tight:   1.1;
  --leading-snug:    1.35;
  --leading-base:    1.6;
  --leading-relaxed: 1.75;

  --tracking-tight:  -0.035em;
  --tracking-snug:   -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.05em;
  --tracking-wider:  0.1em;

  /* --- Отступы --- */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* --- Скругления --- */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   18px;
  --radius-2xl:  24px;
  --radius-full: 999px;

  /* --- Тени --- */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 6px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.12);
  --shadow-primary: 0 4px 14px var(--color-primary-shadow);

  /* --- Анимации --- */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* --- Z-index --- */
  --z-base:     1;
  --z-sticky:   100;
  --z-dropdown: 200;
  --z-modal:    300;
  --z-toast:    400;

  /* --- Компоненты: Кнопка --- */
  --btn-height-sm: 32px;
  --btn-height-md: 40px;
  --btn-height-lg: 48px;

  /* --- Компоненты: Поле ввода --- */
  --input-height:       44px;
  --input-padding-x:    14px;
  --input-border-width: 1.5px;
  --input-radius:       var(--radius-md);
  --input-font-size:    var(--text-base);

  /* --- Навигация --- */
  --nav-height: 60px;
}

/* ============================================================
   2. ТЁМНАЯ ТЕМА
   Активируется через data-theme="dark" на <html>
   или автоматически по prefers-color-scheme
   ============================================================ */

/* Явная светлая тема — переопределяет @media (prefers-color-scheme: dark) когда
   пользователь вручную выбрал светлую тему на устройстве с тёмной системной */
[data-theme="light"] {
  color-scheme: light;
  --color-primary:        #4f46e5;
  --color-primary-hover:  #4338ca;
  --color-primary-bg:     #ede9fe;
  --color-primary-border: #c7d2fe;

  --color-text:           #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted:     #64748b;
  --color-text-subtle:    #94a3b8;
  --color-text-tertiary:  #334155;

  --color-bg:             #ffffff;
  --color-bg-page:        #ffffff;
  --color-bg-subtle:      #f8fafc;
  --color-bg-muted:       #f1f5f9;
  --color-bg-dark:        #0f172a;

  --color-border:         #e2e8f0;
  --color-border-strong:  #cbd5e1;
  --color-border-subtle:  #f1f5f9;

  --color-success-bg:     #f0fdf4;
  --color-success-border: #86efac;

  --color-danger-bg:      #fef2f2;
  --color-danger-border:  #fca5a5;

  --color-warning-bg:     #fffbeb;
  --color-warning-border: #fde68a;
  --color-warning-text:   #92400e;

  --shadow-sm: 0 1px 6px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .nav {
  background: rgba(255, 255, 255, 0.88);
}

[data-theme="dark"] {
  color-scheme: dark;
  --color-primary:        #6366f1;
  --color-primary-hover:  #4f46e5;
  --color-primary-bg:     #1e1b4b;
  --color-primary-border: #3730a3;

  --color-text:           #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted:     #64748b;
  --color-text-subtle:    #475569;
  --color-text-tertiary:  #cbd5e1;

  --color-bg:             #0f172a;
  --color-bg-page:        #0f172a;
  --color-bg-subtle:      #1e293b;
  --color-bg-muted:       #334155;
  --color-bg-dark:        #020617;

  --color-border:         #334155;
  --color-border-strong:  #475569;
  --color-border-subtle:  #1e293b;

  --color-success-bg:     #052e16;
  --color-success-border: #166534;
  --color-success-text:   #86efac;
  --color-success-dim:    #4ade80;

  --color-danger-bg:      #450a0a;
  --color-danger-border:  #991b1b;
  --color-danger-text:    #fca5a5;
  --color-danger-dim:     #f87171;

  --color-warning-bg:     #1c1400;
  --color-warning-border: #78350f;
  --color-warning-text:   #fbbf24;
  --color-warning-dim:    #fde68a;

  --color-info-bg:        #0c1a2e;
  --color-info-border:    #1e3a5f;
  --color-info-text:      #93c5fd;

  --shadow-sm: 0 1px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}


/* ============================================================
   3. RESET & BASE
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-base);
  color: var(--color-text);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* ============================================================
   4. ТИПОГРАФИКА
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--weight-extrabold);
  letter-spacing: var(--tracking-snug);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-lg);  font-weight: var(--weight-bold); }
h5 { font-size: var(--text-base); font-weight: var(--weight-bold); }
h6 { font-size: var(--text-sm);  font-weight: var(--weight-bold); }

p {
  margin: 0;
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

strong { font-weight: var(--weight-bold); }
em     { font-style: italic; }

small {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* --- Списки --- */
ul, ol {
  margin: 0;
  padding-left: var(--space-5);
  line-height: var(--leading-relaxed);
}

li + li {
  margin-top: var(--space-1);
}

/* Список без маркеров */
.list-none {
  list-style: none;
  padding-left: 0;
}

/* Чеклист */
.list-check {
  list-style: none;
  padding-left: 0;
}

.list-check li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.list-check li:last-child {
  border-bottom: none;
}

.list-check li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: var(--weight-bold);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================================
   5. LAYOUT — Container, Grid
   ============================================================ */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: 760px;
}

.container--wide {
  max-width: 1280px;
}

/* ============================================================
   6. КНОПКИ
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: var(--btn-height-md);
  padding: 0 var(--space-5);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-base);
  outline: none;
  -webkit-user-select: none;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Sizes */
.btn--xs {
  height: 26px;
  padding: 0 var(--space-2);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn--sm {
  height: var(--btn-height-sm);
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  height: var(--btn-height-lg);
  padding: 0 var(--space-8);
  font-size: var(--text-md);
  border-radius: var(--radius-lg);
}

/* Variants */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px var(--color-primary-shadow);
}

.btn--secondary {
  background: var(--color-bg-muted);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  background: var(--color-border);
  border-color: var(--color-border-strong);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-subtle);
}

.btn--ghost-white {
  background: transparent;
  color: var(--color-text-inverse);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn--ghost-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.65);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary-bg);
}

.btn--success {
  background: var(--color-success-hover);
  color: var(--color-text-inverse);
}

.btn--success:hover {
  background: #15803d;
  transform: translateY(-1px);
}

.btn--danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn--danger:hover {
  background: var(--color-danger-hover);
  transform: translateY(-1px);
}

.btn--link {
  background: none;
  border: none;
  color: var(--color-primary);
  padding: 0;
  height: auto;
  font-weight: var(--weight-medium);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn--link:hover {
  color: var(--color-primary-hover);
}

/* States */
.btn[disabled],
.btn--disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
  color: white;
}

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

/* Full-width */
.btn--block {
  width: 100%;
}

/* Icon-only */
.btn--icon {
  padding: 0;
  width: var(--btn-height-md);
  border-radius: var(--radius-md);
}

.btn--icon.btn--sm {
  width: var(--btn-height-sm);
}

.btn--icon.btn--lg {
  width: var(--btn-height-lg);
}

/* ============================================================
   7. ПОЛЯ ВВОДА
   ============================================================ */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.field__hint {
  font-size: var(--text-sm);
  font-weight: var(--weight-normal);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.field__error {
  font-size: var(--text-sm);
  color: var(--color-danger-text);
  margin-top: var(--space-1);
}

/* Базовый стиль для всех полей ввода */
.field__input,
input[type="text"].field__input,
input[type="email"].field__input,
input[type="password"].field__input,
input[type="url"].field__input,
input[type="number"].field__input,
input[type="search"].field__input,
textarea.field__input,
select.field__input {
  display: block;
  width: 100%;
  height: var(--input-height);
  padding: 0 var(--input-padding-x);
  border: var(--input-border-width) solid var(--color-border);
  border-radius: var(--input-radius);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--input-font-size);
  font-weight: var(--weight-normal);
  line-height: 1.5;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

textarea.field__input {
  height: auto;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  resize: vertical;
  min-height: 80px;
}

select.field__input {
  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='%2364748b' 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 var(--space-3) center;
  padding-right: var(--space-10);
  cursor: pointer;
}

.field__input::placeholder {
  color: var(--color-text-subtle);
}

.field__input:hover {
  border-color: var(--color-border-strong);
}

.field__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.field__input:disabled {
  background-color: var(--color-bg-muted);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Состояния валидации */
.field--error .field__input {
  border-color: var(--color-danger-border);
}

.field--error .field__input:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.field--success .field__input {
  border-color: var(--color-success-border);
}

/* Чекбокс и радио */
.field--check {
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.field--check input[type="checkbox"],
.field--check input[type="radio"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: var(--input-border-width) solid var(--color-border-strong);
  border-radius: 4px;
  background: var(--color-bg);
  cursor: pointer;
  accent-color: var(--color-primary);
  margin: 0;
}

.field--check input[type="radio"] {
  border-radius: var(--radius-full);
}

/* ============================================================
   8. АЛЁРТЫ / УВЕДОМЛЕНИЯ
   ============================================================ */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border);
  font-size: var(--text-base);
  line-height: var(--leading-base);
}

.alert .bi {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}

.alert--danger {
  background: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger-text);
}

.alert--success {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: var(--color-success-text);
}

.alert--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: var(--color-warning-text);
}

.alert--info {
  background: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: var(--color-info-text);
}

/* ============================================================
   9. БЕЙДЖИ / МЕТКИ
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}

.badge--primary {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.badge--primary-solid {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.badge--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

.badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
}

.badge--neutral {
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
}

/* ============================================================
   10. КАРТОЧКИ
   ============================================================ */

.card {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.card--hover:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-border);
}

.card--featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}

.card__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-subtle);
}

.card__body {
  padding: var(--space-5);
}

.card__footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-subtle);
}

/* ============================================================
   11. СТАТУС / ФИДБЕК
   ============================================================ */

.status {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 18px;
  line-height: 1.5;
}

.status--ok    { color: var(--color-success-hover); }
.status--error { color: var(--color-danger-hover);  }
.status--warn  { color: var(--color-warning-text);  }

/* ============================================================
   12. ТАБЫ (компонент переключения)
   ============================================================ */

.tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-bg-muted);
  padding: 4px;
  border-radius: var(--radius-lg);
}

.tab {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 36px;
  padding: 0 var(--space-4);
  border: none;
  border-radius: calc(var(--radius-lg) - 4px);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}

.tab--active {
  background: var(--color-bg);
  color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}

.tab:not(.tab--active):hover {
  color: var(--color-text);
}

/* ============================================================
   13. РАЗДЕЛИТЕЛЬ С ТЕКСТОМ
   ============================================================ */

.divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-subtle);
  font-size: var(--text-sm);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ============================================================
   14. НАВИГАЦИЯ
   ============================================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .nav {
  background: rgba(15, 23, 42, 0.88);
}

.nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--weight-extrabold);
  font-size: 18px;
  color: var(--color-primary);
  letter-spacing: var(--tracking-snug);
  text-decoration: none;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__links a:not(.btn) {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

.nav__links a:not(.btn):hover {
  color: var(--color-primary);
}

.nav__back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-primary);
}

/* ============================================================
   15. ФУТЕР
   ============================================================ */

.footer {
  background: var(--color-bg-dark);
  padding: var(--space-10) 0 var(--space-6);
}

.footer__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--weight-extrabold);
  font-size: 16px;
  color: #ffffff;
  letter-spacing: var(--tracking-snug);
  flex-shrink: 0;
}

.footer__nav {
  display: flex;
  gap: var(--space-12);
}

.footer__nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-1);
}

.footer__nav-group a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: 1.4;
}

.footer__nav-group a:hover {
  color: rgba(255, 255, 255, 0.95);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-5);
}

.footer__copy {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

/* Обратная совместимость — старый .footer__links */
.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: rgba(255, 255, 255, 0.95);
}

/* ============================================================
   15b. ЛОГОТИП — общие компоненты
   ============================================================ */

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 12px;
  flex-shrink: 0;
  line-height: 1;
  transition: background var(--transition-base);
}

.logo-badge--sm {
  width: 19px;
  height: 19px;
  font-size: 10px;
  border-radius: 4px;
}

/* ============================================================
   16. УТИЛИТЫ
   ============================================================ */

/* Отображение */
.hidden     { display: none !important; }
.is-hidden  { display: none !important; }
.invisible  { visibility: hidden; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Текст */
.text-left    { text-align: left; }
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.text-muted   { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success-hover); }
.text-danger  { color: var(--color-danger-hover); }

/* Гибкость */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.flex-center  { align-items: center; justify-content: center; }
.items-center { align-items: center; }
.gap-2        { gap: var(--space-2); }
.gap-3        { gap: var(--space-3); }
.gap-4        { gap: var(--space-4); }

/* Скругление */
.rounded-sm   { border-radius: var(--radius-sm); }
.rounded      { border-radius: var(--radius-md); }
.rounded-lg   { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* ============================================================
   17. АДАПТИВНОСТЬ — Общая
   ============================================================ */

@media (max-width: 840px) {
  .nav__links a:not(.btn):not(.nav__back) {
    display: none;
  }
}

@media (max-width: 600px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-2xl); }

  .container {
    padding: 0 var(--space-4);
  }

  .footer__top {
    flex-direction: column;
    gap: var(--space-6);
  }

  .footer__nav {
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .footer__links {
    flex-wrap: wrap;
    gap: var(--space-4);
  }
}