/* ==========================================================================
   Design Kit — токены и компоненты (mobile-first)
   ========================================================================== */

:root {
  /* Цвета */
  --color-primary: #0768ea;
  --color-primary-dark: #0653bb;
  --color-accent: #ccff02;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-orange: #dc602e;

  /* Семантика */
  --color-bg: var(--color-black);
  --color-surface: #1a1a1a;
  --color-text: var(--color-white);
  --color-text-muted: #a3a3a3;
  --color-border: rgba(255, 255, 255, 0.35);
  --color-border-focus: var(--color-orange);
  --color-error: var(--color-orange);

  /* Типографика */
  --font-display: "Stalinist One", system-ui, sans-serif;
  --font-body: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;

  --fs-caption: 0.75rem;
  --fs-body: 1rem;
  --fs-body-lg: 1.125rem;
  --fs-h4: 1.25rem;
  --fs-h3: 1.5rem;
  --fs-h2: clamp(1.75rem, 5vw, 2.25rem);
  --fs-h1: clamp(2rem, 6vw, 2.75rem);

  --lh-tight: 1.15;
  --lh-body: 1.5;

  /* Геометрия */
  --radius: 0;
  --border-width: 1px;
  --border-thick: 2px;

  /* Отступы */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Кнопки */
  --btn-py-sm: 0.5rem;
  --btn-px-sm: 1rem;
  --btn-py-md: 0.75rem;
  --btn-px-md: 1.25rem;
  --btn-py-lg: 1rem;
  --btn-px-lg: 1.5rem;

  /* Иконки */
  --icon-s: 1.25rem;
  --icon-m: 1.5rem;
  --icon-l: 2rem;
  --icon-circle: 2.5rem;

  /* Переходы */
  --transition-fast: 120ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

/* --------------------------------------------------------------------------
   Типографика
   -------------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
.dk-heading {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--lh-tight);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0 0 var(--space-md);
}

h1 {
  font-size: var(--fs-h1);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

h4 {
  font-size: var(--fs-h4);
}

p {
  margin: 0 0 var(--space-md);
}

.dk-caption,
.caption {
  font-size: var(--fs-caption);
  line-height: var(--lh-body);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}

.dk-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

.dk-link:hover {
  color: var(--color-white);
}

.dk-link:focus-visible {
  outline: var(--border-thick) solid var(--color-border-focus);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Кнопки
   -------------------------------------------------------------------------- */

.dk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin: 0;
  padding: var(--btn-py-md) var(--btn-px-md);
  font-family: var(--font-display);
  font-size: 0.875rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast);
}

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

.dk-btn--primary {
  color: var(--color-white);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.dk-btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.dk-btn--secondary {
  color: var(--color-black);
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.dk-btn--secondary:hover {
  filter: brightness(0.95);
}

.dk-btn--outline {
  color: var(--color-white);
  background-color: transparent;
  border-color: var(--color-white);
}

.dk-btn--outline:hover {
  background-color: var(--color-white);
  color: var(--color-black);
}

.dk-btn--danger {
  color: var(--color-white);
  background-color: var(--color-orange);
  border-color: var(--color-orange);
}

.dk-btn--danger:hover {
  filter: brightness(1.08);
}

.dk-btn--block {
  width: 100%;
}

.dk-btn--sm {
  padding: var(--btn-py-sm) var(--btn-px-sm);
  font-size: 0.75rem;
}

.dk-btn--lg {
  padding: var(--btn-py-lg) var(--btn-px-lg);
  font-size: 1rem;
}

.dk-btn:disabled,
.dk-btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Формы
   -------------------------------------------------------------------------- */

.dk-field {
  margin-bottom: var(--space-lg);
}

.dk-label {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.dk-input,
.dk-select,
.dk-textarea {
  width: 100%;
  max-width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.dk-input::placeholder,
.dk-textarea::placeholder {
  color: var(--color-text-muted);
}

.dk-input:focus,
.dk-select:focus,
.dk-textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 1px var(--color-border-focus);
}

.dk-input--error,
.dk-select--error,
.dk-textarea--error {
  border-color: var(--color-error);
}

.dk-field-error {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--fs-caption);
  color: var(--color-error);
}

.dk-textarea {
  min-height: 6rem;
  resize: vertical;
}

.dk-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23ffffff' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: 2.5rem;
}

.dk-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  cursor: pointer;
  user-select: none;
}

.dk-check__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.dk-check__box {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15em;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-black);
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.dk-check__input:focus-visible + .dk-check__box {
  outline: var(--border-thick) solid var(--color-border-focus);
  outline-offset: 2px;
}

.dk-check__input:checked + .dk-check__box {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23000000' d='M13.2 4.5L6.5 11.2 2.8 7.5l1.4-1.4 2.3 2.3 5.3-5.3z'/%3E%3C/svg%3E");
  background-size: 0.85rem;
  background-position: center;
  background-repeat: no-repeat;
}

.dk-check__text {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

/* --------------------------------------------------------------------------
   Карточки
   -------------------------------------------------------------------------- */

.dk-card {
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-black);
  overflow: hidden;
}

.dk-card__header {
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-white);
  color: var(--color-black);
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.dk-card__accent {
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
}

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

.dk-card--invert .dk-card__header {
  background-color: var(--color-accent);
  color: var(--color-black);
}

/* --------------------------------------------------------------------------
   Бейджи
   -------------------------------------------------------------------------- */

.dk-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  font-weight: 600;
  line-height: 1;
  border: var(--border-width) solid var(--color-white);
  border-radius: var(--radius);
  background-color: var(--color-black);
  color: var(--color-white);
}

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

.dk-badge--accent {
  background-color: var(--color-accent);
  border-color: var(--color-black);
  color: var(--color-black);
}

.dk-badge--orange {
  background-color: var(--color-orange);
  border-color: var(--color-orange);
}

/* --------------------------------------------------------------------------
   Иконки (инлайн SVG)
   -------------------------------------------------------------------------- */

.dk-icon {
  display: inline-flex;
  flex-shrink: 0;
  width: var(--icon-m);
  height: var(--icon-m);
  color: currentColor;
}

.dk-icon svg {
  width: 100%;
  height: 100%;
}

.dk-icon--s {
  width: var(--icon-s);
  height: var(--icon-s);
}

.dk-icon--l {
  width: var(--icon-l);
  height: var(--icon-l);
}

.dk-icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--icon-circle);
  height: var(--icon-circle);
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
}

.dk-icon-circle--orange {
  background-color: var(--color-orange);
}

/* --------------------------------------------------------------------------
   Витрина (layout страницы)
   -------------------------------------------------------------------------- */

.dk-page {
  min-height: 100vh;
  padding: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

.dk-container {
  width: 100%;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.dk-section {
  margin-bottom: var(--space-2xl);
}

.dk-section-title {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: var(--border-width) solid var(--color-border);
}

.dk-swatch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
}

@media (min-width: 480px) {
  .dk-swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.dk-swatch {
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.dk-swatch__color {
  aspect-ratio: 1.4 / 1;
}

.dk-swatch__meta {
  padding: var(--space-sm);
  font-size: var(--fs-caption);
  background-color: var(--color-surface);
  word-break: break-all;
}

.dk-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.dk-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
}

.dk-icon-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
}

.dk-header-bar {
  margin: calc(-1 * var(--space-lg)) calc(-1 * var(--space-lg)) var(--space-xl);
  padding: var(--space-lg);
  background-color: var(--color-accent);
  color: var(--color-black);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), 50% 100%, 0 calc(100% - 12px));
}

.dk-header-bar h1 {
  margin: 0;
  color: inherit;
}

.dk-muted {
  color: var(--color-text-muted);
}