/**
 * Design Kit — токены и компоненты (mobile-first)
 * Цвета: #F0EFED, rgba(255,255,255,0.5), #010122, #EA7328
 */

/* -------------------------------------------------------------------------- */
/* Tokens                                                                      */
/* -------------------------------------------------------------------------- */

:root {
  /* Colors */
  --color-bg: #f0efed;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.5);
  --color-ink: #010122;
  --color-ink-muted: color-mix(in srgb, var(--color-ink) 65%, transparent);
  --color-ink-subtle: color-mix(in srgb, var(--color-ink) 45%, transparent);
  --color-accent: #ea7328;
  --color-accent-hover: color-mix(in srgb, var(--color-accent) 88%, #ffffff);
  --color-accent-press: color-mix(in srgb, var(--color-accent) 75%, #000000);
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 18%, var(--color-bg));
  --color-accent-outline: color-mix(in srgb, var(--color-accent) 35%, var(--color-bg));
  --color-border: color-mix(in srgb, var(--color-ink) 12%, var(--color-bg));
  --color-border-strong: color-mix(in srgb, var(--color-ink) 20%, var(--color-bg));
  --color-danger: #c42b2b;
  --color-success: var(--color-accent);

  /* Typography */
  --font-sans: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 1rem;
  --text-md: 1.0625rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2rem;
  --text-4xl: 2.25rem;

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;

  /* Radius: пилюли/кнопки — 99px; карточки — 24px */
  --radius-pill: 99px;
  --radius-card: 24px;
  --radius-sm: 10px;

  /* Spacing (4px grid) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Shadows */
  --shadow-card: 0 4px 24px color-mix(in srgb, var(--color-ink) 8%, transparent);
  --shadow-sm: 0 1px 3px color-mix(in srgb, var(--color-ink) 10%, transparent);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 140ms;
  --duration-normal: 220ms;

  /* Focus */
  --focus-ring: 0 0 0 3px color-mix(in srgb, var(--color-accent) 45%, transparent);
  --focus-ring-offset: 2px;

  /* Layout */
  --container-max: 72rem;
  --section-gap: var(--space-8);
}

@media (min-width: 48rem) {
  :root {
    --text-3xl: 2.25rem;
    --text-4xl: 2.75rem;
    --section-gap: var(--space-10);
  }
}

/* -------------------------------------------------------------------------- */
/* Base                                                                        */
/* -------------------------------------------------------------------------- */

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

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

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* -------------------------------------------------------------------------- */
/* Typography                                                                  */
/* -------------------------------------------------------------------------- */

.dk-h1,
h1.dk-h1 {
  margin: 0 0 var(--space-4);
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}

.dk-h2,
h2.dk-h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-2xl);
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}

.dk-h3,
h3.dk-h3 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
}

.dk-h4,
h4.dk-h4 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
}

.dk-p,
p.dk-p {
  margin: 0 0 var(--space-4);
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--color-ink-muted);
  max-width: 65ch;
}

.dk-p:last-child {
  margin-bottom: 0;
}

.dk-caption,
small.dk-caption,
.dk-label {
  display: block;
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-ink-subtle);
}

.dk-lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-ink-muted);
  max-width: 52ch;
}

.dk-link {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color var(--duration-fast) var(--ease-out);
}

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

@media (min-width: 48rem) {
  .dk-h1,
  h1.dk-h1 {
    font-size: var(--text-4xl);
  }
}

/* -------------------------------------------------------------------------- */
/* Buttons                                                                     */
/* -------------------------------------------------------------------------- */

.dk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding: 0 var(--space-6);
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.dk-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.dk-btn:active:not(:disabled) {
  transform: scale(0.98);
}

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

.dk-btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.dk-btn--primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.dk-btn--primary:active:not(:disabled) {
  background-color: var(--color-accent-press);
  border-color: var(--color-accent-press);
}

.dk-btn--secondary {
  background-color: var(--color-surface-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-ink);
  border-color: var(--color-border);
}

.dk-btn--secondary:hover:not(:disabled) {
  background-color: color-mix(in srgb, var(--color-surface) 85%, transparent);
  border-color: var(--color-border-strong);
}

.dk-btn--outline {
  background-color: var(--color-surface);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.dk-btn--outline:hover:not(:disabled) {
  background-color: var(--color-accent-soft);
}

.dk-btn--sm {
  min-height: 2.25rem;
  padding: 0 var(--space-4);
  font-size: var(--text-xs);
}

.dk-btn--lg {
  min-height: 3.25rem;
  padding: 0 var(--space-8);
  font-size: var(--text-base);
}

.dk-btn--icon {
  width: 2.75rem;
  min-width: 2.75rem;
  padding: 0;
}

.dk-btn--icon.dk-btn--sm {
  width: 2.25rem;
  min-width: 2.25rem;
}

.dk-btn__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* -------------------------------------------------------------------------- */
/* Forms                                                                       */
/* -------------------------------------------------------------------------- */

.dk-field {
  margin-bottom: var(--space-5);
}

.dk-field:last-child {
  margin-bottom: 0;
}

.dk-input,
.dk-select,
.dk-textarea {
  width: 100%;
  max-width: 100%;
  min-height: 2.75rem;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink);
  transition: border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.dk-textarea {
  min-height: 6rem;
  border-radius: var(--radius-card);
  resize: vertical;
}

.dk-input::placeholder,
.dk-textarea::placeholder {
  color: var(--color-ink-subtle);
}

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

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

.dk-input:disabled,
.dk-select:disabled,
.dk-textarea:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background-color: color-mix(in srgb, var(--color-bg) 60%, var(--color-surface));
}

.dk-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23010122' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

.dk-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  color: var(--color-ink);
}

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

.dk-checkbox__box {
  flex-shrink: 0;
  width: 1.375rem;
  height: 1.375rem;
  margin-top: 0.1em;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  display: grid;
  place-items: center;
  transition: border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out);
}

.dk-checkbox__check {
  width: 0.75rem;
  height: 0.75rem;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.dk-checkbox__input:focus-visible + .dk-checkbox__box {
  box-shadow: var(--focus-ring);
}

.dk-checkbox__input:checked + .dk-checkbox__box {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.dk-checkbox__input:checked + .dk-checkbox__box .dk-checkbox__check {
  opacity: 1;
  transform: scale(1);
}

.dk-checkbox__input:disabled + .dk-checkbox__box {
  opacity: 0.5;
  cursor: not-allowed;
}

.dk-hint {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-subtle);
}

.dk-error {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-danger);
}

/* -------------------------------------------------------------------------- */
/* Cards                                                                       */
/* -------------------------------------------------------------------------- */

.dk-card {
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.dk-card__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-ink);
}

.dk-card__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-ink-muted);
}

.dk-card--glass {
  background-color: var(--color-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.dk-card--accent-border {
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
}

/* -------------------------------------------------------------------------- */
/* Badges                                                                      */
/* -------------------------------------------------------------------------- */

.dk-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  line-height: 1.3;
  border: 2px solid transparent;
}

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

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

.dk-badge--neutral {
  background-color: color-mix(in srgb, var(--color-ink) 6%, var(--color-bg));
  color: var(--color-ink-muted);
  border-color: var(--color-border);
}

.dk-badge--dark {
  background-color: var(--color-ink);
  color: #fff;
}

/* -------------------------------------------------------------------------- */
/* Icons (utility)                                                             */
/* -------------------------------------------------------------------------- */

.dk-icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  color: var(--color-ink);
}

.dk-icon--sm {
  width: 1.125rem;
  height: 1.125rem;
}

.dk-icon--lg {
  width: 2rem;
  height: 2rem;
}

.dk-icon--accent {
  color: var(--color-accent);
}

.dk-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background-color: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.dk-icon-btn:hover {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

.dk-icon-btn:active {
  transform: scale(0.95);
}

.dk-icon-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.dk-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
}

.dk-status--success {
  background-color: var(--color-accent);
  color: #fff;
}

.dk-status--error {
  background-color: var(--color-ink);
  color: #fff;
}

.dk-status--loading {
  background-color: var(--color-surface);
  color: var(--color-accent);
  border: 2px solid var(--color-border);
}