/**
 * Design Kit — UI Kit на базе дизайн-системы мобильного приложения
 * Mobile-first, CSS Custom Properties
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

:root {
  /* Primary Colors */
  --color-primary: #7D1CF0;
  --color-primary-hover: #6B16D4;
  --color-primary-press: #5A12B8;
  --color-primary-inactive: rgba(125, 28, 240, 0.5);
  
  --color-outline: rgba(255, 255, 255, 0.25);
  --color-text: #EAEAEA;
  --color-text-muted: #AFA8B8;
  --color-text-overlay: rgba(20, 19, 39, 0.6);
  
  --color-bg: #05040F;
  --color-bg-elevated: #0F1A30;
  --color-bg-input: rgba(15, 26, 48, 0.8);
  
  /* Secondary Colors */
  --color-error: #9D1935;
  --color-success: #5FBC18;
  --color-warning: #FFBD04;
  
  /* Typography */
  --font-family: 'Rubik', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 2rem;     /* 32px */
  --font-size-4xl: 2.5rem;   /* 40px */
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;   /* 24px */
  --space-xl: 2rem;     /* 32px */
  --space-2xl: 3rem;    /* 48px */
  
  /* Border Radius */
  --radius-md: 16px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
}

/* ============================================
   Base Styles
   ============================================ */

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

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

/* ============================================
   Typography
   ============================================ */

.dk-h1,
h1.dk {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}

.dk-h2,
h2.dk {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin: 0 0 var(--space-md);
}

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

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

.dk-paragraph,
p.dk {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  margin: 0 0 var(--space-md);
}

.dk-caption {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-muted);
  margin: 0;
}

.dk-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.dk-link:active {
  color: var(--color-primary-press);
}

/* Display text (amounts, large numbers) */
.dk-display {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

/* ============================================
   Buttons
   ============================================ */

.dk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-weight: var(--font-weight-semibold);
  border: 2px solid var(--color-outline);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color var(--transition-fast), 
              border-color var(--transition-fast),
              opacity var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

/* Primary Button */
.dk-btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text);
}

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

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

.dk-btn-primary:disabled {
  background-color: var(--color-primary-inactive);
  cursor: not-allowed;
  opacity: 0.8;
}

/* Secondary Button (filled with secondary colors) */
.dk-btn-secondary-success {
  background-color: var(--color-success);
  color: var(--color-text);
}

.dk-btn-secondary-error {
  background-color: var(--color-error);
  color: var(--color-text);
}

.dk-btn-secondary-warning {
  background-color: var(--color-warning);
  color: var(--color-text);
}

.dk-btn-secondary-success:hover:not(:disabled),
.dk-btn-secondary-error:hover:not(:disabled),
.dk-btn-secondary-warning:hover:not(:disabled) {
  opacity: 0.9;
}

/* Outline Button */
.dk-btn-outline {
  background-color: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-primary);
}

.dk-btn-outline:hover:not(:disabled) {
  background-color: rgba(125, 28, 240, 0.1);
}

.dk-btn-outline:active:not(:disabled) {
  background-color: rgba(125, 28, 240, 0.2);
}

.dk-btn-outline:disabled {
  border-color: var(--color-outline);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Text Link Button — без обводки */
.dk-btn-text {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
}

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

.dk-btn-text:disabled {
  color: var(--color-text-muted);
  cursor: not-allowed;
}

/* Button Sizes */
.dk-btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

.dk-btn-md {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
}

.dk-btn-lg {
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-lg);
  width: 100%;
  max-width: 100%;
}

/* ============================================
   Forms
   ============================================ */

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

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

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

.dk-input,
.dk-select,
.dk-textarea {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg-input);
  border: 2px solid var(--color-outline);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.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-primary);
}

.dk-input:disabled,
.dk-select:disabled,
.dk-textarea:disabled {
  border-color: var(--color-outline);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

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

.dk-input-error-message {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-xs);
}

/* Select with custom arrow */
.dk-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%23AFA8B8' stroke-width='2'%3E%3Cpath d='M2 4L6 8L10 4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-lg) center;
  padding-right: 2.5rem;
}

/* Checkbox */
.dk-checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
}

.dk-checkbox {
  width: 24px;
  height: 24px;
  min-width: 24px;
  margin: 0;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.dk-checkbox-label {
  font-size: var(--font-size-base);
  color: var(--color-text);
}

/* OTP Input */
.dk-otp-group {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.dk-otp-input {
  width: 48px;
  height: 56px;
  padding: var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  color: var(--color-text);
  background-color: var(--color-bg-input);
  border: 2px solid var(--color-outline);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.dk-otp-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.dk-otp-input.dk-input-error {
  border-color: var(--color-error);
}

/* Toggle / Segmented Control */
.dk-toggle {
  display: flex;
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-xs);
}

.dk-toggle-option {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background-color: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.dk-toggle-option.active {
  background-color: var(--color-primary);
  color: var(--color-text);
}

/* ============================================
   Cards
   ============================================ */

.dk-card {
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-outline);
}

.dk-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.dk-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
}

.dk-card-body {
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
}

.dk-card-body .dk-display {
  margin: var(--space-sm) 0;
}

/* ============================================
   Badges
   ============================================ */

.dk-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-radius: var(--radius-full);
}

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

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

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

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

/* ============================================
   Icons & Icon Buttons
   ============================================ */

.dk-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: var(--color-bg-elevated);
  border: 2px solid var(--color-outline);
  border-radius: 50%;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition-fast), 
              color var(--transition-fast),
              background-color var(--transition-fast);
}

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

.dk-icon-btn:active {
  background-color: rgba(125, 28, 240, 0.2);
}

.dk-icon-btn svg {
  width: 20px;
  height: 20px;
}

/* Star Rating */
.dk-star-rating {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

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

.dk-star.filled {
  color: var(--color-warning);
}

/* ============================================
   Progress Dots
   ============================================ */

.dk-progress-dots {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.dk-progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-text-muted);
  opacity: 0.5;
  transition: opacity var(--transition-fast), 
              background-color var(--transition-fast);
}

.dk-progress-dot.active {
  background-color: var(--color-primary);
  opacity: 1;
}

/* ============================================
   Section Headers (for showcase)
   ============================================ */

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

.dk-section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin: 0 0 var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-outline);
}

.dk-section-subtitle {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

/* ============================================
   Showcase Grid
   ============================================ */

.dk-showcase-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .dk-showcase-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .dk-showcase-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   Slider (Range Input)
   ============================================ */

.dk-slider {
  width: 100%;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
}

.dk-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  margin-top: -8px;
}

.dk-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}