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

/* ========== CSS Custom Properties ========== */
:root {
  /* Colors */
  --color-blue-saturated: #5EAEE6;
  --color-blue-light: #ACEFFA;
  --color-blue-bg: #E1F7FD;
  --color-beige: #FFCA95;
  --color-red: #FB9393;
  --color-black: #252E35;
  --color-gray: #727B81;
  --color-white: #FFFFFF;
  --color-white-alt: #F2F2F4;

  /* Semantic colors */
  --color-primary: var(--color-blue-saturated);
  --color-accent: var(--color-beige);
  --color-error: var(--color-red);
  --color-text: var(--color-black);
  --color-text-secondary: var(--color-gray);
  --color-bg: var(--color-white-alt);
  --color-bg-card: var(--color-white);
  --color-border: var(--color-white-alt);

  /* Typography */
  --font-family: 'Alexandria', -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-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: 1.6;

  /* 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: 6px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(37, 46, 53, 0.05);
  --shadow-md: 0 4px 6px rgba(37, 46, 53, 0.07);
  --shadow-lg: 0 10px 15px rgba(37, 46, 53, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
}

/* ========== Base / Reset ========== */
.design-kit {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

body.design-kit {
  margin: 0;
  padding: var(--space-lg);
  min-height: 100vh;
}

/* ========== Typography ========== */
.design-kit h1,
.design-kit .h1 {
  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);
}

.design-kit h2,
.design-kit .h2 {
  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);
}

.design-kit h3,
.design-kit .h3 {
  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);
}

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

.design-kit p,
.design-kit .p {
  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);
}

.design-kit .caption {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
}

.design-kit .caption-sm {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-secondary);
}

/* ========== Buttons ========== */
.design-kit .btn,
.landing .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}

.design-kit .btn:active,
.landing .btn:active {
  transform: scale(0.98);
}

/* Primary */
.design-kit .btn-primary,
.landing .btn-primary {
  background-color: var(--color-black);
  color: var(--color-white);
}

.design-kit .btn-primary:hover,
.landing .btn-primary:hover {
  background-color: #1a2228;
}

.design-kit .btn-primary:active,
.landing .btn-primary:active {
  background-color: var(--color-accent);
}

/* Secondary */
.design-kit .btn-secondary,
.landing .btn-secondary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.design-kit .btn-secondary:hover,
.landing .btn-secondary:hover {
  background-color: #4a9dd4;
}

.design-kit .btn-secondary:active,
.landing .btn-secondary:active {
  background-color: var(--color-accent);
  color: var(--color-black);
}

/* Outline */
.design-kit .btn-outline,
.landing .btn-outline {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 2px solid var(--color-border);
}

.design-kit .btn-outline:hover,
.landing .btn-outline:hover {
  border-color: var(--color-gray);
  color: var(--color-text);
}

.design-kit .btn-outline:active,
.landing .btn-outline:active {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Sizes */
.design-kit .btn-sm,
.landing .btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
}

.design-kit .btn-md,
.landing .btn-md {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base);
}

.design-kit .btn-lg,
.landing .btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.design-kit .btn-block,
.landing .btn-block {
  width: 100%;
}

/* Icon button */
.design-kit .btn-icon,
.landing .btn-icon {
  padding: var(--space-md);
  aspect-ratio: 1;
}

.design-kit .btn-icon.btn-sm,
.landing .btn-icon.btn-sm {
  padding: var(--space-sm);
}

.design-kit .btn-icon.btn-lg,
.landing .btn-icon.btn-lg {
  padding: var(--space-md);
}

/* ========== Forms ========== */
.design-kit .form-group {
  margin-bottom: var(--space-md);
}

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

.design-kit .form-input,
.design-kit .form-select,
.design-kit .form-textarea {
  width: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.design-kit .form-input::placeholder,
.design-kit .form-textarea::placeholder {
  color: var(--color-text-secondary);
}

.design-kit .form-input:hover,
.design-kit .form-select:hover,
.design-kit .form-textarea:hover {
  border-color: var(--color-gray);
}

.design-kit .form-input:focus,
.design-kit .form-select:focus,
.design-kit .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 202, 149, 0.2);
}

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

.design-kit .form-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-xs);
}

.design-kit .form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23727B81' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: 2.5rem;
}

.design-kit .form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* ========== Form Outlined (App style) ========== */
.design-kit .form-field-outlined {
  position: relative;
  margin-bottom: var(--space-lg);
}

.design-kit .form-field-outlined:last-child {
  margin-bottom: 0;
}

.design-kit .form-field-outlined .form-input-outlined,
.design-kit .form-field-outlined .form-select-outlined,
.design-kit .form-field-outlined .form-textarea-outlined {
  width: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-md);
  padding-top: var(--space-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.design-kit .form-field-outlined .form-input-outlined::placeholder,
.design-kit .form-field-outlined .form-textarea-outlined::placeholder {
  color: var(--color-text-secondary);
}

.design-kit .form-field-outlined .form-label-outlined {
  position: absolute;
  left: var(--space-md);
  top: 0;
  transform: translateY(-50%);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  background-color: var(--color-white);
  padding: 0 var(--space-xs);
  pointer-events: none;
  z-index: 1;
}

.design-kit .form-field-outlined .form-input-outlined:hover,
.design-kit .form-field-outlined .form-select-outlined:hover,
.design-kit .form-field-outlined .form-textarea-outlined:hover {
  border-color: var(--color-text);
}

.design-kit .form-field-outlined .form-input-outlined:focus,
.design-kit .form-field-outlined .form-select-outlined:focus,
.design-kit .form-field-outlined .form-textarea-outlined:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(255, 202, 149, 0.2);
}

.design-kit .form-field-outlined .form-input-outlined.error,
.design-kit .form-field-outlined .form-select-outlined.error,
.design-kit .form-field-outlined .form-textarea-outlined.error {
  border-color: var(--color-error);
}

.design-kit .form-field-outlined .form-select-outlined {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23727B81' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: 2.5rem;
}

.design-kit .form-field-outlined .form-range {
  margin-top: var(--space-md);
  display: block;
}

.design-kit .form-field-outlined .form-textarea-outlined {
  min-height: 80px;
  resize: vertical;
}

.design-kit .form-field-outlined .form-error {
  margin-top: var(--space-xs);
}

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

.design-kit .form-checkbox input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.design-kit .form-checkbox .checkbox-box {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.design-kit .form-checkbox input:checked + .checkbox-box {
  background-color: var(--color-black);
  border-color: var(--color-black);
}

.design-kit .form-checkbox input:checked + .checkbox-box::after {
  content: '';
  display: block;
  width: 6px;
  height: 10px;
  border: solid var(--color-white);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.design-kit .form-checkbox:hover .checkbox-box {
  border-color: var(--color-gray);
}

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

/* Radio */
.design-kit .form-radio {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
}

.design-kit .form-radio input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.design-kit .form-radio .radio-box {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background-color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.design-kit .form-radio input:checked + .radio-box {
  background-color: var(--color-black);
  border-color: var(--color-black);
}

.design-kit .form-radio input:checked + .radio-box::after {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-white);
}

.design-kit .form-radio:hover .radio-box {
  border-color: var(--color-gray);
}

.design-kit .form-radio .radio-label {
  font-size: var(--font-size-base);
  color: var(--color-text);
}

/* ========== Cards ========== */
.design-kit .card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  transition: box-shadow var(--transition-base);
}

.design-kit .card:hover {
  box-shadow: var(--shadow-lg);
}

.design-kit .card-header {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.design-kit .card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin: 0;
}

.design-kit .card-body {
  margin-bottom: var(--space-md);
}

.design-kit .card-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

/* Card accent (loan amount style) */
.design-kit .card-accent {
  background-color: var(--color-accent);
  color: var(--color-text);
}

/* ========== Badges ========== */
.design-kit .badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
}

.design-kit .badge-approved {
  background-color: var(--color-accent);
  color: var(--color-black);
}

.design-kit .badge-pending {
  background-color: var(--color-blue-bg);
  color: var(--color-text);
}

.design-kit .badge-rejected {
  background-color: var(--color-error);
  color: var(--color-white);
}

.design-kit .badge-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.design-kit .badge-gray {
  background-color: var(--color-white-alt);
  color: var(--color-text-secondary);
}

.design-kit .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.design-kit .badge-approved .badge-dot {
  background-color: #2e7d32;
}

.design-kit .badge-pending .badge-dot {
  background-color: var(--color-accent);
}

.design-kit .badge-rejected .badge-dot {
  background-color: var(--color-white);
}

/* ========== Icons (inline SVG placeholders) ========== */
.design-kit .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.design-kit .icon-sm {
  width: 16px;
  height: 16px;
}

.design-kit .icon-lg {
  width: 32px;
  height: 32px;
}

.design-kit .icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

/* ========== Section / Layout ========== */
.design-kit .section {
  margin-bottom: var(--space-2xl);
}

.design-kit .section-title {
  font-size: var(--font-size-xl);
  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-border);
}

.design-kit .grid {
  display: grid;
  gap: var(--space-md);
}

.design-kit .grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.design-kit .grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.design-kit .flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.design-kit .flex-center {
  align-items: center;
}

/* ========== Slider (range input) ========== */
.design-kit .form-range {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  background: var(--color-blue-bg);
  border-radius: var(--radius);
  outline: none;
}

.design-kit .form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.design-kit .form-range::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

/* ========== Pagination dots ========== */
.design-kit .pagination-dots {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.design-kit .pagination-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-white-alt);
  transition: background-color var(--transition-fast);
}

.design-kit .pagination-dot.active {
  background-color: var(--color-accent);
}

/* ========== Responsive ========== */
@media (min-width: 768px) {
  .design-kit .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .design-kit .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}