/* ============================================
   Design Kit — CSS Custom Properties & Components
   Mobile-first, based on app design system
   ============================================ */

/* --- Design Tokens (CSS Custom Properties) --- */
:root {
  /* Colors */
  --color-black: #0D0D0D;
  --color-surface: #1C1C1C;
  --color-primary: #75BC7A;
  --color-secondary: #FFA487;
  --color-secondary-2: #EADD68;
  --color-accent: #FF7364;
  --color-white: #FFFFFF;
  --color-text: #FFFFFF;
  --color-text-muted: rgba(255, 255, 255, 0.8);
  --color-text-subtle: rgba(255, 255, 255, 0.6);
  --color-error: #FF7364;
  --color-border: rgba(255, 255, 255, 0.15);
  --color-input-bg: #1C1C1C;
  --color-input-border: rgba(255, 255, 255, 0.2);
  --color-input-border-focus: var(--color-primary);
  --color-input-border-error: var(--color-error);

  /* Border radius */
  --radius-button: 99px;
  --radius-card: 24px;
  --radius-input: 24px;
  --radius-badge: 99px;

  /* Typography — SF Pro (system), fallbacks for other OS */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-weight-normal: 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-2xs: 0.125rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  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-black);
  -webkit-font-smoothing: antialiased;
}

/* --- Typography --- */
h1, h2, h3, h4, p {
  margin: 0 0 var(--space-md);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-normal);
}

p {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.dk-caption {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
  margin-bottom: var(--space-sm);
}

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

/* --- 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-medium);
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base),
    border-color var(--transition-base), transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

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

.dk-btn:active {
  transform: scale(0.98);
}

/* Primary — dark */
.dk-btn-primary {
  background-color: var(--color-surface);
  color: var(--color-white);
  border: 2px solid transparent;
}

.dk-btn-primary:hover {
  background-color: #2a2a2a;
}

/* Primary — green */
.dk-btn-primary-green {
  background-color: var(--color-primary);
  color: var(--color-black);
}

.dk-btn-primary-green:hover {
  background-color: #8bc98f;
}

/* Secondary — filled */
.dk-btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-black);
}

.dk-btn-secondary:hover {
  background-color: #ffb399;
}

/* Secondary — outline */
.dk-btn-outline {
  background-color: transparent;
  color: var(--color-secondary);
  border: 2px solid var(--color-secondary);
}

.dk-btn-outline:hover {
  background-color: rgba(255, 164, 135, 0.15);
}

/* Sizes */
.dk-btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
}

.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-2xl);
  font-size: var(--font-size-lg);
}

/* Icon in button */
.dk-btn .dk-icon {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}

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

.dk-input,
.dk-select {
  width: 100%;
  max-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-input-bg);
  border: 2px solid var(--color-input-border);
  border-radius: var(--radius-input);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
}

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

.dk-input:focus,
.dk-select:focus {
  outline: none;
  border-color: var(--color-input-border-focus);
  box-shadow: 0 0 0 3px rgba(117, 188, 122, 0.2);
}

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

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

.dk-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 1.25rem;
  padding-right: 2.75rem;
}

/* Checkbox */
.dk-checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
}

.dk-checkbox {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
}

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

/* Number control (stepper) */
.dk-stepper {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-input-bg);
  border: 2px solid var(--color-input-border);
  border-radius: var(--radius-input);
}

.dk-stepper-btn {
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-button);
  background-color: var(--color-secondary-2);
  color: var(--color-black);
  cursor: pointer;
  transition: background-color var(--transition-base), transform var(--transition-fast);
  flex-shrink: 0;
}

.dk-stepper-btn:hover {
  background-color: #f0e878;
}

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

.dk-stepper-value {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  min-width: 4rem;
  text-align: center;
}

/* --- Cards --- */
.dk-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
}

.dk-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
}

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

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

/* --- Badges --- */
.dk-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-badge);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

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

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

.dk-badge-outline {
  background-color: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* --- Icons (utility) --- */
.dk-icon {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}

.dk-icon-sm {
  width: 1rem;
  height: 1rem;
}

.dk-icon-lg {
  width: 1.5rem;
  height: 1.5rem;
}

.dk-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

.dk-section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

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

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

/* Color swatch for palette */
.dk-swatch {
  width: 100%;
  min-height: 4rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: flex-end;
  padding: var(--space-sm);
}

.dk-swatch-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  font-weight: var(--font-weight-medium);
}

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

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

@media (min-width: 1024px) {
  .dk-grid-col-3 {
    grid-template-columns: repeat(4, 1fr);
  }
}