/* ============================================================
   Slate UI Design System — Compiled CSS
   Version: 1.0.0
   ============================================================ */

/* ------------------------------------------------------------
   1. VARIABLES (CSS Custom Properties)
   ------------------------------------------------------------ */

:root {
  /* Core Palette */
  --slate-obsidian: #37353e;
  --slate-graphite: #44444e;
  --slate-mauve: #715a5a;
  --slate-mist: #d3dad9;

  /* Extended Palette */
  --slate-void: #2a2831;
  --slate-ash: #5c5b66;
  --slate-clay: #8c6e6e;
  --slate-blush: #a38a8a;
  --slate-fog: #bfc7c6;
  --slate-pearl: #ebf0ef;
  --slate-white: #f7faf9;

  /* Semantic Colors */
  --slate-accent: #c2866b;
  --slate-accent-soft: #d4a48e;
  --slate-info: #6b8fa3;
  --slate-success: #6e9477;
  --slate-warning: #c2a24e;
  --slate-danger: #b85c5c;

  /* Surfaces */
  --surface-0: var(--slate-void);
  --surface-1: var(--slate-obsidian);
  --surface-2: var(--slate-graphite);
  --surface-3: var(--slate-ash);

  /* Typography — Font Families */
  --font-display: "DM Serif Display", Georgia, serif;
  --font-body: "Satoshi", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Typography — Text Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Typography — Leading */
  --leading-tight: 1.2;
  --leading-normal: 1.6;
  --leading-loose: 1.8;

  /* Typography — Tracking */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;

  /* Spacing Scale (4px base) */
  --space-0: 0;
  --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;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px rgba(194, 134, 107, 0.3);

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-toast: 500;

  /* Borders */
  --border-subtle: 1px solid rgba(211, 218, 217, 0.1);
  --border-default: 1px solid rgba(211, 218, 217, 0.15);
  --border-strong: 1px solid rgba(211, 218, 217, 0.25);
}


/* ------------------------------------------------------------
   2. RESET
   ------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--slate-mist);
  background-color: var(--surface-0);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color-scheme: dark;
  min-height: 100vh;
}

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: var(--slate-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--slate-accent-soft);
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

::selection {
  background-color: rgba(194, 134, 107, 0.3);
  color: var(--slate-white);
}

:focus-visible {
  outline: 2px solid var(--slate-accent);
  outline-offset: 2px;
}


/* ------------------------------------------------------------
   3. TYPOGRAPHY
   ------------------------------------------------------------ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  color: var(--slate-pearl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-block: 0;
}

h1 {
  font-size: var(--text-5xl);
  font-weight: 700;
}

h2 {
  font-size: var(--text-4xl);
  font-weight: 700;
}

h3 {
  font-size: var(--text-3xl);
  font-weight: 600;
}

h4 {
  font-size: var(--text-2xl);
  font-weight: 600;
}

h5 {
  font-size: var(--text-xl);
  font-weight: 600;
}

h6 {
  font-size: var(--text-lg);
  font-weight: 600;
}

p {
  margin-block: var(--space-4);
  max-width: 65ch;
  line-height: var(--leading-normal);
}

/* Text Utility Classes */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

.text-muted { color: var(--slate-ash); }
.text-accent { color: var(--slate-accent); }
.text-success { color: var(--slate-success); }
.text-warning { color: var(--slate-warning); }
.text-danger { color: var(--slate-danger); }
.text-info { color: var(--slate-info); }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }
.font-mono { font-family: var(--font-mono); }

.tracking-wide { letter-spacing: var(--tracking-wide); }
.tracking-wider { letter-spacing: var(--tracking-wider); }
.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--slate-accent-soft);
  background-color: var(--surface-2);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-loose);
  color: var(--slate-fog);
  background-color: var(--surface-1);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
  margin-block: var(--space-4);
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

blockquote {
  border-left: 3px solid var(--slate-accent);
  padding-left: var(--space-4);
  margin-block: var(--space-4);
  color: var(--slate-blush);
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid rgba(211, 218, 217, 0.1);
  margin-block: var(--space-8);
}

mark {
  background-color: rgba(194, 134, 107, 0.25);
  color: var(--slate-pearl);
  padding: 0.1em 0.3em;
  border-radius: var(--radius-sm);
}

kbd {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--slate-pearl);
  background-color: var(--surface-2);
  border: var(--border-default);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  padding: 0.15em 0.5em;
  white-space: nowrap;
}


/* ------------------------------------------------------------
   4. UTILITIES
   ------------------------------------------------------------ */

/* Containers */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container-sm {
  width: 100%;
  max-width: 720px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container-lg {
  width: 100%;
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1 1 0%; }
.flex-none { flex: none; }

/* Grid */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }
.col-span-4 { grid-column: span 4 / span 4; }
.col-span-full { grid-column: 1 / -1; }

/* Gap */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Padding */
.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.px-4 { padding-inline: var(--space-4); }
.px-6 { padding-inline: var(--space-6); }
.py-2 { padding-block: var(--space-2); }
.py-4 { padding-block: var(--space-4); }
.py-8 { padding-block: var(--space-8); }

/* Margin */
.m-auto { margin: auto; }
.mx-auto { margin-inline: auto; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Sizing */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; top: 0; z-index: var(--z-sticky); }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Responsive — Small (640px) */
@media (min-width: 640px) {
  .sm\:flex { display: flex; }
  .sm\:flex-row { flex-direction: row; }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:inline-block { display: inline-block; }
  .sm\:text-left { text-align: left; }
  .sm\:text-center { text-align: center; }
  .sm\:px-6 { padding-inline: var(--space-6); }
  .sm\:py-4 { padding-block: var(--space-4); }
  .sm\:gap-4 { gap: var(--space-4); }
  .sm\:gap-6 { gap: var(--space-6); }
}

/* Responsive — Medium (768px) */
@media (min-width: 768px) {
  .md\:flex { display: flex; }
  .md\:flex-row { flex-direction: row; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:inline-block { display: inline-block; }
  .md\:text-left { text-align: left; }
  .md\:text-center { text-align: center; }
  .md\:px-6 { padding-inline: var(--space-6); }
  .md\:px-8 { padding-inline: var(--space-8); }
  .md\:py-4 { padding-block: var(--space-4); }
  .md\:py-8 { padding-block: var(--space-8); }
  .md\:gap-4 { gap: var(--space-4); }
  .md\:gap-6 { gap: var(--space-6); }
  .md\:gap-8 { gap: var(--space-8); }
}

/* Visual — Border Radius */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Visual — Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-glow { box-shadow: var(--shadow-glow); }

/* Visual — Borders */
.border { border: var(--border-default); }
.border-subtle { border: var(--border-subtle); }
.border-strong { border: var(--border-strong); }

/* Visual — Background Surfaces */
.bg-surface-0 { background-color: var(--surface-0); }
.bg-surface-1 { background-color: var(--surface-1); }
.bg-surface-2 { background-color: var(--surface-2); }
.bg-surface-3 { background-color: var(--surface-3); }
.bg-accent { background-color: var(--slate-accent); }

/* Visual — Opacity */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Visual — Text Overflow */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-1 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-4 {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Transitions */
.transition {
  transition-property: color, background-color, border-color, box-shadow, opacity, transform;
  transition-duration: var(--duration-normal);
  transition-timing-function: var(--ease-out);
}

/* Animations — Keyframes */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fade-in var(--duration-normal) var(--ease-out) both;
}

.animate-fade-in-up {
  animation: fade-in-up var(--duration-slow) var(--ease-out) both;
}

.animate-scale-in {
  animation: scale-in var(--duration-normal) var(--ease-spring) both;
}

/* Animation Delays */
.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }
.delay-5 { animation-delay: 500ms; }

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ------------------------------------------------------------
   5. CARDS
   ------------------------------------------------------------ */

.card {
  background-color: var(--surface-1);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-flat {
  background-color: var(--surface-1);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.card-flat:hover {
  transform: none;
  box-shadow: none;
}

.card-glass {
  background: rgba(55, 53, 62, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.card-glass:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-subtle);
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
  margin-block: 0;
}

.card-body {
  color: var(--slate-fog);
  line-height: var(--leading-normal);
}

.card-body p:first-child {
  margin-top: 0;
}

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

.card-footer {
  padding-top: var(--space-4);
  margin-top: var(--space-4);
  border-top: var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}


/* ------------------------------------------------------------
   6. BUTTONS
   ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  line-height: 1;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn:focus-visible {
  outline: 2px solid var(--slate-accent);
  outline-offset: 2px;
}

/* Button Variants */
.btn-primary {
  background-color: var(--slate-accent);
  color: var(--slate-void);
}

.btn-primary:hover {
  background-color: var(--slate-accent-soft);
  color: var(--slate-void);
}

.btn-secondary {
  background-color: var(--surface-2);
  color: var(--slate-pearl);
}

.btn-secondary:hover {
  background-color: var(--surface-3);
  color: var(--slate-white);
}

.btn-ghost {
  background-color: transparent;
  color: var(--slate-mist);
}

.btn-ghost:hover {
  background-color: rgba(211, 218, 217, 0.08);
  color: var(--slate-pearl);
}

.btn-outline {
  background-color: transparent;
  color: var(--slate-accent);
  border-color: var(--slate-accent);
}

.btn-outline:hover {
  background-color: var(--slate-accent);
  color: var(--slate-void);
}

.btn-danger {
  background-color: var(--slate-danger);
  color: var(--slate-white);
}

.btn-danger:hover {
  background-color: #c96a6a;
  color: var(--slate-white);
}

/* Button Sizes */
.btn-xs {
  font-size: var(--text-xs);
  padding: 0.375rem 0.625rem;
  gap: var(--space-1);
}

.btn-sm {
  font-size: var(--text-xs);
  padding: 0.5rem 0.875rem;
  gap: var(--space-1);
}

.btn-lg {
  font-size: var(--text-base);
  padding: 0.75rem 1.5rem;
  gap: var(--space-3);
}

.btn-xl {
  font-size: var(--text-lg);
  padding: 1rem 2rem;
  gap: var(--space-3);
}

/* Icon Button */
.btn-icon {
  padding: 0.625rem;
  aspect-ratio: 1;
}

.btn-icon.btn-xs {
  padding: 0.375rem;
}

.btn-icon.btn-sm {
  padding: 0.5rem;
}

.btn-icon.btn-lg {
  padding: 0.75rem;
}

.btn-icon.btn-xl {
  padding: 1rem;
}

/* Button Group */
.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.btn-group .btn + .btn {
  border-left: 1px solid rgba(211, 218, 217, 0.15);
}


/* ------------------------------------------------------------
   7. FORMS
   ------------------------------------------------------------ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--slate-fog);
  letter-spacing: var(--tracking-wide);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--slate-pearl);
  background-color: var(--surface-1);
  border: var(--border-default);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--slate-ash);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--slate-accent);
  box-shadow: 0 0 0 3px rgba(194, 134, 107, 0.15);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235c5b66' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
}

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

/* Error States */
.form-input.is-error,
.form-select.is-error,
.form-textarea.is-error {
  border-color: var(--slate-danger);
}

.form-input.is-error:focus,
.form-select.is-error:focus,
.form-textarea.is-error:focus {
  box-shadow: 0 0 0 3px rgba(184, 92, 92, 0.2);
}

/* Hints and Errors */
.form-hint {
  font-size: var(--text-xs);
  color: var(--slate-ash);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--slate-danger);
}

/* Checkbox and Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background-color: var(--surface-1);
  border: var(--border-default);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.form-check input[type="checkbox"] {
  border-radius: var(--radius-sm);
}

.form-check input[type="radio"] {
  border-radius: var(--radius-full);
}

.form-check input[type="checkbox"]:checked {
  background-color: var(--slate-accent);
  border-color: var(--slate-accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%232a2831' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}

.form-check input[type="radio"]:checked {
  background-color: var(--slate-accent);
  border-color: var(--slate-accent);
  box-shadow: inset 0 0 0 3px var(--surface-1);
}

.form-check input:focus-visible {
  outline: 2px solid var(--slate-accent);
  outline-offset: 2px;
}

.form-check span {
  font-size: var(--text-sm);
  color: var(--slate-fog);
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.toggle input {
  appearance: none;
  position: relative;
  width: 44px;
  height: 24px;
  background-color: var(--surface-2);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.toggle input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: var(--slate-fog);
  border-radius: var(--radius-full);
  transition: transform var(--duration-fast) var(--ease-spring),
              background-color var(--duration-fast) var(--ease-out);
}

.toggle input:checked {
  background-color: var(--slate-accent);
}

.toggle input:checked::after {
  transform: translateX(20px);
  background-color: var(--slate-void);
}

.toggle input:focus-visible {
  outline: 2px solid var(--slate-accent);
  outline-offset: 2px;
}

.toggle span {
  font-size: var(--text-sm);
  color: var(--slate-fog);
}


/* ------------------------------------------------------------
   8. ALERTS
   ------------------------------------------------------------ */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--slate-ash);
  background-color: var(--surface-1);
  color: var(--slate-fog);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.alert + .alert {
  margin-top: var(--space-3);
}

.alert-info {
  border-left-color: var(--slate-info);
  background-color: rgba(107, 143, 163, 0.08);
  color: var(--slate-info);
}

.alert-success {
  border-left-color: var(--slate-success);
  background-color: rgba(110, 148, 119, 0.08);
  color: var(--slate-success);
}

.alert-warning {
  border-left-color: var(--slate-warning);
  background-color: rgba(194, 162, 78, 0.08);
  color: var(--slate-warning);
}

.alert-danger {
  border-left-color: var(--slate-danger);
  background-color: rgba(184, 92, 92, 0.08);
  color: var(--slate-danger);
}

.alert-title {
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
  color: var(--slate-pearl);
}

.alert-info .alert-title { color: var(--slate-info); }
.alert-success .alert-title { color: var(--slate-success); }
.alert-warning .alert-title { color: var(--slate-warning); }
.alert-danger .alert-title { color: var(--slate-danger); }


/* ------------------------------------------------------------
   9. PROGRESS, SPINNERS & SKELETONS
   ------------------------------------------------------------ */

/* Progress Bar */
.progress {
  width: 100%;
  height: 6px;
  background-color: var(--surface-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--slate-accent);
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

.progress-bar.success {
  background-color: var(--slate-success);
}

.progress-bar.warning {
  background-color: var(--slate-warning);
}

.progress-bar.danger {
  background-color: var(--slate-danger);
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid rgba(211, 218, 217, 0.15);
  border-top-color: var(--slate-accent);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

/* Skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-2) 25%,
    var(--surface-3) 50%,
    var(--surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
  color: transparent;
  user-select: none;
  pointer-events: none;
}

.skeleton::before,
.skeleton::after,
.skeleton * {
  visibility: hidden;
}