/* ==========================================================================
   Workesi — Base Styles
   Design tokens, reset, and typography
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Primary (blue) */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Accent (teal) */
  --accent-50: #f0fdfa;
  --accent-100: #ccfbf1;
  --accent-300: #5eead4;
  --accent-500: #14b8a6;
  --accent-600: #0d9488;
  --accent-700: #0f766e;

  /* Success */
  --success-50: #f0fdf4;
  --success-100: #dcfce7;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --success-700: #15803d;

  /* Warning */
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-500: #f59e0b;
  --warning-600: #d97706;

  /* Error */
  --error-50: #fef2f2;
  --error-100: #fee2e2;
  --error-500: #ef4444;
  --error-600: #dc2626;
  --error-700: #b91c1c;

  /* Neutral (slate) */
  --neutral-0: #ffffff;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Semantic aliases */
  --bg: var(--neutral-0);
  --bg-soft: var(--neutral-50);
  --bg-muted: var(--neutral-100);
  --text: var(--neutral-900);
  --text-muted: var(--neutral-500);
  --text-subtle: var(--neutral-400);
  --border: var(--neutral-200);
  --border-strong: var(--neutral-300);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;

  /* Font sizes (modular scale) */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.25rem;
  --fs-5xl: 4rem;

  /* Line heights */
  --lh-tight: 1.2;
  --lh-snug: 1.35;
  --lh-normal: 1.5;
  --lh-relaxed: 1.625;
  --lh-loose: 1.8;

  /* Font weights */
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Spacing (8px system) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 2.5rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 5rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.1), 0 4px 8px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 24px 64px rgba(15, 23, 42, 0.14), 0 8px 16px rgba(15, 23, 42, 0.06);
  --shadow-primary: 0 8px 24px rgba(37, 99, 235, 0.28);

  /* Gradients */
  --gradient-hero: radial-gradient(
      ellipse 80% 60% at 50% 0%,
      var(--primary-50) 0%,
      transparent 70%
    );
  --gradient-primary: linear-gradient(
    135deg,
    var(--primary-600) 0%,
    var(--primary-500) 100%
  );
  --gradient-accent: linear-gradient(
    135deg,
    var(--primary-600) 0%,
    var(--accent-600) 100%
  );
  --gradient-text: linear-gradient(
    135deg,
    var(--primary-700) 0%,
    var(--accent-600) 100%
  );

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 540px;
  --header-height: 72px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 450ms;

  /* Z-index scale */
  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 200;
  --z-modal: 300;
}

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  list-style: none;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  line-height: var(--lh-tight);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  color: var(--neutral-900);
}

h1 {
  font-size: clamp(2.25rem, 5vw, var(--fs-5xl));
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, var(--fs-3xl));
  letter-spacing: -0.03em;
}

h3 {
  font-size: var(--fs-xl);
}

p {
  line-height: var(--lh-relaxed);
}

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

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Accessibility ---------- */
:focus-visible {
  outline: 3px solid var(--primary-400);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

/* ---------- Selection ---------- */
::selection {
  background: var(--primary-100);
  color: var(--primary-900);
}