/* ==========================================================================
   AnswerShape — Base Stylesheet
   Design tokens: fluid type, 4px spacing, custom palette (indigo + amber)
   ========================================================================== */

:root,
[data-theme='light'] {
  /* Surfaces — near-white with a hint of warmth */
  --color-bg: #fafaf7;
  --color-surface: #ffffff;
  --color-surface-2: #f4f3ee;
  --color-surface-offset: #ecebe4;
  --color-divider: #e2e1da;
  --color-border: #d4d3ca;

  /* Text */
  --color-text: #17181c;
  --color-text-muted: #5b5c66;
  --color-text-faint: #9a9ba3;
  --color-text-inverse: #fafaf7;

  /* Primary — deep indigo */
  --color-primary: #2d2b6b;
  --color-primary-hover: #201e52;
  --color-primary-active: #16143d;
  --color-primary-highlight: #dcdbf0;

  /* Accent — warm amber (used sparingly for CTAs / highlights) */
  --color-accent: #d97706;
  --color-accent-hover: #b45309;
  --color-accent-highlight: #fef3c7;

  /* Semantic */
  --color-success: #15803d;
  --color-warning: #b45309;
  --color-error: #b91c1c;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows — subtle, warm-tinted */
  --shadow-sm: 0 1px 2px rgba(23, 24, 28, 0.05);
  --shadow-md: 0 4px 12px rgba(23, 24, 28, 0.06), 0 1px 3px rgba(23, 24, 28, 0.04);
  --shadow-lg: 0 12px 32px rgba(23, 24, 28, 0.08), 0 4px 12px rgba(23, 24, 28, 0.04);
  --shadow-xl: 0 24px 48px rgba(23, 24, 28, 0.10);

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Type scale (fluid) */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 1rem + 6vw, 6.5rem);

  /* Spacing (4px base) */
  --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;
  --space-32: 8rem;

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;
  --content-full:    100%;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:    'Satoshi', 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Menlo', monospace;
}

[data-theme='dark'] {
  --color-bg: #0e0f12;
  --color-surface: #16181d;
  --color-surface-2: #1c1f26;
  --color-surface-offset: #232630;
  --color-divider: #2a2d38;
  --color-border: #363946;

  --color-text: #ececef;
  --color-text-muted: #9a9ba3;
  --color-text-faint: #5b5c66;
  --color-text-inverse: #17181c;

  --color-primary: #8b88e0;
  --color-primary-hover: #a5a3ea;
  --color-primary-active: #b8b6f0;
  --color-primary-highlight: #2a2861;

  --color-accent: #fbbf24;
  --color-accent-hover: #fcd34d;
  --color-accent-highlight: #3d2e0a;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.6);
}

/* System-preference fallback for users who haven't toggled */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e0f12;
    --color-surface: #16181d;
    --color-surface-2: #1c1f26;
    --color-surface-offset: #232630;
    --color-divider: #2a2d38;
    --color-border: #363946;
    --color-text: #ececef;
    --color-text-muted: #9a9ba3;
    --color-text-faint: #5b5c66;
    --color-text-inverse: #17181c;
    --color-primary: #8b88e0;
    --color-primary-hover: #a5a3ea;
    --color-primary-active: #b8b6f0;
    --color-primary-highlight: #2a2861;
    --color-accent: #fbbf24;
    --color-accent-hover: #fcd34d;
    --color-accent-highlight: #3d2e0a;
  }
}

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

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

ul[role='list'], ol[role='list'] {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

a:hover {
  color: var(--color-primary-hover);
}

::selection {
  background: var(--color-primary-highlight);
  color: var(--color-text);
}

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

@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;
  }
}

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

.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;
}

a, button, [role='button'], input, textarea, select {
  transition:
    color var(--transition-interactive),
    background-color var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}