/* RLS Theme v0.3 — Anthropics-inspired calm surfaces
   Light-only, flat backgrounds, capsule CTAs, generous rhythm.
   Values remain human-editable. */

/* Box-sizing reset - prevents padding from exceeding viewport width */
*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  /* Colors */
  --color-bg:            #F5EEE6;   /* parchment base */
  --color-surface:       #FFFFFF;
  --color-surface-2:     #F0E4D6;   /* muted panels */
  --color-surface-contrast: #1A110B;
  --color-fg:            #20140C;   /* warm charcoal */
  --color-fg-muted:      #5A4633;
  --color-fg-subtle:     #90775D;

  --color-border:        #E4D6C7;
  --color-border-strong: #CFBDA9;

  /* Accents (Anthropic ember) */
  --color-accent:        #FF5B31;
  --color-accent-strong: #FF6B45;
  --color-accent-soft:   rgba(255, 91, 49, 0.12);
  --color-accent-fg:     #1B140E;

  /* Ink (Anthropic black CTAs) */
  --color-ink:           #14110D;
  --color-ink-fg:        #FFFFFF;

  /* Semantic */
  --color-success:       #2F7B43;
  --color-warning:       #A8721F;
  --color-danger:        #B7392C;

  /* Typography */
  --font-sans:           system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Inter", "Noto Sans", "Liberation Sans";
  --font-display:        "Inter", "Helvetica Neue", Arial, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif:          Georgia, "Times New Roman", Times, serif;
  --font-mono:           ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Type scale (px) */
  --text-xs: 13; --text-sm: 15; --text-base: 17; --text-lg: 20;
  --text-xl: 24; --text-2xl: 32; --text-3xl: 40; --text-4xl: 48;
  --text-5xl: 60; --text-6xl: 72;

  /* Line heights */
  --leading-tight: 1.12;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* Spacing (px) */
  --space-0: 0; --space-1: 2; --space-2: 8; --space-3: 12; --space-4: 20;
  --space-5: 28; --space-6: 36; --space-7: 48; --space-8: 64; --space-9: 88;
  --space-10: 120; --space-11: 160; --space-12: 200; --space-13: 240; --space-14: 300;

  /* Radii (px) */
  --radius-1: 8; --radius-2: 16; --radius-3: 28; --radius-4: 44;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-1: 0 10px 26px rgba(24, 17, 12, 0.08);
  --shadow-2: 0 32px 56px rgba(24, 17, 12, 0.12);

  /* Motion */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --dur-1: 140ms; --dur-2: 220ms; --dur-3: 360ms;

  /* Layout */
  --container-sm: 640px; --container-md: 768px; --container-lg: 1040px;
  --container-xl: 1280px; --container-2xl: 1440px;

  /* Hairline */
  --border-width: 1px;
}

/* Base */
:root { color-scheme: light; }
html {
  font-family: var(--font-sans);
  font-size: 16px;
  overflow-x: hidden;
}
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* Typography */
h1,h2,h3,h4,h5,h6 {
  line-height: var(--leading-tight);
  margin: 0 0 calc(var(--space-7)*1px) 0;
  letter-spacing: -0.014em;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-fg);
}
h1 { font-size: clamp(42px, 6vw, calc(var(--text-6xl)*1px)); }
h2 { font-size: clamp(34px, 4.8vw, calc(var(--text-5xl)*1px)); }
h3 { font-size: clamp(28px, 4vw, calc(var(--text-4xl)*1px)); }
h4 { font-size: calc(var(--text-3xl)*1px); }
h5 { font-size: calc(var(--text-2xl)*1px); }
h6 { font-size: calc(var(--text-xl)*1px); }

p, ul, ol {
  line-height: var(--leading-relaxed);
  margin: 0 0 calc(var(--space-6)*1px) 0;
  font-size: calc(var(--text-base)*1px);
  color: rgba(32, 20, 12, 0.82);
  max-width: 65ch;
}
small {
  font-size: calc(var(--text-sm)*1px);
  color: var(--color-fg-subtle);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-2) var(--ease-standard), color var(--dur-2) var(--ease-standard);
}
a:hover { border-bottom-color: rgba(20,17,13,0.2); color: var(--color-fg); }
a.accent { color: var(--color-accent); border-bottom-color: rgba(255,91,49,0.4); }
a.accent:hover { border-bottom-color: rgba(255,91,49,0.6); }

/* Utility text */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(227, 214, 196, 0.7);
  background: rgba(255, 255, 255, 0.65);
  font-size: calc(var(--text-xs)*1px);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(32, 22, 12, 0.68);
}

/* Surfaces */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius-3)*1px);
  padding: clamp(32px, 4vw, 48px);
  position: relative;
}
.card--muted { background: var(--color-surface-2); }
.card--raised { box-shadow: var(--shadow-1); }
.card--elevated { box-shadow: var(--shadow-2); }

/* Hairline separators */
.hr, hr { height: 1px; border: 0; background: var(--color-border); }

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(20,17,13,0.18);
  background: transparent;
  color: var(--color-fg);
  font-size: calc(var(--text-sm)*1px);
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: background-color var(--dur-2) var(--ease-standard), color var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard), transform var(--dur-1) var(--ease-standard);
}
.button:hover { border-color: rgba(20,17,13,0.28); transform: translateY(-1px); }
.button:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.button--primary {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-ink-fg);
}
.button--primary:hover { background: #0B0907; border-color: #0B0907; }
.button--ghost {
  background: transparent;
  border-color: rgba(20,17,13,0.2);
  color: rgba(20,17,13,0.78);
}
.button--ghost:hover { border-color: rgba(20,17,13,0.32); }
.button--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-fg);
}
.button--accent:hover { background: var(--color-accent-strong); border-color: var(--color-accent-strong); }

/* Forms */
.input, .select, .textarea {
  width: 100%;
  padding: 16px 18px;
  border-radius: calc(var(--radius-2)*1px);
  border: var(--border-width) solid rgba(205, 186, 164, 0.7);
  background: rgba(255, 255, 255, 0.78);
  color: var(--color-fg);
}
.input:focus, .select:focus, .textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Containers */
.container {
  width: 100%;
  margin-left: auto; margin-right: auto;
  padding-left: clamp(24px, 5vw, 56px);
  padding-right: clamp(24px, 5vw, 56px);
  max-width: var(--container-xl);
}
.container--lg { max-width: var(--container-2xl); }
.container--md { max-width: var(--container-lg); }

/* Layout helpers */
.stack-lg { display: flex; flex-direction: column; gap: calc(var(--space-7)*1px); }
.stack-xl { display: flex; flex-direction: column; gap: calc(var(--space-8)*1px); }
.grid-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}
.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: clamp(36px, 6vw, 64px);
  align-items: center;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-fg);
  transform: translateY(-150%);
  transition: transform var(--dur-2) var(--ease-standard);
  z-index: 100;
}
.skip-link:focus { transform: translateY(0); outline: 2px solid var(--color-accent); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}