/* MARCH AI — design tokens.
 * Single source of truth for colors, type, spacing, radii, shadow, motion.
 * Loaded first by every page (before _site.css).
 * NEVER hardcode the values defined here in .jsx or _site.css — always reference the variable.
 * See docs/DESIGN_SYSTEM.md for the full token reference.
 */

:root {
  /* ── Brand — cinematic warm palette ────────────────────────────────── */
  /* Inspired by warm commercial color grading: terracotta, cream, ink. */
  /* Pairs with Cormorant Garamond (display) + DM Sans (UI). */
  --march-ink:              #131210;  /* warm cinematic near-black */
  --march-ink-soft:         #1F1D19;  /* secondary dark surface */
  --march-cream:            #F5F1E8;  /* primary paper / warm white */
  --march-cream-2:          #EDE6D6;  /* alt cream for section breaks */
  --march-cream-3:          #E1D7BF;  /* deeper warm tone for cards */
  --march-terracotta:       #C8552E;  /* primary accent — CTA, links */
  --march-terracotta-hover: #A8431F;
  --march-terracotta-soft:  rgba(200, 85, 46, 0.10);
  --march-clay:             #8B5A3C;  /* secondary warm */
  --march-amber:            #D89953;  /* tertiary tint for highlights */

  /* ── Semantic surfaces ─────────────────────────────────────────────── */
  --march-bg:               var(--march-cream);
  --march-bg-alt:           var(--march-cream-2);
  --march-bg-dark:          var(--march-ink);
  --march-bg-dark-soft:     var(--march-ink-soft);
  --march-card:             #FFFFFF;
  --march-card-dark:        var(--march-ink-soft);

  /* ── Text ──────────────────────────────────────────────────────────── */
  --march-text:             #1A1916;  /* warm dark for body */
  --march-text-on-dark:     #F5F1E8;
  --march-text-2:           rgba(26, 25, 22, 0.68);
  --march-text-3:           rgba(26, 25, 22, 0.42);
  --march-text-on-accent:   #FFFFFF;

  /* legacy aliases (kept temporarily so existing JSX inline-styles don't break) */
  --march-accent:           var(--march-terracotta);
  --march-accent-hover:     var(--march-terracotta-hover);
  --march-accent-soft:      var(--march-terracotta-soft);

  /* ── Lines / dividers ──────────────────────────────────────────────── */
  --march-line:             rgba(26, 25, 22, 0.12);
  --march-line-strong:      rgba(26, 25, 22, 0.30);
  --march-line-on-dark:     rgba(245, 241, 232, 0.14);
  --march-line-on-dark-strong: rgba(245, 241, 232, 0.32);

  /* ── Glass ─────────────────────────────────────────────────────────── */
  --march-glass:            rgba(245, 241, 232, 0.78);
  --march-glass-dark:       rgba(19, 18, 16, 0.72);
  --march-glass-blur:       saturate(160%) blur(24px);
  --march-glass-border:     rgba(255, 255, 255, 0.6);
  --march-glass-shadow:     0 1px 0 rgba(26, 25, 22, 0.06);

  /* ── Semantic system ──────────────────────────────────────────────── */
  --march-success:          #2F7A4A;
  --march-warn:             #C77A1E;
  --march-error:            #B83A2C;
  --march-info:             #2A5B8B;

  /* ── Spacing scale (8px base) ──────────────────────────────────────── */
  --march-s-0:   0;
  --march-s-1:   4px;
  --march-s-2:   8px;
  --march-s-3:   12px;
  --march-s-4:   16px;
  --march-s-5:   20px;
  --march-s-6:   24px;
  --march-s-8:   32px;
  --march-s-10:  40px;
  --march-s-12:  48px;
  --march-s-16:  64px;
  --march-s-20:  80px;
  --march-s-24:  96px;
  --march-s-32:  128px;
  --march-s-40:  160px;

  /* ── Radii ─────────────────────────────────────────────────────────── */
  /* Editorial direction → sharper radii. 2/4/8 not 12/20/32. */
  --march-radius-sm:        2px;
  --march-radius:           4px;
  --march-radius-lg:        8px;
  --march-radius-xl:        16px;
  --march-radius-pill:      999px;
  --march-radius-circle:    50%;

  /* ── Elevation ─────────────────────────────────────────────────────── */
  --march-shadow-sm:        0 1px 2px rgba(26, 25, 22, 0.06);
  --march-shadow:           0 2px 8px rgba(26, 25, 22, 0.08);
  --march-shadow-lg:        0 12px 32px rgba(26, 25, 22, 0.14);
  --march-shadow-xl:        0 28px 64px rgba(26, 25, 22, 0.18);
  --march-shadow-float:     0 40px 100px rgba(26, 25, 22, 0.22);

  /* ── Motion ────────────────────────────────────────────────────────── */
  --march-ease:             cubic-bezier(0.22, 1, 0.36, 1);
  --march-ease-spring:      cubic-bezier(0.34, 1.56, 0.64, 1);
  --march-ease-in-out:      cubic-bezier(0.45, 0, 0.55, 1);
  --march-dur-fast:         150ms;
  --march-dur:              280ms;
  --march-dur-slow:         480ms;
  --march-dur-slower:       720ms;

  /* ── Typography — families ─────────────────────────────────────────── */
  --march-font-display:     "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --march-font-sans:        "DM Sans", -apple-system, BlinkMacSystemFont,
                            "Segoe UI", system-ui, "Helvetica Neue", sans-serif;
  --march-font-mono:        "JetBrains Mono", "SF Mono", Menlo, monospace;

  /* ── Weights ───────────────────────────────────────────────────────── */
  --march-w-regular:        400;
  --march-w-medium:         500;
  --march-w-semibold:       600;
  --march-w-bold:           700;
  --march-w-heavy:          800;
  /* Cormorant has a richer weight scale we exploit at display sizes */
  --march-w-display:        400;   /* default for Cormorant — looks lighter, more editorial */
  --march-w-display-strong: 500;

  /* ── Type sizes (mobile baseline) ──────────────────────────────────── */
  --march-t-display:        56px;
  --march-t-hero:           44px;
  --march-t-title:          32px;
  --march-t-title-2:        22px;
  --march-t-headline:       18px;
  --march-t-body:           16px;
  --march-t-body-lg:        18px;
  --march-t-caption:        13px;
  --march-t-overline:       11px;
  --march-t-number:         13px;   /* numeric labels — "001 / Hero" */

  /* ── Line heights ──────────────────────────────────────────────────── */
  --march-lh-tight:         0.95;
  --march-lh-display:       1.02;
  --march-lh-base:          1.2;
  --march-lh-relaxed:       1.5;
  --march-lh-loose:         1.7;

  /* ── Letter spacing ────────────────────────────────────────────────── */
  --march-ls-display:       -0.02em;
  --march-ls-tight:         -0.01em;
  --march-ls-normal:        0;
  --march-ls-wide:          0.04em;
  --march-ls-overline:      0.14em;
}

/* ── Type sizes — desktop scale-up ──────────────────────────────────── */
@media (min-width: 768px) {
  :root {
    --march-t-display:      88px;
    --march-t-hero:         68px;
    --march-t-title:        44px;
  }
}
@media (min-width: 1024px) {
  :root {
    --march-t-display:      128px;
    --march-t-hero:         88px;
    --march-t-title:        56px;
    --march-t-title-2:      28px;
    --march-t-headline:     20px;
    --march-t-body:         17px;
    --march-t-body-lg:      21px;
    --march-t-caption:      14px;
  }
}

/* ── Semantic type utility classes ──────────────────────────────────── */
.march-display {
  font-family: var(--march-font-display);
  font-size: var(--march-t-display);
  font-weight: var(--march-w-display);
  letter-spacing: var(--march-ls-display);
  line-height: var(--march-lh-display);
  color: var(--march-text);
  margin: 0;
}
.march-hero {
  font-family: var(--march-font-display);
  font-size: var(--march-t-hero);
  font-weight: var(--march-w-display);
  letter-spacing: var(--march-ls-display);
  line-height: var(--march-lh-display);
  color: var(--march-text);
  margin: 0;
}
.march-title {
  font-family: var(--march-font-display);
  font-size: var(--march-t-title);
  font-weight: var(--march-w-display);
  letter-spacing: var(--march-ls-tight);
  line-height: var(--march-lh-base);
  color: var(--march-text);
  margin: 0;
}
.march-title-2 {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-title-2);
  font-weight: var(--march-w-medium);
  letter-spacing: var(--march-ls-tight);
  line-height: var(--march-lh-base);
  color: var(--march-text);
  margin: 0;
}
.march-headline {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-headline);
  font-weight: var(--march-w-medium);
  color: var(--march-text);
  margin: 0;
}
.march-body {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-body);
  font-weight: var(--march-w-regular);
  color: var(--march-text);
  line-height: var(--march-lh-relaxed);
  margin: 0;
}
.march-body-lg {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-body-lg);
  font-weight: var(--march-w-regular);
  color: var(--march-text);
  line-height: var(--march-lh-relaxed);
  margin: 0;
}
.march-caption {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-caption);
  font-weight: var(--march-w-medium);
  color: var(--march-text-2);
  margin: 0;
}
.march-overline {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-overline);
  font-weight: var(--march-w-semibold);
  letter-spacing: var(--march-ls-overline);
  text-transform: uppercase;
  color: var(--march-text-2);
  margin: 0;
}
.march-number {
  font-family: var(--march-font-sans);
  font-size: var(--march-t-number);
  font-weight: var(--march-w-regular);
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.06em;
  color: var(--march-text-3);
}

.march-italic { font-style: italic; }

/* ── Glass surface mixin ────────────────────────────────────────────── */
.march-glass {
  background: var(--march-glass);
  backdrop-filter: var(--march-glass-blur);
  -webkit-backdrop-filter: var(--march-glass-blur);
  border-bottom: 1px solid var(--march-line);
  box-shadow: var(--march-glass-shadow);
}

/* ── Reduced motion ─────────────────────────────────────────────────── */
@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;
  }
}

/* ── Body defaults ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--march-font-sans);
  font-size: var(--march-t-body);
  color: var(--march-text);
  background: var(--march-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--march-terracotta);
  outline-offset: 3px;
  border-radius: var(--march-radius);
}

/* ── Selection ──────────────────────────────────────────────────────── */
::selection {
  background: var(--march-terracotta);
  color: var(--march-text-on-accent);
}