/* =====================================================================
   Looking for Jiu-Jitsu — Colors & Type
   ---------------------------------------------------------------------
   Premium BJJ training notebook brand. Editorial restraint,
   Moleskine-inspired warmth, collector's-object aesthetic.
   ===================================================================== */

/* Webfonts ----------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=Inter:wght@200;300;400;500&display=swap');

:root {
  /* -------------------------------------------------------------------
     COLOR — Paper & Ink
     ------------------------------------------------------------------- */
  --paper:           #faf9f6;  /* primary surface — warm off-white */
  --paper-deep:      #f4f2ec;  /* secondary surface, edges of pages */
  --paper-shadow:    #ebe8e0;  /* subtle inset, page gutter */
  --ink:             #0a0a0a;  /* primary type, primary buttons */
  --ink-soft:        #1a1a1a;  /* hover/press on ink surfaces */
  --ink-muted:       #4a4845;  /* secondary type */
  --ink-faint:       #8a857c;  /* tertiary type, captions */
  --ink-line:        #c9c4b8;  /* hairlines, dividers (0.5px borders) */
  --ink-line-soft:   #e3dfd4;  /* subtler hairlines on cards */

  /* -------------------------------------------------------------------
     COLOR — Belt Hierarchy (volume / edition accents only)
     Used as a single accent stripe per volume — never decoration.
     ------------------------------------------------------------------- */
  --belt-white:    #f5f3ec;
  --belt-blue:     #1e3a5f;
  --belt-purple:   #3a2456;
  --belt-brown:    #3d2817;
  --belt-black:    #0a0a0a;
  --belt-stripe:   #b8001f;  /* the red stripe on every belt tip */

  /* -------------------------------------------------------------------
     SEMANTIC
     ------------------------------------------------------------------- */
  --bg:              var(--paper);
  --bg-alt:          var(--paper-deep);
  --bg-inverse:      var(--ink);

  --fg:              var(--ink);
  --fg-soft:         var(--ink-muted);
  --fg-faint:        var(--ink-faint);
  --fg-inverse:      var(--paper);

  --border:          var(--ink-line);
  --border-soft:     var(--ink-line-soft);
  --border-strong:   var(--ink);

  --accent:          var(--ink);          /* default accent is ink */
  --accent-volume:   var(--belt-blue);    /* override per volume */

  /* -------------------------------------------------------------------
     TYPE — Families
     ------------------------------------------------------------------- */
  --font-display: "Cormorant Garamond", "EB Garamond", Garamond, Georgia, serif;
  --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;

  /* -------------------------------------------------------------------
     TYPE — Scale (collector-print scale; generous, restrained)
     ------------------------------------------------------------------- */
  --fs-display:   clamp(56px, 8vw, 112px);
  --fs-h1:        clamp(40px, 5vw, 72px);
  --fs-h2:        clamp(28px, 3.4vw, 48px);
  --fs-h3:        24px;
  --fs-h4:        18px;
  --fs-body:      15px;
  --fs-body-sm:   13px;
  --fs-caption:   11px;
  --fs-eyebrow:   10px;

  --lh-tight:     1.05;
  --lh-snug:      1.2;
  --lh-normal:    1.5;
  --lh-relaxed:   1.7;

  --tracking-display:  -0.01em;
  --tracking-tight:    -0.005em;
  --tracking-normal:   0;
  --tracking-wide:     0.08em;
  --tracking-eyebrow:  0.22em;  /* small caps eyebrows */

  --weight-display:   300;   /* italic serif headlines */
  --weight-body:      300;   /* Inter Light */
  --weight-body-em:   400;
  --weight-strong:    500;

  /* -------------------------------------------------------------------
     SPACING — generous, editorial
     ------------------------------------------------------------------- */
  --space-1:   4px;
  --space-2:   8px;
  --space-3:   12px;
  --space-4:   16px;
  --space-5:   24px;
  --space-6:   32px;
  --space-7:   48px;
  --space-8:   64px;
  --space-9:   96px;
  --space-10:  144px;
  --space-11:  192px;

  --gutter:    48px;
  --column:    72px;

  /* -------------------------------------------------------------------
     LAYOUT
     ------------------------------------------------------------------- */
  --measure:        62ch;     /* readable line length */
  --max-content:    1280px;
  --max-narrow:     720px;
  --max-prose:      640px;

  /* -------------------------------------------------------------------
     BORDERS — hairline-first
     ------------------------------------------------------------------- */
  --hairline:    0.5px solid var(--border);
  --hairline-soft: 0.5px solid var(--border-soft);
  --line-1:      1px solid var(--border-strong);

  /* No rounded corners on buttons/cards. Notebooks have square corners. */
  --radius-0:     0;
  --radius-sm:    1px;   /* effectively none — used sparingly */

  /* -------------------------------------------------------------------
     SHADOWS — almost never used. Paper sits flat.
     ------------------------------------------------------------------- */
  --shadow-none:   none;
  --shadow-page:   0 1px 0 rgba(10,10,10,0.04), 0 12px 28px -18px rgba(10,10,10,0.18);
  --shadow-volume: 0 24px 48px -28px rgba(10,10,10,0.35), 0 2px 0 rgba(10,10,10,0.06);

  /* -------------------------------------------------------------------
     MOTION — restrained, slow, ink-like
     ------------------------------------------------------------------- */
  --ease-ink:      cubic-bezier(0.2, 0.0, 0.0, 1.0);
  --ease-paper:    cubic-bezier(0.4, 0.0, 0.2, 1.0);
  --dur-quick:     180ms;
  --dur-base:      320ms;
  --dur-slow:      560ms;
}

/* =====================================================================
   SEMANTIC ROLES — element defaults
   Apply by including this stylesheet; element selectors below carry
   the brand voice. Override only when intentional.
   ===================================================================== */

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  letter-spacing: var(--tracking-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Display / H1 — italic Cormorant, generous leading */
.display, h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--weight-display);
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  color: var(--fg);
  margin: 0;
}

h1 { font-size: var(--fs-h1); }

h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--weight-display);
  font-size: var(--fs-h2);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

h3 {
  font-family: var(--font-body);
  font-weight: var(--weight-body-em);
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-normal);
  margin: 0;
}

h4 {
  font-family: var(--font-body);
  font-weight: var(--weight-strong);
  font-size: var(--fs-h4);
  line-height: var(--lh-snug);
  margin: 0;
}

p {
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  color: var(--fg-soft);
  margin: 0 0 var(--space-4) 0;
  max-width: var(--measure);
  text-wrap: pretty;
}

/* Eyebrow — small caps, wide tracking, used above titles */
.eyebrow {
  font-family: var(--font-body);
  font-weight: var(--weight-strong);
  font-size: var(--fs-eyebrow);
  line-height: 1;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--fg-faint);
}

/* Caption — for image captions, page numbers, footnotes */
.caption {
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  font-size: var(--fs-caption);
  line-height: var(--lh-normal);
  letter-spacing: 0.02em;
  color: var(--fg-faint);
}

/* Pull quote — italic display */
.pull-quote, blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--weight-display);
  font-size: var(--fs-h2);
  line-height: var(--lh-snug);
  color: var(--fg);
  border: none;
  padding: 0;
  margin: var(--space-7) 0;
}

/* Editorial number — for volume markers, page numbers */
.editorial-number {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--weight-display);
  font-size: var(--fs-h1);
  line-height: 1;
  color: var(--fg);
}

code, pre, .mono {
  font-family: var(--font-mono);
  font-size: var(--fs-body-sm);
  letter-spacing: 0;
}

/* Links — underlined, ink, no color shift */
a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 0.5px;
  text-underline-offset: 4px;
  transition: opacity var(--dur-quick) var(--ease-ink);
}
a:hover { opacity: 0.6; }

hr {
  border: none;
  border-top: var(--hairline);
  margin: var(--space-7) 0;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}