/* ============================================================================
 * cr-common.css
 *
 * Shared design system for the Correlating Resonance phase pages
 * (gioiaie/sanzognie/corres/pluralitie). The four HTML files load this
 * before their own page-specific <style> block, so any rule defined here
 * may be overridden inline per page.
 *
 * Scope:
 *   1. Design tokens (:root variables)
 *   2. Base reset and body
 *   3. Page header and navigation (top)
 *   4. Phase navigation strip
 *   5. Bottom navigation
 *   6. Workspace container
 *   7. Shared components: callout, error/warning/info/success boxes,
 *      buttons, headings
 *
 * Out of scope (kept inline per page):
 *   - Upload grids and zones (vary materially by phase)
 *   - Results tables, pipeline visualisations, plotting
 *   - Phase-specific colour additions (e.g. --new-concept in Phase 2)
 * ============================================================================ */


/* ── 1. Design tokens ────────────────────────────────────────────────────── */

:root {
  /* Ink / paper neutrals */
  --ink:           #1a1814;
  --ink-mid:       #4a4640;
  --ink-light:     #9a9490;
  --paper:         #f7f4ef;
  --paper-mid:     #ede9e2;
  --paper-dark:    #ddd8cf;
  --rule:          #d0cbc2;

  /* Accent (terracotta) */
  --accent:        #8b3a2a;
  --accent-light:  #c4735f;

  /* Status colours */
  --success:        #2a6b4a;
  --success-bg:     #f0f7f3;
  --success-border: #b8d9c8;

  --warning:        #7a5c1a;
  --warning-bg:     #fdf5e0;
  --warning-border: #e8d090;

  /* Typography */
  --mono:  'JetBrains Mono', monospace;
  --serif: 'Spectral', Georgia, serif;
  --sans:  'Barlow', sans-serif;

  /* Component hooks
     Phases override these in their own <style> block if they vary from the
     default. The phase-tag background alternates ink/accent across the four
     phases; rather than encoding that here, each page sets its own value. */
  --phase-tag-bg: var(--ink);
}


/* ── 2. Base reset and body ──────────────────────────────────────────────── */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background:  var(--paper);
  color:       var(--ink);
  font-family: var(--sans);
  font-size:   15px;
  line-height: 1.6;
  min-height:  100vh;
}


/* ── 3. Page header and navigation (top) ─────────────────────────────────── */

header {
  border-bottom: 2px solid var(--ink);
  padding: 1.75rem 3rem 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 2rem;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--serif);
  font-weight: 300;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.logo em { font-style: italic; color: var(--accent); }

.phase-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--phase-tag-bg);   /* overridable per phase */
  padding: 0.25rem 0.65rem;
  border-radius: 2px;
}

.nav-link {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.nav-link:hover { color: var(--accent); border-color: var(--accent); }

/* Some pages use multiple top-right nav links instead of a single one. */
.nav-links {
  margin-left: auto;
  display: flex;
  gap: 1.5rem;
}

.nav-links .nav-link {
  margin-left: 0;
  font-size: 0.65rem;
}


/* ── 4. Phase navigation strip (cr-phases) ───────────────────────────────── */

.cr-phases {
  display: flex;
  align-items: center;
  gap: 0;
}

.cr-phase-link {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--paper-dark);
  border-right: none;
  color: var(--ink-light);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.cr-phase-link:first-child { border-radius: 3px 0 0 3px; }

.cr-phase-link:last-child {
  border-right: 1px solid var(--paper-dark);
  border-radius: 0 3px 3px 0;
}

.cr-phase-link:hover { background: var(--paper-mid); color: var(--ink); }

.cr-phase-link.current {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.cr-nav-home {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-light);
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.cr-nav-home:hover { color: var(--accent); border-color: var(--accent); }


/* ── 5. Bottom navigation (cr-bottom-nav) ────────────────────────────────── */

.cr-bottom-nav {
  border-top: 1px solid var(--rule);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 3rem;
  background: white;
}

.cr-bottom-btn {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-mid);
  padding: 0.5rem 1rem;
  border: 1px solid var(--paper-dark);
  border-radius: 3px;
  transition: all 0.15s;
}

.cr-bottom-btn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.cr-bottom-btn.ghost {
  opacity: 0.25;
  pointer-events: none;
}


/* ── 6. Workspace container ──────────────────────────────────────────────── */

/* The default container; pages may set a different max-width inline. */
.workspace {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 3rem;
}


/* ── 7. Shared components ────────────────────────────────────────────────── */

/* Status / error / warning / success boxes -------------------------------- */

.error-box {
  background: #fef2f2;
  border-left: 3px solid #c03030;
  padding: 0.85rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.85rem;
  color: #5a1010;
  font-family: var(--mono);
}

.error-box strong { display: block; margin-bottom: 0.25rem; }

.warning-box {
  background: var(--warning-bg);
  border-left: 3px solid var(--warning);
  padding: 0.85rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.85rem;
  color: var(--warning);
}

.success-box {
  background: var(--success-bg);
  border-left: 3px solid var(--success);
  padding: 0.85rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.85rem;
  color: var(--success);
}

.info-box {
  background: var(--paper-mid);
  border-left: 3px solid var(--ink-mid);
  padding: 0.85rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.85rem;
  color: var(--ink-mid);
}

/* Buttons ----------------------------------------------------------------- */

.btn-primary {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 1.4rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn-primary:hover:not(:disabled) { background: var(--accent); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.55rem 1.1rem;
  background: white;
  color: var(--ink-mid);
  border: 1px solid var(--paper-dark);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-secondary:hover {
  background: var(--paper-mid);
  color: var(--ink);
}

/* Section headings -------------------------------------------------------- */

.section-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.section-title {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.8rem;
}

.section-intro {
  font-size: 0.9rem;
  color: var(--ink-mid);
  margin-bottom: 1.2rem;
  max-width: 60ch;
}
  .nav-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 4rem 3rem;
    position: relative;
    z-index: 2;
    max-width: 900px;
  }

  .nav-eyebrow {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.1rem;
  }

  .nav-eyebrow::before {
    content: '';
    width: 2rem;
    height: 1px;
    color:#5a1010;
    background: var(--accent);
  }

  .nav-title {
    font-family: var(--cond);
    font-weight: 300;
    font-size: clamp(2.5rem, 6vw, 4rem);
    line-height: 0.95;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 0.0em;
  }

  .nav-title em {
    font-style: italic;
    font-weight: 300;
    color: var(--accent);
  }

  .nav-subtitle {
    font-family: var(--cond);
    font-weight: 200;
    font-size: clamp(1rem, 3vw, 1.4rem);
    color: var(--ink-mid);
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
    font-style: italic;
  }

  .nav-description {
    font-size: 1.05rem;
    color: var(--ink-mid);
    max-width: 640px;
    line-height: 1.75;
    margin-bottom: 3rem;
  }