/* ═══════════════════════════════════════════════════════════════
   TriadicFrameworks · Shared Base Stylesheet
   triadic-base.css · v1.0.0
   Author: Nawder · Protocol: Metadata Refresh v1
   ═══════════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ─────────────────────────────────────────── */
:root {
  /* Colour palette */
  --tf-color-bg:            #0d0d0f;
  --tf-color-bg-surface:    #14141a;
  --tf-color-bg-card:       #1c1c24;
  --tf-color-border:        #2e2e3d;
  --tf-color-text:          #e8e8f0;
  --tf-color-text-muted:    #7b7b94;
  --tf-color-accent:        #7c6fef;
  --tf-color-accent-hover:  #9d93f4;
  --tf-color-accent-dim:    rgba(124, 111, 239, 0.15);

  /* Module-specific accent overrides (set per module) */
  --tf-module-color:        var(--tf-color-accent);
  --tf-module-color-dim:    var(--tf-color-accent-dim);

  /* Badge colours */
  --tf-badge-draft-bg:      rgba(220, 150, 50, 0.18);
  --tf-badge-draft-text:    #e0a84a;
  --tf-badge-live-bg:       rgba(70, 190, 130, 0.18);
  --tf-badge-live-text:     #46be82;

  /* Typography */
  --tf-font-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --tf-font-mono:   'JetBrains Mono', 'Fira Code', monospace;
  --tf-font-size-base: 1rem;
  --tf-font-size-sm:   0.875rem;
  --tf-font-size-xs:   0.75rem;
  --tf-font-size-lg:   1.125rem;
  --tf-font-size-xl:   1.5rem;
  --tf-font-size-2xl:  2rem;
  --tf-font-size-3xl:  2.75rem;
  --tf-line-height:    1.65;

  /* Spacing scale */
  --tf-space-1:   0.25rem;
  --tf-space-2:   0.5rem;
  --tf-space-3:   0.75rem;
  --tf-space-4:   1rem;
  --tf-space-6:   1.5rem;
  --tf-space-8:   2rem;
  --tf-space-12:  3rem;
  --tf-space-16:  4rem;
  --tf-space-24:  6rem;

  /* Layout */
  --tf-content-width: 72rem;
  --tf-content-padding: var(--tf-space-6);

  /* Radii */
  --tf-radius-sm:  0.25rem;
  --tf-radius-md:  0.5rem;
  --tf-radius-lg:  0.75rem;
  --tf-radius-pill: 999px;

  /* Shadows */
  --tf-shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --tf-shadow-md:  0 4px 12px rgba(0,0,0,0.5);
  --tf-shadow-glow: 0 0 18px var(--tf-module-color-dim);

  /* Transitions */
  --tf-transition: 180ms ease;
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--tf-font-sans);
  font-size: var(--tf-font-size-base);
  line-height: var(--tf-line-height);
  background-color: var(--tf-color-bg);
  color: var(--tf-color-text);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--tf-color-accent); text-decoration: none; transition: color var(--tf-transition); }
a:hover { color: var(--tf-color-accent-hover); }
ul, ol { list-style: none; }

/* ── SKIP LINK ──────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--tf-space-4);
  padding: var(--tf-space-2) var(--tf-space-4);
  background: var(--tf-color-accent);
  color: #fff;
  border-radius: var(--tf-radius-md);
  font-size: var(--tf-font-size-sm);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--tf-transition);
}
.skip-link:focus { top: var(--tf-space-4); }

/* ── LAYOUT WRAPPERS ────────────────────────────────────────── */
.tf-container {
  width: 100%;
  max-width: var(--tf-content-width);
  margin-inline: auto;
  padding-inline: var(--tf-content-padding);
}
.tf-main {
  flex: 1;
  padding-block: var(--tf-space-12);
}
.tf-main > .tf-section + .tf-section {
  margin-top: var(--tf-space-12);
}

/* ── HEADER & NAV ───────────────────────────────────────────── */
.tf-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--tf-color-bg);
  border-bottom: 1px solid var(--tf-color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.tf-nav {
  display: flex;
  align-items: center;
  gap: var(--tf-space-4);
  max-width: var(--tf-content-width);
  margin-inline: auto;
  padding: var(--tf-space-3) var(--tf-content-padding);
}
.tf-nav__home {
  font-size: var(--tf-font-size-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tf-color-text);
}
.tf-nav__home:hover { color: var(--tf-color-accent-hover); }

/* ── BREADCRUMB ─────────────────────────────────────────────── */
.tf-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--tf-space-2);
  font-size: var(--tf-font-size-xs);
  color: var(--tf-color-text-muted);
}
.tf-breadcrumb li + li::before {
  content: '/';
  margin-right: var(--tf-space-2);
  opacity: 0.4;
}
.tf-breadcrumb [aria-current="page"] {
  color: var(--tf-module-color);
  font-weight: 600;
}

/* ── MODULE HERO ────────────────────────────────────────────── */
.tf-module-hero {
  max-width: var(--tf-content-width);
  margin-inline: auto;
  padding: var(--tf-space-16) var(--tf-content-padding) var(--tf-space-8);
}
.tf-module-hero__badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--tf-space-2);
  margin-bottom: var(--tf-space-6);
}
.tf-module-hero__title {
  font-size: var(--tf-font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--tf-color-text);
  margin-bottom: var(--tf-space-4);
  line-height: 1.15;
}
.tf-module-hero__tagline {
  font-size: var(--tf-font-size-lg);
  color: var(--tf-color-text-muted);
  max-width: 48rem;
}

/* ── BADGES ─────────────────────────────────────────────────── */
.tf-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--tf-space-1);
  padding: var(--tf-space-1) var(--tf-space-3);
  border-radius: var(--tf-radius-pill);
  font-size: var(--tf-font-size-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  line-height: 1.5;
}
.tf-badge--module {
  background: var(--tf-module-color-dim);
  color: var(--tf-module-color);
  border-color: var(--tf-module-color);
}
.tf-badge--status.tf-badge--draft {
  background: var(--tf-badge-draft-bg);
  color: var(--tf-badge-draft-text);
  border-color: var(--tf-badge-draft-text);
}
.tf-badge--status.tf-badge--live {
  background: var(--tf-badge-live-bg);
  color: var(--tf-badge-live-text);
  border-color: var(--tf-badge-live-text);
}
.tf-badge--layer {
  background: rgba(255,255,255,0.05);
  color: var(--tf-color-text-muted);
  border-color: var(--tf-color-border);
}
.tf-badge--version {
  background: rgba(255,255,255,0.05);
  color: var(--tf-color-text-muted);
  border-color: var(--tf-color-border);
  font-family: var(--tf-font-mono);
}
.tf-badge__icon { font-size: 0.9em; line-height: 1; }

/* ── SESSION CONTEXT STRIP ──────────────────────────────────── */
.tf-session-context {
  max-width: var(--tf-content-width);
  margin-inline: auto;
  padding: var(--tf-space-3) var(--tf-content-padding);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--tf-space-2);
  font-size: var(--tf-font-size-xs);
  font-family: var(--tf-font-mono);
  color: var(--tf-color-text-muted);
  border-bottom: 1px solid var(--tf-color-border);
  background: rgba(124, 111, 239, 0.04);
}
.tf-session-context__user { color: var(--tf-module-color); font-weight: 700; }
.tf-session-context__divider { opacity: 0.3; }

/* ── SECTIONS ───────────────────────────────────────────────── */
.tf-section {
  max-width: var(--tf-content-width);
  margin-inline: auto;
  padding-inline: var(--tf-content-padding);
}
.tf-section__heading {
  font-size: var(--tf-font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--tf-color-text);
  margin-bottom: var(--tf-space-6);
  padding-bottom: var(--tf-space-3);
  border-bottom: 1px solid var(--tf-color-border);
  position: relative;
}
.tf-section__heading::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: var(--tf-module-color);
  border-radius: var(--tf-radius-pill);
}

/* ── CARDS ──────────────────────────────────────────────────── */
.tf-card {
  background: var(--tf-color-bg-card);
  border: 1px solid var(--tf-color-border);
  border-radius: var(--tf-radius-lg);
  padding: var(--tf-space-6);
  transition: border-color var(--tf-transition), box-shadow var(--tf-transition);
}
.tf-card:hover {
  border-color: var(--tf-module-color);
  box-shadow: var(--tf-shadow-glow);
}

/* ── TABLES ─────────────────────────────────────────────────── */
.tf-table-wrapper { overflow-x: auto; border-radius: var(--tf-radius-lg); border: 1px solid var(--tf-color-border); }
.tf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--tf-font-size-sm);
}
.tf-table th {
  background: var(--tf-color-bg-surface);
  color: var(--tf-color-text-muted);
  font-size: var(--tf-font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--tf-space-3) var(--tf-space-4);
  text-align: left;
  border-bottom: 1px solid var(--tf-color-border);
}
.tf-table td {
  padding: var(--tf-space-3) var(--tf-space-4);
  border-bottom: 1px solid var(--tf-color-border);
  vertical-align: top;
}
.tf-table tr:last-child td { border-bottom: none; }
.tf-table td:first-child { font-family: var(--tf-font-mono); font-size: var(--tf-font-size-xs); color: var(--tf-module-color); }
.tf-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ── CROSS-MODULE LINKS ─────────────────────────────────────── */
.tf-cross-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--tf-space-3);
}
.tf-cross-link {
  padding: var(--tf-space-2) var(--tf-space-5);
  border: 1px solid var(--tf-color-border);
  border-radius: var(--tf-radius-pill);
  font-size: var(--tf-font-size-sm);
  font-weight: 600;
  color: var(--tf-color-text-muted);
  transition: border-color var(--tf-transition), color var(--tf-transition);
}
.tf-cross-link:hover {
  border-color: var(--tf-module-color);
  color: var(--tf-module-color);
}

/* ── PLACEHOLDER STYLE ──────────────────────────────────────── */
.tf-placeholder {
  border: 1px dashed var(--tf-color-border);
  border-radius: var(--tf-radius-md);
  padding: var(--tf-space-4);
  color: var(--tf-color-text-muted);
  font-size: var(--tf-font-size-sm);
  font-style: italic;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 6px,
    rgba(255,255,255,0.015) 6px,
    rgba(255,255,255,0.015) 12px
  );
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.tf-footer {
  border-top: 1px solid var(--tf-color-border);
  padding: var(--tf-space-8) var(--tf-content-padding);
  text-align: center;
  font-size: var(--tf-font-size-xs);
  color: var(--tf-color-text-muted);
  display: flex;
  flex-direction: column;
  gap: var(--tf-space-2);
}
.tf-footer__meta { font-family: var(--tf-font-mono); opacity: 0.6; }

/* ── UTILITIES ──────────────────────────────────────────────── */
.tf-sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.tf-mono { font-family: var(--tf-font-mono); }
.tf-muted { color: var(--tf-color-text-muted); }

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  :root {
    --tf-content-padding: var(--tf-space-4);
    --tf-font-size-3xl: 2rem;
  }
  .tf-module-hero { padding-block-start: var(--tf-space-8); }
  .tf-nav { flex-wrap: wrap; gap: var(--tf-space-2); }
}

/* ── REDUCED MOTION ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0ms !important; }
  html { scroll-behavior: auto; }
}