/* ============================================================
   BAKAC — Brand CSS  v2
   1.  Brand Tokens
   2.  Hard Reset
   3.  Typography Scale
   4.  Typography Utilities
   5.  Layout Utilities
   6.  Button System
   7.  Reveal Animation
   8.  Navigation
   9.  Hero
   10. About
   11. Work + Writing Teaser
   12. Contact
   13. Footer · Mobile · Sub-page elements
   ============================================================ */

/* ── 1. Brand Tokens ─────────────────────────────────────── */
:root {
  /* Core palette */
  --ink:        #0F0F0E;
  --paper:      #F2EDE3;
  --copper:     #C85C28;
  --copper-l:   #D97444;
  --copper-d:   #A04822;
  --copper-20:  rgba(200, 92, 40, 0.20);
  --copper-08:  rgba(200, 92, 40, 0.08);
  --stone:      #8B7E73;
  --fog:        #E8E2D9;
  --steel:      #3A4048;
  --chrome:     #1A1A17;
  --chrome-2:   #1E1E1A;

  /* Legacy aliases — kept for sub-page inline styles until migrated */
  --ink-soft:   #1A1A17;
  --paper-alt:  var(--fog);
  --copper-dim: var(--copper-d);

  /* Typography */
  --font-display: 'Syne', 'Georgia', serif;
  --font-body:    'DM Sans', 'Helvetica Neue', sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  /* Spacing scale */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  2rem;
  --sp-lg:  4rem;
  --sp-xl:  8rem;

  /* Layout */
  --max-content: 1200px;
  --max-prose:   640px;
  --radius-none: 0;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-std:  0.30s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── 2. Hard Reset ────────────────────────────────────────── */
*, ::before, ::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--ink);
  background: var(--ink);
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--copper-d); }
::-webkit-scrollbar-thumb:hover { background: var(--copper); }

/* ── 3. Typography Scale ──────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 10vw, 9rem); }
h2 { font-size: clamp(2rem, 5vw, 4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1rem, 1.5vw, 1.2rem); font-weight: 700; }

p {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.7;
  font-weight: 300;
}

/* Kept: used across multiple pages */
.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ── 4. Typography Utilities ─────────────────────────────── */
.t-display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.02em;
}
.t-h1 { font-size: clamp(3rem, 10vw, 9rem); }
.t-h2 { font-size: clamp(2rem, 5vw, 4rem); }
.t-h3 { font-size: clamp(1.2rem, 2.5vw, 1.75rem); }
.t-body-l { font-size: clamp(1.1rem, 1.8vw, 1.25rem); line-height: 1.65; }
.t-body    { font-size: clamp(1rem, 1.4vw, 1.125rem); line-height: 1.7; }
.t-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}
.t-label-stone { color: var(--stone); }
.t-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.t-small { font-size: 0.75rem; }

/* ── 5. Layout Utilities ─────────────────────────────────── */
.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 3rem;
}

.container-prose {
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: 0 3rem;
}

.section-pad    { padding: var(--sp-xl) 3rem; }
.section-pad-sm { padding: var(--sp-lg) 3rem; }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 1rem;
}

.section-eyebrow.on-dark {
  color: var(--stone);
}

.copper-rule {
  width: 48px;
  height: 3px;
  background: var(--copper);
  margin: 2rem 0;
}

/* ── 6. Button System ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 1rem 2rem;
  cursor: pointer;
  transition:
    background var(--transition-std),
    color var(--transition-std),
    border-color var(--transition-std),
    transform var(--transition-std);
}

.btn-primary {
  color: var(--paper);
  background: var(--copper);
}
.btn-primary:hover {
  background: var(--copper-l);
  transform: translateX(4px);
}

.btn-secondary {
  color: var(--fog);
  background: transparent;
  border: 1px solid var(--stone);
}
.btn-secondary:hover {
  border-color: var(--copper);
  color: var(--copper);
}

.btn-ghost {
  color: var(--copper);
  background: transparent;
  padding-left: 0;
}
.btn-ghost:hover {
  color: var(--copper-l);
}

/* ── 7. Reveal Animation ─────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Stagger: children animate sequentially when parent gets .visible */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.12s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.19s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.26s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(n+5) { transition-delay: 0.33s; opacity: 1; transform: translateY(0); }

/* ── 8. Navigation ─────────────────────────────────────────── */
nav.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  transition:
    background var(--transition-std),
    border-bottom var(--transition-std);
}

nav.site-nav.scrolled {
  background: var(--ink);
  border-bottom: 1px solid var(--chrome);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  transition: color var(--transition-fast);
}

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

.nav-link.nav-cta {
  border: 1px solid var(--stone);
  padding: 0.4rem 1rem;
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast);
}
.nav-link.nav-cta:hover {
  border-color: var(--copper);
  color: var(--copper);
}

/* ── 9. Hero ───────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  background: var(--ink);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

#arc-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 3rem 6rem;
  max-width: var(--max-content);
  width: 100%;
}

.hero-eyebrow {
  color: var(--copper);
  margin-bottom: 1.5rem;
}

.hero-name {
  color: var(--paper);
  line-height: 0.95;
  margin-bottom: 2rem;
}

.hero-name em {
  font-style: normal;
  color: var(--copper);
}

.hero-bio {
  color: var(--fog);
  max-width: 520px;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.hero-rule {
  position: absolute;
  bottom: 3.25rem;
  left: 3rem;
  right: 3rem;
  height: 1px;
  background: var(--chrome);
  z-index: 2;
}

.hero-meta-left {
  position: absolute;
  bottom: 1.25rem;
  left: 3rem;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}

.hero-meta-right {
  position: absolute;
  bottom: 1.125rem;
  right: 3rem;
  z-index: 3;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.hero-venture {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}

/* ── 10. About ─────────────────────────────────────────────── */
#about {
  background: var(--paper);
  padding: var(--sp-xl) 3rem;
}

.about-grid {
  max-width: var(--max-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
  align-items: start;
}

.about-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--stone);
  display: block;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.about-left h2 {
  color: var(--ink);
  line-height: 1.05;
}

.about-right p {
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.about-right p:last-of-type { margin-bottom: 0; }

.about-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  border: 1px solid var(--fog);
  padding: 0.4rem 0.8rem;
  background: var(--fog);
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.skill-tag:hover {
  border-color: var(--copper);
  color: var(--copper);
}

/* ── 11. Work + Writing Teaser ─────────────────────────────── */
#work {
  background: var(--ink);
  padding: var(--sp-xl) 3rem;
}

#writing {
  background: var(--ink);
  padding: var(--sp-xl) 3rem;
}

.work-header {
  max-width: var(--max-content);
  margin: 0 auto 4rem;
}

.work-header h2 { color: var(--paper); }

.work-grid {
  max-width: var(--max-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.project-card {
  background: var(--chrome);
  padding: 3rem;
  border-left: 3px solid transparent;
  transition:
    border-color var(--transition-std),
    background var(--transition-std);
  cursor: default;
}

.project-card:hover {
  border-left-color: var(--copper);
  background: var(--chrome-2);
}

.project-eyebrow {
  color: var(--copper);
  margin-bottom: 1.25rem;
}

.project-title {
  color: var(--paper);
  margin-bottom: 1rem;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
}

.project-body {
  color: var(--stone);
  font-size: 0.95rem;
  line-height: 1.65;
}

.project-sub {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--chrome-2);
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.project-sub span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper);
  transition: color var(--transition-fast);
}

.project-link:hover { color: var(--copper-l); }

.writing-all-link {
  text-align: center;
  margin-top: 3rem;
}

.writing-all-link a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  transition: color var(--transition-fast);
}

.writing-all-link a:hover { color: var(--copper-l); }

/* ── 12. Contact ───────────────────────────────────────────── */
#contact {
  background: var(--paper);
  padding: var(--sp-xl) 3rem;
}

.contact-inner {
  max-width: var(--max-prose);
  margin: 0 auto;
}

.contact-inner .work-header {
  margin-bottom: 3rem;
  max-width: none;
}

.contact-inner .work-header h2 {
  color: var(--ink);
}

.form-field {
  margin-bottom: 1.5rem;
}

.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 0.6rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  background: var(--fog);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 300;
  padding: 0.9rem 1rem;
  border: 1px solid var(--fog);
  border-radius: var(--radius-none);
  transition: border-color var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--copper);
  outline: none;
}

.form-field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-hidden { display: none; }

.form-submit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink);
  padding: 1rem 2.5rem;
  cursor: pointer;
  border-radius: var(--radius-none);
  transition: background var(--transition-std);
  width: 100%;
  margin-top: 0.5rem;
}

.form-submit:hover { background: var(--copper); }

.form-success {
  display: none;
  background: var(--fog);
  border-left: 3px solid var(--copper);
  padding: 1.5rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--stone);
  text-transform: uppercase;
}
.form-success.visible { display: block; }

.contact-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin-top: 3rem;
}

.contact-meta-cell {
  background: var(--fog);
  padding: 1.5rem;
}

.contact-meta-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
  display: block;
  margin-bottom: 0.5rem;
}

.contact-meta-value {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  font-weight: 400;
  display: block;
}

.contact-meta-value a {
  color: var(--ink);
  transition: color var(--transition-fast);
}

.contact-meta-value a:hover { color: var(--copper); }

/* ── 13. Footer · Mobile · Sub-page elements ───────────────── */
footer.site-footer {
  background: var(--ink);
  padding: 2.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--chrome);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--fog);
}

.footer-email {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.footer-email:hover { color: var(--copper); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
}

/* Mobile */
@media (max-width: 768px) {
  nav.site-nav { padding: 1.25rem 1.5rem; }

  #hero { align-items: flex-end; }
  .hero-content { padding: 0 1.5rem 4rem; }
  .hero-rule,
  .hero-meta-left,
  .hero-meta-right { display: none; }

  #about   { padding: var(--sp-lg) 1.5rem; }
  #work    { padding: var(--sp-lg) 1.5rem; }
  #writing { padding: var(--sp-lg) 1.5rem; }
  #contact { padding: var(--sp-lg) 1.5rem; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .work-grid {
    grid-template-columns: 1fr;
  }

  .contact-meta {
    grid-template-columns: 1fr;
  }

  footer.site-footer {
    padding: 2rem 1.5rem;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  h1 { font-size: clamp(2.5rem, 14vw, 5rem); }
}

/* Reading progress bar — used by writing posts */
.reading-progress {
  position: fixed; top: 0; left: 0;
  width: 0%; height: 2px;
  background: var(--copper); z-index: 200;
  transition: width .1s linear;
}

/* Post body typography — used by writing posts */
.post-body {
  max-width: 640px;
  margin: 0 auto;
  padding: 64px 24px 80px;
  color: var(--steel);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
}
.post-body h2 { font-family: var(--font-display); font-weight: 700; font-size: 26px;
  color: var(--ink); margin: 48px 0 16px; }
.post-body h3 { font-family: var(--font-display); font-weight: 600; font-size: 20px;
  color: var(--ink); margin: 36px 0 12px; }
.post-body p { margin-bottom: 24px; }
.post-body blockquote { border-left: 3px solid var(--copper); margin: 32px 0;
  padding: 12px 24px; font-style: italic; color: var(--stone); }
.post-body strong { font-weight: 500; color: var(--ink); }
.post-body a { color: var(--copper); text-decoration: none;
  border-bottom: 1px solid var(--copper-20); }
.post-body a:hover { border-bottom-color: var(--copper); }

/* Light mode stub — populated in Phase 3 */
[data-theme="light"] { }