/* =========================================================
   Djonathan Alfin · Porto — Dark Engineering theme
   ========================================================= */

:root {
  /* Palette */
  --bg: #0a0a0b;
  --bg-elev: #111114;
  --bg-card: #141418;
  --line: #1f1f24;
  --line-strong: #2a2a31;
  --text: #e6e6e8;
  --text-dim: #9a9aa3;
  --text-faint: #5e5e68;
  --accent: #34d399;       /* emerald (terminal) */
  --accent-soft: rgba(52, 211, 153, 0.12);
  --accent-line: rgba(52, 211, 153, 0.32);
  --warn: #fbbf24;
  --danger: #f87171;

  /* Type */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', 'Courier New', monospace;
  --font-display: 'Inter', sans-serif;

  /* Scale */
  --max-w: 720px;
  --max-w-wide: 1180px;
  --side-w: 460px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Light/minimalist alt theme (toggled via [data-theme="light"]) */
[data-theme="light"] {
  --bg: #fafaf9;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --line: #e7e5e4;
  --line-strong: #d6d3d1;
  --text: #1c1917;
  --text-dim: #57534e;
  --text-faint: #a8a29e;
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.10);
  --accent-line: rgba(15, 118, 110, 0.30);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11';
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; padding: 0; }
img { max-width: 100%; display: block; }

::selection { background: var(--accent-soft); color: var(--accent); }

/* Subtle grid backdrop — not loud */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at 30% 0%, #000 30%, transparent 70%);
}

/* =========================================================
   Layout shell — split: fixed left (intro+nav) / scroll right
   ========================================================= */
.shell {
  position: relative;
  z-index: 1;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: var(--side-w) 1fr;
  gap: 80px;
}
@media (max-width: 1024px) {
  .shell { grid-template-columns: 1fr; gap: 40px; padding: 0 28px; }
}

.side {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 96px 0 64px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
@media (max-width: 1024px) {
  .side { position: relative; height: auto; padding: 80px 0 24px; }
}

.main { padding: 96px 0 160px; min-width: 0; }
@media (max-width: 1024px) { .main { padding: 0 0 120px; } }

/* =========================================================
   Hero (side)
   ========================================================= */
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.hero-eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.4;} }

.hero-name {
  font-size: clamp(32px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 14px;
  color: var(--text);
  text-wrap: balance;
}
.hero-tag {
  font-size: 19px;
  font-weight: 500;
  color: var(--text);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.hero-sub {
  font-size: 15px;
  color: var(--text-dim);
  margin: 0 0 28px;
  max-width: 380px;
  text-wrap: pretty;
}

/* Side nav */
.side-nav { margin-top: 28px; }
.side-nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.side-nav a {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 6px 0;
  transition: color 0.2s var(--ease);
}
.side-nav a .bar {
  width: 28px; height: 1px; background: var(--text-faint);
  transition: width 0.25s var(--ease), background 0.25s var(--ease);
}
.side-nav a:hover, .side-nav a.is-active { color: var(--text); }
.side-nav a:hover .bar, .side-nav a.is-active .bar { width: 56px; background: var(--accent); }
@media (max-width: 1024px) { .side-nav { display: none; } }

/* Socials */
.socials {
  display: flex;
  gap: 18px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.socials a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.socials a:hover { color: var(--accent); border-bottom-color: var(--accent-line); }
.socials .icn {
  width: 14px; height: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text-faint);
}
.socials a:hover .icn { color: var(--accent); }

/* Availability pill */
.avail {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 20px;
}

/* =========================================================
   Main content sections
   ========================================================= */
.section {
  padding: 64px 0 96px;
  scroll-margin-top: 24px;
}
.section:first-child { padding-top: 0; }

.section-head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.section-head::before {
  content: '';
  width: 12px; height: 1px;
  background: var(--accent);
}
.section-head .num {
  color: var(--accent);
  font-weight: 600;
}

.prose p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0 0 18px;
  text-wrap: pretty;
}
.prose p:last-child { margin-bottom: 0; }
.prose strong, .prose .em {
  color: var(--text);
  font-weight: 500;
}
.prose .kbd {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--accent-line);
}

/* =========================================================
   Project list
   ========================================================= */
.proj-list { display: flex; flex-direction: column; gap: 8px; }

.proj {
  position: relative;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  padding: 28px 24px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
  cursor: pointer;
}
.proj::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 10px;
  background: linear-gradient(180deg, transparent, var(--bg-elev));
  opacity: 0;
  transition: opacity 0.25s var(--ease);
  z-index: -1;
  pointer-events: none;
}
.proj:hover { border-color: var(--line); }
.proj:hover::before { opacity: 1; }
.proj:hover .proj-title { color: var(--accent); }
.proj:hover .proj-arrow { transform: translate(2px, -2px); color: var(--accent); }

.proj-year {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-top: 5px;
  line-height: 1.5;
}
.proj-body { display: flex; flex-direction: column; gap: 10px; }
.proj-title-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}
.proj-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: color 0.2s var(--ease);
}
.proj-arrow {
  display: inline-block;
  color: var(--text-faint);
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
  font-family: var(--font-mono);
  font-size: 13px;
}
.proj-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}
.proj-summary {
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.65;
  margin: 4px 0 6px;
  text-wrap: pretty;
}
.stack {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 4px;
}
.stack-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .proj { grid-template-columns: 1fr; gap: 6px; padding: 20px 0; border-radius: 0; border-top: 1px solid var(--line); }
  .proj:hover { border-color: var(--line); }
  .proj:hover::before { opacity: 0; }
  .proj-year { padding-top: 0; }
}

/* =========================================================
   Experience
   ========================================================= */
.exp-list { display: flex; flex-direction: column; gap: 8px; }
.exp {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.exp:first-child { border-top: none; padding-top: 0; }
.exp-period {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-top: 4px;
}
.exp-role {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 2px;
  letter-spacing: -0.005em;
}
.exp-company {
  font-size: 14px;
  color: var(--accent);
  margin: 0 0 4px;
  font-weight: 500;
}
.exp-loc {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.exp-bullets { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.exp-bullets li {
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.65;
  padding-left: 18px;
  position: relative;
}
.exp-bullets li::before {
  content: '▸';
  position: absolute; left: 0; top: 0;
  color: var(--accent);
  font-size: 11px;
}
@media (max-width: 600px) {
  .exp { grid-template-columns: 1fr; gap: 8px; }
}

/* =========================================================
   Skills
   ========================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.skill-group {
  padding: 18px 20px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
  font-weight: 600;
}
.skill-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 4px;
}
.skill-list li {
  font-size: 13.5px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

/* =========================================================
   Contact / footer
   ========================================================= */
.cta-card {
  margin-top: 24px;
  padding: 36px 32px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}
.cta-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 100% 0%, var(--accent-soft) 0%, transparent 50%);
  pointer-events: none;
}
.cta-title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--text);
}
.cta-sub {
  color: var(--text-dim);
  margin: 0 0 24px;
  font-size: 15px;
  text-wrap: pretty;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; position: relative; z-index: 1; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 18px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  font-family: var(--font-sans);
  transition: all 0.2s var(--ease);
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: var(--bg-card);
}
.btn:hover { border-color: var(--accent-line); color: var(--accent); transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #052e1d;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover {
  background: #6ee7b7;
  border-color: #6ee7b7;
  color: #052e1d;
  transform: translateY(-1px);
}
.btn .icn {
  width: 14px; height: 14px;
  display: inline-flex; align-items: center; justify-content: center;
}

.foot {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* =========================================================
   Animations
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Project detail page
   ========================================================= */
.detail-shell {
  position: relative; z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  padding: 96px 32px 160px;
}
.back-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 48px;
  transition: color 0.2s var(--ease), gap 0.2s var(--ease);
}
.back-link:hover { color: var(--accent); gap: 12px; }

.detail-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.detail-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 14px;
  text-wrap: balance;
}
.detail-kicker {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 32px;
}

.detail-summary {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-dim);
  margin: 0 0 36px;
  text-wrap: pretty;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 36px;
  margin-bottom: 48px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.detail-grid h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 8px;
  font-weight: 600;
}
.detail-grid p, .detail-grid div { font-size: 14px; color: var(--text); margin: 0; }
@media (max-width: 700px) { .detail-grid { grid-template-columns: 1fr; gap: 18px; } }

.detail-section { margin-bottom: 48px; }
.detail-section h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
}

.diagram {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  line-height: 1.5;
  white-space: pre;
  overflow-x: auto;
  margin: 0 0 12px;
}
.diagram-cap {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

.bullets-rich {
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 12px;
}
.bullets-rich li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}
.bullets-rich li::before {
  content: '✓';
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 14px;
  padding-top: 2px;
}

.next-proj {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.next-proj-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 4px;
}
.next-proj-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: color 0.2s var(--ease);
}
.next-proj a:hover .next-proj-title { color: var(--accent); }

/* =========================================================
   Tweaks panel positioning override (subtle)
   ========================================================= */
.tweaks-host { position: fixed; bottom: 24px; right: 24px; z-index: 50; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}