/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --bg-card:   #161b22;
  --bg-block:  #1c2128;
  --border:    #30363d;
  --border-hi: #484f58;
  --text:      #e6edf3;
  --text-muted:#8b949e;
  --text-dim:  #6e7681;
  --accent:    #58a6ff;
  --accent-2:  #3fb950;

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius:    10px;
  --radius-sm: 5px;
  --max-w:     860px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.identity {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text);
}
.identity:hover { text-decoration: none; }

.name   { font-weight: 600; }
.separator { color: var(--border-hi); }
.role   { color: var(--text-muted); }

.header-nav { display: flex; gap: 1.5rem; }
.header-nav a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s;
}
.header-nav a:hover { color: var(--text); text-decoration: none; }

/* ── Hero (Landing) ── */
.hero {
  padding: 6rem 0 5rem;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
}

/* ── Project Hero (Detail Pages) ── */
.project-hero {
  padding: 4rem 0 3.5rem;
  border-bottom: 1px solid var(--border);
}

.project-hero-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.project-type-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.platform-badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25em 0.65em;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}

.badge-android { background: #1b3a2e; color: #3fb950; border: 1px solid #238636; }
.badge-ios     { background: #1a1f2e; color: #79c0ff; border: 1px solid #264466; }
.badge-web     { background: #2a1f3a; color: #d2a8ff; border: 1px solid #553098; }
.badge-desktop { background: #2a2118; color: #e3b341; border: 1px solid #5d4a1f; }
.badge-live {
  background: #1b3a2e; color: #3fb950; border: 1px solid #238636;
  display: inline-flex; align-items: center; gap: 0.25em;
}
.badge-live:hover { opacity: 0.8; text-decoration: none; }

.project-hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.project-hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 1.75rem;
}

/* Shared chip row */
.hero-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3em 0.75em;
  border: 1px solid var(--border-hi);
  border-radius: 100px;
  color: var(--text-muted);
}

/* ── Projects Section (Landing) ── */
.projects-section {
  padding: 4rem 0 6rem;
}

.section-title {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.project-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}
.project-card-link:hover .project-card { border-color: var(--border-hi); }
.project-card-link:hover .card-arrow   { color: var(--text); }

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: border-color 0.2s;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.card-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
  flex: 1;
}

.card-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.card-arrow {
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: color 0.15s;
  margin-top: auto;
}

/* ── Project Detail Pages ── */
.project-page {
  padding: 3.5rem 0 0;
}

.content-section {
  margin-bottom: 3.5rem;
}

.content-heading {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.content-text {
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 680px;
}
.content-text + .content-text { margin-top: 0.85rem; }

/* ── Feature Grid ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

.feature-icon {
  font-size: 1.4rem;
  margin-bottom: 0.6rem;
}

.feature-item h3 {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.feature-item p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Stack Overview ── */
.stack-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stack-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

.stack-col-label {
  display: block;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.stack-col p {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Project Nav Bar ── */
.project-nav-bar {
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  padding: 1.25rem 0;
}

.project-nav-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pnav-back,
.pnav-next {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.15s;
}
.pnav-back:hover,
.pnav-next:hover { color: var(--text); text-decoration: none; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.footer-name  { font-weight: 600; margin-bottom: 0.25rem; }
.footer-email { font-size: 0.85rem; color: var(--text-muted); }
.footer-email:hover { color: var(--accent); text-decoration: none; }
.footer-copy  { font-size: 0.8rem; color: var(--text-dim); font-family: var(--font-mono); }

/* ── Responsive ── */
@media (max-width: 640px) {
  .project-grid  { grid-template-columns: 1fr; }
  .stack-overview { grid-template-columns: 1fr; }
  .feature-grid  { grid-template-columns: 1fr; }
  .footer-inner  { flex-direction: column; gap: 1rem; align-items: flex-start; }
  .project-nav-bar .container { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
}