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

:root {
  --bg-primary: hsl(0, 0%, 7%);
  --bg-secondary: hsl(240, 2%, 12%);
  --bg-card: hsl(240, 2%, 13%);
  --border: hsl(0, 0%, 22%);
  --accent: #E2E8CE;
  --text-primary: hsl(0, 0%, 95%);
  --text-secondary: hsl(0, 0%, 84%);
  --text-muted: hsla(0, 0%, 84%, 0.7);
  --shadow: hsla(0, 0%, 0%, 0.25);
  --radius: 14px;
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
}

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

/* ---- HEADER / BACK NAV ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  transition: opacity var(--transition);
}
.back-btn:hover { opacity: 0.75; }

.back-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.header-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ---- HERO ---- */
.hero {
  width: 100%;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero-img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  object-position: top;
  display: block;
}

/* ---- MAIN CONTENT ---- */
.content-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---- PROJECT HEADER ---- */
.project-header {
  margin-bottom: 40px;
}

.project-category-badge {
  display: inline-block;
  background: rgba(226, 232, 206, 0.12);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(226, 232, 206, 0.25);
  margin-bottom: 14px;
}

.project-name {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ---- SECTION ---- */
.section {
  margin-bottom: 40px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-text {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}

/* ---- TECH STACK ---- */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  transition: border-color var(--transition), background var(--transition);
}

.tech-pill:hover {
  border-color: var(--accent);
  background: rgba(226, 232, 206, 0.06);
}

.tech-pill img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border-radius: 3px;
}

/* ---- CTA ---- */
.cta-row {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: hsl(240, 18%, 13%);
  font-family: 'Poppins', sans-serif;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-primary svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: hsl(240, 18%, 13%);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-secondary);
  font-family: 'Poppins', sans-serif;
  font-size: 14px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  text-decoration: none;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ---- DIVIDER ---- */
.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 600px) {
  .content-wrap { padding: 32px 16px 60px; }
  .hero-img { max-height: 240px; }
  .tech-pill { font-size: 12px; padding: 6px 12px; }
}