/* =========================================================
   FusLabs Portfolio — Shared Stylesheet
   ========================================================= */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Variables ── */
:root {
  --bg:            #0c0f14;
  --surface:       #12161d;
  --card:          #161b24;
  --card-hover:    #1c2232;
  --border:        #1e2530;
  --border-light:  #252d3a;

  --text-primary:   #f0f2f5;
  --text-secondary: #8b92a0;
  --text-muted:     #4b5563;
  --accent:         #ffffff;
  --accent-dim:     rgba(255,255,255,0.08);

  --tag-bg:    #1a2030;
  --tag-text:  #8b92a0;
  --tag-border:#252d3a;

  --nav-height: 64px;
  --max-width:  1100px;
  --radius:     12px;
  --radius-sm:  8px;

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

  --transition: 200ms ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }

.label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}
.section-heading::before {
  content: '';
  display: block;
  width: 3px;
  height: 22px;
  background: var(--text-primary);
  border-radius: 2px;
}
.section-heading h2 {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── Navigation ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(12, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-primary);
}
.nav-logo span { color: var(--text-muted); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a.active { color: var(--text-primary); }

.nav-back {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-back:hover { color: var(--text-primary); }
.nav-back::before {
  content: '←';
  font-size: 1rem;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero-content {
  max-width: 720px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 3px;
  height: 20px;
  background: var(--text-primary);
  border-radius: 2px;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg);
}
.btn-primary:hover {
  background: rgba(240,242,245,0.88);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

/* ── Tags / Pills ── */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  white-space: nowrap;
}

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition), background var(--transition);
}
.card:hover {
  border-color: var(--border-light);
  background: var(--card-hover);
}

/* ── Project Grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  cursor: pointer;
}
.project-card:hover {
  border-color: var(--border-light);
  background: var(--card-hover);
  transform: translateY(-2px);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.project-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.project-card-arrow {
  font-size: 1rem;
  color: var(--text-muted);
  transition: color var(--transition), transform var(--transition);
}
.project-card:hover .project-card-arrow {
  color: var(--text-primary);
  transform: translate(2px, -2px);
}

.project-card-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.project-card-platform {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.project-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

/* ── Skills Grid ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.skill-group {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
}
.skill-group-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.skill-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.skill-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ── Project Detail Page ── */
.project-hero {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 64px;
}

.project-hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.project-hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.project-hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.project-hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 28px 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 64px;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.meta-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.meta-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.feature-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}
.feature-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.feature-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── About Section ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 760px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

.about-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-text p:last-child { margin-bottom: 0; }

.about-badges {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.badge {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.badge-icon { font-size: 1rem; }
.badge-label {
  font-size: 0.83rem;
  color: var(--text-secondary);
}
.badge-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.badge-text { display: flex; flex-direction: column; gap: 2px; }

/* ── Contact ── */
.contact-inner {
  max-width: 560px;
}
.contact-inner p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
}
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 4px;
  transition: border-color var(--transition);
}
.contact-email:hover { border-color: var(--text-secondary); }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text-secondary); }

/* ── Privacy Policy Page ── */
.policy-content {
  max-width: 720px;
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 80px;
}
.policy-content h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}
.policy-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 48px;
}
.policy-content h2 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 40px;
  margin-bottom: 12px;
}
.policy-content p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.policy-content ul {
  padding-left: 20px;
  margin-bottom: 12px;
  list-style: disc;
}
.policy-content ul li {
  font-size: 0.93rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.policy-content a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.policy-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ── Fade-in animation ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  animation: fadeUp 0.5s ease forwards;
}
.fade-up:nth-child(1) { animation-delay: 0.05s; }
.fade-up:nth-child(2) { animation-delay: 0.12s; }
.fade-up:nth-child(3) { animation-delay: 0.19s; }
.fade-up:nth-child(4) { animation-delay: 0.26s; }
.fade-up:nth-child(5) { animation-delay: 0.33s; }
.fade-up:nth-child(6) { animation-delay: 0.40s; }

/* ── Responsive ── */
@media (max-width: 640px) {
  section { padding: 72px 0; }
  .nav-links { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .project-meta { gap: 16px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}