:root {
  --bg: #0d0d0f;
  --surface: #141416;
  --surface2: #1a1a1e;
  --border: #232328;
  --violet: #8b5cf6;
  --violet-dim: #6d46c7;
  --mint: #34d399;
  --text: #e8e8ec;
  --muted: #6b6b78;
  --subtle: #3a3a42;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}

/* ─── SIDEBAR ─── */
.sidebar {
  width: 280px;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 40px 24px 32px;
  position: fixed;
  top: 0; left: 0;
  overflow-y: auto;
  flex-shrink: 0;
  z-index: 100;
}

.sidebar-greeting {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1.5px;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.sidebar-name {
  font-family: 'Space Mono', monospace;
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.sidebar-role {
  font-size: 10px;
  color: var(--mint);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 28px;
  font-weight: 500;
}

.sidebar-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 24px;
}

.contact-list {
  list-style: none;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}
.contact-list li { display: flex; align-items: center; gap: 12px; }

.contact-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-icon svg {
  width: 14px; height: 14px;
  stroke: var(--violet); fill: none;
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.contact-label {
  font-size: 10px; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--muted); font-weight: 600;
}
.contact-value { font-size: 13px; color: var(--text); word-break: break-all; }
.contact-value a { color: var(--text); text-decoration: none; transition: color 0.2s; }
.contact-value a:hover { color: var(--mint); }

.sidebar-nav {
  list-style: none; width: 100%;
  display: flex; flex-direction: column; gap: 4px;
}
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 8px;
  color: var(--muted); text-decoration: none;
  font-size: 13px; font-weight: 500;
  transition: all 0.2s; letter-spacing: 0.3px;
}
.sidebar-nav a:hover,
.sidebar-nav a.active { background: var(--surface2); color: var(--text); }
.sidebar-nav a.active { color: var(--mint); }

.nav-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--subtle); flex-shrink: 0; transition: background 0.2s;
}
.sidebar-nav a.active .nav-dot,
.sidebar-nav a:hover .nav-dot { background: var(--mint); }

/* ─── MAIN ─── */
.main { flex: 1; margin-left: 280px; overflow-x: hidden; }

/* ─── SECTIONS ─── */
section { padding: 64px 56px; border-bottom: 1px solid var(--border); }

.section-tag {
  font-family: 'Space Mono', monospace;
  font-size: 10px; color: var(--violet);
  text-transform: uppercase; letter-spacing: 3px;
  margin-bottom: 8px;
  display: flex; align-items: center; gap: 10px;
}
.section-tag::after {
  content: ''; flex: 1; max-width: 40px;
  height: 1px; background: var(--violet); opacity: 0.4;
}
.section-title {
  font-family: 'Space Mono', monospace;
  font-size: 28px; font-weight: 700; color: var(--text);
  margin-bottom: 32px; letter-spacing: -1px; line-height: 1.2;
}

/* ─── HERO ─── */
#about {
  background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
  position: relative; overflow: hidden; padding: 80px 56px;
}
#about::before {
  content: '// SOFTWARE_DEVELOPER.ZAF';
  position: absolute; top: 32px; right: 56px;
  font-family: 'Space Mono', monospace;
  font-size: 11px; color: var(--subtle); letter-spacing: 1px;
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px; opacity: 0.3; pointer-events: none;
}
.hero-glow {
  position: absolute; top: -80px; right: -80px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-intro { position: relative; z-index: 1; }
.hero-greeting {
  font-family: 'Space Mono', monospace;
  font-size: 12px; color: var(--mint);
  text-transform: uppercase; letter-spacing: 3px;
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.hero-greeting::before { content: ''; width: 24px; height: 1px; background: var(--mint); }
.hero-name {
  font-family: 'Space Mono', monospace;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700; color: var(--text);
  letter-spacing: -2px; line-height: 1.05; margin-bottom: 8px;
}
.hero-name span { color: var(--violet); }
.hero-subtitle { font-size: 16px; color: var(--muted); margin-bottom: 28px; }
.hero-description {
  max-width: 600px; font-size: 15px;
  color: #9898a8; line-height: 1.7; margin-bottom: 40px;
}
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 40px; }
.badge {
  padding: 5px 14px; border-radius: 100px;
  border: 1px solid var(--border); font-size: 12px;
  color: var(--muted); font-family: 'Space Mono', monospace;
  letter-spacing: 0.5px; transition: all 0.2s;
}
.badge:hover { border-color: var(--violet); color: var(--violet); }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  padding: 11px 24px; border-radius: 8px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  text-decoration: none; display: inline-flex;
  align-items: center; gap: 8px; transition: all 0.2s; letter-spacing: 0.3px;
}
.btn-primary { background: var(--violet); color: #fff; border: 1px solid var(--violet); }
.btn-primary:hover { background: var(--violet-dim); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--mint); color: var(--mint); transform: translateY(-1px); }

/* ─── SKILLS ─── */
#skills { background: var(--bg); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.skill-group {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px; transition: border-color 0.2s;
}
.skill-group:hover { border-color: var(--violet); }
.skill-group-label {
  font-family: 'Space Mono', monospace; font-size: 10px;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--violet); margin-bottom: 14px; font-weight: 700;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.skill-tag {
  padding: 4px 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; font-size: 12px; color: var(--text);
  font-family: 'Space Mono', monospace;
}

/* ─── PORTFOLIO ─── */
#portfolio { background: var(--surface); }
.filter-bar { display: flex; gap: 8px; margin-bottom: 36px; flex-wrap: wrap; }
.filter-btn {
  padding: 7px 18px; border-radius: 100px;
  border: 1px solid var(--border); background: transparent;
  color: var(--muted); font-size: 12px; cursor: pointer;
  font-family: 'DM Sans', sans-serif; font-weight: 500;
  transition: all 0.2s; letter-spacing: 0.3px;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--violet); border-color: var(--violet); color: #fff;
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.project-card {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden;
  transition: all 0.25s; display: flex; flex-direction: column;
}
.project-card:hover {
  border-color: var(--violet); transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(139,92,246,0.12);
}
.project-thumb {
  height: 160px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.project-thumb-bg {
  position: absolute; inset: 0; opacity: 0.15; transition: opacity 0.3s;
}
.project-card:hover .project-thumb-bg { opacity: 0.25; }
.project-thumb-icon {
  position: relative; z-index: 1;
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.project-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.project-type {
  font-size: 10px; text-transform: uppercase; letter-spacing: 2px;
  color: var(--mint); font-weight: 600; margin-bottom: 8px;
  font-family: 'Space Mono', monospace;
}
.project-name {
  font-family: 'Space Mono', monospace; font-size: 16px;
  font-weight: 700; color: var(--text); margin-bottom: 10px; letter-spacing: -0.5px;
}
.project-desc { font-size: 13px; color: var(--muted); line-height: 1.6; flex: 1; margin-bottom: 16px; }
.project-stack { display: flex; flex-wrap: wrap; gap: 5px; }
.stack-tag {
  padding: 3px 8px;
  background: rgba(139,92,246,0.1); border: 1px solid rgba(139,92,246,0.25);
  border-radius: 4px; font-size: 11px; color: var(--violet);
  font-family: 'Space Mono', monospace;
}

/* ─── EDUCATION ─── */
#education { background: var(--bg); }
.edu-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px;
  display: flex; gap: 24px; margin-bottom: 24px;
  transition: border-color 0.2s; max-width: 720px;
}
.edu-card:hover { border-color: var(--mint); }
.edu-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--violet), var(--mint));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-family: 'Space Mono', monospace;
  font-size: 15px; color: #fff; font-weight: 700;
}
.edu-school {
  font-family: 'Space Mono', monospace; font-size: 16px;
  font-weight: 700; color: var(--text); margin-bottom: 4px; letter-spacing: -0.5px;
}
.edu-degree { font-size: 14px; color: var(--mint); margin-bottom: 4px; font-weight: 500; }
.edu-years {
  font-family: 'Space Mono', monospace; font-size: 11px;
  color: var(--muted); letter-spacing: 1px; margin-bottom: 14px;
}
.edu-modules { display: flex; flex-wrap: wrap; gap: 6px; }
.module-tag {
  padding: 3px 10px; background: var(--surface2);
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 11px; color: var(--muted);
}

/* ─── CONTACT ─── */
#contact { background: var(--surface); }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px; max-width: 800px;
}
.contact-card {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px;
  display: flex; align-items: center; gap: 16px;
  text-decoration: none; transition: all 0.2s;
}
.contact-card:hover { border-color: var(--mint); transform: translateY(-2px); }
.contact-card-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: linear-gradient(135deg, var(--violet), var(--mint));
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-card-icon svg {
  width: 18px; height: 18px; stroke: #fff; fill: none;
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.contact-card-label {
  font-size: 10px; text-transform: uppercase;
  letter-spacing: 2px; color: var(--muted); font-weight: 600; margin-bottom: 3px;
}
.contact-card-value { font-size: 13px; color: var(--text); font-weight: 500; word-break: break-all; }

/* ─── FOOTER ─── */
footer {
  padding: 28px 56px;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg);
}
.footer-copy { font-family: 'Space Mono', monospace; font-size: 11px; color: var(--muted); }
.footer-made { font-size: 12px; color: var(--subtle); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--subtle); border-radius: 10px; }

/* ─── MOBILE NAV (hidden on desktop) ─── */
.mobile-nav { display: none; }

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 900px) {
  .sidebar {
    width: 100%; height: auto; min-height: unset;
    position: fixed; top: 0; left: 0; right: 0;
    flex-direction: row; align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-right: none; border-bottom: 1px solid var(--border);
    z-index: 200; overflow: visible;
    backdrop-filter: blur(14px);
    background: rgba(20,20,22,0.96);
  }
  .contact-list, .sidebar-divider, .sidebar-nav { display: none; }
  .sidebar-greeting { font-size: 9px; margin-bottom: 1px; letter-spacing: 1px; }
  .sidebar-name { font-size: 15px; margin-bottom: 2px; letter-spacing: -0.3px; }
  .sidebar-name br { display: none; }
  .sidebar-role { font-size: 8px; letter-spacing: 1.2px; margin-bottom: 0; }

  .main { margin-left: 0; margin-top: 66px; padding-bottom: 76px; }
  section { padding: 36px 20px; }
  #about { padding: 40px 20px; }
  #about::before { display: none; }
  .hero-name { font-size: 32px; letter-spacing: -1.5px; }
  .hero-subtitle { font-size: 13px; }
  .hero-description { font-size: 14px; margin-bottom: 28px; }
  .section-title { font-size: 22px; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .edu-card { flex-direction: column; gap: 16px; padding: 20px; }
  footer { padding: 20px; flex-direction: column; gap: 6px; text-align: center; }

  .mobile-nav {
    display: flex;
    position: fixed; bottom: 0; left: 0; right: 0;
    background: rgba(20,20,22,0.97);
    border-top: 1px solid var(--border);
    z-index: 200;
    backdrop-filter: blur(14px);
  }
  .mobile-nav a {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 9px 4px 8px;
    color: var(--muted); text-decoration: none;
    font-size: 9px; font-family: 'Space Mono', monospace;
    letter-spacing: 0.5px; text-transform: uppercase;
    gap: 4px; border-top: 2px solid transparent; transition: all 0.2s;
  }
  .mobile-nav a svg {
    width: 17px; height: 17px; stroke: currentColor; fill: none;
    stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
  }
  .mobile-nav a.active,
  .mobile-nav a:hover { color: var(--mint); border-top-color: var(--mint); }
}

@media (max-width: 480px) {
  .skills-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-badges { gap: 6px; }
  .badge { font-size: 10px; padding: 4px 10px; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}