/* ===========================================
   RESET & VARIABLES
   =========================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0a0a0f;
  --bg2:     #12121a;
  --bg3:     #1a1a26;
  --accent:  #6c63ff;
  --accent2: #a78bfa;
  --gold:    #f59e0b;
  --text:    #e2e8f0;
  --text2:   #94a3b8;
  --border:  rgba(108,99,255,0.2);
  --radius:  14px;
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; overflow-x: hidden; }

@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }
.hero-inner { animation: fadeUp 0.7s ease both; }

/* NAV */
nav { position:fixed; top:0; left:0; right:0; z-index:200; display:flex; align-items:center; justify-content:space-between; padding:1rem 2.5rem; background:rgba(10,10,15,0.9); backdrop-filter:blur(14px); border-bottom:1px solid var(--border); gap:1rem; }
.nav-logo { font-weight:700; font-size:1.1rem; background:linear-gradient(135deg,var(--accent),var(--accent2)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; white-space:nowrap; }
.nav-links { display:flex; gap:1.2rem; list-style:none; flex-wrap:wrap; }
.nav-links a { color:var(--text2); text-decoration:none; font-size:0.82rem; font-weight:500; transition:color 0.2s; }
.nav-links a:hover { color:var(--accent2); }
.lang-btn { background:transparent; border:1px solid var(--border); color:var(--text2); font-size:0.78rem; font-weight:700; padding:0.3rem 0.7rem; border-radius:8px; cursor:pointer; transition:all 0.2s; white-space:nowrap; font-family:'JetBrains Mono',monospace; flex-shrink:0; }
.lang-btn:hover { border-color:var(--accent2); color:var(--accent2); }

/* HERO */
.hero { min-height:100vh; display:flex; align-items:center; justify-content:center; padding:6rem 2rem 4rem; position:relative; overflow:hidden; }
.hero::before { content:''; position:absolute; inset:0; background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(108,99,255,0.12) 0%,transparent 70%); pointer-events:none; }
.hero-inner { max-width:820px; text-align:center; position:relative; z-index:1; }
.hero-badge { display:inline-flex; align-items:center; gap:0.5rem; background:rgba(108,99,255,0.12); border:1px solid var(--border); border-radius:100px; padding:0.4rem 1rem; font-size:0.8rem; color:var(--accent2); font-weight:500; margin-bottom:1.8rem; }
.hero-badge .dot { width:6px; height:6px; border-radius:50%; background:#22c55e; display:inline-block; animation:pulse 2s infinite; }
h1 { font-size:clamp(2.4rem,6vw,4.2rem); font-weight:800; line-height:1.15; margin-bottom:1.2rem; }
h1 .name { background:linear-gradient(135deg,#fff 30%,var(--accent2)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
h1 .role { color:var(--text2); font-weight:400; font-size:0.65em; display:block; margin-top:0.4rem; }
.hero-desc { font-size:1.05rem; color:var(--text2); max-width:580px; margin:0 auto 2.5rem; }
.hero-btns { display:flex; gap:1rem; justify-content:center; flex-wrap:wrap; }

/* BUTTONS */
.btn { display:inline-flex; align-items:center; gap:0.5rem; padding:0.75rem 1.6rem; border-radius:10px; font-weight:600; font-size:0.95rem; text-decoration:none; transition:all 0.2s; cursor:pointer; border:none; }
.btn-primary { background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(108,99,255,0.4); }
.btn-ghost { border:1px solid var(--border) !important; color:var(--text2); background:transparent; }
.btn-ghost:hover { border-color:var(--accent2) !important; color:var(--accent2); transform:translateY(-2px); }

/* SECTIONS */
section { padding:5rem 2rem; }
.container { max-width:1000px; margin:0 auto; }
.section-label { font-family:'JetBrains Mono',monospace; font-size:0.8rem; color:var(--accent); letter-spacing:0.12em; text-transform:uppercase; margin-bottom:0.8rem; }
.section-title { font-size:clamp(1.8rem,4vw,2.5rem); font-weight:700; margin-bottom:1rem; }
.section-sub { color:var(--text2); max-width:560px; margin-bottom:3rem; }

/* APPROCHE */
#approach { background:var(--bg2); }
.approach-layout { display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:start; }
.approach-lead { font-size:1.25rem; font-weight:600; color:var(--text); line-height:1.4; margin-bottom:1.2rem; }
.approach-text p { font-size:0.95rem; color:var(--text2); line-height:1.75; margin-bottom:1rem; }
.approach-cards { display:flex; flex-direction:column; gap:1.2rem; }
.approach-card { background:var(--bg3); border:1px solid var(--border); border-radius:var(--radius); padding:1.4rem 1.5rem; transition:transform 0.2s,border-color 0.2s; }
.approach-card:hover { transform:translateY(-3px); border-color:rgba(108,99,255,0.45); }
.approach-card-icon { font-size:1.6rem; display:block; margin-bottom:0.6rem; }
.approach-card h3 { font-size:0.95rem; font-weight:600; color:var(--text); margin-bottom:0.4rem; }
.approach-card p { font-size:0.84rem; color:var(--text2); line-height:1.65; }

/* PROJECTS */
#projects { background:var(--bg); }
.projects-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(290px,1fr)); gap:1.5rem; align-items:stretch; }
.card { display:flex; flex-direction:column; background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:1.6rem; transition:transform 0.25s,border-color 0.25s,box-shadow 0.25s; }
.card:hover { transform:translateY(-4px); border-color:rgba(108,99,255,0.5); box-shadow:0 16px 36px rgba(0,0,0,0.3); }
.card-lab { background:var(--bg3); }
.card-body { flex:1; display:flex; flex-direction:column; }
.card-header { display:flex; align-items:flex-start; justify-content:space-between; margin-bottom:0.8rem; }
.card-icon { font-size:1.8rem; line-height:1; }
.card-badge { font-size:0.72rem; font-weight:600; padding:0.2rem 0.7rem; border-radius:100px; background:rgba(108,99,255,0.15); color:var(--accent2); border:1px solid rgba(108,99,255,0.3); white-space:nowrap; }
.card-badge.gold { background:rgba(245,158,11,0.1); color:var(--gold); border-color:rgba(245,158,11,0.3); }
.card-badge.green { background:rgba(34,197,94,0.1); color:#22c55e; border-color:rgba(34,197,94,0.3); }
.card h3 { font-size:1.05rem; font-weight:600; margin-bottom:0.5rem; color:var(--text); }
.card p { font-size:0.87rem; color:var(--text2); margin-bottom:1rem; }
.card-tags { display:flex; flex-wrap:wrap; gap:0.4rem; margin-top:auto; padding-bottom:1rem; }
.tag { font-size:0.72rem; font-family:'JetBrains Mono',monospace; padding:0.2rem 0.6rem; border-radius:6px; background:rgba(255,255,255,0.05); color:var(--text2); }
.card-links { display:flex; gap:0.6rem; flex-wrap:wrap; align-items:center; padding-top:1rem; border-top:1px solid var(--border); }
.card-btn { display:inline-flex; align-items:center; gap:0.35rem; font-size:0.78rem; font-weight:600; padding:0.3rem 0.85rem; border-radius:7px; border:1px solid rgba(108,99,255,0.35); background:rgba(108,99,255,0.1); color:var(--accent2); text-decoration:none; white-space:nowrap; transition:background 0.18s,border-color 0.18s; }
.card-btn:hover { background:rgba(108,99,255,0.22); border-color:var(--accent2); }
.card-btn.live { color:#22c55e; background:rgba(34,197,94,0.08); border-color:rgba(34,197,94,0.35); }
.card-btn.live:hover { background:rgba(34,197,94,0.22); border-color:#22c55e; }

/* Labs sub-section */
.labs-sub { margin-top:3.5rem; padding-top:2.5rem; border-top:1px solid var(--border); }
.labs-sub-label { font-family:'JetBrains Mono',monospace; font-size:0.85rem; color:var(--accent); letter-spacing:0.1em; margin-bottom:1.5rem; display:block; }

/* ===========================================
   EXPERIENCE
   =========================================== */
#experience { background:var(--bg2); }

.exp-timeline { display:flex; flex-direction:column; gap:0; max-width:800px; }

.exp-item { display:flex; gap:1.5rem; position:relative; padding-bottom:2.5rem; }
.exp-item:last-child { padding-bottom:0; }

.exp-dot {
  width:14px; height:14px; border-radius:50%;
  background:var(--bg3); border:2px solid var(--accent);
  flex-shrink:0; margin-top:0.4rem; position:relative; z-index:1;
}
.exp-dot.active { background:var(--accent); box-shadow:0 0 0 5px rgba(108,99,255,0.18); }
.exp-item:not(:last-child) .exp-dot::after {
  content:''; position:absolute; top:14px; left:50%;
  transform:translateX(-50%); width:2px;
  height:calc(100% + 2.5rem - 14px);
  background:var(--border); z-index:0;
}

.exp-content { flex:1; }
.exp-header { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:0.8rem; flex-wrap:wrap; gap:0.5rem; }
.exp-date { font-family:'JetBrains Mono',monospace; font-size:0.72rem; color:var(--accent); letter-spacing:0.05em; display:block; margin-bottom:0.2rem; }
.exp-title { font-size:1rem; font-weight:700; color:var(--text); }
.exp-company { font-weight:400; color:var(--accent2); }
.exp-location { font-size:0.8rem; color:var(--text2); margin-top:0.15rem; }

.exp-badge {
  font-size:0.7rem; font-weight:600; padding:0.2rem 0.75rem;
  border-radius:100px; background:rgba(108,99,255,0.12);
  color:var(--accent2); border:1px solid rgba(108,99,255,0.28);
  white-space:nowrap; flex-shrink:0;
}
.exp-badge.active-badge { background:rgba(34,197,94,0.1); color:#22c55e; border-color:rgba(34,197,94,0.3); }

.exp-desc { font-size:0.88rem; color:var(--text2); line-height:1.7; margin-bottom:0.8rem; }

.exp-bullets { list-style:none; display:flex; flex-direction:column; gap:0.5rem; margin-bottom:1rem; }
.exp-bullets li { font-size:0.85rem; color:var(--text2); line-height:1.65; padding-left:1rem; position:relative; }
.exp-bullets li::before { content:'▸'; position:absolute; left:0; color:var(--accent); font-size:0.75rem; top:0.1rem; }

.exp-tags { display:flex; flex-wrap:wrap; gap:0.4rem; }

/* ===========================================
   FORMATION
   =========================================== */
#education { background:var(--bg); }

.edu-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(290px,1fr)); gap:1.5rem; }

.edu-card {
  background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.6rem;
  transition:transform 0.2s,border-color 0.2s;
}
.edu-card:hover { transform:translateY(-3px); border-color:rgba(108,99,255,0.45); }

.edu-card-top { display:flex; gap:1rem; align-items:flex-start; margin-bottom:1rem; }
.edu-icon { font-size:2rem; flex-shrink:0; line-height:1; }
.edu-date { font-family:'JetBrains Mono',monospace; font-size:0.7rem; color:var(--accent); display:block; margin-bottom:0.2rem; }
.edu-card h3 { font-size:0.95rem; font-weight:700; color:var(--text); line-height:1.3; }
.edu-school { font-size:0.82rem; color:var(--accent2); margin-top:0.2rem; }

.edu-bullets { list-style:none; display:flex; flex-direction:column; gap:0.45rem; margin-bottom:1rem; }
.edu-bullets li { font-size:0.83rem; color:var(--text2); line-height:1.6; padding-left:1rem; position:relative; }
.edu-bullets li::before { content:'▸'; position:absolute; left:0; color:var(--accent); font-size:0.72rem; top:0.1rem; }

.edu-tags { display:flex; flex-wrap:wrap; gap:0.4rem; }

/* ===========================================
   PROFIL (about mini)
   =========================================== */
#about { background:var(--bg2); }
.about-mini { display:grid; grid-template-columns:1fr auto; gap:3rem; align-items:start; }
.about-mini-text p { color:var(--text2); font-size:0.95rem; line-height:1.75; }
.about-btns { display:flex; gap:0.8rem; flex-wrap:wrap; }
.about-stats { display:grid; grid-template-columns:1fr 1fr; gap:1rem; min-width:260px; }
.stat-box { background:var(--bg3); border:1px solid var(--border); border-radius:var(--radius); padding:1.2rem; text-align:center; }
.stat-box .num { font-size:2rem; font-weight:800; background:linear-gradient(135deg,var(--accent),var(--accent2)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-box .label { font-size:0.8rem; color:var(--text2); margin-top:0.2rem; }

/* SKILLS */
#skills { background:var(--bg); }
.skills-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(140px,1fr)); gap:1rem; }
.skill-chip { background:var(--bg2); border:1px solid var(--border); border-radius:10px; padding:0.9rem 1rem; text-align:center; font-size:0.88rem; font-weight:500; color:var(--text2); transition:all 0.2s; }
.skill-chip:hover { border-color:var(--accent2); color:var(--text); transform:translateY(-3px); }
.skill-chip .icon { font-size:1.4rem; display:block; margin-bottom:0.3rem; }

/* CONTACT */
#contact { background:var(--bg2); }
.contact-card { background:var(--bg3); border:1px solid var(--border); border-radius:20px; padding:3rem 2rem; max-width:600px; margin:0 auto; text-align:center; }
.contact-card h2 { font-size:1.8rem; font-weight:700; margin-bottom:0.8rem; }
.contact-card p { color:var(--text2); margin-bottom:2rem; }
.social-links { display:flex; justify-content:center; gap:1rem; flex-wrap:wrap; }
.social-link { display:inline-flex; align-items:center; gap:0.5rem; padding:0.6rem 1.2rem; border-radius:10px; border:1px solid var(--border); color:var(--text2); text-decoration:none; font-size:0.88rem; font-weight:500; transition:all 0.2s; }
.social-link:hover { border-color:var(--accent2); color:var(--text); transform:translateY(-2px); }

/* FOOTER */
footer { background:var(--bg); border-top:1px solid var(--border); padding:1.5rem 2rem; text-align:center; color:var(--text2); font-size:0.82rem; }

/* RESPONSIVE */
@media (max-width:800px) {
  .approach-layout { grid-template-columns:1fr; }
  .about-mini { grid-template-columns:1fr; }
  .edu-grid { grid-template-columns:1fr; }
}
@media (max-width:600px) {
  nav { padding:0.8rem 1rem; }
  .nav-links { gap:0.7rem; }
  .nav-links a { font-size:0.72rem; }
  .projects-grid { grid-template-columns:1fr; }
  .exp-item { gap:1rem; }
}