:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --card-bg: #16213e;
  --accent: #00d4ff;
  --accent2: #7c3aed;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: #2d2d44;
  --shadow: 0 8px 32px rgba(0,0,0,.4);
  --radius: 16px;
  --radius-sm: 10px;
  --sidebar-w: 300px;
  --transition: .35s cubic-bezier(.4,0,.2,1);
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:var(--bg); }
::-webkit-scrollbar-thumb { background:var(--accent); border-radius:3px; }

/* ===== CONTAINER ===== */
.container { display:flex; min-height:100vh; }

/* ===== MOBILE HEADER (hidden on desktop) ===== */
.mobile-header { display:none; }

/* ===== SIDEBAR (DESKTOP) ===== */
.sidebar {
  width: var(--sidebar-w);
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  z-index: 50;
  transition: transform var(--transition);
}
.sidebar-inner { padding: 40px 24px; display:flex; flex-direction:column; align-items:center; }

/* Photo */
.profile-photo {
  position: relative;
  width: 140px; height: 140px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}
.photo-ring {
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent2)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: spin 6s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

.sidebar-name {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sidebar-title {
  color: var(--text-dim);
  font-size: .9rem;
  margin-bottom: 8px;
}

.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 20px 0;
}

/* Contact */
.contact-section { width:100%; }
.contact-section h3,
.skills-section h3,
.languages-section h3 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.contact-list { list-style:none; display:flex; flex-direction:column; gap:10px; }
.contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .85rem;
  color: var(--text-dim);
  transition: color var(--transition);
}
.contact-list li:hover { color: var(--text); }
.contact-list li i {
  width: 16px;
  color: var(--accent);
  font-size: .9rem;
}
.contact-list li span { word-break:break-all; }

/* Skills */
.skills-section { width:100%; }
.skill-item { margin-bottom: 12px; }
.skill-info {
  display: flex;
  justify-content: space-between;
  font-size: .82rem;
  margin-bottom: 4px;
}
.skill-info span:first-child { color:var(--text-dim); }
.skill-info span:last-child { color:var(--accent); font-weight:600; }
.skill-bar {
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 1.2s ease;
  position: relative;
}
.skill-fill::after {
  content:'';
  position:absolute; inset:0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.3));
  animation: shimmer 2s infinite;
}
@keyframes shimmer {
  0% { transform:translateX(-100%); }
  100% { transform:translateX(100%); }
}

/* Languages */
.languages-section { width:100%; }
.lang-item {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: .85rem;
  border-bottom: 1px solid var(--border);
}
.lang-item:last-child { border-bottom:none; }
.lang-item span:first-child { color:var(--text); }
.lang-level { color:var(--accent); font-weight:600; font-size:.8rem; }

/* ===== DOWNLOAD BUTTON ===== */
.download-wrap {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 24px;
}
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.download-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 20px rgba(16,185,129,.35);
}
.download-btn:active { transform: scale(.97); }
.download-btn i { font-size: 1rem; }
.download-btn .mob-text { display: none; }

/* Certificate button */
.cert-btn {
  background: linear-gradient(135deg, #f59e0b, #d97706) !important;
}
.cert-btn:hover {
  box-shadow: 0 4px 20px rgba(245,158,11,.35) !important;
}
.cert-btn i { font-size: 1rem; }
.cert-btn.has-file {
  background: linear-gradient(135deg, #3b82f6, #2563eb) !important;
}

.download-btn.loading {
  pointer-events: none;
  opacity: .8;
}

/* ===== RESUME PDF (hidden, for export) ===== */
#resume-pdf {
  position: absolute;
  left: -9999px;
  top: 0;
  width: 794px;
  background: #fff;
  color: #1a1a2e;
  font-family: 'Segoe UI', Arial, sans-serif;
  padding: 40px;
  line-height: 1.5;
  font-size: 12px;
}
#resume-pdf .pdf-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 3px solid #1e3a5f;
  margin-bottom: 20px;
}
#resume-pdf .pdf-corner {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 14px;
  font-weight: 700;
  color: #1e3a5f;
  opacity: 0.6;
  letter-spacing: 0.5px;
}
#resume-pdf .pdf-avatar-img {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid #1e3a5f;
}
#resume-pdf .pdf-header-text h1 {
  font-size: 26px;
  color: #1e3a5f;
  margin: 0;
}
#resume-pdf .pdf-title {
  font-size: 14px;
  color: #4a6a8a;
  margin: 2px 0 0;
}
#resume-pdf .pdf-body {
  display: flex;
  gap: 30px;
}
#resume-pdf .pdf-left {
  width: 240px;
  flex-shrink: 0;
}
#resume-pdf .pdf-right {
  flex: 1;
}
#resume-pdf .pdf-block {
  margin-bottom: 16px;
}
#resume-pdf .pdf-block h3 {
  font-size: 13px;
  font-weight: 700;
  color: #1e3a5f;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid #d0d8e0;
  padding-bottom: 4px;
  margin-bottom: 8px;
}
#resume-pdf .pdf-block p {
  margin: 2px 0;
  font-size: 11px;
  color: #333;
}
#resume-pdf .pdf-exp {
  margin-bottom: 10px;
}
#resume-pdf .pdf-exp-title {
  font-size: 12px !important;
  margin: 0 !important;
}
#resume-pdf .pdf-exp-date {
  font-size: 10px !important;
  color: #6a8aaa !important;
  margin: 0 0 2px !important;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 60px 48px;
  max-width: 900px;
}

/* Sections */
.section { margin-bottom: 48px; }
.section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}
.section h2 i { color: var(--accent); font-size: 1.2rem; }
.section p { color: var(--text-dim); }

/* About */
.about-section p {
  font-size: 1.05rem;
  line-height: 1.8;
  background: var(--card-bg);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content:'';
  position:absolute;
  left:8px;
  top:0;
  bottom:0;
  width:2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 28px;
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.timeline-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}
.timeline-dot {
  position: absolute;
  left: -24px;
  top: 24px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}
.timeline-header h3 {
  font-size: 1.05rem;
  color: var(--text);
}
.company { color: var(--accent); font-size:.85rem; font-weight:500; }
.date {
  display: inline-block;
  font-size:.75rem;
  color: var(--text-dim);
  margin-top: 2px;
}
.timeline-content p {
  margin-top: 8px;
  font-size:.88rem;
}

/* Experience Grid */
.exp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.exp-card {
  background: var(--card-bg);
  padding: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.exp-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.exp-icon i {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 10px;
}
.exp-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text);
}
.exp-card p {
  font-size: .85rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* Education */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.edu-item {
  display: flex;
  gap: 16px;
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.edu-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}
.edu-icon i {
  font-size: 1.8rem;
  color: var(--accent);
}
.edu-item h3 { font-size: 1rem; margin-bottom: 2px; }
.edu-meta { color:var(--accent); font-size:.82rem; }
.edu-item p { font-size:.85rem; margin-top:4px; }

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.project-card {
  background: var(--card-bg);
  padding: 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: default;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.project-icon i {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 10px;
}
.project-card h3 { font-size:.95rem; margin-bottom:4px; }
.project-card p { font-size:.82rem; margin-bottom:10px; }
.project-tag {
  display:inline-block;
  font-size:.7rem;
  padding:2px 10px;
  border-radius:20px;
  background: rgba(0,212,255,.1);
  color: var(--accent);
  border:1px solid rgba(0,212,255,.2);
  margin:2px 3px;
}

/* Contact Form */
.contact-form {
  background: var(--card-bg);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.form-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}
.form-row input { flex:1; }
.contact-form input,
.contact-form textarea {
  width:100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size:.9rem;
  font-family:inherit;
  outline:none;
  transition: border var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,255,.15);
}
.contact-form textarea { resize:vertical; margin-bottom:12px; }
.contact-form button {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size:.9rem;
  font-weight:600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.contact-form button:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 20px rgba(0,212,255,.3);
}
.contact-form button:active { transform: scale(.97); }

/* Footer */
.footer {
  text-align: center;
  padding: 20px 0;
  color: var(--text-dim);
  font-size:.8rem;
  border-top: 1px solid var(--border);
}

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

/* =========================================================
   TABLET / MOBILE
   ========================================================= */
@media (max-width: 900px) {
  .sidebar { display:none; }
  .mobile-header { display:flex; }
  .main-content { margin-left:0; padding: 24px 16px 90px; }
  .container { flex-direction:column; }

  /* Mobile header */
  .mobile-header {
    flex-direction: column;
    align-items: center;
    padding: 40px 16px 20px;
    background: linear-gradient(135deg, var(--surface), var(--card-bg));
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
  }
  .mobile-header::before {
    content:'';
    position:absolute;
    top:-50%; left:-50%;
    width:200%; height:200%;
    background: radial-gradient(circle at 30% 40%, rgba(0,212,255,.06), transparent 60%);
    pointer-events:none;
  }
  .mobile-photo {
    width: 100px; height: 100px;
    position: relative;
    z-index: 1;
  }
  .mobile-photo .avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--accent);
  }
  .mobile-title {
    text-align: center;
    position: relative;
    z-index: 1;
    margin-top: 12px;
  }
  .mobile-title h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .mobile-title .subtitle {
    color: var(--text-dim);
    font-size: .85rem;
  }

  /* Mobile bottom nav */
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    justify-content: space-around;
    padding: 6px 0 env(safe-area-inset-bottom, 6px);
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-dim);
    font-size: .6rem;
    padding: 4px 8px;
    transition: color var(--transition);
    gap: 2px;
  }
  .nav-link i { font-size: 1.1rem; transition: color var(--transition); }
  .nav-link.active { color: var(--accent); }
  .nav-link.active i { color: var(--accent); }

  /* Section mobile animations */
  .section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp .5s ease forwards;
  }
  .section:nth-child(1) { animation-delay:.1s; }
  .section:nth-child(2) { animation-delay:.2s; }
  .section:nth-child(3) { animation-delay:.3s; }
  .section:nth-child(4) { animation-delay:.4s; }
  .section:nth-child(5) { animation-delay:.5s; }
  @keyframes fadeUp {
    to { opacity:1; transform:translateY(0); }
  }

  .download-wrap { justify-content:stretch; }
  .cert-btn { display: none !important; }
  .download-btn {
    width: 100%;
    justify-content: center;
    padding: 14px 22px;
    font-size: .95rem;
    border-radius: var(--radius);
  }
  .download-btn .dt-text { display: none; }
  .download-btn .mob-text { display: inline; }

  .form-row { flex-direction:column; }
  .project-grid { grid-template-columns:1fr; }
  .exp-grid { grid-template-columns:1fr; }
  .timeline { padding-left:20px; }
  .timeline-dot { left: -16px; width:12px; height:12px; }
}

/* ===== DARK MODE SAFE / HIGH-DPI ===== */
@media (prefers-reduced-motion:reduce) {
  * { animation-duration:.01ms !important; transition-duration:.01ms !important; }
}