/* ===========================
   ROOT & TOKENS
=========================== */
:root {
  --bg: #0a0a0f;
  --bg-2: #0f0f1a;
  --bg-card: #13131f;
  --bg-card-2: #1a1a2e;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(99,102,241,0.4);
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --text-dim: #555570;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #06b6d4;
  --green: #10b981;
  --gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #06b6d4);
  --gradient-2: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --shadow: 0 20px 60px rgba(0,0,0,0.5);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
  --radius: 16px;
  --radius-sm: 8px;
  --nav-h: 72px;
  --font: 'Inter', sans-serif;
  --font-2: 'Outfit', sans-serif;
}

/* ===========================
   RESET
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ===========================
   UTILITIES
=========================== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 120px 0; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-label {
  font-size: 11px; letter-spacing: 3px; font-weight: 600;
  color: var(--accent); text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-2);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; line-height: 1.2; margin-bottom: 16px;
}
.section-title.centered { text-align: center; }
.section-subtitle {
  text-align: center; color: var(--text-muted);
  font-size: 1.1rem; max-width: 600px;
  margin: 0 auto 60px;
}

/* ===========================
   NAVBAR
=========================== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(10,10,15,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}
#navbar.scrolled { background: rgba(10,10,15,0.95); }
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 40px;
}
.nav-logo {
  font-family: var(--font-2); font-size: 1.5rem; font-weight: 800;
  color: var(--text); margin-right: auto;
}
.dot { color: var(--accent); }
.nav-links { display: flex; list-style: none; gap: 32px; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500; color: var(--text-muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.btn-resume {
  background: var(--gradient-2); color: #fff;
  padding: 10px 22px; border-radius: 8px;
  font-size: 0.85rem; font-weight: 600;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}
.btn-resume:hover { opacity: 0.9; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  justify-content: center; position: relative; overflow: hidden;
  padding-top: var(--nav-h);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.orb {
  position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.3;
  animation: float 8s ease-in-out infinite;
}
.orb-1 { width: 600px; height: 600px; background: #6366f1; top: -100px; left: -150px; animation-delay: 0s; }
.orb-2 { width: 400px; height: 400px; background: #8b5cf6; bottom: -50px; right: -100px; animation-delay: -3s; }
.orb-3 { width: 300px; height: 300px; background: #06b6d4; top: 40%; left: 50%; animation-delay: -5s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(99,102,241,0.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(99,102,241,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; padding: 0 24px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.3);
  color: var(--accent); padding: 8px 18px; border-radius: 100px;
  font-size: 0.85rem; font-weight: 500; margin-bottom: 32px;
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--green);
  animation: pulse 2s ease infinite;
}
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.4;} }
.hero-title {
  font-family: var(--font-2);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 24px; letter-spacing: -1px;
}
.hero-subtitle { font-size: 1.15rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 40px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.btn-primary {
  background: var(--gradient-2); color: #fff;
  padding: 14px 32px; border-radius: 10px; font-weight: 600;
  font-size: 1rem; transition: transform 0.2s, box-shadow 0.2s;
  border: none; cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(99,102,241,0.4); }
.btn-primary.full-width { width: 100%; text-align: center; }
.btn-ghost {
  background: transparent; color: var(--text);
  padding: 14px 32px; border-radius: 10px; font-weight: 600;
  font-size: 1rem; border: 1px solid var(--border);
  transition: border-color 0.2s, background 0.2s;
}
.btn-ghost:hover { border-color: var(--accent); background: rgba(99,102,241,0.05); }
.hero-stats { display: flex; gap: 32px; justify-content: center; align-items: center; }
.stat { text-align: center; }
.stat-number { display: block; font-family: var(--font-2); font-size: 2rem; font-weight: 800; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }
.hero-scroll-hint {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--text-dim); letter-spacing: 2px;
}
.scroll-arrow {
  width: 20px; height: 20px; border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim); transform: rotate(45deg);
  animation: bounce 2s ease infinite;
}
@keyframes bounce { 0%,100%{transform:rotate(45deg) translateY(0);} 50%{transform:rotate(45deg) translateY(4px);} }

/* ===========================
   ABOUT
=========================== */
.about { background: var(--bg-2); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.about-para { color: var(--text-muted); margin-bottom: 20px; font-size: 1.05rem; line-height: 1.8; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.tag {
  background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2);
  color: var(--accent); padding: 6px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 500;
}
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: border-color 0.3s, transform 0.3s;
}
.about-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.card-icon { font-size: 1.8rem; margin-bottom: 12px; }
.about-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.about-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ===========================
   SKILLS
=========================== */
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.skill-category {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  transition: border-color 0.3s;
}
.skill-category:hover { border-color: var(--border-hover); }
.skill-cat-icon { font-size: 2rem; margin-bottom: 12px; }
.skill-category h3 { font-size: 1rem; font-weight: 700; margin-bottom: 24px; }
.skill-bars { display: flex; flex-direction: column; gap: 16px; }
.skill-bar-item { display: flex; flex-direction: column; gap: 6px; }
.skill-bar-item span { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.bar { height: 6px; background: rgba(255,255,255,0.06); border-radius: 100px; overflow: hidden; }
.bar-fill {
  height: 100%; border-radius: 100px;
  background: var(--gradient-2);
  width: 0; transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
}
.bar-fill.animated { width: var(--w); }

/* ===========================
   PROJECTS
=========================== */
.filter-tabs {
  display: flex; gap: 8px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 48px;
}
.filter-btn {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-muted); padding: 8px 20px; border-radius: 100px;
  font-size: 0.85rem; font-weight: 500; cursor: pointer;
  transition: all 0.2s;
}
.filter-btn:hover, .filter-btn.active {
  background: rgba(99,102,241,0.15); border-color: var(--accent); color: var(--accent);
}
.projects-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.project-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  position: relative; overflow: hidden;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column;
}
.project-card:hover {
  transform: translateY(-6px); border-color: var(--border-hover);
  box-shadow: 0 20px 60px rgba(99,102,241,0.15);
}
.project-card.featured { border-color: rgba(99,102,241,0.4); grid-column: span 1; }
.project-glow {
  position: absolute; top: -60px; right: -60px;
  width: 200px; height: 200px; border-radius: 50%;
  background: rgba(99,102,241,0.08); filter: blur(40px);
  pointer-events: none;
}
.project-badge-featured {
  position: absolute; top: 16px; right: 16px;
  background: var(--gradient-2); color: #fff;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 1px;
  padding: 4px 10px; border-radius: 100px;
}
.project-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 16px; }
.project-icon { font-size: 2rem; }
.project-badges { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.badge {
  font-size: 0.7rem; font-weight: 600; padding: 3px 8px;
  border-radius: 4px; letter-spacing: 0.5px;
}
.badge-sql { background: rgba(6,182,212,0.15); color: #06b6d4; }
.badge-python { background: rgba(99,102,241,0.15); color: #818cf8; }
.badge-viz { background: rgba(16,185,129,0.15); color: #10b981; }
.badge-ai { background: rgba(139,92,246,0.15); color: #a78bfa; }
.project-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
.project-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; flex: 1; }
.project-outcomes { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.outcome { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-muted); }
.outcome-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); flex-shrink: 0; }
.project-footer { margin-top: auto; }
.project-link {
  font-size: 0.85rem; font-weight: 600; color: var(--accent);
  transition: color 0.2s, gap 0.2s;
}
.project-link:hover { color: var(--accent-2); }
.project-card.hidden { display: none; }

/* ===========================
   EXPERIENCE / TIMELINE
=========================== */
.experience { background: var(--bg-2); }
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 20px; top: 0; bottom: 0;
  width: 2px; background: var(--border);
}
.timeline-item { position: relative; padding-left: 60px; margin-bottom: 48px; }
.timeline-dot {
  position: absolute; left: 12px; top: 4px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--bg-card); border: 2px solid var(--border);
  transition: border-color 0.3s, background 0.3s;
}
.timeline-dot.active { background: var(--accent); border-color: var(--accent); }
.timeline-item:hover .timeline-dot { border-color: var(--accent); }
.timeline-content {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  transition: border-color 0.3s;
}
.timeline-item:hover .timeline-content { border-color: var(--border-hover); }
.timeline-header {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 16px; margin-bottom: 12px; flex-wrap: wrap;
}
.timeline-header h3 { font-size: 1rem; font-weight: 700; }
.company { display: block; font-size: 0.85rem; color: var(--accent); font-weight: 500; margin-top: 2px; }
.timeline-date { font-size: 0.8rem; color: var(--text-dim); white-space: nowrap; flex-shrink: 0; }
.timeline-content > p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.timeline-skills { display: flex; flex-wrap: wrap; gap: 8px; }
.timeline-skills span {
  background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.15);
  color: var(--text-muted); padding: 4px 10px; border-radius: 6px; font-size: 0.75rem;
}

/* ===========================
   CONTACT
=========================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { font-size: 1.4rem; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; flex-shrink: 0; }
.contact-item h4 { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.contact-item a, .contact-item span { font-size: 0.95rem; color: var(--text-muted); transition: color 0.2s; }
.contact-item a:hover { color: var(--accent); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; }
.form-group input, .form-group textarea {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 18px; color: var(--text);
  font-family: var(--font); font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s; resize: none;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-success { display: none; text-align: center; color: var(--green); font-size: 0.9rem; padding: 12px; }

/* ===========================
   FOOTER
=========================== */
.footer { background: var(--bg-2); border-top: 1px solid var(--border); padding: 40px 0; }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.footer-logo { font-family: var(--font-2); font-size: 1.5rem; font-weight: 800; }
.footer-content > p { font-size: 0.85rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.85rem; color: var(--text-dim); transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-cards { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .nav-links, .btn-resume { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: var(--bg); padding: 40px 24px; gap: 32px;
    z-index: 999;
  }
  .nav-links.open a { font-size: 1.4rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 40px; height: 1px; }
}