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

:root {
  --bg-primary:    #090e1a;
  --bg-secondary:  #0d1526;
  --bg-card:       #111c30;
  --bg-glass:      rgba(17,28,48,.6);
  --accent:        #6c63ff;
  --accent-2:      #00d4ff;
  --accent-grad:   linear-gradient(135deg, #6c63ff 0%, #00d4ff 100%);
  --accent-glow:   rgba(108,99,255,.35);
  --text-primary:  #e8eaf6;
  --text-secondary:#9aa3b8;
  --text-muted:    #5a6480;
  --border:        rgba(108,99,255,.18);
  --border-hover:  rgba(108,99,255,.5);
  --radius:        16px;
  --radius-sm:     8px;
  --shadow:        0 8px 40px rgba(0,0,0,.5);
  --shadow-glow:   0 0 40px rgba(108,99,255,.2);
  --nav-h:         70px;
  --transition:    .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

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

::selection { background: var(--accent); color: #fff; }

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

/* ── TYPOGRAPHY ── */
.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── CONTAINER ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.8rem;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.btn-outline:hover {
  background: var(--bg-glass);
  border-color: var(--accent);
  transform: translateY(-3px);
}
.btn-full { width: 100%; justify-content: center; }

/* ── SECTION SHARED ── */
section { padding: 110px 0; }

.section-label {
  font-family: 'Fira Code', monospace;
  color: var(--accent);
  font-size: .85rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: .5rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 3rem;
  line-height: 1.2;
}

/* ════════════════════════════════════════════
   NAVBAR
════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(9,14,26,.85);
  backdrop-filter: blur(20px);
  border-color: var(--border);
}
.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: 'Fira Code', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
.nav-logo:hover { text-shadow: 0 0 20px var(--accent); }
.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent-grad);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ════════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108,99,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,99,255,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}
@keyframes gridMove {
  0%   { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.glow-1 {
  width: 500px; height: 500px;
  background: rgba(108,99,255,.15);
  top: -100px; left: -100px;
  animation: floatGlow 8s ease-in-out infinite;
}
.glow-2 {
  width: 400px; height: 400px;
  background: rgba(0,212,255,.1);
  bottom: -80px; right: -80px;
  animation: floatGlow 10s ease-in-out infinite reverse;
}
@keyframes floatGlow {
  0%, 100% { transform: translate(0,0); }
  50%       { transform: translate(30px, 30px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
  padding: 2rem 1.5rem;
  animation: heroFadeIn .9s ease both;
}
@keyframes heroFadeIn {
  from { opacity:0; transform: translateY(30px); }
  to   { opacity:1; transform: translateY(0); }
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: .75rem;
  animation: heroFadeIn .9s .1s ease both;
}
.hero-name {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: .5rem;
  animation: heroFadeIn .9s .2s ease both;
}
.hero-title {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 400;
  color: var(--text-secondary);
  min-height: 2.5rem;
  margin-bottom: 1.5rem;
  animation: heroFadeIn .9s .3s ease both;
}
.typewriter { color: var(--accent-2); font-weight: 600; }
.cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
  font-weight: 300;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0; } }

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2rem;
  animation: heroFadeIn .9s .4s ease both;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  animation: heroFadeIn .9s .5s ease both;
}
.hero-socials {
  display: flex;
  gap: 1rem;
  justify-content: center;
  animation: heroFadeIn .9s .6s ease both;
}
.social-icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1rem;
  transition: var(--transition);
}
.social-icon:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-3px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  color: var(--text-muted);
  font-size: .75rem;
  letter-spacing: .1em;
  animation: heroFadeIn 1s 1s ease both;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { opacity:1; transform: scaleY(1); }
  50%      { opacity:.4; transform: scaleY(.7); }
}

/* ════════════════════════════════════════════
   ABOUT
════════════════════════════════════════════ */
#about { background: var(--bg-secondary); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 4rem;
  align-items: start;
}

.about-avatar-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}
.about-avatar {
  position: relative;
  width: 200px; height: 200px;
}
.avatar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent-grad);
  animation: spinRing 8s linear infinite;
  padding: 3px;
}
@keyframes spinRing {
  to { transform: rotate(360deg); }
}
.avatar-inner {
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--bg-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem;
  color: var(--accent);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  width: 100%;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem .5rem;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.stat-num {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: .72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1rem;
}
.about-text strong { color: var(--text-primary); }

/* ════════════════════════════════════════════
   SKILLS
════════════════════════════════════════════ */
#skills { background: var(--bg-primary); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(30px);
}
.skill-category.visible {
  opacity: 1;
  transform: translateY(0);
}
.skill-category:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}
.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.skill-cat-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.skill-cat-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: .6rem; }
.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(108,99,255,.1);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: .35rem .85rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 500;
  transition: var(--transition);
}
.skill-tag:hover {
  background: rgba(108,99,255,.25);
  border-color: var(--accent);
  color: var(--text-primary);
  transform: scale(1.05);
}

/* ════════════════════════════════════════════
   PROJECTS
════════════════════════════════════════════ */
#projects { background: var(--bg-secondary); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.8rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(30px);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent-grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}
.project-card:hover::before { transform: scaleX(1); }
.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-8px);
}

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.project-icon {
  width: 50px; height: 50px;
  border-radius: var(--radius-sm);
  background: rgba(108,99,255,.12);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  color: var(--accent);
}
.project-links {
  display: flex;
  gap: .75rem;
}
.project-links a {
  color: var(--text-muted);
  font-size: 1.1rem;
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}
.project-links a:hover { color: var(--accent); transform: translateY(-2px); }

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
}
.project-desc {
  color: var(--text-secondary);
  font-size: .93rem;
  flex: 1;
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.project-techs span {
  background: rgba(0,212,255,.08);
  border: 1px solid rgba(0,212,255,.2);
  color: var(--accent-2);
  padding: .25rem .7rem;
  border-radius: 50px;
  font-size: .78rem;
  font-family: 'Fira Code', monospace;
}

.project-footer {
  border-top: 1px solid var(--border);
  padding-top: .75rem;
}
.project-status {
  color: var(--text-muted);
  font-size: .8rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.project-status i { color: #22c55e; font-size: .5rem; }

/* ════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════ */
#contact { background: var(--bg-primary); }

.contact-sub {
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 3rem;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.contact-info-icon {
  width: 46px; height: 46px;
  border-radius: var(--radius-sm);
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.contact-info-label {
  font-size: .78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .2rem;
}
.contact-info-value {
  color: var(--text-primary);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.contact-info-value:hover { color: var(--accent); }

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .5rem; }
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.form-group input,
.form-group textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: .95rem;
  transition: var(--transition);
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,99,255,.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-success {
  display: none;
  text-align: center;
  color: #22c55e;
  font-size: .9rem;
  font-weight: 500;
  padding: .5rem;
}
.form-success.show { display: block; animation: heroFadeIn .4s ease; }

/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
#footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-logo {
  font-family: 'Fira Code', monospace;
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
}
.footer-copy { color: var(--text-muted); font-size: .85rem; }
.footer-socials { display: flex; gap: 1rem; }
.footer-socials a {
  color: var(--text-muted);
  font-size: 1.1rem;
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}
.footer-socials a:hover { color: var(--accent); transform: translateY(-2px); }

/* ── BACK TO TOP ── */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent-grad);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none;
  font-size: .9rem;
  box-shadow: 0 4px 20px var(--accent-glow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover { transform: translateY(-4px); }

/* ════════════════════════════════════════════
   INTERSECTION OBSERVER – STAGGER DELAYS
════════════════════════════════════════════ */
[data-delay="0"]   { transition-delay: 0ms; }
[data-delay="100"] { transition-delay: 100ms; }
[data-delay="150"] { transition-delay: 150ms; }
[data-delay="200"] { transition-delay: 200ms; }
[data-delay="300"] { transition-delay: 300ms; }

/* ════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-avatar-wrap { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .about-stats { width: auto; }
  .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 650px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(9,14,26,.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { max-height: 300px; }
  .nav-links li { width: 100%; text-align: center; }
  .nav-links a { display: block; padding: 1rem; }
  .hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: repeat(3,1fr); }
}