/* ============================================================
   PORTFOLIO – RAYANUL KADER CHOWDHURY ABID
   Modern Dark Theme with Gradient Accents
   ============================================================ */

/* ─── RESET & BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  background: #0a0a0f;
  color: #e2e8f0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ─── CUSTOM PROPERTIES ─── */
:root {
  --accent:       #00d4ff;
  --accent2:      #7c3aed;
  --accent3:      #f472b6;
  --bg:           #0a0a0f;
  --bg-alt:       #0f0f1a;
  --bg-card:      rgba(255,255,255,0.04);
  --bg-card-hover:rgba(255,255,255,0.07);
  --border:       rgba(255,255,255,0.08);
  --text:         #e2e8f0;
  --text-muted:   #94a3b8;
  --radius:       14px;
  --radius-sm:    8px;
  --shadow:       0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:    0 20px 60px rgba(0,0,0,0.5);
  --transition:   0.3s cubic-bezier(0.4,0,0.2,1);
  --nav-h:        70px;
  --gradient:     linear-gradient(135deg, #00d4ff, #7c3aed);
  --gradient2:    linear-gradient(135deg, #7c3aed, #f472b6);
}

/* ─── TYPOGRAPHY ─── */
h1,h2,h3,h4 { font-weight: 700; line-height: 1.2; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent2); border-radius: 3px; }

/* ─── CONTAINER ─── */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ─── SECTION ─── */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,212,255,0.08);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.section-title { font-size: clamp(2rem,4vw,2.8rem); color: #fff; }
.section-subheader { margin-top: 64px; margin-bottom: 32px; }
.section-subtitle { font-size: clamp(1.4rem,3vw,2rem); color: #fff; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px;
  border-radius: 50px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,212,255,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,212,255,0.4); }
.btn-outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn-outline:hover { background: rgba(0,212,255,0.08); transform: translateY(-2px); }
.btn-full { width: 100%; justify-content: center; }

/* ─── TECH TAGS ─── */
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag {
  font-size: 0.75rem; font-weight: 500;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(124,58,237,0.15);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.25);
  transition: var(--transition);
}
.tag:hover { background: rgba(124,58,237,0.3); }

/* ─── FADE-UP ANIMATION ─── */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ══════════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════════ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.nav-container {
  width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem; font-weight: 700;
  color: #fff;
  transition: var(--transition);
}
.nav-logo:hover { color: var(--accent); }
.logo-bracket { color: var(--accent); }
.nav-links {
  display: flex; align-items: center; gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: #fff; background: rgba(255,255,255,0.06); }
.nav-cta {
  background: var(--gradient) !important;
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 50px;
  margin-left: 8px;
}
.nav-cta: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: 24px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ══════════════════════════════════════════════
   HERO
══════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 20%, rgba(124,58,237,0.08) 0%, transparent 60%),
              var(--bg);
}
#particleCanvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}
.hero-content { position: relative; z-index: 1; padding: 20px; }
.hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem; color: var(--accent);
  margin-bottom: 16px;
  animation: fadeInDown 0.6s ease both;
}
.hero-name {
  font-size: clamp(2.8rem,7vw,5.5rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  animation: fadeInDown 0.7s 0.1s ease both;
}
.hero-title-wrap {
  font-size: clamp(1.1rem,2.5vw,1.4rem);
  font-weight: 400; color: var(--text-muted);
  margin-bottom: 16px;
  min-height: 2em;
  animation: fadeInDown 0.7s 0.2s ease both;
}
.hero-typed { color: var(--accent); font-weight: 600; }
.typed-cursor {
  color: var(--accent);
  animation: blink 1s infinite;
  font-weight: 300;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.hero-location {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.9rem; color: var(--text-muted);
  margin-bottom: 36px;
  animation: fadeInDown 0.7s 0.3s ease both;
}
.hero-actions {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 40px;
  animation: fadeInDown 0.7s 0.4s ease both;
}
.hero-socials {
  display: flex; gap: 16px; justify-content: center;
  animation: fadeInDown 0.7s 0.5s ease both;
}
.social-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}
.social-icon svg { width: 20px; height: 20px; }
.social-icon:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,212,255,0.08); transform: translateY(-3px); }
.social-icon-sm { width: 36px; height: 36px; }
.social-icon-sm svg { width: 16px; height: 16px; }
.hero-scroll-indicator {
  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-muted); letter-spacing: 0.1em; text-transform: uppercase;
  animation: fadeIn 1s 1s ease both;
}
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s infinite;
}
@keyframes scrollPulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
@keyframes fadeInDown { from{opacity:0;transform:translateY(-20px)} to{opacity:1;transform:none} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }

/* ══════════════════════════════════════════════
   ABOUT
══════════════════════════════════════════════ */
.about-grid {
  display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; align-items: start;
}
.about-avatar-wrap { display: flex; flex-direction: column; align-items: center; gap: 28px; }
.about-avatar {
  position: relative; width: 200px; height: 200px;
  display: flex; align-items: center; justify-content: center;
}
.avatar-initials {
  width: 160px; height: 160px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; font-weight: 800; color: #fff;
  z-index: 1; position: relative;
  box-shadow: 0 0 40px rgba(0,212,255,0.3);
}
.avatar-ring {
  position: absolute; border-radius: 50%; border: 1.5px solid;
}
.ring1 {
  width: 190px; height: 190px; inset: 5px;
  border-color: rgba(0,212,255,0.3);
  animation: spin 12s linear infinite;
}
.ring2 {
  width: 220px; height: 220px; inset: -10px;
  border-color: rgba(124,58,237,0.2);
  animation: spin 20s linear infinite reverse;
}
@keyframes spin { to{transform:rotate(360deg)} }
.about-contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px; width: 100%;
  display: flex; flex-direction: column; gap: 12px;
}
.contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.82rem; color: var(--text-muted);
}
.contact-item svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 2px; color: var(--accent); }
.about-summary { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 16px; }
.about-summary strong { color: var(--text); }
.about-stats {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-top: 32px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px; text-align: center;
  transition: var(--transition);
}
.stat-card:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.3); transform: translateY(-3px); }
.stat-number { display: block; font-size: 1.8rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.75rem; color: var(--text-muted); }

/* ══════════════════════════════════════════════
   TIMELINE (Experience & Education)
══════════════════════════════════════════════ */
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
  content: '';
  position: absolute; left: 11px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2), transparent);
  border-radius: 1px;
}
.timeline-item { position: relative; padding-bottom: 48px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute; left: -28px; top: 20px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--gradient);
  border: 3px solid var(--bg-alt);
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.section:not(.section-alt) .timeline-dot { border-color: var(--bg); }
.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.timeline-card:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.2); box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.timeline-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 12px; margin-bottom: 10px; flex-wrap: wrap;
}
.timeline-title { font-size: 1.2rem; color: #fff; margin-bottom: 4px; }
.timeline-type {
  font-size: 0.75rem; font-weight: 500;
  background: rgba(244,114,182,0.15); color: #f472b6;
  padding: 2px 10px; border-radius: 20px;
  border: 1px solid rgba(244,114,182,0.2);
  margin-left: 8px;
}
.timeline-org { font-size: 0.9rem; color: var(--accent); }
.timeline-badge {
  font-size: 0.72rem; font-weight: 600;
  padding: 4px 12px; border-radius: 20px;
  background: rgba(0,212,255,0.12); color: var(--accent);
  border: 1px solid rgba(0,212,255,0.2);
  white-space: nowrap;
}
.timeline-date {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.82rem; color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 16px;
}
.timeline-date svg { width: 14px; height: 14px; flex-shrink: 0; }
.timeline-list { padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.timeline-list li {
  list-style: disc;
  font-size: 0.92rem; color: var(--text-muted);
  padding-left: 4px;
}
.timeline-list li::marker { color: var(--accent); }
.timeline-list strong { color: var(--text); }
.timeline-coursework { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; margin-top: 8px; }
.timeline-coursework strong { color: var(--text); }

/* ══════════════════════════════════════════════
   SKILLS
══════════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.skill-category-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0,212,255,0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.skill-cat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.skill-cat-icon svg { width: 22px; height: 22px; color: #fff; }
.skill-cat-title { font-size: 1.05rem; color: #fff; margin-bottom: 14px; }
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-pill {
  font-size: 0.78rem; font-weight: 500;
  padding: 5px 13px; border-radius: 20px;
  background: rgba(0,212,255,0.08);
  color: var(--accent);
  border: 1px solid rgba(0,212,255,0.18);
  transition: var(--transition);
}
.skill-pill:hover { background: rgba(0,212,255,0.18); }

/* ══════════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; flex-direction: column; gap: 10px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s ease;
}
.project-card:hover { background: var(--bg-card-hover); transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.project-card:hover::before { transform: scaleX(1); }
.project-card-top { display: flex; justify-content: space-between; align-items: flex-start; }
.project-icon { font-size: 2rem; }
.project-link {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; border: 1px solid var(--border);
  color: var(--text-muted); transition: var(--transition);
}
.project-link svg { width: 16px; height: 16px; }
.project-link:hover { color: var(--accent); border-color: var(--accent); background: rgba(0,212,255,0.08); }
.project-title { font-size: 1.1rem; color: #fff; }
.project-subtitle { font-size: 0.8rem; color: var(--accent); font-weight: 500; }
.project-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; flex: 1; }
.projects-cta { text-align: center; }

/* ══════════════════════════════════════════════
   ACHIEVEMENTS
══════════════════════════════════════════════ */
.achievements-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex; gap: 24px; align-items: flex-start;
  transition: var(--transition);
}
.achievement-card:hover { background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: var(--shadow); }
.achievement-medal { font-size: 2.8rem; flex-shrink: 0; }
.achievement-title { font-size: 1.1rem; color: #fff; margin-bottom: 4px; }
.achievement-event { font-size: 0.82rem; color: var(--accent); font-weight: 600; margin-bottom: 10px; }
.achievement-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }
.achievement-list { margin-top: 10px; padding-left: 20px; display: flex; flex-direction: column; gap: 5px; }
.achievement-list li { list-style: disc; font-size: 0.85rem; color: var(--text-muted); }
.achievement-list li::marker { color: var(--accent); }

/* ══════════════════════════════════════════════
   CO-CURRICULAR
══════════════════════════════════════════════ */
.cocurricular-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cocurricular-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; gap: 20px; align-items: flex-start;
  transition: var(--transition);
}
.cocurricular-card:hover { background: var(--bg-card-hover); transform: translateY(-3px); }
.cocurricular-icon { font-size: 2rem; flex-shrink: 0; }
.cocurricular-title { font-size: 1.05rem; color: #fff; margin-bottom: 4px; }
.cocurricular-org { font-size: 0.82rem; color: var(--accent); font-weight: 500; margin-bottom: 4px; }
.cocurricular-role { font-size: 0.78rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; margin-bottom: 10px; }
.cocurricular-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

/* ══════════════════════════════════════════════
   CONTACT
══════════════════════════════════════════════ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-intro { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 32px; line-height: 1.8; }
.contact-details { display: flex; flex-direction: column; gap: 16px; }
.contact-detail-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition); color: inherit;
}
.contact-detail-item:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.2); transform: translateX(4px); }
.contact-detail-icon {
  width: 42px; height: 42px; border-radius: var(--radius-sm);
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-detail-icon svg { width: 18px; height: 18px; color: #fff; }
.contact-detail-label { display: block; font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 2px; }
.contact-detail-value { display: block; font-size: 0.88rem; color: var(--text); font-weight: 500; word-break: break-all; }

/* Contact Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text); font-family: inherit; font-size: 0.95rem;
  transition: var(--transition); resize: vertical;
  outline: none;
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
  background: rgba(0,212,255,0.03);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); opacity: 0.6; }
.form-note { font-size: 0.85rem; color: var(--accent); min-height: 1.4em; }

/* ══════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════ */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 36px 0;
}
.footer-content {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px;
}
.footer-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem; font-weight: 700; color: #fff;
}
.footer-copy { font-size: 0.85rem; color: var(--text-muted); }
.footer-copy strong { color: var(--text); }
.footer-socials { display: flex; gap: 12px; }

/* ─── BACK TO TOP ─── */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 900;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  color: #fff; box-shadow: 0 4px 16px rgba(0,212,255,0.35);
  opacity: 0; pointer-events: none;
  transition: var(--transition);
}
.back-to-top svg { width: 20px; height: 20px; }
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); }

/* ══════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-avatar-wrap { flex-direction: row; justify-content: flex-start; align-items: flex-start; flex-wrap: wrap; }
  .about-stats { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column; padding: 20px 24px 28px;
    gap: 4px; border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-link { width: 100%; text-align: left; padding: 12px 16px; }
  .nav-cta { margin-left: 0; text-align: center; }
  .hamburger { display: flex; }
  .hero-name { font-size: clamp(2.2rem,10vw,3.5rem); }
  .section { padding: 72px 0; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: 1fr; }
  .cocurricular-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-stats { grid-template-columns: repeat(2,1fr); }
  .footer-content { flex-direction: column; text-align: center; }
  .timeline { padding-left: 24px; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .achievement-card { flex-direction: column; gap: 12px; }
  .cocurricular-card { flex-direction: column; gap: 12px; }
  .contact-form-wrap { padding: 24px; }
  .back-to-top { bottom: 20px; right: 20px; }
}