/* ═══════════════════════════════════════════════════
   Md Mehedi Hassan — Portfolio Stylesheet
   Aesthetic: Dark Cyberpunk-Minimalist, Green Accent
   Fonts: Syne (display) + DM Sans (body)
═══════════════════════════════════════════════════ */

/* ── CUSTOM PROPERTIES ─────────────────────────── */
:root {
  /* Dark Theme (default) */
  --bg:        #0a0f0d;
  --bg2:       #0d1410;
  --bg3:       #111a16;
  --surface:   #141f1a;
  --surface2:  #1a2820;
  --border:    rgba(0,255,120,0.12);
  --text:      #e8f4ef;
  --text2:     #9ab8a8;
  --text3:     #6a8f7a;
  --accent:    #00e87c;
  --accent2:   #00c062;
  --accent-glow: rgba(0,232,124,0.18);
  --accent-glow2: rgba(0,232,124,0.06);
  --card:      rgba(20,31,26,0.85);
  --glass:     rgba(20,31,26,0.6);
  --shadow:    0 8px 40px rgba(0,0,0,0.5);
  --shadow-sm: 0 2px 16px rgba(0,0,0,0.35);
  --radius:    16px;
  --radius-sm: 10px;
  --nav-h:     72px;
  --transition: 0.35s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="light"] {
  --bg:        #f0f7f3;
  --bg2:       #e8f5ee;
  --bg3:       #dff0e7;
  --surface:   #ffffff;
  --surface2:  #f4faf7;
  --border:    rgba(0,180,80,0.18);
  --text:      #0d2018;
  --text2:     #2d5440;
  --text3:     #5a7a6a;
  --accent:    #00a855;
  --accent2:   #008f46;
  --accent-glow: rgba(0,168,85,0.15);
  --accent-glow2: rgba(0,168,85,0.05);
  --card:      rgba(255,255,255,0.9);
  --glass:     rgba(255,255,255,0.7);
  --shadow:    0 8px 40px rgba(0,80,30,0.12);
  --shadow-sm: 0 2px 16px rgba(0,80,30,0.08);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

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

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

::selection { background: var(--accent); color: #000; }

/* ── SCROLLBAR ──────────────────────────────────── */
::-webkit-scrollbar       { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent2); border-radius: 4px; }

/* ── PARTICLES ──────────────────────────────────── */
#particles-canvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
  opacity: 0.6;
}

/* ── LOADER ─────────────────────────────────────── */
#loader {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s, visibility 0.6s;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-inner { text-align: center; }

.loader-name {
  font-family: 'Syne', sans-serif;
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 4px;
  display: block;
  animation: loaderPulse 1s ease-in-out infinite alternate;
}
@keyframes loaderPulse {
  from { opacity: 0.4; text-shadow: 0 0 8px var(--accent); }
  to   { opacity: 1;   text-shadow: 0 0 32px var(--accent), 0 0 64px var(--accent); }
}

.loader-bar {
  width: 200px; height: 3px;
  background: var(--surface2);
  border-radius: 2px;
  margin: 20px auto 0;
  overflow: hidden;
}
.loader-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  animation: loaderBar 1.8s ease-in-out forwards;
}
@keyframes loaderBar { to { width: 100%; } }

/* ── NAVBAR ─────────────────────────────────────── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: all var(--transition);
}
#navbar.scrolled {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 2px;
}
.nav-logo .dot { color: var(--accent); }

.nav-links {
  display: flex; gap: 8px; align-items: center;
}
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text2);
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}
.nav-links a:hover {
  color: var(--accent);
  background: var(--accent-glow2);
}

.nav-actions { display: flex; align-items: center; gap: 12px; }

#theme-toggle {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2);
  transition: all var(--transition);
  background: var(--surface);
  font-size: 0.9rem;
}
#theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.hamburger span {
  width: 18px; height: 2px;
  background: var(--text2);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── HERO ───────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--nav-h) + 40px) 24px 60px;
  position: relative; z-index: 1;
}

.hero-content {
  max-width: 1100px; width: 100%;
  display: flex; align-items: center; gap: 64px;
  flex-wrap: wrap; justify-content: center;
}

.hero-photo-wrap {
  position: relative; flex-shrink: 0;
}

.hero-photo-ring {
  position: absolute; inset: -12px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: conic-gradient(var(--accent), transparent, var(--accent2), transparent, var(--accent)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  animation: ringRotate 6s linear infinite;
}
@keyframes ringRotate { to { transform: rotate(360deg); } }

.hero-photo {
  width: 260px; height: 260px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg);
  position: relative; z-index: 1;
  box-shadow: 0 0 40px var(--accent-glow), var(--shadow);
}

.status-badge {
  position: absolute; bottom: 16px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 0.76rem;
  font-weight: 500;
  white-space: nowrap;
  display: flex; align-items: center; gap: 7px;
}
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.5s ease infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(0,232,124,0.5); }
  50%      { box-shadow: 0 0 0 6px rgba(0,232,124,0); }
}

.hero-text { flex: 1; min-width: 280px; }

.hero-greeting {
  font-size: 1rem; color: var(--accent);
  font-weight: 500; letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 8px;
}

.hero-name {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.hero-title {
  font-size: 1rem; color: var(--text2);
  font-weight: 400; letter-spacing: 1px;
  margin-bottom: 16px;
}

.hero-typed-wrap {
  font-size: 1.1rem; color: var(--text2);
  margin-bottom: 16px; min-height: 1.7em;
}
.typed-text { color: var(--accent); font-weight: 600; }
.cursor-blink {
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1}50%{opacity:0} }

.hero-intro {
  font-size: 1rem; color: var(--text2);
  max-width: 520px; margin-bottom: 28px;
  line-height: 1.75;
}

.hero-btns { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }

/* ── BUTTONS ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn-outline:hover {
  background: var(--accent-glow2);
  transform: translateY(-2px);
}
.btn-ghost {
  border: 1.5px solid var(--border);
  color: var(--text2);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn.full-width { width: 100%; justify-content: center; }

.hero-socials {
  display: flex; gap: 12px;
}
.hero-socials a {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem;
  color: var(--text2);
  transition: all var(--transition);
}
.hero-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow2);
  transform: translateY(-3px);
}

.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  gap: 8px; color: var(--text3); font-size: 0.75rem;
  letter-spacing: 2px; text-transform: uppercase;
  animation: float 2.5s ease-in-out infinite;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
@keyframes float { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(-8px)} }

/* ── SECTION COMMON ─────────────────────────────── */
section { padding: 100px 24px; position: relative; z-index: 1; }
section:nth-child(even) { background: var(--bg2); }

.container { max-width: 1100px; margin: 0 auto; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  font-size: 0.78rem; font-weight: 600;
  color: var(--accent); letter-spacing: 3px;
  text-transform: uppercase;
  display: inline-block; margin-bottom: 10px;
}
.section-header h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.5px;
}
.accent { color: var(--accent); }

/* ── REVEAL ANIMATIONS ──────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── ABOUT ──────────────────────────────────────── */
.about-grid {
  display: grid; grid-template-columns: 1fr 1.6fr;
  gap: 60px; align-items: center;
}

.about-image-wrap {
  position: relative;
}
.about-img {
  width: 100%; border-radius: var(--radius);
  border: 2px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 3/4; object-fit: cover;
}
.about-img-badge {
  position: absolute; bottom: -20px; right: -20px;
  background: var(--accent);
  color: #000;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 0.95rem;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.about-details h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.8rem; font-weight: 800;
  margin-bottom: 16px;
}
.about-details p { color: var(--text2); margin-bottom: 16px; }

.about-cards {
  display: flex; flex-direction: column; gap: 14px;
  margin: 24px 0;
}
.about-card {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  transition: all var(--transition);
}
.about-card:hover {
  border-color: var(--accent);
  background: var(--surface2);
  transform: translateX(6px);
}
.about-card i { font-size: 1.2rem; margin-top: 2px; flex-shrink: 0; }
.about-card strong { display: block; margin-bottom: 4px; font-size: 0.9rem; }
.about-card p { color: var(--text2); margin: 0; font-size: 0.88rem; }

.about-info-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-top: 20px;
}
.about-info-grid div {
  font-size: 0.88rem; color: var(--text2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 14px;
}
.about-info-grid span { color: var(--accent); font-weight: 600; margin-right: 6px; }

/* ── EDUCATION ──────────────────────────────────── */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: '';
  position: absolute; left: 16px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative; margin-bottom: 48px;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute; left: -34px; top: 4px;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--surface2);
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; color: var(--text2);
  transition: all var(--transition);
}
.timeline-dot.current {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-card {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: all var(--transition);
}
.timeline-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.timeline-card.active { border-color: var(--accent); box-shadow: 0 0 24px var(--accent-glow); }

.timeline-year {
  font-size: 0.78rem; font-weight: 600;
  color: var(--accent); letter-spacing: 1.5px;
  text-transform: uppercase; display: block; margin-bottom: 8px;
}
.timeline-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.15rem; font-weight: 700; margin-bottom: 8px;
}
.timeline-place {
  font-size: 0.87rem; color: var(--text3);
  margin-bottom: 12px; display: flex; align-items: center; gap: 6px;
}
.timeline-card p { color: var(--text2); font-size: 0.93rem; margin-bottom: 14px; }

.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.timeline-tags span {
  font-size: 0.75rem; font-weight: 600;
  padding: 4px 10px; border-radius: 100px;
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  color: var(--accent);
}

/* ── SKILLS ─────────────────────────────────────── */
.skills-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.skills-category {
  font-family: 'Syne', sans-serif;
  font-size: 1rem; font-weight: 700;
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 10px;
}

.skill-item { margin-bottom: 20px; }
.skill-label {
  display: flex; justify-content: space-between;
  font-size: 0.9rem; font-weight: 500; margin-bottom: 8px;
}
.skill-pct { color: var(--accent); font-weight: 600; }

.skill-bar {
  height: 8px; background: var(--surface2);
  border-radius: 100px; overflow: hidden;
}
.skill-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 100px;
  transition: width 1.4s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 10px var(--accent-glow);
}

.skill-bubbles {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 48px; justify-content: center;
}
.skill-bubbles span {
  font-size: 0.83rem; font-weight: 500;
  padding: 6px 16px; border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  cursor: default;
  transition: all var(--transition);
}
.skill-bubbles span:hover {
  background: var(--accent-glow2);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── PROJECTS ───────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.project-img-wrap { position: relative; overflow: hidden; }
.project-img-wrap img {
  width: 100%; height: 200px; object-fit: cover;
  transition: transform 0.6s ease;
}
.project-card:hover .project-img-wrap img { transform: scale(1.07); }

.project-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex; align-items: center; justify-content: center; gap: 16px;
  opacity: 0; transition: opacity var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }
.proj-link {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #000;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transform: translateY(12px);
  transition: all var(--transition);
}
.project-card:hover .proj-link { transform: translateY(0); }

.project-body { padding: 22px 24px; }
.project-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.project-tags span {
  font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 100px;
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  color: var(--accent);
}
.project-body h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem; font-weight: 700; margin-bottom: 8px;
}
.project-body p { font-size: 0.88rem; color: var(--text2); line-height: 1.65; }

/* ── CERTIFICATES ───────────────────────────────── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; gap: 18px;
  transition: all var(--transition);
}
.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.cert-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  border-radius: 12px;
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--accent);
}
.cert-icon.trophy { color: #f5c518; background: rgba(245,197,24,0.1); }
.cert-icon.star   { color: #f5c518; background: rgba(245,197,24,0.1); }
.cert-icon.workshop { color: #60a5fa; background: rgba(96,165,250,0.1); }

.cert-issuer {
  font-size: 0.73rem; font-weight: 600;
  color: var(--accent); letter-spacing: 1px;
  text-transform: uppercase; display: block; margin-bottom: 5px;
}
.cert-body h4 {
  font-family: 'Syne', sans-serif;
  font-size: 0.97rem; font-weight: 700; margin-bottom: 8px;
}
.cert-body p { font-size: 0.83rem; color: var(--text2); line-height: 1.6; margin-bottom: 10px; }
.cert-date { font-size: 0.77rem; color: var(--text3); display: flex; align-items: center; gap: 6px; }

/* ── EXPERIENCE ─────────────────────────────────── */
.exp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(460px, 1fr));
  gap: 20px;
}

.exp-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; gap: 20px;
  transition: all var(--transition);
}
.exp-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.exp-icon {
  width: 50px; height: 50px; flex-shrink: 0;
  border-radius: 14px;
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--accent);
}

.exp-type {
  font-size: 0.72rem; font-weight: 700;
  padding: 3px 10px; border-radius: 100px;
  display: inline-block; margin-bottom: 8px;
}
.exp-type.volunteer { background: rgba(0,232,124,0.15); color: var(--accent); }
.exp-type.intern    { background: rgba(96,165,250,0.15); color: #60a5fa; }
.exp-type.club      { background: rgba(245,197,24,0.15); color: #f5c518; }
.exp-type.leader    { background: rgba(240,120,80,0.15); color: #f07850; }

.exp-content h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem; font-weight: 700; margin-bottom: 6px;
}
.exp-org, .exp-duration {
  font-size: 0.82rem; color: var(--text3);
  display: flex; align-items: center; gap: 6px; margin-bottom: 4px;
}
.exp-content > p:last-child {
  font-size: 0.88rem; color: var(--text2);
  margin-top: 10px; line-height: 1.65;
}

/* ── GALLERY ────────────────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 220px;
  gap: 16px;
}
.gallery-item { position: relative; border-radius: var(--radius); overflow: hidden; cursor: pointer; }
.gallery-item.tall  { grid-row: span 2; }
.gallery-item.wide  { grid-column: span 2; }

.gallery-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
}
.gallery-item:hover img { transform: scale(1.08); }

.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
  display: flex; align-items: flex-end;
  padding: 20px;
  opacity: 0; transition: opacity var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span {
  font-size: 0.88rem; font-weight: 600; color: #fff;
  letter-spacing: 0.5px;
}

/* ── STATS ──────────────────────────────────────── */
#stats { background: var(--bg3); }

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 16px 40px var(--accent-glow);
}
.stat-card i { font-size: 2rem; margin-bottom: 16px; display: block; }
.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 3rem; font-weight: 800;
  color: var(--text); line-height: 1;
  margin-bottom: 8px;
}
.stat-num::after { content: '+'; color: var(--accent); }
.stat-card p { font-size: 0.88rem; color: var(--text2); }

/* ── CONTACT ────────────────────────────────────── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px;
  align-items: start;
}

.contact-info h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.6rem; font-weight: 800; margin-bottom: 14px;
}
.contact-info > p { color: var(--text2); margin-bottom: 28px; }

.contact-item {
  display: flex; align-items: flex-start; gap: 16px;
  margin-bottom: 20px;
}
.contact-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: 12px;
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 1rem;
}
.contact-item strong { display: block; font-size: 0.83rem; color: var(--text3); margin-bottom: 3px; }
.contact-item a, .contact-item span { font-size: 0.93rem; color: var(--text2); }
.contact-item a:hover { color: var(--accent); }

.contact-socials { display: flex; gap: 12px; margin-top: 28px; }
.social-btn {
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2); font-size: 1rem;
  transition: all var(--transition);
}
.social-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  transform: translateY(-3px);
}

/* ── FORM ───────────────────────────────────────── */
.contact-form {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 0.83rem; font-weight: 600;
  color: var(--text2); margin-bottom: 7px; letter-spacing: 0.3px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: inherit; font-size: 0.93rem; color: var(--text);
  outline: none;
  transition: all var(--transition);
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text3); }

.form-success {
  display: none; text-align: center;
  margin-top: 14px; font-size: 0.9rem; color: var(--accent);
  background: var(--accent-glow2);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 10px;
}
.form-success.show { display: block; }

/* ── FOOTER ─────────────────────────────────────── */
#footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 60px 24px 0;
  position: relative; z-index: 1;
}

.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { font-size: 1.8rem; display: inline-block; margin-bottom: 14px; }
.footer-brand p { font-size: 0.88rem; color: var(--text2); line-height: 1.7; margin-bottom: 20px; }
.footer-socials { display: flex; gap: 10px; }
.footer-socials a {
  width: 38px; height: 38px;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2); font-size: 0.9rem;
  transition: all var(--transition);
}
.footer-socials a:hover { color: var(--accent); border-color: var(--accent); }

.footer-links h4, .footer-contact h4 {
  font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700;
  margin-bottom: 20px; color: var(--text);
}
.footer-links ul li a {
  font-size: 0.88rem; color: var(--text2);
  display: block; padding: 4px 0;
  transition: color var(--transition);
}
.footer-links ul li a:hover { color: var(--accent); }
.footer-links ul li a::before { content: '→ '; color: var(--accent); font-size: 0.75rem; }

.footer-contact p {
  font-size: 0.88rem; color: var(--text2);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.83rem; color: var(--text3);
}

/* ── SCROLL TOP ─────────────────────────────────── */
#scroll-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 900;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--accent);
  color: #000; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px var(--accent-glow);
  opacity: 0; visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
}
#scroll-top.visible {
  opacity: 1; visibility: visible; transform: translateY(0);
}
#scroll-top:hover { transform: translateY(-4px); background: var(--accent2); }

/* ── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-image-wrap { max-width: 380px; margin: 0 auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .exp-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  section { padding: 72px 20px; }

  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 10px 16px; border-radius: 8px; font-size: 0.95rem; }
  .hamburger { display: flex; }

  .hero-content { flex-direction: column; text-align: center; gap: 36px; }
  .hero-btns { justify-content: center; }
  .hero-socials { justify-content: center; }
  .hero-intro { margin: 0 auto 28px; }

  .skills-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item.tall { grid-row: span 1; }
  .gallery-item.wide { grid-column: span 2; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .timeline { padding-left: 28px; }
  .timeline::before { left: 8px; }
  .timeline-dot { left: -24px; width: 30px; height: 30px; font-size: 0.75rem; }
}

@media (max-width: 480px) {
  .hero-photo { width: 200px; height: 200px; }
  .projects-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item.wide, .gallery-item.tall { grid-column: span 1; grid-row: span 1; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}