@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --black: #000000;
  --dark: #161617;
  --dark2: #1d1d1f;
  --gray: #f5f5f7;
  --white: #ffffff;
  --muted-dark: #86868b;
  --muted-light: #6e6e73;
  --accent: #0071e3;
  --accent-warm: #f56300;
  --radius-card: 28px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease-apple: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--black); color: var(--white); overflow-x: hidden; -webkit-font-smoothing: antialiased; }

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }

/* ==================== NAVBAR ==================== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 52px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px;
  background: rgba(22, 22, 23, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.4s;
}
.nav-logo {
  font-size: 1.3rem; font-weight: 700; letter-spacing: -0.03em;
  color: var(--white); cursor: pointer;
}
.nav-links {
  display: flex; gap: 2.5rem; list-style: none;
}
.nav-links a {
  font-size: 0.78rem; font-weight: 400; color: var(--muted-dark);
  transition: color 0.3s; letter-spacing: 0.01em;
}
.nav-links a:hover { color: var(--white); }
.nav-cta {
  font-size: 0.78rem; font-weight: 500;
  color: var(--accent); cursor: pointer; transition: opacity 0.3s;
}
.nav-cta:hover { opacity: 0.75; }
.nav-mobile-btn { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-mobile-btn span { display: block; width: 22px; height: 1.5px; background: var(--white); margin: 5px 0; transition: 0.3s; border-radius: 1px; }

/* ==================== HERO ==================== */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: var(--black);
  position: relative; overflow: hidden;
}
.hero-eyebrow {
  font-size: 0.95rem; font-weight: 600;
  color: var(--accent-warm);
  letter-spacing: 0.04em; text-transform: uppercase;
  margin-bottom: 1.5rem; opacity: 0;
}
.hero-name {
  font-size: clamp(60px, 10vw, 110px);
  font-weight: 800; letter-spacing: -0.04em; line-height: 1;
  color: var(--white); margin-bottom: 1.2rem; opacity: 0;
}
.hero-role {
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 300; letter-spacing: -0.02em; line-height: 1.2;
  color: var(--muted-dark); margin-bottom: 2.5rem; opacity: 0;
}
.hero-role strong { color: var(--white); font-weight: 600; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; opacity: 0; }
.btn-blue {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.85rem 2rem; border-radius: 100px;
  background: var(--accent); color: var(--white);
  font-size: 1rem; font-weight: 500; letter-spacing: -0.01em;
  transition: background 0.3s, transform 0.3s;
}
.btn-blue:hover { background: #0077ed; transform: scale(1.03); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.85rem 2rem; border-radius: 100px;
  background: rgba(255,255,255,0.08); color: var(--white);
  font-size: 1rem; font-weight: 500; letter-spacing: -0.01em;
  border: 1px solid rgba(255,255,255,0.12);
  transition: background 0.3s, transform 0.3s;
}
.btn-ghost:hover { background: rgba(255,255,255,0.14); transform: scale(1.03); }

.hero-avatar {
  width: min(420px, 90vw); height: min(420px, 90vw);
  border-radius: 50%; object-fit: cover; margin: 4rem auto 0;
  border: 1px solid rgba(255,255,255,0.1);
  opacity: 0;
  box-shadow: 0 40px 120px rgba(0,0,0,0.6);
}
.hero-scroll-hint {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--muted-dark); font-size: 0.75rem; letter-spacing: 0.06em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, transparent, var(--muted-dark));
  animation: scrollAnim 2s ease-in-out infinite;
}
@keyframes scrollAnim { 0%,100%{opacity:0.3;transform:scaleY(0.5)} 50%{opacity:1;transform:scaleY(1)} }

/* ==================== STATS BAR ==================== */
.stats-bar {
  background: var(--dark2);
  padding: 4rem 5%;
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.stat-block {
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.06);
}
.stat-block:last-child { border-right: none; }
.stat-number {
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 700; letter-spacing: -0.04em;
  color: var(--white); line-height: 1;
}
.stat-unit { color: var(--accent); }
.stat-desc { font-size: 0.95rem; color: var(--muted-dark); margin-top: 0.5rem; }

/* ==================== SECTION BASE ==================== */
.section-dark { background: var(--black); color: var(--white); }
.section-light { background: var(--gray); color: var(--dark2); }
.section-dark2 { background: var(--dark); color: var(--white); }

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 48px;
}
.section-eyebrow {
  font-size: 0.85rem; font-weight: 600;
  color: var(--accent-warm); letter-spacing: 0.06em;
  text-transform: uppercase; margin-bottom: 1.2rem;
}
.section-eyebrow.blue { color: var(--accent); }
.section-headline {
  font-size: clamp(44px, 6vw, 72px);
  font-weight: 700; letter-spacing: -0.04em; line-height: 1.05;
  margin-bottom: 1.5rem;
}
.section-headline .dim { color: var(--muted-dark); }
.section-sub {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 300; line-height: 1.6;
  color: var(--muted-dark); max-width: 600px;
}
.section-sub.light { color: var(--muted-light); }

/* ==================== ABOUT ==================== */
#about .section-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: center;
}
.about-photo-container { position: relative; }
.about-photo {
  width: 100%; aspect-ratio: 1;
  border-radius: var(--radius-card); object-fit: cover;
  box-shadow: 0 40px 100px rgba(0,0,0,0.15);
}
.about-chip {
  position: absolute;
  background: var(--white); color: var(--dark2);
  border-radius: 50px; padding: 0.7rem 1.2rem;
  font-size: 0.85rem; font-weight: 600;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  display: flex; align-items: center; gap: 0.5rem;
  white-space: nowrap;
}
.about-chip.c1 { bottom: -16px; right: -16px; }
.about-chip.c2 { top: -16px; left: -16px; }
.about-text .section-sub { max-width: 100%; margin-bottom: 2.5rem; color: var(--muted-light); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
.about-card {
  background: var(--white); border-radius: 16px; padding: 1.5rem;
  transition: transform 0.3s var(--ease-apple);
}
.about-card:hover { transform: translateY(-4px); }
.about-card-icon { font-size: 1.6rem; margin-bottom: 0.5rem; }
.about-card-label { font-size: 0.72rem; color: var(--muted-light); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.about-card-value { font-size: 1rem; font-weight: 600; color: var(--dark2); margin-top: 0.2rem; }

/* ==================== SKILLS ==================== */
#skills .section-inner { padding-bottom: 60px; }
.skills-header { margin-bottom: 4rem; }
.skills-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
.skill-card {
  background: var(--dark2); border-radius: var(--radius-card); padding: 2.5rem;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.4s var(--ease-apple), border-color 0.3s;
}
.skill-card:hover { transform: translateY(-6px); border-color: rgba(255,255,255,0.14); }
.skill-card-icon { font-size: 2rem; margin-bottom: 1rem; }
.skill-card-title {
  font-size: 1.4rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 1.8rem;
}
.skill-row { margin-bottom: 1.2rem; }
.skill-row-label { display: flex; justify-content: space-between; font-size: 0.88rem; margin-bottom: 0.5rem; color: var(--muted-dark); }
.skill-row-label span:last-child { color: var(--accent); }
.skill-track { height: 3px; background: rgba(255,255,255,0.08); border-radius: 2px; }
.skill-fill { height: 100%; border-radius: 2px; background: var(--accent); width: 0; transition: width 1.4s var(--ease-apple); }

/* MARQUEE */
.marquee-section { padding: 4rem 0; overflow: hidden; background: var(--dark2); border-top: 1px solid rgba(255,255,255,0.06); border-bottom: 1px solid rgba(255,255,255,0.06); }
.marquee-track { display: flex; width: max-content; animation: marquee 28s linear infinite; }
.marquee-track:hover { animation-play-state: paused; }
.marquee-item {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0 2.5rem; font-size: 1rem; font-weight: 500;
  color: var(--muted-dark); white-space: nowrap;
  transition: color 0.3s;
}
.marquee-item:hover { color: var(--white); }
.marquee-dot { width: 5px; height: 5px; border-radius: 50%; background: rgba(255,255,255,0.2); }
@keyframes marquee { from{transform:translateX(0)} to{transform:translateX(-50%)} }

/* ==================== EXPERIENCE ==================== */
#experience .section-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: start; }
.exp-header { position: sticky; top: 100px; }
.exp-list { display: flex; flex-direction: column; gap: 0; }
.exp-item {
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.exp-item:first-child { border-top: 1px solid rgba(0,0,0,0.08); }
.exp-period { font-size: 0.82rem; color: var(--muted-light); font-weight: 500; margin-bottom: 0.5rem; letter-spacing: 0.02em; }
.exp-title { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; color: var(--dark2); margin-bottom: 0.3rem; }
.exp-org { font-size: 0.9rem; color: var(--accent); font-weight: 500; margin-bottom: 0.8rem; }
.exp-desc { font-size: 0.95rem; color: var(--muted-light); line-height: 1.7; }

/* Certifications */
.exp-certs { grid-column: 2; margin-top: 2rem; }
.exp-certs-title { font-size: 0.85rem; font-weight: 600; color: var(--muted-light); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1rem; }
.cert-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.cert-chip {
  padding: 0.55rem 1.1rem; border-radius: 100px;
  background: var(--white); color: var(--dark2);
  font-size: 0.82rem; font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.05);
}

/* ==================== PROJECTS ==================== */
#projects .section-inner { padding-bottom: 60px; }
.projects-header { margin-bottom: 4rem; }
.project-showcase { display: flex; flex-direction: column; gap: 1.5rem; }
.project-card {
  background: var(--dark2); border-radius: var(--radius-card);
  padding: 3rem; border: 1px solid rgba(255,255,255,0.06);
  display: grid; grid-template-columns: 1fr auto;
  gap: 2rem; align-items: start;
  transition: transform 0.4s var(--ease-apple), border-color 0.3s;
  position: relative; overflow: hidden;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), #5856d6);
  transform: scaleX(0); transform-origin: left; transition: transform 0.5s var(--ease-apple);
}
.project-card:hover::before { transform: scaleX(1); }
.project-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.12); }
.project-card.featured { grid-template-columns: 1fr; }
.project-num {
  font-size: 0.75rem; color: var(--muted-dark); font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 1rem;
}
.project-name {
  font-size: clamp(24px, 3vw, 36px); font-weight: 700;
  letter-spacing: -0.03em; margin-bottom: 0.8rem; line-height: 1.1;
}
.project-desc { font-size: 0.97rem; color: var(--muted-dark); line-height: 1.7; max-width: 560px; margin-bottom: 1.5rem; }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.proj-tag {
  padding: 0.3rem 0.9rem; border-radius: 100px;
  background: rgba(255,255,255,0.06); color: var(--muted-dark);
  font-size: 0.78rem; font-weight: 500;
  border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.3s;
}
.proj-tag:hover { background: rgba(0,113,227,0.15); color: var(--accent); border-color: rgba(0,113,227,0.3); }
.project-icon { font-size: 3.5rem; line-height: 1; }
.project-links-row { display: flex; gap: 1rem; margin-top: 1.5rem; }
.proj-link {
  font-size: 0.88rem; font-weight: 500; color: var(--accent);
  display: flex; align-items: center; gap: 0.3rem;
  transition: opacity 0.3s;
}
.proj-link:hover { opacity: 0.7; }
.proj-link-arrow { font-size: 0.75rem; }

/* Two-col grid for smaller projects */
.project-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1.5rem; }

/* Uniform projects grid — one card per project */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.project-card.grid-card {
  display: flex; flex-direction: column;
  grid-template-columns: none;
  padding: 2.2rem; gap: 0;
}
.project-icon-sm { font-size: 2.2rem; line-height: 1; margin-bottom: 1.4rem; }
.grid-card .project-num { margin-bottom: 0.5rem; }
.grid-card .project-name { font-size: 1.3rem; margin-bottom: 0.7rem; }
.grid-card .project-desc { font-size: 0.9rem; margin-bottom: 1.3rem; flex-grow: 1; }

/* ==================== CONTACT ==================== */
#contact { background: var(--black); }
#contact .section-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start;
}
.contact-big-text {
  font-size: clamp(48px, 6vw, 68px); font-weight: 700;
  letter-spacing: -0.04em; line-height: 1.05;
  margin-bottom: 1.5rem;
}
.contact-sub { font-size: 1.05rem; color: var(--muted-dark); line-height: 1.7; margin-bottom: 3rem; max-width: 440px; }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 1.2rem; }
.contact-list li { display: flex; align-items: center; gap: 1rem; }
.contact-list-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--dark2); border: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.contact-list-info small { font-size: 0.72rem; color: var(--muted-dark); display: block; text-transform: uppercase; letter-spacing: 0.05em; }
.contact-list-info span { font-size: 0.95rem; font-weight: 500; }
.contact-list-info a { color: var(--white); transition: color 0.3s; }
.contact-list-info a:hover { color: var(--accent); }
.socials { display: flex; gap: 0.8rem; margin-top: 2.5rem; }
.social-btn {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--dark2); border: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; transition: all 0.3s; cursor: pointer;
}
.social-btn:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-3px); }

/* FORM */
.contact-form-box {
  background: var(--dark2); border-radius: var(--radius-card); padding: 2.5rem;
  border: 1px solid rgba(255,255,255,0.06);
}
.form-group { margin-bottom: 1.3rem; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 500; color: var(--muted-dark); margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }
.form-input {
  width: 100%; padding: 0.9rem 1.1rem;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px; color: var(--white); font-family: var(--font); font-size: 0.95rem;
  outline: none; resize: none; transition: border-color 0.3s, box-shadow 0.3s;
}
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,113,227,0.15); }
.form-input::placeholder { color: var(--muted-dark); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-submit {
  width: 100%; padding: 1rem;
  background: var(--accent); color: var(--white);
  border: none; border-radius: 12px; font-size: 1rem; font-weight: 600;
  cursor: pointer; font-family: var(--font); letter-spacing: -0.01em;
  transition: background 0.3s, transform 0.3s;
}
.form-submit:hover { background: #0077ed; transform: scale(1.02); }

/* ==================== FOOTER ==================== */
footer {
  background: var(--dark2); padding: 2rem 48px;
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.82rem; color: var(--muted-dark);
}
footer span { color: var(--accent); }

/* ==================== UTILS ==================== */
.reveal { opacity: 0; transform: translateY(50px); }
.reveal.visible { opacity: 1; transform: translateY(0); transition: opacity 0.8s var(--ease-apple), transform 0.8s var(--ease-apple); }
.reveal-scale { opacity: 0; transform: scale(0.94); }
.reveal-scale.visible { opacity: 1; transform: scale(1); transition: opacity 0.9s var(--ease-apple), transform 0.9s var(--ease-apple); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 960px) {
  #about .section-inner, #experience .section-inner, #contact .section-inner { grid-template-columns: 1fr; gap: 3rem; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .project-card { grid-template-columns: 1fr; }
  .project-grid-2 { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  #navbar { padding: 0 24px; }
  .nav-links { display: none; }
  .nav-mobile-btn { display: block; }
  .nav-links.open { display: flex; flex-direction: column; position: fixed; top: 52px; left: 0; right: 0; background: rgba(22,22,23,0.98); backdrop-filter: blur(20px); padding: 2rem 24px; gap: 1.5rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .section-inner { padding: 80px 24px; }
  .exp-header { position: static; }
  .exp-certs { grid-column: 1; }
  .stats-bar { grid-template-columns: 1fr; }
  .stat-block { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.06); padding: 2rem 0; }
  .stat-block:last-child { border-bottom: none; }
  .about-chip.c1 { bottom: 0; right: 0; }
  .about-chip.c2 { top: 0; left: 0; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; padding: 2rem 24px; }
}
@media (max-width: 640px) {
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .form-row { grid-template-columns: 1fr; }
}