* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); overflow-x: hidden; }
h1,h2,h3 { font-family: var(--font-heading); }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: var(--accent); color: var(--bg); }

/* NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0.9rem 2rem;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo { font-family: var(--font-heading); font-weight: 800; font-size: 1rem; flex-shrink: 0; }
.nav__logo span { color: var(--accent); }
.nav__right { display: flex; align-items: center; gap: 0.8rem; }
.nav__links { display: flex; align-items: center; gap: 1.8rem; margin-right: 0.5rem; }
.nav__links a {
  font-size: 0.68rem; letter-spacing: 1px;
  color: var(--muted); transition: color 0.2s; white-space: nowrap;
}
.nav__links a:hover { color: var(--text); }

.nav__btn {
  background: none; border: 1px solid var(--border); color: var(--muted);
  font-family: var(--font-heading); font-weight: 700; font-size: 0.6rem;
  letter-spacing: 1px; padding: 5px 10px; border-radius: 6px;
  cursor: pointer; transition: all 0.2s; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  height: 28px;
}
.nav__btn:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle { width: 28px; min-width: 28px; padding: 0; font-size: 0.8rem; line-height: 1; position: relative; }
.theme-icon { transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); display: block; }
.theme-icon--sun { opacity: 0; transform: translate(-50%, -50%) rotate(90deg) scale(0); }
.theme-icon--moon { opacity: 1; transform: translate(-50%, -50%) rotate(0deg) scale(1); }
[data-theme="dark"] .theme-icon--sun { opacity: 1; transform: translate(-50%, -50%) rotate(0deg) scale(1); }
[data-theme="dark"] .theme-icon--moon { opacity: 0; transform: translate(-50%, -50%) rotate(-90deg) scale(0); }

.nav__hamburger {
  display: none; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav__hamburger span { display: block; width: 20px; height: 1.5px; background: var(--text); transition: all 0.3s; }
.nav__hamburger.active span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav__hamburger.active span:nth-child(2) { opacity: 0; }
.nav__hamburger.active span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* HERO */
.hero {
  min-height: 100vh; display: flex; align-items: flex-start; justify-content: center;
  text-align: center; padding: 18vh 2rem 6rem; position: relative; overflow: hidden;
}

.hero__grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 20%, transparent 70%);
  transition: transform 0.3s ease-out;
}

.hero__glow {
  position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
  width: 600px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 70%);
  filter: blur(60px); z-index: 0; pointer-events: none;
  transition: left 0.4s ease-out, top 0.4s ease-out;
}

.hero__content { position: relative; z-index: 1; max-width: 780px; }

.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(62, 207, 142, 0.08); border: 1px solid rgba(62, 207, 142, 0.2);
  border-radius: 50px; padding: 6px 16px; font-size: 0.65rem;
  letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent);
  margin-bottom: 2rem;
}

.hero__badge-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(62, 207, 142, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(62, 207, 142, 0); }
}

.hero__title {
  font-size: clamp(2.8rem, 6vw, 4.5rem); font-weight: 800;
  line-height: 1.05; letter-spacing: -2px; margin-bottom: 1.5rem;
  min-height: 3.2em;
}

.hero__title .gradient {
  background: var(--gradient); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}

.hero__rotating-wrapper {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  white-space: nowrap;
}

.hero__rotating-text {
  display: inline-block;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateY(0);
  opacity: 1;
}

.hero__rotating-text--exit {
  transform: translateY(-100%);
  opacity: 0;
}

.hero__rotating-text--enter {
  transform: translateY(100%);
  opacity: 0;
  transition: none;
}

.hero__desc {
  font-size: 0.88rem; color: var(--muted); line-height: 1.9;
  max-width: 620px; margin: 0 auto 3rem; min-height: 1.9em;
}

.hero__cta { display: flex; gap: 1rem; justify-content: center; margin-bottom: 4rem; }

.btn {
  padding: 12px 28px; border-radius: 8px; font-family: var(--font-heading);
  font-weight: 700; font-size: 0.78rem; letter-spacing: 0.5px;
  transition: all 0.25s; border: 1px solid transparent; cursor: pointer;
}
.btn--primary {
  background: var(--accent); color: var(--bg); border-color: var(--accent);
}
.btn--primary:hover { background: #34b87e; box-shadow: 0 0 20px var(--glow); }
.btn--ghost { background: none; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--text); }

.hero__stats { display: flex; gap: 3.5rem; justify-content: center; }
.stat__value {
  font-family: var(--font-heading); font-size: 2rem; font-weight: 800;
  letter-spacing: -1px;
}
.stat__label { font-size: 0.6rem; color: var(--muted); letter-spacing: 1.5px; text-transform: uppercase; margin-top: 4px; }

/* SECTION */
.section {
  padding: 7rem 2rem; max-width: var(--max-width); margin: 0 auto;
}
.section--full { max-width: 100%; }

.section__label {
  font-size: 0.6rem; letter-spacing: 3px;  color: var(--accent); margin-bottom: 0.8rem;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 800;
  letter-spacing: -1.5px; line-height: 1.1; margin-bottom: 1.2rem;
}

.section__desc {
  font-size: 0.85rem; color: var(--muted); line-height: 1.9;
  max-width: 540px; margin-bottom: 3rem;
}

.divider { border: none; height: 1px; background: var(--border); max-width: var(--max-width); margin: 0 auto; }

/* ABOUT TAGS */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2rem; }
.tag {
  font-size: 0.65rem; letter-spacing: 1px; padding: 6px 14px;
  border: 1px solid var(--border); border-radius: 6px; color: var(--muted);
  transition: all 0.25s;
}
.tag:hover { border-color: var(--accent); color: var(--accent); background: rgba(62, 207, 142, 0.05); }

/* FEATURE CARDS */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--border); border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border); margin-top: 3rem;
}

.feature {
  background: var(--bg); padding: 2.5rem 2rem;
  transition: background 0.3s;
}
.feature:hover { background: var(--bg2); }
.feature__icon { font-size: 1.5rem; margin-bottom: 1rem; color: var(--accent); width: 24px; height: 24px; }
.feature__icon svg { width: 24px; height: 24px; }
.feature__name { font-family: var(--font-heading); font-weight: 700; font-size: 0.95rem; margin-bottom: 0.5rem; }
.feature__desc { font-size: 0.72rem; color: var(--muted); line-height: 1.8; }

/* EXPERIENCE */
.exp-list { border-top: 1px solid var(--border); }
.exp-item {
  display: grid; grid-template-columns: 160px 1fr; gap: 2rem;
  padding: 2.5rem 0; border-bottom: 1px solid var(--border);
  transition: opacity 0.3s;
}
.exp-list:hover .exp-item { opacity: 0.3; }
.exp-list:hover .exp-item:hover { opacity: 1; }

.exp-item__date { font-size: 0.7rem; color: var(--muted); padding-top: 0.2rem; }
.exp-item__role { font-family: var(--font-heading); font-weight: 700; font-size: 1.05rem; margin-bottom: 0.2rem; }
.exp-item__company { font-size: 0.78rem; color: var(--accent); margin-bottom: 0.8rem; }
.exp-item__desc { font-size: 0.75rem; color: var(--muted); line-height: 1.9; }
.exp-item__desc li { margin-bottom: 0.3rem; }
.exp-item__desc li::before { content: '— '; color: var(--accent); opacity: 0.5; }

/* PROJECTS */
.projects { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.project-card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 12px;
  padding: 2rem; transition: all 0.3s; position: relative; overflow: hidden;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient); opacity: 0; transition: opacity 0.3s;
}
.project-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.project-card:hover::before { opacity: 1; }

.project-card__num { font-size: 0.6rem; color: var(--accent); letter-spacing: 2px; margin-bottom: 1rem; }
.project-card__title { font-family: var(--font-heading); font-weight: 700; font-size: 1.1rem; margin-bottom: 0.8rem; letter-spacing: -0.3px; }
.project-card__desc { font-size: 0.75rem; color: var(--muted); line-height: 1.9; margin-bottom: 1.5rem; }

.project-card__stats { display: flex; gap: 2rem; margin-bottom: 1rem; }
.pstat__val { font-family: var(--font-heading); font-weight: 700; font-size: 1rem; }
.pstat__label { font-size: 0.55rem; color: var(--muted); letter-spacing: 1px; text-transform: uppercase; }
.project-card__stack { font-size: 0.6rem; color: var(--muted); letter-spacing: 0.5px; }

/* EDUCATION */
.edu-list { border-top: 1px solid var(--border); }
.edu-row {
  display: grid; grid-template-columns: 60px 1fr; gap: 2rem;
  padding: 1.2rem 0; border-bottom: 1px solid var(--border);
}
.edu-row__year { font-size: 0.7rem; color: var(--muted); padding-top: 0.15rem; }
.edu-row__degree { font-family: var(--font-heading); font-weight: 700; font-size: 0.88rem; }
.edu-row__school { font-size: 0.72rem; color: var(--accent); margin-left: 0.5rem; }
.edu-row__school::before { content: '— '; color: var(--muted); }

/* CONTACT */
.contact-section {
  text-align: center; padding: 8rem 2rem; position: relative;
}
.contact-section__glow {
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 500px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, var(--glow2) 0%, transparent 70%);
  filter: blur(80px); pointer-events: none;
}
.contact-section__title {
  font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 800;
  letter-spacing: -2px; margin-bottom: 1rem; position: relative;
}
.contact-section__title .gradient {
  background: var(--gradient); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}
.contact-section__desc { font-size: 0.85rem; color: var(--muted); line-height: 1.9; margin-bottom: 2.5rem; position: relative; }
.contact-section__links { display: flex; gap: 1rem; justify-content: center; position: relative; margin-bottom: 3rem; }

.contact-section__info { display: flex; gap: 4rem; justify-content: center; position: relative; }
.contact-section__info-label { font-size: 0.6rem; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 4px; }
.contact-section__info-value { font-family: var(--font-heading); font-weight: 700; font-size: 0.85rem; }

/* FOOTER */
.footer {
  border-top: 1px solid var(--border); padding: 2rem;
  display: flex; justify-content: space-between; align-items: center;
  max-width: var(--max-width); margin: 0 auto;
  font-size: 0.6rem; color: var(--muted); letter-spacing: 1px;
}
.footer__links { display: flex; gap: 1.2rem; }
.footer__links a { color: var(--muted); transition: color 0.2s; }
.footer__links a:hover { color: var(--accent); }

/* REVEAL */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal--visible { opacity: 1; transform: translateY(0); }
.reveal--d1 { transition-delay: 0.1s; }
.reveal--d2 { transition-delay: 0.2s; }
.reveal--d3 { transition-delay: 0.3s; }

/* ========================================
   LIGHT MODE OVERRIDES
   ======================================== */
[data-theme="light"] .hero__glow {
  opacity: 0.5;
}

[data-theme="light"] .feature {
  background: var(--bg2);
}

[data-theme="light"] .feature:hover {
  background: var(--bg3);
}

[data-theme="light"] .project-card {
  background: var(--bg2);
}

[data-theme="light"] .project-card:hover {
  border-color: var(--border-hover);
}

[data-theme="light"] .btn--primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

[data-theme="light"] .btn--primary:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  color: #fff;
  box-shadow: none;
}

[data-theme="light"] .btn--ghost:hover {
  background: var(--bg2);
}

[data-theme="light"] .contact-section__glow {
  opacity: 0.3;
}

[data-theme="light"] .hero__badge {
  background: rgba(17, 99, 41, 0.06);
  border-color: rgba(17, 99, 41, 0.2);
}

[data-theme="light"] .nav__btn:hover {
  border-color: var(--text);
  color: var(--text);
}