/* ═══════════════════════════════════════════
   SHREEDIP KAINI — Quantum Portfolio
   Theme: Dark Quantum Lattice
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Source+Serif+4:ital,wght@0,400;0,600;1,400&display=swap');

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

body {
  background: radial-gradient(ellipse at 20% 0%, #0a1628 0%, #050c14 50%, #020608 100%);
  color: #e0f7fa;
  font-family: 'Source Serif 4', Georgia, serif;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background: rgba(0, 220, 208, 0.3);
  color: #fff;
}

a {
  color: #00dcd0;
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: #5fffef;
}

/* ─── TYPOGRAPHY ──────────────────────── */
.font-display {
  font-family: 'Outfit', sans-serif;
}

.font-body {
  font-family: 'Source Serif 4', Georgia, serif;
}

/* ─── ANIMATIONS ──────────────────────── */
@keyframes pulse-line {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-stagger-0 { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes hero-stagger-1 { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes hero-stagger-2 { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes hero-stagger-3 { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes hero-stagger-4 { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

.hero-s0 { animation: hero-stagger-0 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both; }
.hero-s1 { animation: hero-stagger-1 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both; }
.hero-s2 { animation: hero-stagger-2 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both; }
.hero-s3 { animation: hero-stagger-3 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.55s both; }
.hero-s4 { animation: hero-stagger-4 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.7s both; }

/* ─── QUANTUM CANVAS ─────────────────── */
.quantum-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ─── NAV ─────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: all 0.3s;
}

.nav--scrolled {
  background: rgba(5, 12, 20, 0.92);
  backdrop-filter: blur(16px);
  border-bottom-color: rgba(0, 220, 208, 0.1);
}

.nav__logo {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: #00dcd0;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav__logo span {
  color: #e0f7fa;
}

.nav__links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav__link {
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #5a8a8f;
  text-decoration: none;
  text-transform: capitalize;
  padding: 6px 12px;
  border-radius: 6px;
  background: transparent;
  transition: all 0.2s;
}
.nav__link:hover {
  color: #00dcd0;
  background: rgba(0, 220, 208, 0.05);
}
.nav__link--active {
  color: #00dcd0;
  background: rgba(0, 220, 208, 0.08);
}

/* ─── SECTIONS ────────────────────────── */
.section {
  position: relative;
  z-index: 1;
  padding: 100px 24px;
  max-width: 1100px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.section--visible {
  opacity: 1;
  transform: translateY(0);
}

.section__title {
  margin-bottom: 48px;
}
.section__title h2 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  color: #e0f7fa;
  letter-spacing: -0.02em;
}
.section__title h2 .dot {
  color: #00dcd0;
}
.section__title .subtitle {
  font-family: 'Source Serif 4', serif;
  font-size: 16px;
  color: #5a8a8f;
  margin-top: 8px;
  font-style: italic;
}
.section__title .line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #00dcd0, transparent);
  margin-top: 16px;
  border-radius: 2px;
}

/* ─── HERO ────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 120px 24px 80px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero__tag {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #00dcd0;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero__tag-line {
  width: 24px;
  height: 2px;
  background: #00dcd0;
  display: inline-block;
}

.hero__name {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 800;
  color: #e0f7fa;
  margin-top: 16px;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.hero__name .accent {
  color: #00dcd0;
}

.hero__desc {
  font-family: 'Source Serif 4', serif;
  font-size: clamp(16px, 2.5vw, 20px);
  color: #7ab0b5;
  max-width: 600px;
  line-height: 1.6;
  margin-top: 24px;
}
.hero__desc .sub {
  color: #5a8a8f;
  font-size: 0.85em;
}

.hero__stats {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.stat-card {
  padding: 12px 20px;
  border: 1px solid rgba(0, 220, 208, 0.15);
  border-radius: 10px;
  background: rgba(0, 220, 208, 0.03);
}
.stat-card__val {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: #00dcd0;
}
.stat-card__label {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #5a8a8f;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.hero__scroll-text {
  font-family: 'Outfit', sans-serif;
  font-size: 10px;
  color: #3a6a6f;
  text-transform: uppercase;
  letter-spacing: 0.15em;
}
.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, #00dcd0, transparent);
  animation: pulse-line 2s infinite;
}

/* ─── ABOUT ───────────────────────────── */
.about__text {
  font-size: 17px;
  color: #a0cdd0;
  line-height: 1.75;
}
.about__text--dim {
  color: #7ab0b5;
  margin-top: 20px;
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.info-card {
  padding: 20px;
  border-radius: 12px;
  background: rgba(0, 220, 208, 0.03);
  border: 1px solid rgba(0, 220, 208, 0.08);
}
.info-card__label {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #5a8a8f;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.info-card__value {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #e0f7fa;
}

/* ─── RESEARCH CARDS ──────────────────── */
.research-grid {
  display: grid;
  gap: 20px;
}

.research-card {
  padding: 28px;
  border-radius: 14px;
  border: 1px solid rgba(0, 220, 208, 0.08);
  background: rgba(5, 12, 20, 0.6);
  transition: all 0.3s;
}
.research-card:hover {
  border-color: rgba(0, 220, 208, 0.3);
  background: rgba(0, 220, 208, 0.04);
  transform: translateY(-2px);
}

.research-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.research-card__period {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #5a8a8f;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.status-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 20px;
}
.status-badge--active   { color: #00ff88; border: 1px solid rgba(0,255,136,0.2); background: rgba(0,255,136,0.05); }
.status-badge--completed { color: #00dcd0; border: 1px solid rgba(0,220,208,0.2); background: rgba(0,220,208,0.05); }
.status-badge--published { color: #f5a623; border: 1px solid rgba(245,166,35,0.2); background: rgba(245,166,35,0.05); }

.research-card__title {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #e0f7fa;
  margin-bottom: 6px;
  line-height: 1.3;
}

.research-card__org {
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  color: #00dcd0;
  font-weight: 500;
  margin-bottom: 12px;
}

.research-card__desc {
  font-family: 'Source Serif 4', serif;
  font-size: 14px;
  color: #7ab0b5;
  line-height: 1.65;
  margin-bottom: 16px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #00dcd0;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(0, 220, 208, 0.08);
  border: 1px solid rgba(0, 220, 208, 0.12);
}

/* ─── PUBLICATIONS ────────────────────── */
.pub-grid {
  display: grid;
  gap: 24px;
}

.pub-card {
  padding: 24px;
  border-radius: 14px;
  border: 1px solid rgba(0, 220, 208, 0.08);
  background: rgba(5, 12, 20, 0.6);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.pub-card__year {
  font-family: 'Outfit', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: rgba(0, 220, 208, 0.15);
  line-height: 1;
  min-width: 70px;
  flex-shrink: 0;
}

.pub-card__title {
  font-family: 'Outfit', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #e0f7fa;
  margin-bottom: 6px;
  line-height: 1.4;
}

.pub-card__authors {
  font-family: 'Source Serif 4', serif;
  font-size: 14px;
  color: #7ab0b5;
  margin-bottom: 4px;
}

.pub-card__journal {
  font-family: 'Outfit', sans-serif;
  font-size: 12px;
  color: #5a8a8f;
}

/* ─── SKILLS ──────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.skill-cat__name {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #00dcd0;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-cat__items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-chip {
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  color: #c0e8eb;
  padding: 6px 14px;
  border-radius: 8px;
  background: rgba(0, 220, 208, 0.06);
  border: 1px solid rgba(0, 220, 208, 0.1);
  transition: all 0.2s;
}
.skill-chip:hover {
  background: rgba(0, 220, 208, 0.12);
  border-color: rgba(0, 220, 208, 0.25);
  color: #e0f7fa;
}

/* ─── AWARDS TIMELINE ─────────────────── */
.awards-grid {
  display: grid;
  gap: 24px;
}

.timeline-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.timeline-item__icon {
  min-width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 220, 208, 0.08);
  border: 1px solid rgba(0, 220, 208, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.timeline-item__year {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #5a8a8f;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.timeline-item__title {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #e0f7fa;
  margin: 4px 0;
}

.timeline-item__detail {
  font-family: 'Source Serif 4', serif;
  font-size: 14px;
  color: #7ab0b5;
  line-height: 1.5;
}

/* ─── EDUCATION ───────────────────────── */
.edu-grid {
  display: grid;
  gap: 20px;
}

.edu-card {
  padding: 24px;
  border-radius: 14px;
  border: 1px solid rgba(0, 220, 208, 0.08);
  background: rgba(5, 12, 20, 0.6);
  transition: all 0.3s;
}
.edu-card:hover {
  border-color: rgba(0, 220, 208, 0.2);
}

.edu-card__degree {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #e0f7fa;
  margin-bottom: 4px;
}

.edu-card__school {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  color: #00dcd0;
  font-weight: 500;
  margin-bottom: 8px;
}

.edu-card__meta {
  font-family: 'Outfit', sans-serif;
  font-size: 12px;
  color: #5a8a8f;
  margin-bottom: 12px;
}

.edu-card__thesis {
  font-family: 'Source Serif 4', serif;
  font-size: 14px;
  color: #7ab0b5;
  line-height: 1.5;
  font-style: italic;
}

/* ─── CONTACT ─────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  border-radius: 12px;
  background: rgba(0, 220, 208, 0.03);
  border: 1px solid rgba(0, 220, 208, 0.08);
  text-decoration: none;
  transition: all 0.2s;
}
.contact-card:hover {
  border-color: rgba(0, 220, 208, 0.2);
  background: rgba(0, 220, 208, 0.06);
}

.contact-card__icon {
  font-size: 24px;
}

.contact-card__label {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  color: #5a8a8f;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact-card__value {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #e0f7fa;
}

/* ─── FOOTER ──────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid rgba(0, 220, 208, 0.06);
}

.footer__text {
  font-family: 'Outfit', sans-serif;
  font-size: 12px;
  color: #3a5a5f;
}

/* ─── RESPONSIVE ──────────────────────── */
@media (max-width: 640px) {
  .nav__links {
    gap: 4px;
  }
  .nav__link {
    font-size: 11px;
    padding: 5px 8px;
  }
  .pub-card {
    flex-direction: column;
    gap: 12px;
  }
  .section {
    padding: 60px 16px;
  }
  .hero {
    padding: 100px 16px 60px;
  }
}