/* ===================================
   SACHIN A — PORTFOLIO STYLESHEET
   Elegant & Professional
   Palette: Deep Navy · Warm Ivory · Soft Gold
   =================================== */

/* --- TOKENS --- */
:root {
  --navy:       #0D1B2A;
  --navy-mid:   #162032;
  --navy-light: #1E2F45;
  --ivory:      #F7F4EF;
  --ivory-dim:  #EDE8E0;
  --gold:       #C9A84C;
  --gold-light: #E2C97E;
  --text-main:  #1A1A2E;
  --text-muted: #6B7280;
  --white:      #FFFFFF;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --radius:    6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow:    0 8px 40px rgba(13, 27, 42, 0.10);
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--ivory);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- CONTAINER --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===================================
   NAV
=================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 3rem;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.nav.scrolled {
  background: rgba(13, 27, 42, 0.96);
  backdrop-filter: blur(12px);
  padding: 0.9rem 3rem;
  box-shadow: 0 2px 24px rgba(13,27,42,0.18);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.05em;
  transition: transform 0.3s ease, text-shadow 0.3s ease;
  display: inline-block;
}
.nav-logo:hover {
  transform: scale(1.15) rotate(-3deg);
  text-shadow: 0 0 18px rgba(201, 168, 76, 0.7);
}
.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1.5px;
  background: var(--gold);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--gold-light); }
.nav-links a:hover::after { width: 100%; }
.nav-links a:hover { color: var(--gold-light); }
.nav-cta {
  border: 1px solid var(--gold) !important;
  padding: 0.4rem 1.1rem !important;
  border-radius: var(--radius);
  color: var(--gold) !important;
  transition: background var(--transition), color var(--transition) !important;
}
.nav-cta:hover {
  background: var(--gold) !important;
  color: var(--navy) !important;
}

/* Hamburger */
.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: var(--ivory);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0; right: -100%;
  width: 70%;
  max-width: 300px;
  height: 100vh;
  background: var(--navy-mid);
  z-index: 99;
  padding: 6rem 2.5rem 2rem;
  transition: right var(--transition);
  box-shadow: -4px 0 40px rgba(0,0,0,0.3);
}
.mobile-menu.open { right: 0; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 2rem; }
.mobile-menu a {
  font-size: 1.1rem;
  color: var(--ivory);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 300;
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--gold-light); }

/* ===================================
   HERO
=================================== */
.hero {
  min-height: 100vh;
  background: var(--navy);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero-bg-text {
  position: absolute;
  right: -3rem;
  bottom: -2rem;
  font-family: var(--font-display);
  font-size: clamp(10rem, 22vw, 22rem);
  font-weight: 600;
  color: rgba(201,168,76,0.04);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  padding-top: 6rem;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.hero-content.revealed { opacity: 1; transform: translateY(0); }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 300;
  color: var(--ivory);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}
.hero-name em {
  font-style: italic;
  color: var(--gold-light);
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  font-weight: 300;
  color: rgba(247,244,239,0.65);
  line-height: 1.5;
  margin-bottom: 3rem;
}
.hero-actions {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--gold);
  color: var(--navy);
  padding: 0.85rem 2.2rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: background var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--gold-light); transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid rgba(247,244,239,0.3);
  color: var(--ivory-dim);
  padding: 0.85rem 2.2rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}
.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold-light);
  transform: translateY(-2px);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 3rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.scroll-line {
  display: block;
  width: 40px;
  height: 1px;
  background: var(--gold);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 1; width: 40px; }
  50%       { opacity: 0.4; width: 20px; }
}
.scroll-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(247,244,239,0.4);
}

/* ===================================
   SECTION SHARED
=================================== */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.2rem;
}
.section-label.light { color: rgba(201,168,76,0.7); }
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-main);
}
.section-heading em {
  font-style: italic;
  color: var(--gold);
}
.section-heading.light { color: var(--ivory); }

/* ===================================
   ABOUT
=================================== */
.about {
  padding: 8rem 0;
  background: var(--ivory);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 5rem;
  margin-top: 3rem;
  align-items: start;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease 0.1s, transform 0.8s ease 0.1s;
}
.about-grid.revealed { opacity: 1; transform: translateY(0); }

.about-image-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.about-avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy-mid), var(--navy-light));
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 8px rgba(201,168,76,0.08), var(--shadow);
}
.avatar-initials {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 600;
  color: var(--gold-light);
  letter-spacing: 0.05em;
}
.about-tag-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}
.tag {
  background: var(--ivory-dim);
  border: 1px solid rgba(13,27,42,0.1);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
}

.about-body {
  color: #4B5563;
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 1.2rem;
}
.about-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ivory-dim);
  align-items: center;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 0.25rem; }
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--navy);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--ivory-dim);
}

/* ===================================
   SKILLS
=================================== */
.skills {
  padding: 8rem 0;
  background: var(--navy);
}
.skills .section-heading { color: var(--ivory); margin-bottom: 0.5rem; }
.skills-intro {
  font-size: 0.88rem;
  color: rgba(247,244,239,0.45);
  margin-bottom: 3.5rem;
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}
.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.skills-grid.revealed { opacity: 1; transform: translateY(0); }

.skill-cat-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}
.skill-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.skill-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.4rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(201,168,76,0.15);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.skill-card:hover {
  background: rgba(201,168,76,0.08);
  border-color: rgba(201,168,76,0.4);
  transform: translateY(-2px);
}
.skill-icon {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
  width: 1.4rem;
  text-align: center;
}
.skill-name {
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--ivory-dim);
  letter-spacing: 0.02em;
}

/* Tooltip */
.skill-tooltip {
  position: absolute;
  background: var(--navy-mid);
  border: 1px solid var(--gold);
  color: var(--ivory-dim);
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 200;
  max-width: 260px;
}
.skill-tooltip.visible { opacity: 1; }

/* ===================================
   EXPERIENCE
=================================== */
.experience {
  padding: 8rem 0;
  background: var(--ivory-dim);
}
.exp-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 3rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.exp-grid.revealed { opacity: 1; transform: translateY(0); }

.exp-card {
  background: var(--white);
  border: 1px solid rgba(13,27,42,0.08);
  border-radius: var(--radius);
  padding: 1.8rem 2rem;
  box-shadow: 0 2px 16px rgba(13,27,42,0.05);
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
}
.exp-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.exp-card--featured {
  border-color: var(--gold);
  background: linear-gradient(135deg, #fff 80%, rgba(201,168,76,0.05));
}
.exp-featured-badge {
  position: absolute;
  top: -12px;
  left: 1.8rem;
  background: var(--gold);
  color: var(--navy);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.8rem;
  border-radius: 20px;
  font-family: var(--font-mono);
}
.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.9rem;
  flex-wrap: wrap;
}
.exp-role {
  display: block;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.2rem;
}
.exp-company {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.exp-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  white-space: nowrap;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(201,168,76,0.3);
  padding: 0.25rem 0.7rem;
  border-radius: 20px;
}
.exp-desc {
  font-size: 0.92rem;
  color: #4B5563;
  line-height: 1.7;
  margin-bottom: 1rem;
}
.exp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.exp-tag {
  background: var(--ivory-dim);
  color: var(--navy);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(13,27,42,0.1);
}

/* ===================================
   EVENTS
=================================== */
.events {
  padding: 8rem 0;
  background: var(--ivory);
}
.events-group {
  margin-top: 3rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.events-group.revealed { opacity: 1; transform: translateY(0); }
.events-group + .events-group { margin-top: 4rem; }

.events-group-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Hackathon card */
.event-card--hackathon {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 2.5rem;
  background: var(--navy);
  border-radius: var(--radius);
  padding: 2.2rem 2.5rem;
  box-shadow: var(--shadow);
  align-items: start;
}
.event-left { border-right: 1px solid rgba(201,168,76,0.2); padding-right: 2rem; }
.event-type-badge {
  display: inline-block;
  background: var(--gold);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  margin-bottom: 1rem;
}
.event-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--ivory);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}
.event-host {
  display: block;
  font-size: 0.78rem;
  color: rgba(247,244,239,0.45);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.event-detail {
  font-size: 0.92rem;
  color: rgba(247,244,239,0.7);
  line-height: 1.75;
  margin-bottom: 1.2rem;
}

/* Workshop cards */
.workshops-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
}
.workshop-card {
  background: var(--white);
  border: 1px solid rgba(13,27,42,0.08);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  box-shadow: 0 2px 12px rgba(13,27,42,0.05);
  transition: box-shadow var(--transition), transform var(--transition);
  opacity: 0;
  transform: translateY(16px);
}
.workshop-card.revealed { opacity: 1; transform: translateY(0); }
.workshop-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.workshop-icon { font-size: 1.6rem; flex-shrink: 0; }
.workshop-event {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.3rem;
}
.workshop-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}
.workshop-host {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}
.workshop-desc {
  font-size: 0.82rem;
  color: #6B7280;
  line-height: 1.6;
}

/* ===================================
   CONTACT
=================================== */
.contact {
  padding: 8rem 0;
  background: linear-gradient(135deg, var(--navy-mid) 0%, var(--navy) 100%);
}
.contact-inner { text-align: center; }
.contact-sub {
  color: rgba(247,244,239,0.55);
  font-size: 1rem;
  margin: 1.2rem auto 3rem;
  max-width: 480px;
  line-height: 1.7;
}
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  justify-content: center;
}
.contact-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border: 1px solid rgba(201,168,76,0.35);
  border-radius: var(--radius);
  color: var(--ivory-dim);
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}
.contact-btn:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
  transform: translateY(-2px);
}
.contact-icon {
  font-size: 1rem;
  font-weight: 600;
}

/* ===================================
   FOOTER
=================================== */
.footer {
  background: #090F18;
  color: rgba(247,244,239,0.3);
  text-align: center;
  padding: 1.5rem 2rem;
  font-size: 0.8rem;
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer strong { color: var(--gold); }

/* ===================================
   RESPONSIVE
=================================== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .about-image-wrap { flex-direction: row; align-items: flex-start; }
}

@media (max-width: 800px) {
  .event-card--hackathon {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .event-left { border-right: none; border-bottom: 1px solid rgba(201,168,76,0.2); padding-right: 0; padding-bottom: 1.5rem; }
}

@media (max-width: 700px) {
  .nav { padding: 1.2rem 1.5rem; }
  .nav.scrolled { padding: 0.8rem 1.5rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .hero-content { padding: 0 1.5rem; padding-top: 7rem; }
  .hero-scroll-hint { left: 1.5rem; }
  .hero-bg-text { font-size: 40vw; }
  .about { padding: 5rem 0; }
  .skills { padding: 5rem 0; }
  .experience { padding: 5rem 0; }
  .events { padding: 5rem 0; }
  .contact { padding: 5rem 0; }
  .about-image-wrap { flex-direction: column; align-items: center; }
  .about-stats { gap: 1.5rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .container { padding: 0 1.25rem; }
}
/* CERTIFICATE MODAL */
.cert-modal {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.cert-modal.open { opacity: 1; pointer-events: all; }
.cert-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 15, 24, 0.85);
  backdrop-filter: blur(6px);
}
.cert-modal-box {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 680px;
  width: 90%;
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
  transform: scale(0.92);
  transition: transform 0.3s ease;
  z-index: 1;
}
.cert-modal.open .cert-modal-box { transform: scale(1); }
.cert-close {
  position: absolute;
  top: 1rem; right: 1rem;
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: color 0.2s;
}
.cert-close:hover { color: var(--navy); }
.cert-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}
.cert-img-wrap img {
  width: 100%;
  border-radius: 4px;
  border: 1px solid var(--ivory-dim);
}
.cert-placeholder {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border: 2px dashed var(--ivory-dim);
  border-radius: 4px;
}

/* ===================================
   ACCESSIBILITY
=================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}