/* =============================================
   MANGESH TIWARI — PORTFOLIO
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --bg: #111;
  --bg-raised: #191919;
  --border: #252525;
  --border-hover: #3a3a3a;
  --fg: #eee;
  --fg-2: #aaa;
  --fg-3: #777;
  --fg-4: #555;
  --accent: #5eead4;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --display: 'Space Grotesk', var(--sans);
  --mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(94, 234, 212, 0.2);
  color: var(--accent);
}

a {
  color: var(--fg-2);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--fg-4); border-radius: 99px; }

/* ── Layout ── */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

.section__container {
  max-width: 960px;
  margin: 0 auto;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.3s, border 0.3s;
}

.nav--scrolled {
  background: rgba(17, 17, 17, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 1.5rem;
}

.nav__logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.nav__logo span { color: var(--accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  color: var(--fg-3);
  font-size: 0.82rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav__link:hover { color: var(--fg); }

.nav__cta {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
}
.nav__cta:hover { color: var(--fg); }

/* Mobile Nav */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  width: 18px;
  height: 1.5px;
  background: var(--fg-2);
  display: block;
}

@media (max-width: 640px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(17, 17, 17, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    opacity: 0;
    transition: 0.25s ease;
  }
  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ── Section Labels ── */
.section__label {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
  display: block;
}

.section__title {
  font-family: var(--display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--fg);
}

.section__subtitle {
  font-size: 0.95rem;
  color: var(--fg-3);
  max-width: 520px;
  line-height: 1.6;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
}

.hero__container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero__badge .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.hero__name {
  font-family: var(--display);
  font-size: clamp(2.5rem, 7vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 1rem;
}

.hero__name .gradient-text {
  color: var(--accent);
  -webkit-text-fill-color: unset;
  background: none;
}

.hero__typing-wrapper {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--fg-3);
  margin-bottom: 2rem;
  min-height: 2rem;
}

.hero__cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 1px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__bio {
  font-size: 0.95rem;
  color: var(--fg-2);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.15s;
  border: none;
  text-decoration: none;
}

.btn--primary {
  background: var(--accent);
  color: #111;
}
.btn--primary:hover {
  background: #7cf5df;
  color: #111;
}

.btn--ghost {
  background: transparent;
  color: var(--fg-2);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  color: var(--fg);
  border-color: var(--border-hover);
}

.hero__scroll-indicator { display: none; }
.hero__scroll-line { display: none; }

/* ── About ── */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2.5rem;
}

.about__text p {
  color: var(--fg-2);
  margin-bottom: 1rem;
  font-size: 0.92rem;
  line-height: 1.7;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.stat-card {
  background: var(--bg-raised);
  padding: 1.25rem;
  text-align: center;
}

.stat-card:hover {
  background: #1e1e1e;
}

.stat-card__number {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
  margin-bottom: 0.3rem;
  font-variant-numeric: tabular-nums;
}

.stat-card__label {
  font-size: 0.68rem;
  color: var(--fg-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ── Education ── */
.education-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
}

.education-card__icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.education-card__degree {
  font-weight: 600;
  font-size: 0.9rem;
}
.education-card__school {
  color: var(--fg-2);
  font-size: 0.82rem;
}
.education-card__meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-4);
  margin-top: 0.15rem;
}

/* ── Projects ── */
.projects__grid {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-raised);
  transition: border-color 0.2s;
}
.project-card:hover {
  border-color: var(--border-hover);
}

.project-card--featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.project-card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}
.project-card--featured .project-card__image {
  aspect-ratio: auto;
  min-height: 320px;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover .project-card__image img {
  transform: scale(1.03);
}

.project-card__image-overlay { display: none; }

.project-card__badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: rgba(17, 17, 17, 0.85);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.project-card__content {
  padding: 1.5rem;
}
.project-card--featured .project-card__content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.project-card__problem {
  font-size: 0.82rem;
  color: var(--fg-3);
  margin-bottom: 0.75rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--accent);
  line-height: 1.5;
  font-style: normal;
}
.project-card__problem strong {
  color: var(--accent);
  font-weight: 600;
}

.project-card__desc {
  color: var(--fg-2);
  font-size: 0.85rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.tech-tag {
  color: var(--fg-3);
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
}

.project-card__links {
  display: flex;
  gap: 0.75rem;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--fg-3);
  font-size: 0.78rem;
  font-weight: 500;
  transition: color 0.15s;
}
.project-card__link:hover { color: var(--accent); }
.project-card__link svg { width: 14px; height: 14px; }

.projects__secondary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

/* ── Skills ── */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.skill-category {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
  transition: border-color 0.2s;
}
.skill-category:hover { border-color: var(--border-hover); }

.skill-category__icon {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.skill-category__title {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--fg);
}

.skill-category__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.skill-pill {
  color: var(--fg-3);
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  transition: color 0.15s, border-color 0.15s;
}
.skill-pill:hover {
  color: var(--fg-2);
  border-color: var(--border-hover);
}

/* ── Experience ── */
.experience__timeline {
  margin-top: 2.5rem;
  position: relative;
  padding-left: 1.5rem;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-item__dot {
  position: absolute;
  left: -1.5rem;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateX(-3px);
}

.timeline-item__card {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
}

.timeline-item__header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.timeline-item__role {
  font-size: 0.95rem;
  font-weight: 700;
}

.timeline-item__company {
  color: var(--fg-2);
  font-size: 0.85rem;
}

.timeline-item__date {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-4);
}

.timeline-item__list { list-style: none; }
.timeline-item__list li {
  position: relative;
  padding-left: 1rem;
  color: var(--fg-2);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  line-height: 1.55;
}
.timeline-item__list li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--fg-4);
}

/* ── Certifications ── */
.certs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.cert-card {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
  transition: border-color 0.2s;
}
.cert-card:hover { border-color: var(--border-hover); }

.cert-card__icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.cert-card__title {
  font-size: 0.85rem;
  font-weight: 600;
}
.cert-card__issuer {
  font-size: 0.75rem;
  color: var(--fg-4);
}
.cert-card__year {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--fg-3);
  margin-top: 0.2rem;
}

/* ── Contact ── */
.contact { text-align: center; }

.contact__title {
  font-family: var(--display);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.contact__subtitle {
  color: var(--fg-3);
  max-width: 420px;
  margin: 0.75rem auto 2rem;
  font-size: 0.92rem;
}

.contact__links {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg-2);
  font-size: 0.82rem;
  font-weight: 500;
  transition: 0.15s;
  background: var(--bg-raised);
}
.contact-link:hover {
  border-color: var(--border-hover);
  color: var(--fg);
}
.contact-link svg { width: 15px; height: 15px; }

/* ── Footer ── */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--fg-4);
  font-size: 0.75rem;
}
.footer span { color: var(--fg-3); }

/* ── Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: 0.05s; }
.reveal--delay-2 { transition-delay: 0.1s; }
.reveal--delay-3 { transition-delay: 0.15s; }
.reveal--delay-4 { transition-delay: 0.2s; }
.reveal--delay-5 { transition-delay: 0.25s; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.text-accent { color: var(--accent); }
.text-secondary { color: var(--fg-2); }
.font-mono { font-family: var(--mono); }

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
  .section { padding: 3rem 1.25rem; }
  .hero { min-height: 90vh; }
  .hero__name { font-size: clamp(2rem, 8vw, 2.8rem); }
  .hero__bio { font-size: 0.88rem; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { text-align: center; justify-content: center; }

  .about__grid { grid-template-columns: 1fr; gap: 2rem; }
  .project-card--featured { grid-template-columns: 1fr; }
  .project-card--featured .project-card__image { min-height: 200px; aspect-ratio: 16/9; }
  .projects__secondary { grid-template-columns: 1fr; }

  .skills__grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .certs__grid { grid-template-columns: 1fr; }

  .experience__timeline { padding-left: 1.25rem; }
  .timeline-item__header { flex-direction: column; gap: 0.15rem; }

  .contact__links { flex-direction: column; align-items: stretch; }
  .contact-link { justify-content: center; }

  .education-card { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .section { padding: 2.5rem 1rem; }
  .hero { min-height: 85vh; }
  .hero__name { font-size: 1.8rem; }
  .skills__grid { grid-template-columns: 1fr; }
  .about__stats { gap: 1px; }
}

@media (hover: none) and (pointer: coarse) {
  .project-card:hover { border-color: var(--border); }
  .project-card:hover .project-card__image img { transform: none; }
  .skill-category:hover { border-color: var(--border); }
}