/* ─── Reset & Base ─────────────────────────────────── */

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

:root {
  --bg: #0a0a0b;
  --bg-elevated: #111113;
  --bg-card: #161618;
  --bg-card-hover: #1c1c1f;
  --border: #222225;
  --border-light: #2a2a2e;
  --text: #e8e8ec;
  --text-secondary: #9898a0;
  --text-muted: #5c5c64;
  --accent-1: #6e56cf;
  --accent-2: #30a46c;
  --accent-3: #e5484d;
  --accent-4: #3b82f6;
  --accent-glow: rgba(110, 86, 207, 0.15);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

/* ─── Navigation ───────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1.5rem, 5vw, 3rem);
  transition: background 0.4s, backdrop-filter 0.4s, box-shadow 0.4s;
}

.nav--scrolled {
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: 0 1px 0 var(--border);
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.3s;
}

.nav__logo:hover {
  color: var(--accent-1);
}

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color 0.3s;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-1);
  transition: width 0.3s var(--ease-out);
}

.nav__link:hover {
  color: var(--text);
}

.nav__link:hover::after {
  width: 100%;
}

/* ─── Hero ─────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg canvas {
  width: 100%;
  height: 100%;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
}

.hero__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-1);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s var(--ease-out) 0.4s forwards;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s var(--ease-out) 0.6s forwards;
}

.hero__cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  border: 1px solid var(--border-light);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: all 0.3s var(--ease-out);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s var(--ease-out) 0.8s forwards;
}

.hero__cta:hover {
  background: var(--accent-1);
  border-color: var(--accent-1);
  box-shadow: 0 0 30px var(--accent-glow);
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  opacity: 0;
  animation: fadeIn 1s var(--ease-out) 1.2s forwards;
}

.hero__scroll span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.3); }
}

/* ─── About ────────────────────────────────────────── */

.about {
  padding: 8rem 0;
  position: relative;
}

.about__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  margin-bottom: 5rem;
}

.about__sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Profile Photo */

.about__photo {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}

.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about__photo-fallback {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
}

.about__photo--placeholder .about__photo-fallback {
  display: flex;
}

.about__photo--placeholder img {
  display: none;
}

.about__photo-fallback span {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 600;
  color: var(--accent-1);
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--border-light);
  background: var(--bg);
}

.about__photo-fallback p {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

.about__photo-fallback code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-1);
  background: var(--bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.about__heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 2rem;
}

.about__body p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.75;
}

.about__personal {
  padding: 2rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  align-self: start;
}

.about__personal-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.tag:hover {
  border-color: var(--accent-1);
  color: var(--text);
}

.about__personal-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat {
  text-align: center;
}

.stat__number {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text);
  display: inline;
}

.stat__plus {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-1);
}

.stat__label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Skills */

.about__skills-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.about__skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.skill-card {
  padding: 1.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.4s var(--ease-out);
}

.skill-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.skill-card__icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent-1);
}

.skill-card h4 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.skill-card p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── Projects ─────────────────────────────────────── */

.projects {
  padding: 6rem 0 8rem;
}

.projects__heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s var(--ease-out);
}

.project-card:hover {
  border-color: var(--border-light);
  transform: translateY(-6px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.project-card__preview {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg);
}

.project-card__iframe-wrap {
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.project-card__iframe-wrap iframe {
  width: 200%;
  height: 200%;
  border: none;
  transform: scale(0.5);
  transform-origin: top left;
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 11, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.project-card:hover .project-card__overlay {
  opacity: 1;
}

.project-card__visit {
  padding: 0.7rem 1.5rem;
  background: var(--accent-1);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: white;
  transform: translateY(10px);
  transition: transform 0.3s var(--ease-out);
}

.project-card:hover .project-card__visit {
  transform: translateY(0);
}

.project-card__info {
  padding: 1.5rem;
}

.project-card__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.project-card__tags {
  display: flex;
  gap: 0.5rem;
}

.project-card__tags span {
  padding: 0.3rem 0.7rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* ─── Contact ──────────────────────────────────────── */

.contact {
  padding: 6rem 0 8rem;
  border-top: 1px solid var(--border);
}

.contact__heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.contact__sub {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 3rem;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s var(--ease-out);
}

.contact__link:first-child {
  border-top: 1px solid var(--border);
}

.contact__link:hover {
  padding-left: 1rem;
}

.contact__link:hover .contact__link-value {
  color: var(--accent-1);
}

.contact__link-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact__link-value {
  font-size: 1rem;
  color: var(--text-secondary);
  transition: color 0.3s;
}

/* ─── Footer ───────────────────────────────────────── */

.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__back a {
  color: var(--text-muted);
  transition: color 0.3s;
}

.footer__back a:hover {
  color: var(--text);
}

/* ─── Scroll Animations ───────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal-stagger--visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger--visible > *:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger--visible > *:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger--visible > *:nth-child(4) { transition-delay: 0.24s; }

.reveal-stagger--visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ───────────────────────────────────── */

@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about__sidebar {
    flex-direction: row;
  }

  .about__photo {
    aspect-ratio: 1;
    max-width: 200px;
    flex-shrink: 0;
  }

  .about__skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .nav__links {
    gap: 1.25rem;
  }

  .about__skills-grid {
    grid-template-columns: 1fr;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }

  .contact__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}