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

:root {
  --bg:          #0d0d14;
  --bg-2:        #12121e;
  --bg-card:     #1a1a2e;
  --border:      rgba(255,255,255,.07);
  --text:        #e2e2f0;
  --text-muted:  #7c7c9c;
  --accent:      #6c63ff;
  --accent-2:    #3ecfcf;
  --accent-glow: rgba(108,99,255,.25);
  --green:       #22c55e;
  --radius:      12px;
  --radius-lg:   20px;
  --shadow:      0 4px 32px rgba(0,0,0,.4);
  --transition:  .3s cubic-bezier(.4,0,.2,1);
  --nav-h:       70px;
  --container:   1100px;
  --font:        'Inter', system-ui, sans-serif;
  --mono:        'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── TYPOGRAPHY ────────────────────────────────────────────── */
h1,h2,h3,h4 { line-height: 1.15; font-weight: 700; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { cursor: pointer; font-family: var(--font); }

/* ── SCROLLBAR ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ── CONTAINER ─────────────────────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ── BUTTONS ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px var(--accent-glow);
}
.btn--outline {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn--outline:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}
.btn--full { width: 100%; justify-content: center; }

/* ── NAV ───────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(13,13,20,.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}
.nav__logo {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -.02em;
}
.nav__logo-bracket { color: var(--accent); }

.nav__links {
  display: flex;
  list-style: none;
  gap: 8px;
}
.nav__link {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover, .nav__link.active {
  color: var(--text);
  background: var(--bg-card);
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── SECTIONS ──────────────────────────────────────────────── */
.section {
  padding: 110px 0;
  position: relative;
}
.section:nth-child(even) { background: var(--bg-2); }

.section__header {
  text-align: center;
  margin-bottom: 64px;
}
.section__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.section__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  background: linear-gradient(135deg, var(--text) 40%, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── REVEAL ANIMATIONS ─────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── HERO ──────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(108,99,255,.18) 0%, transparent 70%),
              radial-gradient(ellipse at 80% 80%, rgba(62,207,207,.1) 0%, transparent 60%),
              var(--bg);
}

#particleCanvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: calc(var(--nav-h) + 40px) 24px 60px;
  animation: fadeUp .9s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__greeting {
  font-family: var(--mono);
  color: var(--accent-2);
  font-size: .95rem;
  margin-bottom: 12px;
  letter-spacing: .04em;
}
.hero__name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  background: linear-gradient(135deg, #fff 30%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: -.03em;
}
.hero__role-wrapper {
  display: inline-flex;
  align-items: center;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--accent);
  font-family: var(--mono);
  margin-bottom: 24px;
  min-height: 1.8em;
}
.hero__cursor {
  animation: blink .7s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 580px;
  margin: 0 auto 36px;
}
.hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero__socials {
  display: flex;
  gap: 16px;
  justify-content: center;
}
.social-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}
.social-icon svg { width: 18px; height: 18px; }
.social-icon:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: .75rem;
  color: var(--text-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  animation: fadeUp 1s .5s ease both;
}
.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 1.5s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(.6); opacity: .5; }
}

/* ── ABOUT ─────────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: center;
}

.about__image-col { position: relative; }
.about__avatar-frame {
  position: relative;
  width: 280px;
  margin: 0 auto;
}
.about__avatar {
  width: 280px;
  height: 280px;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  overflow: hidden;
  animation: morphBlob 8s ease-in-out infinite;
}
.about__avatar svg { width: 180px; height: 180px; }
@keyframes morphBlob {
  0%,100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
  25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
  50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
  75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
}
.about__badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: .78rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}
.about__badge-num { font-size: 1.4rem; font-weight: 700; color: var(--accent); line-height: 1; }
.about__badge--1 { top: 20px; right: -20px; }
.about__badge--2 { bottom: 20px; left: -20px; }

.about__subtitle {
  font-size: 1.3rem;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 600;
}
.about__body {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: .97rem;
}
.about__body strong { color: var(--text); font-weight: 600; }
.about__body em { color: var(--accent-2); font-style: normal; }

.about__info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 28px 0;
}
.about__info-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.about__info-label { font-size: .72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; }
.about__info-value { font-size: .9rem; font-weight: 600; color: var(--text); }

/* ── PROJECTS ──────────────────────────────────────────────── */
.projects__filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 8px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: .88rem;
  font-weight: 500;
  transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity var(--transition);
  background: radial-gradient(circle at 50% 0%, rgba(108,99,255,.08), transparent 70%);
}
.project-card:hover { transform: translateY(-6px); box-shadow: 0 20px 48px rgba(0,0,0,.3); border-color: rgba(108,99,255,.3); }
.project-card:hover::before { opacity: 1; }
.project-card.hidden { display: none; }

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 24px 0;
}
.project-card__icon {
  width: 44px;
  height: 44px;
  background: color-mix(in srgb, var(--card-color) 15%, transparent);
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--card-color);
}
.project-card__icon svg { width: 22px; height: 22px; }
.project-card__links {
  display: flex;
  gap: 10px;
}
.project-card__links a {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-muted);
  transition: var(--transition);
}
.project-card__links a svg { width: 15px; height: 15px; }
.project-card__links a:hover { color: var(--accent); background: var(--accent-glow); }

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  padding: 18px 24px 8px;
}
.project-card__desc {
  font-size: .88rem;
  color: var(--text-muted);
  padding: 0 24px;
  flex: 1;
}
.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 24px 24px;
}
.project-card__tags span {
  font-size: .72rem;
  font-family: var(--mono);
  color: var(--accent-2);
  background: rgba(62,207,207,.08);
  border: 1px solid rgba(62,207,207,.2);
  padding: 3px 10px;
  border-radius: 6px;
}

/* ── SKILLS ────────────────────────────────────────────────── */
.skills__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.skills__col-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.skill-bar { margin-bottom: 20px; }
.skill-bar__info {
  display: flex;
  justify-content: space-between;
  font-size: .88rem;
  margin-bottom: 8px;
  font-weight: 500;
}
.skill-bar__pct { color: var(--accent); font-family: var(--mono); }
.skill-bar__track {
  height: 6px;
  background: var(--bg-card);
  border-radius: 3px;
  overflow: hidden;
}
.skill-bar__fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  transition: width 1.2s cubic-bezier(.4,0,.2,1);
}
.skill-bar__fill.animated { width: var(--level); }

.skills__category { margin-bottom: 28px; }
.skills__cat-label {
  display: block;
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-family: var(--mono);
}
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-tags span {
  font-size: .82rem;
  padding: 6px 14px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition);
  cursor: default;
}
.tech-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

/* ── CONTACT ───────────────────────────────────────────────── */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}
.contact__intro {
  color: var(--text-muted);
  font-size: .97rem;
  margin-bottom: 32px;
  line-height: 1.7;
}
.contact__details { display: flex; flex-direction: column; gap: 20px; margin-bottom: 32px; }
.contact__detail {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.contact__detail-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--accent);
}
.contact__detail-icon svg { width: 18px; height: 18px; }
.contact__detail-label { display: block; font-size: .72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 2px; }
.contact__detail-value { font-size: .92rem; font-weight: 500; }
.contact__detail-value--green { color: var(--green); }

.contact__socials { display: flex; gap: 12px; flex-wrap: wrap; }
.contact__social-btn {
  padding: 8px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}
.contact__social-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* ── FORM ──────────────────────────────────────────────────── */
.contact__form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .82rem; font-weight: 500; color: var(--text-muted); letter-spacing: .04em; }
.form-group input,
.form-group textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: .92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input.error,
.form-group textarea.error { border-color: #f43f5e; }
.form-error { font-size: .78rem; color: #f43f5e; min-height: 16px; }

.form-success {
  background: rgba(34,197,94,.1);
  border: 1px solid rgba(34,197,94,.3);
  color: var(--green);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: .9rem;
  text-align: center;
}

.btn__loader { display: inline-flex; align-items: center; }
.btn__loader svg { width: 18px; height: 18px; }
.spinning { animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── FOOTER ────────────────────────────────────────────────── */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  font-size: .9rem;
  color: var(--text-muted);
}
.footer strong { color: var(--text); }
.footer__sub { font-size: .78rem; margin-top: 4px; font-family: var(--mono); color: var(--accent); }

/* ── SCROLL-TOP BUTTON ─────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent);
  border: none;
  color: #fff;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 99;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.scroll-top svg { width: 20px; height: 20px; }
.scroll-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px var(--accent-glow); }

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav { padding: 0 20px; }
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(13,13,20,.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform var(--transition);
    z-index: 99;
  }
  .nav__links.open { transform: translateY(0); }
  .nav__hamburger { display: flex; }

  .about__grid { grid-template-columns: 1fr; gap: 40px; }
  .about__avatar-frame { width: 240px; }
  .about__avatar { width: 240px; height: 240px; }
  .about__badge--1 { right: 0; }
  .about__badge--2 { left: 0; }

  .skills__layout { grid-template-columns: 1fr; gap: 40px; }

  .contact__grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 600px) {
  .section { padding: 80px 0; }
  .projects__grid { grid-template-columns: 1fr; }
  .about__info-grid { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; align-items: center; }
  .contact__form { padding: 24px; }
  .scroll-top { bottom: 20px; right: 20px; }
}