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

:root {
  --bg-dark: #0a0f0a;
  --bg-card: #0d150d;
  --bg-card-hover: #111d11;
  --green-primary: #39ff14;
  --green-dim: #1a7a0a;
  --green-glow: rgba(57, 255, 20, 0.15);
  --green-glow-strong: rgba(57, 255, 20, 0.3);
  --text-primary: #e0f5e0;
  --text-secondary: #7a9a7a;
  --text-muted: #4a6a4a;
  --border: rgba(57, 255, 20, 0.12);
  --border-hover: rgba(57, 255, 20, 0.3);
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: 'SN Pro', system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-dark);
  overflow-x: hidden;
}

#particles {
  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;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 15, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__logo {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--green-primary);
  letter-spacing: -0.03em;
  text-shadow: 0 0 20px var(--green-glow-strong);
}

.nav__links {
  display: flex;
  gap: 1.5rem;
}

.nav__link {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s, text-shadow 0.3s;
  letter-spacing: 0.02em;
}

.nav__link:hover {
  color: var(--green-primary);
  text-shadow: 0 0 12px var(--green-glow);
}

/* ======================== HERO ======================== */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero__glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--green-glow-strong) 0%, transparent 70%);
  filter: blur(80px);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

.hero__content {
  position: relative;
  z-index: 2;
}

.hero__avatar {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 2rem;
}

.hero__avatar-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--green-primary);
  opacity: 0.5;
  animation: ring-rotate 8s linear infinite;
  border-top-color: transparent;
  border-left-color: transparent;
}

@keyframes ring-rotate {
  to { transform: rotate(360deg); }
}

.hero__avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, #0d150d, #1a2e1a);
  border: 2px solid var(--border-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--green-primary);
  text-shadow: 0 0 30px var(--green-glow-strong);
}

.hero__name {
  font-family: 'SN Pro', system-ui, sans-serif;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.hero__name-accent {
  background: linear-gradient(135deg, var(--green-primary), #00cc00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__tagline {
  margin-top: 1rem;
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.hero__scroll-hint {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', Menlo, monospace;
}

.hero__scroll-arrow {
  animation: bounce 2s ease-in-out infinite;
  font-size: 1.2rem;
  color: var(--green-dim);
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ======================== SECTIONS ======================== */
.section {
  position: relative;
  z-index: 1;
  padding: 6rem 2rem;
}

.section--alt {
  background: rgba(13, 21, 13, 0.5);
}

.section__inner {
  max-width: 900px;
  margin: 0 auto;
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section__number {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.85rem;
  color: var(--green-primary);
  opacity: 0.6;
}

.section__title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* ======================== ABOUT CARDS ======================== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 30px var(--green-glow);
  transform: translateY(-3px);
}

.card__icon {
  font-size: 1.8rem;
  margin-bottom: 0.7rem;
}

.card__label {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.card__value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.about-quote {
  border-left: 3px solid var(--green-dim);
  padding-left: 1.5rem;
  margin-top: 2rem;
}

.about-quote blockquote {
  font-style: italic;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ======================== SUBJECTS ======================== */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.subject-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  overflow: hidden;
  transition: border-color 0.4s, transform 0.4s;
}

.subject-card:hover {
  border-color: var(--green-primary);
  transform: translateY(-5px);
}

.subject-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
}

.subject-card__icon svg {
  width: 100%;
  height: 100%;
}

.subject-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--green-primary);
}

.subject-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.subject-card__glow {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(ellipse, var(--green-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}

.subject-card:hover .subject-card__glow {
  opacity: 1;
}

/* ======================== PYTHON CARD ======================== */
.python-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.python-card__left {
  padding: 1rem 0;
}

.python-card__logo {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
}

.python-card__logo svg {
  width: 100%;
  height: 100%;
}

.python-card__title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--green-primary);
  margin-bottom: 0.75rem;
}

.python-card__desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.code-block {
  background: #080c08;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.code-block__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(13, 21, 13, 0.8);
  border-bottom: 1px solid var(--border);
}

.code-block__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-block__dot--red { background: #ff5f57; }
.code-block__dot--yellow { background: #febc2e; }
.code-block__dot--green { background: #28c840; }

.code-block__filename {
  margin-left: 0.5rem;
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.code-block__code {
  padding: 1.25rem;
  overflow-x: auto;
}

.code-block__code code {
  font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.7;
  color: #b0c8b0;
}

.code-block__code .kw { color: #ff79c6; }
.code-block__code .fn { color: #50fa7b; }
.code-block__code .str { color: #f1fa8c; }
.code-block__code .num { color: #bd93f9; }
.code-block__code .hl { color: var(--green-primary); }

/* ======================== FOOTER ======================== */
.footer {
  position: relative;
  z-index: 1;
  padding: 3rem 2rem;
  text-align: center;
}

.footer__inner {
  max-width: 900px;
  margin: 0 auto;
}

.footer__line {
  width: 60px;
  height: 2px;
  background: var(--green-dim);
  margin: 0 auto 1.5rem;
  border-radius: 1px;
}

.footer__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}

.footer__sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', Menlo, monospace;
}

/* ======================== RESPONSIVE ======================== */
@media (max-width: 700px) {
  .hero__name { font-size: 2rem; }
  .section { padding: 4rem 1.25rem; }
  .section__title { font-size: 1.5rem; }
  .python-card { grid-template-columns: 1fr; }
  .nav { padding: 0.75rem 1rem; }
  .nav__links { gap: 0.8rem; }
  .nav__link { font-size: 0.7rem; }
}

@media (max-width: 480px) {
  .hero__name { font-size: 1.6rem; }
  .about-grid { grid-template-columns: 1fr; }
  .subjects-grid { grid-template-columns: 1fr; }
}

/* ======================== SCROLL ANIMATIONS ======================== */
.section {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

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