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

:root {
  --c-bg:        #0a0e1a;
  --c-bg2:       #0f1525;
  --c-bg3:       #111827;
  --c-muted:     #1a2236;
  --c-border:    #1e2d47;
  --c-accent:    #3b82f6;
  --c-accent2:   #6366f1;
  --c-teal:      #14b8a6;
  --c-text:      #e2e8f0;
  --c-text-mid:  #94a3b8;
  --c-text-dim:  #64748b;
  --c-white:     #ffffff;

  --ff-body: 'Inter', system-ui, sans-serif;
  --ff-head: 'Space Grotesk', system-ui, sans-serif;

  --radius:  12px;
  --radius-lg: 20px;

  --shadow: 0 4px 24px rgba(0,0,0,.45);
  --glow:   0 0 40px rgba(59,130,246,.18);
}

html { scroll-behavior: smooth; }

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--ff-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: min(1100px, 92vw);
  margin-inline: auto;
}

/* ── Typography ───────────────────────────────────────── */
h1,h2,h3,h4 { font-family: var(--ff-head); line-height: 1.2; }

h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }

.eyebrow {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: .5rem;
}
.eyebrow.light { color: var(--c-teal); }

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.6rem;
  border-radius: 8px;
  font-family: var(--ff-body);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-accent);
  color: #fff;
}
.btn-primary:hover { background: #2563eb; transform: translateY(-1px); box-shadow: var(--glow); }

.btn-outline {
  border-color: var(--c-border);
  color: var(--c-text);
  background: transparent;
}
.btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent); }

.btn-outline-light {
  border-color: rgba(255,255,255,.25);
  color: var(--c-text);
  background: transparent;
}
.btn-outline-light:hover { border-color: var(--c-teal); color: var(--c-teal); }

.btn-sm { padding: .5rem 1.1rem; font-size: .85rem; }
.btn-full { width: 100%; }

/* ── Nav ──────────────────────────────────────────────── */
.nav-wrap {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,14,26,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
  transition: background .3s;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-family: var(--ff-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-white);
}
.logo span { color: var(--c-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-text-mid);
  transition: color .2s;
}
.nav-links a:hover { color: var(--c-white); }

.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(--c-text);
  border-radius: 2px;
  transition: all .25s;
}

/* ── Sections ─────────────────────────────────────────── */
.section { padding: 100px 0; }
.section-dark { background: var(--c-bg2); }
.section-muted { background: var(--c-muted); }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}
.section-sub {
  color: var(--c-text-mid);
  margin-top: 1rem;
  font-size: 1.05rem;
}

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(59,130,246,.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 60%, rgba(99,102,241,.08) 0%, transparent 70%),
    var(--c-bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text { max-width: 560px; }

h1 span { color: var(--c-accent); }

.hero-sub {
  margin: 1.5rem 0 2rem;
  color: var(--c-text-mid);
  font-size: 1.1rem;
  max-width: 480px;
}

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Hero visual */
.hero-visual {
  position: relative;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .35;
}
.orb-1 {
  width: 260px; height: 260px;
  background: var(--c-accent);
  top: 0; right: 0;
}
.orb-2 {
  width: 180px; height: 180px;
  background: var(--c-accent2);
  bottom: 0; left: 40px;
}

.circuit-card {
  position: relative;
  z-index: 2;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  min-width: 280px;
}
.circuit-row {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: .5rem 0;
}
.node {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--c-border);
  border: 2px solid var(--c-border);
  transition: all .3s;
}
.node.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  box-shadow: 0 0 12px var(--c-accent);
}
.line {
  flex: 1;
  height: 2px;
  background: var(--c-border);
}
.line.long { flex: 2; }
.circuit-label {
  text-align: center;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin: .8rem 0;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--c-text-dim);
  font-size: 1.4rem;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}

/* ── Training Topics ──────────────────────────────────── */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}
.topic-card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color .2s, transform .2s;
}
.topic-card:hover { border-color: var(--c-accent); transform: translateY(-3px); }
.topic-icon { font-size: 1.8rem; margin-bottom: .8rem; }
.topic-card h3 { margin-bottom: .5rem; }
.topic-card p { color: var(--c-text-mid); font-size: .92rem; }

/* ── Pricing ──────────────────────────────────────────── */
.pricing-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  align-items: start;
}
.price-card {
  position: relative;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}
.price-card--featured {
  border-color: var(--c-accent);
  background: rgba(59,130,246,.08);
  box-shadow: var(--glow);
  transform: scale(1.02);
}
.badge {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .25rem .7rem;
  border-radius: 999px;
  margin-bottom: .75rem;
}
.badge-alt { background: var(--c-teal); }
.price-label { color: var(--c-text-mid); font-size: .85rem; margin-bottom: .25rem; }
.price-amount {
  font-family: var(--ff-head);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--c-white);
  margin-bottom: .25rem;
}
.price-amount span { font-size: 1rem; font-weight: 400; color: var(--c-text-mid); }
.price-note { font-size: .82rem; color: var(--c-text-dim); margin-bottom: 1rem; }
.price-card ul { margin: 1rem 0 1.5rem; display: flex; flex-direction: column; gap: .5rem; }
.price-card li {
  font-size: .9rem;
  color: var(--c-text-mid);
  padding-left: 1.2rem;
  position: relative;
}
.price-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--c-teal);
  font-weight: 700;
}

/* ── Dev Section ──────────────────────────────────────── */
.dev-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.dev-feature {
  padding: 1.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: border-color .2s, transform .2s;
}
.dev-feature:hover { border-color: var(--c-accent2); transform: translateY(-3px); }
.dev-icon { font-size: 2rem; margin-bottom: .75rem; }
.dev-feature h3 { margin-bottom: .5rem; }
.dev-feature p { color: var(--c-text-mid); font-size: .92rem; }

.spotlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  background: linear-gradient(135deg, rgba(59,130,246,.08), rgba(99,102,241,.06));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
}
.spotlight-text h3 { font-size: 1.8rem; margin: .5rem 0 1rem; display: flex; align-items: baseline; gap: .75rem; flex-wrap: wrap; }
.spotlight-domain {
  font-size: .85rem;
  font-weight: 500;
  color: var(--c-teal);
  letter-spacing: .03em;
}
.spotlight-text p { color: var(--c-text-mid); margin-bottom: 1.5rem; }

.code-block {
  background: #0d1117;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  font-family: 'Courier New', monospace;
  font-size: .85rem;
  line-height: 2;
}
.code-line { display: block; color: var(--c-text-mid); }
.code-line .kw { color: #7c93f0; }
.code-line.indent { padding-left: 1.5rem; }

/* ── About ────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-grid--single {
  grid-template-columns: 1fr;
  max-width: 760px;
  margin-inline: auto;
}

.about-bio h2 { margin: .25rem 0 .5rem; }
.bio-title {
  color: var(--c-accent);
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}
.about-bio p {
  color: var(--c-text-mid);
  margin-bottom: 1rem;
  font-size: .97rem;
}
.about-bio em { color: var(--c-text); font-style: italic; }

.bio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.5rem;
}
.bio-tags span {
  background: rgba(59,130,246,.12);
  border: 1px solid rgba(59,130,246,.3);
  color: var(--c-accent);
  font-size: .8rem;
  font-weight: 600;
  padding: .3rem .85rem;
  border-radius: 999px;
  letter-spacing: .03em;
}

/* ── Contact ──────────────────────────────────────────── */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  margin-bottom: 1rem;
}
label {
  font-size: .85rem;
  font-weight: 500;
  color: var(--c-text-mid);
}
input, select, textarea {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: .7rem 1rem;
  color: var(--c-text);
  font-family: var(--ff-body);
  font-size: .95rem;
  transition: border-color .2s;
  outline: none;
  width: 100%;
}
input::placeholder, textarea::placeholder { color: var(--c-text-dim); }
input:focus, select:focus, textarea:focus { border-color: var(--c-accent); }
select option { background: var(--c-bg3); }
textarea { resize: vertical; }

.form-note {
  text-align: center;
  margin-top: 1rem;
  font-size: .9rem;
  color: var(--c-teal);
  min-height: 1.4em;
}

/* ── Footer ───────────────────────────────────────────── */
.footer {
  background: #070b14;
  border-top: 1px solid var(--c-border);
  padding: 2rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy { font-size: .82rem; color: var(--c-text-dim); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: .85rem; color: var(--c-text-dim); transition: color .2s; }
.footer-links a:hover { color: var(--c-text); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .spotlight { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav-links { display: none; flex-direction: column; }
  .nav-links.open {
    display: flex;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--c-bg2);
    border-bottom: 1px solid var(--c-border);
    padding: 1.5rem 2rem;
    gap: 1.25rem;
  }
  .hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .price-card--featured { transform: none; }
  .footer-inner { flex-direction: column; text-align: center; }
  .section { padding: 70px 0; }
}

/* ── Scroll fade-in ───────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s ease, transform .5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── Animated node pulse ──────────────────────────────── */
@keyframes pulse {
  0%,100% { box-shadow: 0 0 6px var(--c-accent); }
  50%      { box-shadow: 0 0 18px var(--c-accent); }
}
.node.active { animation: pulse 2s ease-in-out infinite; }