:root {
  --bg: #0b0f17;
  --bg-2: #111725;
  --card: #151c2c;
  --line: #243049;
  --text: #e8edf6;
  --muted: #94a0b8;
  --green: #22c55e;
  --green-2: #16a34a;
  --red: #ef4444;
  --gold: #f5b942;
  --radius: 14px;
  --font: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --display: 'Space Grotesk', var(--font);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; margin: 0 0 .5em; }
img { max-width: 100%; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(11, 15, 23, .85); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--display); font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--green), #0ea5e9); display: grid; place-items: center; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: .95rem; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 640px) { .nav-links .hide-sm { display: none; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; border-radius: 10px; border: 1px solid transparent;
  font: 600 1rem var(--font); cursor: pointer; transition: transform .15s, background .15s, opacity .15s;
  color: #04110a; background: var(--green);
}
.btn:hover { background: #2fdc6e; text-decoration: none; transform: translateY(-1px); }
.btn:disabled { opacity: .6; cursor: progress; transform: none; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { background: var(--bg-2); }
.btn-sm { padding: 8px 14px; font-size: .9rem; }
.btn-block { width: 100%; }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 88px 0 72px; border-bottom: 1px solid var(--line); }
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 300px at 80% 10%, rgba(34, 197, 94, .18), transparent 70%),
    radial-gradient(500px 300px at 10% 90%, rgba(14, 165, 233, .12), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } .hero { padding-top: 56px; } }
.eyebrow { display: inline-block; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--green); background: rgba(34, 197, 94, .1); border: 1px solid rgba(34, 197, 94, .25); padding: 5px 12px; border-radius: 999px; margin-bottom: 18px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -.02em; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 560px; margin: 0 0 28px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.chart-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: 0 30px 60px rgba(0, 0, 0, .35); }
.chart-card .row { display: flex; justify-content: space-between; font-size: .85rem; color: var(--muted); margin-bottom: 10px; }
.chart-card .up { color: var(--green); font-weight: 600; }
.chart-card svg { display: block; width: 100%; height: auto; }

/* Sections */
section.block { padding: 80px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
.section-head p { color: var(--muted); margin: 0; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.feature .num { font-family: var(--display); color: var(--green); font-size: .9rem; margin-bottom: 10px; }
.feature h3 { font-size: 1.1rem; }
.feature p { color: var(--muted); margin: 0; font-size: .95rem; }

/* Curriculum */
.modules { display: grid; gap: 12px; }
.module { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.module summary { list-style: none; cursor: pointer; padding: 18px 22px; display: flex; justify-content: space-between; align-items: center; gap: 12px; font-weight: 600; }
.module summary::-webkit-details-marker { display: none; }
.module summary .meta { color: var(--muted); font-weight: 400; font-size: .9rem; white-space: nowrap; }
.module ul { list-style: none; margin: 0; padding: 0 22px 14px; }
.module li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .95rem; }
.lock { opacity: .7; margin-right: 8px; }

/* Instructor */
.instructor { display: grid; grid-template-columns: 96px 1fr; gap: 24px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.avatar { width: 96px; height: 96px; border-radius: 50%; background: linear-gradient(135deg, var(--green), #0ea5e9); display: grid; place-items: center; font: 700 2rem var(--display); color: #04110a; }
.instructor p { color: var(--muted); margin: 0; }
@media (max-width: 560px) { .instructor { grid-template-columns: 1fr; } }

/* Enroll */
.enroll-grid { display: grid; grid-template-columns: 1fr 440px; gap: 48px; align-items: start; }
@media (max-width: 900px) { .enroll-grid { grid-template-columns: 1fr; } }
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checklist li { display: flex; gap: 12px; align-items: flex-start; }
.checklist li::before { content: '✓'; color: var(--green); font-weight: 700; flex: none; }

.price-card { background: var(--card); border: 1px solid rgba(34, 197, 94, .4); border-radius: 18px; padding: 28px; box-shadow: 0 0 0 6px rgba(34, 197, 94, .06), 0 30px 60px rgba(0, 0, 0, .35); }
.price { display: flex; align-items: baseline; gap: 12px; margin-bottom: 4px; }
.price .now { font: 700 2.6rem var(--display); }
.price .was { color: var(--muted); text-decoration: line-through; font-size: 1.1rem; }
.price-note { color: var(--muted); font-size: .9rem; margin: 0 0 22px; }

.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field label { font-size: .88rem; color: var(--muted); }
.field input {
  width: 100%; padding: 13px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font: 1rem var(--font);
}
.field input:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(34, 197, 94, .2); }
.hint { font-size: .85rem; color: var(--muted); margin: 12px 0 0; }
.secure { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: .82rem; color: var(--muted); margin-top: 14px; }

.alert { border-radius: 10px; padding: 12px 14px; font-size: .92rem; margin-bottom: 14px; }
.alert-error { background: rgba(239, 68, 68, .1); border: 1px solid rgba(239, 68, 68, .35); color: #fecaca; }
.alert-info { background: rgba(34, 197, 94, .08); border: 1px solid rgba(34, 197, 94, .3); color: #bbf7d0; }
.alert-warn { background: rgba(245, 185, 66, .1); border: 1px solid rgba(245, 185, 66, .35); color: #fde68a; }
[hidden] { display: none !important; }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 760px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 0; }

/* Footer */
footer { padding: 40px 0 56px; color: var(--muted); font-size: .88rem; }
footer .links { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 16px; }
footer .links a { color: var(--muted); }
.disclaimer { max-width: 820px; font-size: .8rem; opacity: .85; }

/* Auth pages */
.auth { min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 40px 16px; }
.auth-card { width: min(420px, 100%); background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 32px; }
.auth-card h1 { font-size: 1.7rem; }
.auth-card p.sub { color: var(--muted); margin: 0 0 22px; }
.code-input { letter-spacing: .5em; text-align: center; font-size: 1.4rem !important; font-family: var(--display) !important; }

/* Policies */
.prose { max-width: 760px; padding: 56px 0; }
.prose h2 { margin-top: 2em; }
.prose p, .prose li { color: var(--muted); }

/* AK Trades logo */
.brand-logo { display: block; width: 34px; height: 34px; border-radius: 9px; flex: none; }
.card-logo { display: block; width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 18px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; color: var(--text); font: 700 1.05rem var(--display); }
.footer-brand img { width: 28px; height: 28px; border-radius: 7px; }
.watermark { position: absolute; right: 16px; bottom: 14px; width: 30px; height: 30px; border-radius: 8px; opacity: .55; }
.chart-card { position: relative; }