/* Tech Knowledge Express — shared styles */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0b1220;
  --panel: #121b2e;
  --panel-2: #16213a;
  --line: #24304a;
  --text: #e9eef7;
  --muted: #93a1b8;
  --accent: #4f7cff;
  --accent-2: #22d3ee;
  --accent-soft: rgba(79, 124, 255, .12);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---- Nav ---- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -.02em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 22px; flex-wrap: wrap; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-login { margin-left: auto; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 9px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---- Hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: 48px;
  align-items: center;
  padding: 72px 0 56px;
}
.hero-art { min-width: 0; }
.hero-art svg { width: 100%; height: auto; display: block; }
.kicker {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
h1 {
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 18px;
}
.lede { color: var(--muted); font-size: 17px; margin-bottom: 14px; }
.hero-cta { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---- Sections ---- */
.section { padding: 40px 0 56px; }
.section h2 {
  font-size: 27px;
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.section .sub { color: var(--muted); margin-bottom: 28px; max-width: 640px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  color: var(--text);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color .15s ease, transform .15s ease;
}
a.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { font-size: 19px; }
.card p { color: var(--muted); font-size: 15px; flex: 1; }
.card .go { color: var(--accent); font-weight: 600; font-size: 14px; }
.card-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
}
.card-icon svg { width: 24px; height: 24px; stroke: var(--accent); }

/* Feature list (two-column checkmarks) */
.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 28px;
  margin: 22px 0;
}
.feature {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
}
.feature svg { width: 20px; height: 20px; stroke: var(--accent-2); flex-shrink: 0; margin-top: 3px; }
.feature strong { display: block; font-size: 15.5px; }
.feature span { color: var(--muted); font-size: 14px; }

/* Process steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 24px 0; }
.step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.step .num {
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .1em;
  margin-bottom: 6px;
}
.step strong { display: block; margin-bottom: 4px; font-size: 15.5px; }
.step span { color: var(--muted); font-size: 14px; }

/* Trust banner */
.trust {
  display: flex;
  gap: 16px;
  align-items: center;
  background: linear-gradient(90deg, var(--accent-soft), transparent);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 8px 0 8px;
}
.trust svg { width: 30px; height: 30px; stroke: var(--accent); flex-shrink: 0; }
.trust p { color: var(--text); font-size: 15.5px; }
.trust p span { color: var(--muted); }

/* CTA band */
.cta-band {
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 42px 28px;
  margin: 20px 0 60px;
}
.cta-band h2 { font-size: 25px; margin-bottom: 8px; }
.cta-band p { color: var(--muted); margin-bottom: 20px; }

/* ---- Forms (contact / login) ---- */
.form-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 30px;
  max-width: 560px;
}
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  font-size: 15px;
  padding: 11px 13px;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  outline: none;
  border-color: var(--accent);
}
.form-msg { color: var(--accent-2); font-size: 14.5px; margin-top: 14px; min-height: 20px; }

/* Login page */
.login-shell {
  min-height: calc(100vh - 180px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px;
  width: 100%;
  max-width: 400px;
}
.login-card h1 { font-size: 24px; margin-bottom: 6px; }
.login-card .sub { color: var(--muted); font-size: 14.5px; margin-bottom: 22px; }
.login-card .btn { width: 100%; margin-top: 6px; }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  padding: 26px 0 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); padding-top: 44px; }
  .hero-art { order: -1; max-width: 420px; }
  .cards { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .site-nav { gap: 14px; }
  .nav-links { gap: 14px; }
  .steps { grid-template-columns: 1fr }
}

/* ---- Additions: page heroes, art, nav polish ---- */
.site-nav .nav-links a.active { color: var(--text); position: relative; }
.site-nav .nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -20px; height: 2px; background: var(--accent);
}
.hero-art {
  background: radial-gradient(ellipse at 50% 40%, rgba(79,124,255,.16), transparent 70%);
  border-radius: 24px;
}
.page-hero { padding: 56px 0 24px; }
.page-hero .hero { padding: 0 0 24px; }
.art-band {
  margin: 8px 0 32px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  overflow: hidden;
}
.art-band svg { width: 100%; height: auto; display: block; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; }
.pill {
  background: var(--accent-soft);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13.5px;
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.contact-side h3 { font-size: 17px; margin-bottom: 6px; }
.contact-side p { color: var(--muted); font-size: 15px; margin-bottom: 18px; }
.contact-side a { color: var(--accent); text-decoration: none; }
.checklist { list-style: none; margin: 10px 0 0; }
.checklist li { display: flex; gap: 10px; color: var(--muted); font-size: 15px; margin-bottom: 8px; }
.checklist li::before { content: "✓"; color: var(--accent-2); font-weight: 700; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 6px 10px; font-size: 18px; cursor: pointer; }
@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .site-nav { flex-wrap: wrap; gap: 10px; }
  .brand { font-size: 17px; }
  .nav-login { margin-left: auto; order: 1; padding: 6px 12px; font-size: 14px; }
  .nav-toggle { display: block; margin-left: 0; order: 2; }
  .nav-links { display: none; width: 100%; flex-direction: column; gap: 10px; padding-top: 12px; order: 3; }
  .nav-links.open { display: flex; }
  .site-nav .nav-links a.active::after { display: none; }
}