/* The Trade School — site styles. Blend: academic trust (Coursera blue) + mission pathways (Khan) + builder honesty (terminal block). */
:root {
  --blue: #0056D2; --blue-deep: #003E9A; --blue-soft: #F5F8FF;
  --ink: #1F1F1F; --muted: #6B7280; --body: #374151; --paper: #FFFFFF; --rule: #D9E3F5; --success: #16825D;
  --slate: #0F172A; --slate-2: #1E293B; --slate-text: #94A3B8; --slate-bright: #E2E8F0; --cyan: #7DD3FC;
  --font-sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, Monaco, monospace;
  --max-width: 1100px; --radius: 8px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-sans); font-size: 16px; line-height: 1.6; overflow-x: hidden; }
img, svg { max-width: 100%; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 800px; margin: 0 auto; }
a { color: var(--blue); }
p { margin: 0 0 16px; color: var(--body); }
h2 { font-size: 1.5rem; font-weight: 700; margin: 0 0 24px; letter-spacing: -0.01em; color: var(--ink); }
h3 { color: var(--ink); }
code { font-family: var(--font-mono); font-size: 0.9em; background: var(--blue-soft); padding: 1px 5px; border-radius: 4px; }
pre { font-family: var(--font-mono); font-size: 0.85rem; line-height: 1.5; background: var(--slate); color: var(--slate-bright); padding: 16px 18px; border-radius: var(--radius); overflow-x: auto; margin: 0 0 16px; }
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header */
header.site { border-bottom: 1px solid var(--rule); background: var(--paper); position: sticky; top: 0; z-index: 100; }
header.site .container { display: flex; justify-content: space-between; align-items: center; min-height: 64px; gap: 12px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; min-height: 44px; }
.brand img { width: 34px; height: 34px; display: block; }
.brand b { font-weight: inherit; }
.brand span { color: var(--blue); }
nav.main-nav { display: flex; flex-wrap: wrap; gap: 4px 6px; }
nav.main-nav a { color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 600; padding: 10px 10px; min-height: 44px; display: inline-flex; align-items: center; border-radius: 6px; transition: color .15s, background .15s; }
nav.main-nav a:hover, nav.main-nav a[aria-current="page"] { color: var(--blue); background: var(--blue-soft); }

/* hero */
.hero { padding: 72px 0 56px; background: linear-gradient(180deg, var(--paper) 0%, var(--blue-soft) 100%); border-bottom: 1px solid var(--rule); }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); line-height: 1.15; font-weight: 700; margin: 0 0 16px; letter-spacing: -0.02em; color: var(--ink); }
.hero .lede { font-size: 1.2rem; color: #4B5563; max-width: 640px; margin: 0 0 28px; line-height: 1.5; }
.eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--blue-deep); margin-bottom: 14px; }

/* engine bar (mission style) */
.engine-bar { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 12px; font-family: var(--font-mono); font-size: 0.9rem; color: var(--muted); background: var(--paper); padding: 12px 18px; border-radius: var(--radius); border: 1px solid var(--rule); width: fit-content; max-width: 100%; margin-bottom: 32px; box-shadow: 0 2px 4px rgba(0,0,0,0.02); }
.engine-bar b { color: var(--blue-deep); font-weight: 700; }
.engine-bar .arrow { color: #9DB4E0; }

/* cards */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin: 32px 0; }
.card { background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); padding: 24px; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: 0 10px 24px rgba(0,86,210,0.08); transform: translateY(-2px); }
.card h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 8px; color: var(--blue-deep); }
.card p { margin: 0; font-size: 0.95rem; color: #4B5563; }
.card.accent { border-top: 3px solid var(--blue); }

/* sections */
section { padding: 56px 0; border-bottom: 1px solid var(--rule); }
section.last { border-bottom: none; }

/* buttons — ≥44px tap targets */
.cta-btn, button.cta-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--blue); color: #fff; text-decoration: none; font-weight: 600; font-size: 1rem; padding: 12px 28px; min-height: 48px; border-radius: 999px; transition: background .15s; border: none; cursor: pointer; font-family: inherit; }
.cta-btn:hover { background: var(--blue-deep); }
.cta-btn.secondary { background: transparent; color: var(--blue); border: 1px solid var(--blue); }
.cta-btn.secondary:hover { background: var(--blue-soft); }
.cta-btn.on-dark { background: var(--cyan); color: var(--slate); }
.cta-btn.on-dark:hover { background: #A5E3FF; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* trust block (builder honesty) */
.trust-block { background: var(--slate); color: var(--slate-bright); border-radius: var(--radius); padding: 32px; margin: 32px 0; }
.trust-block h3 { color: #fff; font-size: 1.2rem; margin: 0 0 16px; font-family: var(--font-mono); }
.trust-block p { color: var(--slate-text); font-size: 0.95rem; margin-bottom: 12px; }
.trust-block strong { color: #fff; }
.trust-block code { background: var(--slate-2); padding: 2px 6px; border-radius: 4px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--cyan); }
.trust-block ul { list-style: none; padding: 0; margin: 20px 0 0; }
.trust-block li { padding: 8px 0; display: flex; align-items: flex-start; gap: 10px; color: #CBD5E1; font-size: 0.92rem; }
.trust-block li::before { content: "→"; color: #34D399; font-weight: bold; flex: none; }
.trust-block pre { background: #020617; border: 1px solid var(--slate-2); margin: 18px 0 0; }
.trust-block .k { color: var(--cyan); } .trust-block .v { color: #fff; } .trust-block .c { color: #64748B; }

/* pricing table */
table.pricing { width: 100%; border-collapse: collapse; font-size: 0.95rem; margin: 16px 0 24px; }
table.pricing th, table.pricing td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.pricing th { font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.table-wrap { overflow-x: auto; }

/* note */
.note { font-size: 0.9rem; color: var(--muted); border-left: 3px solid var(--rule); padding-left: 14px; margin: 24px 0; }

/* forms — ≥16px inputs (no iOS zoom), ≥44px targets */
form .row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-bottom: 14px; }
label { display: block; font-size: 0.9rem; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
input, select, textarea { width: 100%; font: inherit; font-size: 16px; padding: 11px 12px; min-height: 44px; border: 1px solid #C7D2E5; border-radius: 6px; background: #fff; color: var(--ink); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.result { background: var(--blue-soft); border: 1px solid var(--rule); border-radius: var(--radius); padding: 18px 20px; margin-top: 18px; }
.result .big { font-size: 2.2rem; font-weight: 700; color: var(--blue-deep); line-height: 1; }
.result .tier { font-weight: 700; color: var(--success); }
.bars { display: grid; gap: 8px; margin-top: 14px; }
.bar { display: grid; grid-template-columns: 170px 1fr 48px; gap: 10px; align-items: center; font-size: 0.85rem; }
.bar i { display: block; height: 8px; background: #DCE6FA; border-radius: 4px; overflow: hidden; }
.bar i b { display: block; height: 100%; background: var(--blue); }
.reasons li { font-size: 0.9rem; color: var(--body); margin-bottom: 6px; }
.comp-row { display: grid; grid-template-columns: 1.4fr 1fr 0.7fr 1.2fr 0.9fr 0.8fr auto; gap: 8px; align-items: end; margin-bottom: 10px; }
.comp-row button { min-height: 44px; min-width: 44px; border: 1px solid #C7D2E5; background: #fff; border-radius: 6px; cursor: pointer; font-size: 18px; }

/* prose pages */
.prose { max-width: 760px; }
.prose h2 { margin-top: 40px; }
.prose h3 { margin: 28px 0 8px; font-size: 1.1rem; }
.prose ul, .prose ol { color: var(--body); padding-left: 22px; }
.prose li { margin-bottom: 6px; }
blockquote { margin: 24px 0; padding: 12px 18px; border-left: 3px solid var(--blue); background: var(--blue-soft); color: var(--ink); font-size: 1.05rem; }

/* footer */
footer { padding: 40px 0; background: var(--blue-soft); border-top: 1px solid var(--rule); font-size: 0.85rem; color: var(--muted); }
footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer nav { display: flex; flex-wrap: wrap; gap: 2px 4px; }
footer a { color: var(--blue); text-decoration: none; padding: 10px 8px; min-height: 44px; display: inline-flex; align-items: center; }
footer .fine { font-size: 0.8rem; margin-top: 8px; display: block; color: #9CA3AF; max-width: 520px; }

@media (max-width: 768px) {
  .hero { padding: 40px 0 36px; }
  section { padding: 40px 0; }
  .comp-row { grid-template-columns: 1fr 1fr; }
  .bar { grid-template-columns: 120px 1fr 44px; }
}
@media (max-width: 420px) {
  .container { padding: 0 16px; }
  nav.main-nav a { padding: 10px 8px; font-size: 0.85rem; }
}