/* ============================================================
   Affordable Education Institute — brand stylesheet
   System: "Open Field, bolder"
   Display: Bricolage Grotesque · Body: Hanken Grotesk
   ============================================================ */

:root {
  --moss:   #3F6149;
  --moss-d: #325039;
  --sprout: #AED45A;
  --sprout-d:#9bc344;
  --honey:  #D6A24C;
  --cream:  #F5F1E8;
  --cream-2:#EDE7D9;
  --bark:   #26241D;
  --leaf:   #86A98C;
  --muted:  #5E5A4E;
  --line:   rgba(38,36,29,0.12);
  --white:  #FFFFFF;

  --disp: "Bricolage Grotesque", sans-serif;
  --body: "Hanken Grotesk", sans-serif;

  --maxw: 1180px;
  --gut: 40px;
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--bark);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

/* ---------- Type ---------- */
h1, h2, h3, h4 { font-family: var(--disp); font-weight: 800; letter-spacing: -0.02em; line-height: 1.0; margin: 0; }
h1 { font-size: clamp(42px, 6vw, 72px); letter-spacing: -0.035em; }
h2 { font-size: clamp(32px, 4vw, 50px); letter-spacing: -0.03em; }
h3 { font-size: clamp(22px, 2.4vw, 28px); letter-spacing: -0.02em; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; }

.eyebrow {
  font-family: var(--body); font-weight: 700; font-size: 13px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--moss);
  display: inline-flex; align-items: center; gap: 9px; margin: 0;
}
.eyebrow--light { color: var(--sprout); }
.lead { font-size: clamp(18px, 2vw, 21px); line-height: 1.55; color: var(--muted); }

/* marker highlight — the signature move */
.hl { background: var(--sprout); color: var(--bark); padding: 0.02em 0.28em; border-radius: 5px;
      box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.hl-honey { background: var(--honey); color: #3d2c08; }
.hl-moss  { background: var(--moss); color: var(--cream); }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gut); }
.section { padding: clamp(64px, 9vw, 120px) 0; }
.section--tight { padding: clamp(48px, 6vw, 80px) 0; }
.section--moss { background: var(--moss); color: var(--cream); }
.section--bark { background: var(--bark); color: var(--cream); }
.section--white { background: var(--white); }
.section--moss .lead, .section--bark .lead { color: rgba(245,241,232,0.78); }
.section--moss .eyebrow, .section--bark .eyebrow { color: var(--sprout); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.stack-sm > * + * { margin-top: 14px; }
.stack > * + * { margin-top: 22px; }

/* ---------- Logo mark (CSS growth rings via layered gradients) ---------- */
.mark { position: relative; width: 40px; height: 40px; display: inline-block; flex: 0 0 auto; border-radius: 50%;
  background:
    radial-gradient(circle closest-side, var(--sprout) 0 30%, transparent 31%),
    radial-gradient(circle closest-side, transparent 0 49%, rgba(63,97,73,0.62) 50% 66%, transparent 67%),
    radial-gradient(circle closest-side, transparent 0 83%, rgba(63,97,73,0.30) 84% 100%, transparent 100%); }
.mark--sm { width: 30px; height: 30px; }
.mark--lg { width: 56px; height: 56px; }
.mark--light {
  background:
    radial-gradient(circle closest-side, var(--cream) 0 30%, transparent 31%),
    radial-gradient(circle closest-side, transparent 0 49%, rgba(174,212,90,0.92) 50% 66%, transparent 67%),
    radial-gradient(circle closest-side, transparent 0 83%, rgba(174,212,90,0.45) 84% 100%, transparent 100%); }

.logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.logo .logo-name { display: block; font-family: var(--disp); font-weight: 800; font-size: 19px; letter-spacing: -0.03em; line-height: 0.95; color: var(--bark); }
.logo .logo-sub  { display: block; font-family: var(--body); font-weight: 700; font-size: 9.5px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--moss); margin-top: 3px; }
.logo--light .logo-name { color: var(--cream); }
.logo--light .logo-sub  { color: var(--sprout); }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--body); font-weight: 700; font-size: 15px; line-height: 1;
  border-radius: 100px; padding: 15px 26px; cursor: pointer; border: 1.5px solid transparent;
  text-decoration: none; transition: transform .15s ease, box-shadow .15s ease, background .15s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-moss   { background: var(--moss); color: #fff; }
.btn-moss:hover { box-shadow: 0 8px 22px rgba(63,97,73,0.28); }
.btn-sprout { background: var(--sprout); color: var(--bark); }
.btn-sprout:hover { box-shadow: 0 8px 22px rgba(174,212,90,0.4); }
.btn-outline { background: transparent; color: var(--bark); border-color: rgba(38,36,29,0.25); }
.btn-outline:hover { border-color: var(--bark); }
.btn-outline--light { color: var(--cream); border-color: rgba(245,241,232,0.4); }
.btn-outline--light:hover { border-color: var(--cream); }
.btn-sm { padding: 11px 20px; font-size: 14px; }
.btn-lg { padding: 18px 32px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(245,241,232,0.86);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { font-family: var(--body); font-weight: 600; font-size: 14px; color: var(--bark);
  opacity: 0.72; text-decoration: none; transition: opacity .15s; }
.nav-links a:hover { opacity: 1; }
.nav-links a.active { opacity: 1; color: var(--moss); }
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--bark); margin: 4px 0; transition: .2s; }

/* ---------- Footer ---------- */
.footer { background: var(--bark); color: var(--cream); padding: 64px 0 36px; }
.footer a { color: rgba(245,241,232,0.7); text-decoration: none; font-size: 14.5px; transition: color .15s; }
.footer a:hover { color: var(--sprout); }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 32px; }
.footer-col h4 { font-family: var(--body); font-size: 12px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--sprout); margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px;
  border-top: 1px solid rgba(245,241,232,0.14); margin-top: 48px; padding-top: 24px;
  font-size: 13px; color: rgba(245,241,232,0.55); flex-wrap: wrap; }

/* ---------- Cards & bits ---------- */
.card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.card--cream { background: var(--cream-2); border-color: transparent; }
.card-num { font-family: var(--disp); font-weight: 800; font-size: 42px; letter-spacing: -0.04em; color: var(--moss); line-height: 1; }
.tag-pill { display: inline-flex; align-items: center; gap: 8px; background: var(--cream-2);
  color: var(--bark); font-size: 13px; font-weight: 700; padding: 8px 14px; border-radius: 100px; }
.section--moss .tag-pill, .section--bark .tag-pill { background: rgba(245,241,232,0.12); color: var(--cream); }

/* forms */
.form-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.form-grid { display: grid; gap: 14px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-field label { display: block; font-size: 14px; font-weight: 700; color: var(--bark); margin-bottom: 7px; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  color: var(--bark);
  font: inherit;
  padding: 13px 14px;
}
.form-field textarea { min-height: 132px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--moss);
  box-shadow: 0 0 0 3px rgba(63,97,73,0.08);
}
.form-help { font-size: 13px; color: var(--muted); }
.form-status { min-height: 24px; font-size: 14px; font-weight: 600; }
.form-status--pending { color: var(--moss); }
.form-status--success { color: var(--moss); }
.form-status--error { color: #8a3b2e; }
.form-card [type="submit"]:disabled { opacity: 0.72; cursor: wait; }

/* striped image placeholder */
.ph { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  background: repeating-linear-gradient(135deg, #fff, #fff 10px, rgba(63,97,73,0.07) 10px, rgba(63,97,73,0.07) 20px);
  display: flex; align-items: center; justify-content: center; min-height: 180px; }
.ph span { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 11px; letter-spacing: 0.05em;
  text-transform: uppercase; color: rgba(63,97,73,0.6); background: rgba(255,255,255,0.85); padding: 5px 10px; border-radius: 4px; }
.ph--moss { background: repeating-linear-gradient(135deg, var(--moss), var(--moss) 10px, var(--moss-d) 10px, var(--moss-d) 20px); border-color: transparent; }
.ph--moss span { color: var(--cream); background: rgba(38,36,29,0.25); }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Public Knowledge Library ---------- */
.library-card { display: flex; flex-direction: column; min-height: 100%; }
.library-card__meta { font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--moss); }
.library-card__footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: auto; padding-top: 20px; font-size: 14px; color: var(--muted); }
.library-card__footer a { color: var(--moss); font-weight: 700; text-decoration: none; }
.library-card__footer a:hover { text-decoration: underline; }
.library-stat { display: grid; gap: 10px; align-content: start; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,0.72); }
.library-stat strong { font-family: var(--disp); font-size: clamp(28px, 4vw, 44px); letter-spacing: -0.04em; line-height: 1; color: var(--moss); }
.library-category-list { display: grid; gap: 16px; }
.library-category-link { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); text-decoration: none; }
.library-category-link strong { font-family: var(--disp); font-size: 24px; letter-spacing: -0.03em; }
.library-category-link span { color: var(--muted); font-weight: 700; }
.kl-article-shell { max-width: 900px; }
.kl-breadcrumb { font-size: 13px; font-weight: 700; letter-spacing: 0.04em; color: var(--muted); }
.kl-breadcrumb a { color: var(--moss); text-decoration: none; }
.kl-hero-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.kl-section-shell { max-width: 860px; }
.kl-section-shell--wide { max-width: 1040px; }
.kl-block { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.kl-block--cream { background: var(--cream-2); border-color: transparent; }
.kl-diagram { border-radius: 22px; background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(237,231,217,0.8)); border: 1px solid var(--line); padding: 28px; }
.kl-scale { display: grid; gap: 12px; }
.kl-scale__bar { display: grid; grid-template-columns: repeat(5, 1fr); overflow: hidden; border-radius: 999px; min-height: 26px; }
.kl-scale__bar span:nth-child(1) { background: #c6c8a6; }
.kl-scale__bar span:nth-child(2) { background: #a6be82; }
.kl-scale__bar span:nth-child(3) { background: #86a98c; }
.kl-scale__bar span:nth-child(4) { background: #5c8159; }
.kl-scale__bar span:nth-child(5) { background: #3f6149; }
.kl-scale__labels, .kl-legend { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; font-size: 13px; color: var(--muted); }
.kl-factor-list, .kl-stack-list, .kl-steps, .kl-rule-rows, .kl-shift-grid, .kl-parts-grid, .kl-tip-grid, .kl-mini-grid, .kl-quad-grid { display: grid; gap: 16px; }
.kl-factor { display: grid; grid-template-columns: 84px 1fr; gap: 14px 18px; align-items: start; padding-top: 18px; border-top: 1px solid var(--line); }
.kl-factor:first-child { border-top: none; padding-top: 0; }
.kl-factor__pct { font-family: var(--disp); font-size: 34px; font-weight: 800; line-height: 1; color: var(--moss); }
.kl-factor__title { font-family: var(--disp); font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.kl-factor__bar { height: 12px; border-radius: 999px; overflow: hidden; background: var(--cream-2); margin-top: 8px; }
.kl-factor__bar span { display: block; height: 100%; border-radius: 999px; background: var(--moss); }
.kl-step { display: grid; grid-template-columns: 88px 1fr; gap: 18px; align-items: center; padding: 20px 22px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.kl-step__months { display: grid; place-items: center; aspect-ratio: 1; border-radius: 50%; background: var(--moss); color: var(--cream); font-family: var(--disp); font-size: 30px; font-weight: 800; }
.kl-check-grid, .kl-parts-grid, .kl-quad-grid { display: grid; gap: 20px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kl-check-card, .kl-cause-card, .kl-way-card, .kl-tip-card, .kl-part-card, .kl-shift { padding: 24px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.kl-check-card h3 { font-size: 24px; }
.kl-check-card ul, .kl-pill-list, .kl-simple-list { margin: 0; padding-left: 18px; display: grid; gap: 10px; }
.kl-check-card li, .kl-pill-list li, .kl-simple-list li { color: var(--muted); }
.kl-choice { display: grid; gap: 22px; }
.kl-choice__top { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.kl-choice__node { flex: 1 1 220px; padding: 20px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.kl-choice__arrow { width: 72px; height: 2px; background: var(--moss); position: relative; }
.kl-choice__arrow::after { content: ""; position: absolute; right: 0; top: -4px; width: 10px; height: 10px; border-top: 2px solid var(--moss); border-right: 2px solid var(--moss); transform: rotate(45deg); }
.kl-shift__meta { display: flex; justify-content: space-between; gap: 14px; font-weight: 700; color: var(--moss); }
.kl-sd-chart { position: relative; min-height: 320px; border-radius: 18px; background: linear-gradient(180deg, rgba(63,97,73,0.02), rgba(63,97,73,0.08)); overflow: hidden; }
.kl-sd-chart::before, .kl-sd-chart::after { content: ""; position: absolute; background: rgba(38,36,29,0.35); }
.kl-sd-chart::before { left: 42px; right: 24px; bottom: 42px; height: 1px; }
.kl-sd-chart::after { top: 24px; bottom: 42px; left: 42px; width: 1px; }
.kl-sd-line { position: absolute; left: 88px; right: 74px; height: 3px; top: 50%; transform-origin: center; }
.kl-sd-line--supply { background: var(--moss); transform: rotate(31deg); }
.kl-sd-line--demand { background: var(--honey); transform: rotate(-31deg); }
.kl-sd-dot { position: absolute; width: 18px; height: 18px; border-radius: 50%; background: var(--bark); left: calc(50% - 9px); top: calc(50% - 9px); }
.kl-sd-label { position: absolute; font-size: 13px; font-weight: 700; color: var(--muted); }
.kl-sd-label--price { left: 0; top: 52px; transform: rotate(-90deg); }
.kl-sd-label--quantity { right: 20px; bottom: 14px; }
.kl-rule-card { display: grid; gap: 12px; padding: 26px; border-radius: 18px; background: var(--moss); color: var(--cream); }
.kl-rule-card strong { font-family: var(--disp); font-size: clamp(30px, 4vw, 44px); letter-spacing: -0.03em; }
.kl-rule-row { display: flex; justify-content: space-between; gap: 12px; padding: 18px 20px; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.kl-tip-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.kl-tip-card__num, .kl-part-card__share { font-family: var(--disp); font-size: 32px; font-weight: 800; letter-spacing: -0.03em; color: var(--moss); }
.kl-equation { display: inline-flex; flex-wrap: wrap; gap: 10px; align-items: center; font-family: var(--disp); font-size: clamp(24px, 4vw, 38px); font-weight: 800; letter-spacing: -0.03em; }
.kl-equation span { display: inline-flex; align-items: center; justify-content: center; min-width: 56px; min-height: 56px; padding: 0 16px; border-radius: 999px; background: var(--white); border: 1px solid var(--line); }
.kl-part-card__bar { margin-top: 12px; height: 12px; border-radius: 999px; overflow: hidden; background: var(--cream-2); }
.kl-part-card__bar span { display: block; height: 100%; border-radius: 999px; }
.kl-highlight-box { padding: 26px 28px; border-radius: 20px; background: rgba(214,162,76,0.14); border: 1px solid rgba(214,162,76,0.35); color: #6f5214; }
.kl-explainer-pagination { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 24px; }
.kl-nextprev { display: grid; gap: 8px; text-decoration: none; color: inherit; }
.kl-nextprev strong { font-family: var(--disp); font-size: 24px; letter-spacing: -0.03em; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  :root { --gut: 22px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .kl-check-grid, .kl-parts-grid, .kl-quad-grid, .kl-tip-grid, .kl-explainer-pagination { grid-template-columns: 1fr; }
  .kl-factor, .kl-step { grid-template-columns: 1fr; }
  .kl-choice__arrow { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .nav-links { position: fixed; inset: 74px 0 auto 0; flex-direction: column; align-items: flex-start;
    gap: 0; background: var(--cream); border-bottom: 1px solid var(--line); padding: 8px 22px 18px;
    transform: translateY(-120%); transition: transform .28s ease; box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
  .nav-links.open { transform: none; }
  .nav-links a { width: 100%; padding: 13px 0; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: block; }
  .hide-mobile { display: none !important; }
}