/* ============================================================
   CompoundKu — style.css  v3.0.0
   Single CSS file for all pages (calculator + education)
   ============================================================ */

/* ── 1. DESIGN TOKENS ───────────────────────────────────────── */
:root {
  --bg:       #111318;
  --bg2:      #16191f;
  --bg3:      #1c1f27;
  --card:     #1e2229;
  --card2:    #23272f;
  --border:   #2a2f3a;
  --border2:  #363c4a;
  --accent:   #3b82f6;
  --accent-g: #10b981;
  --accent-r: #f43f5e;
  --accent-y: #f59e0b;
  --acc-dim:  rgba(59,130,246,.10);
  --grn-dim:  rgba(16,185,129,.10);
  --text:     #e8eaf0;
  --text2:    #8b92a8;
  --text3:    #565d72;
  --r:  12px;  --r2: 8px;  --r3: 6px;
  --f: 'Plus Jakarta Sans', sans-serif;
  --ease: .18s ease;
  --shadow-s: 0 2px 8px rgba(0,0,0,.3);
}
[data-theme="light"] {
  --bg:       #f4f6fb;  --bg2:    #eaecf4;  --bg3:    #dde1ee;
  --card:     #ffffff;  --card2:  #f7f8fd;
  --border:   #d4d8e8;  --border2:#c0c6da;
  --accent:   #2563eb;  --accent-g:#059669; --accent-r:#e11d48; --accent-y:#d97706;
  --acc-dim:  rgba(37,99,235,.08);  --grn-dim: rgba(5,150,105,.08);
  --text:     #111827;  --text2:  #4b5680;  --text3:  #8892ad;
  --shadow-s: 0 2px 8px rgba(0,0,0,.08);
}

/* ── 2. RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust:100%; text-size-adjust:100%; }
body {
  font-family: var(--f); background: var(--bg); color: var(--text);
  line-height: 1.6; width: 100%; max-width: 100%; overflow-x: hidden;
  transition: background .25s, color .25s; min-height: 100vh;
}
button { cursor: pointer; border: none; background: none; font-family: var(--f); }
input, select { font-family: var(--f); }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ── 3. SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── 4. HEADER ──────────────────────────────────────────────── */
header {
  position: sticky; top: 0; z-index: 200;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border); width: 100%;
}
.hdr {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 max(12px, env(safe-area-inset-left));
  height: 54px; gap: 12px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 17px; color: var(--text);
  flex-shrink: 0; white-space: nowrap;
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-g));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; overflow: hidden;
}
.logo-mark svg { width: 18px; height: 18px; }
.logo em { font-style: normal; color: var(--accent); }
nav { display: flex; gap: 2px; }
nav a {
  font-size: 13px; font-weight: 500; color: var(--text2);
  padding: 5px 10px; border-radius: 6px;
  transition: color var(--ease), background var(--ease); white-space: nowrap;
}
nav a:hover, nav a.active { color: var(--text); background: var(--card2); }
.hdr-right { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.icon-btn {
  width: 34px; height: 34px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--card);
  color: var(--text2); font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--ease); flex-shrink: 0;
}
.icon-btn:hover { border-color: var(--border2); color: var(--text); }
#installBtn { display: none; }
#installBtn.visible { display: flex; }
.hbg { display: none; flex-direction: column; gap: 4px; }
.hbg span { display: block; width: 16px; height: 1.5px; background: currentColor; border-radius: 1px; margin: auto; transition: all .25s; }

/* Language toggle */
.lang-btn {
  display: flex; background: var(--card); border: 1px solid var(--border);
  border-radius: 7px; overflow: hidden; flex-shrink: 0;
}
.lang-opt {
  padding: 5px 9px; font-size: 11.5px; font-weight: 700;
  color: var(--text3); border-radius: 0; transition: all .15s;
  letter-spacing: .3px;
}
.lang-opt.on { background: var(--accent); color: #fff; }
.lang-opt:hover:not(.on) { color: var(--text); background: var(--card2); }

/* ── 5. HERO (calculator page) ──────────────────────────────── */
.hero { text-align: center; padding: 36px 16px 28px; max-width: 1280px; margin: 0 auto; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--acc-dim); border: 1px solid rgba(59,130,246,.22);
  color: var(--accent); border-radius: 100px;
  font-size: 11px; font-weight: 600; padding: 3px 12px; margin-bottom: 14px;
  letter-spacing: .4px; text-transform: uppercase;
}
h1 { font-size: clamp(22px,5vw,44px); font-weight: 800; line-height: 1.15; margin-bottom: 10px; letter-spacing: -.5px; }
h1 em { font-style: normal; color: var(--accent); }
.hero-p { font-size: clamp(13px,2vw,15.5px); color: var(--text2); max-width: 480px; margin: 0 auto 22px; }
.mode-wrap { display: flex; justify-content: center; margin-bottom: 28px; }
.mode-box {
  display: inline-flex; background: var(--card); border: 1px solid var(--border);
  border-radius: 100px; padding: 4px; gap: 4px;
}
.mode-btn { padding: 7px 16px; border-radius: 100px; font-size: 13px; font-weight: 600; color: var(--text2); transition: all .2s; }
.mode-btn.on { background: var(--accent); color: #fff; box-shadow: 0 2px 10px rgba(59,130,246,.35); }

/* ── 6. MAIN LAYOUT ─────────────────────────────────────────── */
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 16px 56px; display: grid; grid-template-columns: 1fr 300px; gap: 16px; align-items: start; }
.main-col { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.side-col  { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

/* ── 7. CARDS ───────────────────────────────────────────────── */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; transition: border-color var(--ease); min-width: 0; width: 100%; }
.card:hover { border-color: var(--border2); }
.ch { padding: 14px 16px 0; display: flex; align-items: center; gap: 8px; }
.ch h2 { font-size: 14px; font-weight: 700; color: var(--text); }
.cico { width: 28px; height: 28px; border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: 13px; flex-shrink: 0; }
.cb { padding: 12px 16px 18px; }

/* ── 8. SEGMENT CONTROL ─────────────────────────────────────── */
.seg-label { font-size: 10.5px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 7px; }
.seg { display: flex; width: 100%; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--r2); padding: 3px; gap: 3px; margin-bottom: 16px; }
.seg-btn { flex: 1; padding: 7px 6px; border-radius: 6px; font-size: 12.5px; font-weight: 600; color: var(--text2); transition: all .18s; text-align: center; }
.seg-btn.on { background: var(--card); color: var(--text); box-shadow: var(--shadow-s); }

/* ── 9. INSTRUMENT PRESETS ──────────────────────────────────── */
.pre-label { font-size: 10.5px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 7px; }
.presets { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 18px; }
.pre-btn { padding: 4px 10px; border-radius: 100px; border: 1px solid var(--border2); font-size: 11.5px; font-weight: 500; color: var(--text2); background: var(--card2); transition: all .15s; white-space: nowrap; }
.pre-btn:hover { border-color: var(--accent); color: var(--accent); }
.pre-btn.on { border-color: var(--accent); background: var(--acc-dim); color: var(--accent); font-weight: 600; }

/* ── 10. FORM ELEMENTS ──────────────────────────────────────── */
.fg { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.fi { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.fi.full { grid-column: 1 / -1; }

label { font-size: 10.5px; font-weight: 700; color: var(--text2); text-transform: uppercase; letter-spacing: .5px; display: flex; align-items: center; gap: 4px; }
.iw { position: relative; display: flex; align-items: center; min-width: 0; }
.ipfx { position: absolute; left: 10px; font-size: 12.5px; font-weight: 600; color: var(--text3); pointer-events: none; user-select: none; z-index: 1; }
.isfx { position: absolute; right: 10px; font-size: 12.5px; font-weight: 600; color: var(--text3); pointer-events: none; user-select: none; z-index: 1; }

input[type="text"], input[type="number"], select {
  width: 100%; min-width: 0; background: var(--bg3);
  border: 1.5px solid var(--border); border-radius: var(--r2);
  padding: 8px 11px; color: var(--text); font-size: 13.5px; font-weight: 500;
  outline: none; transition: border-color .15s, box-shadow .15s;
  appearance: none; -webkit-appearance: none; max-width: 100%;
}
input[type="text"]::placeholder { color: var(--text3); font-weight: 400; }
.pfx input { padding-left: 33px; }
.sfx-input { padding-right: 44px !important; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--acc-dim); }
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='11' viewBox='0 0 24 24' fill='none' stroke='%23565d72' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
  padding-right: 30px; cursor: pointer;
}

/* ── 11. TOGGLE SWITCH ──────────────────────────────────────── */
.trow { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-top: 1px solid var(--border); margin-top: 4px; gap: 8px; }
.tlbl { font-size: 12.5px; font-weight: 500; color: var(--text2); display: flex; align-items: center; gap: 5px; flex: 1; min-width: 0; }
.tsw { position: relative; width: 36px; height: 20px; display: inline-block; flex-shrink: 0; }
.tsw input { opacity: 0; width: 0; height: 0; }
.tsl { position: absolute; inset: 0; background: var(--border2); border-radius: 10px; cursor: pointer; transition: background .18s; }
.tsl::before { content: ''; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: #fff; left: 3px; top: 3px; transition: transform .18s; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.tsw input:checked + .tsl { background: var(--accent-g); }
.tsw input:checked + .tsl::before { transform: translateX(16px); }
.inf-row { display: none; }
.inf-row.show { display: grid; }

/* ── 12. SUMMARY CARDS ──────────────────────────────────────── */
.sum-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.sum-card {
  background: var(--card2); border: 1px solid var(--border); border-radius: var(--r2);
  padding: 12px 12px 10px; display: flex; flex-direction: column; gap: 2px;
  position: relative; overflow: hidden; height: 88px; min-height: 88px; max-height: 88px; min-width: 0;
}
.sum-card::after { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2.5px; border-radius: 1px; }
.sum-main::after  { background: linear-gradient(90deg, var(--accent), var(--accent-g)); }
.sum-modal::after { background: var(--accent-g); }
.sum-bunga::after { background: var(--accent-r); }
.slbl { font-size: 9.5px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sval { font-size: 13px; font-weight: 700; color: var(--text); line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-height: 19px; flex: 1; }
.sum-main .sval { color: var(--accent); font-size: 14px; }
.ssub { font-size: 9.5px; color: var(--text3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mult { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; font-size: 12.5px; color: var(--text2); margin-top: 9px; padding-top: 9px; border-top: 1px solid var(--border); }
.mult strong { color: var(--accent-g); font-size: 13.5px; font-weight: 700; }

/* ── 13. CHART ──────────────────────────────────────────────── */
.ctabs { display: flex; gap: 3px; padding: 12px 16px 0; }
.ctab { padding: 5px 12px; border-radius: 6px; font-size: 11.5px; font-weight: 600; color: var(--text3); transition: all .15s; }
.ctab.on { background: var(--acc-dim); color: var(--accent); }
.ctab:hover:not(.on) { background: var(--card2); color: var(--text2); }
.cbox { padding: 12px 12px 8px; min-height: 260px; }
.cpanel { display: none; width: 100%; }
.cpanel.on { display: block; }
/* PIE CHART FIX — fixed container forces Chart.js to render at proper size */
.pie-wrap { display: flex; align-items: center; gap: 20px; width: 100%; flex-wrap: wrap; justify-content: center; padding: 4px 0; }
.pie-canvas-wrap { position: relative; width: 240px; height: 240px; min-width: 200px; flex-shrink: 0; }
.pie-canvas-wrap canvas { position: absolute; inset: 0; }
.pie-leg { display: flex; flex-direction: column; gap: 12px; flex: 1; min-width: 140px; }
.leg-row { display: flex; align-items: flex-start; gap: 10px; }
.leg-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; margin-top: 3px; }
.leg-label { font-size: 11px; color: var(--text3); margin-bottom: 2px; }
.leg-val   { font-size: 14px; font-weight: 700; color: var(--text); }
.leg-pct   { font-size: 11px; color: var(--text3); }

/* ── 14. TABLE ──────────────────────────────────────────────── */
.tscroll { max-height: 300px; overflow-y: auto; }
.tw { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
thead th { background: var(--bg3); color: var(--text3); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; padding: 8px 12px; text-align: right; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1; white-space: nowrap; }
thead th:first-child { text-align: left; }
tbody tr { border-bottom: 1px solid var(--border); transition: background .12s; }
tbody tr:hover { background: var(--card2); }
tbody tr:last-child { border-bottom: none; }
td { padding: 8px 12px; text-align: right; color: var(--text2); white-space: nowrap; }
td:first-child { text-align: left; font-weight: 600; color: var(--text); }
td.pos { color: var(--accent-g); font-weight: 600; }
td.pct-col { color: var(--accent); font-size: 11.5px; }

/* ── 15. TARGET RESULT ──────────────────────────────────────── */
.tgt-res { background: var(--grn-dim); border: 1px solid rgba(16,185,129,.22); border-radius: var(--r2); padding: 16px; display: flex; flex-direction: column; gap: 4px; margin-top: 12px; }
.tgt-lbl { font-size: 10.5px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .6px; }
.tgt-val { font-size: 24px; font-weight: 800; color: var(--accent-g); line-height: 1.1; letter-spacing: -.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tgt-sub { font-size: 12.5px; color: var(--text2); }

/* ── 16. SIDEBAR STATS ──────────────────────────────────────── */
.ms { display: flex; flex-direction: column; gap: 6px; }
.ms-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 11px; background: var(--card2); border: 1px solid var(--border); border-radius: var(--r2); font-size: 12.5px; gap: 8px; min-width: 0; }
.ms-lbl { color: var(--text2); flex-shrink: 0; }
.ms-val { font-weight: 700; color: var(--text); text-align: right; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.ms-val.g { color: var(--accent-g); }

/* ── 17. TIPS ───────────────────────────────────────────────── */
.tip-item { display: flex; gap: 8px; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: 12.5px; }
.tip-item:last-child { border-bottom: none; padding-bottom: 0; }
.tip-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-g); flex-shrink: 0; margin-top: 7px; }
.ttxt { color: var(--text2); line-height: 1.55; }
.ttxt strong { color: var(--text); font-weight: 600; }

/* ── 18. EDU PROMO BANNER ───────────────────────────────────── */
.edu-banner { background: var(--bg2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 40px 16px; }
.edu-container { max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.edu-content { flex: 1; min-width: 240px; }
.edu-badge { font-size: 11px; font-weight: 700; color: var(--accent-g); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 8px; }
.edu-title { font-size: clamp(20px,3vw,28px); font-weight: 800; margin-bottom: 8px; letter-spacing: -.3px; }
.edu-desc { font-size: 14px; color: var(--text2); max-width: 480px; line-height: 1.65; }
.edu-actions { display: flex; flex-direction: column; gap: 10px; flex-shrink: 0; }
.edu-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 10px; background: var(--accent-g); color: #fff; font-size: 14px; font-weight: 700; text-decoration: none; transition: opacity .15s; }
.edu-btn:hover { opacity: .85; }
.edu-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.edu-tags span { font-size: 11.5px; background: var(--card); border: 1px solid var(--border); border-radius: 100px; padding: 4px 10px; color: var(--text2); }

/* ── 19. FAQ ────────────────────────────────────────────────── */
.faq-sec { background: var(--bg); border-top: 1px solid var(--border); padding: 48px 16px; }
.faq-inner { max-width: 800px; margin: 0 auto; }
.faq-h { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.faq-sub { color: var(--text2); margin-bottom: 24px; font-size: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--r2); margin-bottom: 8px; overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--card); font-size: 14px; font-weight: 600; color: var(--text); cursor: pointer; text-align: left; gap: 12px; transition: background var(--ease); }
.faq-q:hover { background: var(--card2); }
.faq-q::after { content: '+'; font-size: 18px; color: var(--text3); flex-shrink: 0; transition: transform .2s; }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { display: none; padding: 14px 16px; font-size: 13.5px; color: var(--text2); background: var(--card2); line-height: 1.7; border-top: 1px solid var(--border); }
.faq-item.open .faq-a { display: block; }

/* ── 20. FOOTER ─────────────────────────────────────────────── */
footer { background: var(--bg); border-top: 1px solid var(--border); padding: 32px 16px 20px; }
.ft-in { max-width: 1280px; margin: 0 auto; }
.ft-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.ft-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16px; color: var(--text); margin-bottom: 9px; }
.ft-logo em { font-style: normal; color: var(--accent); }
.ft-desc { font-size: 12.5px; color: var(--text3); line-height: 1.7; max-width: 250px; }
.ft-col h4 { font-size: 11.5px; font-weight: 700; color: var(--text); margin-bottom: 9px; text-transform: uppercase; letter-spacing: .5px; }
.ft-col a { display: block; font-size: 12.5px; color: var(--text3); padding: 2px 0; transition: color var(--ease); }
.ft-col a:hover { color: var(--accent); }
.ft-btm { border-top: 1px solid var(--border); padding-top: 16px; display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.ft-copy { font-size: 11.5px; color: var(--text3); }
.disclaimer { font-size: 11px; color: var(--text3); max-width: 560px; line-height: 1.65; }
.disclaimer strong { color: var(--accent-y); }

/* ── 21. MOBILE NAV ─────────────────────────────────────────── */
.mob-nav { display: none; position: fixed; top: 54px; left: 0; right: 0; background: var(--card); border-bottom: 1px solid var(--border); z-index: 180; padding: 10px 16px; flex-direction: column; gap: 3px; box-shadow: 0 4px 20px rgba(0,0,0,.3); }
.mob-nav.open { display: flex; }
.mob-nav a { font-size: 14px; font-weight: 500; color: var(--text2); padding: 8px 11px; border-radius: 7px; transition: all var(--ease); }
.mob-nav a:hover, .mob-nav a.active { background: var(--card2); color: var(--text); }

/* ── 22. PWA INSTALL TOAST ──────────────────────────────────── */
.install-toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 14px 18px; display: flex; align-items: center; gap: 12px; box-shadow: 0 8px 30px rgba(0,0,0,.4); z-index: 300; max-width: calc(100vw - 32px); width: 360px; opacity: 0; transition: all .3s ease; pointer-events: none; }
.install-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.toast-text { flex: 1; min-width: 0; }
.toast-title { font-size: 13.5px; font-weight: 700; color: var(--text); }
.toast-sub   { font-size: 11.5px; color: var(--text2); }
.toast-actions { display: flex; gap: 6px; flex-shrink: 0; }
.toast-btn-ok { padding: 6px 14px; border-radius: 6px; background: var(--accent); color: #fff; font-size: 12.5px; font-weight: 600; transition: opacity .15s; }
.toast-btn-ok:hover { opacity: .85; }
.toast-btn-skip { padding: 6px 10px; border-radius: 6px; font-size: 12.5px; font-weight: 600; color: var(--text3); }

/* ── 23. ANIMATIONS ─────────────────────────────────────────── */
@keyframes fadeUp { from { opacity:0; transform: translateY(12px); } to { opacity:1; transform: translateY(0); } }
@keyframes valPop { from { opacity:0; transform: translateY(4px); }  to { opacity:1; transform: translateY(0); } }
.ain { animation: fadeUp .35s ease both; }
.pop { animation: valPop .22s ease; }

/* ── 24. EDUCATION PAGE SPECIFIC ────────────────────────────── */

/* Hero */
.edu-hero { text-align: center; padding: 44px 16px 32px; max-width: 900px; margin: 0 auto; }
.edu-hero h1 { font-size: clamp(24px,5vw,40px); font-weight: 800; line-height: 1.15; margin-bottom: 12px; letter-spacing: -.5px; }
.edu-hero h1 em { font-style: normal; color: var(--accent-g); }
.edu-hero .hero-sub { font-size: clamp(14px,2vw,16px); color: var(--text2); max-width: 560px; margin: 0 auto 24px; }

/* Back link */
.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--text2); padding: 7px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); transition: all var(--ease); margin-bottom: 28px; }
.back-link:hover { color: var(--accent); border-color: var(--accent); }

/* Module quick-nav */
.module-nav { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.mnav-btn { padding: 6px 14px; border-radius: 100px; border: 1px solid var(--border); background: var(--card); font-size: 12.5px; font-weight: 600; color: var(--text2); transition: all .18s; cursor: pointer; white-space: nowrap; }
.mnav-btn:hover { border-color: var(--accent-g); color: var(--accent-g); }
.mnav-btn.active { border-color: var(--accent-g); background: var(--grn-dim); color: var(--accent-g); }

/* Edu page container */
.edu-page { max-width: 900px; margin: 0 auto; padding: 0 16px 64px; }

/* Module accordion */
.module { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; margin-bottom: 16px; scroll-margin-top: 74px; }
.module-header { display: flex; align-items: center; gap: 14px; padding: 20px 22px; cursor: pointer; transition: background var(--ease); user-select: none; }
.module-header:hover { background: var(--card2); }
.module-num { width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 800; background: var(--grn-dim); color: var(--accent-g); }
.module-meta { flex: 1; min-width: 0; }
.module-meta h2 { font-size: 15.5px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.module-meta p  { font-size: 12.5px; color: var(--text2); }
.module-badge { font-size: 10.5px; font-weight: 700; color: var(--accent-g); background: var(--grn-dim); border: 1px solid rgba(16,185,129,.2); padding: 3px 10px; border-radius: 100px; white-space: nowrap; flex-shrink: 0; }
.module-chevron { font-size: 18px; color: var(--text3); flex-shrink: 0; transition: transform .25s; }
.module.open .module-chevron { transform: rotate(180deg); }
.module-body { display: none; border-top: 1px solid var(--border); }
.module.open .module-body { display: block; }

/* Lessons */
.lessons { padding: 18px 22px 22px; display: flex; flex-direction: column; }
.lesson { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.lesson:last-child { border-bottom: none; padding-bottom: 0; }
.lesson-body { flex: 1; min-width: 0; }
.lesson-title { font-size: 14.5px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.lesson-desc  { font-size: 13px; color: var(--text2); line-height: 1.65; }

/* Concept grid */
.concept-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 10px; margin: 14px 0; }
.concept-box { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--r2); padding: 14px 16px; }
.concept-box h4 { font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 5px; }
.concept-box p  { font-size: 12.5px; color: var(--text2); line-height: 1.6; }

/* Formula box */
.fbox { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--r2); padding: 14px 16px; font-family: 'Courier New', monospace; font-size: 12.5px; color: var(--accent-g); margin: 12px 0; line-height: 1.9; overflow-x: auto; }

/* Callouts */
.callout { display: flex; gap: 12px; align-items: flex-start; padding: 13px 16px; border-radius: var(--r2); margin: 14px 0; font-size: 13px; line-height: 1.65; }
.callout.blue  { background: var(--acc-dim); border: 1px solid rgba(59,130,246,.2); color: var(--text2); }
.callout.green { background: var(--grn-dim); border: 1px solid rgba(16,185,129,.2); color: var(--text2); }
.callout.warn  { background: rgba(245,158,11,.08); border: 1px solid rgba(245,158,11,.2); color: var(--text2); }
.callout-icon  { font-size: 16px; flex-shrink: 0; margin-top: 2px; }
.callout strong { color: var(--text); }

/* Steps */
.steps { display: flex; flex-direction: column; gap: 11px; margin: 14px 0; }
.step { display: flex; gap: 12px; align-items: flex-start; }
.step-num { width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 800; background: var(--accent); color: #fff; }
.step-text { flex: 1; font-size: 13.5px; color: var(--text2); line-height: 1.6; padding-top: 3px; }
.step-text strong { color: var(--text); }

/* Tags */
.tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.tag  { padding: 3px 10px; border-radius: 100px; font-size: 11.5px; font-weight: 600; background: var(--card2); border: 1px solid var(--border); color: var(--text2); }

/* Edu tables */
.tbl-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 12px 0; border-radius: var(--r2); border: 1px solid var(--border); }
.tbl-scroll .e-table { margin: 0; min-width: 460px; border: none; }
.tbl-scroll .e-table tr:last-child td { border-bottom: none; }
.e-table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 13px; }
.e-table th { background: var(--bg3); color: var(--text3); font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.e-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); color: var(--text2); vertical-align: top; }
.e-table tr:last-child td { border-bottom: none; }
.e-table tr:hover td { background: var(--card2); }
.e-table td:first-child { font-weight: 600; color: var(--text); }
.e-green { color: var(--accent-g) !important; font-weight: 600 !important; }
.e-red   { color: var(--accent-r) !important; }

/* Read-time badge */
.read-time { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; color: var(--text3); background: var(--bg3); border: 1px solid var(--border); border-radius: 100px; padding: 2px 9px; margin-bottom: 10px; }

/* CTA box */
.cta-box { background: linear-gradient(135deg, var(--grn-dim), var(--acc-dim)); border: 1px solid rgba(16,185,129,.25); border-radius: var(--r); padding: 28px; text-align: center; margin: 28px 0; }
.cta-box h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.cta-box p  { font-size: 14px; color: var(--text2); margin-bottom: 18px; }
.cta-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 24px; border-radius: 10px; background: var(--accent-g); color: #fff; font-size: 14px; font-weight: 700; transition: opacity .15s; }
.cta-btn:hover { opacity: .88; }
/* Hitung / Calculate button */
.btn-calc { display: flex; align-items: center; justify-content: center; width: 100%; padding: 15px 24px; margin-top: 24px; border-radius: 10px; background: var(--accent); color: #fff; font-size: 15px; font-weight: 700; letter-spacing: .15px; cursor: pointer; border: none; transition: opacity .15s, transform .1s, box-shadow .15s; font-family: inherit; box-shadow: 0 4px 14px rgba(59,130,246,.35); }
.btn-calc:hover { opacity: .92; box-shadow: 0 6px 20px rgba(59,130,246,.45); }
.btn-calc:active { transform: scale(.98); box-shadow: 0 2px 8px rgba(59,130,246,.25); }

/* ── 25. RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .wrap { grid-template-columns: 1fr; }
  .side-col { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 14px; }
  nav { display: none; }
  .hbg { display: flex; }
  .ft-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .fg { grid-template-columns: 1fr; }
  .fi.full { grid-column: 1; }
  h1 { font-size: 22px; }
  .pie-wrap { flex-direction: column; }
  .pie-canvas-wrap { width: 200px; height: 200px; min-width: 160px; }
  .ft-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 24px; }
  .wrap { padding: 0 12px 48px; }
  .cb { padding: 10px 14px 16px; }
  .ch { padding: 13px 14px 0; }
  .ctabs { padding: 10px 14px 0; gap: 2px; }
  .ctab { padding: 4px 9px; font-size: 11px; }
  .sum-grid { gap: 6px; }
  .sum-card { padding: 10px 10px 8px; }
  .sval { font-size: 12px; }
  .sum-main .sval { font-size: 13px; }
  .module-header { padding: 16px; gap: 10px; }
  .lessons { padding: 14px 16px 18px; }
  .module-meta h2 { font-size: 14px; }
  .module-badge { display: none; }
  .concept-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .sum-grid { grid-template-columns: 1fr 1fr; }
  .sum-main { grid-column: 1 / -1; }
  .pre-btn { font-size: 10.5px; padding: 3px 8px; }
  .mode-btn { font-size: 12px; padding: 6px 12px; }
  .seg-btn { font-size: 11.5px; padding: 6px 4px; }
}