/* =========================================================
   MATEMATIKA KEUANGAN — stylesheet
   Design: navy/teal academic palette, Fraunces + Manrope + JetBrains Mono
   (diadaptasi dari template Barisan & Deret Aritmetika)
   ========================================================= */

:root {
  --ink: #101828;
  --ink-soft: #4B5565;
  --ink-faint: #8A93A3;
  --navy: #16233F;
  --navy-deep: #0B1526;
  --teal: #0EA5A0;
  --teal-deep: #0A7E7A;
  --teal-pale: #E4F5F3;
  --amber: #F0A93C;
  --amber-deep: #C77F14;
  --amber-pale: #FCF0DA;
  --violet: #7C5CFC;
  --violet-deep: #5A3FD6;
  --violet-pale: #EEEAFF;
  --paper: #F7F7F4;
  --surface: #FFFFFF;
  --line: #E4E5E0;
  --line-strong: #CDD0C8;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 4px 18px rgba(16, 24, 40, 0.07);
  --shadow-lift: 0 12px 32px rgba(16, 24, 40, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --nav-h: 68px;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: -1px -1px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
section { scroll-margin-top: calc(var(--nav-h) + 14px); }
#tunggal, #majemuk, #anuitas { scroll-margin-top: calc(var(--nav-h) + 14px); }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--navy); margin: 0 0 .5em; line-height: 1.15; }
p { margin: 0 0 1em; color: var(--ink-soft); }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
.mono { font-family: var(--font-mono); }
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* ---------- Progress bar ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--teal), var(--amber));
  z-index: 1000;
  transition: width .1s linear;
}

/* ---------- Top nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(247, 247, 244, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  z-index: 900;
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--navy);
  display: flex; align-items: flex-end; justify-content: center; gap: 2px;
  padding: 5px 5px 4px;
}
.brand-mark span { width: 4px; background: var(--teal); border-radius: 1px; }
.brand-mark span:nth-child(1){ height: 6px; }
.brand-mark span:nth-child(2){ height: 11px; }
.brand-mark span:nth-child(3){ height: 16px; }
.brand-mark span:nth-child(4){ height: 21px; background: var(--amber); }
.brand-text { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--navy); }
.brand-text small { display: block; font-family: var(--font-body); font-weight: 500; font-size: .68rem; color: var(--ink-faint); letter-spacing: .02em; }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: inline-block; padding: 9px 14px; border-radius: 999px;
  text-decoration: none; font-weight: 600; font-size: .89rem; color: var(--ink-soft);
  transition: background .15s ease, color .15s ease;
}
.nav-links a:hover { background: var(--teal-pale); color: var(--teal-deep); }
.nav-links a.active { background: var(--navy); color: #fff; }

.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--line-strong); background: var(--surface);
  align-items: center; justify-content: center; cursor: pointer;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--navy); border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span { margin: 4px 0; }
.nav-toggle.open span { opacity: 0; }
.nav-toggle.open::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open::after { transform: translateY(-6px) rotate(-45deg); }

.mobile-panel {
  display: none;
  position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--surface); border-bottom: 1px solid var(--line);
  z-index: 899; padding: 10px 20px 20px;
  box-shadow: var(--shadow);
}
.mobile-panel.open { display: block; }
.mobile-panel a {
  display: block; padding: 12px 6px; text-decoration: none; color: var(--ink);
  font-weight: 700; font-size: 1.02rem; border-bottom: 1px solid var(--line);
}
.mobile-panel a:last-child { border-bottom: none; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--nav-h) + 56px) 0 60px;
  position: relative;
  overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--teal-deep); background: var(--teal-pale); border: 1px solid #C7E9E6;
  padding: 6px 12px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); font-weight: 600; letter-spacing: -.01em; }
.hero h1 em { font-style: normal; color: var(--teal-deep); }
.hero-lede { font-size: 1.08rem; max-width: 46ch; }
.hero-meta { font-size: .88rem; color: var(--ink-faint); margin-top: -6px; margin-bottom: 22px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-weight: 700; font-size: .93rem;
  padding: 13px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); box-shadow: var(--shadow-lift); }
.btn-ghost { background: var(--surface); color: var(--navy); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--navy); }
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: var(--teal-deep); }
.btn-sm { padding: 9px 16px; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Hero staircase widget */
.stair-card {
  background: var(--navy); border-radius: var(--radius-lg); padding: 26px 24px 22px;
  box-shadow: var(--shadow-lift); color: #fff; position: relative;
}
.stair-card-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.stair-card-head h3 { color: #fff; font-size: 1rem; margin: 0; font-weight: 600; }
.stair-formula { font-family: var(--font-mono); font-size: .86rem; color: var(--teal); }
.stair-chart {
  display: flex; align-items: flex-end; gap: 8px; height: 190px;
  border-bottom: 1px solid rgba(255,255,255,.18); padding-bottom: 4px; margin-bottom: 16px;
}
.stair-bar {
  flex: 1; background: linear-gradient(180deg, var(--teal), var(--teal-deep));
  border-radius: 5px 5px 2px 2px; position: relative; min-height: 4px;
  transition: height .35s cubic-bezier(.2,.8,.2,1);
}
.stair-bar span {
  position: absolute; top: -20px; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: .68rem; color: rgba(255,255,255,.85);
}
.stair-controls { display: flex; align-items: center; gap: 14px; }
.stair-controls label { font-size: .82rem; color: rgba(255,255,255,.75); white-space: nowrap; }
.stair-controls input[type="range"] { flex: 1; accent-color: var(--amber); }
.stair-b-val { font-family: var(--font-mono); font-weight: 700; color: var(--amber); min-width: 22px; text-align: right; }

/* ---------- Concept map cards ---------- */
.concept-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 18px; }
.concept-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .concept-grid.cols-3 { grid-template-columns: 1fr; } }
.concept-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.concept-card h4 { font-size: 1.08rem; margin-bottom: 6px; }
.concept-card .formula { font-family: var(--font-mono); font-weight: 700; color: var(--navy); font-size: 1.15rem; margin: 8px 0; }
.concept-card.teal { border-top: 4px solid var(--teal); }
.concept-card.amber { border-top: 4px solid var(--amber); }
.concept-card.violet { border-top: 4px solid var(--violet); }
.concept-card .formula sup { font-size: .65em; }

/* ---------- Section framing ---------- */
.section { padding: 78px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 34px; }
.section-kicker {
  font-family: var(--font-mono); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--teal-deep); margin-bottom: 8px; display: block;
}
.section-kicker.violet { color: var(--violet-deep); }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }

/* staircase divider between major sections */
.stair-divider { display: flex; align-items: flex-end; gap: 4px; height: 26px; margin: 0 auto 0; width: 130px; opacity: .5; }
.stair-divider i { flex: 1; background: var(--line-strong); border-radius: 2px 2px 0 0; }
.stair-divider i:nth-child(1){ height: 30%; } .stair-divider i:nth-child(2){ height: 48%; }
.stair-divider i:nth-child(3){ height: 66%; } .stair-divider i:nth-child(4){ height: 84%; }
.stair-divider i:nth-child(5){ height: 100%; }

/* ---------- Formula box ---------- */
.formula-box {
  background: var(--navy); color: #fff; border-radius: var(--radius);
  padding: 22px 26px; margin: 20px 0 30px; text-align: center;
}
.formula-box .label { font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; color: rgba(255,255,255,.6); margin-bottom: 8px; }
.formula-box .formula { font-family: var(--font-mono); font-size: clamp(1.15rem, 2.6vw, 1.55rem); font-weight: 700; color: var(--teal); }
.formula-box .formula.alt { color: var(--amber); }
.formula-box .formula.violet { color: var(--violet); }
.formula-box .formula sup { font-size: .6em; vertical-align: super; }
.formula-box .note { font-size: .82rem; color: rgba(255,255,255,.65); margin-top: 10px; }

/* ---------- Calculator widget ---------- */
.calc {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px; box-shadow: var(--shadow); margin-bottom: 40px;
}
.calc-head { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.calc-badge {
  width: 30px; height: 30px; border-radius: 9px; background: var(--teal-pale);
  color: var(--teal-deep); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: .85rem; flex-shrink: 0;
}
.calc-badge.violet { background: var(--violet-pale); color: var(--violet-deep); }
.calc h3 { margin: 0; font-size: 1.15rem; }
.calc-sub { font-size: .88rem; margin-bottom: 18px; color: var(--ink-faint); }
.calc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.field label { display: block; font-size: .78rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 11px 12px; border-radius: 10px; border: 1.5px solid var(--line-strong);
  font-family: var(--font-mono); font-size: .98rem; background: var(--paper); color: var(--ink);
}
.field input:focus { border-color: var(--teal); outline: none; background: #fff; }
.calc-result {
  background: var(--paper); border: 1px dashed var(--line-strong); border-radius: var(--radius);
  padding: 16px 18px; margin-top: 6px; display: none;
}
.calc-result.show { display: block; }
.calc-result .headline { font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem; color: var(--navy); margin-bottom: 8px; }
.calc-result ol { margin: 0; padding-left: 20px; color: var(--ink-soft); font-size: .92rem; }
.calc-result li { margin-bottom: 4px; font-family: var(--font-mono); }
.calc-viz { display: flex; align-items: flex-end; gap: 6px; height: 90px; margin-top: 16px; }
.calc-viz i { flex: 1; background: var(--teal); border-radius: 4px 4px 1px 1px; min-height: 3px; transition: height .3s ease; }
.calc-viz i.neg { background: var(--amber); }

/* ---------- Tabs ---------- */
.tabs { margin-top: 8px; }
.tab-list { display: inline-flex; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 4px; margin-bottom: 22px; }
.tab-btn {
  border: none; background: transparent; padding: 9px 18px; border-radius: 999px;
  font-family: var(--font-body); font-weight: 700; font-size: .87rem; color: var(--ink-faint); cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.tab-btn.active { background: var(--navy); color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Accordion example cards ---------- */
.example-list { display: flex; flex-direction: column; gap: 12px; }
.example {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
}
.example-header {
  width: 100%; display: flex; align-items: center; gap: 14px; text-align: left;
  padding: 16px 18px; background: none; border: none; cursor: pointer; font-family: var(--font-body);
}
.example-num {
  width: 30px; height: 30px; border-radius: 8px; background: var(--paper); border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-weight: 700;
  font-size: .82rem; color: var(--navy); flex-shrink: 0;
}
.example-title { font-weight: 700; font-size: .96rem; color: var(--ink); flex: 1; }
.example-title small { display: block; font-weight: 500; color: var(--ink-faint); font-size: .82rem; margin-top: 2px; }
.example-chevron { width: 18px; height: 18px; flex-shrink: 0; transition: transform .2s ease; color: var(--ink-faint); }
.example.open .example-chevron { transform: rotate(180deg); }
.example-body { max-height: 0; overflow: hidden; transition: max-height .28s ease; }
.example.open .example-body { max-height: 900px; }
.example-body-inner { padding: 0 18px 20px; border-top: 1px solid var(--line); }
.example-body-inner .steps { font-family: var(--font-mono); font-size: .88rem; color: var(--ink-soft); background: var(--paper); border-radius: 10px; padding: 12px 14px; margin: 12px 0; }
.example-body-inner .steps div { margin-bottom: 4px; }
.example-body-inner .steps div:last-child { margin-bottom: 0; }
.conclusion {
  background: var(--teal-pale); border: 1px solid #C7E9E6; color: var(--teal-deep);
  border-radius: 10px; padding: 10px 14px; font-weight: 700; font-size: .9rem; margin-top: 10px;
}

/* ---------- Task list (Tugas & PR — soal tanpa input, hanya daftar) ---------- */
.task-list {
  list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; counter-reset: tasknum;
}
.task-list li {
  position: relative; padding: 15px 18px 15px 52px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); font-size: .95rem;
  line-height: 1.6; color: var(--ink);
}
.task-list li::before {
  counter-increment: tasknum; content: counter(tasknum);
  position: absolute; left: 14px; top: 14px; width: 26px; height: 26px; border-radius: 50%;
  background: var(--paper); border: 1.5px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: .8rem; color: var(--teal-deep);
}
.task-list li.hots { background: var(--amber-pale); border-color: var(--amber); }
.task-list li.hots::before { background: #fff; border-color: var(--amber); color: var(--amber-deep); }
.task-list li.hots .hots-badge { background: #fff; }
.section-alt .task-list li { background: #fff; }
.section-alt .task-list li.hots { background: var(--amber-pale); }

/* ---------- Progressive section unlock ---------- */
.section-locked { display: none !important; }
.next-section-nav { margin-top: 40px; padding-top: 28px; border-top: 1px dashed var(--line-strong); text-align: center; }
.next-section-btn { padding: 15px 30px; font-size: .96rem; }

/* ---------- HOTS badge ---------- */
.hots-badge {
  display: inline-block; font-family: var(--font-mono); font-size: .66rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: var(--amber-deep);
  background: var(--amber-pale); border: 1px solid var(--amber); border-radius: 999px;
  padding: 2px 8px; margin-left: 6px; vertical-align: middle;
}

/* ---------- Quiz / Latihan ---------- */
.quiz-grid { display: flex; flex-direction: column; gap: 16px; }
.quiz-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.quiz-q { font-weight: 700; margin-bottom: 12px; font-size: .96rem; color: var(--ink); display: flex; gap: 10px; }
.quiz-q .qnum { font-family: var(--font-mono); color: var(--teal-deep); flex-shrink: 0; }
.quiz-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.quiz-row input[type="text"] {
  padding: 10px 12px; border-radius: 10px; border: 1.5px solid var(--line-strong);
  font-family: var(--font-mono); font-size: .95rem; width: 160px; background: var(--paper);
}
.quiz-row input:focus { border-color: var(--teal); outline: none; background: #fff; }
.quiz-feedback { font-size: .86rem; font-weight: 700; margin-left: 4px; }
.quiz-feedback.correct { color: var(--teal-deep); }
.quiz-feedback.wrong { color: var(--amber-deep); }
.quiz-explain { display: none; margin-top: 10px; font-size: .88rem; color: var(--ink-soft); background: var(--paper); border-radius: 8px; padding: 10px 12px; font-family: var(--font-mono); }
.quiz-explain.show { display: block; }
.quiz-toggle-explain { background: none; border: none; color: var(--teal-deep); font-weight: 700; font-size: .82rem; cursor: pointer; text-decoration: underline; padding: 0; }

/* ---------- Summary section ---------- */
.summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 30px; }
.summary-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .summary-grid.cols-3 { grid-template-columns: 1fr; } }
.tips-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.tips-list li { display: flex; gap: 12px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.tips-list .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); margin-top: 7px; flex-shrink: 0; }

/* ---------- LKPD ---------- */
.lkpd-shell { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow); }
.lkpd-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; flex-wrap: wrap; margin-bottom: 22px; padding-bottom: 20px; border-bottom: 1px dashed var(--line-strong); }
.lkpd-meta { font-size: .84rem; color: var(--ink-faint); }
.group-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 24px; }
.group-grid.lkpd-identity { grid-template-columns: 1.4fr 1fr 1fr; margin-bottom: 0; }
.group-grid input {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1.5px solid var(--line-strong);
  font-family: var(--font-body); font-size: .92rem; background: var(--paper);
}
.lkpd-step { border-left: 3px solid var(--teal); padding: 4px 0 4px 18px; margin-bottom: 26px; }
.lkpd-step h4 { font-size: 1.02rem; margin-bottom: 6px; }
.lkpd-fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 12px 0; }
.lkpd-fields.two { grid-template-columns: repeat(2, 1fr); }
.lkpd-fields .field input { background: #fff; }
textarea.lkpd-textarea {
  width: 100%; min-height: 90px; border-radius: 10px; border: 1.5px solid var(--line-strong);
  padding: 12px; font-family: var(--font-body); font-size: .92rem; background: var(--paper); resize: vertical;
}
.lkpd-check-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.lkpd-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; padding-top: 20px; border-top: 1px dashed var(--line-strong); }
.save-note { font-size: .8rem; color: var(--ink-faint); margin-top: 8px; }
.save-note.show-saved { color: var(--teal-deep); font-weight: 700; }

/* ---------- Guru / Rubric ---------- */
.guru-gate { text-align: center; padding: 40px 20px; background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius-lg); }
.guru-gate-form { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; align-items: center; }
.guru-gate-input { padding: 10px 14px; border: 1px solid var(--line-strong); border-radius: var(--radius-md, 8px); font-size: 0.95rem; min-width: 220px; text-align: center; letter-spacing: 2px; }
.guru-gate-input:focus { outline: 2px solid var(--accent, #2563eb); outline-offset: 1px; }
.guru-gate-error { margin-top: 14px; color: #dc2626; font-size: 0.9rem; font-weight: 600; }
.guru-content { display: none; }
.guru-content.show { display: block; }
.rubric-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .86rem; }
.rubric-table th, .rubric-table td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.rubric-table th { background: var(--navy); color: #fff; font-weight: 700; }
.rubric-table tr:nth-child(even) td { background: var(--paper); }
.key-list { padding-left: 20px; color: var(--ink-soft); }
.key-list li { margin-bottom: 6px; font-family: var(--font-mono); font-size: .88rem; }

/* ---------- Footer ---------- */
.footer { padding: 46px 0 60px; text-align: center; color: var(--ink-faint); font-size: .86rem; }
.footer strong { color: var(--navy); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .concept-grid, .summary-grid { grid-template-columns: 1fr; }
  .calc-grid { grid-template-columns: repeat(2, 1fr); }
  .lkpd-fields { grid-template-columns: 1fr 1fr; }
  .group-grid { grid-template-columns: 1fr; }
  .group-grid.lkpd-identity { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .calc-grid { grid-template-columns: 1fr 1fr; }
  .lkpd-fields, .lkpd-fields.two { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 34px); }
  .rubric-table { font-size: .76rem; }
  .rubric-table th, .rubric-table td { padding: 7px 8px; }
}

/* ---------- Print sheet (LKPD answer sheet, screen: hidden) ---------- */
#print-sheet { display: none; }

/* ---------- Print ---------- */
@media print {
  .nav, .progress-bar, .mobile-panel, .hero-actions, #guru-gate-btn { display: none !important; }
  body { background: #fff; }
  .section { padding: 10px 0; }
  a[href]::after { content: ""; }

  /* When printing a single LKPD answer sheet, hide every other element on the
     page (materi, kalkulator, latihan soal, navigasi, dst.) and show only the
     generated #print-sheet content. */
  body.printing-lkpd > *:not(#print-sheet) { display: none !important; }
  body.printing-lkpd #print-sheet {
    display: block !important;
    font-family: "Manrope", Arial, sans-serif;
    color: #111;
    padding: 0;
    margin: 0;
  }

  .print-page { max-width: 100%; }
  .print-page h1 {
    font-family: "Fraunces", Georgia, serif;
    font-size: 1.25rem;
    margin: 0 0 2px;
  }
  .print-page h2 {
    font-size: 1.05rem;
    margin: 0 0 16px;
    font-weight: 700;
  }
  .print-identity { margin-bottom: 18px; }
  .print-identity div { font-size: .95rem; margin-bottom: 6px; display: flex; gap: 6px; }
  .print-identity strong { min-width: 110px; display: inline-block; }
  .print-identity .print-blank-line { flex: 1; border-bottom: 1px dotted #000; min-width: 160px; }

  .print-jawaban-label {
    font-weight: 800;
    text-decoration: underline;
    margin: 6px 0 12px;
    font-size: 1rem;
  }
  .print-step { margin-bottom: 14px; page-break-inside: avoid; }
  .print-step h4 { font-size: .95rem; margin: 0 0 6px; font-weight: 700; }
  .print-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding-left: 22px;
    margin-bottom: 6px;
    font-size: .92rem;
  }
  .print-item-label { min-width: 230px; }
  .print-sep { flex: none; }
  .print-item-value { flex: 1; }
  .print-blank { display: inline-block; width: 100%; border-bottom: 1px dotted #000; min-height: 1.1em; }
  .print-conclusion { margin-top: 18px; page-break-inside: avoid; }
  .print-conclusion h4 { font-size: .95rem; margin: 0 0 8px; font-weight: 700; }
  .print-conclusion-text { font-size: .92rem; white-space: pre-wrap; }
  .print-conclusion-line { border-bottom: 1px dotted #000; height: 1.4em; margin-bottom: 4px; }
  .print-footer-note { margin-top: 26px; font-size: .78rem; color: #555; }
}