/* ==========================================================================
   Kampung Inggris Pro — Design System
   1 tema seragam di semua halaman (lihat BRIEF-v2-FINAL.md)
   ========================================================================== */

:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F5F3;
  --color-text: #3A3A3A;
  --color-heading: #1B2A4A;
  --color-green: #4C7A50;
  --color-green-dark: #3B5F3E;
  --color-amber: #D98E2B;
  --color-amber-dark: #B8741C;
  --color-border: #E3E3E1;
  --color-white: #FFFFFF;

  --font-heading: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  --container-w: 1120px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 24px rgba(27, 42, 74, 0.08);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.2;
  margin: 0 0 var(--space-2);
  font-weight: 700;
}
h1 { font-size: clamp(2.2rem, 4vw, 3.4rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 var(--space-2); }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

section { padding: var(--space-6) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-header { max-width: 640px; margin: 0 0 var(--space-4); }
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--color-amber-dark);
  background: rgba(217, 142, 43, 0.12);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--color-amber); color: var(--color-white); box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--color-amber-dark); }
.btn-amber { background: var(--color-amber); color: var(--color-white); box-shadow: var(--shadow); }
.btn-amber:hover { background: var(--color-amber-dark); }
.btn-outline { background: transparent; border-color: var(--color-heading); color: var(--color-heading); }
.btn-outline:hover { background: var(--color-heading); color: var(--color-white); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ---- Navbar ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 14px 0;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-img { height: 44px; width: 44px; border-radius: 50%; object-fit: cover; }
.logo-fallback {
  display: none;
  align-items: center;
  justify-content: center;
  height: 44px;
  width: 44px;
  border-radius: 50%;
  background: var(--color-amber);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
}
.logo-name {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-heading);
  font-size: 1.05rem;
}
.nav-menu { display: flex; align-items: center; gap: var(--space-3); flex: 1; justify-content: center; }
.nav-menu a { font-weight: 600; color: var(--color-heading); font-size: 0.95rem; }
.nav-menu a:hover { color: var(--color-amber-dark); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--color-heading);
}
.site-header--simple .nav-inner { justify-content: space-between; }

@media (max-width: 860px) {
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-2) var(--space-3);
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
}

@media (max-width: 420px) {
  .logo-name { display: none; }
  .btn { white-space: normal; text-align: center; }
}

/* ---- Footer ---- */
.site-footer { background: var(--color-heading); color: #DCE3EE; padding: var(--space-5) 0 var(--space-2); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-4); padding-bottom: var(--space-4); }
.footer-logo { height: 40px; width: 40px; border-radius: 50%; margin-bottom: var(--space-2); }
.footer-brand p { color: #AEB9CC; max-width: 320px; }
.social-icons { display: flex; gap: var(--space-2); margin-top: var(--space-2); }
.social-icons a { font-weight: 600; color: var(--color-amber); }
.social-icons a:hover { color: var(--color-white); }
.footer-col h4 { color: var(--color-white); font-family: var(--font-body); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-2); }
.footer-col a { display: block; color: #AEB9CC; margin-bottom: 10px; }
.footer-col a:hover { color: var(--color-white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: var(--space-2); font-size: 0.85rem; color: #8B96AC; text-align: center; }
.site-footer--simple { padding: var(--space-3) 0; }
.site-footer--simple .footer-bottom { border-top: none; padding-top: 0; }

@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---- Cards ---- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow);
}
.card-grid { display: grid; gap: var(--space-3); }
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 4px 10px;
  border-radius: 999px;
}
.badge-basic { background: rgba(76,122,80,0.15); color: var(--color-green-dark); }
.badge-intermediate { background: rgba(217,142,43,0.18); color: var(--color-amber-dark); }
.badge-advanced { background: rgba(27,42,74,0.12); color: var(--color-heading); }
.badge-placeholder { background: rgba(74,66,56,0.12); color: var(--color-text); }
.badge-popular { background: rgba(27,42,74,0.12); color: var(--color-heading); }

/* ---- Hero / Reel frame ---- */
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-5); align-items: center; padding-top: var(--space-6); }
.reel-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 9 / 16;
  margin: 0 auto;
  border-radius: 28px;
  border: 6px solid var(--color-heading);
  background: linear-gradient(160deg, #ECECE9, #D9D9D5);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.reel-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, rgba(74,66,56,0.05) 0 2px, transparent 2px 14px);
}
.reel-caption {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 14px;
  background: rgba(27,42,74,0.85);
  color: var(--color-white);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}
.reel-placeholder-label {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 0.7rem;
  background: var(--color-amber);
  color: white;
  padding: 3px 9px;
  border-radius: 999px;
  font-weight: 700;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
}

/* ---- Marquee ---- */
.marquee-wrap {
  overflow: hidden;
  background: var(--color-heading);
  padding: 14px 0;
}
.marquee-track {
  display: flex;
  gap: 3rem;
  white-space: nowrap;
  width: max-content;
  animation: marquee 26s linear infinite;
}
.marquee-track span {
  color: var(--color-amber);
  font-family: var(--font-heading);
  font-size: 1.2rem;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---- Video showcase ---- */
.video-showcase {
  aspect-ratio: 16/9;
  max-width: 720px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--color-border);
  color: var(--color-text);
  text-align: center;
  padding: var(--space-3);
}
.video-showcase iframe { width: 100%; height: 100%; border: 0; }

/* ---- FAQ ---- */
.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--space-2) 0; }
.faq-item summary { font-weight: 700; color: var(--color-heading); cursor: pointer; list-style: none; display: flex; justify-content: space-between; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; color: var(--color-amber-dark); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: var(--space-2); }

/* ---- Comparison table ---- */
.compare-table { width: 100%; border-collapse: collapse; background: var(--color-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare-table th, .compare-table td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--color-border); }
.compare-table th { background: var(--color-bg-alt); font-family: var(--font-heading); color: var(--color-heading); }

/* ---- Forms ---- */
.field { margin-bottom: var(--space-2); }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.9rem; }
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  font-family: inherit;
  font-size: 1rem;
}
.field input:focus, .field textarea:focus { outline: 2px solid var(--color-amber); }

/* ---- Quiz ---- */
.quiz-box { max-width: 640px; margin: 0 auto; }
.progress-bar { height: 8px; border-radius: 999px; background: var(--color-bg-alt); overflow: hidden; margin-bottom: var(--space-4); }
.progress-bar-fill { height: 100%; background: var(--color-amber); transition: width 0.3s ease; }
.quiz-question { text-align: center; }
.quiz-options { display: grid; gap: 12px; margin-top: var(--space-3); }
.quiz-option {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.quiz-option:hover { border-color: var(--color-amber); background: rgba(217,142,43,0.06); }
.quiz-result { text-align: center; }
.quiz-result .badge { font-size: 0.9rem; padding: 8px 18px; margin-bottom: var(--space-2); }
.quiz-actions { display: flex; gap: var(--space-2); justify-content: center; margin-top: var(--space-4); flex-wrap: wrap; }

/* ---- Chat Mr. Pro ---- */
.chat-box { max-width: 560px; margin: 0 auto; background: var(--color-white); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--color-border); overflow: hidden; }
.chat-header { background: var(--color-heading); color: var(--color-white); padding: 16px 20px; display: flex; justify-content: space-between; align-items: center; }
.chat-progress { font-size: 0.8rem; color: #AEB9CC; }
.chat-messages { padding: 20px; display: flex; flex-direction: column; gap: 12px; max-height: 420px; overflow-y: auto; }
.chat-msg { max-width: 80%; padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.95rem; }
.chat-msg.mrpro { background: var(--color-bg-alt); align-self: flex-start; }
.chat-msg.user { background: var(--color-amber); color: var(--color-white); align-self: flex-end; }
.chat-input-row { display: flex; gap: 8px; padding: 14px; border-top: 1px solid var(--color-border); }
.chat-input-row input { flex: 1; padding: 10px 14px; border-radius: 999px; border: 1px solid var(--color-border); }
.chat-limit-msg { padding: var(--space-3); text-align: center; color: var(--color-text); background: var(--color-bg-alt); border-radius: var(--radius-sm); }

/* ---- Placeholder helper (dev only, remove-ready markers) ---- */
.todo-box {
  border: 2px dashed var(--color-amber);
  background: rgba(217,142,43,0.08);
  color: var(--color-amber-dark);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---- Book shelf (Beranda preview) ---- */
.book-shelf-wrap { max-width: 900px; margin: 0 auto; }
.book-shelf { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; padding: 0 8px 18px; }
.book-spine {
  width: 118px;
  min-height: 150px;
  border-radius: 8px 8px 3px 3px;
  padding: 14px 12px 10px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--color-white);
  box-shadow: var(--shadow);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.82rem;
  line-height: 1.25;
  position: relative;
  transition: transform 0.15s ease;
}
.book-spine:hover { transform: translateY(-6px); }
.spine-level {
  position: absolute;
  top: 10px;
  left: 12px;
  font-family: var(--font-body);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  opacity: 0.85;
}
.spine-basic { background: linear-gradient(160deg, var(--color-green), var(--color-green-dark)); }
.spine-intermediate { background: linear-gradient(160deg, var(--color-amber), var(--color-amber-dark)); }
.spine-advanced { background: linear-gradient(160deg, var(--color-heading), #101c33); }
.shelf-board {
  height: 16px;
  border-radius: 4px;
  background: linear-gradient(180deg, #C9A876, #A9834F);
  box-shadow: 0 10px 18px rgba(27,42,74,0.18);
}

/* ---- Ebook preview modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(27, 42, 74, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
  z-index: 200;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: var(--color-bg);
  max-width: 620px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  border-radius: var(--radius);
  padding: var(--space-4);
  position: relative;
  box-shadow: var(--shadow);
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--color-heading);
}
.modal-unit-list { list-style: decimal; padding-left: 22px; margin: 12px 0 var(--space-3); }
.modal-unit-list li { margin-bottom: 6px; }
.modal-phrase-list { list-style: none; padding: 0; margin: 12px 0; }
.modal-phrase-list li { padding: 8px 0; border-bottom: 1px solid var(--color-border); }
.modal-dialog { background: var(--color-bg-alt); border-radius: var(--radius-sm); padding: 14px; margin: 12px 0; }
.modal-dialog p { margin: 0 0 6px; }
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}
.card-title-link { cursor: pointer; }
.card-title-link:hover { color: var(--color-amber-dark); }

/* ---- Utility ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.text-center { text-align: center; }
@media (max-width: 760px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}