/* ============================================================
   Handbook PMBM SIFA — Reset, base & layout
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img { max-width: 100%; height: auto; display: block; }
svg { flex: none; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: var(--lh-heading);
  color: var(--color-primary-dark);
  letter-spacing: -0.015em;
  margin: 0 0 var(--sp-3);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); font-weight: 800; }
h2 { font-size: var(--fs-h2); font-weight: 700; }
h3 { font-size: var(--fs-h3); font-weight: 700; }

p { margin: 0 0 var(--sp-4); max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

a { color: var(--color-primary); text-underline-offset: 3px; }
a:hover { color: var(--color-primary-dark); }

ul, ol { margin: 0 0 var(--sp-4); padding-left: 1.35em; }
li { margin-bottom: var(--sp-2); }
li:last-child { margin-bottom: 0; }

strong { font-weight: 700; color: var(--color-text); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* Hanya tampil saat dicetak (lihat print.css) */
.print-only { display: none; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed;
  top: -100px; left: var(--sp-3);
  z-index: 200;
  background: var(--color-primary-dark);
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: var(--r-md);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--tr-fast);
}
.skip-link:focus { top: var(--sp-3); color: #fff; }

/* ---------- Reading progress ---------- */
.reading-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 90;
  background: transparent;
  pointer-events: none;
}
.reading-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 90ms linear;
}

/* ---------- Site header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0 clamp(0.85rem, 3vw, 1.75rem);
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-primary-dark);
  min-width: 0;
}
.brand__mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  display: grid;
  place-items: center;
  flex: none;
  overflow: hidden;
}
.brand__mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand__text { display: grid; line-height: 1.15; min-width: 0; }
.brand__name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}
.brand__sub {
  font-size: 0.68rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header__spacer { flex: 1 1 auto; }

.header__actions { display: flex; align-items: center; gap: 0.4rem; }

.icon-btn {
  appearance: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.7rem;
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font: inherit;
  font-size: var(--fs-small);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--tr-fast), border-color var(--tr-fast), color var(--tr-fast);
}
.icon-btn:hover { background: var(--color-primary-softer); border-color: var(--color-border-strong); }
.icon-btn__label { display: none; }

@media (min-width: 560px) {
  .icon-btn__label { display: inline; }
}

/* ---------- Shell ---------- */
.shell {
  display: block;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 clamp(0.85rem, 3vw, 1.75rem);
}

/* ---------- Sidebar / drawer ---------- */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: min(86vw, 320px);
  z-index: 110;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--sp-4) var(--sp-4) var(--sp-7);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform var(--tr-base), visibility var(--tr-base);
}
.sidebar.is-open { transform: translateX(0); visibility: visible; }

.sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.sidebar__title {
  font-family: var(--font-heading);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 700;
  margin: 0;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(11, 52, 40, 0.42);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--tr-base), visibility var(--tr-base);
}
.nav-overlay.is-open { opacity: 1; visibility: visible; }

.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-list li { margin: 0 0 2px; }

.nav-link {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.68rem 0.7rem;
  border-radius: var(--r-md);
  text-decoration: none;
  color: var(--color-text-soft);
  font-size: var(--fs-small);
  line-height: 1.4;
  min-height: 44px;
  transition: background var(--tr-fast), color var(--tr-fast);
}
.nav-link:hover { background: var(--color-primary-softer); color: var(--color-primary-dark); }
.nav-link__num {
  font-family: var(--font-heading);
  font-size: var(--fs-caption);
  font-weight: 700;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}
.nav-link__text { font-weight: 600; }
.nav-link[aria-current="page"] {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--sh-1);
}
.nav-link[aria-current="page"] .nav-link__num { color: rgba(255, 255, 255, 0.72); }

.sidebar__divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--sp-4) 0;
  border: 0;
}

.sidebar__foot { font-size: var(--fs-caption); color: var(--color-muted); }
.sidebar__foot p { margin-bottom: var(--sp-2); }

/* ---------- Desktop layout ---------- */
@media (min-width: 1024px) {
  .nav-toggle { display: none; }

  .shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 3rem);
    align-items: start;
  }

  .sidebar {
    position: sticky;
    top: var(--header-h);
    inset: auto;
    width: auto;
    max-height: calc(100vh - var(--header-h));
    transform: none;
    visibility: visible;
    background: transparent;
    border-right: 1px solid var(--color-border);
    padding: var(--sp-6) var(--sp-4) var(--sp-6) 0;
  }
  .sidebar__close { display: none; }
  .nav-overlay { display: none; }
}

/* ---------- Main ---------- */
.main { padding: var(--sp-5) 0 var(--sp-8); min-width: 0; }

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  align-items: start;
}

@media (min-width: 1240px) {
  .page-grid { grid-template-columns: minmax(0, 1fr) 210px; gap: var(--sp-6); }
  .page-grid > .page-body { order: 1; }
  .page-grid > .toc {
    order: 2;
    position: sticky;
    top: calc(var(--header-h) + var(--sp-5));
    margin-bottom: 0;
  }
}

.section { margin: 0 0 var(--sp-7); scroll-margin-top: calc(var(--header-h) + 1rem); }
.section:last-child { margin-bottom: 0; }
.section > h2 { margin-bottom: var(--sp-4); }

.stack > * + * { margin-top: var(--sp-4); }
.stack-lg > * + * { margin-top: var(--sp-5); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-primary-dark);
  color: #E4EEE8;
  padding: var(--sp-7) 0 var(--sp-6);
  margin-top: var(--sp-8);
}
.site-footer a { color: #F0E3CB; }
.site-footer__inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 clamp(0.85rem, 3vw, 1.75rem);
  display: grid;
  gap: var(--sp-5);
}
@media (min-width: 760px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr; gap: var(--sp-6); }
}
.site-footer h2, .site-footer h3 { color: #fff; }
.site-footer__brand {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: #fff;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-2);
}
.site-footer__tag {
  color: #BBD4C7;
  font-size: var(--fs-small);
  max-width: 34ch;
}
.site-footer__title {
  font-family: var(--font-heading);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: #9FC0B0;
  margin: 0 0 var(--sp-3);
  font-weight: 700;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; font-size: var(--fs-small); }
.site-footer li { margin-bottom: var(--sp-2); }
.site-footer__legal {
  max-width: var(--page-max);
  margin: var(--sp-6) auto 0;
  padding: var(--sp-4) clamp(0.85rem, 3vw, 1.75rem) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: var(--fs-caption);
  color: #9FC0B0;
}