/* =========================================
   PORTOFOLIO — TEMA BUKU CATATAN HIJAU
   Satu file: variabel, layout, komponen, animasi, responsive
========================================= */

/* ---------- ROOT VARIABLES ---------- */
:root {
  /* hijau notebook */
  --green-900: #173625;
  --green-800: #1F4A33;
  --green-700: #2B5F43;
  --green-600: #35774F;
  --green-500: #3F8F5F;
  --green-200: #CFE5D5;
  --green-100: #E6F2E8;

  --cover: linear-gradient(160deg, #2E6446 0%, #1F4A33 55%, #173625 100%);
  --cover-text: #EAF4EC;
  --cover-muted: #A9C9B3;

  --paper: #FBF8EC;
  --paper-edge: #E4DDC3;
  --paper-edge-2: #D2C9A8;
  --rule: rgba(63, 143, 95, 0.17);
  --margin-line: rgba(214, 112, 112, 0.5);

  --card: #FFFDF5;
  --text-main: #213328;
  --text-muted: #5E7266;
  --accent: var(--green-600);
  --accent-strong: var(--green-800);
  --border-color: #D9DEC8;
  --shadow-color: rgba(23, 54, 37, 0.14);
  --desk: #D8E4D2;
  --desk-2: #C6D8C0;
  --highlight: rgba(255, 221, 87, 0.55);
  --tape: rgba(240, 214, 120, 0.8);
  --danger: #C23B3B;
  --ok: #2E8B57;

  --font-heading: 'Caveat', 'Segoe Print', cursive;
  --font-body: 'Nunito', system-ui, sans-serif;

  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --sidebar-w: 268px;
  --flip: 0.7s;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --page-pad-top: 30px;
  --page-pad-right: 52px;
  --page-pad-bottom: 22px;
  --page-pad-left: 84px;
  --margin-x: 62px;
}

[data-theme="dark"] {
  --paper: #1C2A22;
  --paper-edge: #14201A;
  --paper-edge-2: #0F1813;
  --rule: rgba(160, 210, 175, 0.09);
  --margin-line: rgba(220, 130, 130, 0.35);

  --card: #22332A;
  --text-main: #E8F1E9;
  --text-muted: #9DB5A4;
  --accent: #6FC48F;
  --accent-strong: #8FD6A8;
  --border-color: #34493C;
  --shadow-color: rgba(0, 0, 0, 0.45);
  --desk: #0F1A14;
  --desk-2: #0B130F;
  --highlight: rgba(255, 214, 80, 0.22);
  --tape: rgba(210, 185, 100, 0.45);
  --green-100: #1F3328;
  --green-200: #2D4A39;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
  min-height: 100%;
  height: 100dvh;
  overflow: hidden;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-main);
  background:
    radial-gradient(circle at 20% 10%, var(--desk) 0%, var(--desk-2) 100%);
  transition: background var(--transition), color var(--transition);
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.1; }

/* ---------- UTIL ---------- */
.highlight {
  background-image: linear-gradient(transparent 58%, var(--highlight) 58%, var(--highlight) 92%, transparent 92%);
  padding: 0 .12em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.tape {
  position: absolute;
  width: 84px; height: 26px;
  background: var(--tape);
  box-shadow: 0 1px 2px rgba(0,0,0,.12);
  z-index: 3;
  left: 50%;
  transform: translateX(-50%) rotate(-3deg);
  -webkit-mask: repeating-linear-gradient(90deg, #000 0 6px, transparent 6px 7px) ;
}
.tape--top { top: -12px; }

/* =========================================
   SIDEBAR (pengganti navbar)
========================================= */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 22px 18px 18px;
  color: var(--cover-text);
  background: var(--cover);
  box-shadow: 6px 0 30px rgba(0, 0, 0, 0.28);
  transform: translateX(-102%);
  transition: transform .45s cubic-bezier(.2,.8,.2,1);
  overflow-y: auto;
}
/* jahitan sampul */
.sidebar::before {
  content: '';
  position: absolute;
  inset: 10px;
  border: 2px dashed rgba(234, 244, 236, 0.2);
  border-radius: 14px;
  pointer-events: none;
}
/* karet pengikat buku */
.sidebar::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; right: 22px;
  width: 8px;
  background: linear-gradient(90deg, rgba(0,0,0,.18), rgba(0,0,0,.05) 40%, rgba(255,255,255,.06));
  pointer-events: none;
}

body.sidebar-open .sidebar { transform: translateX(0); }

.sidebar__top {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 4px 20px;
  z-index: 1;
}

.sidebar__logo {
  flex: none;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--green-900);
  background: #F4EFD8;
  border-radius: 12px;
  box-shadow: 0 3px 0 rgba(0,0,0,.25);
  transform: rotate(-4deg);
}

.sidebar__brand { display: flex; flex-direction: column; min-width: 0; line-height: 1.2; }
.sidebar__brand strong { font-family: var(--font-heading); font-size: 1.45rem; font-weight: 700; }
.sidebar__brand span { font-size: .78rem; color: var(--cover-muted); }

.icon-btn {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  transition: background var(--transition), transform var(--transition);
}

.sidebar__close { margin-left: auto; color: var(--cover-text); }
.sidebar__close:hover { background: rgba(255,255,255,.12); }

.sidebar__nav {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 14px;
  border-radius: 12px;
  font-weight: 600;
  color: var(--cover-muted);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.nav-link__no {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  min-width: 26px;
  opacity: .75;
}
.nav-link__label { font-size: 1rem; }

.nav-link:hover { background: rgba(255,255,255,.09); color: var(--cover-text); transform: translateX(3px); }

.nav-link.active {
  background: #F4EFD8;
  color: var(--green-900);
  box-shadow: 0 3px 0 rgba(0,0,0,.22);
}
.nav-link.active .nav-link__no { opacity: 1; }
/* pita pembatas buku */
.nav-link.active::after {
  content: '';
  position: absolute;
  right: 14px; top: -3px;
  width: 12px; height: 24px;
  background: #D96C5F;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 75%, 0 100%);
}

.sidebar__bottom {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 600;
  font-size: .92rem;
  color: var(--cover-text);
  border: 1.5px dashed rgba(234,244,236,.35);
  transition: background var(--transition), border-color var(--transition);
}
.theme-toggle:hover { background: rgba(255,255,255,.1); border-color: rgba(234,244,236,.6); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

.sidebar__copy { font-size: .78rem; color: var(--cover-muted); text-align: center; }

/* tombol buka sidebar (muncul saat sidebar tertutup) */
.sidebar-opener {
  position: fixed;
  top: 18px; left: 18px;
  z-index: 900;
  width: 46px; height: 46px;
  color: #EAF4EC;
  background: var(--cover);
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,.28), inset 0 0 0 2px rgba(234,244,236,.18);
  opacity: 0;
  visibility: hidden;
  transform: scale(.85);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
body:not(.sidebar-open) .sidebar-opener { opacity: 1; visibility: visible; transform: scale(1); }
.sidebar-opener:hover { transform: scale(1.06); }

.backdrop {
  position: fixed; inset: 0;
  z-index: 950;
  background: rgba(10, 25, 17, .5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

/* =========================================
   LAYOUT UTAMA + BUKU
========================================= */
.main {
  height: 100dvh;
  padding: 22px 28px 22px calc(var(--sidebar-w) + 28px);
  display: flex;
  justify-content: center;
  align-items: stretch;
  transition: padding-left .45s cubic-bezier(.2,.8,.2,1);
}
body:not(.sidebar-open) .main { padding-left: 84px; }

.book {
  position: relative;
  width: 100%;
  max-width: 1080px;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border-radius: 6px 18px 18px 6px;
  /* tumpukan kertas di sisi kanan & bawah */
  box-shadow:
    1px 1px 0 var(--paper-edge),
    3px 3px 0 var(--paper),
    4px 4px 0 var(--paper-edge-2),
    6px 6px 0 var(--paper),
    7px 7px 0 var(--paper-edge-2),
    0 28px 50px var(--shadow-color);
  transition: background var(--transition), box-shadow var(--transition);
}

/* lubang & ring spiral di tepi kiri */
.book__binding {
  position: absolute;
  top: 0; bottom: 0; left: -16px;
  width: 44px;
  z-index: 6;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='44' height='38' viewBox='0 0 44 38'><circle cx='30' cy='19' r='6.5' fill='%23142A1D' opacity='.85'/><defs><linearGradient id='g' x1='0' y1='0' x2='0' y2='1'><stop offset='0' stop-color='%23F2F5F3'/><stop offset='.5' stop-color='%23A8B5AD'/><stop offset='1' stop-color='%237E8C84'/></linearGradient></defs><rect x='3' y='16' width='32' height='6' rx='3' fill='url(%23g)'/><rect x='3' y='16' width='32' height='6' rx='3' fill='none' stroke='%23000' stroke-opacity='.18'/></svg>");
  background-repeat: repeat-y;
  background-size: 44px 38px;
  background-position: 0 14px;
}

.book__stack {
  position: relative;
  flex: 1;
  min-height: 0;
  perspective: 2200px;
  perspective-origin: 0% 50%;
  overflow: hidden;
  border-radius: 6px 18px 0 0;
}

/* =========================================
   HALAMAN
========================================= */
.page {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--green-200) transparent;
  background-color: var(--paper);
  background-image:
    linear-gradient(90deg, transparent var(--margin-x), var(--margin-line) var(--margin-x), var(--margin-line) calc(var(--margin-x) + 2px), transparent calc(var(--margin-x) + 2px)),
    repeating-linear-gradient(to bottom, transparent 0, transparent 31px, var(--rule) 31px, var(--rule) 32px);
  background-attachment: local;
  transform-origin: left center;
  backface-visibility: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 0;
}
.page::-webkit-scrollbar { width: 8px; }
.page::-webkit-scrollbar-thumb { background: var(--green-200); border-radius: 8px; }

.page.is-active { opacity: 1; visibility: visible; pointer-events: auto; z-index: 2; }

.page__body {
  min-height: 100%;
  padding: var(--page-pad-top) var(--page-pad-right) var(--page-pad-bottom) var(--page-pad-left);
}
.page__body--center {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
/* geser konten About, Skills, Contact sedikit ke bawah (tanpa scroll) */
@media (min-width: 901px) {
  #about .page__body,
  #skills .page__body,
  #contact .page__body {
    padding-top: calc(var(--page-pad-top) + 60px);
    padding-bottom: 0;
  }
}

/* ---- animasi balik halaman ---- */
.page.leave-next {
  visibility: visible; opacity: 1; z-index: 4;
  animation: flipOut var(--flip) cubic-bezier(.5,.05,.3,1) forwards;
}
.page.enter-next { animation: settleIn var(--flip) ease both; z-index: 1; }

.page.enter-prev {
  z-index: 4;
  animation: flipIn var(--flip) cubic-bezier(.5,.05,.3,1) both;
}
.page.leave-prev {
  visibility: visible; opacity: 1; z-index: 1;
  animation: settleOut var(--flip) ease forwards;
}

@keyframes flipOut {
  0%   { transform: rotateY(0deg); box-shadow: none; opacity: 1; }
  70%  { opacity: 1; }
  100% { transform: rotateY(-105deg); opacity: 0; }
}
@keyframes flipIn {
  0%   { transform: rotateY(-105deg); opacity: 0; }
  30%  { opacity: 1; }
  100% { transform: rotateY(0deg); opacity: 1; }
}
@keyframes settleIn {
  from { transform: translateX(22px) scale(.985); opacity: .4; }
  to   { transform: none; opacity: 1; }
}
@keyframes settleOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* bayangan lipatan saat halaman dibalik */
.book__stack::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.22), transparent 45%);
}
.book.is-flipping .book__stack::after { animation: foldShadow var(--flip) ease; }
@keyframes foldShadow {
  0%, 100% { opacity: 0; }
  45% { opacity: 1; }
}

/* ---- konten muncul bertahap saat halaman aktif ---- */
.page.is-active .rise {
  animation: rise .6s cubic-bezier(.16,1,.3,1) both;
  animation-delay: calc(var(--i, 0) * 70ms + 260ms);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* =========================================
   TIPOGRAFI
========================================= */
.section-eyebrow {
  font-family: var(--font-heading);
  color: var(--accent);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: .02em;
  margin-bottom: 2px;
}

.section-title {
  font-size: clamp(2.2rem, 4.4vw, 3.1rem);
  margin-bottom: 20px;
}

/* =========================================
   BUTTONS
========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: .95rem;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
.btn--primary {
  background: var(--green-600);
  color: #fff;
  box-shadow: 0 4px 0 var(--green-900);
}
.btn--primary:hover { background: var(--green-500); transform: translateY(-2px); box-shadow: 0 6px 0 var(--green-900); }
.btn--primary:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--green-900); }

[data-theme="dark"] .btn--primary { background: #4BA872; box-shadow: 0 4px 0 #1D4430; color: #0E1D15; }
[data-theme="dark"] .btn--primary:hover { background: #63BE88; }

.btn--outline {
  color: var(--text-main);
  border-color: var(--accent);
  background: transparent;
  box-shadow: 0 4px 0 color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn--outline:hover { background: var(--green-100); transform: translateY(-2px); }
.btn--outline:active { transform: translateY(2px); }

.btn--sm { padding: 8px 16px; font-size: .84rem; box-shadow: 0 3px 0 rgba(0,0,0,.12); }
.btn--sm.btn--primary { box-shadow: 0 3px 0 var(--green-900); }
.btn--full { width: 100%; }
.btn:disabled { opacity: .6; cursor: progress; }

/* =========================================
   HOME
========================================= */
.hero { text-align: center; max-width: 720px; position: relative; z-index: 2; }

.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 8px;
  transform: rotate(-2deg);
}
.hero__title { font-size: clamp(2.8rem, 7vw, 5rem); margin-bottom: 14px; }
.hero__subtitle {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: var(--text-muted);
  min-height: 3.3em;
  margin: 0 auto 10px;
  max-width: 560px;
  font-weight: 600;
}
.cursor { animation: blink 1s infinite; color: var(--accent); }
@keyframes blink { 0%, 50% { opacity: 1; } 51%, 100% { opacity: 0; } }

.hero__desc { color: var(--text-muted); max-width: 600px; margin: 0 auto 30px; }
.hero__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero__hint { margin-top: 34px; font-family: var(--font-heading); font-size: 1.2rem; color: var(--text-muted); opacity: .8; }

.doodle { position: absolute; color: var(--accent); opacity: .55; pointer-events: none; }
.doodle--star { width: 54px; top: 8%; right: 10%; transform: rotate(14deg); }
.doodle--squiggle { width: 130px; bottom: 9%; left: 4%; transform: rotate(-6deg); }

/* =========================================
   ABOUT
========================================= */
.about__grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: center;
}

.polaroid {
  position: relative;
  background: #fff;
  padding: 12px 12px 8px;
  border-radius: 6px;
  box-shadow: 0 14px 30px var(--shadow-color);
  transform: rotate(-3deg);
  transition: transform .4s ease;
}
[data-theme="dark"] .polaroid { background: #EFEBD8; }
.polaroid:hover { transform: rotate(0deg) scale(1.02); }
.polaroid__caption { font-family: var(--font-heading); font-size: 1.5rem; text-align: center; color: #2A3A30; margin-top: 4px; line-height: 1.3; }

.avatar-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1/1;
  overflow: hidden;
  background: var(--green-100);
  border-radius: 3px;
}
.avatar-frame img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.avatar-fallback {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-family: var(--font-heading);
  font-size: 5rem;
  font-weight: 700;
  color: var(--green-600);
}
.avatar-frame.has-image .avatar-fallback { display: none; }
.avatar-frame.no-image img { display: none; }

.about__text h3 { font-size: 2rem; margin-bottom: 12px; }
.about__text p { color: var(--text-muted); margin-bottom: 14px; }

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 26px;
}
.stat-card {
  background: #FFF4B8;
  color: #3A3416;
  border-radius: 4px 4px 14px 4px;
  padding: 16px 12px 14px;
  text-align: center;
  box-shadow: 0 6px 14px var(--shadow-color);
  transition: transform var(--transition);
}
.stat-card:nth-child(1) { transform: rotate(-2deg); }
.stat-card:nth-child(2) { transform: rotate(1.5deg); background: #CFEBD2; }
.stat-card:nth-child(3) { transform: rotate(-1deg); background: #FFE0CF; }
.stat-card:hover { transform: rotate(0) translateY(-4px); }
[data-theme="dark"] .stat-card { color: #2B2A12; }
.stat-number { display: block; font-family: var(--font-heading); font-size: 2.8rem; font-weight: 700; line-height: 1; }
.stat-label { font-size: .82rem; font-weight: 700; }

/* =========================================
   SKILLS
========================================= */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.skill-category {
  background: var(--card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px 16px 16px;
}
.skill-category__title {
  font-size: 1.6rem;
  line-height: 1;
  margin-bottom: 12px;
  color: var(--accent-strong);
}
.skill-cards { display: flex; flex-wrap: wrap; gap: 10px; }

/* kotak logo selalu terang agar logo asli (mis. GitHub) tetap terlihat di mode malam */
.skill-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 80px; height: 86px;
  background: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 4px;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.skill-card:hover {
  transform: translateY(-4px) rotate(-2deg);
  border-color: var(--accent);
  box-shadow: 0 10px 18px var(--shadow-color);
}
.skill-card__logo { width: 36px; height: 36px; object-fit: contain; flex-shrink: 0; }
.skill-card__name { font-weight: 800; font-size: .7rem; line-height: 1.1; color: #2A3A30; }

/* =========================================
   PROJECTS
========================================= */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px 22px;
  padding-top: 8px;
}
.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 10px 22px var(--shadow-color);
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:nth-child(odd)  { transform: rotate(-1deg); }
.project-card:nth-child(even) { transform: rotate(1deg); }
.project-card:hover { transform: rotate(0) translateY(-6px); box-shadow: 0 20px 34px var(--shadow-color); }

.project-card__image { margin: 12px 12px 0; overflow: hidden; aspect-ratio: 16/9; background: var(--green-100); border-radius: 3px; }
.project-card__image img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform .5s ease; }
.project-card:hover .project-card__image img { transform: scale(1.06); }

.project-card__body { padding: 10px 16px 16px; display: flex; flex-direction: column; flex: 1; }
.project-card__title { font-size: 1.55rem; margin-bottom: 4px; }
.project-card__desc { color: var(--text-muted); font-size: .86rem; line-height: 1.5; margin-bottom: 10px; }

.project-card__badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.badge {
  font-size: .72rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--green-100);
  color: var(--accent-strong);
  border: 1.5px solid var(--green-200);
}
.project-card__links { display: flex; gap: 10px; margin-top: auto; }

/* =========================================
   EDUCATION
========================================= */
.page__body--edu { display: flex; flex-direction: column; }

.edu-card {
  position: relative;
  flex: 1;
  max-height: 440px;
  margin-top: 6px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: center;
  background: var(--card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 44px;
  box-shadow: 0 14px 30px var(--shadow-color);
}
.edu-card__side { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.edu-card__icon {
  width: 128px; height: 128px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--green-600);
  color: #fff;
  box-shadow: 0 6px 0 var(--green-900);
  transform: rotate(-4deg);
}
.edu-card__years {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-strong);
}
.edu-card__dash { font-size: 1.8rem; color: var(--accent); }

.edu-card__status {
  display: inline-block;
  font-weight: 800;
  font-size: .8rem;
  padding: 4px 14px;
  border-radius: 20px;
  background: #FFF4B8;
  color: #3A3416;
  transform: rotate(-2deg);
  margin-bottom: 10px;
}
.edu-card__school { font-size: clamp(2.4rem, 4.2vw, 3.4rem); margin-bottom: 6px; }
.edu-card__major { font-size: 1.2rem; font-weight: 800; color: var(--accent); margin-bottom: 14px; }
.edu-card__desc { font-size: 1.08rem; color: var(--text-muted); margin-bottom: 18px; max-width: 560px; }
.edu-card__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.edu-card__tags .badge { font-size: .82rem; padding: 5px 14px; }

/* =========================================
   CONTACT
========================================= */
.contact__grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: start; }
.contact__intro > p:not(.section-eyebrow):not(.contact__signoff) { color: var(--text-muted); margin-bottom: 24px; }
.contact__socials { display: flex; gap: 10px; flex-wrap: wrap; }
.social-link {
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
  background: var(--card);
  font-size: .9rem;
  font-weight: 700;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}
.social-link:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px) rotate(-1.5deg); }
.contact__signoff { margin-top: 34px; font-family: var(--font-heading); font-size: 1.4rem; line-height: 1.3; color: var(--text-muted); }

.contact__form {
  background: var(--card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 24px 18px;
}
.form-group { margin-bottom: 8px; }
.form-group label { display: block; font-size: .86rem; font-weight: 800; margin-bottom: 4px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 0;
  border-bottom: 2px solid var(--border-color);
  border-radius: 8px 8px 0 0;
  background: color-mix(in srgb, var(--green-100) 55%, transparent);
  color: var(--text-main);
  font-family: inherit;
  font-size: .94rem;
  transition: border-color var(--transition), background var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-bottom-color: var(--accent);
  background: var(--green-100);
}
.form-group textarea { resize: none; min-height: 92px; }
.form-error { display: block; color: var(--danger); font-size: .76rem; margin-top: 2px; min-height: .9em; line-height: 1.2; }
.form-group input.invalid, .form-group textarea.invalid { border-bottom-color: var(--danger); }
.form-success { font-size: .88rem; margin-top: 8px; font-weight: 700; text-align: center; min-height: 1.1em; }
.form-success.is-ok { color: var(--ok); }
.form-success.is-error { color: var(--danger); }
.form-success.is-info { color: var(--text-muted); }

/* =========================================
   PAGER (pembalik halaman)
========================================= */
.pager {
  position: relative;
  z-index: 7;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px 14px 60px;
  border-top: 2px dashed var(--border-color);
  background: var(--paper);
  border-radius: 0 0 18px 6px;
}

.pager__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 800;
  font-size: .9rem;
  color: var(--accent-strong);
  border: 2px solid var(--green-200);
  background: var(--card);
  transition: background var(--transition), transform var(--transition), opacity var(--transition), border-color var(--transition);
}
.pager__btn:hover:not(:disabled) { background: var(--green-100); border-color: var(--accent); transform: translateY(-2px); }
.pager__btn:disabled { opacity: .35; cursor: default; }

.pager__center { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.pager__dots { display: flex; gap: 8px; }
.pager__dot {
  width: 11px; height: 11px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: transparent;
  transition: background var(--transition), transform var(--transition);
}
.pager__dot:hover { transform: scale(1.25); }
.pager__dot.active { background: var(--accent); transform: scale(1.2); }
.pager__count { font-family: var(--font-heading); font-size: 1.15rem; color: var(--text-muted); line-height: 1; }

/* =========================================
   FOCUS (Accessibility)
========================================= */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.sidebar a:focus-visible, .sidebar button:focus-visible, .sidebar-opener:focus-visible { outline-color: #F4EFD8; }

/* =========================================
   RESPONSIVE
========================================= */
@media (max-width: 1100px) {
  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .about__grid { grid-template-columns: 220px 1fr; gap: 32px; }
}

/* tablet & mobile: sidebar jadi overlay */
@media (max-width: 900px) {
  :root {
    --page-pad-top: 36px;
    --page-pad-right: 26px;
    --page-pad-bottom: 28px;
    --page-pad-left: 64px;
    --margin-x: 46px;
  }

  .main,
  body:not(.sidebar-open) .main { padding: 74px 14px 14px 22px; }

  body.sidebar-open .backdrop { opacity: 1; visibility: visible; }

  .sidebar-opener { top: 14px; left: 14px; }

  .book__binding { left: -12px; }
  .pager { padding-left: 46px; }

  .about__grid { grid-template-columns: 1fr; gap: 28px; }
  .about__avatar { max-width: 220px; margin: 0 auto; }
  .contact__grid { grid-template-columns: 1fr; gap: 30px; }
  .edu-card { grid-template-columns: 1fr; max-height: none; gap: 24px; padding: 28px 24px; }
  .edu-card__side { flex-direction: row; justify-content: flex-start; gap: 22px; }
  .edu-card__icon { width: 88px; height: 88px; }
  .edu-card__icon svg { width: 44px; height: 44px; }
  .edu-card__years { font-size: 2rem; }
}

@media (max-width: 640px) {
  :root {
    --page-pad-right: 18px;
    --page-pad-left: 52px;
    --margin-x: 38px;
  }

  .main,
  body:not(.sidebar-open) .main { padding: 68px 10px 10px 18px; }

  .skills__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; gap: 34px; }
  .about__stats { grid-template-columns: 1fr; }
  .stat-card { transform: none !important; }

  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__hint { font-size: 1.05rem; }
  .doodle--star { display: none; }
  .doodle--squiggle { width: 90px; }

  .pager { padding: 10px 12px 12px 40px; gap: 6px; }
  .pager__btn span { display: none; }
  .pager__btn { padding: 9px 12px; }
  .pager__dot { width: 9px; height: 9px; }

  .book__binding { left: -10px; width: 36px; background-size: 36px 31px; }
}

@media (max-width: 380px) {
  .hero__title { font-size: 2.4rem; }
  .pager__dots { gap: 5px; }
}

/* tinggi layar pendek (laptop kecil / landscape) */
@media (max-height: 640px) {
  .hero__hint { display: none; }
  .hero__desc { margin-bottom: 20px; }
}

/* layar desktop yang pendek: padatkan agar halaman muat tanpa scroll */
@media (min-width: 901px) and (max-height: 760px) {
  :root { --page-pad-top: 24px; --page-pad-bottom: 16px; }
  .section-title { font-size: 2.3rem; margin-bottom: 14px; }
  .section-eyebrow { font-size: 1.2rem; }
  .projects__grid { gap: 18px; }
  .project-card__image { aspect-ratio: 2/1; }
  .project-card__desc { font-size: .82rem; }
  .skills__grid { gap: 14px; }
  .skill-category { padding: 10px 14px 12px; }
  .skill-card { height: 78px; }
  .form-group textarea { min-height: 70px; }
  .contact__signoff { margin-top: 20px; }
  .edu-card { padding: 24px 36px; }
  .hero__title { font-size: 3.8rem; }
  .hero__hint { display: none; }
  .hero__desc { margin-bottom: 22px; }
  .hero__subtitle { min-height: 2.8em; }
  
  #about .page__body,
  #skills .page__body,
  #contact .page__body {
    padding-top: calc(var(--page-pad-top) + 50px);
  }
}
/* mode HP: tombol sidebar di kiri atas buku, konten tidak terlalu turun */
@media (max-width: 900px) {
  :root { --page-pad-top: 56px; }

  .main,
  body:not(.sidebar-open) .main { padding: 14px 14px 14px 22px; }

  .sidebar-opener {
    position: absolute;
    top: 8px;
    left: var(--page-pad-left);
    right: auto;
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  /* perbaikan kartu pendidikan */
  .edu-card { grid-template-columns: minmax(0, 1fr); flex: none; }
  .edu-card__main { min-width: 0; }
  .edu-card__side { flex-wrap: wrap; gap: 14px 18px; }
}

@media (max-width: 640px) {
  .edu-card { padding: 22px 16px; gap: 18px; }
  .edu-card__icon { width: 64px; height: 64px; }
  .edu-card__icon svg { width: 32px; height: 32px; }
  .edu-card__years { font-size: 1.6rem; gap: 6px; }
  .edu-card__school { font-size: 2rem; }
  .edu-card__major { font-size: 1.05rem; }
  .edu-card__desc { font-size: .95rem; }
}

/* =========================================
   REDUCED MOTION
========================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0ms !important; transition-duration: .01ms !important; }
  .cursor { animation: none; }
}