/* ==========================================================
   LAYOUT — preloader, map (folder), tab, lembar (sheet)
   ========================================================== */

/* ---------- Preloader ---------- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: grid;
  place-items: center;
  background: var(--c-about);
}

.preloader::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--noise);
  opacity: 0.18;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.preloader__word {
  display: flex;
  align-items: baseline;
  gap: 1px;
  font-size: 22px;
  line-height: 1;
}

.preloader__word span {
  display: inline-block;
  min-width: 0.5em;
  text-align: center;
  will-change: transform;
}

/* ---------- App + folder ---------- */
.app {
  position: fixed;
  inset: 0;
  z-index: 1;
  /* diganti JS menjadi bintang yang membesar saat intro */
  clip-path: var(--reveal, none);
  background: var(--void);
}

.folder {
  position: absolute;
  top: var(--gap);
  bottom: var(--gap);
  left: 50%;
  width: var(--folder-w);
  transform: translateX(calc(-50% - var(--tab-w) / 2));
}

/* ---------- Tabs (kanan, vertikal) ---------- */
/* Tab pembatas map berbentuk trapesium: tepi atas & bawah miring ke arah
   luar, sudut luar membulat — seperti referensi. Bentuknya dari lapisan
   ::before yang diputar sedikit dengan perspektif; ::after menumpuk tekstur
   noise yang sama dengan lembar, jadi tab dan lembar terlihat satu kertas. */
.tabs {
  --tab-overlap: 10px; /* tab saling tumpang 10px */
  position: absolute;
  top: 10px;
  left: calc(100% - 1px);
  display: flex;
  flex-direction: column;
  z-index: 0;
}

.tab {
  --tab-c: var(--c-about);
  position: relative;
  display: grid;
  place-items: center;
  width: var(--tab-w);
  height: var(--tab-h);
  padding-right: 4px;
  font-family: var(--f-mono);
  /* teks mengecil bersama tinggi tab supaya tidak keluar dari badan tab */
  font-size: clamp(9px, calc(var(--tab-h) / 10), 12px);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink);
  transform-origin: left center;
  transition: transform 0.45s var(--ease-out);
}

.tab + .tab {
  margin-top: calc(-1 * var(--tab-overlap));
}

/* tab di atas menimpa ujung tab di bawahnya */
.tab:nth-child(1) { z-index: 6; }
.tab:nth-child(2) { z-index: 5; }
.tab:nth-child(3) { z-index: 4; }
.tab:nth-child(4) { z-index: 3; }
.tab:nth-child(5) { z-index: 2; }
.tab:nth-child(6) { z-index: 1; }

.tab::before,
.tab::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 0 10px 10px 0;
  transform: perspective(60px) rotateY(11deg);
  transform-origin: left center;
  pointer-events: none;
}

/* warna kertas tab = warna lembarnya; tab yang tidak aktif sedikit
   berbayang di pangkalnya, seolah terselip di balik lembar */
.tab::before {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.16), rgba(0, 0, 0, 0) 9px),
    var(--tab-c);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.35);
  /* bayangan tipis jatuh ke tab di bawahnya — tumpukan terlihat alami */
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.2));
}

/* noise kertas — sama persis dengan lapisan noise di lembar */
.tab::after {
  background-image: var(--noise);
  opacity: 0.22;
  mix-blend-mode: multiply;
}

.tab span {
  position: relative;
  z-index: 1;
  writing-mode: vertical-rl;
  white-space: nowrap;
}

/* Hover: tab sedikit membesar dari pangkalnya (tetap menempel ke lembar) */
.tab:hover {
  z-index: 9;
  transform: scale(1.07);
}

/* tab aktif menyatu dengan lembar: tanpa bayangan pangkal, di atas lembar */
.tab.is-active {
  z-index: 10;
}

.tab.is-active::before {
  background: var(--tab-c);
  box-shadow: none;
}

.tab[data-tab="about"] { --tab-c: var(--c-about); }
.tab[data-tab="works"] { --tab-c: var(--c-works); }
.tab[data-tab="github"] { --tab-c: var(--c-github); }
.tab[data-tab="tools"] { --tab-c: var(--c-tools); }
.tab[data-tab="experience"] { --tab-c: var(--c-education); }
.tab[data-tab="contact"] { --tab-c: var(--c-contact); }

/* ---------- Sheets ---------- */
.sheets {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.sheet {
  --sheet-c: var(--c-about);
  position: absolute;
  inset: 0;
  background: var(--sheet-c);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
  transform-origin: 50% 0%;
}

.sheet[hidden] {
  display: block;
  visibility: hidden;
  pointer-events: none;
}

.sheet::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--noise);
  opacity: 0.22;
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 5;
}

.sheet[data-page="about"] { --sheet-c: var(--c-about); }
.sheet[data-page="works"] { --sheet-c: var(--c-works); }
.sheet[data-page="github"] { --sheet-c: var(--c-github); }
.sheet[data-page="tools"] { --sheet-c: var(--c-tools); }
.sheet[data-page="experience"] { --sheet-c: var(--c-education); }
.sheet[data-page="contact"] { --sheet-c: var(--c-contact); }

.sheet__scroll {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 18px 20px 28px;
  background-image: var(--cross);
  background-size: 120px 120px;
  background-position: -60px -60px;
  background-attachment: local;
}

.sheet__scroll > * {
  position: relative;
  z-index: 1;
}

/* Kata latar bergaya timbul (emboss) */
.sheet__scroll > .watermark {
  position: absolute;
  z-index: 0;
  /* tengah-bawah di semua halaman */
  left: 50%;
  bottom: -0.2em;
  font-family: var(--f-script);
  font-size: clamp(120px, 24vw, 230px);
  line-height: 1;
  color: var(--sheet-c);
  text-shadow:
    -1px -1px 0 rgba(255, 255, 255, 0.55),
    1px 1px 1px rgba(0, 0, 0, 0.14);
  transform: translateX(-50%) rotate(-6deg);
  transform-origin: 50% 100%;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

/* ---------- Doodle "my works" ---------- */
.doodle {
  position: absolute;
  /* sejajar dengan tab WORKS (tab ke-2) */
  top: calc(var(--gap) + 10px + var(--tab-h) * 1.5 - 10px - 30px);
  left: calc(50% + var(--folder-w) / 2 + 14px);
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--f-hand);
  font-size: 32px;
  line-height: 0.78;
  color: #f2f2f2;
  transform: rotate(-6deg);
  transform-origin: 0 50%;
  transition: transform 0.4s var(--ease-out);
}

.doodle:hover {
  transform: rotate(-6deg) translateX(-4px);
}

/* goyang pelan terus-menerus, seperti coretan yang hidup — memakai properti
   rotate/translate terpisah supaya tidak bentrok dengan transform di atas */
.doodle {
  animation: doodle-wiggle 2.6s ease-in-out infinite;
}

@keyframes doodle-wiggle {
  0%,
  100% {
    rotate: -2deg;
    translate: 0 0;
  }
  25% {
    rotate: 2.5deg;
    translate: -2px -1px;
  }
  50% {
    rotate: -1deg;
    translate: -4px 1px;
  }
  75% {
    rotate: 3deg;
    translate: -1px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .doodle {
    animation: none !important;
  }
}

.doodle__arrow {
  width: 78px;
  height: 39px;
  margin-top: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Pill pojok kanan bawah ---------- */
.pill {
  position: absolute;
  right: 16px;
  bottom: 16px;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--c-about);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  transition: transform 0.3s var(--ease-out);
}

.pill:hover {
  transform: translateY(-2px);
}

/* ==========================================================
   RESPONSIVE — tab pindah ke atas di layar sempit
   ========================================================== */
@media (max-width: 1100px) {
  .doodle,
  .pill {
    display: none;
  }
}

@media (max-width: 900px) {
  :root {
    --gap: 12px;
    --folder-w: calc(100vw - 2 * var(--gap));
  }

  /* Navbar mobile: tab map di ATAS lembar, rata kanan, ABOUT paling kanan —
     seperti pembatas map pada referensi. Ruang 30px di atas lembar untuk tab. */
  .folder {
    top: calc(var(--gap) + 30px);
    bottom: var(--gap);
    transform: translateX(-50%);
  }

  .tabs {
    top: auto;
    bottom: calc(100% - 1px);
    left: 8px;
    right: 6px;
    z-index: 3;
    flex-direction: row-reverse;
    justify-content: flex-start;
    align-items: flex-end;
  }

  .tab {
    width: auto;
    min-width: 0;
    height: 28px;
    flex: 0 1 auto;
    padding: 2px 13px 0;
    color: var(--ink);
    letter-spacing: 0.04em;
    font-size: 9.5px;
    font-weight: 500;
    transform-origin: 50% 100%;
    transition: transform 0.3s var(--ease-out);
  }

  /* tab saling tumpang sedikit, tab di kanan menimpa tetangga kirinya */
  .tab + .tab {
    margin: 0 -7px 0 0;
  }

  /* bentuk trapesium: sisi kiri-kanan miring, sudut atas membulat */
  .tab::before,
  .tab.is-active::before {
    inset: 0;
    border-radius: 7px 7px 0 0;
    background:
      linear-gradient(0deg, rgba(0, 0, 0, 0.16), rgba(0, 0, 0, 0) 7px),
      var(--tab-c);
    -webkit-mask: none;
    mask: none;
    /* garis tipis di atas + bayangan tipis jatuh ke tab di sebelah kirinya */
    filter: drop-shadow(0 -1px 0 rgba(0, 0, 0, 0.18)) drop-shadow(-2px 0 2px rgba(0, 0, 0, 0.18));
    transform: perspective(36px) rotateX(14deg);
    transform-origin: 50% 100%;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
  }

  /* noise ikut bentuk trapesium tab mobile */
  .tab::after {
    border-radius: 7px 7px 0 0;
    transform: perspective(36px) rotateX(14deg);
    transform-origin: 50% 100%;
  }

  /* tab aktif menyatu dengan lembar: tanpa bayangan dasar, sedikit lebih tinggi */
  .tab.is-active {
    z-index: 10;
    height: 30px;
  }

  .tab.is-active::before {
    background: var(--tab-c);
  }

  .tab span {
    writing-mode: horizontal-tb;
  }

  .tab:hover {
    transform: scale(1.05);
  }
}

/* Label pendek untuk tab yang namanya panjang (ponsel) */
.tab__short {
  display: none;
}

@media (max-width: 520px) {
  .tab__long {
    display: none;
  }

  .tab__short {
    display: inline;
  }
}

/* ---------- Status awal sebelum intro (dihapus oleh JS) ---------- */
.is-loading .app {
  --reveal: polygon(50% 50%, 50% 50%, 50% 50%);
}

.is-loading .tab,
.is-loading .doodle,
.is-loading .pill {
  opacity: 0;
}

/* ---------- Tombol musik latar ---------- */
.music-toggle {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(227, 232, 234, 0.92);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.3s var(--ease-out), background 0.3s;
}

.music-toggle:hover {
  transform: translateY(-2px);
}

.music-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.music-bars i {
  width: 2px;
  height: 3px;
  border-radius: 1px;
  background: currentColor;
  transition: height 0.3s;
}

/* bar equalizer bergoyang saat musik diputar */
.music-toggle[aria-pressed="true"] .music-bars i {
  animation: eq 0.9s ease-in-out infinite alternate;
}

.music-toggle[aria-pressed="true"] .music-bars i:nth-child(2) { animation-delay: -0.3s; }
.music-toggle[aria-pressed="true"] .music-bars i:nth-child(3) { animation-delay: -0.6s; }
.music-toggle[aria-pressed="true"] .music-bars i:nth-child(4) { animation-delay: -0.15s; }

@keyframes eq {
  from { height: 3px; }
  to { height: 12px; }
}

.is-loading .music-toggle {
  opacity: 0;
}

/* layar sedang: ruang di kiri map sempit → tombol ikon saja */
@media (max-width: 1100px) {
  .music-toggle {
    left: 8px;
    padding: 8px 9px;
  }

  .music-label {
    display: none;
  }
}

/* HP: tombol bulat kecil di pojok kiri atas, sejajar baris tab */
@media (max-width: 900px) {
  .music-toggle {
    left: var(--gap);
    top: 8px;
    bottom: auto;
    padding: 6px 9px;
    box-shadow: none;
  }

  .music-label {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .music-toggle .music-bars i {
    animation: none !important;
  }
}