/* =========================================================================
   app.css — satu berkas gaya untuk seluruh aplikasi.

   Arah rancangan: perpustakaan, bukan dasbor. Kertas hangat, tinta tua,
   huruf berkait untuk judul, garis tipis alih-alih kotak bergaris tebal,
   dan warna aksen yang hanya muncul sedikit-sedikit per novel.
   ========================================================================= */

/* ---- token warna -------------------------------------------------------- */

:root {
  color-scheme: light;

  --paper:        #f6f3ec;
  --paper-2:      #fffdf8;
  --ink:          #1b1815;
  --ink-soft:     #55504a;
  --ink-faint:    #8c857c;
  --line:         rgba(27, 24, 21, 0.12);
  --line-soft:    rgba(27, 24, 21, 0.07);
  --accent:       #8a6a2f;
  --shadow-sm:    0 1px 2px rgba(27, 24, 21, 0.05), 0 6px 16px rgba(27, 24, 21, 0.05);
  --shadow-lg:    0 2px 4px rgba(27, 24, 21, 0.06), 0 18px 40px rgba(27, 24, 21, 0.10);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, ui-serif, serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius:    14px;
  --radius-sm: 9px;

  --bar-h: 56px;
}

[data-theme="dark"] {
  color-scheme: dark;

  --paper:     #12110f;
  --paper-2:   #1b1917;
  --ink:       #ece6da;
  --ink-soft:  #a9a196;
  --ink-faint: #7c756b;
  --line:      rgba(236, 230, 218, 0.14);
  --line-soft: rgba(236, 230, 218, 0.08);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 44px rgba(0, 0, 0, 0.5);
}

/* ---- dasar -------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

button,
input { font: inherit; color: inherit; }

::selection { background: color-mix(in srgb, var(--accent) 28%, transparent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---- tombol ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .62rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .01em;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}

.btn--ghost:hover { background: var(--line-soft); }

.btn--primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn--primary:hover { transform: translateY(-1px); }
.btn--primary:active { transform: translateY(0); }

.btn--full { width: 100%; padding: .8rem 1rem; }

.iconbtn {
  display: inline-grid;
  place-items: center;
  width: 38px; height: 38px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .18s ease, color .18s ease;
}

.iconbtn:hover { background: var(--line-soft); color: var(--ink); }
.iconbtn svg { width: 19px; height: 19px; }

/* Matahari untuk pindah ke terang, bulan untuk pindah ke gelap. */
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* =========================================================================
   Halaman masuk
   ========================================================================= */

.page-login {
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: 2rem 1.25rem;
  /* Sapuan cahaya yang sangat halus, bukan gradasi mencolok. */
  background:
    radial-gradient(70% 55% at 50% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 70%),
    var(--paper);
}

.login {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login__mark {
  display: inline-grid;
  place-items: center;
  width: 46px; height: 46px;
  margin-bottom: 1.4rem;
  color: var(--accent);
}

.login__mark svg { width: 100%; height: 100%; }

.login__title {
  margin: 0 0 .4rem;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 6vw, 2.3rem);
  font-weight: 500;
  letter-spacing: -.015em;
}

.login__sub {
  margin: 0 0 2rem;
  color: var(--ink-soft);
  font-size: .92rem;
  text-wrap: balance;
}

.login__form { text-align: left; }

.field { display: block; margin-bottom: 1rem; }

.field__label {
  display: block;
  margin-bottom: .4rem;
  color: var(--ink-soft);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.field__input {
  width: 100%;
  padding: .78rem .9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-2);
  transition: border-color .18s ease, box-shadow .18s ease;
}

.field__input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.login__error {
  margin: -.3rem 0 1rem;
  color: #b4452f;
  font-size: .86rem;
}

[data-theme="dark"] .login__error { color: #e08b76; }

/* =========================================================================
   Rak buku
   ========================================================================= */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1120px;
  margin: 0 auto;
  padding: .75rem clamp(1.1rem, 4vw, 2rem);
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.06rem;
  letter-spacing: .01em;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: .4rem;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 3.6rem) clamp(1.1rem, 4vw, 2rem) 5rem;
}

.intro { margin-bottom: clamp(1.8rem, 4vw, 2.6rem); }

.intro__title {
  margin: 0 0 .3rem;
  font-family: var(--serif);
  font-size: clamp(2.1rem, 7vw, 3rem);
  font-weight: 500;
  letter-spacing: -.022em;
  line-height: 1.1;
}

.intro__meta {
  margin: 0;
  color: var(--ink-faint);
  font-size: .88rem;
}

/* ---- kartu "lanjutkan" -------------------------------------------------- */

.resume {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
  padding: 1.3rem clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper-2);
  box-shadow: var(--shadow-sm);
}

.resume__eyebrow {
  margin: 0 0 .25rem;
  color: var(--accent);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.resume__title {
  margin: 0 0 .2rem;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: -.01em;
}

.resume__meta {
  margin: 0;
  color: var(--ink-soft);
  font-size: .86rem;
  font-variant-numeric: tabular-nums;
}

/* ---- grid kartu --------------------------------------------------------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-radius: var(--radius);
  transition: transform .22s cubic-bezier(.2, .7, .3, 1);
}

.card__link:hover { transform: translateY(-4px); }

/* Sampul dibentuk dari huruf, bukan gambar: nomor jilid, garis, lalu judul.
   Rasio 3:4 seperti buku, dengan garis tipis di tepi dalam sebagai bingkai. */
.cover {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  aspect-ratio: 3 / 4;
  padding: 1.1rem;
  border-radius: var(--radius);
  background:
    linear-gradient(160deg,
      color-mix(in srgb, var(--accent) 20%, var(--paper-2)),
      color-mix(in srgb, var(--accent) 8%, var(--paper-2)));
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* Punggung buku di tepi kiri. */
.cover::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: color-mix(in srgb, var(--accent) 70%, var(--ink));
  opacity: .85;
}

.cover::after {
  content: "";
  position: absolute;
  inset: .5rem .5rem .5rem 1rem;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 8px;
  pointer-events: none;
}

.card__link:hover .cover { box-shadow: var(--shadow-lg); }

.cover__number {
  position: relative;
  margin-left: .35rem;
  color: color-mix(in srgb, var(--accent) 85%, var(--ink));
  font-family: var(--serif);
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.cover__rule {
  position: absolute;
  left: 1.45rem;
  right: 1.4rem;
  top: 3.4rem;
  height: 1px;
  background: color-mix(in srgb, var(--accent) 35%, transparent);
}

.cover__title {
  position: relative;
  margin-left: .35rem;
  color: color-mix(in srgb, var(--ink) 88%, var(--accent));
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.25;
  letter-spacing: -.01em;
  text-wrap: balance;
}

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: .85rem .2rem 0;
}

.card__title {
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.3;
  letter-spacing: -.01em;
}

.card__original {
  margin-top: .1rem;
  color: var(--ink-faint);
  font-size: .8rem;
  font-style: italic;
}

.card__author {
  margin-top: .2rem;
  color: var(--ink-soft);
  font-size: .82rem;
}

.card__foot { margin-top: auto; padding-top: .8rem; }

.bar {
  display: block;
  height: 3px;
  margin-bottom: .45rem;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
}

.badge {
  display: block;
  color: var(--ink-soft);
  font-size: .78rem;
  font-variant-numeric: tabular-nums;
}

.badge--muted { color: var(--ink-faint); }

/* =========================================================================
   Halaman baca
   ========================================================================= */

.page-reader {
  overflow: hidden;
  overscroll-behavior: none;
}

.reader {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100svh;
}

/* ---- bilah atas --------------------------------------------------------- */

.readerbar {
  position: relative;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem clamp(.6rem, 2vw, 1rem);
  border-bottom: 1px solid var(--line-soft);
  background: var(--paper);
}

.readerbar__title {
  flex: 1;
  min-width: 0;
  padding: 0 .2rem;
}

.readerbar__book,
.readerbar__author {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.readerbar__book {
  font-family: var(--serif);
  font-size: .98rem;
  line-height: 1.25;
}

.readerbar__author {
  color: var(--ink-faint);
  font-size: .76rem;
}

.readerbar__actions { display: flex; gap: .15rem; }

/* Garis rambut kemajuan baca, menempel di bawah bilah atas. */
.readerbar__progress {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
}

.readerbar__progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width .25s ease;
}

/* ---- panggung halaman --------------------------------------------------- */

.stage {
  position: relative;
  overflow: auto;
  display: grid;
  place-items: start center;
  padding: clamp(.7rem, 2.5vw, 1.6rem);
  background: color-mix(in srgb, var(--ink) 4%, var(--paper));
  -webkit-overflow-scrolling: touch;
}

.pagecanvas {
  display: block;
  max-width: 100%;
  border-radius: 3px;
  background: #fff;
  box-shadow: var(--shadow-lg);
}

/* Di tema gelap halaman kertas ikut diredupkan, supaya tidak menyilaukan
   saat membaca di ruang gelap. Warna gambar dijaga lewat hue-rotate. */
[data-theme="dark"] .pagecanvas {
  filter: invert(1) hue-rotate(180deg) brightness(.92) contrast(1.06);
  box-shadow: none;
}

.stage__status {
  display: flex;
  align-items: center;
  gap: .6rem;
  align-self: center;
  color: var(--ink-soft);
  font-size: .9rem;
  text-align: center;
}

.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Ketuk tepi kiri/kanan untuk pindah halaman. Sengaja tanpa tampilan apa pun. */
.tapzone {
  position: absolute;
  top: 0; bottom: 0;
  width: 14%;
  max-width: 120px;
  border: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.tapzone--prev { left: 0; }
.tapzone--next { right: 0; }

/* ---- bilah halaman ------------------------------------------------------ */

.pagerbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  padding: .5rem 1rem calc(.5rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
}

.pagerbtn {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background .18s ease, opacity .18s ease;
}

.pagerbtn:hover:not(:disabled) { background: var(--line-soft); }
.pagerbtn:disabled { opacity: .3; cursor: default; }
.pagerbtn svg { width: 18px; height: 18px; }

.pagerform {
  display: flex;
  align-items: baseline;
  gap: .35rem;
  color: var(--ink-soft);
  font-size: .9rem;
  font-variant-numeric: tabular-nums;
}

.pagerform__input {
  width: 3.6rem;
  padding: .3rem .4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.pagerform__input:focus {
  outline: none;
  border-color: var(--accent);
}

.pagerform__total { white-space: nowrap; }

/* ---- pesan sekilas ------------------------------------------------------ */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--bar-h) + 1.2rem + env(safe-area-inset-bottom));
  z-index: 30;
  margin: 0;
  padding: .55rem 1rem;
  transform: translateX(-50%);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: .82rem;
  box-shadow: var(--shadow-lg);
}

/* ---- layar kecil -------------------------------------------------------- */

@media (max-width: 560px) {
  .grid { grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }

  .cover { padding: .85rem; }
  .cover__number { font-size: 1.2rem; }
  .cover__title { font-size: .88rem; }
  .cover__rule { top: 2.9rem; left: 1.2rem; right: 1.1rem; }

  .card__title { font-size: .92rem; }
  .card__original { display: none; }

  .resume { align-items: flex-start; flex-direction: column; }
  .resume .btn { width: 100%; }

  .readerbar__author { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}