/* =========================================================
   Rantai Kata - style.css
   Mobile-first, 320px aman, tanpa dependensi & tanpa web font.
   Palet hangat: krem, terracotta, hijau zaitun.
   ========================================================= */

:root {
  --bg:        #FDF6EC;
  --surface:   #FFFDF8;
  --ink:       #3D2B1F;
  --ink-soft:  #6B5544;
  --line:      #E6D5C0;

  --warm:      #C0603A;   /* terracotta - aksi utama */
  --warm-dark: #9C4A2A;
  --warm-soft: #FBEDE5;

  --olive:     #5F7343;   /* benar / sukses */
  --olive-soft:#EDF2E4;

  --alert:     #A8322B;   /* salah */
  --alert-soft:#FBE9E7;

  --gold:      #B9862F;   /* petunjuk */
  --gold-soft: #FBF1DC;

  --radius: 12px;
  --tap: 44px;
  --shadow: 0 1px 3px rgba(61, 43, 31, .10);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

/* ---------- utilitas ---------- */

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--warm);
  color: #fff;
  padding: 10px 14px;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ---------- header ---------- */

.app-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--warm);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}

.app-title {
  font-size: 1.125rem;
  margin: 0;
  flex: 1;
  text-align: center;
  letter-spacing: .5px;
}

.back-link {
  color: #fff;
  text-decoration: none;
  font-size: .875rem;
  min-height: var(--tap);
  min-width: var(--tap);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 0 8px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .16);
}
.back-link:hover { background: rgba(255, 255, 255, .28); }

.icon-btn {
  min-height: var(--tap);
  min-width: var(--tap);
  border: 0;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .16);
  color: #fff;
  font-size: 1.125rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { background: rgba(255, 255, 255, .28); }
.icon-btn[aria-pressed="true"] {
  background: #fff;
  color: var(--warm-dark);
}

/* ---------- layout ---------- */

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 12px 12px 32px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  margin-bottom: 14px;
}

.panel-title {
  font-size: .8125rem;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--ink-soft);
  margin: 0 0 12px;
  font-weight: 700;
}

.field { margin-bottom: 14px; }

.field-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink-soft);
}

/* ---------- chip tingkat ---------- */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  flex: 1 1 auto;
  min-width: 88px;
  min-height: var(--tap);
  padding: 6px 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: .875rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.2;
}
.chip small {
  font-size: .6875rem;
  color: var(--ink-soft);
}
.chip:hover { border-color: var(--warm); }

/* dipilih: warna + border tebal + tanda centang (warna bukan satu-satunya isyarat) */
.chip[aria-checked="true"] {
  background: var(--warm-soft);
  border-color: var(--warm);
  font-weight: 700;
}
.chip[aria-checked="true"]::after {
  content: "\2713";
  font-size: .75rem;
  color: var(--warm-dark);
}
.chip[aria-checked="true"] small { color: var(--warm-dark); }

/* ---------- select & input ---------- */

.select, .input {
  width: 100%;
  min-height: var(--tap);
  padding: 8px 10px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}

.input {
  text-transform: uppercase;
  letter-spacing: .18em;
  font-weight: 700;
  font-size: 1.0625rem;
}
.input::placeholder {
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
  color: #B6A492;
}

.select:focus-visible,
.input:focus-visible,
.btn:focus-visible,
.chip:focus-visible,
.icon-btn:focus-visible,
.back-link:focus-visible,
.skip-link:focus-visible {
  outline: 3px solid var(--warm-dark);
  outline-offset: 2px;
}

.input-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.input-row .input { flex: 1 1 auto; min-width: 0; }
.input-row .btn  { flex: 0 0 auto; }

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  flex: 1 1 auto;
  min-width: 84px;
  min-height: var(--tap);
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background: var(--warm);
  border-color: var(--warm);
  color: #fff;
}
.btn-primary:hover { background: var(--warm-dark); border-color: var(--warm-dark); }

.btn-ghost {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--warm); }

/* HAPUS dibuat menonjol - dia minta papan yang gampang dihapus */
.btn-undo {
  background: var(--gold-soft);
  border-color: var(--gold);
  color: #6E4E12;
  font-weight: 700;
}
.btn-undo:hover { background: #F6E4C2; }

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* ---------- tujuan ---------- */

.goal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 6px;
  background: var(--warm-soft);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.goal-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 0;
}

.goal-label {
  font-size: .6875rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-soft);
}

.goal-word {
  font-size: 1.25rem;
  letter-spacing: .12em;
  color: var(--warm-dark);
  word-break: break-all;
}

.goal-arrow {
  color: var(--ink-soft);
  font-size: 1.25rem;
  flex: 0 0 auto;
}

/* ---------- statistik ---------- */

.stats {
  display: flex;
  gap: 8px;
  margin: 0 0 4px;
}

.stat {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 4px;
}

.stat dt {
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--ink-soft);
}

.stat dd {
  margin: 2px 0 0;
  font-size: 1.125rem;
  font-weight: 700;
}

.stats-note {
  font-size: .75rem;
  color: var(--ink-soft);
  margin: 0 0 10px;
  text-align: center;
}

.turn {
  margin: 0 0 10px;
  font-size: .9375rem;
  font-weight: 600;
  text-align: center;
  padding: 6px;
  border-radius: var(--radius);
  background: var(--olive-soft);
  color: #3F4F2B;
}

/* ---------- rantai ---------- */

.chain {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 46vh;
  overflow-y: auto;
}

.chain-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  animation: pop .18s ease-out;
}

.chain-num {
  flex: 0 0 auto;
  min-width: 22px;
  font-size: .75rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.chain-word {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: .14em;
  word-break: break-all;
  min-width: 0;
}

/* huruf yang berubah: warna + garis bawah + tebal (bukan warna saja) */
.chain-word .chg {
  color: var(--warm-dark);
  border-bottom: 3px solid var(--warm);
  padding-bottom: 1px;
}

.chain-tag {
  margin-left: auto;
  flex: 0 0 auto;
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 2px 7px;
  border-radius: 99px;
  border: 1px solid;
}

.tag-start {
  background: var(--bg);
  border-color: var(--line);
  color: var(--ink-soft);
}
.tag-goal {
  background: var(--olive-soft);
  border-color: var(--olive);
  color: #3F4F2B;
  font-weight: 700;
}

.chain-item.is-start { border-left: 4px solid var(--ink-soft); }
.chain-item.is-goal  { border-left: 4px solid var(--olive); background: var(--olive-soft); }

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

.msg {
  margin: 10px 0;
  padding: 0;
  font-size: .9375rem;
  min-height: 1.4em;
}

.msg.show {
  padding: 9px 11px;
  border-radius: var(--radius);
  border-left: 4px solid;
}

/* tiap jenis pesan punya ikon teks -> warna bukan satu-satunya isyarat */
.msg-error {
  background: var(--alert-soft);
  border-color: var(--alert);
  color: #7E2420;
}
.msg-ok {
  background: var(--olive-soft);
  border-color: var(--olive);
  color: #3F4F2B;
}
.msg-hint {
  background: var(--gold-soft);
  border-color: var(--gold);
  color: #6E4E12;
}
.msg-win {
  background: var(--olive-soft);
  border-color: var(--olive);
  color: #3F4F2B;
  font-weight: 700;
}

.msg-icon {
  font-weight: 700;
  margin-right: 5px;
}

/* ---------- aturan ---------- */

.rules {
  margin: 0 0 10px;
  padding-left: 20px;
  font-size: .875rem;
  color: var(--ink-soft);
}
.rules li { margin-bottom: 5px; }
.rules strong { color: var(--ink); }

.rules-note {
  font-size: .8125rem;
  color: var(--ink-soft);
  background: var(--gold-soft);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius);
  padding: 9px 11px;
  margin: 0;
}

/* ---------- footer ---------- */

.app-footer {
  text-align: center;
  font-size: .8125rem;
  color: var(--ink-soft);
  padding: 0 12px 20px;
}
.app-footer p { margin: 0; }

/* ---------- animasi ---------- */

@keyframes pop {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: none; }
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  30%, 70% { transform: translateX(3px); }
  50%      { transform: translateX(-3px); }
}

.shake { animation: shake .3s ease-in-out; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- layar sangat sempit (320px) ---------- */

@media (max-width: 359px) {
  .app-title   { font-size: 1rem; }
  .goal-word   { font-size: 1.0625rem; }
  .chain-word  { font-size: .9375rem; letter-spacing: .1em; }
  .stat dd     { font-size: 1rem; }
  .btn         { min-width: 72px; padding: 10px 8px; font-size: .9375rem; }
  main         { padding: 10px 8px 28px; }
  .panel       { padding: 12px 10px; }
}

/* ---------- layar lebar ---------- */

@media (min-width: 600px) {
  .app-title { font-size: 1.25rem; }
  .goal-word { font-size: 1.5rem; }
}

/* =========================================================
   Generator: mode, biji, dan catatan kolam
   ========================================================= */

/* `#field-gen` lahir dengan atribut [hidden]. Aturan display apa pun di
   sini WAJIB dijaga [hidden], kalau tidak deklarasi penulis mengalahkan
   `[hidden] { display: none }` bawaan peramban - persis cacat yang
   membuat hangman tampil tertutup tirai. */
.field[hidden] { display: none !important; }

.field-label-gap { margin-top: 12px; }

.hint-note {
  font-size: .75rem;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 8px 0 0;
}

.hint-note #seed-echo {
  font-weight: 700;
  color: var(--warm-dark);
  font-variant-numeric: tabular-nums;
}

.pool-note {
  font-size: .75rem;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

/* Asal teka-teki di atas papan: kurasi atau hasil generate + bijinya. */
.origin {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: .8rem;
  color: var(--ink-soft);
}

.origin-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--warm-soft);
  color: var(--warm-dark);
  border: 1px solid var(--line);
  font-weight: 700;
  font-size: .75rem;
}

.origin-seed {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--ink);
}

/* Layar sempit: biji dan tombolnya menumpuk supaya tetap lega disentuh. */
@media (max-width: 380px) {
  .input-row { flex-wrap: wrap; }
  #field-gen .input-row .btn { width: 100%; }
}