/* お題ビンゴメーカー — レトロポップ紙ものトーン */
:root {
  --paper: #FFF6E9;
  --card: #FFFDF7;
  --ink: #33261F;
  --sub: #7A6A5F;
  --accent: #E8543F;   /* コーラル */
  --accent2: #2A9D8F;  /* ティール */
  --line: #E8D9C3;
  --mark: rgba(232, 84, 63, .82);
  --radius: 14px;
  --shadow: 0 1px 2px rgba(51,38,31,.06), 0 4px 12px rgba(51,38,31,.08), 0 12px 32px rgba(51,38,31,.06);
}
body[data-theme="sakura"] {
  --paper: #FFF0F4; --card: #FFFAFC; --ink: #4A2B36; --sub: #96707E;
  --accent: #E0568C; --accent2: #8C6BAE; --line: #F2CFDC; --mark: rgba(224,86,140,.8);
}
body[data-theme="night"] {
  --paper: #1D2233; --card: #262D42; --ink: #F2EFE6; --sub: #A8AEC4;
  --accent: #FFC94A; --accent2: #5BD6C3; --line: #3A4360; --mark: rgba(255,201,74,.8);
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.35);
}
body[data-theme="mono"] {
  --paper: #FAFAF8; --card: #FFFFFF; --ink: #1C1C1A; --sub: #6E6E68;
  --accent: #1C1C1A; --accent2: #4A4A45; --line: #DDDDD6; --mark: rgba(28,28,26,.75);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;
  background: var(--paper); color: var(--ink);
  line-height: 1.75; font-size: 16px;
  transition: background .25s, color .25s;
}
h1, h2, .logo, .bingo-title { font-family: "Mochiy Pop One", "Zen Maru Gothic", sans-serif; font-weight: 400; }
h1, h2 { text-wrap: balance; }
p, dd, li { text-wrap: pretty; }
a { color: var(--accent2); }

/* header */
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 40px); border-bottom: 2px dashed var(--line);
}
.logo { font-size: 1.15rem; color: var(--accent); text-decoration: none; letter-spacing: .02em; }
.site-nav a { margin-left: 16px; font-size: .92rem; color: var(--sub); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

main { max-width: 1080px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px) 56px; }

/* hero */
.hero { text-align: center; padding: 40px 0 28px; }
.hero h1 { font-size: clamp(1.5rem, 4.5vw, 2.3rem); color: var(--accent); margin-bottom: 12px; }
.lead { max-width: 640px; margin: 0 auto; color: var(--sub); font-size: .98rem; }

/* tool layout */
.tool { display: grid; grid-template-columns: minmax(280px, 380px) 1fr; gap: 22px; align-items: start; }
@media (max-width: 860px) { .tool { grid-template-columns: 1fr; } }

.panel {
  background: var(--card); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); border: 1px solid var(--line);
}
.panel-title { font-size: 1.02rem; color: var(--accent); margin-bottom: 14px; }

.field { display: block; margin-bottom: 14px; }
.field-label { display: block; font-size: .82rem; font-weight: 700; color: var(--sub); margin-bottom: 5px; }
.field-row { display: flex; gap: 14px; align-items: end; flex-wrap: wrap; }
.field-row .field { margin-bottom: 14px; }
.checkbox-field { display: flex; align-items: center; gap: 7px; font-size: .88rem; padding-bottom: 8px; cursor: pointer; }
.checkbox-field input { width: 17px; height: 17px; accent-color: var(--accent); }

input[type="text"], select, textarea {
  width: 100%; padding: 9px 12px; font: inherit; font-size: .95rem; color: var(--ink);
  background: var(--paper); border: 1.5px solid var(--line); border-radius: 9px; outline: none;
}
input[type="text"]:focus, select:focus, textarea:focus { border-color: var(--accent2); }
textarea { resize: vertical; line-height: 1.6; }

.theme-picker { display: flex; gap: 8px; flex-wrap: wrap; }
.theme-chip {
  font: inherit; font-size: .82rem; padding: 6px 13px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--line); background: var(--paper); color: var(--ink);
}
.theme-chip.is-active { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent); }
.theme-chip--pop { background: #FFF6E9; color: #E8543F; }
.theme-chip--sakura { background: #FFF0F4; color: #E0568C; }
.theme-chip--night { background: #1D2233; color: #FFC94A; }
.theme-chip--mono { background: #FFFFFF; color: #1C1C1A; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  font: inherit; font-size: .92rem; font-weight: 700; cursor: pointer;
  padding: 10px 18px; border-radius: 999px; border: 1.5px solid var(--accent);
  background: var(--accent); color: #fff;
  transition: transform .12s, filter .15s;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: scale(.97); }
.btn--ghost { background: transparent; color: var(--accent); }
.btn--primary { background: var(--accent2); border-color: var(--accent2); }
.btn--x { background: #1C1C1A; border-color: #1C1C1A; }
body[data-theme="night"] .btn--x { background: #000; border-color: #444; }
.hint { font-size: .8rem; color: var(--sub); margin-top: 10px; }

/* mode toggle */
.mode-toggle { display: flex; gap: 8px; margin-bottom: 14px; }
.mode-btn {
  flex: 1; font: inherit; font-size: .88rem; font-weight: 700; padding: 9px 6px;
  border-radius: 10px; border: 1.5px solid var(--line); background: var(--paper);
  color: var(--sub); cursor: pointer;
}
.mode-btn.is-active { border-color: var(--accent); color: var(--accent); background: var(--card); }

/* bingo card */
.card-wrap { display: flex; justify-content: center; }
.bingo-card {
  position: relative; width: 100%; max-width: 560px; background: var(--card);
  border: 2.5px solid var(--ink); border-radius: 16px; padding: 16px;
  box-shadow: var(--shadow);
}
.bingo-burst {
  position: absolute; inset: 0; z-index: 5; pointer-events: none;
  display: flex; align-items: center; justify-content: center;
  font-family: "Mochiy Pop One", "Zen Maru Gothic", sans-serif;
  font-size: clamp(2.2rem, 8vw, 3.6rem); color: var(--accent);
  text-shadow: 0 2px 0 var(--card), 0 0 24px color-mix(in srgb, var(--accent) 45%, transparent);
  animation: burst 1.2s ease-out forwards;
}
@keyframes burst {
  0% { transform: scale(.4) rotate(-6deg); opacity: 0; }
  25% { transform: scale(1.15) rotate(2deg); opacity: 1; }
  60% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.05); opacity: 0; }
}
.bingo-title {
  text-align: center; font-size: clamp(1rem, 3vw, 1.3rem); color: var(--accent);
  padding-bottom: 12px; overflow-wrap: anywhere;
}
.bingo-grid { display: grid; gap: 6px; }
.bingo-grid[data-size="3"] { grid-template-columns: repeat(3, 1fr); }
.bingo-grid[data-size="4"] { grid-template-columns: repeat(4, 1fr); }
.bingo-grid[data-size="5"] { grid-template-columns: repeat(5, 1fr); }

.cell {
  position: relative; aspect-ratio: 1; border: 1.5px dashed var(--line); border-radius: 9px;
  background: var(--paper); display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 4px; font-size: clamp(.58rem, 1.7vw, .8rem); line-height: 1.35;
  overflow: hidden; overflow-wrap: anywhere; cursor: pointer; user-select: none;
  transition: border-color .15s;
}
.cell[contenteditable="true"] { user-select: text; cursor: text; }
.cell[contenteditable="true"]:focus { border-color: var(--accent2); border-style: solid; outline: none; }
.cell:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }
.cell.free { background: color-mix(in srgb, var(--accent) 14%, var(--paper)); border-style: solid; border-color: var(--accent); color: var(--accent); font-weight: 700; }
.cell.marked::after {
  content: ""; position: absolute; inset: 12%;
  border-radius: 50%; background: var(--mark);
  animation: stamp .18s ease-out;
}
.cell.marked { color: color-mix(in srgb, var(--ink) 45%, transparent); }
@keyframes stamp { from { transform: scale(1.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* stats */
.stats { display: flex; gap: 18px; justify-content: center; margin: 14px 0; min-height: 1.8em; }
.stat { font-size: .92rem; color: var(--sub); }
.stat-num { font-weight: 700; font-size: 1.1rem; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat--bingo { display: inline-block; }
.stat--bingo .stat-num { color: var(--accent); }
.stat--bingo.pop { animation: statpop .5s ease-out; }
@keyframes statpop { 30% { transform: scale(1.25); } }
.actions { justify-content: center; }

/* content sections */
.steps, .mini-faq { margin-top: 48px; }
.steps h2, .mini-faq h2 { font-size: 1.2rem; color: var(--accent); margin-bottom: 14px; }
.step-list { padding-left: 1.3em; display: grid; gap: 8px; font-size: .95rem; }
.mini-faq dt { font-weight: 700; margin-top: 12px; }
.mini-faq dd { color: var(--sub); font-size: .93rem; margin-left: 0; }

/* content pages (guide/odai/legal) */
.page { max-width: 760px; margin: 0 auto; padding: 32px 0 56px; }
.page h1 { font-size: clamp(1.4rem, 4vw, 1.9rem); color: var(--accent); margin-bottom: 18px; }
.page h2 { font-size: 1.15rem; color: var(--accent); margin: 32px 0 10px; border-bottom: 2px dashed var(--line); padding-bottom: 6px; }
.page h3 { font-size: 1rem; margin: 20px 0 6px; }
.page p, .page li { font-size: .95rem; }
.page ul, .page ol { padding-left: 1.4em; margin: 8px 0; }
.page .date { font-size: .82rem; color: var(--sub); }
.odai-box {
  background: var(--card); border: 1.5px dashed var(--line); border-radius: var(--radius);
  padding: 14px 18px; margin: 10px 0 18px; font-size: .92rem;
}
.odai-box li { margin: 3px 0; }
.copy-odai-btn {
  font: inherit; font-size: .8rem; font-weight: 700; margin-top: 10px;
  padding: 6px 14px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--accent2); background: transparent; color: var(--accent2);
}
.copy-odai-btn:hover { background: color-mix(in srgb, var(--accent2) 10%, transparent); }
.cta-box { text-align: center; margin: 30px 0; }

/* iOSはfont-size16px未満のフォーム部品にフォーカスすると自動ズームするため、モバイルのみ16pxへ */
@media (max-width: 860px) {
  input[type="text"], select, textarea { font-size: 16px; }
}

/* footer */
.site-footer { border-top: 2px dashed var(--line); padding: 26px 16px 18px; text-align: center; }
.footer-nav { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; font-size: .85rem; }
.footer-nav a { color: var(--sub); text-decoration: none; }
.footer-nav a:hover { color: var(--accent); }
.copyright { font-size: .8rem; color: var(--sub); margin-top: 14px; }
.contact-line { margin-top: 10px; }
.contact-line a { font-size: .72rem; color: var(--sub); }

/* contact form */
.contact-form { max-width: 520px; }
.contact-form .btn { margin-top: 8px; }
.form-status { margin-top: 12px; font-size: .9rem; min-height: 1.6em; }
.form-status.ok { color: var(--accent2); }
.form-status.ng { color: var(--accent); }