:root {
  --bg: #14100d;
  --panel: #1e1813;
  --panel-2: #262019;
  --border: #3a3128;
  --text: #f2ede8;
  --muted: #b4a79a;
  --accent: #ff9d45;
  --accent-strong: #ffb367;
  --danger: #ff7a6b;
  --ok: #7fd6a4;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", "PingFang TC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

.shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.25rem 1.1rem 4rem;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}

.brand {
  font-size: 1.9rem;
  letter-spacing: 0.35em;
  margin: 0;
  font-weight: 700;
}

.lang {
  display: flex;
  gap: 0.35rem;
}

.lang button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.lang button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #241505;
  font-weight: 600;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 1rem;
  font-size: 0.9rem;
}

.intro {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  font-size: 0.92rem;
  color: #ddd3c8;
  margin-bottom: 1.5rem;
}

.intro p { margin: 0 0 0.7rem; }
.intro p:last-child { margin-bottom: 0; }
.intro .highlight { color: var(--accent-strong); }

fieldset.choice-group {
  border: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

fieldset.choice-group legend {
  font-weight: 600;
  margin-bottom: 0.5rem;
  padding: 0;
}

.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.choice {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 0.5rem;
  cursor: pointer;
  text-align: center;
  font-size: 0.95rem;
}

.choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice:has(input:checked) {
  border-color: var(--accent);
  background: rgba(255, 157, 69, 0.12);
  color: var(--accent-strong);
  font-weight: 600;
}

.hint {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0.6rem 0 0;
}

.named-box {
  margin-top: 0.7rem;
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.named-box p { margin: 0; font-size: 0.9rem; }
.named-box .ok { color: var(--ok); }

.field { margin-bottom: 1.15rem; }

.field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

.count {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 400;
  white-space: nowrap;
}

.count.over { color: var(--danger); font-weight: 600; }

input[type="text"], textarea {
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  font-size: 16px;
}

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea { resize: vertical; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

.btn.primary {
  width: 100%;
  background: var(--accent);
  color: #241505;
  padding: 0.9rem;
  font-size: 1.05rem;
  margin-top: 0.3rem;
}

.btn.primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.secondary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent-strong);
  padding: 0.5rem 1.1rem;
  font-size: 0.9rem;
}

.link {
  color: var(--muted);
  font-size: 0.82rem;
}

.error {
  color: var(--danger);
  font-size: 0.88rem;
  margin: 0.8rem 0;
}

.privacy {
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  margin-top: 1rem;
}

.done {
  text-align: center;
  padding: 3rem 1rem;
}

.done-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: rgba(127, 214, 164, 0.15);
  color: var(--ok);
  font-size: 2rem;
  display: grid;
  place-items: center;
}

.done h2 { margin: 0 0 0.5rem; }
.done p { color: var(--muted); margin: 0 0 1.5rem; }

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tab {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.6rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.tab.active {
  background: rgba(255, 157, 69, 0.12);
  border-color: var(--accent);
  color: var(--accent-strong);
}

.code-box {
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.1rem;
  margin: 1.2rem 0 0.8rem;
}

.code-label {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0 0 0.3rem;
}

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.7rem;
  letter-spacing: 0.12em;
  color: var(--accent-strong);
  margin: 0 0 0.8rem;
  user-select: all;
  word-break: break-all;
}

.code-warning {
  color: var(--danger);
  font-size: 0.85rem;
  text-align: left;
  margin: 0 0 1.5rem;
}

.submission-summary {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.submission-summary summary {
  cursor: pointer;
  color: var(--muted);
}

.submission-summary dl { margin: 0.8rem 0 0; }
.submission-summary dt { font-weight: 600; font-size: 0.85rem; color: var(--muted); }
.submission-summary dd { margin: 0.15rem 0 0.7rem; white-space: pre-wrap; }

.reply {
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin-bottom: 0.9rem;
}

.reply header {
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.reply p { margin: 0; white-space: pre-wrap; }

.reply-images { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.6rem; }
.reply-images img { max-width: 100%; border-radius: 8px; }
.reply-images:empty { display: none; }

/* ---------- admin ---------- */

.admin-list { display: grid; gap: 0.6rem; }

.thread-card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.thread-card:hover { border-color: var(--accent); }

.thread-card .meta {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 0.3rem;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
}

.badge.suggestion { background: rgba(124, 184, 255, 0.15); color: #7cb8ff; }
.badge.report { background: rgba(255, 122, 107, 0.15); color: var(--danger); }
.badge.replied { background: rgba(127, 214, 164, 0.15); color: var(--ok); }

.back-link {
  display: inline-block;
  color: var(--accent-strong);
  margin-bottom: 1rem;
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  padding: 0;
}

.reply-form { margin-top: 1.2rem; }

.reply-form textarea { width: 100%; }

.image-previews { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 0.6rem 0; }
.image-previews .preview { position: relative; }
.image-previews img { width: 84px; height: 84px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }
.image-previews .remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: var(--danger);
  color: #fff;
  font-size: 0.8rem;
  cursor: pointer;
  line-height: 1;
}

.file-btn { margin: 0.4rem 0; }

@media (max-width: 420px) {
  .brand { font-size: 1.6rem; letter-spacing: 0.25em; }
  .shell { padding: 1rem 0.9rem 3rem; }
}