:root {
  --ek-bg: #f7f3ea;
  --ek-paper: #fffaf0;
  --ek-ink: #252018;
  --ek-muted: #6f6658;
  --ek-line: #d8cbb8;
  --ek-accent: #7a2f1d;
  --ek-accent-2: #124c47;
  --ek-soft: #efe4d2;
  --ek-shadow: 0 10px 30px rgba(37, 32, 24, .08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--ek-bg);
  color: var(--ek-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  line-height: 1.65;
}
.takashima-app {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 22px 16px 48px;
}
.top-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 4px 0 18px;
}
.nav-btn {
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--ek-ink);
  background: var(--ek-paper);
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  box-shadow: var(--ek-shadow);
  font-size: 18px;
  font-weight: 800;
  white-space: nowrap;
}
.nav-btn.is-active {
  background: var(--ek-accent);
  border-color: var(--ek-accent);
  color: #fff;
}
.nav-btn:active {
  transform: translateY(1px);
}
.intro { padding: 20px 2px 12px; }
.eyebrow { color: var(--ek-accent); font-weight: 700; margin: 0 0 6px; }
h1 { font-size: clamp(30px, 8vw, 44px); line-height: 1.12; margin: 0 0 14px; letter-spacing: 0; }
h2 { font-size: 21px; margin: 0 0 12px; letter-spacing: 0; }
p { margin: 0 0 12px; }
code { font-size: .95em; overflow-wrap: anywhere; }
.notice {
  color: var(--ek-muted);
  font-size: 15px;
}
.question-guide {
  color: var(--ek-muted);
  font-size: 15px;
  line-height: 1.55;
  margin: 0 0 14px;
}
.panel, .result-card {
  background: var(--ek-paper);
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  box-shadow: var(--ek-shadow);
  padding: 16px;
  margin: 14px 0;
}
label, legend { font-weight: 700; }
textarea, select {
  width: 100%;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  padding: 12px;
  font: inherit;
  background: #fffdf8;
  color: var(--ek-ink);
}
textarea { margin-top: 8px; resize: vertical; }
.mode-group {
  border: 0;
  padding: 14px 0 4px;
  margin: 0;
  display: grid;
  gap: 8px;
}
.mode-group label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--ek-soft);
  border-radius: 8px;
}
.mode-note { color: var(--ek-muted); font-size: 15px; }
.actions { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 12px; }
button {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.primary { background: var(--ek-accent); color: white; }
.secondary { background: #e7dcc8; color: var(--ek-ink); }
button:disabled { opacity: .55; cursor: not-allowed; }
.panel-title {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-weight: 800;
  margin-bottom: 10px;
}
.panel-title span { color: var(--ek-muted); font-weight: 600; }
.dev-grid { display: grid; grid-template-columns: 1fr; gap: 10px; margin-bottom: 12px; }
.draw-steps {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}
.step {
  background: #fffdf8;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  padding: 10px 12px;
  animation: ekFade .32s ease-out both;
}
@keyframes ekFade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
.result-card h2 { font-size: 26px; margin-bottom: 4px; }
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 14px;
}
.pill {
  background: var(--ek-soft);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 14px;
  color: #40382e;
}
.result-facts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 0;
  margin: 10px 0 10px;
  padding: 10px 12px;
  background: #fffdf8;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
}
.result-question {
  color: var(--ek-muted);
  font-size: 15px;
  margin: 0 0 10px;
}
.result-facts span {
  color: var(--ek-ink);
  font-weight: 750;
  overflow-wrap: anywhere;
}
.result-facts span + span::before {
  content: "｜";
  color: var(--ek-muted);
  font-weight: 600;
  padding: 0 8px;
}
.line-text {
  margin: 0 0 14px;
  padding: 10px 12px;
  background: #f4ead9;
  border-radius: 8px;
  font-size: 16px;
}
.hexagram-lines {
  width: min(160px, 60vw);
  display: grid;
  gap: 9px;
  margin: 14px auto;
  padding: 14px 0;
}
.yao {
  height: 12px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.yao.yang::before, .yao.yin::before, .yao.yin::after {
  content: "";
  display: block;
  height: 12px;
  background: var(--ek-ink);
  border-radius: 2px;
}
.yao.yin { grid-template-columns: 1fr 1fr; }
.plain {
  font-size: 20px;
  font-weight: 750;
  padding: 14px;
  background: #f4ead9;
  border-radius: 8px;
}
.warning {
  background: #fff3d8;
  border: 1px solid #e0b45b;
  border-radius: 8px;
  padding: 12px;
}
details {
  border-top: 1px solid var(--ek-line);
  margin-top: 12px;
  padding-top: 12px;
}
summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--ek-accent-2);
}
.source-list, .case-list { padding-left: 18px; }
.source-list li, .case-list li { margin-bottom: 8px; overflow-wrap: anywhere; }
.subtle { color: var(--ek-muted); font-size: 14px; }
@media (min-width: 640px) {
  .actions { grid-template-columns: 1fr 1fr; }
  .dev-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 380px) {
  .takashima-app { padding-left: 12px; padding-right: 12px; }
  .plain { font-size: 18px; }
  .result-facts { font-size: 14px; padding: 9px 10px; }
  .result-facts span + span::before { padding: 0 5px; }
  .line-text { font-size: 15px; }
}

.manual-request-block {
  border-top: 1px solid var(--ek-line);
  margin-top: 16px;
  padding-top: 14px;
}
.manual-request-block p {
  color: var(--ek-muted);
  font-size: 15px;
}
.result-actions {
  display: grid;
  gap: 10px;
  margin-top: 6px;
}
.manual-open,
.share-open {
  width: 100%;
}
a.manual-open {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 48px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}
.share-status {
  color: var(--ek-accent-2);
  font-size: 14px;
  font-weight: 700;
  margin: 8px 0 0;
}
@media (min-width: 640px) {
  .result-actions { grid-template-columns: 1fr 1fr; }
}
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(37, 32, 24, .45);
  padding: 14px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
}
.modal-backdrop[hidden] { display: none; }
.manual-modal {
  width: min(100%, 680px);
  margin: 22px 0;
  background: var(--ek-paper);
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(37, 32, 24, .22);
  padding: 16px;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.modal-head h2 { margin: 0; font-size: 22px; }
.icon-btn {
  width: 44px;
  min-height: 44px;
  border: 1px solid var(--ek-line);
  background: #fffdf8;
  color: var(--ek-ink);
  font-size: 28px;
  line-height: 1;
}
.manual-modal input[type="text"],
.manual-modal input[type="email"] {
  width: 100%;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  padding: 12px;
  font: inherit;
  background: #fffdf8;
  color: var(--ek-ink);
  margin-top: 8px;
}
.manual-modal input[readonly], .manual-modal textarea[readonly] {
  color: var(--ek-muted);
  background: #f6efe2;
}
.readonly-grid {
  display: grid;
  gap: 10px;
  margin: 10px 0;
}
.privacy-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  margin: 12px 0;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  background: #f4ead9;
  font-weight: 600;
}
.privacy-check input { margin-top: 7px; }
.bot-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}
.submission-preview pre {
  max-height: 260px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #fffdf8;
  border: 1px solid var(--ek-line);
  border-radius: 8px;
  padding: 10px;
  font-size: 13px;
}
.modal-actions {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}
.form-status {
  margin-top: 12px;
  color: var(--ek-accent-2);
  font-weight: 700;
}
@media (min-width: 640px) {
  .readonly-grid { grid-template-columns: 1fr 1fr; }
  .modal-actions { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 380px) {
  .modal-backdrop { padding: 8px; }
  .manual-modal { padding: 12px; margin: 8px 0; }
  .modal-head h2 { font-size: 20px; }
}