.zenkaku-page {
  --zen-blue: #2563eb;
  --zen-blue-dark: #1d4ed8;
  --zen-teal: #0f766e;
  --zen-amber: #d97706;
  --zen-rose: #be123c;
  --zen-ink: #172033;
}

.zenkaku-body {
  padding-bottom: 0;
}

.zenkaku-body .toast {
  z-index: 45;
}

.zen-hero {
  background:
    linear-gradient(135deg, rgba(20, 24, 39, 0.97), rgba(37, 99, 235, 0.9)),
    linear-gradient(90deg, rgba(15, 118, 110, 0.48), rgba(217, 119, 6, 0.28));
}

.zen-hero h1,
.zen-hero .hero-copy {
  max-width: min(860px, calc(100vw - 32px));
  overflow-wrap: anywhere;
}

.zen-preview-strip {
  width: min(100%, 900px, calc(100vw - 32px));
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.zen-preview-strip span {
  min-width: 0;
  min-height: 52px;
  display: grid;
  place-items: center;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 18px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  word-break: break-all;
  overflow: hidden;
  text-align: center;
}

.zen-wrap {
  max-width: 1180px;
  margin: -16px auto 0;
  padding: 0 20px 48px;
}

.zen-app {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.zen-workspace {
  grid-column: 1;
  min-width: 0;
}

.zen-presets {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  background: #f9fbff;
  scrollbar-width: none;
}

.zen-presets::-webkit-scrollbar {
  display: none;
}

.zen-preset {
  flex: 0 0 auto;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.zen-preset:hover {
  border-color: #93c5fd;
  color: var(--zen-blue);
}

.zen-preset.active {
  border-color: var(--zen-blue);
  background: var(--zen-blue);
  color: #fff;
}

.zen-editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  background: #fbfcff;
}

.zen-panel {
  min-width: 0;
  display: grid;
  gap: 10px;
}

.zen-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.zen-label-row label,
.zen-label-row span:first-child {
  color: var(--zen-ink);
  font-weight: 900;
}

.zen-stat {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.zen-textarea {
  width: 100%;
  min-width: 0;
  min-height: 210px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 16px;
  line-height: 1.65;
  resize: vertical;
}

.zen-textarea:focus {
  outline: 3px solid rgba(37, 99, 235, 0.16);
  border-color: #60a5fa;
}

.zen-output {
  background: #f8fafc;
}

.zen-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.zen-secondary,
.zen-copy {
  min-width: 0;
  min-height: 42px;
  padding: 0 12px;
  border-radius: 8px;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.zen-secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

.zen-secondary:hover:not(:disabled) {
  border-color: #99f6e4;
  color: var(--zen-teal);
}

.zen-copy {
  border: 0;
  background: var(--primary);
  color: #fff;
}

.zen-copy:hover:not(:disabled) {
  background: var(--primary-dark);
}

.zen-copy:disabled,
.zen-secondary:disabled {
  background: #e4e8f2;
  color: #8a94a6;
  cursor: not-allowed;
}

.zen-copy.copied,
.zen-recent-latest.copied,
.zen-recent-chips button.copied {
  background: var(--success);
  color: #fff;
}

.zen-samples {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.zen-samples::-webkit-scrollbar {
  display: none;
}

.zen-samples button {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ecfeff;
  color: #155e75;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.zen-samples button:hover {
  border-color: #67e8f9;
  background: #fff;
}

.zen-status-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 0 16px 16px;
  background: #fbfcff;
}

.zen-status {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.zen-status strong {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.zen-status span {
  display: block;
  margin-top: 4px;
  color: var(--zen-ink);
  font-weight: 900;
  overflow-wrap: anywhere;
}

.zen-options {
  border-top: 1px solid var(--line);
  background: #fff;
}

.zen-options summary {
  min-height: 50px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  color: var(--zen-ink);
  font-weight: 900;
  cursor: pointer;
}

.zen-option-grid {
  display: grid;
  gap: 10px;
  padding: 0 16px 16px;
}

.zen-option-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

.zen-option-row strong {
  color: var(--muted);
  font-size: 13px;
}

.zen-segments {
  min-width: 0;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.zen-segments button {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.zen-segments button.active {
  border-color: var(--zen-teal);
  background: #ccfbf1;
  color: #134e4a;
}

.zen-note {
  margin: 0;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: #fff7ed;
  color: #7c2d12;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
}

.zen-recent {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  position: sticky;
  top: 14px;
  z-index: 30;
  width: auto;
  max-height: calc(100vh - 28px);
  margin: 16px 16px 16px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.zen-recent[hidden] {
  display: none;
}

.zen-recent:not(.is-open) .zen-recent-body {
  display: none;
}

.zen-recent-bar {
  min-height: 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 14px;
  border-bottom: 1px solid var(--line);
  background: #f9fbff;
}

.zen-recent-toggle {
  min-width: 0;
  min-height: 48px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0;
  text-align: left;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.zen-recent-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: #dbeafe;
  color: var(--zen-blue);
  font-size: 22px;
  line-height: 1;
  font-weight: 900;
}

.zen-recent-title,
.zen-recent-count,
.zen-recent-action {
  min-width: 0;
  white-space: nowrap;
}

.zen-recent-title {
  overflow: hidden;
  text-overflow: ellipsis;
}

.zen-recent-count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.zen-recent-action {
  color: var(--primary);
  font-size: 13px;
  display: none;
}

.zen-recent-latest {
  min-width: 0;
  min-height: 44px;
  width: 92px;
  padding: 0 10px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  cursor: pointer;
}

.zen-recent-latest:disabled {
  background: #e4e8f2;
  color: #8a94a6;
  cursor: not-allowed;
}

.zen-recent-body {
  max-height: calc(100vh - 92px);
  overflow-y: auto;
  padding: 12px;
  background: #fff;
  -webkit-overflow-scrolling: touch;
}

.zen-recent-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
}

.zen-recent-head button {
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.zen-recent-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.zen-recent-chips button {
  flex: 0 1 auto;
  max-width: min(310px, 75vw);
  min-height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  font: inherit;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.zen-recent-empty {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.6;
}

.zen-use-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.zen-use-card {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.zen-use-card strong {
  display: block;
  margin-bottom: 6px;
}

.zen-use-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 920px) {
  .zen-app {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .zen-editor-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .zenkaku-body {
    padding-bottom: calc(78px + env(safe-area-inset-bottom));
  }

  .zen-app {
    display: block;
  }

  .zen-wrap {
    padding-left: 12px;
    padding-right: 12px;
  }

  .zen-hero {
    overflow: hidden;
  }

  .zen-hero .hero-inner {
    max-width: 100%;
    overflow: hidden;
  }

  .zen-hero h1,
  .zen-hero .hero-copy {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .zen-preview-strip {
    width: 100%;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .zen-preview-strip span {
    min-height: 44px;
  }

  .zen-presets {
    padding: 12px;
  }

  .zen-editor-grid {
    padding: 12px;
  }

  .zen-textarea {
    min-height: 170px;
  }

  .zen-status-row {
    grid-template-columns: 1fr;
    padding: 0 12px 12px;
  }

  .zen-options summary,
  .zen-note {
    padding-left: 12px;
    padding-right: 12px;
  }

  .zen-option-grid {
    padding: 0 12px 12px;
  }

  .zen-option-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .zen-use-list {
    grid-template-columns: 1fr;
  }

  .zen-recent {
    position: fixed;
    grid-column: auto;
    grid-row: auto;
    left: 10px;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    top: auto;
    width: auto;
    max-height: min(54vh, 430px);
    margin: 0;
    border-color: #d6deeb;
    border-radius: 18px;
    background: #eef2f7;
    box-shadow: 0 -18px 45px rgba(15, 23, 42, 0.18);
    transition: transform 0.22s ease;
    transform: translateY(calc(100% - 64px));
  }

  .zen-recent.is-open {
    transform: translateY(0);
  }

  .zen-recent-bar {
    border-bottom-color: #d6deeb;
    background: rgba(241, 245, 249, 0.97);
    backdrop-filter: blur(14px);
    padding: 8px 9px 8px 12px;
    gap: 8px;
  }

  .zen-recent-count {
    display: none;
  }

  .zen-recent-action {
    display: inline;
  }

  .zen-recent-latest {
    width: 86px;
  }

  .zen-recent-body {
    max-height: calc(min(54vh, 430px) - 64px);
    background: #eef2f7;
  }
}

@media (max-width: 520px) {
  .zen-actions {
    grid-template-columns: 1fr;
  }
}