:root {
  --washi:#F5F3EA;
  --kinari:#FCFBF4;
  --sumi:#262B24;
  --usuzumi:#4E564B;
  --usuzumi2:#7C857A;
  --tokiwa:#2F5D43;
  --tokiwa-hover:#244934;
  --panel-label:#B7C9BC;
  --panel-text:#F4F7F0;
  --oitake:#6B8069;
  --border:#B9BFAE;
  --keisen:#DBD8C7;
  --men:#E7E5D6;
  --card-border:#E2DFCD;
  --list-bg:#F1EFE3;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--washi); color: var(--sumi); }
body { font-family: 'Shippori Mincho','Hiragino Mincho ProN',serif; }
button, input { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--tokiwa); outline-offset: 2px; }
.gothic { font-family: 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.loading-error { padding: 48px 24px; color: var(--usuzumi); font: 400 14px/1.95 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; text-align: center; }

.mobile-shell { min-height: 100vh; }
.home-header { display: flex; align-items: flex-end; justify-content: space-between; padding: 24px 24px 0; }
.app-title { margin: 0; font-size: 26px; line-height: 1.5; letter-spacing: 0.06em; }
.app-subtitle { margin-top: 4px; color: var(--usuzumi2); font-size: 13.5px; }
.icon-button { display: inline-flex; width: 44px; height: 44px; padding: 0; align-items: center; justify-content: center; border: 0; background: transparent; color: var(--usuzumi); }
.icon-button svg, .row-chevron { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.search-wrap { padding: 12px 24px 0; }
.search-input { width: 100%; min-height: 44px; padding: 10px 14px; border: 1px solid var(--card-border); border-radius: 6px; background: var(--kinari); color: var(--sumi); font: 400 14px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.search-input::placeholder { color: var(--usuzumi2); }

.today-card { margin: 18px 24px 0; padding: 18px; border: 1px solid var(--card-border); border-radius: 6px; background: var(--kinari); }
.today-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.today-title { font-size: 17px; font-weight: 700; line-height: 1.5; }
.summary-panel { padding: 16px 20px; border-radius: 6px; background: var(--tokiwa); }
.today-card .summary-panel { padding: 12px 16px; }
.panel-label, .section-heading, .tag { color: var(--oitake); font: 500 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; letter-spacing: 0.2em; }
.summary-panel .panel-label { margin-bottom: 6px; color: var(--panel-label); }
.summary-text { color: var(--panel-text); font-size: 17px; font-weight: 600; line-height: 1.8; }
.today-card .summary-text { font-size: 14px; }
.primary-button, .secondary-button { min-height: 52px; border-radius: 6px; font: 700 15px/1.4 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; letter-spacing: 0.1em; }
.primary-button { border: 0; background: var(--tokiwa); color: var(--panel-text); }
.primary-button:hover { background: var(--tokiwa-hover); }
.today-card .primary-button { width: 100%; min-height: 52px; margin-top: 14px; }
.secondary-button { min-height: 48px; border: 1px solid var(--border); background: transparent; color: var(--usuzumi); }
.primary-button:disabled { border: 1px solid var(--border); background: transparent; color: var(--usuzumi); cursor: default; }

.section-heading { padding: 22px 24px 8px; }
.section-list { display: flex; flex-direction: column; }
.section-row { display: flex; min-height: 64px; padding: 12px 24px; align-items: center; gap: 12px; border: 0; border-bottom: 1px solid var(--keisen); background: transparent; color: var(--sumi); text-align: left; }
.section-row:hover { background: var(--kinari); }
.section-row-text { min-width: 0; flex: 1; }
.section-row-title { display: block; overflow: hidden; font-size: 15px; font-weight: 600; line-height: 1.5; text-overflow: ellipsis; white-space: nowrap; }
.section-state { display: block; margin-top: 2px; color: var(--usuzumi2); font: 400 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.row-chevron { width: 16px; height: 16px; flex: 0 0 auto; color: var(--border); }
.dan-mark { display: inline-flex; width: 36px; height: 36px; flex: 0 0 auto; align-items: center; justify-content: center; border-radius: 4px; background: var(--men); color: var(--usuzumi2); font-size: 13.5px; }
.dan-mark.today-mark { width: 40px; height: 40px; border: 0; background: var(--tokiwa); color: var(--panel-text); font-weight: 600; }
.dan-mark.learning { border: 1px solid var(--tokiwa); background: transparent; color: var(--tokiwa); }
.dan-mark.done { background: var(--tokiwa); color: var(--panel-text); }
.home-footer { padding: 18px 24px 28px; border-top: 1px solid var(--keisen); }
.progress-copy { display: flex; justify-content: space-between; margin-bottom: 8px; color: var(--usuzumi); font: 400 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.progress-track { height: 4px; overflow: hidden; border-radius: 4px; background: var(--card-border); }
.progress-value { height: 100%; border-radius: 4px; background: var(--oitake); }
.source-note { margin-top: 18px; color: var(--usuzumi2); font: 400 13.5px/1.7 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }

.mobile-dan-nav { display: flex; padding: 12px 16px 0; align-items: center; justify-content: space-between; }
.dan-nav-title { color: var(--usuzumi); font: 500 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; letter-spacing: 0.1em; }
.hidden-nav { visibility: hidden; }
.segments { display: flex; padding: 3px; border-radius: 6px; background: var(--men); }
.mobile-segments { margin: 6px 24px 0; }
.segment { min-height: 44px; flex: 1; padding: 8px; border: 0; border-radius: 4px; background: transparent; color: var(--usuzumi2); font: 500 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.segment.active { background: var(--kinari); box-shadow: 0 1px 2px rgba(38,43,36,0.10); color: var(--sumi); font-weight: 700; }
.dan-content { padding: 18px 24px 32px; }
.dan-title { margin: 0 0 14px; font-size: 21px; line-height: 1.5; }
.original-card { margin-top: 18px; padding: 16px 20px; border: 1px solid var(--card-border); border-radius: 6px; background: var(--kinari); }
.tag { display: inline-flex; padding: 3px 12px; border: 1px solid var(--tokiwa); border-radius: 4px; color: var(--tokiwa); letter-spacing: 0.14em; }
.translation .tag { border-color: var(--border); color: var(--oitake); }
.original-lines { display: flex; margin-top: 10px; flex-direction: column; gap: 9px; font-size: 17px; font-weight: 500; line-height: 1.85; }
.translation { margin-top: 16px; }
.translation-text { margin-top: 10px; color: var(--usuzumi); font: 400 14px/1.95 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.day-dots { display: flex; margin-top: 24px; padding-top: 12px; justify-content: space-between; gap: 4px; border-top: 1px solid var(--keisen); }
.day-item { display: flex; align-items: center; flex-direction: column; gap: 4px; color: var(--usuzumi2); font: 400 13.5px/1.4 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; white-space: nowrap; }
.day-dot { width: 14px; height: 14px; border: 1px solid var(--border); border-radius: 3px; }
.day-dot.done { border-color: var(--tokiwa); background: var(--tokiwa); }
.dan-actions { margin-top: 12px; }
.dan-actions .primary-button { width: 100%; }

.desktop-shell { display: none; min-height: 100vh; }
.desktop-topbar { display: flex; min-height: 64px; padding: 0 32px; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--keisen); }
.desktop-brand { display: flex; align-items: baseline; gap: 14px; }
.desktop-brand-title { font-size: 19px; font-weight: 700; letter-spacing: 0.06em; }
.desktop-meta, .desktop-progress { color: var(--usuzumi2); font: 400 13.5px/1.5 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.desktop-tools { display: flex; align-items: center; gap: 16px; }
.desktop-search { width: 260px; }
.desktop-body { display: flex; min-height: 0; flex: 1; }
.desktop-list-pane { display: flex; width: 340px; flex: 0 0 340px; flex-direction: column; border-right: 1px solid var(--keisen); background: var(--list-bg); }
.desktop-list { display: flex; flex-direction: column; overflow-y: auto; }
.desktop-list .section-row { min-height: 60px; padding: 10px 20px; }
.desktop-list .dan-mark { width: 34px; height: 34px; }
.desktop-list .section-row.selected { background: var(--kinari); }
.desktop-view-pane { min-width: 0; flex: 1; overflow-y: auto; }
.desktop-view { width: min(680px, calc(100% - 64px)); margin: 0 auto; padding: 32px 0 48px; }
.desktop-view-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.desktop-view .segments { width: 320px; max-width: 100%; flex: 0 1 auto; }
.desktop-view .dan-title { margin-top: 20px; font-size: 26px; }
.desktop-view .original-lines { font-size: 18px; }
.desktop-buttons { display: flex; margin-top: 20px; gap: 12px; }
.desktop-buttons .primary-button { min-width: 220px; padding: 0 28px; }
.desktop-buttons .secondary-button { padding: 0 24px; }
.desktop-source { padding: 12px 24px; border-top: 1px solid var(--keisen); color: var(--usuzumi2); font: 400 13.5px/1.7 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }
.empty-result { padding: 24px; color: var(--usuzumi2); font: 400 14px/1.8 'Zen Kaku Gothic New','Hiragino Sans',sans-serif; }

@media (min-width: 768px) {
  .mobile-shell { display: none; }
  .desktop-shell { display: flex; flex-direction: column; }
}

@media (max-width: 420px) {
  .day-item { font-size: 13.5px; letter-spacing: -0.04em; }
}