/* ── CSS Variables (Dark Mode default) ───── */
:root {
  --bg:          #0f1117;
  --surface:     #1a1d27;
  --card:        #252836;
  --card-hover:  #303448;
  --border:      #2a2d3a;
  --border-lite: #3a3d4a;
  --text:        #e0e0e0;
  --text-sub:    #aaa;
  --text-muted:  #666;
  --accent:      #5b7fff;
  --accent-dark: #4a6be0;
  --danger:      #c0392b;

  /* Chart-specific */
  --chart-bg:      #0f1117;
  --chart-stripe:  #13151e;
  --chart-grid:    #181b25;
  --chart-panel:   #0f1117;
  --chart-yr-text: #707080;
  --chart-ev-line: #8b2020;
  --chart-ev-text: #a03030;
  --chart-emp-a:   #1e1810;
  --chart-emp-b:   #101610;
  --chart-ret:     #10101e;
  --chart-rul-2a:  #0e1a2a;
  --chart-rul-2b:  #0a1420;
  --chart-rul-3a:  #0e1e16;
  --chart-rul-3b:  #0a1810;
}

/* ── Light Mode ───────────────────────────── */
body.light {
  --bg:          #f4f6fb;
  --surface:     #ffffff;
  --card:        #eef0f7;
  --card-hover:  #e2e6f0;
  --border:      #d8dce8;
  --border-lite: #c8cdd8;
  --text:        #1a1d2e;
  --text-sub:    #555;
  --text-muted:  #999;
  --accent:      #4a6be0;
  --accent-dark: #3a5acc;
  --danger:      #c0392b;

  --chart-bg:      #f4f6fb;
  --chart-stripe:  #eaecf4;
  --chart-grid:    #dde0ec;
  --chart-panel:   #f4f6fb;
  --chart-yr-text: #888;
  --chart-ev-line: #c0392b;
  --chart-ev-text: #c0392b;
  --chart-emp-a:   #fdf3e3;
  --chart-emp-b:   #f0fbf0;
  --chart-ret:     #eef0fb;
  --chart-rul-2a:  #e8f0fb;
  --chart-rul-2b:  #dce8f8;
  --chart-rul-3a:  #e8faf0;
  --chart-rul-3b:  #daf5e8;
}

/* ── Reset & Base ─────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg); color: var(--text);
  overflow: hidden; height: 100vh;
  transition: background 0.3s, color 0.3s;
}
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-lite); border-radius: 3px; }

/* ── Layout ───────────────────────────────── */
#app { display: flex; height: 100vh; }

/* ── Sidebar ──────────────────────────────── */
#sidebar {
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  flex-shrink: 0; overflow: hidden;
  transition: width 0.25s ease, background 0.3s;
  position: relative; z-index: 10;
}
#sidebar.collapsed { width: 0; border-right: none; }
#sidebar-inner { width: 260px; height: 100%; display: flex; flex-direction: column; }

#sidebar h1 {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 8px 12px 14px;
  border-bottom: 1px solid var(--border);
}
.h1-text { font-size: 15px; color: var(--text); white-space: nowrap; line-height: 1.3; }
.h1-text span { font-size: 10px; color: var(--text-muted); display: block; margin-top: 2px; }

.era-list { flex: 1; overflow-y: auto; padding: 8px; }
.era-item {
  padding: 9px 11px; margin: 3px 0; border-radius: 7px; cursor: pointer;
  transition: all 0.15s; border: 1px solid transparent;
}
.era-item:hover  { background: var(--card); }
.era-item.active { background: var(--card); border-color: var(--accent); }
.era-item .era-name   { font-size: 13px; font-weight: 600; white-space: nowrap; color: var(--text); }
.era-item .era-period { font-size: 10px; color: var(--text-muted); margin-top: 1px; }
.era-item .era-count  { font-size: 10px; color: var(--accent); margin-top: 1px; }

/* Filters */
.filter-section { padding: 10px 12px; border-top: 1px solid var(--border); }
.filter-section h3 { font-size: 10px; color: var(--text-muted); margin-bottom: 6px; }
.filter-check { display: flex; align-items: center; gap: 5px; margin: 3px 0; font-size: 11px; cursor: pointer; color: var(--text-sub); }
.filter-check input { accent-color: var(--accent); cursor: pointer; }
.filter-dot { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }

/* Add button */
#sidebar-footer { padding: 10px; border-top: 1px solid var(--border); }
#sidebar-footer button {
  width: 100%; padding: 8px; background: var(--accent); color: #fff; border: none;
  border-radius: 6px; cursor: pointer; font-size: 12px; font-weight: 600;
  transition: background 0.15s; white-space: nowrap;
}
#sidebar-footer button:hover { background: var(--accent-dark); }

/* ── Toggle (inside sidebar header) ──────── */
#toggle-btn {
  flex-shrink: 0; width: 28px; height: 28px;
  background: transparent; border: 1px solid var(--border-lite);
  border-radius: 6px; cursor: pointer; color: var(--text-muted); font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, color 0.15s; user-select: none;
}
#toggle-btn:hover { background: var(--card); color: var(--text); }

/* ── Expand button (toolbar, when sidebar is closed) ── */
#expand-btn {
  flex-shrink: 0; width: 28px; height: 28px;
  background: transparent; border: 1px solid var(--border-lite);
  border-radius: 6px; cursor: pointer; color: var(--text-muted); font-size: 13px;
  align-items: center; justify-content: center;
  transition: background 0.15s, color 0.15s; user-select: none;
  margin-right: 2px;
}
#expand-btn:hover { background: var(--card); color: var(--text); }

/* ── Main panel ───────────────────────────── */
#main { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-width: 0; position: relative; }

/* ── Chart + Age panel row ────────────────── */
#chart-row { display: flex; flex-direction: row; flex: 1; overflow: hidden; min-height: 0; }

/* ── Age Panel ────────────────────────────── */
#age-panel {
  flex-shrink: 0;
  width: 0;
  overflow: hidden;
  background: var(--surface);
  border-left: none;
  display: flex; flex-direction: column;
  z-index: 20;
  transition: width 0.22s ease, background 0.3s;
  box-shadow: -4px 0 18px rgba(0,0,0,0.25);
}
#age-panel.open {
  width: 220px;
  border-left: 1px solid var(--border);
}

#age-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px 4px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#age-panel-year {
  font-size: 20px; font-weight: 700; color: var(--accent); letter-spacing: 0.5px;
}
#age-panel-close {
  width: 24px; height: 24px; background: transparent;
  border: 1px solid var(--border-lite); border-radius: 5px;
  cursor: pointer; color: var(--text-muted); font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, color 0.15s;
}
#age-panel-close:hover { background: var(--card); color: var(--text); }

#age-panel-subtitle {
  font-size: 9px; color: var(--text-muted); padding: 4px 12px 6px;
  border-bottom: 1px solid var(--border); flex-shrink: 0;
  text-transform: uppercase; letter-spacing: 0.5px;
}

#age-panel-list {
  flex: 1; overflow-y: auto; padding: 6px 0;
}

.age-item {
  display: flex; align-items: center; gap: 7px;
  padding: 5px 12px; font-size: 12px;
  transition: background 0.1s;
}
.age-item:hover { background: var(--card); }
.age-alive { opacity: 1; }
.age-dead  { opacity: 0.35; }
.age-dot {
  width: 7px; height: 7px; border-radius: 2px; flex-shrink: 0;
}
.age-name {
  flex: 1; color: var(--text); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.age-val {
  font-size: 12px; font-weight: 700; color: var(--accent);
  white-space: nowrap; flex-shrink: 0;
}
.age-dead .age-val  { color: var(--text-muted); font-weight: 400; }
.age-sep {
  font-size: 9px; color: var(--text-muted); padding: 4px 12px 2px;
  letter-spacing: 0.5px; text-transform: uppercase;
  border-top: 1px solid var(--border); margin-top: 4px;
}

/* Event section in age panel */
.age-ev-sec {
  margin: 4px 8px 6px;
  background: color-mix(in srgb, var(--chart-ev-line) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--chart-ev-line) 35%, transparent);
  border-radius: 6px;
  padding: 4px 2px;
}
.age-ev-item {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 8px; font-size: 12px;
}
.age-ev-icon { font-size: 10px; flex-shrink: 0; opacity: 0.8; }
.age-ev-name { color: var(--chart-ev-text); font-weight: 600; line-height: 1.3; }
.age-role { font-size: 10px; color: var(--accent); font-weight: 600; margin-left: 2px; }

/* Toolbar */
#toolbar {
  display: flex; align-items: center; gap: 8px; padding: 7px 14px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  min-height: 46px; flex-shrink: 0; flex-wrap: wrap;
  position: relative;
  transition: background 0.3s;
}
#toolbar .t-title { font-size: 14px; font-weight: 700; margin-right: auto; white-space: nowrap; color: var(--text); }

.legend { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.legend-item { display: flex; align-items: center; gap: 3px; font-size: 10px; color: var(--text-sub); }
.legend-dot { width: 8px; height: 8px; border-radius: 2px; }

#zoom-info { font-size: 11px; color: var(--text-muted); min-width: 38px; text-align: right; }

.tbtn {
  padding: 4px 9px; background: var(--card); border: 1px solid var(--border-lite);
  color: var(--text-sub); border-radius: 5px; cursor: pointer; font-size: 11px;
  transition: all 0.12s; white-space: nowrap;
}
.tbtn:hover { background: var(--card-hover); color: var(--text); }

/* ── Sort segmented control ───────────────── */
.seg-ctrl {
  display: flex; border: 1px solid var(--border-lite);
  border-radius: 6px; overflow: hidden; flex-shrink: 0;
}
.seg-btn {
  padding: 4px 10px; background: var(--card);
  border: none; border-right: 1px solid var(--border-lite);
  color: var(--text-muted); cursor: pointer; font-size: 11px;
  transition: all 0.12s; white-space: nowrap;
}
.seg-btn:last-child { border-right: none; }
.seg-btn:hover { background: var(--card-hover); color: var(--text); }
.seg-btn.seg-active {
  background: var(--accent); color: #fff; font-weight: 600;
}

/* ── Hamburger button ─────────────────────── */
#hamburger-btn {
  flex-shrink: 0; width: 32px; height: 32px;
  background: transparent; border: 1px solid var(--border-lite);
  border-radius: 7px; cursor: pointer; color: var(--text-muted);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; transition: background 0.15s, color 0.15s; user-select: none;
  margin-left: 4px;
}
#hamburger-btn:hover { background: var(--card); color: var(--text); }
#hamburger-btn span {
  display: block; width: 14px; height: 1.5px;
  background: currentColor; border-radius: 2px;
  transition: background 0.15s;
}

/* ── Hamburger dropdown menu ──────────────── */
#hamburger-menu {
  position: absolute; top: calc(100% + 6px); right: 14px; z-index: 100;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25); min-width: 200px;
  transition: background 0.3s;
}
#hamburger-menu.hidden { display: none; }

.hmenu-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; cursor: pointer;
  font-size: 13px; color: var(--text-sub);
  transition: background 0.12s, color 0.12s;
  user-select: none;
}
.hmenu-item:hover { background: var(--card); color: var(--text); }
.hmenu-item .hm-icon { font-size: 16px; width: 20px; text-align: center; }
.hmenu-item .hm-label { flex: 1; }
.hmenu-item .hm-badge {
  font-size: 10px; padding: 1px 7px; border-radius: 20px;
  background: var(--card); color: var(--text-muted); border: 1px solid var(--border-lite);
}
.hmenu-sep { height: 1px; background: var(--border); margin: 6px 0; }

/* ── Theme toggle switch ──────────────────── */
.theme-toggle {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; cursor: pointer;
  font-size: 13px; color: var(--text-sub);
  transition: background 0.12s, color 0.12s;
}
.theme-toggle:hover { background: var(--card); color: var(--text); }
.theme-toggle .hm-icon { font-size: 16px; width: 20px; text-align: center; }
.theme-toggle .hm-label { flex: 1; }

/* Toggle pill */
.pill {
  width: 36px; height: 20px; border-radius: 10px;
  background: var(--border-lite); position: relative;
  transition: background 0.2s; flex-shrink: 0;
}
.pill::after {
  content: ''; position: absolute; top: 3px; left: 3px;
  width: 14px; height: 14px; border-radius: 50%;
  background: #fff; transition: left 0.2s;
}
body.light .pill { background: var(--accent); }
body.light .pill::after { left: 19px; }

/* ── Chart area ───────────────────────────── */
#chart-wrap { flex: 1; position: relative; overflow: hidden; }
#chart-wrap svg { display: block; }

/* ── Tooltip ──────────────────────────────── */
#tooltip {
  position: fixed; pointer-events: none;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 13px; font-size: 12px; max-width: 260px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.2); z-index: 200;
  opacity: 0; transition: opacity 0.1s;
}
#tooltip.show { opacity: 1; }
#tooltip .tt-name  { font-size: 13px; font-weight: 700; color: var(--text); }
#tooltip .tt-role  { font-size: 10px; color: var(--accent); margin-top: 2px; }
#tooltip .tt-years { font-size: 11px; color: var(--text-sub); margin-top: 5px; }
#tooltip .tt-age   { font-size: 10px; color: var(--text-muted); margin-top: 1px; }
#tooltip .tt-fic   { font-size: 10px; color: #b898ff; font-weight: 400; margin-left: 3px; }

/* ── Modal ────────────────────────────────── */
.modal-bg {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  z-index: 300; display: flex; align-items: center; justify-content: center;
}
.modal-bg.hidden { display: none; }
.modal-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  width: 660px; max-height: 80vh; display: flex; flex-direction: column;
  transition: background 0.3s;
}
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 13px 16px; border-bottom: 1px solid var(--border);
}
.modal-head h2 { font-size: 14px; color: var(--text); }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 20px; cursor: pointer; line-height: 1; }
.modal-body { padding: 16px; overflow-y: auto; flex: 1; }
.modal-foot { padding: 11px 16px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }
.form-grp { margin-bottom: 11px; }
.form-grp label { display: block; font-size: 11px; color: var(--text-muted); margin-bottom: 3px; }
.form-grp input, .form-grp textarea {
  width: 100%; padding: 6px 8px;
  background: var(--card); border: 1px solid var(--border-lite);
  color: var(--text); border-radius: 5px; font-size: 12px;
}
.form-grp textarea { height: 170px; font-family: monospace; font-size: 11px; resize: vertical; }
.hint { font-size: 10px; color: var(--text-muted); line-height: 1.6; }

/* ── Mobile-only helpers ──────────────────── */
.mobile-only { display: none !important; }

/* ── Mobile layout (< 600px) ─────────────── */
@media (max-width: 599px) {

  /* Toolbar: hide non-essential items → moved to hamburger */
  #zoom-info  { display: none; }
  .seg-ctrl   { display: none; }
  .tbtn       { display: none; }
  .mobile-only { display: flex !important; }

  /* Sidebar: full-width overlay so chart stays usable */
  #sidebar {
    position: absolute;
    z-index: 50;
    height: 100%;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
  }

  /* Age panel: bottom sheet instead of right panel */
  #chart-row { display: block; }   /* disable flex so panel doesn't shrink chart */

  #age-panel {
    position: fixed;
    left: 0; right: 0; bottom: 0; top: auto;
    width: 100% !important;
    height: 0;
    border-left: none !important;
    border-top: none;
    border-radius: 18px 18px 0 0;
    transition: height 0.28s cubic-bezier(.4,0,.2,1), background 0.3s;
    box-shadow: 0 -6px 28px rgba(0,0,0,0.4);
    overflow: hidden;
  }
  #age-panel.open {
    height: 58vh;
    width: 100% !important;
    border-top: 1px solid var(--border);
  }

  /* Drag handle bar */
  #age-panel-head::before {
    content: '';
    display: block;
    width: 36px; height: 4px;
    background: var(--border-lite);
    border-radius: 2px;
    margin: 0 auto 10px;
  }
  #age-panel-head {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 14px;
    position: relative;
  }
  #age-panel-close {
    position: absolute;
    top: 14px; right: 12px;
  }
}