/* ===== Design System ===================================================== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;600&family=DM+Mono:wght@400;500&family=Inter:wght@400;500;600&display=swap');

:root {
  --navy:   #1a2744;
  --navy-2: #243258;
  --blue:   #2d72d2;
  --blue-l: #dbeafe;
  --teal:   #0d9488;
  --teal-l: #ccfbf1;
  --amber:  #d97706;
  --amber-l:#fef3c7;
  --red:    #dc2626;
  --red-l:  #fee2e2;
  --green:  #16a34a;
  --green-l:#dcfce7;
  --bg:     #f0f4fa;
  --surface:#ffffff;
  --line:   #dde3ef;
  --line-2: #c8d2e6;
  --text:   #1e293b;
  --muted:  #64748b;
  --muted-2:#94a3b8;
  --font-body:  'Inter', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
  --font-mono:  'DM Mono', monospace;
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px;
  --shadow-sm: 0 1px 4px rgba(26,39,68,.07);
  --shadow-md: 0 4px 20px rgba(26,39,68,.09);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.6; }

/* ===== Header ============================================================= */
.page-header { background: var(--navy); color: #fff; padding: 28px 36px 24px; border-bottom: 3px solid var(--blue); }
.page-header h1 { font-family: var(--font-serif); font-size: 24px; font-weight: 600; }
.page-header .subtitle { margin-top: 4px; font-size: 13px; color: #a8bbd6; }

main { padding: 24px 32px 60px; max-width: 1400px; margin: 0 auto; }

/* ===== Step bar =========================================================== */
.steps-bar { display:flex; align-items:center; margin-bottom:28px; background:var(--surface); border:1px solid var(--line); border-radius:var(--r-lg); overflow:hidden; box-shadow:var(--shadow-sm); }
.step-item { flex:1; display:flex; align-items:center; gap:10px; padding:12px 16px; font-size:13px; color:var(--muted); border-right:1px solid var(--line); }
.step-item:last-child { border-right:none; }
.step-num { width:26px; height:26px; border-radius:50%; background:var(--line); color:var(--muted); font-weight:600; font-size:12px; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.step-item.active .step-num { background:var(--blue); color:#fff; }
.step-item.active { color:var(--text); font-weight:500; }
.step-item.done .step-num { background:var(--teal); color:#fff; }
.step-item.done { color:var(--text); }

/* Loading spinner for AI suggest area */
.suggest-loading { grid-column: 1 / -1; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:56px 24px; gap:16px; color:var(--muted); font-size:14px; }
.suggest-loading .spinner { width:40px; height:40px; border:3px solid var(--line); border-top-color:var(--teal); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

/* ===== Intro ============================================================== */
.intro-card { background:var(--navy-2); color:#c8d8f0; border-radius:var(--r-md); padding:16px 20px; margin-bottom:20px; font-size:13.5px; line-height:1.8; border-left:4px solid var(--blue); }
.intro-card strong { color:#fff; }
.toggle-intro { float:right; background:transparent; border:1px solid #4a6fa5; color:#a8bbd6; border-radius:var(--r-sm); padding:2px 10px; font-size:12px; cursor:pointer; }
.intro-body { margin-top:10px; }
.intro-body.hidden { display:none; }
.intro-body dl { display:grid; grid-template-columns:max-content 1fr; gap:4px 12px; margin-top:8px; }
.intro-body dt { font-weight:600; color:#e0eaff; white-space:nowrap; }

/* ===== Cards ============================================================== */
.card { background:var(--surface); border:1px solid var(--line); border-radius:var(--r-md); padding:20px; margin-bottom:20px; box-shadow:var(--shadow-sm); }
.card-head { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px; margin-bottom:14px; }
.card-head h2 { font-family:var(--font-serif); font-size:18px; font-weight:600; display:flex; align-items:center; gap:10px; }
.controls-card { border-top:3px solid var(--navy); }
.step-badge { display:inline-flex; align-items:center; justify-content:center; width:28px; height:28px; border-radius:50%; background:var(--navy); color:#fff; font-size:13px; font-weight:700; font-family:var(--font-body); flex-shrink:0; }
.help-note { font-size:13px; color:var(--muted); background:var(--bg); border-radius:var(--r-sm); padding:8px 12px; margin-bottom:14px; border-left:3px solid var(--line-2); line-height:1.7; }

/* ===== Buttons ============================================================ */
.btn-row { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:10px; }
.btn-row + .btn-row { padding-top:10px; border-top:1px dashed var(--line); }
button, .file-btn { font-family:var(--font-body); font-size:13.5px; border-radius:var(--r-sm); padding:8px 14px; border:1px solid var(--line-2); background:var(--surface); color:var(--text); cursor:pointer; transition:background .12s,border-color .12s; white-space:nowrap; }
button:hover, .file-btn:hover { background:var(--bg); border-color:var(--muted-2); }
button.primary { background:var(--blue); color:#fff; border-color:var(--blue); }
button.primary:hover { background:#1e5db8; }
button.success { background:var(--teal); color:#fff; border-color:var(--teal); }
button.success:hover { background:#0b7a70; }
button.danger { background:var(--red); color:#fff; border-color:var(--red); }
button.ghost { background:transparent; border-color:transparent; color:var(--muted); padding:6px 10px; }
button.ghost:hover { background:var(--bg); }
button.sm { padding:5px 10px; font-size:12.5px; }
button:disabled { opacity:.45; cursor:not-allowed; }
.file-btn { display:inline-flex; align-items:center; gap:6px; position:relative; overflow:hidden; }
.file-btn input[type="file"] { position:absolute; inset:0; opacity:0; cursor:pointer; font-size:0; }

/* ===== Status bar ========================================================= */
.status-bar { font-size:13px; padding:8px 12px; border-radius:var(--r-sm); min-height:36px; display:flex; align-items:center; gap:8px; color:var(--muted); background:var(--bg); border:1px solid transparent; margin-top:10px; transition:background .2s,color .2s; }
.status-bar.info  { background:var(--blue-l);  color:#1e40af; border-color:#bfdbfe; }
.status-bar.ok    { background:var(--green-l); color:#15803d; border-color:#bbf7d0; }
.status-bar.error { background:var(--red-l);   color:#991b1b; border-color:#fecaca; }
.status-bar.warn  { background:var(--amber-l); color:#92400e; border-color:#fde68a; }
.spinner { width:14px; height:14px; border:2px solid currentColor; border-top-color:transparent; border-radius:50%; animation:spin .6s linear infinite; flex-shrink:0; }
@keyframes spin { to { transform:rotate(360deg); } }

/* ===== AI Assist card ===================================================== */
.ai-assist-card { border-top:3px solid var(--teal); }
.ai-assist-grid { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
@media (max-width:900px) { .ai-assist-grid { grid-template-columns:1fr; } }
.assist-label { font-size:13.5px; font-weight:600; color:var(--navy); margin-bottom:10px; }

/* ===== Drop zone ========================================================== */
.drop-zone { border:2px dashed var(--line-2); border-radius:var(--r-md); background:var(--bg); cursor:pointer; transition:border-color .15s,background .15s; position:relative; min-height:130px; display:flex; align-items:center; justify-content:center; }
.drop-zone:hover, .drop-zone.drag-over { border-color:var(--teal); background:var(--teal-l); }
.drop-inner { text-align:center; padding:20px; pointer-events:none; }
.drop-icon { font-size:32px; margin-bottom:6px; }
.drop-main { font-size:14px; font-weight:600; color:var(--text); margin-bottom:2px; }
.drop-sub  { font-size:12px; color:var(--muted); }
.drop-zone input[type="file"] { position:absolute; inset:0; opacity:0; cursor:pointer; width:100%; height:100%; }
.drop-zone.has-file { border-color:var(--teal); background:var(--teal-l); }

/* ===== Attribute proposals ================================================ */
.proposals-head { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:10px; margin-top:20px; padding-top:16px; border-top:2px dashed var(--line-2); margin-bottom:14px; }
.proposals-head h3 { font-size:16px; font-family:var(--font-serif); font-weight:600; }
.proposals-note { font-size:12.5px; color:var(--muted); }
.attr-proposals-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(260px, 1fr)); gap:12px; }
.attr-proposal-card { border:1px solid var(--teal-l); border-radius:var(--r-md); padding:14px; background:#fafffe; display:flex; flex-direction:column; gap:8px; transition:border-color .15s; }
.attr-proposal-card:hover { border-color:var(--teal); }
.attr-proposal-card.adopted { opacity:.5; background:var(--green-l); }
.proposal-head { display:flex; align-items:center; gap:8px; }
.proposal-desc { font-size:13px; color:var(--text); line-height:1.6; }
.proposal-kw   { font-size:12px; color:var(--muted); font-family:var(--font-mono); word-break:break-all; overflow-wrap:break-word; }

/* ===== Attributes table =================================================== */
.table-wrap { overflow:auto; }
table { width:100%; border-collapse:collapse; font-size:13.5px; }
th { background:#f8fafc; border:1px solid var(--line); padding:8px 10px; text-align:left; font-weight:600; font-size:12.5px; color:var(--muted); position:sticky; top:0; z-index:1; white-space:nowrap; }
td { border:1px solid var(--line); padding:6px 8px; vertical-align:middle; background:#fff; }
tr:hover td { background:#fafbff; }
td.center { text-align:center; }
td.mono { font-family:var(--font-mono); font-size:13px; }
td.matrix-on { background:var(--teal-l) !important; }
input.id-error { border-color:var(--red) !important; box-shadow:0 0 0 2px #fecaca; }
.err-msg { color:var(--red); font-size:12px; margin-top:4px; }

/* ===== Form inputs ======================================================== */
input[type="text"], textarea, select { width:100%; border:1px solid #cbd5e1; border-radius:var(--r-sm); padding:7px 10px; font:inherit; font-size:13.5px; background:#fff; color:var(--text); transition:border-color .12s,box-shadow .12s; }
input[type="text"]:focus, textarea:focus, select:focus { outline:none; border-color:var(--blue); box-shadow:0 0 0 3px rgba(45,114,210,.12); }
textarea { resize:vertical; }
label.field { display:block; }
label.field > .lbl { display:flex; align-items:center; gap:5px; font-size:12.5px; font-weight:600; color:var(--muted); margin-bottom:4px; }
label.field > .lbl .tip { font-size:11px; background:var(--muted-2); color:#fff; border-radius:99px; width:15px; height:15px; display:inline-flex; align-items:center; justify-content:center; cursor:help; flex-shrink:0; }

/* ===== Items grid (全幅・2カラムカード配置) ================================= */
.items-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-height: 720px;
  overflow-y: auto;
  padding-right: 4px;
}
@media (max-width: 900px) { .items-grid { grid-template-columns: 1fr; } }

/* ===== Item cards ========================================================= */
.item-card { border:1px solid var(--line); border-radius:var(--r-md); padding:16px; background:#fbfdff; height:fit-content; }
.item-card-head { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:14px; }
.item-title { font-family:var(--font-serif); font-size:15px; font-weight:600; }
.item-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.item-grid .span-2 { grid-column:1 / -1; }

/* ===== Matrix ============================================================= */
.attr-pill { display:inline-block; background:var(--blue-l); color:#1e40af; border-radius:99px; padding:2px 8px; font-size:11.5px; font-weight:600; font-family:var(--font-mono); }
input[type="checkbox"] { width:16px; height:16px; accent-color:var(--teal); cursor:pointer; }
#matrixTable { min-width: 500px; }

/* ===== AI Suggestions ===================================================== */
.suggestions-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(300px, 1fr)); gap:14px; margin-top:4px; }
.sugg-card { border:1px solid var(--line); border-radius:var(--r-md); padding:16px; background:#fcfdff; display:flex; flex-direction:column; gap:10px; }
.sugg-card h3 { font-family:var(--font-mono); font-size:15px; font-weight:500; color:var(--navy); }
.conf-badge { display:inline-flex; align-items:center; gap:4px; border-radius:99px; padding:2px 10px; font-size:12px; font-weight:600; }
.conf-高 { background:var(--green-l); color:#15803d; }
.conf-中 { background:var(--amber-l); color:var(--amber); }
.conf-低 { background:var(--red-l);   color:var(--red); }
.sugg-section { font-size:12.5px; }
.sugg-section strong { font-size:12px; color:var(--muted); display:block; margin-bottom:3px; }
.attr-tag { display:inline-flex; align-items:center; background:var(--teal-l); color:#115e59; border-radius:6px; padding:2px 8px; margin:2px; font-size:12.5px; font-family:var(--font-mono); }
.attr-tag.secondary { background:var(--blue-l); color:#1e40af; }
.rationale { font-size:12.5px; color:var(--muted); line-height:1.6; border-top:1px solid var(--line); padding-top:8px; }
.mode-badge { display:inline-flex; align-items:center; gap:5px; font-size:12px; padding:3px 10px; border-radius:99px; }
.mode-gemini    { background:#e0f2fe; color:#0369a1; }
.mode-heuristic { background:var(--amber-l); color:var(--amber); }

/* ===== Stale suggestions warning ========================================== */
.sugg-stale-banner {
  grid-column: 1 / -1;
  background: var(--amber-l);
  border: 1px solid #fde68a;
  border-radius: var(--r-sm);
  padding: 8px 14px;
  font-size: 13px;
  color: #92400e;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===== Empty states ======================================================= */
.empty-state { grid-column: 1 / -1; text-align:center; color:var(--muted-2); padding:40px 20px; font-size:14px; }
.empty-state .icon { font-size:36px; margin-bottom:8px; }

/* ===== Responsive ========================================================= */
@media (max-width:700px) {
  main { padding:16px; }
  .page-header { padding:20px; }
  .item-grid { grid-template-columns:1fr; }
  .item-grid .span-2 { grid-column:1; }
  .items-grid { grid-template-columns: 1fr; }
}

/* ===== Export section ===================================================== */
.export-card { border-top: 3px solid var(--navy); }
.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 900px) { .export-grid { grid-template-columns: 1fr; } }

.export-group-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.export-btns {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.export-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: background .12s, border-color .12s, transform .08s;
}
.export-btn:hover {
  background: var(--bg);
  border-color: var(--muted-2);
  transform: translateY(-1px);
}
.export-icon {
  font-size: 20px;
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}
.export-name {
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 13.5px;
  flex-shrink: 0;
}
.export-desc {
  font-size: 12.5px;
  color: var(--muted);
  margin-left: auto;
  text-align: right;
}
.export-btn-highlight {
  border-color: var(--teal);
  background: var(--teal-l);
}
.export-btn-highlight:hover { background: #b2f5ea; }
.export-btn-highlight .export-name { color: #0f766e; }
.export-btn-r {
  border-color: #1d3461;
  background: #eef1f8;
}
.export-btn-r:hover { background: #dde4f0; }
.export-btn-r .export-name { color: #1d3461; }
.export-btn-r .export-icon { font-weight: 800; color: #1d3461; }

/* ===== AI generate button in card head =================================== */
.ai-gen-btn {
  font-size: 14px;
  padding: 9px 18px;
  box-shadow: 0 2px 8px rgba(45,114,210,.25);
}
.ai-gen-btn:hover { box-shadow: 0 4px 14px rgba(45,114,210,.35); }

/* ===== Apply suggestion feedback ========================================= */
@keyframes rowFlash {
  0%   { background: var(--teal-l); }
  50%  { background: #84e4d4; }
  100% { background: transparent; }
}
.matrix-row-flash td { animation: rowFlash 0.8s ease; }

.apply-btn-done {
  background: var(--green) !important;
  border-color: var(--green) !important;
  color: #fff !important;
  pointer-events: none;
}