*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #111827;
    --bg-surface: #1f2937;
    --bg-hover: #374151;
    --border: #374151;
    --text: #f9fafb;
    --text-muted: #9ca3af;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #10b981;
    --radius: 8px;
    --radius-sm: 4px;
}

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

#app {
    height: 100%;
    overflow: hidden;
}

/* ── Views ── */
.view {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.hidden {
    display: none !important;
}

/* ── Header ── */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 12px;
}

.app-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.view-title {
    flex: 1;
    font-size: 17px;
    font-weight: 600;
    text-align: center;
    outline: none;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    cursor: text;
}

.view-title:focus {
    background: var(--bg-surface);
    box-shadow: 0 0 0 2px var(--primary);
}

.header-actions {
    display: flex;
    gap: 8px;
}

/* ── Buttons ── */
.btn {
    padding: 7px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--bg-hover); }

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover { color: var(--text); background: var(--bg-hover); }

.btn-danger {
    background: transparent;
    color: var(--danger);
    padding: 4px 8px;
    font-size: 12px;
}

.btn-danger:hover { background: rgba(239,68,68,.15); }

/* ── Form ── */
.input {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    padding: 7px 12px;
    font-size: 13px;
    outline: none;
    width: 100%;
    transition: border-color 0.15s;
}

.input:focus { border-color: var(--primary); }

.select {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    padding: 7px 10px;
    font-size: 13px;
    outline: none;
    cursor: pointer;
    flex-shrink: 0;
}

.select:focus { border-color: var(--primary); }

/* ── Decision list ── */
.decision-list {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.decision-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.decision-card:hover { border-color: var(--primary); background: var(--bg-hover); }

.decision-card-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.decision-card-title {
    font-size: 15px;
    font-weight: 600;
}

.decision-card-meta {
    color: var(--text-muted);
    font-size: 12px;
}

.decision-card-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    gap: 8px;
}

.empty-state p { font-size: 16px; }
.empty-state .hint { font-size: 13px; }

/* ── Edit view ── */
.edit-columns {
    flex: 1;
    display: flex;
    gap: 0;
    overflow: hidden;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    overflow: hidden;
    border-right: 1px solid var(--border);
}

.panel:last-child { border-right: none; }

.panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.tag-list, .criteria-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.tag-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
    font-size: 14px;
}

.criterion-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
}

.criterion-item-left { display: flex; align-items: center; gap: 10px; }
.criterion-item-name { font-size: 14px; }
.criterion-item-weight {
    background: var(--primary);
    color: #fff;
    border-radius: 20px;
    padding: 1px 8px;
    font-size: 11px;
    font-weight: 600;
}

.add-row {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* ── Score matrix ── */
.table-wrap {
    flex: 1;
    overflow: auto;
    padding: 20px;
}

.score-table {
    border-collapse: collapse;
    width: 100%;
    min-width: 400px;
}

.score-table th, .score-table td {
    padding: 10px 16px;
    border: 1px solid var(--border);
    text-align: center;
    white-space: nowrap;
}

.score-table th {
    background: var(--bg-surface);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
}

.score-table th:first-child { text-align: left; }
.score-table td:first-child { text-align: left; font-weight: 500; }

.score-table tr:hover td { background: rgba(255,255,255,.02); }

.score-select {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 4px 8px;
    font-size: 13px;
    cursor: pointer;
    outline: none;
    min-width: 70px;
}

.score-select:focus { border-color: var(--primary); }

/* ── Results ── */
.results-list {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.result-rank {
    font-size: 24px;
    font-weight: 700;
    width: 36px;
    text-align: center;
    flex-shrink: 0;
    color: var(--text-muted);
}

.result-rank.rank-1 { color: #f59e0b; }
.result-rank.rank-2 { color: #9ca3af; }
.result-rank.rank-3 { color: #cd7c2f; }

.result-info { flex: 1; }

.result-option {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.result-bar-bg {
    background: var(--bg-hover);
    border-radius: 4px;
    height: 6px;
    overflow: hidden;
}

.result-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.6s ease;
}

.result-score {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
    min-width: 40px;
    text-align: right;
}

/* ── Modal ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    width: 380px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ── Settings form ── */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.form-hint {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

.settings-test-result {
    font-size: 12px;
    padding: 8px 12px;
    border-radius: var(--radius);
    text-align: center;
}

.settings-test-result.success {
    background: rgba(16,185,129,.12);
    color: var(--success);
    border: 1px solid rgba(16,185,129,.3);
}

.settings-test-result.error {
    background: rgba(239,68,68,.1);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,.25);
}

/* ── AI ── */
.btn-ai {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    font-size: 12px;
    padding: 6px 12px;
}

.btn-ai:hover { opacity: .85; }
.btn-ai:disabled { opacity: .45; cursor: default; }

.panel-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.panel-title-row .panel-title { margin-bottom: 0; }

.ai-panel {
    background: rgba(99,102,241,.08);
    border: 1px solid rgba(99,102,241,.3);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
    max-height: 260px;
    overflow-y: auto;
}

.ai-loading {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 13px;
    padding: 8px 0;
}

@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
    width: 14px; height: 14px;
    border: 2px solid rgba(99,102,241,.3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .7s linear infinite;
    flex-shrink: 0;
}

.ai-suggestion-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.ai-suggestion-info { flex: 1; }
.ai-suggestion-name { font-size: 13px; font-weight: 600; margin-bottom: 2px; }
.ai-suggestion-reason { font-size: 12px; color: var(--text-muted); }

.ai-score-row {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
    font-size: 12px;
}

.ai-score-header { font-weight: 600; margin-bottom: 2px; }
.ai-score-reason { color: var(--text-muted); }

.ai-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.ai-apply-all {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 3px 10px;
    font-size: 11px;
    cursor: pointer;
}

.ai-apply-all:hover { background: var(--primary-hover); }

.ai-analysis-panel {
    margin: 0 20px 20px;
    background: rgba(99,102,241,.08);
    border: 1px solid rgba(99,102,241,.3);
    border-radius: var(--radius);
    padding: 16px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text);
    flex-shrink: 0;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }