:root {
    --bg: #f4f7fb;
    --panel: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --accent: #1d4ed8;
    --border: #dbeafe;
    --shadow: 0 4px 24px rgba(15, 23, 42, .04);
    --safe: #16a34a;
    --safe-bg: #ecfdf5;
    --safe-border: #86efac;
    --warn: #b45309;
    --warn-bg: #fffbeb;
    --warn-border: #fcd34d;
    --danger: #b91c1c;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --neutral: #64748b;
    --neutral-bg: #f1f5f9;
    --improve: #047857;
    --regress: #b91c1c;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font: 14px/1.55 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.top-nav {
    position: sticky; top: 0; z-index: 5;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #fff;
    padding: 14px 24px;
    display: flex; gap: 16px; align-items: center; justify-content: space-between;
    box-shadow: 0 1px 0 rgba(255,255,255,.05), 0 4px 12px rgba(0,0,0,.08);
}
.top-nav .brand { color: #fff; text-decoration: none; font-weight: 800; letter-spacing: .2px; font-size: 15px; }
.top-nav nav { display: flex; gap: 4px; flex-wrap: wrap; }
.top-nav a {
    color: #cbd5e1; text-decoration: none; padding: 6px 12px; border-radius: 6px;
    transition: background .15s ease, color .15s ease;
}
.top-nav a:hover { color: #fff; background: rgba(255,255,255,.08); }

.container { max-width: 1200px; margin: 24px auto; padding: 0 20px 56px; }

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px;
    margin-bottom: 18px;
    box-shadow: var(--shadow);
}
.card h1 { margin-top: 0; letter-spacing: -.3px; }
.card h2 { margin-top: 0; letter-spacing: -.2px; }
.card h3 { margin-top: 0; }
.muted { color: var(--muted); }

.form { display: grid; gap: 12px; max-width: 720px; }
.form label { display: grid; gap: 6px; }
input, select, textarea, button {
    width: 100%; border: 1px solid #cbd5e1; border-radius: 8px; padding: 10px 12px; font: inherit; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid #93c5fd; border-color: var(--accent); }
button {
    background: var(--accent); color: #fff; border: none; cursor: pointer; width: fit-content; padding: 11px 18px; font-weight: 600; letter-spacing: .15px;
    box-shadow: 0 1px 0 rgba(0,0,0,.04);
}
button:hover { filter: brightness(1.06); }
.error { color: var(--danger); }
.success { color: var(--safe); }

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-top: 12px;
}
.stats.compact { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
.stats article { border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: #fff; }

/* === Score badges === */
.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-top: 10px;
}
.badge-grid.hero {
    grid-template-columns: 1.6fr repeat(auto-fit, minmax(150px, 1fr));
}
.badge {
    position: relative;
    border-radius: 14px; padding: 16px 18px;
    background: var(--neutral-bg);
    border: 1px solid #e2e8f0;
    border-left: 6px solid var(--neutral);
    color: var(--text);
    overflow: hidden;
}
.badge .label { font-size: 11px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); margin-bottom: 6px; font-weight: 700; }
.badge .value { font-size: 38px; font-weight: 800; line-height: 1.05; letter-spacing: -.5px; }
.badge .value small { font-size: 14px; font-weight: 600; color: var(--muted); margin-left: 4px; }
.badge .tag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .5px; padding: 3px 8px; border-radius: 999px; text-transform: uppercase; margin-top: 6px; }
.badge .target { font-size: 11px; color: var(--muted); margin-top: 6px; }
.badge .delta {
    position: absolute; top: 12px; right: 14px;
    font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 999px;
    background: #fff; border: 1px solid #e2e8f0; color: var(--muted);
}
.badge.hero-badge { padding: 20px 24px; }
.badge.hero-badge .value { font-size: 56px; }
.badge.hero-badge .label { font-size: 12px; }

.badge.score-safe   { background: var(--safe-bg);   border-left-color: var(--safe);   border-color: var(--safe-border); }
.badge.score-safe   .tag { background: var(--safe);   color: #fff; }
.badge.score-warn   { background: var(--warn-bg);   border-left-color: var(--warn);   border-color: var(--warn-border); }
.badge.score-warn   .tag { background: var(--warn);   color: #fff; }
.badge.score-danger { background: var(--danger-bg); border-left-color: var(--danger); border-color: var(--danger-border); }
.badge.score-danger .tag { background: var(--danger); color: #fff; }
.badge.score-neutral .tag { background: var(--neutral); color: #fff; }

.delta.score-improve { color: var(--improve); border-color: #bbf7d0; background: #f0fdf4; }
.delta.score-regress { color: var(--regress); border-color: #fecaca; background: #fef2f2; }

/* Legacy small score chips (used in tables, etc.) */
.score-safe   { background: var(--safe-bg);   color: var(--safe);   }
.score-warn   { background: var(--warn-bg);   color: var(--warn);   }
.score-danger { background: var(--danger-bg); color: var(--danger); }
.score-neutral { background: var(--neutral-bg); color: var(--neutral); }
.score-improve { color: var(--improve); }
.score-regress { color: var(--regress); }

td.score-safe, td.score-warn, td.score-danger, td.score-neutral { font-weight: 700; }

.score-card { border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: #fff; border-left-width: 6px; border-left-style: solid; }

/* Word-count progress bar */
.wf-wrap { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; margin-top: 8px; }
.wf-track { height: 12px; border-radius: 999px; background: #e2e8f0; overflow: hidden; }
.wf-fill  { height: 100%; background: linear-gradient(90deg, #16a34a, #22c55e); border-radius: 999px; transition: width .4s ease; }
.wf-fill.under { background: linear-gradient(90deg, #b91c1c, #ef4444); }
.wf-label { font-weight: 700; }

/* Signal table */
.signal-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.signal-table th, .signal-table td { text-align: left; border-bottom: 1px solid var(--border); padding: 8px 10px; }
.signal-table .bar-cell { width: 50%; }
.signal-table .bar { height: 8px; border-radius: 999px; background: #e2e8f0; overflow: hidden; }
.signal-table .bar > span { display: block; height: 100%; background: linear-gradient(90deg, #f59e0b, #dc2626); }

/* Tabs (prompts) */
.tabs { display: flex; gap: 4px; margin: 12px 0 4px; }
.tab-btn { background: #f1f5f9; color: var(--text); border: 1px solid var(--border); padding: 8px 14px; border-radius: 8px; cursor: pointer; width: auto; font-weight: 600; }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { text-align: left; border-bottom: 1px solid var(--border); padding: 10px; vertical-align: top; font-size: 13.5px; }
th { background: #f8fafc; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; font-size: 11.5px; }

.delta { background: #f8fafc; padding: 12px; border: 1px solid var(--border); border-radius: 10px; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.button, a.button {
    background: #0f172a; color: #fff; text-decoration: none; border-radius: 8px; padding: 9px 14px; display: inline-flex; align-items: center; font-weight: 600; font-size: 13px;
}
.button:hover, a.button:hover { background: #1e293b; }

textarea { width: 100%; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; white-space: pre-wrap; min-height: 360px; font-size: 12.5px; }
pre { margin: 8px 0 0; background: #f8fafc; border: 1px solid var(--border); padding: 12px; border-radius: 8px; overflow: auto; font-size: 12.5px; }

/* Trend strip */
.trend { display: flex; gap: 4px; align-items: end; height: 36px; padding: 4px 0; }
.trend .bar { flex: 1; min-width: 6px; background: linear-gradient(180deg, #22c55e, #16a34a); border-radius: 3px 3px 0 0; opacity: .85; }
.trend .bar.warn { background: linear-gradient(180deg, #f59e0b, #b45309); }
.trend .bar.danger { background: linear-gradient(180deg, #ef4444, #b91c1c); }

@media (max-width: 800px) {
    .top-nav { flex-wrap: wrap; row-gap: 8px; padding: 10px 14px; }
    .badge-grid, .stats { grid-template-columns: 1fr 1fr; }
    .badge-grid.hero { grid-template-columns: 1fr; }
    .container { margin-top: 12px; }
    .badge.hero-badge .value { font-size: 44px; }
}
@media (max-width: 480px) {
    .badge-grid, .stats { grid-template-columns: 1fr; }
}