:root {
    --bg: #f7f7f5;
    --card: #ffffff;
    --border: #e2e0db;
    --text: #2b2a27;
    --muted: #767267;
    --accent: #6b8f71;
    --accent-dark: #4f6e55;
    --danger: #b1543f;
    --pain-low: #6b8f71;
    --pain-mid: #d9a441;
    --pain-high: #b1543f;
    --pain-none: #d8d5cd;
    color-scheme: light;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 16px;
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 340px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.login-card h1 { margin: 0 0 8px; font-size: 22px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.login-card input { padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; }
.login-card .error { color: var(--danger); font-size: 13px; margin: 0; }

button, .btn-link {
    cursor: pointer;
    font-family: inherit;
}

.primary, .login-card button {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 600;
}
.primary:hover, .login-card button:hover { background: var(--accent-dark); }

.secondary {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 16px;
    color: var(--text);
    text-decoration: none;
    display: inline-block;
}

.danger {
    background: #fff;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: 8px;
    padding: 10px 16px;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar h1 { font-size: 18px; margin: 0; margin-right: auto; }
.logout { margin-left: auto; color: var(--muted); text-decoration: none; font-size: 13px; }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab-btn {
    background: none;
    border: 1px solid transparent;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--muted);
}
.tab-btn.active { background: var(--bg); color: var(--text); border-color: var(--border); font-weight: 600; }

main { max-width: 900px; margin: 0 auto; padding: 20px 16px 80px; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

fieldset {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px 16px;
    margin: 0 0 16px;
    background: var(--card);
}
legend { padding: 0 6px; font-weight: 600; font-size: 14px; color: var(--text); }

label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 10px;
}

input, select, textarea {
    font-family: inherit;
    font-size: 15px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: #fff;
    color: var(--text);
    width: 100%;
}

textarea { resize: vertical; }

.range-input { padding: 0; }

.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: 1fr 1fr; }
@media (max-width: 640px) {
    .grid.two { grid-template-columns: 1fr; }
}

.entry-datebar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.entry-datebar input[type=date] { width: auto; flex: 1 1 160px; }
.entry-datebar button { padding: 8px 12px; border: 1px solid var(--border); background: #fff; border-radius: 8px; }

.save-status { font-size: 13px; color: var(--accent-dark); margin-left: auto; }

.dyn-rows { display: flex; flex-direction: column; gap: 8px; }
.dyn-row { display: grid; grid-template-columns: 1fr 1fr 1fr 2fr auto; gap: 8px; align-items: center; }
.dyn-row.meal-row { grid-template-columns: 1fr 2fr 1fr auto; }
@media (max-width: 640px) {
    .dyn-row, .dyn-row.meal-row { grid-template-columns: 1fr; }
}
.dyn-row input, .dyn-row select { margin: 0; }
.remove-row-btn { background: none; border: none; color: var(--danger); font-size: 18px; line-height: 1; padding: 4px 8px; }
.add-row-btn { float: right; background: none; border: 1px solid var(--border); border-radius: 6px; padding: 3px 10px; font-size: 13px; font-weight: 400; color: var(--accent-dark); }

.form-actions { display: flex; gap: 10px; justify-content: space-between; margin-top: 8px; }

.wearable-readout { font-size: 14px; color: var(--muted); }

.history-controls { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.history-controls button { padding: 6px 12px; border: 1px solid var(--border); background: #fff; border-radius: 8px; }
#monthLabel { font-weight: 600; }
.legend { display: flex; gap: 12px; margin-left: auto; font-size: 12px; color: var(--muted); }
.legend-item { display: flex; align-items: center; gap: 4px; }
.swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.swatch.p0 { background: var(--pain-low); }
.swatch.p1 { background: var(--pain-mid); }
.swatch.p2 { background: var(--pain-high); }
.swatch.p9 { background: var(--pain-none); }

.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow { font-size: 11px; color: var(--muted); text-align: center; padding-bottom: 4px; }
.cal-day {
    aspect-ratio: 1;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    cursor: pointer;
    background: #fff;
}
.cal-day.empty { visibility: hidden; }
.cal-day.pain-0 { background: var(--pain-none); }
.cal-day.pain-low { background: color-mix(in srgb, var(--pain-low) 35%, white); }
.cal-day.pain-mid { background: color-mix(in srgb, var(--pain-mid) 35%, white); }
.cal-day.pain-high { background: color-mix(in srgb, var(--pain-high) 35%, white); }
.cal-day.is-today { border-color: var(--accent); border-width: 2px; }
.cal-day .cal-num { font-weight: 600; }

.chart-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 16px;
}
.chart-card h2 { font-size: 14px; margin: 0 0 10px; }
.stats-controls { margin-bottom: 14px; }
.stats-controls select { width: auto; }
.hint { font-size: 12px; color: var(--muted); margin: 0 0 10px; }

#correlationTable table { width: 100%; border-collapse: collapse; font-size: 13px; }
#correlationTable th, #correlationTable td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); }

.inline-check { flex-direction: row; align-items: center; gap: 6px; }
.inline-check input { width: auto; }

#pwStatus, #importStatus { font-size: 13px; color: var(--muted); }