:root {
    --bg: #f4f1ea;
    --surface: #ffffff;
    --text: #1f2a2a;
    --text-muted: #6b7570;
    --border: #e3ddd1;
    --accent: #2f6f6b;
    --accent-text: #ffffff;
    --danger: #b3463f;
    --success: #2f7a4f;
    --radius: 14px;

    --c-food: #c77b3c;
    --c-symptom: #b3463f;
    --c-mood: #7a5fb0;
    --c-sleep: #3b5aa0;
    --c-bowel: #8a7a3f;
    --c-activity: #2f8a5e;
    --c-body: #2f6f6b;
    --c-note: #6b7570;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14181a;
        --surface: #1d2326;
        --text: #eef2f0;
        --text-muted: #9aa5a1;
        --border: #2b3236;
        --accent: #4fb3ab;
        --accent-text: #0e1414;
    }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.4;
}

a { color: var(--accent); text-decoration: none; }

main { max-width: 480px; margin: 0 auto; padding: 0 16px 48px; }

/* --- Auth --- */
.auth-page { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 24px; max-width: none; }
.auth-card { background: var(--surface); border-radius: var(--radius); padding: 32px 24px; width: 100%; max-width: 360px; border: 1px solid var(--border); }
.brand { text-align: center; color: var(--accent); margin: 0 0 24px; font-size: 28px; }
.auth-switch { text-align: center; margin-top: 16px; color: var(--text-muted); }

/* --- Forms --- */
label { display: block; font-weight: 600; margin: 16px 0 6px; font-size: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=time], input[type=datetime-local], select, textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    font-size: 16px;
}
textarea { resize: vertical; }
.checkbox-row { display: flex; align-items: center; gap: 10px; font-weight: 400; }
.checkbox-row input { width: 20px; height: 20px; }
.field-label { font-weight: 600; margin: 18px 0 8px; font-size: 14px; }

.btn {
    display: inline-block;
    border: none;
    border-radius: 999px;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-block { width: 100%; margin-top: 20px; }
.btn-small { padding: 8px 14px; font-size: 14px; background: var(--border); color: var(--text); }

.alert { padding: 12px 14px; border-radius: 10px; margin: 16px 0; font-size: 14px; }
.alert-error { background: rgba(179, 70, 63, 0.12); color: var(--danger); }
.alert-success { background: rgba(47, 122, 79, 0.12); color: var(--success); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin: 20px 0; }
.card-form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.card h2 { margin-top: 0; }
.prose p { margin: 0 0 14px; }

/* --- Page header --- */
.page-header { display: flex; align-items: center; gap: 14px; padding: 20px 0 12px; }
.page-header h1 { margin: 0; font-size: 20px; }
.back-link { color: var(--text-muted); font-weight: 600; white-space: nowrap; }

/* --- Today header --- */
.today-header { display: flex; align-items: center; gap: 10px; padding: 18px 0 14px; position: sticky; top: 0; background: var(--bg); z-index: 10; }
.day-nav { font-size: 20px; padding: 8px 12px; color: var(--text); }
.day-label { flex: 1; text-align: center; font-size: 16px; }
.today-jump { display: block; font-size: 12px; color: var(--accent); }
.menu-toggle { background: none; border: none; font-size: 22px; color: var(--text); padding: 8px; cursor: pointer; }

.menu { display: none; flex-direction: column; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px; margin-bottom: 16px; }
.menu.open { display: flex; }
.menu a { padding: 12px 14px; border-radius: 8px; color: var(--text); }
.menu a:hover { background: var(--bg); }

/* --- Log grid --- */
.log-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 24px; }
.log-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 18px 8px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    min-height: 84px;
    text-align: center;
}
.log-icon { font-size: 26px; }
.log-label { font-size: 13px; font-weight: 600; }
.log-btn-food { border-color: var(--c-food); }
.log-btn-symptom { border-color: var(--c-symptom); }
.log-btn-mood { border-color: var(--c-mood); }
.log-btn-sleep { border-color: var(--c-sleep); }
.log-btn-bowel { border-color: var(--c-bowel); }
.log-btn-activity { border-color: var(--c-activity); }
.log-btn-body { border-color: var(--c-body); }
.log-btn-note { border-color: var(--c-note); }

/* --- Timeline --- */
.filter-chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 10px; margin-bottom: 8px; }
.chip { flex: 0 0 auto; padding: 8px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: 13px; white-space: nowrap; }
.chip-active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-toggle { display: inline-flex; align-items: center; padding: 8px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); font-size: 14px; font-weight: 400; margin: 0; }
.chip-toggle input { margin-right: 6px; }
.chip-toggle-row { margin-bottom: 8px; }

.empty-state { color: var(--text-muted); text-align: center; padding: 32px 0; }

.timeline-list { list-style: none; padding: 0; margin: 0; }
.timeline-item { border-bottom: 1px solid var(--border); }
.timeline-item a { display: flex; align-items: center; gap: 12px; padding: 12px 4px; color: var(--text); }
.timeline-time { font-size: 13px; color: var(--text-muted); width: 64px; flex: none; }
.timeline-icon { font-size: 18px; }
.timeline-summary { flex: 1; font-size: 15px; }

/* --- Log form bits --- */
.food-item-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.scale-row { display: flex; gap: 8px; }
.scale-btn { flex: 1; text-align: center; padding: 14px 0; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); font-weight: 600; margin: 0; }
.scale-btn input { display: none; }
.scale-btn:has(input:checked) { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

.bristol-grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
.bristol-card { display: flex; flex-direction: column; padding: 12px 14px; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); margin: 0; }
.bristol-card input { display: none; }
.bristol-card:has(input:checked) { border-color: var(--accent); background: rgba(47, 111, 107, 0.08); }
.bristol-num { font-weight: 600; }
.bristol-desc { font-size: 13px; color: var(--text-muted); }

.delete-form { margin-top: 24px; }

/* --- Admin / Settings tables --- */
.simple-table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 14px; }
.simple-table th, .simple-table td { text-align: left; padding: 8px 4px; border-bottom: 1px solid var(--border); }
.option-list { list-style: none; padding: 0; margin: 8px 0; }
.option-list li { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.option-hidden { opacity: 0.5; }
.inline-form { display: flex; gap: 8px; margin-bottom: 20px; }
.inline-form input { flex: 1; }
.list-title { margin: 16px 0 4px; font-size: 15px; }

@media (min-width: 540px) {
    .log-grid { grid-template-columns: 1fr 1fr 1fr 1fr; }
}