@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

  :root {
    --bg: #1b1826;
    --surface: #241f30;
    --surface-2: #2d2739;
    --surface-3: #362f45;
    --border: rgba(228, 222, 236, 0.09);
    --border-strong: rgba(228, 222, 236, 0.16);
    --text: #e4deec;
    --text-dim: #9c93ac;
    --text-faint: #6e6580;
    --accent: #a996d6;
    --accent-dim: #766a94;

    --grade1: #7fa88f; /* minimal */
    --grade2: #a3ab6d; /* mild */
    --grade3: #d1a25a; /* moderate */
    --grade4: #cf7f7f; /* severe */

    --radius: 14px;
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', Menlo, monospace;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
  }

  .app {
    position: relative;
    max-width: 880px;
    margin: 0 auto;
    padding: 40px 24px 80px;
  }

  /* ---------- Header ---------- */
  #appRoot header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 36px;
    flex-wrap: wrap;
  }

  .title-block h1 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 34px;
    margin: 0 0 4px;
    letter-spacing: -0.01em;
  }

  .title-block p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
  }

  .btn {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 14px;
    border-radius: 999px;
    padding: 12px 22px;
    border: none;
    cursor: pointer;
    transition: transform 0.12s ease, background 0.12s ease;
  }
  .btn:active { transform: scale(0.97); }

  .btn-primary {
    background: var(--accent);
    color: #1b1826;
  }
  .btn-primary:hover { background: #b8a6e0; }

  .btn-ghost {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border-strong);
  }
  .btn-ghost:hover { color: var(--text); border-color: var(--accent-dim); }

  .btn-danger-ghost {
    background: transparent;
    color: var(--grade4);
    border: 1px solid rgba(207, 127, 127, 0.35);
  }
  .btn-danger-ghost:hover { background: rgba(207, 127, 127, 0.1); }

  /* ---------- Month nav ---------- */
  .month-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
  }

  .month-nav .month-label {
    font-family: var(--font-display);
    font-size: 20px;
    letter-spacing: 0.01em;
  }

  .nav-btns { display: flex; gap: 8px; }

  .icon-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text-dim);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .icon-btn:hover { color: var(--text); border-color: var(--accent-dim); }

  /* ---------- Calendar ---------- */
  .calendar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
  }

  .weekdays, .days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
  }

  .weekdays {
    margin-bottom: 8px;
  }

  .weekdays span {
    text-align: center;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-faint);
    font-family: var(--font-mono);
  }

  .day-cell {
    position: relative;
    aspect-ratio: 1;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-dim);
    background: transparent;
    border: 1px solid transparent;
    transition: border-color 0.15s ease, background 0.15s ease;
  }

  .day-cell.empty { cursor: default; }
  .day-cell.empty:hover { border-color: transparent; }

  .day-cell:not(.empty):hover {
    border-color: var(--border-strong);
    background: var(--surface-2);
  }

  .day-cell.today {
    color: var(--text);
    font-weight: 600;
  }
  .day-cell.today::after {
    content: '';
    position: absolute;
    bottom: 5px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
  }

  .day-cell .day-num { position: relative; z-index: 2; }

  /* Aura ring signature element — echoes the visual aura symptom */
  .aura {
    position: absolute;
    inset: 0;
    border-radius: 10px;
    pointer-events: none;
  }
  .aura::before, .aura::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    margin: auto;
  }
  .aura::before {
    width: 78%;
    height: 78%;
    box-shadow: 0 0 0 1px var(--ring-color, var(--accent));
    opacity: 0.55;
  }
  .aura::after {
    width: 100%;
    height: 100%;
    box-shadow: 0 0 0 1px var(--ring-color, var(--accent));
    opacity: 0.22;
  }
  .day-cell.has-entry .day-num { color: var(--text); }
  .day-cell.has-entry:hover .aura::before,
  .day-cell.has-entry:hover .aura::after {
    animation: pulse 1.4s ease-in-out infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.85; transform: scale(1.08); }
  }

  .count-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 9px;
    color: var(--bg);
    background: var(--ring-color, var(--accent));
    width: 13px;
    height: 13px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
  }

  /* ---------- Legend ---------- */
  .legend {
    display: flex;
    gap: 16px;
    margin-top: 18px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-dim);
  }
  .legend-item { display: flex; align-items: center; gap: 6px; }
  .legend-dot { width: 8px; height: 8px; border-radius: 50%; }

  /* ---------- Summary ---------- */
  .summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 24px;
  }
  .summary-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
  }
  .summary-card .label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-faint);
    margin-bottom: 8px;
  }
  .summary-card .value {
    font-family: var(--font-display);
    font-size: 26px;
  }
  .summary-card .sub {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 4px;
  }

  #appRoot footer {
    margin-top: 32px;
    font-size: 12px;
    color: var(--text-faint);
    line-height: 1.6;
  }

  /* ---------- Modal ---------- */
  .overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 8, 16, 0.6);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 16px;
    overflow-y: auto;
    z-index: 100;
  }
  .overlay.hidden { display: none; }

  .modal {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    max-width: 560px;
    width: 100%;
    padding: 28px;
  }

  .modal h2 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 22px;
    margin: 0 0 4px;
  }
  .modal .modal-sub {
    color: var(--text-dim);
    font-size: 13px;
    margin: 0 0 22px;
  }

  .field { margin-bottom: 18px; }
  .field label {
    display: block;
    font-size: 13px;
    color: var(--text);
    margin-bottom: 6px;
    line-height: 1.4;
  }
  .field .hint {
    display: block;
    font-size: 12px;
    color: var(--text-faint);
    margin-top: 4px;
  }

  input[type="date"], input[type="number"], input[type="email"], input[type="password"], input[type="text"], input[type="tel"], textarea {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
  }
  input[type="date"]:focus, input[type="number"]:focus, input[type="email"]:focus, input[type="password"]:focus, input[type="text"]:focus, input[type="tel"]:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
  }
  textarea { font-family: var(--font-body); resize: vertical; min-height: 60px; }

  .stepper {
    display: flex;
    align-items: stretch;
    gap: 8px;
  }
  .stepper input { text-align: center; flex: 1; }
  .stepper button {
    width: 40px;
    background: var(--surface-3);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px;
    cursor: pointer;
  }
  .stepper button:hover { border-color: var(--accent-dim); }

  .slider-row {
    display: flex;
    align-items: center;
    gap: 14px;
  }
  input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
  }
  .slider-value {
    font-family: var(--font-mono);
    font-size: 16px;
    width: 28px;
    text-align: center;
  }
  .slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-faint);
    margin-top: 4px;
  }

  .q-group-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin: 24px 0 12px;
    padding-top: 4px;
    border-top: 1px solid var(--border);
  }
  .q-group-title:first-of-type { border-top: none; margin-top: 0; }

  .modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 26px;
  }

  /* ---------- Day detail list ---------- */
  .entry-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 10px;
  }
  .entry-card .entry-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
  }
  .entry-grade {
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 3px 8px;
    border-radius: 999px;
    color: var(--bg);
    font-weight: 600;
  }
  .entry-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 12px;
    font-size: 12px;
    color: var(--text-dim);
  }
  .entry-detail-grid .k { color: var(--text-faint); }
  .entry-notes {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text);
    font-style: italic;
  }
  .entry-actions {
    margin-top: 10px;
    display: flex;
    justify-content: flex-end;
  }

  .empty-state {
    text-align: center;
    padding: 30px 10px;
    color: var(--text-dim);
    font-size: 14px;
  }

  @media (max-width: 520px) {
    .summary { grid-template-columns: 1fr; }
    .day-cell { font-size: 11px; }
  }

  /* ---------- Auth screen ---------- */
  .hidden { display: none !important; }

  .auth-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
  }

  .auth-card {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    padding: 32px 28px;
    width: 100%;
    max-width: 380px;
  }

  .auth-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 26px;
    margin: 0 0 4px;
    text-align: center;
  }

  .auth-sub {
    color: var(--text-dim);
    font-size: 13px;
    margin: 0 0 22px;
    text-align: center;
  }

  .auth-tabs {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    padding: 3px;
    margin-bottom: 20px;
  }

  .auth-tab {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    padding: 8px 0;
    border-radius: 999px;
    cursor: pointer;
  }

  .auth-tab.active {
    background: var(--accent);
    color: #1b1826;
  }

  .auth-message {
    font-size: 12.5px;
    min-height: 18px;
    margin: 4px 0 14px;
    line-height: 1.4;
  }
  .auth-message.error { color: var(--grade4); }
  .auth-message.success { color: var(--grade1); }

  .auth-test-link {
    display: block;
    width: 100%;
    text-align: center;
    background: none;
    border: none;
    color: var(--text-faint);
    font-family: var(--font-body);
    font-size: 12px;
    margin-top: 14px;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
  }
  .auth-test-link:hover { color: var(--text-dim); }

  /* ---------- Header user bar ---------- */
  .header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
  }

  .user-bar {
    position: absolute;
    top: 14px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12.5px;
    color: var(--text-dim);
    font-family: var(--font-mono);
  }

  .user-bar .btn {
    padding: 6px 14px;
    font-size: 12px;
  }

  /* ---------- Export modal ---------- */
  .range-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .range-btn {
    border: 1px solid var(--border-strong);
    background: var(--surface-2);
    color: var(--text-dim);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    padding: 8px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: border-color 0.12s ease, color 0.12s ease, background 0.12s ease;
  }
  .range-btn:hover { color: var(--text); border-color: var(--accent-dim); }
  .range-btn.active {
    background: var(--accent);
    color: #1b1826;
    border-color: var(--accent);
  }

  .custom-range-row {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .custom-range-row input[type="date"] { flex: 1; }
  .custom-range-row span { color: var(--text-faint); font-size: 13px; }

  .export-preview {
    font-size: 13px;
    color: var(--text-dim);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    margin: 4px 0 4px;
  }
  .export-preview.empty { color: var(--text-faint); font-style: italic; }