/* ───────────────────────────────────────────────────────────────────
       PROFILE PAGE  (rendered into #stub-body when route is #profile)
       Identity zone + progress + streak + study time + subscription + settings.
       ─────────────────────────────────────────────────────────────────── */
    .stub-body.is-profile {
      display: block;
      align-items: stretch;
      justify-content: stretch;
      padding: 2rem 1.6rem 4rem;
    }
    .profile-page {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1.4rem;
    }
    .profile-identity {
      display: flex;
      align-items: center;
      gap: 1.2rem;
      padding: 1.6rem 1.6rem;
      background: var(--bg-tint);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
    }
    .profile-id-actions {
      margin-left: auto;
      display: flex; align-items: center; gap: .55rem;
      flex-shrink: 0;
    }
    @media (max-width: 600px) {
      .profile-id-actions {
        margin-left: 0;
        margin-top: .65rem;
        align-self: flex-start;
      }
    }
    .profile-id-gear {
      display: inline-flex; align-items: center; justify-content: center;
      width: 40px; height: 40px;
      background: transparent;
      color: var(--ink);
      border: 1.5px solid var(--line);
      border-radius: 50%;
      cursor: pointer;
      transition: border-color .15s, background .15s, transform .12s;
    }
    .profile-id-gear:hover {
      border-color: var(--ink-mute, var(--ink));
      background: var(--card, #fff);
      transform: rotate(30deg);
    }
    .profile-id-gear svg { display: block; }

    .profile-id-admin-btn {
      align-self: center;
      display: inline-flex;
      align-items: center;
      gap: .35rem;
      background: var(--ink);
      color: var(--bg);
      padding: .65rem 1.1rem;
      border-radius: 999px;
      font-size: .88rem;
      font-weight: 600;
      text-decoration: none;
      transition: transform .12s, box-shadow .12s, background .15s;
      flex-shrink: 0;
      box-shadow: 0 4px 12px rgba(26, 29, 35, 0.15);
    }
    .profile-id-admin-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(26, 29, 35, 0.22);
      background: #2a2f3a;
    }
    .profile-avatar {
      width: 72px; height: 72px;
      border-radius: 50%;
      background: var(--ink);
      color: var(--bg);
      display: flex; align-items: center; justify-content: center;
      font-family: var(--font-display);
      font-size: 1.8rem;
      font-weight: 500;
      flex-shrink: 0;
      letter-spacing: -.02em;
    }
    .profile-id-meta { flex: 1; min-width: 0; }
    .profile-id-name {
      font-family: var(--font-display);
      font-size: 1.55rem;
      color: var(--ink);
      font-weight: 500;
      line-height: 1.15;
      margin: 0 0 .25rem;
      word-break: break-word;
    }
    .profile-id-email {
      font-size: .88rem;
      color: var(--ink-soft);
      word-break: break-all;
    }
    .profile-id-pills {
      margin-top: .55rem;
      display: flex;
      flex-wrap: wrap;
      gap: .4rem;
    }
    .profile-pill {
      display: inline-flex; align-items: center; gap: .35rem;
      padding: .25rem .65rem;
      border-radius: 999px;
      background: var(--line-soft);
      color: var(--ink-soft);
      font-size: .74rem;
      font-weight: 600;
    }
    .profile-pill.is-clickable { cursor: pointer; border: 1px solid transparent; }
    .profile-pill.is-clickable:hover { border-color: var(--line); color: var(--ink); }
    .profile-pill .pill-logo {
      width: 16px; height: 16px;
      border-radius: 4px;
      object-fit: cover;
      background: var(--card);
    }

    .profile-card {
      background: var(--bg-tint);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      padding: 1.4rem 1.6rem;
    }
    .profile-card-h {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: .8rem;
      margin-bottom: 1rem;
    }
    .profile-card-h h3 {
      font-family: var(--font-display);
      font-size: 1.05rem;
      font-weight: 500;
      color: var(--ink);
      margin: 0;
    }
    .profile-card-eyebrow {
      font-size: .7rem;
      letter-spacing: .14em;
      text-transform: uppercase;
      color: var(--ink-mute);
      font-weight: 700;
      margin-bottom: .15rem;
    }
    .profile-icon-btn {
      display: inline-flex; align-items: center; justify-content: center;
      width: 32px; height: 32px;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: transparent;
      color: var(--ink-soft);
      cursor: pointer;
      flex-shrink: 0;
    }
    .profile-icon-btn:hover { background: var(--line-soft); color: var(--ink); }
    .profile-icon-btn svg { width: 16px; height: 16px; }

    /* Progress card with donut + bars side-by-side */
    .profile-progress {
      display: grid;
      grid-template-columns: 200px 1fr;
      gap: 1.6rem;
      align-items: center;
    }
    @media (max-width: 720px) {
      .profile-progress { grid-template-columns: 1fr; }
    }
    .profile-donut {
      position: relative;
      width: 180px; height: 180px;
      margin: 0 auto;
    }
    .profile-donut svg { width: 100%; height: 100%; transform: rotate(-90deg); }
    .profile-donut-track  { stroke: var(--line-soft); }
    .profile-donut-fill   { stroke: var(--accent-warm); transition: stroke-dasharray .6s ease; }
    .profile-donut-center {
      position: absolute; inset: 0;
      display: flex; flex-direction: column;
      align-items: center; justify-content: center;
      text-align: center;
    }
    .profile-donut-pct {
      font-family: var(--font-display);
      font-size: 2.1rem;
      font-weight: 500;
      color: var(--ink);
      line-height: 1;
    }
    .profile-donut-label {
      font-size: .72rem;
      letter-spacing: .12em;
      text-transform: uppercase;
      color: var(--ink-mute);
      margin-top: .3rem;
      font-weight: 700;
    }

    .profile-level-toggle {
      display: flex;
      gap: .35rem;
      flex-wrap: wrap;
      margin-bottom: .9rem;
    }
    .profile-level-btn {
      padding: .3rem .7rem;
      border: 1px solid var(--line);
      background: transparent;
      color: var(--ink-soft);
      font-size: .76rem;
      font-weight: 600;
      letter-spacing: .04em;
      border-radius: 999px;
      cursor: pointer;
    }
    .profile-level-btn:hover { color: var(--ink); border-color: var(--ink-mute); }
    .profile-level-btn.is-active {
      background: var(--ink);
      color: var(--bg);
      border-color: var(--ink);
    }

    .profile-cat-row {
      display: flex;
      align-items: center;
      gap: .8rem;
      padding: .35rem 0;
    }
    .profile-cat-label {
      width: 72px;
      font-size: .82rem;
      color: var(--ink-soft);
      font-weight: 600;
      flex-shrink: 0;
    }
    .profile-cat-bar {
      flex: 1;
      height: 8px;
      background: var(--line-soft);
      border-radius: 999px;
      overflow: hidden;
    }
    .profile-cat-bar-fill {
      height: 100%;
      border-radius: 999px;
      transition: width .5s ease;
    }
    .profile-cat-count {
      width: 56px;
      text-align: right;
      font-size: .76rem;
      font-variant-numeric: tabular-nums;
      color: var(--ink-mute);
      flex-shrink: 0;
    }

    /* Stat row — streak + study time + subscription */
    .profile-stats {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.4rem;
    }
    .profile-stat {
      background: var(--bg-tint);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      padding: 1.2rem 1.4rem;
      display: flex;
      flex-direction: column;
      gap: .3rem;
      position: relative;
    }
    .profile-stat-label {
      font-size: .72rem;
      letter-spacing: .14em;
      text-transform: uppercase;
      color: var(--ink-mute);
      font-weight: 700;
    }
    .profile-stat-value {
      font-family: var(--font-display);
      font-size: 1.9rem;
      font-weight: 500;
      color: var(--ink);
      line-height: 1.1;
    }
    .profile-stat-unit { font-size: .85rem; color: var(--ink-soft); margin-left: .3rem; font-family: var(--font-body); }
    .profile-stat-sub { font-size: .8rem; color: var(--ink-soft); }
    .profile-stat-action {
      position: absolute;
      bottom: .9rem; left: .9rem;
    }
    .profile-stat:has(.profile-stat-action) { padding-bottom: 3.4rem; }

    /* Subscription card */
    .profile-sub-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .profile-sub-info { flex: 1; min-width: 200px; }
    .profile-sub-status {
      display: inline-flex;
      align-items: center;
      gap: .35rem;
      font-size: .74rem;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
      padding: .22rem .6rem;
      border-radius: 999px;
    }
    .profile-sub-status.is-active   { background: rgba(92,138,106,.14); color: #3F6B4E; }
    .profile-sub-status.is-grace    { background: rgba(214,118,89,.14); color: var(--accent-warm); }
    .profile-sub-status.is-expired,
    .profile-sub-status.is-cancelled,
    .profile-sub-status.is-refunded { background: rgba(150,138,117,.18); color: var(--ink-soft); }
    .profile-sub-status.is-none     { background: var(--line-soft); color: var(--ink-soft); }
    .profile-sub-status.is-god      { background: rgba(184,146,58,.18); color: var(--gold); }
    .profile-sub-meta {
      margin-top: .5rem;
      font-size: .85rem;
      color: var(--ink-soft);
    }
    .profile-sub-cta {
      display: inline-flex;
      align-items: center;
      gap: .4rem;
      padding: .55rem 1.1rem;
      border-radius: 999px;
      background: var(--ink);
      color: var(--bg);
      border: 1px solid var(--ink);
      font-size: .82rem;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
    }
    .profile-sub-cta:hover { background: var(--accent-warm); border-color: var(--accent-warm); }
    .profile-sub-cta.is-ghost { background: transparent; color: var(--ink); }
    .profile-sub-cta.is-ghost:hover { background: var(--line-soft); color: var(--ink); border-color: var(--ink-mute); }

    /* Settings list */
    .profile-settings { display: flex; flex-direction: column; }
    .profile-setting-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: .9rem 0;
      border-bottom: 1px solid var(--line-soft);
    }
    .profile-setting-row:last-child { border-bottom: none; }
    .profile-setting-meta { flex: 1; min-width: 0; }
    .profile-setting-name { font-size: .92rem; color: var(--ink); font-weight: 500; }
    .profile-setting-desc { font-size: .8rem; color: var(--ink-soft); margin-top: .15rem; line-height: 1.4; }
    .profile-setting-control { flex-shrink: 0; }
    .profile-setting-control .lang-toggle {
      gap: .25rem;
      padding: .2rem;
      border: 1px solid var(--line);
      border-radius: 999px;
    }
    .profile-setting-btn {
      padding: .5rem 1rem;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: transparent;
      color: var(--ink);
      font-size: .82rem;
      font-weight: 600;
      cursor: pointer;
    }
    .profile-setting-btn:hover { border-color: var(--ink); }
    .profile-setting-btn.is-danger { color: #B6442C; border-color: rgba(182,68,44,.4); }
    .profile-setting-btn.is-danger:hover { background: rgba(182,68,44,.08); border-color: #B6442C; }
    .profile-setting-msg { font-size: .78rem; color: var(--ink-soft); margin-top: .35rem; }
    .profile-setting-msg.is-success { color: #3F6B4E; }
    .profile-setting-msg.is-error   { color: #B6442C; }

    /* Course-switcher dropdown for users with multiple enrollments */
    .profile-course-switcher {
      position: relative;
      display: inline-block;
    }
    .profile-course-menu {
      position: absolute;
      top: calc(100% + 6px);
      left: 0;
      min-width: 220px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 12px;
      box-shadow: 0 10px 28px rgba(26,22,16,.14);
      padding: .35rem;
      display: none;
      z-index: 10;
    }
    .profile-course-menu.is-open { display: block; }
    .profile-course-item {
      display: flex; align-items: center; gap: .55rem;
      padding: .55rem .7rem;
      border-radius: 8px;
      font-size: .85rem;
      color: var(--ink);
      cursor: pointer;
      text-decoration: none;
    }
    .profile-course-item:hover { background: var(--line-soft); }
    .profile-course-item.is-active { background: var(--line-soft); font-weight: 600; }
    .profile-course-item .pill-logo { width: 18px; height: 18px; border-radius: 4px; object-fit: cover; background: var(--card); }

    /* Modal popup for time-stats */
    .profile-modal {
      position: fixed; inset: 0;
      z-index: 200;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 1.4rem;
      background: rgba(26,22,16,.42);
      backdrop-filter: blur(2px);
    }
    .profile-modal.is-open { display: flex; }
    .profile-modal-card {
      background: var(--bg-tint);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      max-width: 540px;
      width: 100%;
      max-height: 86vh;
      overflow-y: auto;
      padding: 1.6rem 1.6rem 1.4rem;
      box-shadow: 0 24px 80px rgba(26,22,16,.28);
    }
    .profile-modal-h {
      display: flex; align-items: center; justify-content: space-between;
      gap: 1rem;
      margin-bottom: 1rem;
    }
    .profile-modal-h h3 {
      font-family: var(--font-display);
      font-size: 1.2rem;
      margin: 0;
      color: var(--ink);
      font-weight: 500;
    }
    .profile-modal-close {
      width: 32px; height: 32px;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: transparent;
      cursor: pointer;
      color: var(--ink-soft);
      display: inline-flex; align-items: center; justify-content: center;
    }
    .profile-modal-close:hover { background: var(--line-soft); color: var(--ink); }
    /* ── Study Time popup (redesigned) ── */
    .st-modal {
      display: flex; flex-direction: column;
      gap: 1.4rem;
    }
    .st-hero {
      text-align: center;
      padding: 1.4rem 1rem;
      background: linear-gradient(180deg, var(--bg-tint), var(--card));
      border: 1px solid var(--line);
      border-radius: 14px;
    }
    .st-hero-num {
      font-family: var(--font-display);
      font-size: clamp(2.6rem, 7vw, 3.6rem);
      font-weight: 500;
      letter-spacing: -.02em;
      line-height: 1;
      color: var(--ink);
    }
    .st-hero-sub {
      font-size: .9rem;
      color: var(--ink-soft);
      margin-top: .55rem;
    }

    .st-section { /* spacing only */ }
    .st-section-h {
      display: flex; align-items: baseline; justify-content: space-between;
      margin-bottom: .85rem;
    }
    .st-section-title {
      font-size: .72rem;
      letter-spacing: .14em;
      text-transform: uppercase;
      color: var(--ink-mute);
      font-weight: 700;
    }
    .st-section-meta {
      font-size: .76rem;
      color: var(--ink-mute);
      font-variant-numeric: tabular-nums;
    }

    .st-bars {
      display: grid;
      grid-template-columns: repeat(8, 1fr);
      gap: .4rem;
      height: 130px;
      padding: .25rem 0 .2rem;
    }
    /* Last 7 days has only 7 columns. */
    .st-section .st-bars:has(> :nth-child(7):last-child) {
      grid-template-columns: repeat(7, 1fr);
    }
    .st-bar {
      display: flex; flex-direction: column; align-items: center;
      gap: .3rem;
      min-width: 0;
    }
    .st-bar-val {
      font-size: .7rem;
      color: var(--ink-soft);
      font-variant-numeric: tabular-nums;
      font-weight: 600;
      height: 1em;
    }
    .st-bar.is-empty .st-bar-val { color: var(--ink-mute); opacity: .5; }
    .st-bar-track {
      width: 100%;
      flex: 1;
      background: var(--line-soft);
      border-radius: 6px;
      position: relative;
      overflow: hidden;
      min-height: 2px;
    }
    .st-bar-fill {
      position: absolute;
      bottom: 0; left: 0; right: 0;
      background: linear-gradient(180deg, var(--accent-warm), #B85D40);
      border-radius: 6px;
      transition: height .35s cubic-bezier(.2,.8,.2,1);
    }
    .st-bar.is-today .st-bar-fill {
      background: linear-gradient(180deg, var(--ink), #000);
    }
    .st-bar.is-empty .st-bar-fill { display: none; }
    .st-bar-label {
      font-size: .68rem;
      color: var(--ink-mute);
      font-weight: 600;
      letter-spacing: .04em;
      text-align: center;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      width: 100%;
    }
    .st-bar.is-today .st-bar-label { color: var(--ink); }

    /* Generic form rows used inside both profile-modal and class-modal */
    .modal-field { display: flex; flex-direction: column; gap: .35rem; margin-bottom: .9rem; }
    .modal-field label {
      font-size: .72rem; letter-spacing: .1em; text-transform: uppercase;
      color: var(--ink-mute); font-weight: 700;
    }
    .modal-field input, .modal-field select, .modal-field textarea {
      padding: .65rem .85rem;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: #fff;
      color: var(--ink);
      font-family: var(--font-body);
      font-size: .94rem;
      width: 100%;
    }
    .modal-field input:focus, .modal-field select:focus, .modal-field textarea:focus {
      outline: none; border-color: var(--accent-warm);
      box-shadow: 0 0 0 3px rgba(214,118,89,.18);
    }
    .modal-field textarea { resize: vertical; min-height: 64px; }
    .modal-field-hint { font-size: .76rem; color: var(--ink-soft); }
    .modal-field-check { display: flex; align-items: center; gap: .55rem; font-size: .9rem; color: var(--ink); }
    .modal-field-check input { width: auto; }
    .modal-actions {
      display: flex; gap: .55rem; justify-content: flex-end;
      padding-top: .8rem;
      border-top: 1px solid var(--line-soft);
      margin-top: 1rem;
    }
    .modal-btn {
      padding: .55rem 1.1rem;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: transparent;
      color: var(--ink);
      font-size: .85rem;
      font-weight: 600;
      cursor: pointer;
    }
    .modal-btn:hover { border-color: var(--ink); }
    .modal-btn.is-primary {
      background: var(--ink); color: var(--bg); border-color: var(--ink);
    }
    .modal-btn.is-primary:hover { background: var(--accent-warm); border-color: var(--accent-warm); }
    .modal-btn.is-danger {
      background: transparent; color: #B6442C; border-color: rgba(182,68,44,.4);
    }
    .modal-btn.is-danger:hover { background: rgba(182,68,44,.08); border-color: #B6442C; }
    .modal-msg { font-size: .82rem; margin-top: .5rem; padding: .5rem .7rem; border-radius: 8px; display: none; }
    .modal-msg.is-shown { display: block; }
    .modal-msg.is-error { background: rgba(182,68,44,.08); color: #B6442C; }
    .modal-msg.is-success { background: rgba(42,107,71,.08); color: var(--read-right); }


    /* ── My classes card (school class memberships) ──────────────── */
    .profile-classes-card { padding: 1.1rem 1.2rem; }
    .profile-cls-list { display: flex; flex-direction: column; gap: .55rem; }
    .profile-cls-row {
      display: flex; align-items: center; gap: 1rem;
      padding: .8rem 1rem;
      background: var(--bg-soft, var(--line-soft));
      border-radius: 10px;
      text-decoration: none; color: inherit;
      transition: background .12s ease;
    }
    .profile-cls-row:hover { background: color-mix(in oklab, var(--accent, var(--ink)) 8%, var(--bg-soft, var(--line-soft))); }
    .profile-cls-mark {
      width: 2.4rem; height: 2.4rem; flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      background: var(--ink); color: var(--bg);
      border-radius: 8px;
      font-family: var(--font-display); font-weight: 600; font-size: 1rem;
    }
    .profile-cls-body { flex: 1; min-width: 0; }
    .profile-cls-name { font-weight: 500; color: var(--ink); font-size: .98rem; }
    .profile-cls-meta {
      margin-top: .25rem; font-size: .78rem; color: var(--ink-mute);
      display: flex; gap: .5rem; align-items: center; flex-wrap: wrap;
    }
    .profile-cls-mode, .profile-cls-role {
      font-size: .68rem; padding: .1rem .5rem; border-radius: 999px;
      font-weight: 600; letter-spacing: .03em; text-transform: uppercase;
    }
    .profile-cls-mode.is-group  { background: #3B6A8A22; color: #3B6A8A; }
    .profile-cls-mode.is-indiv  { background: #8C6B3F22; color: #8C6B3F; }
    .profile-cls-role.is-teacher { background: #2A6B4722; color: var(--read-right, #2A6B47); }
    .profile-cls-role.is-student { background: var(--line-soft); color: var(--ink-soft); }
    .profile-cls-arrow { color: var(--ink-mute); font-size: 1.1rem; flex-shrink: 0; }

    /* Settings modal — replaces the inline settings card. Triggered by
       the gear button in the identity zone. Markup is rendered into the
       page on every profile load; we only toggle .is-open + a body class
       to lock background scroll. */
    .profile-settings-modal {
      position: fixed; inset: 0; z-index: 9000;
      display: flex; align-items: center; justify-content: center;
      padding: 1.2rem;
      opacity: 0;
      pointer-events: none;
      transition: opacity .2s ease-out;
    }
    .profile-settings-modal.is-open {
      opacity: 1;
      pointer-events: auto;
    }
    .profile-settings-backdrop {
      position: absolute; inset: 0;
      background: rgba(20, 18, 14, .45);
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
    }
    .profile-settings-card {
      position: relative;
      width: 100%; max-width: 620px;
      max-height: calc(100vh - 2.4rem);
      overflow-y: auto;
      background: var(--card, #FFFDF4);
      border: 1px solid var(--line);
      border-radius: 16px;
      box-shadow: 0 24px 80px rgba(20,18,14,.25), 0 4px 16px rgba(20,18,14,.10);
      transform: translateY(8px) scale(.98);
      transition: transform .25s cubic-bezier(.2,.8,.3,1);
      padding: 1.6rem 1.5rem 1.5rem;
    }
    .profile-settings-modal.is-open .profile-settings-card {
      transform: translateY(0) scale(1);
    }
    .profile-settings-card .profile-card.profile-settings {
      background: transparent;
      border: none;
      padding: 0;
      box-shadow: none;
      margin: 0;
    }
    .profile-settings-close {
      position: absolute;
      top: .9rem; right: .9rem;
      width: 36px; height: 36px;
      display: inline-flex; align-items: center; justify-content: center;
      background: transparent;
      border: 1px solid var(--line);
      border-radius: 50%;
      color: var(--ink-mute);
      cursor: pointer;
      transition: border-color .15s, color .15s;
      z-index: 2;
    }
    .profile-settings-close:hover {
      color: var(--ink);
      border-color: var(--ink-mute);
    }
    body.is-modal-open { overflow: hidden; }