body { background: var(--grad-page); background-attachment: fixed; min-height: 100vh; margin: 0; color: var(--text-hi); display: flex; flex-direction: column; }
  /* width: 100% is required because `body { display: flex; flex-direction: column }`
     + `margin: 0 auto` makes the shell collapse to fit-content width in flexbox,
     so each tab's intrinsic content was driving a different shell width. */
  .shell { width: 100%; max-width: 1200px; margin: 0 auto; padding: 16px; box-sizing: border-box; }

  /* Topbar */
  .topbar {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
    padding: 10px 16px; display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
  }
  .topbar .left { display: flex; align-items: center; gap: 14px; }
  .topbar .brand { font-weight: 700; font-size: 14px; }
  .topbar .who { color: var(--text-md); font-size: 11px; font-family: var(--mono); }
  .topbar .right { display: flex; gap: 8px; }
  .topbar a, .topbar button {
    background: transparent; border: 1px solid var(--border); color: var(--text-md);
    font-size: 11px; padding: 5px 10px; border-radius: 4px;
    font-family: var(--mono); cursor: pointer; text-decoration: none;
  }
  .topbar a:hover, .topbar button:hover { border-color: var(--accent-2); color: var(--accent-2); }

  /* Layout */
  .layout { display: grid; grid-template-columns: 220px 1fr; gap: 18px; margin-top: 16px; align-items: start; }

  /* Sidebar tabs */
  .sidebar {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
    padding: 14px; height: fit-content;
  }
  .sidebar .user-block {
    padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 14px;
  }
  .sidebar .user-name { font-size: 14px; font-weight: 700; color: var(--text-hi); margin-bottom: 4px; }
  .sidebar .user-email { font-size: 11px; color: var(--text-md); font-family: var(--mono); word-break: break-all; }
  .sidebar .user-plan {
    display: inline-block; margin-top: 8px;
    padding: 2px 8px; border-radius: 100px;
    font-size: 9px; font-weight: 700; font-family: var(--mono);
    letter-spacing: 0.5px; text-transform: uppercase;
  }
  .sidebar .user-plan.free { background: rgba(143,168,200,0.15); color: var(--text-md); }
  .sidebar .user-plan.pro  { background: var(--accent-dim); color: var(--accent-2); }
  .sidebar .user-plan.team { background: var(--accent-dim); color: var(--accent); }

  .tab-btn {
    display: block; width: 100%; text-align: left;
    background: transparent; border: 0; color: var(--text-md);
    padding: 9px 12px; border-radius: 5px; font-size: 13px; cursor: pointer;
    font-family: inherit; margin-bottom: 2px;
    transition: all .12s;
  }
  .tab-btn:hover { background: rgba(255,255,255,0.04); color: var(--text-hi); }
  .tab-btn.active {
    background: var(--accent-dim); color: var(--accent-2); font-weight: 700;
  }
  .tab-btn .ico { display: inline-block; width: 18px; }

  /* Reserve the scrollbar gutter so switching between a short tab and a tall one
     never shifts the centered layout sideways. */
  html { scrollbar-gutter: stable; }
  /* Content - FIXED height so every tab renders at the exact same card size.
     Short tabs (API Access) no longer collapse to ~120px; tall tabs (Billing)
     scroll inside instead of stretching the card. The clamp() keeps it usable
     on both small laptops (~600px viewport) and big monitors (>1200px). */
  .content {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
    padding: 28px;
    height: clamp(520px, calc(100vh - 180px), 760px);
    overflow-y: auto;
    /* Reserve scrollbar gutter so tabs whose content overflows (Billing) keep
       the same inner width as short tabs (API). Without this the inner area
       shrinks by ~15px whenever the card scrollbar appears. */
    scrollbar-gutter: stable;
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
  }
  /* Each tab panel fills the card so short content centers nicely instead of
     hugging the top of a mostly-empty box. */
  .content > [data-panel] { min-height: 100%; }
  .content h2 {
    font-size: 20px; font-weight: 700; margin: 0 0 6px;
    letter-spacing: -0.01em;
  }
  .content .sub {
    color: var(--text-md); font-size: 13px; line-height: 1.5; margin-bottom: 24px;
  }

  /* Sections */
  .section { padding: 18px 0; border-bottom: 1px solid var(--bg-input); }
  .section:last-child { border-bottom: 0; }
  .section h3 {
    font-size: 11px; color: var(--text-md); font-family: var(--mono);
    text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 12px;
  }

  /* Form rows */
  .row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
  .row label {
    min-width: 120px; font-size: 12px; color: var(--text-md); font-family: var(--mono);
  }
  .row input[type="text"], .row input[type="email"], .row input[type="password"] {
    flex: 1;
    background: var(--bg-card2); border: 1px solid var(--border); border-radius: 5px;
    color: var(--text-hi); font-size: 13px; padding: 8px 10px; font-family: inherit;
  }
  .row input:focus { outline: none; border-color: var(--accent-2); }
  .row .value { font-size: 13px; color: var(--text-hi); font-family: var(--mono); }

  /* Buttons */
  .btn-primary {
    background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
    color: #fff; border: 0; padding: 8px 16px; border-radius: 5px;
    font-size: 12px; font-weight: 700; cursor: pointer; font-family: inherit;
  }
  .btn-primary:hover { transform: translateY(-1px); }
  .btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
  .btn-secondary {
    background: rgba(255,255,255,0.04); color: var(--text-hi);
    border: 1px solid var(--border);
    padding: 8px 16px; border-radius: 5px;
    font-size: 12px; font-weight: 700; cursor: pointer; font-family: inherit;
  }
  .btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: var(--accent-2); }
  .btn-danger {
    background: transparent; color: var(--red);
    border: 1px solid color-mix(in srgb, var(--red) 30%, transparent);
    padding: 6px 12px; border-radius: 5px;
    font-size: 11px; cursor: pointer; font-family: inherit;
  }
  .btn-danger:hover { background: color-mix(in srgb, var(--red) 10%, transparent); }
  /* Account-deletion section (Play policy: self-serve deletion must be discoverable) */
  .danger-zone { border-left: 2px solid color-mix(in srgb, var(--red) 35%, transparent); padding-left: 14px; margin-top: 8px; }
  .danger-zone h3 { color: var(--red); }

  /* Unified AI credit balance (allowance + earned tokens), read-only, above the plans */
  .credit-balance {
    margin: 2px 0 14px; padding: 12px 15px;
    border-radius: 10px;
    background: var(--accent-dim); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
    color: var(--text);
  }
  .credit-balance .cb-num { font-size: 22px; font-weight: 800; color: var(--accent-2); font-family: var(--mono); }
  .credit-balance .cb-lbl { font-size: 13px; font-weight: 600; }
  .credit-balance .cb-sub { margin-top: 3px; font-size: 11.5px; color: var(--text-md); }

  /* Pricing cards */
  .plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 14px; }
  @media (min-width: 901px) { .plan.featured { transform: scale(1.02); } }
  @media (max-width: 900px) { .plans { grid-template-columns: 1fr; gap: 16px; } .plan-tag { min-height: 0; } }
  .plan {
    background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: 18px;
    padding: 20px 18px; position: relative;
    display: flex; flex-direction: column;
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    transition: border-color .15s, box-shadow .15s;
  }
  .plan:hover { border-color: color-mix(in srgb, var(--accent-2, #a78bff) 45%, var(--border)); }
  .plan-feats { flex: 1 1 auto; }                 /* grows so the pay row sits at the bottom, aligned across cards */
  .plan-foot { margin-top: 16px; }
  .plan.featured {
    border-color: var(--accent-2);
    background: linear-gradient(160deg, rgba(155,114,255,.14), rgba(155,114,255,.04) 55%, rgba(255,255,255,.02));
    box-shadow: 0 0 0 1px rgba(155,114,255,.25), 0 14px 40px rgba(106,61,240,.18);
  }
  .plan.current {
    border-color: var(--green);
    background: linear-gradient(180deg, color-mix(in srgb, var(--green) 5%, transparent) 0%, var(--bg-card2) 60%);
  }
  .plan.current::after {
    content: 'CURRENT';
    position: absolute; top: 12px; right: 12px;
    font-size: 9px; font-weight: 700; color: var(--green);
    background: color-mix(in srgb, var(--green) 12%, transparent); padding: 2px 8px; border-radius: 100px;
    font-family: var(--mono); letter-spacing: 0.5px;
  }
  .plan.featured::after {
    content: 'MOST POPULAR';
    position: absolute; top: -9px; left: 14px;
    font-size: 8.5px; font-weight: 800; color: #fff;
    background: linear-gradient(135deg, #9b72ff, #6a3df0); padding: 3px 9px; border-radius: 7px;
    font-family: var(--mono); letter-spacing: 0.7px; white-space: nowrap;
  }
  /* Pro tier: subtle gold border + gradient (kept light so it reads premium, not loud) */
  .plan.tier-pro, .plan.tier-team {
    border-color: color-mix(in srgb, #e3bd55 55%, var(--border));
    background: linear-gradient(180deg, color-mix(in srgb, #e3bd55 9%, transparent) 0%, var(--bg-card2) 55%);
  }
  .plan-name { font-size: 15px; font-weight: 800; letter-spacing: -.2px; margin-bottom: 4px; }
  .plan-price { font-size: 30px; font-weight: 800; letter-spacing: -.5px; line-height: 1; margin: 8px 0; }
  .plan-price .cur { font-size: 14px; color: var(--text-md); vertical-align: top; }
  .plan-price .per { font-size: 11px; color: var(--text-md); font-weight: 400; }
  .plan-tokens { display: inline-flex; align-items: center; gap: 5px; margin: 6px 0 2px; font-size: 11.5px; color: var(--text-md); }
  .plan-tokens b { color: var(--text); font-weight: 700; }
  .plan-tok-coin { width: 15px; height: 15px; display: block; flex: none; }
  .bill-toggle { display: flex; gap: 4px; width: max-content; margin: 4px 0 14px; padding: 4px; background: var(--bg-card2, #11161f); border: 1px solid var(--border2, #222b38); border-radius: 999px; }
  .bill-toggle button { border: 0; background: transparent; color: var(--text-md); font: 600 12px var(--font); padding: 7px 14px; border-radius: 999px; cursor: pointer; display: flex; align-items: center; gap: 6px; }
  .bill-toggle button.on { background: var(--purple, #7b5cff); color: #fff; }
  .bt-save { font-size: 9px; font-weight: 800; letter-spacing: .3px; text-transform: uppercase; color: var(--accent-2, #a78bff); }
  .bill-toggle button.on .bt-save { color: rgba(255,255,255,.85); }
  /* Pay rails shown directly on each paid card (PayPal / card / crypto), pinned to the card bottom */
  .plan-pay { display: flex; flex-direction: column; gap: 7px; }
  .pay-lbl { font-size: 10px; text-transform: uppercase; letter-spacing: .4px; color: var(--text-md); }
  .pay-row { display: flex; gap: 8px; }
  .pay-m {
    flex: 1 1 0; min-width: 0; display: inline-flex; align-items: center; justify-content: center; gap: 7px;
    border: 1px solid rgba(155,114,255,.35); background: rgba(155,114,255,.08); color: var(--text-hi);
    font: 700 12.5px var(--font); padding: 11px 8px; border-radius: 11px; cursor: pointer;
    transition: border-color .12s, background .12s, box-shadow .12s;
  }
  .pay-m:hover { box-shadow: 0 6px 18px rgba(106,61,240,.25); }
  .pay-m svg { flex: none; }
  .pay-m span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .pay-m:hover { border-color: var(--purple, #7b5cff); background: color-mix(in srgb, var(--purple, #7b5cff) 12%, var(--bg-card, #0c1017)); }
  .pay-paypal:hover { border-color: #0070ba; background: color-mix(in srgb, #0070ba 12%, var(--bg-card, #0c1017)); }
  .pay-crypto:hover { border-color: #26a17b; background: color-mix(in srgb, #26a17b 12%, var(--bg-card, #0c1017)); }
  .pay-m:disabled { opacity: .6; cursor: default; }
  @media (max-width: 900px) { .pay-row { flex-wrap: wrap; } .pay-m { flex: 1 1 calc(50% - 4px); } }
  .plan-tag { font-size: 11.5px; line-height: 1.45; color: var(--text-md); margin: 2px 0 12px; min-height: 33px; }
  .plan-feat { font-size: 12px; line-height: 1.45; color: #c7ccdb; margin: 5px 0; padding-left: 18px; position: relative; overflow-wrap: anywhere; }
  .plan-feat::before { content: '✓'; color: var(--flow-in, #34d39a); font-weight: 800; position: absolute; left: 0; }
  .plan-cta {
    margin-top: 12px; width: 100%;
    background: rgba(255,255,255,0.04); color: var(--text-hi);
    border: 1px solid var(--border);
    padding: 8px; border-radius: 5px;
    font-size: 12px; font-weight: 700; cursor: pointer; font-family: inherit;
  }
  .plan-cta:hover { background: rgba(255,255,255,0.08); }
  .plan.featured .plan-cta {
    background: linear-gradient(135deg, var(--accent-2) 0%, var(--accent) 100%);
    color: #fff; border-color: transparent;
  }
  .plan.current .plan-cta {
    background: color-mix(in srgb, var(--green) 10%, transparent); color: var(--green);
    border-color: color-mix(in srgb, var(--green) 30%, transparent);
    cursor: default;
  }

  /* Payment method card */
  .card-row {
    display: flex; align-items: center; gap: 14px;
    padding: 12px 14px;
    background: var(--bg-card2); border: 1px solid var(--border); border-radius: 6px;
    font-family: var(--mono);
  }
  .card-brand {
    width: 40px; height: 26px; background: var(--border);
    border-radius: 3px; display: flex; align-items: center; justify-content: center;
    font-size: 10px; font-weight: 700; color: #fff;
  }
  .card-brand.visa { background: #1a1f71; }
  .card-info { flex: 1; }
  .card-info .num { font-size: 13px; color: var(--text-hi); }
  .card-info .exp { font-size: 10px; color: var(--text-md); }

  /* Invoice table */
  .invoice-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 12px; }
  .invoice-table th, .invoice-table td { padding: 9px 8px; text-align: left; border-bottom: 1px solid var(--bg-input); }
  .invoice-table th { color: var(--text-md); font-size: 9px; text-transform: uppercase; letter-spacing: 0.5px; font-weight: 700; }
  .invoice-table .status.paid { color: var(--green); }
  .invoice-table .status.pending { color: #ff9900; }

  /* Toggle */
  .toggle-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 0; border-bottom: 1px solid var(--bg-input);
  }
  .toggle-row:last-child { border-bottom: 0; }
  .toggle-info .name { font-size: 13px; color: var(--text-hi); font-weight: 700; margin-bottom: 3px; }
  .toggle-info .desc { font-size: 11px; color: var(--text-md); }
  .toggle {
    position: relative; width: 36px; height: 20px;
    background: var(--border); border-radius: 100px;
    cursor: pointer; transition: background .2s;
    flex-shrink: 0;
  }
  .toggle::after {
    content: ''; position: absolute; top: 2px; left: 2px;
    width: 16px; height: 16px; background: #fff;
    border-radius: 50%; transition: transform .2s;
  }
  .toggle.on { background: var(--accent-2); }
  .toggle.on::after { transform: translateX(16px); }

  /* API keys */
  .api-key-card {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 14px;
    background: var(--bg-card2); border: 1px solid var(--border); border-radius: 6px;
    margin-bottom: 8px;
    font-family: var(--mono);
  }
  .api-key-info { flex: 1; }
  .api-key-info .key-name { font-size: 13px; color: var(--text-hi); font-weight: 700; }
  .api-key-info .key-meta { font-size: 10px; color: var(--text-md); margin-top: 3px; }
  .api-key-secret {
    background: var(--bg-page); border: 1px solid color-mix(in srgb, var(--green) 30%, transparent);
    color: var(--green);
    padding: 10px 12px; border-radius: 5px;
    font-family: var(--mono); font-size: 11px;
    word-break: break-all; margin: 8px 0;
  }

  /* Alerts */
  .alert {
    padding: 10px 14px; border-radius: 5px; font-size: 12px;
    margin-bottom: 16px; font-family: var(--mono);
  }
  .alert.success { background: color-mix(in srgb, var(--green) 8%, transparent); border: 1px solid color-mix(in srgb, var(--green) 30%, transparent); color: var(--green); }
  .alert.error   { background: color-mix(in srgb, var(--red) 8%, transparent); border: 1px solid color-mix(in srgb, var(--red) 30%, transparent); color: var(--red); }
  .alert.info    { background: var(--accent-dim); border: 1px solid var(--accent-border); color: var(--accent-2); }

  .loading { color: var(--text-md); text-align: center; padding: 30px; font-family: var(--mono); font-size: 11px; }
  .empty { color: var(--text-lo); text-align: center; padding: 20px; font-size: 11px; font-family: var(--mono); }

  /* ───── Mobile ─────
     Stack sidebar above content, drop the fixed-height card (full natural flow
     instead of an internal scroll on a tiny screen), and stack form rows so
     labels sit above their inputs instead of stealing 120px of horizontal room. */
  @media (max-width: 860px) {
    .shell { padding: 10px; }
    .layout { grid-template-columns: 1fr; gap: 12px; margin-top: 12px; }
    .sidebar { padding: 12px; }
    .sidebar .user-block { padding-bottom: 10px; margin-bottom: 10px; }
    .content {
      padding: 18px;
      height: auto;
      min-height: 0;
      overflow: visible;
    }
    .content > [data-panel] { min-height: 0; }
    .content h2 { font-size: 18px; }
    .content .sub { font-size: 12px; margin-bottom: 18px; }
    .section { padding: 14px 0; }

    .row { flex-direction: column; align-items: stretch; gap: 4px; margin-bottom: 14px; }
    .row label { min-width: 0; }
    .row .value { font-size: 13px; }

    .invoice-table { font-size: 11px; }
    .invoice-table th, .invoice-table td { padding: 7px 5px; }

    .card-row { flex-wrap: wrap; }
    .card-row .card-info { flex: 1 1 60%; }

    .api-key-card { flex-wrap: wrap; }

    .toggle-row { gap: 12px; }
  }