/* 網設 08: mock sign-in, account area, member chips, forum compose. Loaded ONLY when Sink:Auth:Mode!=off or Sink:ForumWrites=true
   (see _Layout.cshtml), so flags-off pages are byte-identical to before. Works on T4b and on the R3 revert theme. */
:root{--sa-ember:var(--accent-ember,#E69F4A);--sa-sand:#C9AE7A;--sa-text:var(--text-on-dark,#F4F2EF);--sa-muted:var(--text-on-dark-2,#A9A6A3);--sa-panel:var(--panel-fill,#17181B);--sa-border:var(--panel-border,#3B3535)}
/* §6.4 mock banner: full width 32px sand strip above the header; not dismissible. */
.mock-auth-banner{position:relative;z-index:21;display:flex;align-items:center;justify-content:center;min-height:32px;padding:4px 12px;background:#C9AE7A;color:#1A1412;font-size:13px;font-weight:600;line-height:1.35;text-align:center}
/* §2 header account area (outside the 4-item nav; nav order/text unchanged). */
.account-area{display:flex;align-items:center;justify-content:flex-end;min-width:0}
.t4b-header .account-area{grid-column:3;justify-self:end}
.account-login,.account-menu>summary{display:inline-flex;align-items:center;gap:8px;min-height:44px;min-width:44px;padding:6px 12px;border:1px solid rgba(244,242,239,.28);border-radius:4px;background:transparent;color:var(--sa-text);font-size:14px;cursor:pointer;list-style:none;white-space:nowrap}
.account-menu>summary::-webkit-details-marker{display:none}
.account-login:hover,.account-menu>summary:hover{border-color:var(--sa-ember)}
.account-login:focus-visible,.account-menu>summary:focus-visible,.account-pop a:focus-visible,.account-pop button:focus-visible,.auth-provider:focus-visible,.mock-identity:focus-visible{outline:2px solid var(--sa-ember);outline-offset:2px}
.account-menu{position:relative}
.account-avatar{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#2A2523;border:1px solid var(--sa-ember);color:var(--sa-text);font-size:13px;font-weight:700}
.account-label{max-width:9em;overflow:hidden;text-overflow:ellipsis}
.account-pop{position:absolute;right:0;top:calc(100% + 6px);z-index:30;display:grid;min-width:160px;padding:6px;border:1px solid var(--sa-border);border-radius:4px;background:#121214;box-shadow:0 12px 28px rgba(0,0,0,.45)}
.account-pop a,.account-pop button{display:flex;align-items:center;min-height:44px;padding:8px 12px;border:0;background:none;color:var(--sa-text);font-size:14px;text-align:left;cursor:pointer;width:100%}
.account-pop a:hover,.account-pop button:hover{background:#242022}
.account-pop form{margin:0}
.mock-chip{display:inline-flex;align-items:center;padding:1px 5px;border:1px dashed var(--sa-muted);border-radius:3px;color:var(--sa-muted);font-size:10px;font-weight:700;letter-spacing:.08em}
/* §5.2 chips: admin = ember solid + shield; level = outline/sand; pending = grey dashed + clock. */
.role-badge,.level-chip,.pending-chip{display:inline-flex;align-items:center;gap:4px;margin-left:6px;padding:1px 7px;border-radius:3px;font-size:12px;font-weight:600;line-height:1.5;white-space:nowrap;vertical-align:middle}
.role-admin{background:var(--sa-ember);border:1px solid var(--sa-ember);color:#1A1412}
.role-moderator{background:transparent;border:1px solid var(--sa-ember);color:var(--sa-ember)}
.level-newcomer{border:1px solid var(--sa-muted);color:var(--sa-muted)}
.level-explorer{border:1px solid var(--sa-sand);color:var(--sa-sand)}
.level-veteran{border:1px solid var(--sa-sand);background:var(--sa-sand);color:#1A1412}
.pending-chip{border:1px dashed var(--sa-muted);color:var(--sa-muted);font-style:normal}
.forum-reply.is-admin{box-shadow:inset 2px 0 0 var(--sa-ember)}
.forum-row.is-pending{opacity:.86;border-style:dashed}
.forum-reply.is-pending{opacity:.86}
.t4b-pending-note{display:flex;align-items:center;gap:8px;margin:0 0 14px;padding:10px 14px;border:1px dashed var(--sa-muted);border-radius:4px;color:var(--sa-muted)}
.t4b-pending-note .pending-chip{margin-left:0}
/* state banners + toast */
.state-banner{margin:0 0 16px;padding:12px 16px;border-radius:4px;border:1px solid var(--sa-border);background:rgba(0,0,0,.25);color:var(--sa-text);line-height:1.6}
.state-banner p{margin:0}.state-banner p+p{margin-top:8px}.state-banner ul{margin:6px 0 0;padding-left:20px}
.state-banner--error{border-color:#B5523F;background:rgba(181,82,63,.14)}
.state-banner--success{border-color:var(--sa-sand);background:rgba(201,174,122,.12)}
.state-banner--info{border-color:var(--sa-muted)}
.state-banner-hint{font-size:13px;color:var(--sa-muted)}
.sink-toast{position:fixed;left:50%;bottom:24px;z-index:40;transform:translateX(-50%);max-width:calc(100vw - 32px);padding:10px 18px;border:1px solid var(--sa-sand);border-radius:4px;background:#121214;color:var(--sa-text);font-size:14px;box-shadow:0 10px 24px rgba(0,0,0,.45);transition:opacity .3s ease}
.sink-toast.is-hidden{opacity:0;pointer-events:none}
@media (prefers-reduced-motion:reduce){.sink-toast{transition:none}}
/* login / welcome / account / mock authorize cards */
.auth-card{position:relative;max-width:560px;margin:40px auto 56px;padding:36px 32px;border:1px solid var(--sa-border);border-radius:6px;background:var(--sa-panel);color:var(--sa-text);overflow:hidden}
.auth-card h1{margin:6px 0 10px;font-size:1.75rem}
.auth-card .eyebrow{color:var(--sa-muted);font-size:.75rem;letter-spacing:.2em}
.auth-lead{color:var(--sa-muted);line-height:1.7}
.auth-providers{display:grid;gap:12px;margin:20px 0 12px}
.auth-provider{display:flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 16px;border:1px solid rgba(244,242,239,.32);border-radius:4px;background:#1E1D20;color:var(--sa-text);font-size:15px;font-weight:600;cursor:pointer}
.auth-provider:hover{border-color:var(--sa-ember)}
.auth-provider[aria-busy=true]{opacity:.8;cursor:progress}
.auth-provider:disabled{opacity:.5;cursor:not-allowed}
.auth-mock-note{margin:0 0 8px;color:var(--sa-sand);font-size:13px}
.auth-consent{margin:12px 0 0;color:var(--sa-muted);font-size:13px;line-height:1.7}
.auth-form .field{margin:0 0 18px}
.auth-form label,.compose-form label{display:block;margin-bottom:6px;font-weight:600}
.auth-form input:not([type=checkbox]),.compose-form input,.compose-form select,.compose-form textarea,.mock-custom input{width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--sa-border);border-radius:4px;background:#0F0F11;color:var(--sa-text)}
.compose-form textarea{resize:vertical;line-height:1.7}
.auth-form input:focus-visible,.compose-form :is(input,select,textarea):focus-visible,.mock-custom input:focus-visible{outline:2px solid var(--sa-ember);outline-offset:1px}
.field-check label{display:flex;align-items:flex-start;gap:10px;font-weight:400;line-height:1.6}
.field-check input{width:20px;height:20px;margin-top:3px;accent-color:var(--sa-ember)}
.field-hint{color:var(--sa-muted);font-size:13px;margin:6px 0 0}
.auth-card .actions,.compose-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:8px}
.compose-actions{justify-content:flex-end}
.account-facts{display:grid;gap:12px;margin:16px 0}
.account-facts div{display:grid;grid-template-columns:7em 1fr;gap:12px}
.account-facts dt{color:var(--sa-muted)}.account-facts dd{margin:0}
.mock-authorize{max-width:640px}
.mock-watermark{position:absolute;right:-12px;top:8px;font-size:72px;font-weight:900;letter-spacing:.1em;color:rgba(244,242,239,.05);pointer-events:none;transform:rotate(-8deg)}
.mock-scopes{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px;padding:0;list-style:none}
.mock-scopes code{padding:2px 8px;border:1px solid var(--sa-border);border-radius:3px}
.mock-identities fieldset{margin:0 0 18px;padding:14px;border:1px solid var(--sa-border);border-radius:4px}
.mock-identities legend{padding:0 6px;color:var(--sa-muted);font-size:13px}
.mock-identity{display:grid;gap:2px;width:100%;min-height:52px;margin:0 0 10px;padding:10px 14px;border:1px solid rgba(244,242,239,.28);border-radius:4px;background:#1E1D20;color:var(--sa-text);text-align:left;cursor:pointer}
.mock-identity span{color:var(--sa-muted);font-size:13px}
.mock-identity:hover{border-color:var(--sa-ember)}
.mock-custom{display:grid;gap:8px}
.mock-scenarios{display:flex;flex-wrap:wrap;gap:10px}
/* compose */
.compose-panel{padding:24px}
.compose-panel .panel-heading h1{margin:0;font-size:1.5rem}
.compose-as{display:flex;flex-wrap:wrap;align-items:center;gap:4px;margin:0 0 16px;color:var(--sa-muted)}
.compose-as strong{color:var(--sa-text)}
.compose-form .field{margin:0 0 18px}
.compose-form .field-meta{display:flex;justify-content:space-between;gap:12px;margin-top:6px;color:var(--sa-muted);font-size:13px}
.compose-form .field-error{display:block;margin-top:6px;color:var(--error,#F0A592);font-size:13px}
.compose-note{margin:0 0 10px;color:var(--sa-muted);font-size:14px}
.hp-field{position:absolute!important;left:-10000px!important;width:1px;height:1px;overflow:hidden}
.t4b-compose-card.is-open .compose-form{margin-top:12px}
.t4b-compose-hint{color:var(--sa-muted);font-size:13px;margin-right:10px}
.t4b-compose-action{display:flex;align-items:center}
@media (max-width:768px){
  .t4b-header .header-inner{grid-template-columns:auto 1fr auto}
  .account-area .account-label,.account-menu .mock-chip,.account-menu summary .role-badge,.account-menu summary .level-chip{display:none}
  .account-login,.account-menu>summary{padding:6px;border-color:transparent;gap:0}
  .auth-card{margin:24px 12px 40px;padding:28px 18px}
  .compose-panel{padding:18px 14px}
  .account-facts div{grid-template-columns:1fr;gap:2px}
  .t4b-compose-hint{display:none}
}
@media (max-width:420px){.t4b-header nav a{padding:6px 6px}}
/* v0.3.0: dismissible success banner + focused new reply (:target ring already from T4b; keep focus outline visible) */
.state-banner { position: relative; }
.state-banner-close { position: absolute; top: .35rem; right: .5rem; min-width: 44px; min-height: 44px; background: none; border: 0; color: inherit; font-size: 1.2rem; cursor: pointer; }
.forum-reply[tabindex="-1"]:focus { outline: 2px solid var(--gold, #c9a45c); outline-offset: 3px; }
/* 網設 11 Email／手機 OTP (§3.1 tabs, §5 +886 field, §7 six-cell code). Panels are CSS-driven by [data-method] so no-JS links work. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.auth-seg{display:flex;gap:0;margin:4px 0 16px;border:1px solid var(--sa-border);border-radius:4px;overflow:hidden}
.auth-seg a{flex:1;min-height:44px;display:flex;align-items:center;justify-content:center;color:var(--sa-muted);text-decoration:none;font-weight:600;font-size:14px}
.auth-seg a+a{border-left:1px solid var(--sa-border)}
.auth-seg a[aria-selected=true]{background:rgba(214,120,62,.16);color:var(--sa-text);box-shadow:inset 0 -2px 0 var(--sa-ember)}
.auth-seg a:focus-visible{outline:2px solid var(--sa-ember);outline-offset:-2px}
.auth-panel{display:none}
.auth-card[data-method=oauth] [data-panel=oauth],.auth-card[data-method=email] [data-panel=email],.auth-card[data-method=phone] [data-panel=phone]{display:block}
.auth-card[data-oauth=on][data-ep=on] .auth-divider,.auth-card[data-oauth=on][data-ep=on] .auth-seg--ep{display:none}
@media (min-width:769px){
  .auth-card[data-oauth=on][data-ep=on] .auth-seg--all{display:none}
  .auth-card[data-oauth=on][data-ep=on] [data-panel=oauth]{display:block}
  .auth-card[data-oauth=on][data-ep=on] .auth-divider{display:flex}
  .auth-card[data-oauth=on][data-ep=on] .auth-seg--ep{display:flex}
  .auth-card[data-oauth=on][data-ep=on][data-method=oauth] [data-panel=email]{display:block}
}
.auth-divider{display:flex;align-items:center;gap:12px;margin:22px 0 14px;color:var(--sa-muted);font-size:13px}
.auth-divider::before,.auth-divider::after{content:"";flex:1;border-top:1px solid var(--sa-border)}
.phone-input{display:flex;align-items:stretch}
.phone-prefix{display:flex;align-items:center;padding:0 12px;border:1px solid var(--sa-border);border-right:0;border-radius:4px 0 0 4px;background:#1E1D20;color:var(--sa-sand);font-variant-numeric:tabular-nums;white-space:nowrap}
.phone-input input{flex:1;min-width:0;border-radius:0 4px 4px 0;font-variant-numeric:tabular-nums;letter-spacing:.04em}
.auth-switch{margin:16px 0 4px;color:var(--sa-muted);font-size:14px}.auth-switch a{color:var(--sa-ember);font-weight:600}
.auth-fineprint{margin:4px 0 0;color:var(--sa-muted);font-size:12px}
.state-banner-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}.state-banner-actions form{margin:0}
.otp-dest{white-space:nowrap}
.auth-form input.otp-code{width:calc(6 * 2.65rem + 2px);max-width:100%;height:56px;padding:0 0 0 .8rem;font:600 28px/1 ui-monospace,Menlo,monospace;letter-spacing:1.6rem;overflow:hidden;
  background:repeating-linear-gradient(90deg,transparent 0 2.65rem,var(--sa-border) 2.65rem calc(2.65rem + 1px)),#1E1D20;border:1px solid var(--sa-border);border-radius:4px;color:var(--sa-text)}
.auth-card .otp-code[aria-invalid=true]{border-color:#E06C5A}
.otp-code:disabled{opacity:.5}
.otp-resend{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
.otp-mock-code{font-variant-numeric:tabular-nums}