:root{--ka-ink:#13213a;--ka-muted:#66738c;--ka-line:#dce4f0;--ka-blue:#2868f0;--ka-violet:#8150ee;--ka-bg:#f6f8fc;--ka-card:#fff;--ka-soft:#f4f7fb;--ka-danger:#a32d38}
.kourse-auth-template{margin:0;background:var(--ka-bg);color:var(--ka-ink);font-family:var(--k-font-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif)}
.kourse-auth-main{min-height:100vh;box-sizing:border-box;padding:42px 20px 56px;background:radial-gradient(circle at 80% 8%,rgba(129,80,238,.10),transparent 28%),radial-gradient(circle at 15% 90%,rgba(40,104,240,.08),transparent 30%),var(--ka-bg)}
.kauth-shell{width:min(100%,520px);margin:0 auto}.kauth-shell.kauth-compact{width:min(100%,460px)}
.kauth-header{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;min-height:42px;margin-bottom:26px}.kauth-header>a{color:var(--ka-blue);font-size:12px;font-weight:800;text-decoration:none}.kauth-context{justify-self:end;color:var(--ka-muted);font-size:12px;font-weight:700}.kauth-brand{display:flex;align-items:center;justify-content:center;gap:10px;color:var(--ka-ink);text-decoration:none;font-size:22px}.kauth-brand-mark{width:32px;height:32px;display:block;object-fit:contain}.kauth-card{background:var(--ka-card);border:1px solid var(--ka-line);border-radius:22px;padding:34px;box-shadow:0 22px 65px rgba(31,42,68,.10)}
.kauth-eyebrow{display:block;margin-bottom:7px;color:var(--ka-blue);font-size:11px;font-weight:850;letter-spacing:.14em}.kauth-card h1{margin:0 0 8px;color:var(--ka-ink);font-size:30px;line-height:1.12;letter-spacing:-.035em}.kauth-card>p{margin:0 0 24px;color:var(--ka-muted);font-size:15px;line-height:1.55}.kauth-card form{display:grid;gap:16px}.kauth-card label{display:grid;gap:7px;color:var(--ka-ink);font-size:13px;font-weight:750}.kauth-card small{color:var(--ka-muted);font-size:11px;font-weight:500}.kauth-card input:not([type=checkbox]){width:100%;box-sizing:border-box;border:1px solid #ccd6e6;border-radius:11px;padding:12px 13px;background:#fff;color:var(--ka-ink);font:inherit;outline:none}.kauth-card input:focus{border-color:var(--ka-blue);box-shadow:0 0 0 3px rgba(40,104,240,.13)}.kauth-two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.kauth-password{position:relative;display:block}.kauth-password input{padding-right:62px!important}.kauth-reveal{position:absolute;right:7px;top:50%;transform:translateY(-50%);width:auto!important;padding:6px 8px!important;border:0!important;border-radius:7px!important;background:transparent!important;color:var(--ka-blue)!important;font-size:11px!important}.kauth-row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px}.kauth-row a,.kauth-switch a,.kauth-back{color:var(--ka-blue);font-weight:750;text-decoration:none}.kauth-check{display:flex!important;align-items:center;gap:8px!important;color:var(--ka-muted)!important;font-weight:500!important}.kauth-submit,.kauth-card form>button,.kauth-primary-link{display:block;width:100%;box-sizing:border-box;border:0;border-radius:11px;padding:13px 16px;background:linear-gradient(100deg,var(--ka-blue),var(--ka-violet));color:#fff;font:inherit;font-weight:800;text-align:center;text-decoration:none;cursor:pointer}.kauth-secondary{display:block;box-sizing:border-box;border:1px solid #ccd6e6;border-radius:11px;padding:12px;color:var(--ka-ink);font-weight:750;text-align:center;text-decoration:none}.kauth-switch{margin:20px 0 0!important;text-align:center!important;font-size:13px}.kauth-divider{display:flex;align-items:center;gap:12px;margin:20px 0 14px;color:#8a94a6;font-size:12px}.kauth-divider:before,.kauth-divider:after{content:"";height:1px;background:var(--ka-line);flex:1}.kauth-help{margin-top:18px;padding:12px 13px;border-radius:11px;background:var(--ka-soft);color:var(--ka-muted);font-size:12px;line-height:1.5}.kauth-back{display:block;margin-top:18px;text-align:center;font-size:13px}.kauth-error{margin:0 0 18px;padding:10px 12px;border:1px solid #efb9bf;border-radius:10px;background:#fff4f5;color:var(--ka-danger);font-size:13px}.kauth-provider{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;box-sizing:border-box;border:1px solid #cbd5e4;border-radius:11px;padding:12px 14px;background:#fff;color:var(--ka-ink);font-weight:750;text-decoration:none}.kauth-provider:hover,.kauth-secondary:hover{background:#f8faff}.kauth-google-mark{width:18px;height:18px;display:inline-grid;place-items:center;font-size:16px;font-weight:900;color:#4285f4}.kauth-provider-note{margin:10px 0 0;color:var(--ka-muted);font-size:11px;text-align:center}.kauth-choice{display:grid;gap:10px}.kauth-card button:focus-visible,.kourse-auth-template a:focus-visible{outline:3px solid rgba(40,104,240,.28);outline-offset:3px}
html.kourse-dark .kourse-auth-template{--ka-ink:#eef3fb;--ka-muted:#a9b5c8;--ka-line:#334157;--ka-bg:#0d1421;--ka-card:#151e2d;--ka-soft:#101827}html.kourse-dark .kourse-auth-main{background:radial-gradient(circle at 80% 8%,rgba(129,80,238,.13),transparent 28%),radial-gradient(circle at 15% 90%,rgba(40,104,240,.10),transparent 30%),var(--ka-bg)}html.kourse-dark .kauth-card input:not([type=checkbox]),html.kourse-dark .kauth-provider{background:#101827;border-color:#3a4860;color:var(--ka-ink)}html.kourse-dark .kauth-secondary{border-color:#3a4860;color:var(--ka-ink)}html.kourse-dark .kauth-error{background:#311b22;border-color:#6d3440;color:#ffc1c8}
@media(max-width:600px){.kourse-auth-main{padding:20px 14px 34px}.kauth-header{grid-template-columns:1fr auto;margin-bottom:18px}.kauth-brand{grid-column:1/-1;grid-row:1;justify-self:center}.kauth-header>a{grid-column:1;grid-row:2}.kauth-context{grid-column:2;grid-row:2}.kauth-card{padding:26px 20px;border-radius:18px}.kauth-card h1{font-size:27px}.kauth-two{grid-template-columns:1fr}.kauth-row{align-items:flex-start;flex-direction:column}}
/* 18.0 unified authentication: signed-out entry is intentionally light and uses one geometry. */
.kourse-auth-document{color-scheme:light!important}.kourse-auth-template{--ka-ink:#10213d!important;--ka-muted:#667795!important;--ka-line:#d8e1ef!important;--ka-bg:#f5f7fc!important;--ka-card:#fff!important;--ka-soft:#f4f7fb!important;background:var(--ka-bg)!important;color:var(--ka-ink)!important}.kourse-auth-main{background:radial-gradient(circle at 82% 10%,rgba(129,80,238,.10),transparent 29%),radial-gradient(circle at 14% 88%,rgba(40,104,240,.08),transparent 31%),var(--ka-bg)!important}.kauth-shell,.kauth-shell.kauth-compact{width:min(100%,540px)!important}.kauth-header{margin-bottom:14px!important}.kauth-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin:0 0 14px;padding:5px;border:1px solid var(--ka-line);border-radius:14px;background:rgba(255,255,255,.72);box-shadow:0 8px 24px rgba(31,42,68,.04)}.kauth-tabs a{padding:9px 8px;border-radius:10px;color:var(--ka-muted);font-size:12px;font-weight:800;text-align:center;text-decoration:none}.kauth-tabs a.is-active{background:#fff;color:var(--ka-ink);box-shadow:0 2px 10px rgba(31,42,68,.10)}.kauth-card{padding:32px!important}.kauth-card h1{color:var(--ka-ink)!important}.kauth-card input:not([type=checkbox]),.kauth-provider{background:#fff!important;color:var(--ka-ink)!important;border-color:#ccd6e6!important}.kauth-secondary{color:var(--ka-ink)!important;border-color:#ccd6e6!important}.kauth-home{white-space:nowrap}.kauth-context{white-space:nowrap}html.kourse-dark .kourse-auth-template,html.kourse-dark .kourse-auth-main{color-scheme:light!important;--ka-ink:#10213d!important;--ka-muted:#667795!important;--ka-line:#d8e1ef!important;--ka-bg:#f5f7fc!important;--ka-card:#fff!important;--ka-soft:#f4f7fb!important;background:var(--ka-bg)!important;color:var(--ka-ink)!important}html.kourse-dark .kauth-card input:not([type=checkbox]),html.kourse-dark .kauth-provider{background:#fff!important;border-color:#ccd6e6!important;color:var(--ka-ink)!important}html.kourse-dark .kauth-secondary{border-color:#ccd6e6!important;color:var(--ka-ink)!important}
@media(max-width:600px){.kauth-header{grid-template-columns:1fr auto!important}.kauth-tabs{grid-template-columns:1fr!important}.kauth-tabs a{padding:8px}.kauth-card{padding:26px 20px!important}}

/* 18.1 student identity */
.kauth-student-create{margin-top:12px}.kauth-optional{color:var(--ka-muted);font-size:11px;font-weight:600;margin-left:4px}
/* 19.0 Authentication Experience — one Account page, two decisions: action + role. */
.kauth-access{margin:0 0 14px;padding:6px;border:1px solid var(--ka-line);border-radius:18px;background:rgba(255,255,255,.82);box-shadow:0 12px 32px rgba(31,42,68,.06)}
.kauth-primary-tabs,.kauth-role-tabs{display:grid;gap:5px}.kauth-primary-tabs{grid-template-columns:1fr 1fr}.kauth-role-tabs{grid-template-columns:1fr 1fr;margin-top:6px;padding-top:6px;border-top:1px solid #e8edf5}
.kauth-primary-tabs a,.kauth-role-tabs a{display:block;border-radius:11px;text-align:center;text-decoration:none;font-weight:800;transition:background .15s ease,box-shadow .15s ease,color .15s ease}
.kauth-primary-tabs a{padding:10px 12px;color:var(--ka-muted);font-size:13px}.kauth-primary-tabs a.is-active{background:#fff;color:var(--ka-ink);box-shadow:0 3px 12px rgba(31,42,68,.10)}
.kauth-role-tabs a{padding:8px 10px;color:#71809b;font-size:11px}.kauth-role-tabs a.is-active{background:#edf3ff;color:var(--ka-blue)}
.kauth-card{box-shadow:0 24px 70px rgba(31,42,68,.11)!important}.kauth-card>p{max-width:46ch}.kauth-help{border:1px solid #e6ebf4;background:#f7f9fc}.kauth-student-create{margin-top:10px}
.kauth-tabs{display:none!important}
@media(max-width:600px){.kauth-access{border-radius:15px}.kauth-primary-tabs a{font-size:12px}.kauth-role-tabs a{font-size:10.5px}}

/* 20.0 Account Experience — simplified premium entry. */
.kauth-access{display:none!important}
.kauth-role-switch{display:flex;align-items:center;justify-content:center;gap:8px;margin:18px -34px -34px;padding:16px 24px;border-top:1px solid var(--ka-line);border-radius:0 0 22px 22px;background:#f8faff;color:var(--ka-muted);font-size:12px}
.kauth-role-switch a{color:var(--ka-blue);font-weight:800;text-decoration:none}
.kauth-role-switch a:hover{text-decoration:underline}
.kauth-card{overflow:hidden}
@media(max-width:600px){.kauth-role-switch{margin:18px -20px -26px;border-radius:0 0 18px 18px}}

/* 23.3 recovery polish: use the same Schoolbrook type system and message geometry. */
.kourse-auth-template,.kourse-auth-template button,.kourse-auth-template input,.kourse-auth-template select,.kourse-auth-template textarea{font-family:var(--k-font-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif)!important}
.kauth-success{margin:0 0 18px;padding:11px 12px;border:1px solid #b9e2d2;border-radius:10px;background:#f0fbf7;color:#176c51;font-size:13px;line-height:1.45;font-weight:650}
.kauth-card label{line-height:1.35}.kauth-card form{margin-top:2px}


/* 26.5 Unified Auth Shell — canonical signed-out account experience. */
.kauth-shell{width:min(100%,560px)!important}
.kauth-access{display:block!important;margin:0 0 14px!important;padding:6px!important;border:1px solid var(--ka-line)!important;border-radius:18px!important;background:rgba(255,255,255,.78)!important;box-shadow:0 12px 32px rgba(31,42,68,.06)!important}
.kauth-primary-tabs,.kauth-role-tabs{display:grid!important;grid-template-columns:1fr 1fr!important;gap:5px!important}
.kauth-role-tabs{margin-top:6px!important;padding-top:6px!important;border-top:1px solid #e8edf5!important}
.kauth-primary-tabs a,.kauth-role-tabs a{display:flex!important;align-items:center!important;justify-content:center!important;min-height:38px!important;padding:0 12px!important;border-radius:11px!important;text-decoration:none!important;font-weight:800!important;line-height:1.2!important}
.kauth-primary-tabs a{color:var(--ka-muted)!important;font-size:13px!important}.kauth-primary-tabs a.is-active{background:#fff!important;color:var(--ka-ink)!important;box-shadow:0 3px 12px rgba(31,42,68,.10)!important}
.kauth-role-tabs a{color:#71809b!important;font-size:11.5px!important}.kauth-role-tabs a.is-active{background:#edf3ff!important;color:var(--ka-blue)!important}
.kauth-card{padding:32px!important;border-radius:22px!important;box-shadow:0 24px 70px rgba(31,42,68,.11)!important;overflow:hidden!important}
.kauth-card input:not([type=checkbox]){background:#fff!important;border:1px solid #ccd6e6!important;color:var(--ka-ink)!important;box-shadow:none!important}
.kauth-card input:not([type=checkbox]):-webkit-autofill,.kauth-card input:not([type=checkbox]):-webkit-autofill:hover,.kauth-card input:not([type=checkbox]):-webkit-autofill:focus{-webkit-text-fill-color:var(--ka-ink)!important;-webkit-box-shadow:0 0 0 1000px #fff inset!important;box-shadow:0 0 0 1000px #fff inset!important;transition:background-color 9999s ease-out 0s!important}
.kauth-card input:not([type=checkbox]):focus{border-color:var(--ka-blue)!important;box-shadow:0 0 0 3px rgba(40,104,240,.13)!important}
.kauth-check input{width:16px!important;height:16px!important;accent-color:var(--ka-blue)}
/* Primary account modes use the switcher above the card; remove obsolete in-card navigation. */
.kauth-access + .kauth-card .kauth-switch,.kauth-access + .kauth-card .kauth-role-switch,.kauth-access + .kauth-card > .kauth-back{display:none!important}
@media(max-width:600px){.kauth-shell{width:100%!important}.kauth-access{border-radius:15px!important}.kauth-primary-tabs a{font-size:12px!important}.kauth-role-tabs a{font-size:11px!important}.kauth-card{padding:26px 20px!important}}

/* 26.6 Unified Auth Application — mode switches are state, never navigation. */
.kauth-primary-app{display:block}.kauth-panel-stack{display:block}.kauth-mode-panel[hidden]{display:none!important}.kauth-mode-panel.is-active{display:block}
.kauth-primary-tabs button,.kauth-role-tabs button{display:flex!important;align-items:center!important;justify-content:center!important;min-height:38px!important;padding:0 12px!important;border:0!important;border-radius:11px!important;background:transparent!important;box-shadow:none!important;color:var(--ka-muted)!important;font:inherit!important;font-weight:800!important;line-height:1.2!important;cursor:pointer!important}
.kauth-primary-tabs button{font-size:13px!important}.kauth-primary-tabs button.is-active{background:#fff!important;color:var(--ka-ink)!important;box-shadow:0 3px 12px rgba(31,42,68,.10)!important}
.kauth-role-tabs button{color:#71809b!important;font-size:11.5px!important}.kauth-role-tabs button.is-active{background:#edf3ff!important;color:var(--ka-blue)!important}
.kauth-primary-app .kauth-card .kauth-switch,.kauth-primary-app .kauth-card .kauth-role-switch,.kauth-primary-app .kauth-card>.kauth-back,.kauth-primary-app .kauth-card>.kauth-help,.kauth-primary-app .kauth-student-create{display:none!important}
@media(max-width:600px){.kauth-primary-tabs button{font-size:12px!important}.kauth-role-tabs button{font-size:11px!important}}


/* 27.2 Auth control rebuild — progressive enhancement + one consistent segmented-control language. */
.kauth-primary-tabs a,.kauth-role-tabs a{display:flex!important;align-items:center!important;justify-content:center!important;min-height:40px!important;padding:0 14px!important;border:1px solid transparent!important;border-radius:11px!important;background:transparent!important;box-shadow:none!important;color:var(--ka-muted)!important;font:inherit!important;font-size:12.5px!important;font-weight:800!important;line-height:1.2!important;text-decoration:none!important;cursor:pointer!important;transition:background .15s ease,border-color .15s ease,box-shadow .15s ease,color .15s ease!important}
.kauth-primary-tabs a:hover,.kauth-role-tabs a:hover{background:#f4f7fc!important;color:var(--ka-ink)!important}
.kauth-primary-tabs a.is-active,.kauth-role-tabs a.is-active{background:#fff!important;border-color:#dfe6f2!important;color:var(--ka-blue)!important;box-shadow:0 3px 12px rgba(31,42,68,.10)!important}
.kauth-primary-tabs,.kauth-role-tabs{min-width:0!important}
.kauth-primary-tabs a,.kauth-role-tabs a{min-width:0!important}


/* 27.3 Authentication reliability rebuild. Navigation is native/server-driven. */
.kauth-access,.kauth-card{position:relative!important;z-index:1!important}
.kauth-access a,.kauth-card a,.kauth-card button{pointer-events:auto!important;position:relative!important;z-index:2!important}
.kauth-primary-tabs a,.kauth-role-tabs a{user-select:none!important;-webkit-user-select:none!important}
.kauth-card form>button,.kauth-primary-link,.kauth-secondary{min-height:46px!important;display:flex!important;align-items:center!important;justify-content:center!important;border-radius:11px!important;font-weight:800!important;cursor:pointer!important}
.kauth-card form>button,.kauth-primary-link{background:linear-gradient(100deg,var(--ka-blue),var(--ka-violet))!important;color:#fff!important;border:0!important}
.kauth-secondary{background:#fff!important;color:var(--ka-ink)!important;border:1px solid #ccd6e6!important}
.kauth-row a,.kauth-switch a,.kauth-back{display:inline-flex!important;align-items:center!important;min-height:32px!important;padding:4px 2px!important;cursor:pointer!important}


/* 27.4 Auth visual/state reliability rebuild. */
.kauth-card .kauth-password{position:relative!important;display:block!important;width:100%!important}
.kauth-card .kauth-password input{display:block!important;width:100%!important;padding-right:64px!important}
.kauth-card .kauth-password .kauth-reveal{position:absolute!important;right:8px!important;top:50%!important;transform:translateY(-50%)!important;z-index:4!important;display:inline-flex!important;align-items:center!important;justify-content:center!important;width:auto!important;min-width:44px!important;min-height:30px!important;margin:0!important;padding:4px 7px!important;border:0!important;background:transparent!important;color:var(--ka-blue)!important;box-shadow:none!important;font-size:11px!important;font-weight:650!important;line-height:1!important}
.kauth-card .kauth-check input[type=checkbox]{appearance:none!important;-webkit-appearance:none!important;width:17px!important;height:17px!important;margin:0!important;border:1.5px solid #aebbd0!important;border-radius:4px!important;background:#fff!important;box-shadow:0 1px 2px rgba(31,42,68,.06)!important;display:grid!important;place-content:center!important;cursor:pointer!important}
.kauth-card .kauth-check input[type=checkbox]:checked{border-color:var(--ka-blue)!important;background:var(--ka-blue)!important}
.kauth-card .kauth-check input[type=checkbox]:checked:after{content:"✓"!important;color:#fff!important;font-size:12px!important;font-weight:900!important;line-height:1!important}
.kauth-card .kauth-check input[type=checkbox]:focus-visible{outline:3px solid rgba(40,104,240,.20)!important;outline-offset:2px!important}