/* Teacher login only: parser-loaded by /teacher/login/index.html.
   No public-theme opt-in, protected navigation, auth gate or runtime dependency.
   Reuses the shared annotated CanyonPath scene; no auth/runtime dependency.
   Screen styles leave existing print behavior unchanged. */
@media screen {
  body.rc-teacher-login {
    --login-bg: #031714;
    --login-panel: rgba(5, 48, 40, .96);
    --login-inner: #082d25;
    --login-ink: #f4fbf8;
    --login-muted: #bdd6cd;
    --login-border: rgba(158, 226, 206, .38);
    --login-control-border: #57917c;
    --login-focus: #b6f3de;
    --login-error-bg: #472422;
    --login-error-ink: #ffd6d1;
    --login-error-border: #cf827b;
    --tc-text: var(--login-ink);
    --tc-muted: var(--login-muted);
    --tc-border: var(--login-border);
    color: var(--login-ink);
    background: var(--login-bg);
  }
  body.rc-teacher-login .tc-topbar {
    background: #05251f;
    border-color: var(--login-border);
    color: #f4fbf8;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  body.rc-teacher-login .tc-topbar .tc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    min-width: 44px;
    color: #f4fbf8;
  }
  body.rc-teacher-login .tc-title {
    min-width: 0;
    font-size: .94rem;
    font-weight: 750;
    letter-spacing: -.01em;
  }
  body.rc-teacher-login .tc-sidebar {
    flex-shrink: 0;
    background: linear-gradient(180deg, #062b24, #031c18);
    border-color: var(--login-border);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  body.rc-teacher-login .tc-nav a {
    min-height: 44px;
    color: #bdd6cd;
    opacity: 1;
    font-size: .89rem;
    font-weight: 600;
    transform: none;
  }
  body.rc-teacher-login .tc-nav a:hover {
    color: #f4fbf8;
    background: rgba(87, 175, 145, .16);
    transform: none;
  }
  body.rc-teacher-login .tc-icon { color: #8be6c8; }
  body.rc-teacher-login .tc-main {
    min-width: 0;
    margin: 16px;
    padding: clamp(20px, 4vw, 56px);
    border-radius: 16px;
    border-color: var(--login-border);
    /* Scenery lives on the visible surface, not behind an opaque page panel.
       Only the form card is frosted; the moon and canyon stay clear. */
    background-color: var(--login-bg);
    background-image:
      linear-gradient(180deg, rgba(3, 23, 20, .08) 55%, rgba(3, 23, 20, .68)),
      url('/assets/bg/rc-annotated-canyon-approved.webp?v=20260908-annotated4');
    background-size: cover;
    background-position: 66% center;
    background-repeat: no-repeat;
    box-shadow: 0 10px 28px rgba(0, 12, 10, .18);
  }
  body.rc-teacher-login .login-card {
    max-width: 420px;
    padding: clamp(24px, 3vw, 36px);
    background: var(--login-panel);
    border: 1px solid var(--login-border);
    border-radius: 16px;
    box-shadow: 0 18px 48px rgba(0, 12, 10, .36), inset 0 1px rgba(246, 255, 251, .06);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
  }
  body.rc-teacher-login .login-card .login-title {
    margin: 0 0 26px;
    font-size: clamp(1.8rem, 2.6vw, 2.15rem);
    line-height: 1.18;
    letter-spacing: -.035em;
    color: var(--login-ink);
  }
  body.rc-teacher-login .login-label {
    color: var(--login-muted);
    font-size: .88rem;
    font-weight: 600;
  }
  body.rc-teacher-login .login-input {
    color-scheme: dark;
    min-height: 48px;
    border-color: var(--login-control-border);
    background: var(--login-inner);
    color: var(--login-ink);
    font-family: var(--rc-font);
    font-size: 1rem;
    transition: border-color 120ms ease;
  }
  body.rc-teacher-login .login-input:focus { border-color: var(--login-focus); }
  body.rc-teacher-login .login-button {
    min-height: 48px;
    border: 1px solid #72c8ac;
    background: #0b6852;
    color: #ffffff;
    font-family: var(--rc-font);
    font-weight: 700;
    transition: background-color 120ms ease, border-color 120ms ease;
  }
  body.rc-teacher-login .login-button:hover:not(:disabled) { background: #08513f; }
  body.rc-teacher-login .login-button:disabled { opacity: .6; cursor: not-allowed; }
  body.rc-teacher-login .login-error {
    background: var(--login-error-bg);
    color: var(--login-error-ink);
    border-color: var(--login-error-border);
    line-height: 1.5;
    overflow-wrap: anywhere;
    /* Deliberately no display/visibility rule: the existing login handler owns it. */
  }
  body.rc-teacher-login :where(a, button, input):focus-visible {
    outline: 3px solid var(--login-focus);
    outline-offset: 3px;
  }
  body.rc-teacher-login :is(.tc-topbar, .tc-sidebar) :focus-visible { outline-color: #b6f3de; }
  html[data-theme='light'] body.rc-teacher-login {
    --login-panel: rgba(245, 250, 247, .97);
    --login-inner: #edf6f0;
    --login-ink: #163e32;
    --login-muted: #3e6156;
    --login-control-border: #688d7e;
    --login-focus: #145c45;
    --login-error-bg: #fff1f0;
    --login-error-ink: #922626;
    --login-error-border: #b65050;
  }
  html[data-theme='light'] body.rc-teacher-login .login-input { color-scheme: light; }
}
@media screen and (max-width: 768px) {
  body.rc-teacher-login .tc-main {
    /* Beat the legacy shared shell's mobile margin-left:0!important only here. */
    margin: 10px;
    margin-left: 10px !important;
    width: calc(100% - 20px);
    padding: 18px;
    align-items: flex-start;
    background-position: 66% top;
  }
  body.rc-teacher-login .login-container { padding-block: 140px 28px; }
  body.rc-teacher-login .login-card { padding: 24px 20px; }
  body.rc-teacher-login .tc-title { font-size: .86rem; }
  body.rc-teacher-login .tc-topbar { padding-inline: 6px; gap: 4px; }
  /* Preserve the inline toggle's tc-collapsed contract, but use an in-flow
     compact rail on phones: no initially-open overlay concealing the form. */
  body.rc-teacher-login .tc-sidebar,
  html:not(.tc-collapsed) body.rc-teacher-login .tc-sidebar,
  html.tc-collapsed body.rc-teacher-login .tc-sidebar {
    position: sticky;
    width: var(--tc-rail-w);
    transform: none;
  }
  body.rc-teacher-login .tc-sidebar .tc-label { display: none; }
  body.rc-teacher-login .tc-nav { padding-inline: 8px; }
  body.rc-teacher-login .tc-nav a { justify-content: center; padding-inline: 8px; }
  html.tc-collapsed body.rc-teacher-login .tc-sidebar { display: none; }
  html:not(.tc-collapsed) body.rc-teacher-login .tc-shell::before { content: none; }
}
@media screen and (max-height: 600px) {
  body.rc-teacher-login .tc-main { align-items: flex-start; }
  body.rc-teacher-login .login-container { padding-block: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  body.rc-teacher-login :is(.tc-sidebar, .tc-nav a, .login-input, .login-button) { transition: none; }
}
@media (forced-colors: active) {
  body.rc-teacher-login :is(.tc-main, .tc-sidebar) { background-image: none; }
  body.rc-teacher-login :is(.login-card, .login-input, .login-button, .login-error) {
    background: Canvas;
    color: CanvasText;
    border: 1px solid CanvasText;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}