:root {
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #17243a;
    background: #eef3f9;
    font-synthesis: none;
}

* {
    box-sizing: border-box;
}

body {
    min-width: 20rem;
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 15% 10%, rgb(63 114 175 / 18%), transparent 30rem),
        linear-gradient(145deg, #f8fbff 0%, #e8eff8 100%);
}

body.professor-login {
    background:
        radial-gradient(circle at 15% 10%, rgb(42 140 130 / 20%), transparent 30rem),
        linear-gradient(145deg, #f7fcfb 0%, #e4f1ef 100%);
}

.professor-login .site-header {
    background: linear-gradient(120deg, #123c3c, #1f6b68 65%, #2a8c82);
    box-shadow: 0 0.25rem 1.5rem rgb(18 60 60 / 22%);
}

.professor-login .brand-eyebrow {
    color: #d5f1ed;
}

.professor-login .login-card {
    border-color: rgb(42 140 130 / 18%);
    box-shadow: 0 1.5rem 4rem rgb(18 60 60 / 14%);
}

.professor-login .section-label,
.professor-login .login-switch {
    color: #20756f;
}

.professor-login .form-field input:focus {
    border-color: #2a8c82;
    box-shadow: 0 0 0 0.22rem rgb(42 140 130 / 18%);
}

.professor-login .login-form button {
    background: #20756f;
    box-shadow: 0 0.5rem 1.2rem rgb(32 117 111 / 24%);
}

.professor-login .login-form button:hover {
    background: #175b57;
}

.professor-login .login-switch:hover {
    color: #123c3c;
}

button,
input {
    font: inherit;
}

.page-shell {
    display: grid;
    min-height: 100vh;
    grid-template-rows: auto 1fr auto;
}

.site-header {
    padding: 1.25rem clamp(1rem, 4vw, 4rem);
    color: #fff;
    background: linear-gradient(120deg, #112d4e, #285a91 65%, #3f72af);
    box-shadow: 0 0.25rem 1.5rem rgb(17 45 78 / 20%);
}

.brand {
    display: flex;
    width: min(70rem, 100%);
    margin: 0 auto;
    align-items: center;
    gap: 1rem;
}

.brand-logo {
    width: 3.5rem;
    height: 3.5rem;
    object-fit: contain;
    padding: 0.25rem;
    border-radius: 0.75rem;
    background: #fff;
}

.brand-eyebrow {
    margin: 0 0 0.2rem;
    color: #dbe8f7;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-size: clamp(1.25rem, 3vw, 1.8rem);
    line-height: 1.2;
}

.login-main {
    display: grid;
    width: 100%;
    padding: clamp(2rem, 7vw, 5rem) 1rem;
    place-items: center;
}

.login-card {
    width: min(31rem, 100%);
    padding: clamp(1.5rem, 5vw, 2.5rem);
    border: 1px solid rgb(63 114 175 / 14%);
    border-radius: 1.25rem;
    background: rgb(255 255 255 / 96%);
    box-shadow: 0 1.5rem 4rem rgb(17 45 78 / 14%);
}

.section-label {
    margin-bottom: 0.45rem;
    color: #3f72af;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

h2 {
    margin-bottom: 0.75rem;
    color: #112d4e;
    font-size: clamp(1.7rem, 5vw, 2.2rem);
}

.login-introduction > p:not(.section-label) {
    color: #516176;
    line-height: 1.6;
}

.schedule-notice {
    display: grid;
    gap: 0.3rem;
    margin: 1.5rem 0;
    padding: 1rem 1.1rem;
    border-left: 0.25rem solid #3f72af;
    border-radius: 0 0.75rem 0.75rem 0;
    background: #eef5fc;
    color: #31445d;
}

.schedule-notice strong {
    color: #112d4e;
}

.schedule-notice ul {
    margin: 0.35rem 0 0;
    padding-left: 1.2rem;
}

.login-error {
    margin: 1rem 0;
    padding: 0.85rem 1rem;
    border: 1px solid #e9a4a4;
    border-radius: 0.65rem;
    background: #fff1f1;
    color: #8c1f1f;
    font-weight: 650;
}

.login-form {
    display: grid;
    gap: 1.15rem;
}

.form-field {
    display: grid;
    gap: 0.45rem;
}

.form-field label {
    color: #253b56;
    font-size: 0.92rem;
    font-weight: 700;
}

.form-field input {
    width: 100%;
    min-height: 3rem;
    padding: 0.75rem 0.9rem;
    border: 1px solid #aebed0;
    border-radius: 0.65rem;
    outline: none;
    background: #fff;
    color: #17243a;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.form-field input:focus {
    border-color: #3f72af;
    box-shadow: 0 0 0 0.22rem rgb(63 114 175 / 18%);
}

.login-form button {
    min-height: 3rem;
    margin-top: 0.25rem;
    padding: 0.75rem 1.25rem;
    border: 0;
    border-radius: 0.65rem;
    color: #fff;
    background: #285a91;
    box-shadow: 0 0.5rem 1.2rem rgb(40 90 145 / 24%);
    font-weight: 750;
    cursor: pointer;
    transition: background-color 150ms ease, transform 150ms ease;
}

.login-form button:hover {
    background: #1e4774;
    transform: translateY(-1px);
}

.login-form button:focus-visible {
    outline: 0.2rem solid rgb(63 114 175 / 35%);
    outline-offset: 0.2rem;
}

.login-switch {
    display: block;
    width: fit-content;
    margin: 1.5rem auto 0;
    color: #285a91;
    font-size: 0.9rem;
    font-weight: 700;
    text-underline-offset: 0.2em;
}

.login-switch:hover {
    color: #112d4e;
}

.login-switch:focus-visible {
    border-radius: 0.2rem;
    outline: 0.2rem solid rgb(63 114 175 / 30%);
    outline-offset: 0.2rem;
}

.logout-card > p:not(.section-label) {
    color: #516176;
    line-height: 1.6;
}

.logout-actions {
    display: flex;
    margin-top: 1.75rem;
    align-items: center;
    gap: 1rem;
}

.logout-actions form {
    margin: 0;
}

.logout-confirm,
.logout-cancel {
    display: inline-flex;
    min-height: 2.8rem;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1rem;
    border-radius: 0.65rem;
    font-weight: 750;
}

.logout-confirm {
    border: 0;
    color: #fff;
    background: #a72f3a;
    cursor: pointer;
}

.logout-confirm:hover {
    background: #84232c;
}

.logout-cancel {
    color: #285a91;
    text-decoration: none;
}

.professor-login .logout-cancel {
    color: #20756f;
}

.logout-confirm:focus-visible,
.logout-cancel:focus-visible {
    outline: 0.2rem solid rgb(63 114 175 / 30%);
    outline-offset: 0.2rem;
}

.migration-card {
    width: min(40rem, 100%);
}

.migration-summary {
    display: grid;
    gap: 0.65rem;
    margin: 0 0 1.5rem;
}

.migration-summary div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid #dbe6e4;
}

.migration-summary dt {
    color: #516176;
}

.migration-summary dd {
    margin: 0;
    color: #123c3c;
    font-size: 1.2rem;
    font-weight: 800;
}

.migration-success {
    padding: 1rem;
    border: 1px solid #75b9a7;
    border-radius: 0.65rem;
    background: #e8f7f2;
    color: #165f51;
    font-weight: 750;
}

.site-footer {
    padding: 1.25rem 1rem;
    color: #5d6e82;
    font-size: 0.82rem;
    text-align: center;
}

@media (max-width: 36rem) {
    .site-header {
        padding-block: 1rem;
    }

    .brand-logo {
        width: 3rem;
        height: 3rem;
    }

    .login-main {
        padding-block: 1.5rem;
    }

    .login-card {
        border-radius: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}