:root {
    --registration-ink: #17324d;
    --registration-muted: #637487;
    --registration-line: #dce6ec;
    --registration-paper: #ffffff;
    --registration-surface: #f3f7f8;
    --registration-teal: #087f7b;
    --registration-teal-dark: #075f63;
    --registration-coral: #e47756;
    --registration-shadow: 0 24px 60px rgba(23, 50, 77, 0.12);
}

* { box-sizing: border-box; }

body.registration-page {
    margin: 0;
    color: var(--registration-ink);
    background: linear-gradient(135deg, #edf5f5 0%, #f9f7f2 52%, #eef2f6 100%);
    font-family: "Instrument Sans", "Microsoft JhengHei", sans-serif;
    line-height: 1.5;
}

.registration-page::before {
    content: "";
    display: block;
    height: 8px;
    background: linear-gradient(90deg, var(--registration-teal), var(--registration-coral));
}

.registration-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 52px 0 72px; }
.registration-intro { max-width: 720px; margin-bottom: 34px; }
.eyebrow { margin: 0 0 10px; color: var(--registration-coral); font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; }
.registration-intro h1 { margin: 0 0 12px; font-size: clamp(32px, 5vw, 58px); line-height: 1.06; letter-spacing: 0; }
.registration-intro p:not(.eyebrow) { max-width: 620px; margin: 0; color: var(--registration-muted); font-size: 17px; }
.student-pretest-gate { max-width: 900px; margin: -8px 0 42px; padding: 22px 0 0; border-top: 3px solid var(--registration-teal); }
.registration-form .public-student-pretest-gate { max-width: none; margin: 0 0 30px; padding: 22px 0 24px; border-bottom: 1px solid var(--registration-line); }
.registration-complete { max-width: 760px; margin: 0; padding: 30px 0; border-top: 4px solid var(--registration-teal); }
.registration-complete-eyebrow { margin: 0 0 8px; color: var(--registration-coral); font-size: 12px; font-weight: 700; }
.registration-complete h2 { margin: 0 0 12px; color: var(--registration-ink); font-size: 32px; line-height: 1.2; }
.registration-complete h2:focus { outline: 3px solid rgba(8, 127, 123, 0.3); outline-offset: 5px; }
.registration-complete > p:not(.registration-complete-eyebrow) { max-width: 680px; margin: 0; color: var(--registration-muted); font-size: 16px; overflow-wrap: anywhere; }
.registration-complete-link { margin-top: 20px; text-decoration: none; }
.pretest-eyebrow { margin: 0 0 8px; color: var(--registration-coral); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.student-pretest-gate h2 { margin: 0 0 10px; color: var(--registration-ink); font-size: 28px; line-height: 1.2; letter-spacing: 0; }
.student-pretest-gate > p:not(.pretest-eyebrow, .pretest-school, .pretest-gate-status) { max-width: 720px; margin: 0; color: var(--registration-muted); font-size: 16px; }
.pretest-school { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; margin: 20px 0 0; padding: 10px 0; border-top: 1px solid var(--registration-line); border-bottom: 1px solid var(--registration-line); color: var(--registration-muted); font-size: 13px; }
.pretest-school strong { color: var(--registration-ink); font-size: 15px; overflow-wrap: anywhere; }
.pretest-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; padding: 0; border-bottom: 1px solid var(--registration-line); list-style: none; }
.pretest-steps li { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 12px; align-items: start; min-width: 0; padding: 20px 18px 20px 0; }
.pretest-steps li + li { padding-left: 20px; border-left: 1px solid var(--registration-line); }
.pretest-step-number { display: grid; place-items: center; width: 34px; aspect-ratio: 1; border: 1px solid var(--registration-line); color: var(--registration-muted); font-size: 12px; font-weight: 700; }
.pretest-steps li.is-current .pretest-step-number { border-color: var(--registration-teal); color: #fff; background: var(--registration-teal); }
.pretest-steps strong { display: block; color: var(--registration-ink); font-size: 15px; }
.pretest-steps small { display: block; margin-top: 4px; color: var(--registration-muted); font-size: 13px; }
.pretest-gate-status { min-height: 0; margin: 12px 0 0; color: #9a392e; font-size: 13px; }
.pretest-start-button { min-width: 245px; margin-top: 12px; }
.pretest-start-button:focus-visible { outline: 3px solid rgba(228, 119, 86, 0.45); outline-offset: 3px; }
.registration-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 28px; align-items: start; }
.registration-aside { position: sticky; top: 24px; padding: 8px 0; }
.registration-steps { display: grid; gap: 4px; margin: 0; padding: 0; }
.registration-aside .step { display: grid; grid-template-columns: 34px minmax(0, 1fr); column-gap: 10px; align-items: start; min-width: 0; padding: 16px 0; border-bottom: 1px solid var(--registration-line); color: inherit; text-decoration: none; transition: background-color 160ms ease, border-color 160ms ease; }
.registration-aside .step span { color: #a5b5bf; font-size: 13px; font-weight: 700; }
.registration-aside .step strong { min-width: 0; font-size: 15px; line-height: 1.35; overflow-wrap: anywhere; }
.registration-aside .step:hover, .registration-aside .step:focus-visible { background: #f1f7f7; }
.registration-aside .step:focus-visible { outline: 3px solid rgba(228, 119, 86, 0.35); outline-offset: 2px; }
.registration-aside .step.is-active { background: #e8f4f2; }
.registration-aside .step.is-active span, .registration-aside .step.is-active strong { color: var(--registration-teal); }
.aside-note { margin: 28px 0 0; color: var(--registration-muted); font-size: 13px; }
.registration-page #registration-form { display: block; }
.registration-form { min-width: 0; padding: 28px; background: rgba(255, 255, 255, 0.88); box-shadow: var(--registration-shadow); }
.form-section { padding: 8px 0 34px; border-bottom: 1px solid var(--registration-line); }
.registration-form .form-section { scroll-margin-top: 24px; }
.form-section + .form-section { padding-top: 34px; }
.section-heading { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 22px; }
.section-heading > span { color: var(--registration-coral); font-size: 13px; font-weight: 700; }
.section-heading h2 { margin: 0 0 5px; font-size: 23px; line-height: 1.2; letter-spacing: 0; }
.section-heading p { margin: 0; color: var(--registration-muted); font-size: 13px; }
.role-switch { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.role-option { position: relative; min-width: 0; cursor: pointer; }
.role-option input { position: absolute; opacity: 0; }
.role-option span { display: block; min-height: 76px; padding: 15px 12px; border: 1px solid var(--registration-line); color: var(--registration-ink); font-size: 14px; font-weight: 700; }
.role-option small { display: block; margin-top: 4px; color: var(--registration-muted); font-size: 12px; font-weight: 400; }
.role-option input:checked + span { border-color: var(--registration-teal); background: #e8f4f2; box-shadow: inset 0 -3px 0 var(--registration-teal); }
.role-option input:focus-visible + span { outline: 3px solid rgba(228, 119, 86, 0.35); outline-offset: 2px; }
.field-grid { display: grid; gap: 18px 16px; }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-grid label { display: block; color: var(--registration-ink); font-size: 13px; font-weight: 700; }
.field-grid input, .field-grid select { display: block; width: 100%; min-height: 46px; margin-top: 7px; padding: 11px 12px; border: 1px solid #cbd9e0; border-radius: 0; color: var(--registration-ink); background: var(--registration-paper); font: inherit; font-size: 14px; }
.field-grid input:focus, .field-grid select:focus { border-color: var(--registration-teal); outline: 3px solid rgba(8, 127, 123, 0.14); }
.field-grid input.is-invalid, .field-grid select.is-invalid { border-color: #bd4e43; }
.field-grid label.is-invalid { color: #9a392e; }
.field-grid label.is-invalid > input, .field-grid label.is-invalid > select { border-color: #bd4e43; }
.field-help { display: block; margin-top: 6px; color: var(--registration-muted); font-size: 12px; font-weight: 400; }
.field-grid .principal-choice { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.field-grid .principal-choice input { flex: 0 0 18px; width: 18px; min-height: 18px; height: 18px; margin: 0; padding: 0; accent-color: var(--registration-teal); }
.principal-choice span { min-width: 0; }
.registration-form .span-two { grid-column: span 2; }
.referral-field { min-width: 0; margin: 0; padding: 0; border: 0; }
.referral-field.is-invalid, .elective-field.is-invalid { padding: 10px; border: 1px solid #bd4e43; }
.referral-field legend { margin-bottom: 10px; color: var(--registration-ink); font-size: 13px; font-weight: 700; }
.referral-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.referral-option { display: flex; align-items: flex-start; gap: 9px; min-width: 0; padding: 11px 12px; border: 1px solid var(--registration-line); color: var(--registration-ink); background: var(--registration-paper); cursor: pointer; font-size: 13px; font-weight: 400; }
.referral-option input { flex: 0 0 auto; width: 17px; height: 17px; margin: 1px 0 0; accent-color: var(--registration-teal); }
.referral-option.is-invalid, .elective-option.is-invalid { border-color: #bd4e43; }
.field-grid .referral-option, .field-grid .elective-option { display: flex; align-items: flex-start; }
.field-grid .referral-option input, .field-grid .elective-option input { flex: 0 0 17px; width: 17px; min-width: 17px; min-height: 17px; height: 17px; margin: 1px 0 0; padding: 0; border: 0; }
.field-grid .referral-option span, .field-grid .elective-option span { min-width: 0; overflow-wrap: anywhere; }
.referral-option:has(input:checked) { border-color: var(--registration-teal); background: #e8f4f2; }
.source-other-field { margin-top: 14px; }
.elective-field { min-width: 0; margin: 0; padding: 0; border: 0; }
.elective-field legend { margin-bottom: 4px; color: var(--registration-ink); font-size: 13px; font-weight: 700; }
.elective-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.elective-option { display: flex; align-items: flex-start; gap: 9px; min-width: 0; padding: 11px 12px; border: 1px solid var(--registration-line); color: var(--registration-ink); background: var(--registration-paper); cursor: pointer; font-size: 13px; font-weight: 400 !important; }
.elective-option input { flex: 0 0 auto; width: 17px; min-height: 17px; height: 17px; margin: 1px 0 0; padding: 0; border: 0; accent-color: var(--registration-teal); }
.elective-option span { min-width: 0; overflow-wrap: anywhere; }
.elective-option:has(input:checked) { border-color: var(--registration-teal); background: #e8f4f2; }
.elective-option:has(input:focus-visible) { outline: 3px solid rgba(228, 119, 86, 0.35); outline-offset: 2px; }
.elective-field input[type="hidden"] { display: none; }
.elective-other-field { margin-top: 14px; }
.consent-links { margin: 0 0 16px; color: var(--registration-muted); font-size: 13px; overflow-wrap: anywhere; }
.consent-links a { color: var(--registration-teal-dark); font-weight: 700; text-decoration: underline; }
.privacy-policy-version { font-size: 12px; font-weight: 400; color: var(--registration-muted); }
.context-note { margin: 14px 0 0; padding: 10px 12px; color: var(--registration-teal-dark); background: #e8f4f2; font-size: 13px; }
.check-row { display: flex; align-items: flex-start; gap: 10px; margin: 14px 0; color: var(--registration-muted); font-size: 13px; }
.check-row.is-invalid { outline: 1px solid #bd4e43; outline-offset: 4px; color: #9a392e; }
.check-row input { width: 17px; height: 17px; margin-top: 2px; accent-color: var(--registration-teal); }
.form-status { min-height: 24px; margin: 18px 0 0; color: #9a392e; font-size: 13px; }
.form-status.is-success { color: var(--registration-teal-dark); }
.form-status.is-loading { color: var(--registration-muted); }
.survey-next { margin: 8px 0 18px; padding: 12px; background: #f7eee8; color: var(--registration-ink); font-size: 13px; }
.survey-next a { color: var(--registration-teal-dark); font-weight: 700; }
.submit-button { display: inline-flex; justify-content: space-between; align-items: center; gap: 28px; min-width: 205px; margin-top: 8px; padding: 14px 16px; border: 0; color: #fff; background: var(--registration-teal-dark); cursor: pointer; font: inherit; font-size: 14px; font-weight: 700; }
.submit-button:hover { background: var(--registration-teal); }
.submit-button:disabled { background: #9aabb3; cursor: wait; }
.secondary-button { display: inline-flex; align-items: center; min-height: 42px; margin-top: 16px; padding: 10px 14px; border: 1px solid var(--registration-teal); color: var(--registration-teal-dark); background: transparent; cursor: pointer; font: inherit; font-size: 13px; font-weight: 700; }
.secondary-button:hover { color: #fff; background: var(--registration-teal); }
[hidden] { display: none !important; }

@media (max-width: 820px) {
    .registration-shell { width: min(100% - 28px, 680px); padding-top: 20px; }
    .registration-layout { display: block; }
    .registration-aside { position: static; display: block; margin-bottom: 18px; }
    .registration-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .registration-aside .step { padding: 10px 8px; border-bottom: 2px solid var(--registration-line); }
    .registration-steps .step:last-child:nth-child(odd) { grid-column: 1 / -1; }
    .registration-aside .step.is-active { border-bottom-color: var(--registration-teal); }
    .aside-note { display: none; }
    .registration-form { padding: 22px 18px; }
}

@media (max-width: 560px) {
    .registration-shell { width: min(100% - 20px, 520px); }
    .registration-intro h1 { font-size: 36px; }
    .registration-intro p:not(.eyebrow) { font-size: 15px; }
    .student-pretest-gate { margin: 0 0 28px; padding-top: 18px; }
    .registration-form .public-student-pretest-gate { margin-bottom: 24px; }
    .student-pretest-gate h2 { font-size: 23px; }
    .registration-complete { padding: 22px 0; }
    .registration-complete h2 { font-size: 25px; }
    .registration-complete > p:not(.registration-complete-eyebrow) { font-size: 15px; }
    .student-pretest-gate > p:not(.pretest-eyebrow, .pretest-school, .pretest-gate-status) { font-size: 15px; }
    .pretest-steps { grid-template-columns: 1fr; }
    .pretest-steps li { padding: 15px 0; }
    .pretest-steps li + li { padding-left: 0; border-top: 1px solid var(--registration-line); border-left: 0; }
    .role-switch, .two-columns, .referral-options { grid-template-columns: 1fr 1fr; }
    .elective-options { grid-template-columns: 1fr; }
    .role-option span { min-height: 70px; padding: 12px 9px; font-size: 12px; }
    .registration-form .span-two { grid-column: span 2; }
    .section-heading h2 { font-size: 20px; }
}