:root {
    --color-primary: #3366cc;
    --color-primary-dark: #1f4f81;
    --color-bg: #f1f5f9;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-danger: #ee5a52;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

body.reg-body {
    font-family: 'Outfit', 'Poppins', ui-sans-serif, system-ui, sans-serif;
    color: var(--color-text-primary);
    background: var(--color-bg);
    overflow-x: hidden;
}

.reg-screen {
    min-height: 100dvh;
    padding:
        max(1rem, env(safe-area-inset-top, 0px))
        max(1rem, env(safe-area-inset-right, 0px))
        max(1.5rem, env(safe-area-inset-bottom, 0px))
        max(1rem, env(safe-area-inset-left, 0px));
}

.reg-wrap {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
}

.reg-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.reg-brand-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.reg-brand .theme-switcher-slot {
    flex: 0 0 auto;
    max-width: 12rem;
}

.reg-brand img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.reg-brand h1 {
    margin: 0;
    font-size: clamp(1.25rem, 3vw, 1.6rem);
    font-weight: 800;
    color: var(--color-primary-dark);
}

.reg-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 1.25rem;
    box-shadow: 0 20px 50px -20px rgba(15, 23, 42, 0.18);
    padding: 1.25rem;
}

@media (min-width: 768px) {
    .reg-card {
        padding: 2rem;
        border-radius: 1.5rem;
    }
}

.reg-card h2 {
    margin: 0 0 0.35rem;
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 800;
}

.reg-lead {
    margin: 0 0 1.5rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.reg-section {
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.reg-section h3 {
    margin: 0 0 1rem;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-primary-dark);
}

.reg-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 700px) {
    .reg-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .reg-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.reg-field label,
.reg-legend {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.reg-field input,
.reg-field select,
.reg-field textarea {
    width: 100%;
    max-width: 100%;
    padding: 0.75rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    font: inherit;
    font-size: 16px;
    background: #fff;
    color: var(--color-text-primary);
}

.reg-field textarea { min-height: 88px; resize: vertical; }

.reg-field input:focus,
.reg-field select:focus,
.reg-field textarea:focus {
    outline: 2px solid var(--color-primary);
    border-color: transparent;
}

.reg-field .is-invalid {
    border-color: var(--color-danger);
}

.reg-error {
    margin-top: 0.35rem;
    color: var(--color-danger);
    font-size: 0.8rem;
    font-weight: 600;
}

.reg-alert {
    margin-bottom: 1.25rem;
    padding: 0.9rem 1rem;
    border-radius: 0.75rem;
    background: #fee2e2;
    color: var(--color-danger);
    font-size: 0.9rem;
}

.reg-alert ul {
    margin: 0.4rem 0 0;
    padding-left: 1.1rem;
}

.student-card {
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 1rem;
    background: #f8fafc;
}

.student-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.student-card-head h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.reg-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
}

.reg-check {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.reg-radios {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.75rem 1rem;
    flex-shrink: 0;
}

.reg-statement-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.85rem;
    overflow-x: auto;
}

.reg-statement {
    margin: 0;
    flex: 1 0 auto;
    font-size: clamp(0.7rem, 1.05vw, 0.88rem);
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-text-primary);
    white-space: nowrap;
}

.reg-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.reg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.7rem 1.1rem;
    border: none;
    border-radius: 0.85rem;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    text-decoration: none;
}

.reg-btn-primary {
    width: 100%;
    color: #fff;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark));
}

.reg-btn-ghost {
    background: #fff;
    color: var(--color-primary-dark);
    border: 1px solid var(--color-border);
}

.reg-btn-danger {
    background: #fff;
    color: var(--color-danger);
    border: 1px solid #fecaca;
}

.reg-footer {
    margin-top: 1.25rem;
    text-align: center;
}

.reg-footer a {
    color: var(--color-primary);
    font-weight: 700;
    text-decoration: none;
}

.reg-thanks {
    text-align: center;
    padding: 2rem 0.5rem;
}

.reg-ref {
    display: inline-block;
    margin: 1rem 0;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--color-primary) 12%, #fff);
    color: var(--color-primary-dark);
    font-weight: 800;
    letter-spacing: 0.06em;
}