/* ==========================================================================
   Registration Page Layout
   ========================================================================== */

.registration-page {
    background: var(--color-background);
}

.registration-hero {
    position: relative;
    overflow: hidden;
    padding: 78px 0 54px;
    background:
        radial-gradient(circle at 12% 20%, rgba(245, 158, 11, 0.14), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #f8fafc 52%, #eef4ff 100%);
}

.registration-hero::after {
    content: "";
    position: absolute;
    right: -120px;
    top: 24px;
    width: min(52vw, 520px);
    aspect-ratio: 1;
    background: rgba(30, 58, 138, 0.045);
    clip-path: polygon(50% 0%, 98% 35%, 79% 93%, 21% 93%, 2% 35%);
    transform: rotate(-12deg);
}

.registration-hero__container {
    position: relative;
    z-index: 1;
    max-width: 860px;
    text-align: center;
}

.registration-eyebrow {
    margin-bottom: 10px;
    color: var(--color-secondary-dark);
    font-size: 0.86rem;
    font-weight: 800;
    text-transform: uppercase;
}

.registration-hero__title {
    color: var(--color-text);
    font-size: clamp(2.3rem, 6vw, 4rem);
    font-weight: 800;
}

.registration-hero__text {
    max-width: 700px;
    margin: 18px auto 0;
    color: var(--color-muted);
    font-size: 1.06rem;
}

.registration-section {
    padding: 64px 0 86px;
}

.registration-layout {
    display: grid;
    gap: 28px;
    align-items: start;
}

/* ==========================================================================
   Registration Form Card
   ========================================================================== */

.registration-card,
.instructions-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.registration-card {
    padding: 32px;
}

.registration-card__header {
    margin-bottom: 28px;
}

.registration-card__title,
.instructions-card__title {
    font-size: clamp(1.45rem, 4vw, 2rem);
}

.registration-card__text {
    margin-top: 10px;
    color: var(--color-muted);
}

.registration-form {
    display: grid;
    gap: 20px;
}

.registration-form__group {
    display: grid;
    gap: 8px;
}

.registration-form__label {
    color: var(--color-text);
    font-weight: 800;
}

.registration-form__control {
    width: 100%;
    min-height: 48px;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #ffffff;
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.registration-form__control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.14);
    outline: none;
}

.registration-form__control--invalid {
    border-color: #dc2626;
}

.registration-form__hint {
    color: var(--color-muted);
    font-size: 0.92rem;
}

.registration-form__error {
    min-height: 22px;
    color: #dc2626;
    font-weight: 700;
}

.registration-form__actions {
    margin-top: 4px;
}

.registration-form__button {
    width: 100%;
    min-height: 50px;
}

/* ==========================================================================
   Dynamic Subject Options
   ========================================================================== */

.subject-options {
    display: grid;
    gap: 12px;
}

.subject-options__placeholder {
    padding: 14px;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-muted);
    background: var(--color-background);
}

.subject-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #ffffff;
    color: var(--color-text);
    font-weight: 700;
}

.subject-option input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

/* ==========================================================================
   Declaration and Instructions
   ========================================================================== */

.declaration-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-background);
    color: var(--color-text);
    font-weight: 700;
}

.declaration-check input {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    flex: 0 0 auto;
    accent-color: var(--color-primary);
}

.instructions-card {
    padding: 28px;
}

.instructions-card__list {
    margin: 20px 0 0;
    padding: 0;
    display: grid;
    gap: 14px;
    list-style: none;
}

.instructions-card__list li {
    position: relative;
    padding-left: 28px;
    color: var(--color-muted);
}

.instructions-card__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.62em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-secondary);
}

/* ==========================================================================
   Responsive Registration Layouts
   ========================================================================== */

@media (min-width: 760px) {
    .registration-form {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .registration-form__group--full {
        grid-column: 1 / -1;
    }

    .subject-options {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1080px) {
    .registration-layout {
        grid-template-columns: minmax(0, 1fr) 360px;
    }

    .instructions-card {
        position: sticky;
        top: calc(var(--header-height) + 24px);
    }
}

@media (max-width: 640px) {
    .registration-hero {
        padding: 58px 0 42px;
    }

    .registration-hero__container {
        text-align: left;
    }

    .registration-hero__text {
        margin-left: 0;
    }

    .registration-section {
        padding: 44px 0 64px;
    }

    .registration-card,
    .instructions-card {
        padding: 24px;
    }
}