:root {
    --boarding-bg: #080d14;
    --boarding-bg-radial: #12233a;
    --boarding-card: rgba(16, 24, 38, 0.94);
    --boarding-card-border: rgba(255, 255, 255, 0.12);
    --boarding-text: #f8fafc;
    --boarding-muted: #a8b3c4;
    --boarding-primary: #4da3ff;
    --boarding-primary-hover: #7bbcff;
    --boarding-success: #42d392;
    --boarding-error: #ff6b6b;
    --boarding-input-bg: #0d1420;
    --boarding-input-border: rgba(255, 255, 255, 0.18);
    --boarding-focus: #8cc8ff;
    --boarding-content-width: clamp(44rem, 72vw, 68rem);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

.boarding-body {
    min-height: 100vh;
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--boarding-text);
    background:
        radial-gradient(circle at top, var(--boarding-bg-radial) 0, transparent 34rem),
        linear-gradient(135deg, #05070b 0%, var(--boarding-bg) 45%, #111827 100%);
}

.boarding-shell {
    width: 100%;
    min-height: 100vh;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

.boarding-header {
    width: 100%;
    max-width: 68rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.boarding-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    min-width: 0;
    color: var(--boarding-text);
    text-decoration: none;
}

.boarding-logo {
    display: block;
    width: 3rem;
    height: auto;
    flex: 0 0 auto;
}

.boarding-brand__title {
    color: var(--boarding-text);
    font-size: 1.05rem;
    font-weight: 750;
    line-height: 1.2;
}

.boarding-language-switcher {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--boarding-muted);
    font-size: 0.875rem;
    white-space: nowrap;
}

.boarding-language-switcher__link {
    color: var(--boarding-muted);
    text-decoration: none;
    padding: 0.35rem 0.5rem;
    border-radius: 999px;
}

.boarding-language-switcher__link:hover,
.boarding-language-switcher__link:focus {
    color: var(--boarding-text);
    background: rgba(255, 255, 255, 0.08);
    outline: none;
}

.boarding-language-switcher__link:focus-visible {
    box-shadow: 0 0 0 0.2rem rgba(140, 200, 255, 0.22);
}

.boarding-language-switcher__link.is-active {
    color: var(--boarding-text);
    background: rgba(77, 163, 255, 0.18);
}

.boarding-main {
    width: var(--boarding-content-width);
    max-width: 100%;
    margin: 1.25rem auto 3rem;
}

.boarding-private-notice {
    width: var(--boarding-content-width);
    max-width: 100%;
    margin: 1.5rem auto 0;
    padding: 1rem 1.1rem;
    display: grid;
    gap: 0.35rem;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-left: 0.25rem solid var(--boarding-primary);
    border-radius: 0.5rem;
    color: var(--boarding-muted);
    background: rgba(13, 20, 32, 0.72);
    line-height: 1.5;
}

.boarding-private-notice strong {
    color: var(--boarding-text);
}

.boarding-card {
    width: 100%;
    padding: 2rem;
    border: 1px solid var(--boarding-card-border);
    border-radius: 0.5rem;
    background: var(--boarding-card);
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(18px);
}

.boarding-eyebrow {
    margin: 0 0 0.5rem;
    color: var(--boarding-primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.boarding-card__title {
    margin: 0;
    font-size: 2rem;
    line-height: 1.15;
}

.boarding-card__intro {
    margin: 0.85rem 0 1.5rem;
    color: var(--boarding-muted);
    line-height: 1.6;
}

.boarding-alert {
    margin: 0 0 1.25rem;
    padding: 1rem;
    border-radius: 0.5rem;
    line-height: 1.5;
}

.boarding-alert strong {
    display: block;
    margin-bottom: 0.25rem;
}

.boarding-alert--success {
    color: #d8ffec;
    background: rgba(66, 211, 146, 0.12);
    border: 1px solid rgba(66, 211, 146, 0.35);
}

.boarding-alert--error {
    color: #ffe1e1;
    background: rgba(255, 107, 107, 0.12);
    border: 1px solid rgba(255, 107, 107, 0.35);
}

.boarding-form {
    display: grid;
    gap: 1rem;
}

.boarding-form__group {
    display: grid;
    gap: 0.45rem;
}

.boarding-form__label {
    color: var(--boarding-text);
    font-weight: 650;
}

.boarding-form__input {
    width: 100%;
    min-height: 3rem;
    padding: 0.8rem 0.95rem;
    border: 1px solid var(--boarding-input-border);
    border-radius: 0.5rem;
    color: var(--boarding-text);
    background: var(--boarding-input-bg);
    outline: none;
}

.boarding-form__input:focus {
    border-color: var(--boarding-focus);
    box-shadow: 0 0 0 0.2rem rgba(140, 200, 255, 0.18);
}

.boarding-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    color: var(--boarding-muted);
    line-height: 1.45;
}

.boarding-checkbox input {
    width: 1.1rem;
    height: 1.1rem;
    margin-top: 0.15rem;
    accent-color: var(--boarding-primary);
}

.boarding-button {
    min-height: 3.1rem;
    margin-top: 0.25rem;
    border: 0;
    border-radius: 0.5rem;
    color: #06111f;
    background: linear-gradient(135deg, var(--boarding-primary), var(--boarding-primary-hover));
    font-weight: 800;
    cursor: pointer;
}

.boarding-button:hover,
.boarding-button:focus {
    filter: brightness(1.06);
}

.boarding-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 0.22rem rgba(140, 200, 255, 0.3);
}

.boarding-policy {
    margin-top: 1.5rem;
    color: var(--boarding-muted);
}

.boarding-policy summary {
    cursor: pointer;
    color: var(--boarding-text);
    font-weight: 700;
}

.boarding-policy summary:focus-visible {
    outline: 2px solid var(--boarding-focus);
    outline-offset: 0.25rem;
}

.boarding-policy p {
    margin: 0.85rem 0 0;
}

.boarding-policy__list {
    margin: 0.85rem 0 0;
    padding-left: 1.2rem;
    line-height: 1.55;
}

.boarding-footer {
    max-width: 68rem;
    margin: 0 auto;
    padding: 1rem 0 0.25rem;
    color: var(--boarding-muted);
    font-size: 0.875rem;
    text-align: center;
}

.boarding-footer__meta {
    display: block;
    margin-top: 0.4rem;
    font-size: 0.78rem;
}

@media (max-width: 575px) {
    .boarding-shell {
        padding: 1rem;
    }

    .boarding-header {
        align-items: flex-start;
    }

    .boarding-logo {
        width: 2.4rem;
    }

    .boarding-brand {
        gap: 0.65rem;
    }

    .boarding-brand__title {
        max-width: 11rem;
        font-size: 0.95rem;
    }

    .boarding-main {
        margin: 1rem auto 2rem;
    }

    .boarding-card {
        padding: 1.25rem;
    }

    .boarding-card__title {
        font-size: 1.65rem;
    }
}