/* Shared responsive treatment for the login and registration flows. */
.auth-page {
    min-width: 0;
    overflow-x: hidden;
}

.auth-main {
    position: relative;
    isolation: isolate;
}

.auth-card {
    position: relative;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 1.25rem;
    right: 1.25rem;
    height: 2px;
    background: linear-gradient(90deg, transparent, #8B5CF6, #3B82F6, transparent);
    opacity: 0.9;
}

.auth-form input:not([type='checkbox']) {
    min-height: 48px;
    font-size: 1rem;
}

.auth-form input::placeholder {
    color: #A1A1AA;
    opacity: 0.85;
}

.auth-form input:focus-visible,
.auth-form button:focus-visible,
.auth-card a:focus-visible {
    outline: 2px solid #A78BFA;
    outline-offset: 2px;
}

.auth-form button[type='submit'],
.auth-form #google-login,
.auth-form #google-register {
    min-height: 50px;
}

.auth-form input,
.auth-form button,
.auth-card a {
    -webkit-tap-highlight-color: transparent;
}

.captcha-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 7rem 44px;
    gap: 0.5rem;
    align-items: stretch;
}

.captcha-row > * {
    min-width: 0;
}

.auth-toast-container {
    max-width: min(24rem, calc(100vw - 2rem));
}

@media (max-width: 640px) {
    .auth-page {
        min-height: 100dvh;
    }

    .auth-main {
        display: block !important;
        padding-top: 1rem !important;
        padding-bottom: max(2rem, env(safe-area-inset-bottom)) !important;
        background-image:
            radial-gradient(circle at 15% 0%, rgba(139, 92, 246, 0.16), transparent 42%),
            radial-gradient(circle at 100% 35%, rgba(59, 130, 246, 0.10), transparent 38%) !important;
    }

    .auth-layout {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
        gap: 0 !important;
    }

    .auth-card {
        padding: 1.25rem !important;
        border-radius: 1rem !important;
        background: rgba(18, 18, 18, 0.96) !important;
        box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28) !important;
        backdrop-filter: none !important;
    }

    .auth-card > div:first-child {
        margin-bottom: 1.25rem !important;
        gap: 0.375rem !important;
    }

    .auth-card > div:first-child > div:first-child {
        letter-spacing: 0.12em !important;
        font-size: 0.6875rem !important;
    }

    .auth-card h1 {
        font-size: clamp(1.65rem, 8vw, 2rem) !important;
        line-height: 1.12 !important;
        letter-spacing: -0.03em !important;
        text-wrap: balance;
    }

    .auth-card h1 + p {
        margin-top: 0.375rem !important;
        font-size: 0.9375rem;
        line-height: 1.55;
        text-wrap: pretty;
    }

    .auth-form {
        scroll-margin-top: 5rem;
    }

    .auth-form label {
        color: #D4D4D8;
    }

    .auth-form input:not([type='checkbox']) {
        min-height: 50px;
        border-radius: 0.75rem !important;
        padding-left: 0.875rem !important;
        padding-right: 0.875rem !important;
    }

    .auth-form input[type='password'] {
        padding-right: 3rem !important;
    }

    .auth-form input[type='checkbox'] {
        width: 1.125rem;
        height: 1.125rem;
        flex: 0 0 auto;
    }

    .auth-form [id^='toggle-'] {
        min-width: 48px;
        min-height: 48px;
        justify-content: center;
        padding: 0 !important;
    }

    .auth-form button[type='submit'],
    .auth-form #google-login,
    .auth-form #google-register {
        min-height: 52px;
        border-radius: 0.75rem !important;
        font-size: 1rem;
    }

    .captcha-row {
        grid-template-columns: minmax(0, 1fr) 5.5rem 44px;
    }

    .captcha-row #captcha-answer {
        width: 100% !important;
        padding-inline: 0.625rem !important;
        text-align: center;
    }

    .auth-footer > div {
        padding: 1.25rem 1rem calc(1.25rem + env(safe-area-inset-bottom)) !important;
    }

    .auth-toast-container {
        top: max(0.75rem, env(safe-area-inset-top)) !important;
        left: 0.75rem !important;
        right: 0.75rem !important;
        width: auto !important;
        max-width: none !important;
    }

    #referral-banner {
        top: 4.5rem !important;
        width: calc(100% - 1.5rem) !important;
    }

    #intro-overlay {
        display: none !important;
    }
}

@media (max-width: 359px) {
    .auth-layout {
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
    }

    .auth-card {
        padding: 1rem !important;
        border-radius: 0.875rem !important;
    }

    .captcha-row {
        grid-template-columns: minmax(0, 1fr) 4.75rem 42px;
        gap: 0.375rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    #intro-overlay,
    .intro-text,
    .intro-subtext,
    .intro-progress-fill {
        animation: none !important;
        transition: none !important;
    }
}