body {
    min-height: 100vh;
    display: flex;
}

main#signin-page {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

main#signin-page div.signin-card {
    display: flex;
    flex-direction: row;
    width: 100%;
    min-height: 100vh;
}

/* ── Left Panel ── */
main#signin-page div.signin-card div.signin-brand {
    background: var(--color-secondary-background-gradient);
    color: white;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 40px;
    padding: 64px 56px;
    position: relative;
    overflow: hidden;
}

main#signin-page div.signin-card div.signin-brand::before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    bottom: -130px;
    right: -130px;
}

main#signin-page div.signin-card div.signin-brand::after {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    top: -70px;
    left: -70px;
}

main#signin-page div.signin-card div.signin-brand img.brand-logo {
    width: 72px;
    height: auto;
    position: relative;
    z-index: 1;
}

main#signin-page div.signin-card div.signin-brand div.brand-body {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex: 1;
    justify-content: center;
}

main#signin-page div.signin-card div.signin-brand div.brand-body h1.brand-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    line-height: 1.3;
}

main#signin-page div.signin-card div.signin-brand div.brand-body div.brand-divider {
    width: 36px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 3px;
}

main#signin-page div.signin-card div.signin-brand div.brand-body p.brand-subtitle {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    max-width: 380px;
}

main#signin-page div.signin-card div.signin-brand img.brand-illustration {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 460px;
    height: 340px;
    object-fit: contain;
    object-position: bottom center;
    display: block;
    margin: 0 auto;
}

/* ── Right Panel ── */
main#signin-page div.signin-card div.signin-form-panel {
    background: white;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 64px 56px;
    gap: 8px;
}

main#signin-page div.signin-card div.signin-form-panel div.signin-mobile-brand {
    display: none;
}

main#signin-page div.signin-card div.signin-form-panel div.form-header {
    width: 100%;
    max-width: 380px;
    margin-bottom: 8px;
}

main#signin-page div.signin-card div.signin-form-panel div.form-header h2.form-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 8px;
}

main#signin-page div.signin-card div.signin-form-panel div.form-header div.form-title-underline {
    width: 36px;
    height: 3px;
    background: var(--color-secondary);
    border-radius: 3px;
}

main#signin-page div.signin-card div.signin-form-panel div.alert {
    width: 100%;
    max-width: 380px;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 0.875rem;
    line-height: 1.5;
}

main#signin-page div.signin-card div.signin-form-panel div.alert.error {
    background: var(--color-error-100);
    border: 1px solid var(--color-error-300);
    color: var(--color-error-700);
}

main#signin-page div.signin-card div.signin-form-panel div.alert.success {
    background: var(--color-success-100);
    border: 1px solid var(--color-success-300);
    color: var(--color-success-700);
}

main#signin-page div.signin-card div.signin-form-panel form#form-signin {
    width: 100%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

main#signin-page div.signin-card div.signin-form-panel form#form-signin button[type="submit"].btn.primary {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    letter-spacing: 0.04em;
    border: none;
    cursor: pointer;
}

main#signin-page div.signin-card div.signin-form-panel a.forgot-link {
    display: block;
    text-align: center;
    color: var(--color-secondary-600);
    font-size: 0.875rem;
    text-decoration: none;
    width: 100%;
    max-width: 380px;
    transition: color 0.2s;
    margin-top: 20px;
}

main#signin-page div.signin-card div.signin-form-panel a.forgot-link:hover {
    color: var(--color-secondary-800);
    text-decoration: underline;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    main#signin-page div.signin-card div.signin-brand {
        display: none;
    }

    main#signin-page div.signin-card {
        min-height: 100vh;
    }

    main#signin-page div.signin-card div.signin-form-panel {
        padding: 48px 28px;
    }

    main#signin-page div.signin-card div.signin-form-panel div.signin-mobile-brand {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        width: 100%;
        max-width: 380px;
        margin-bottom: 12px;
    }

    main#signin-page div.signin-card div.signin-form-panel div.signin-mobile-brand img.mobile-brand-logo {
        width: 80px;
        height: 80px;
        flex-shrink: 0;
    }

    main#signin-page div.signin-card div.signin-form-panel div.signin-mobile-brand span.mobile-brand-name {
        font-size: 2.4rem;
        font-weight: 700;
        color: var(--color-onBackground);
    }
}