.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100dvh;
    background: radial-gradient(circle at center, var(--color-surface-soft) 0%, var(--color-background) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: var(--spacing-4);
    overflow-y: auto;
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-xl);
    animation: fadeInScale 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.login-logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-2);
}

.login-logo span {
    color: var(--color-primary);
}

.login-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.login-form .field {
    margin-bottom: var(--spacing-4);
}

.login-form label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2);
}

.login-form input {
    width: 100%;
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--color-text);
    font-family: inherit;
    transition: all 0.2s ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary-alpha);
}

.login-btn {
    width: 100%;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    font-weight: 600;
    cursor: pointer;
    margin-top: var(--spacing-6);
    transition: all 0.2s ease;
}

.login-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

.login-btn:active {
    transform: translateY(0);
}

.login-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: var(--spacing-3);
    border-radius: var(--r-md);
    font-size: 0.875rem;
    margin-top: var(--spacing-4);
    text-align: center;
    display: none;
}