/* Login Screen */
.login-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 50%, #dfe6ed 100%);
    padding: var(--space-lg);
}

.login-card {
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    padding: 40px 36px 32px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 4px 20px rgba(0,0,0,0.06);
    text-align: center;
    animation: loginSlideUp 0.5s ease;
}

@keyframes loginSlideUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes loginShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-6px); }
    80% { transform: translateX(4px); }
}

.login-card.shake {
    animation: loginShake 0.5s ease;
}

.login-logo-wrap {
    margin-bottom: 16px;
}

.login-logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.login-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 0 28px;
}

.login-field {
    margin-bottom: 16px;
    text-align: right;
}

.login-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.login-input {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.login-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.login-password-wrap {
    position: relative;
}

.login-password-wrap .login-input {
    padding-left: 42px;
}

.login-toggle-pw {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

.login-toggle-pw:hover {
    color: var(--text-primary);
}

.login-error {
    background: #fff5f5;
    color: #c53030;
    border: 1px solid #feb2b2;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 16px;
    text-align: right;
}

.login-btn {
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.login-btn-primary {
    background: var(--accent);
    color: #fff;
}

.login-btn-primary:hover:not(:disabled) {
    filter: brightness(1.08);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.login-btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.login-btn-guest {
    background: var(--bg-base);
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
}

.login-btn-guest:hover {
    background: var(--bg-hover);
    border-color: var(--border-dark, var(--border));
}

.login-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-light);
}

.login-loader {
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: loginSpin 0.7s linear infinite;
}

@keyframes loginSpin {
    to { transform: rotate(360deg); }
}

.login-version {
    margin-top: 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.6;
}

@media (max-width: 768px) {
    .login-card {
        padding: 32px 24px 24px;
        max-width: 360px;
    }
    .login-logo {
        width: 64px;
        height: 64px;
    }
    .login-title {
        font-size: 1.3rem;
    }
}