/* === Login Screen === */
.login-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: linear-gradient(135deg, #0a0a14 0%, #0f0f1a 40%, #1a1a2e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 80px rgba(233,69,96,0.1);
    text-align: center;
}

.login-logo {
    font-size: 3rem;
    margin-bottom: 8px;
}

.login-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.login-title .accent { color: var(--accent); }

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.login-field {
    margin-bottom: 20px;
    text-align: left;
}

.login-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.login-field input {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border var(--transition);
}

.login-field input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233,69,96,0.15);
}

.login-btn {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--accent);
    color: white;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 8px;
}

.login-btn:hover {
    background: var(--accent-glow);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(233,69,96,0.3);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.login-error {
    color: #ff4757;
    font-size: 0.85rem;
    margin-top: 12px;
    min-height: 20px;
    text-align: center;
}

.login-footer {
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.login-footer span {
    color: var(--border);
}

/* === Logout Button (in header) === */
.logout-btn {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition);
    margin-left: 8px;
}

.logout-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* === Shake animation for wrong password === */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-6px); }
    20%, 40%, 60%, 80% { transform: translateX(6px); }
}

.shake {
    animation: shake 0.5s ease;
}