body {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.login-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 25px;
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
    position: relative;
    overflow: hidden;
    animation: cardAppear 0.6s ease-out;
}

@keyframes cardAppear {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    transition: left 0.8s ease;
}

.login-card:hover::before { left: 100%; }

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-logo {
    width: 80px; height: 80px; border-radius: 20px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    box-shadow: 0 8px 30px rgba(102,126,234,0.4);
    animation: logoGlow 2s ease-in-out infinite alternate;
}

@keyframes logoGlow {
    from { box-shadow: 0 8px 30px rgba(102,126,234,0.4); }
    to { box-shadow: 0 8px 40px rgba(102,126,234,0.6), 0 0 20px rgba(102,126,234,0.3); }
}

.login-logo i { font-size: 2.5rem; color: white; }

.login-title {
    font-size: 2.25rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.login-subtitle { color: var(--text-secondary); font-size: 1rem; }

.form-group { margin-bottom: 1.5rem; }

.form-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-control {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 14px 16px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    background: rgba(255,255,255,0.1);
    border-color: var(--primary-glow);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
    color: var(--text-primary);
}

.form-control::placeholder { color: rgba(255,255,255,0.3); }

.btn-login {
    background: var(--gradient-primary);
    border: none; border-radius: 12px;
    padding: 16px;
    font-weight: 600; font-size: 1.1rem;
    color: white; width: 100%;
    position: relative; overflow: hidden;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-login:hover::before { left: 100%; }

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102,126,234,0.4);
}

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

.alert-error {
    background: rgba(245,87,108,0.1);
    border: 1px solid rgba(245,87,108,0.3);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    color: #ff6b81;
    font-size: 0.9rem;
    animation: slideInDown 0.3s ease;
}

@keyframes slideInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.login-footer a {
    color: var(--primary-glow);
    text-decoration: none;
    transition: color 0.3s ease;
}

.login-footer a:hover {
    color: var(--accent-glow);
    text-decoration: underline;
}

@media (max-width: 576px) {
    .login-card { padding: 2rem; margin: 1rem; }
    .login-logo { width: 70px; height: 70px; }
    .login-logo i { font-size: 2rem; }
    .login-title { font-size: 1.75rem; }
}

.input-group-text {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--card-border);
    border-right: none;
    color: var(--text-secondary);
}

.input-group .form-control { border-left: none; }
.input-group .form-control:focus { border-left: none; }

.form-check-input {
    background-color: rgba(255,255,255,0.1);
    border-color: var(--card-border);
}

.form-check-input:checked {
    background-color: var(--primary-glow);
    border-color: var(--primary-glow);
}

.form-check-label {
    color: var(--text-secondary);
    cursor: pointer;
}