:root {
    --primary: #6c5ce7;
    --primary-dark: #5649c9;
    --secondary: #a29bfe;
    --success: #00b894;
    --info: #00cec9;
    --info-dark: #00a6a1;
    --warning: #fdcb6e;
    --warning-text: #e17055;
    --danger: #d63031;
    --light: #f8f9fa;
    --dark: #2d3436;
    --gray: #636e72;
    --border-radius: 16px;
    --card-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #6c5ce7 0%, #00cec9 100%);
    color: var(--dark);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: white;
    border-radius: var(--card-radius);
    padding: 35px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--info));
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.logo {
    text-align: center;
    margin-bottom: 25px;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary), var(--info));
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 28px;
    color: white;
    box-shadow: 0 5px 15px rgba(108, 92, 231, 0.3);
}

.logo h2 {
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 5px;
}

.logo p {
    color: var(--gray);
    font-size: 0.95rem;
}

.card-title {
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark);
}

/* Form Elements */
.form-label {
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--dark);
    display: flex;
    align-items: center;
}

.form-label i {
    margin-right: 8px;
    color: var(--primary);
}

.form-control {
    border-radius: 10px;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus {
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
    border-color: var(--primary);
}

.input-group {
    position: relative;
}

.input-group .form-control {
    padding-left: 40px;
}

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    z-index: 5;
}

/* Buttons */
.btn {
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 10px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(108, 92, 231, 0.4);
}

.btn-block {
    width: 100%;
}

/* Alert */
.alert {
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 20px;
    border: none;
}

.alert-danger {
    background: rgba(214, 48, 49, 0.15);
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 25px;
    color: var(--gray);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 576px) {
    .login-card {
        padding: 25px;
    }
    
    .logo-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-card {
    animation: fadeIn 0.5s ease-out;
}