@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow: hidden;
    height: 100%;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 1rem;
    position: relative;
    overflow: hidden;
    width: 100%;
}

body::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: moveBackground 20s linear infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes moveBackground {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* Login Card Styles */
.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 2.5rem;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 
                0 0 0 1px rgba(255, 255, 255, 0.2) inset;
    width: 100%;
    max-width: 480px;
    animation: fadeInUp 0.6s ease-out;
    position: relative;
    z-index: 1;
    margin: auto 0;
}

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

.login-card-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-logo {
    width: 70px;
    height: 70px;
    object-fit: contain;
    margin-bottom: 0.75rem;
    animation: pulse 2s infinite;
    filter: drop-shadow(0 4px 12px rgba(102, 126, 234, 0.3));
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.login-card-header h2 {
    margin: 0.35rem 0;
    color: #333;
    font-size: 1.5rem;
    font-weight: 600;
}

.login-card-header p {
    color: #666;
    font-size: 0.85rem;
    margin: 0;
}

/* Form Styles */
.login-card-body form {
    width: 100%;
}

.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.form-group label i {
    margin-right: 0.5rem;
    color: #667eea;
    font-size: 1.05rem;
}

.form-group input {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid #e8e8e8;
    border-radius: 12px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
    background: #fafafa;
}

.form-group input:hover {
    border-color: #d0d0d0;
    background: #ffffff;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    background: #ffffff;
    transform: translateY(-1px);
}

.form-group input::placeholder {
    color: #aaa;
}

/* Password Toggle */
.password-wrapper {
    position: relative;
}

.password-wrapper input {
    padding-right: 3rem;
}

.toggle-password {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #999;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: #667eea;
}

/* Button Styles */
.btn-login {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 200% 200%;
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.25rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
    background-position: 100% 0;
}

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

.btn-login:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* Alert Styles */
.alert {
    padding: 0.85rem 1rem;
    border-radius: 12px;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: shake 0.5s ease;
    font-size: 0.9rem;
}

.alert-error {
    background: linear-gradient(135deg, #fee 0%, #fdd 100%);
    color: #c33;
    border: 2px solid #fcc;
    box-shadow: 0 4px 12px rgba(204, 51, 51, 0.15);
}

.alert i {
    font-size: 1.1rem;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Success Alert */
.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    border: 2px solid #c3e6cb;
    box-shadow: 0 4px 12px rgba(21, 87, 36, 0.15);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 0.75rem;
    }

    .login-card {
        padding: 1.75rem 2rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }

    .login-card {
        padding: 1.5rem 1.5rem;
        border-radius: 18px;
    }
    
    .login-logo {
        width: 60px;
        height: 60px;
    }
    
    .login-card-header h2 {
        font-size: 1.35rem;
    }

    .login-card-header p {
        font-size: 0.8rem;
    }
    
    .form-group input,
    .btn-login {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }
}

@media (max-width: 360px) {
    .login-card {
        padding: 1.25rem 1rem;
    }
    
    .login-card-header h2 {
        font-size: 1.25rem;
    }

    .login-logo {
        width: 55px;
        height: 55px;
    }
}

@media (max-height: 700px) {
    .login-card {
        padding: 1.5rem 2rem;
    }

    .login-logo {
        width: 60px;
        height: 60px;
    }

    .login-card-header {
        margin-bottom: 1.25rem;
    }

    .login-card-header h2 {
        font-size: 1.35rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }

    .btn-login {
        margin-top: 1rem;
    }
}