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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.auth-container {
    background: rgba(44, 62, 80, 0.9);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 450px;
    backdrop-filter: blur(10px);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo img {
    max-width: 200px;
    height: auto;
}

.logo h1 {
    font-size: 24px;
    margin-top: 15px;
    color: #fff;
    font-weight: bold;
}

h2 {
    text-align: center;
    color: #fff;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #b8c5d0;
    font-size: 14px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(52, 73, 94, 0.6);
    border: 1px solid rgba(149, 165, 166, 0.3);
    border-radius: 6px;
    color: #fff;
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-group input::placeholder {
    color: rgba(189, 195, 199, 0.5);
}

.form-group input:focus {
    outline: none;
    border-color: #e74c3c;
    background: rgba(52, 73, 94, 0.8);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.password-wrapper {
    position: relative;
}

.password-wrapper input {
    padding-right: 45px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #95a5a6;
    cursor: pointer;
    font-size: 18px;
    padding: 5px;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: #ecf0f1;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-submit:hover {
    background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
}

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

.form-footer {
    text-align: center;
    margin-top: 25px;
    color: #b8c5d0;
    font-size: 14px;
}

.form-footer a {
    color: #e74c3c;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.form-footer a:hover {
    color: #c0392b;
    text-decoration: underline;
}

.error-message {
    background: rgba(231, 76, 60, 0.2);
    border: 1px solid #e74c3c;
    color: #fff;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
    animation: slideIn 0.3s ease;
}

.error-message.show {
    display: block;
}

.success-message {
    background: rgba(46, 204, 113, 0.2);
    border: 1px solid #2ecc71;
    color: #fff;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
    animation: slideIn 0.3s ease;
}

.success-message.show {
    display: block;
}

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

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.btn-submit.loading::after {
    content: "";
    display: inline-block;
    width: 14px;
    height: 14px;
    margin-left: 10px;
    border: 2px solid #fff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.6s linear infinite;
}

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

/* Responsive */
@media (max-width: 480px) {
    .auth-container {
        padding: 30px 20px;
        margin: 20px;
    }
    
    h2 {
        font-size: 24px;
    }
}