/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 450px;
    animation: fadeInUp 0.6s ease;
}

/* Login Card */
.login-card {
    background: white;
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.4);
}

/* Logo Section */
.logo-section {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo {
    height: 80px;
    width: auto;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.login-logo:hover {
    transform: scale(1.05);
}

.logo-section h1 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 700;
}

.logo-section p {
    font-size: 16px;
    color: #666;
    font-weight: 400;
}

/* Login Form */
.login-form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 15px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus {
    outline: none;
    border-color: #0066cc;
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

/* Error Message */
.error-message {
    display: none;
    background: #f8d7da;
    color: #721c24;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid #f5c6cb;
    animation: shake 0.5s ease;
}

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

/* Login Button */
.login-button {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 102, 204, 0.3);
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 102, 204, 0.4);
}

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

.login-button:disabled {
    background: #cccccc;
    cursor: not-allowed;
    box-shadow: none;
}

/* Back Link */
.back-link {
    text-align: center;
    margin-top: 25px;
}

.back-link a {
    color: #0066cc;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.back-link a:hover {
    color: #0052a3;
    text-decoration: underline;
}

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

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-card {
        padding: 40px 30px;
    }

    .logo-section h1 {
        font-size: 24px;
    }

    .logo-section p {
        font-size: 14px;
    }

    .login-logo {
        height: 60px;
    }

    .form-group input {
        padding: 13px 15px;
        font-size: 15px;
    }

    .login-button {
        padding: 14px;
        font-size: 16px;
    }
}