body {
    background: linear-gradient(135deg, #5B86E5, #36D1DC);
    min-height: 100vh;
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
    border: 1px solid #f5c6cb;
    animation: shake 0.5s ease-in-out;
}

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

.back-to-home {
    position: absolute;
    top: 20px;
    left: 20px;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: 25px;
    backdrop-filter: blur(5px);
}

.back-to-home i {
    font-size: 1.1em;
}

.back-to-home:hover {
    transform: translateX(-5px);
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.form-group {
    position: relative;
}

.form-group i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #6b7179;
}

.form-input {
    padding-left: 35px !important;
}

.login {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 400px;
    margin: 20px;
    animation: slideUp 0.5s ease-out;
}

.login h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 2em;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 500;
}

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

.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1em;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-input:focus {
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
    outline: none;
}

.btn.blue {
    width: 100%;
    background: linear-gradient(135deg, #4299e1, #3182ce);
    color: white;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.btn.blue:hover {
    background: linear-gradient(135deg, #3182ce, #2c5282);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(66, 153, 225, 0.4);
}

.register-link {
    text-align: center;
    margin-top: 15px;
    color: #4a5568;
}

.form-link {
    color: #4299e1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.form-link:hover {
    color: #2c5282;
    text-decoration: underline;
}

@media (max-width: 480px) {
    .login {
        margin: 10px;
        padding: 30px 20px;
    }

    .login h1 {
        font-size: 1.8em;
    }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}