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

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

.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    max-width: 900px;
    width: 100%;
    display: flex;
    flex-direction: column;
}

.dog-image-container {
    width: 100%;
    background: #f8f9fa;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    border-bottom: 3px solid #667eea;
}

.dog-image {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.login-box {
    padding: 40px;
    width: 100%;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-size: 2em;
    font-weight: 600;
}

.error-message {
    background: #fee;
    border: 1px solid #fcc;
    color: #c33;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 0.95em;
}

.login-form {
    max-width: 400px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 24px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
    font-size: 0.95em;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: all 0.3s ease;
    background: white;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 10px;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

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

/* Mobile responsive */
@media (min-width: 768px) {
    .login-container {
        flex-direction: row;
    }

    .dog-image-container {
        width: 50%;
        padding: 60px 40px;
        border-bottom: none;
        border-right: 3px solid #667eea;
    }

    .dog-image {
        max-width: 100%;
    }

    .login-box {
        width: 50%;
        padding: 60px 50px;
    }
}

@media (max-width: 767px) {
    .login-box {
        padding: 30px 20px;
    }

    h1 {
        font-size: 1.5em;
    }

    .dog-image {
        max-width: 200px;
    }
}