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

:root {
    --primary-color: #1976D2;
    --secondary-color: #64B5F6;
    --dark-color: #1A1A1A;
    --light-bg: #F5F5F5;
    --white: #FFFFFF;
    --text-gray: #666666;
    --border-color: #E0E0E0;
    --success-color: #4CAF50;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-color);
    line-height: 1.6;
}

/* Login Page Styles */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1976D2 0%, #64B5F6 100%);
}

.login-box {
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.logo {
    text-align: center;
    margin-bottom: 2rem;
}

.logo h1 {
    margin-top: 1rem;
    color: var(--dark-color);
    font-size: 1.75rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-gray);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

.login-btn:hover {
    background: #1565C0;
    transform: translateY(-1px);
}

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

.login-links {
    text-align: center;
    margin-top: 1.5rem;
}

.login-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
}

.login-links a:hover {
    text-decoration: underline;
}

.login-links span {
    margin: 0 0.5rem;
    color: var(--text-gray);
}

/* Message Styles */
.message {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    text-align: center;
    font-size: 0.875rem;
}

.message.success {
    background: #e8f5e8;
    color: #2e7d32;
    border: 1px solid #4caf50;
}

.message.error {
    background: #ffebee;
    color: #c62828;
    border: 1px solid #f44336;
}