:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --background: #f7fafc;
    --surface: #ffffff;
    --text: #2d3748;
    --text-secondary: #718096;
    --error: #e53e3e;
    --success: #38a169;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--background) 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: var(--surface);
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.logo {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px auto;
}

.logo .material-icons {
    color: white;
    font-size: 32px;
}

h1 {
    color: var(--text);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

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

label {
    display: block;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.input-container {
    position: relative;
}

input[type="password"] {
    width: 100%;
    padding: 16px 20px 16px 50px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafafa;
}

input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 20px;
}

.login-button {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

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

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert.error {
    background: #fed7d7;
    color: var(--error);
    border: 1px solid #feb2b2;
}

.alert.success {
    background: #c6f6d5;
    color: var(--success);
    border: 1px solid #9ae6b4;
}

.alert.info {
    background: #bee3f8;
    color: #2b6cb0;
    border: 1px solid #90cdf4;
}

.footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
    color: var(--text-secondary);
    font-size: 12px;
}

.alert-icon {
    font-size: 16px;
}

@media (max-width: 480px) {
    .login-container {
        padding: 32px 24px;
    }

    h1 {
        font-size: 20px;
    }
}