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

:root {
    --bg: #f7f7f5;
    --card: #ffffff;
    --text: #111111;
    --text-muted: #666666;
    --border: #e5e5e5;
    --accent: #111111;
    --accent-hover: #333333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 24px;
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 32px;
}

.logo {
    text-align: center;
    margin-bottom: 24px;
}

.logo-img {
    height: 32px;
    width: auto;
    display: inline-block;
}

.title {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

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

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

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-muted);
}

.input-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 15px;
    background: var(--card);
    color: var(--text);
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.options {
    margin-bottom: 24px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-muted);
}

.login-button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.login-button:hover:not(:disabled) {
    background: var(--accent-hover);
}

.login-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.input-valid {
    border-color: #2e7d32 !important;
}

.input-invalid {
    border-color: #c62828 !important;
}

.dev-signature {
    position: fixed;
    bottom: 16px;
    right: 16px;
    opacity: 0.6;
}

.dev-signature img {
    height: 14px;
}