*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: system-ui, sans-serif;
    margin: 0;
    padding: 2rem;
    background: #f5f5f5;
    color: #1a1a1a;
}

h1 { margin: 0 0 1.5rem; font-size: 1.5rem; }

/* Tool card grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.tool-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.25rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: box-shadow 0.15s;
}

.tool-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.1); }

.tool-icon { font-size: 2rem; line-height: 1; }
.tool-icon img { width: 2rem; height: 2rem; }

.tool-name { font-weight: 600; font-size: 1rem; }
.tool-desc { font-size: 0.875rem; color: #555; }

/* Login form */
.login-form {
    max-width: 320px;
    margin: 4rem auto;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 2rem;
}

.login-form h1 { text-align: center; margin-bottom: 1.5rem; }

.login-form div { margin-bottom: 1rem; }

.login-form label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.login-form input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

.login-form input:focus {
    outline: none;
    border-color: #4f6ef7;
    box-shadow: 0 0 0 2px rgba(79,110,247,0.2);
}

.error { color: #c0392b; font-size: 0.875rem; margin-bottom: 1rem; }

button[type="submit"] {
    width: 100%;
    padding: 0.6rem;
    background: #4f6ef7;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}

button[type="submit"]:hover { background: #3a56d4; }

.logout-btn {
    background: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: #555;
}

.logout-btn:hover { background: #f0f0f0; }