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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f0f2f5;
    color: #333;
}

nav {
    background: #1a73e8;
    padding: 0.8rem 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    transition: background 0.2s;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.15);
}

nav .logout {
    margin-left: auto;
    opacity: 0.8;
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1 {
    margin-bottom: 1.5rem;
    color: #1a73e8;
}

h2 {
    margin: 2rem 0 1rem;
    color: #444;
}

/* Login */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
}

.login-container h1 {
    font-size: 1.6rem;
    margin-bottom: 0.3rem;
}

.login-container h2 {
    font-size: 1rem;
    color: #666;
    margin-bottom: 2rem;
    font-weight: normal;
}

.login-container form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 300px;
}

.error {
    background: #fce4ec;
    color: #c62828;
    padding: 0.6rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Forms */
.add-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.add-form input,
.add-form select {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
}

.add-form select[name="start_number"] {
    width: 90px;
}

.add-form input[name="name"] {
    flex: 2;
    min-width: 200px;
}

.add-form select[name="gender"] {
    width: 70px;
}

.add-form input[name="department"] {
    flex: 1;
    min-width: 150px;
}

input, select {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
}

button {
    padding: 0.5rem 1.2rem;
    background: #1a73e8;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s;
}

button:hover {
    background: #1557b0;
}

.btn-delete {
    background: #e53935;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
}

.btn-delete:hover {
    background: #c62828;
}

.btn-export {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background: #2e7d32;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    margin-bottom: 1rem;
    transition: background 0.2s;
}

.btn-export:hover {
    background: #1b5e20;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

th, td {
    padding: 0.6rem 0.8rem;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background: #f5f5f5;
    font-weight: 600;
    font-size: 0.85rem;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

tr:hover {
    background: #f8f9fa;
}

.empty {
    color: #999;
    font-style: italic;
    padding: 2rem;
}

.finish-input {
    width: 100px;
    text-align: center;
}

.dns-checkbox {
    transform: scale(1.2);
    cursor: pointer;
}