:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f7f7f7;
    --font-color: #333;
    --white-color: #fff;
    --success-color: #7ed321;
    --danger-color: #d0021b;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --font-family: 'Noto Sans KR', sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--font-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    background: var(--white-color);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--shadow-color);
}

/* --- Login Page Styles --- */
#login-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#login-form input {
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

#login-form button {
    padding: 15px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
}


/* --- Admin Page Styles --- */
#admin-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

#admin-form input {
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

#admin-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

#admin-form button {
    padding: 15px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    transition: background-color 0.3s;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

#admin-form button:hover {
    background-color: #357ABD;
}

#registered-list ul {
    list-style: none;
    padding: 0;
}

#registered-list li {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    border-left: 5px solid var(--secondary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

#registered-list li > span {
    flex-grow: 1;
}

.edit-container {
    display: flex;
    flex-grow: 1;
    gap: 5px;
}

.edit-container input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.actions button,
.edit-container button {
    padding: 8px 12px;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    white-space: nowrap;
}

.edit-btn { background-color: var(--primary-color); }
.delete-btn { background-color: var(--danger-color); }
.save-btn { background-color: var(--success-color); }

.nav-link {
    display: inline-block;
    margin-top: 30px;
    font-size: 1.1em;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #357ABD;
}