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

.view { width: 100%; height: 100%; }

/* Login View Styles */
#login-view { display: flex; justify-content: center; align-items: center; }

.login-container {
    background: var(--surface);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    width: 100%;
    max-width: 360px;
}

.login-container h1 { margin-top: 0; margin-bottom: 10px; }
.login-container p { margin-bottom: 30px; color: var(--muted); }

.form-group { margin-bottom: 20px; text-align: left; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 600; }
.form-group input {
    width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 6px; box-sizing: border-box;
}

.btn-login {
    width: 100%; padding: 12px; background-color: var(--primary); color: var(--primary-contrast);
    border: none; border-radius: 6px; font-size: 16px; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease;
}
.btn-login:hover { background-color: var(--primary-hover); }

/* Main View Styles */
#main-view { display: none; flex-direction: column; }

.main-header {
    display: flex; justify-content: center; align-items: center; padding: 15px 20px;
    background-color: var(--primary); color: var(--primary-contrast);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--border);
    position: relative;
}

.main-header h1 { margin: 0; font-size: 24px; }

#logout-btn {
    background-color: transparent; color: var(--primary-contrast); border: 1px solid var(--primary-contrast);
    padding: 8px 15px; border-radius: 6px; cursor: pointer; transition: all 0.3s ease; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
}
#logout-btn:hover { background-color: var(--primary-contrast); color: var(--primary); }

.main-nav { display: flex; gap: 10px; }

.nav-btn {
    background: none; border: 1px solid transparent; color: var(--primary-contrast);
    padding: 8px 16px; border-radius: 6px; cursor: pointer; font-size: 14px; font-weight: 500; transition: all 0.3s ease;
}
.nav-btn.active { background-color: var(--primary-contrast); color: var(--primary); font-weight: 700; }
.nav-btn:not(.active):hover { background-color: rgba(255, 255, 255, 0.15); }

.content { padding: 0; flex-grow: 1; background-color: var(--bg); }
#content-frame { width: 100%; height: 100%; border: none; }