body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f5f7fb;
    color: #222;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

.site-header {
    background-color: #1f3c88;
    padding: 16px 0;
    margin-bottom: 30px;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo,
.site-header nav a {
    color: white;
    text-decoration: none;
    margin-left: 15px;
    font-weight: bold;
}

.logo {
    margin-left: 0;
    font-size: 22px;
}

h1, h2, h3 {
    color: #1f3c88;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.course-card,
.module-block,
.course-detail {
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.button {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 14px;
    background-color: #1f3c88;
    color: white;
    text-decoration: none;
    border-radius: 6px;
}

.button:hover {
    opacity: 0.9;
}

.modules-section {
    margin-top: 30px;
}

.module-block {
    margin-bottom: 20px;
}

.breadcrumbs {
    margin-bottom: 20px;
    font-size: 14px;
    color: #666;
}

.breadcrumbs a {
    color: #1f3c88;
    text-decoration: none;
}

.lesson-header,
.lesson-content,
.content-block {
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.text-content {
    line-height: 1.7;
    font-size: 16px;
}

.content-block h3 {
    margin-top: 0;
}

video,
audio {
    margin-top: 10px;
}

.form-container {
    max-width: 500px;
    margin: 40px auto;
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.form-container form p {
    margin-bottom: 15px;
}

.form-container input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    box-sizing: border-box;
}

.form-note {
    margin-top: 20px;
}

.user-info {
    color: white;
    margin-left: 15px;
    font-weight: bold;
}

.logout-form {
    display: inline-block;
    margin-left: 15px;
}

.nav-button {
    background: transparent;
    border: 1px solid white;
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}

.nav-button:hover {
    opacity: 0.9;
}

.access-status {
    margin-top: 20px;
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: bold;
}

.access-open {
    background-color: #e6f7e6;
    color: #1d7a1d;
}

.access-closed {
    background-color: #fff0f0;
    color: #b02a2a;
}

.lesson-locked {
    color: #b02a2a;
    font-size: 14px;
    margin-left: 8px;
}

.profile-container {
    margin-top: 20px;
}

.profile-card {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
}

.profile-card h2 {
    margin-top: 0;
}

.messages {
    margin-bottom: 20px;
}

.message-box {
    background-color: #e6f7e6;
    color: #1d7a1d;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 10px;
    font-weight: bold;
}