/* ========== ОБЩИЕ СТИЛИ ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #FFFFFF;
    color: #111111;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* ========== ШАПКА ========== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid #feef00;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: #111111;
    letter-spacing: -0.5px;
}

.user-info {
    font-size: 12px;
    font-weight: 500;
    background: #F5F5F5;
    padding: 4px 12px;
    color: #111111;
    border: 1px solid #E0E0E0;
}

/* ========== СТРАНИЦА ВХОДА ========== */
.auth-page {
    max-width: 400px;
    margin: 40px auto;
}

.auth-tabs {
    display: flex;
    border-bottom: 2px solid #E0E0E0;
    margin-bottom: 24px;
}

.auth-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    cursor: pointer;
    font-weight: 600;
    color: #888;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.auth-tab.active {
    color: #111111;
    border-bottom-color: #feef00;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #E0E0E0;
    font-size: 14px;
    font-family: inherit;
}

.auth-form button {
    width: 100%;
    padding: 12px;
    background: #feef00;
    border: 1px solid #111111;
    font-weight: 700;
    cursor: pointer;
    font-size: 16px;
}

.auth-form button:hover {
    background: #e5d700;
}

.auth-error {
    color: #d32f2f;
    font-size: 13px;
    margin-bottom: 12px;
}

/* ========== КУРСЫ ========== */
.course-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.course-card {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.course-card:hover {
    background: #FEF9C3;
    border-color: #feef00;
}

.course-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
    color: #111111;
}

.course-description {
    font-size: 14px;
    color: #666666;
    margin-bottom: 12px;
    line-height: 1.4;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #F0F0F0;
    padding-top: 12px;
}

.price {
    font-size: 16px;
    font-weight: 700;
    color: #111111;
}

.badge {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border: 1px solid #E0E0E0;
    background: #FFFFFF;
}

.badge-open {
    background: #feef00;
    border-color: #feef00;
}

.badge-closed {
    background: #F5F5F5;
    border-color: #E0E0E0;
}

/* ========== УРОКИ ========== */
.lessons-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
}

.lesson-card {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    padding: 14px 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 14px;
}

.lesson-card:hover {
    background: #FEF9C3;
    border-color: #feef00;
}

.lesson-number {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    background: #feef00;
    color: #111111;
    font-weight: 700;
    font-size: 16px;
}

.lesson-content {
    flex: 1;
}

.lesson-title {
    font-size: 15px;
    font-weight: 600;
    color: #111111;
}

.lesson-desc {
    font-size: 12px;
    color: #888888;
    margin-top: 2px;
}

/* ========== ВИДЕО ========== */
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin-bottom: 20px;
    overflow: hidden;
    background: #000;
    border: 1px solid #E0E0E0;
}

.video-container video,
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.lesson-detail-title {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 12px;
    color: #111111;
}

.lesson-detail-description {
    color: #666666;
    line-height: 1.5;
    margin-bottom: 16px;
}

/* ========== КНОПКИ ========== */
.back-btn {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    color: #111111;
    margin-bottom: 20px;
    padding: 10px 20px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    background: #feef00;
    border-color: #feef00;
}

.contact-link {
    display: inline-block;
    background: #feef00;
    border: 1px solid #111111;
    color: #111111;
    padding: 14px 28px;
    text-decoration: none;
    font-weight: 700;
    margin-top: 20px;
    transition: all 0.2s ease;
}

.contact-link:hover {
    background: #e5d700;
}

.logout-btn {
    font-size: 11px;
    color: #888;
    cursor: pointer;
    margin-top: 4px;
    text-align: right;
}

.logout-btn:hover {
    color: #d32f2f;
    text-decoration: underline;
}

/* ========== КОММЕНТАРИИ ========== */
.comments-section {
    margin-top: 24px;
    border-top: 2px solid #feef00;
    padding-top: 16px;
}

.comments-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

.comment-item {
    background: #F9F9F9;
    border: 1px solid #E0E0E0;
    padding: 12px;
    margin-bottom: 8px;
}

.comment-reply {
    margin-left: 36px;
    margin-top: 8px;
    padding-left: 12px;
    border-left: 2px solid #feef00;
}

.comment-author {
    font-weight: 700;
    font-size: 13px;
    color: #111111;
}

.comment-text {
    font-size: 14px;
    color: #333333;
    word-break: break-word;
}

.comment-date {
    font-size: 10px;
    color: #AAAAAA;
    margin-top: 4px;
}

.reply-btn {
    font-size: 11px;
    color: #feef00;
    cursor: pointer;
    margin-top: 6px;
    display: inline-block;
    font-weight: 600;
}

.reply-btn:hover {
    text-decoration: underline;
}

.reply-form {
    margin-top: 8px;
    display: none;
    gap: 8px;
}

.reply-input {
    flex: 1;
    padding: 8px;
    border: 1px solid #E0E0E0;
    font-family: inherit;
    font-size: 13px;
}

.reply-submit {
    background: #feef00;
    border: 1px solid #E0E0E0;
    padding: 8px 14px;
    cursor: pointer;
    font-weight: 600;
}

.comment-form {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.comment-input {
    flex: 1;
    padding: 10px;
    border: 1px solid #E0E0E0;
    font-family: inherit;
    font-size: 14px;
    resize: vertical;
}

.comment-submit {
    background: #feef00;
    border: 1px solid #E0E0E0;
    padding: 10px 16px;
    cursor: pointer;
    font-weight: 600;
}

.comment-submit:hover {
    background: #e5d700;
}

.loading-comments {
    text-align: center;
    padding: 20px;
    color: #AAAAAA;
}

/* ========== СТРАНИЦА ОПЛАТЫ ========== */
.payment-page {
    text-align: center;
    padding: 20px 20px 40px;
    border: 1px solid #E0E0E0;
    background: #FFFFFF;
}

.payment-page h1 {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 16px;
    color: #111111;
}

.payment-page p {
    font-size: 16px;
    color: #666666;
    margin-bottom: 24px;
}

/* ========== ЗАГРУЗКА ========== */
.loading {
    text-align: center;
    padding: 40px;
    color: #AAAAAA;
    font-weight: 500;
    border: 1px solid #E0E0E0;
    background: #FFFFFF;
}