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

body {
    font-family: 'Open Sans', Arial, Tahoma, sans-serif;
    background-color: #1a1a1a;
    color: #ffffff;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Top Bar */
.top-bar {
    background-color: #292929;
    padding: 10px 40px;
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 14px;
}

.top-bar a {
    color: #cccccc;
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar a:hover {
    color: #d4a437;
}

.top-bar .icon {
    font-size: 14px;
}

/* Header / Logo Area */
.header {
    background-color: #1a1a1a;
    text-align: center;
    padding: 40px 20px 30px;
    border-bottom: 2px solid #c9302c;
}

.logo-container {
    display: inline-block;
}

.logo-container img {
    width: 280px;
    height: auto;
    display: block;
    margin: 0 auto 10px;
}

.logo-text {
    color: #888888;
    font-size: 22px;
    font-weight: 300;
    line-height: 1.4;
}

/* Navigation */
.nav {
    background-color: #1a1a1a;
    padding: 20px 0;
    text-align: center;
}

.nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.nav ul li a {
    color: #d4a437;
    font-size: 15px;
    font-weight: 400;
    transition: color 0.3s;
}

.nav ul li a:hover {
    color: #ffffff;
}

.nav ul li a.active {
    color: #ffffff;
}

/* Main Content Section */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 50px 40px;
}

.main-content h1 {
    color: #d4a437;
    font-size: 32px;
    font-weight: 300;
    text-align: center;
    margin-bottom: 10px;
}

.main-content h2.subtitle {
    color: #d4a437;
    font-size: 28px;
    font-weight: 300;
    font-style: italic;
    text-align: center;
    margin-bottom: 40px;
}

.main-content .intro {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 15px;
    max-width: 600px;
}

.main-content .intro strong {
    color: #ffffff;
    font-weight: 700;
}

.main-content .goal {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 20px;
    max-width: 600px;
}

.main-content .goal em {
    font-style: italic;
}

.main-content h3 {
    font-size: 30px;
    font-weight: 300;
    color: #ffffff;
    margin-bottom: 25px;
}

.main-content .seminar-info {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 20px;
    max-width: 600px;
}

.main-content .seminar-info strong {
    color: #ffffff;
}

.main-content .research-info {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 30px;
    max-width: 600px;
}

.main-content .research-info a {
    color: #d4a437;
    word-break: break-all;
}

.main-content .research-info a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn-outline {
    display: inline-block;
    padding: 12px 28px;
    border: 2px solid #d4a437;
    color: #d4a437;
    font-size: 14px;
    font-weight: 400;
    transition: all 0.3s;
    background: transparent;
    cursor: pointer;
}

.btn-outline:hover {
    background-color: #d4a437;
    color: #1a1a1a;
}

.btn-filled {
    display: inline-block;
    padding: 12px 28px;
    background-color: #d4a437;
    color: #1a1a1a;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid #d4a437;
    cursor: pointer;
}

.btn-filled:hover {
    background-color: #c49530;
}

/* Yellow Banner */
.yellow-banner {
    background-color: #d4a437;
    padding: 50px 40px;
    text-align: center;
}

.yellow-banner h4 {
    color: #1a1a1a;
    font-size: 22px;
    font-weight: 300;
    line-height: 1.6;
}

/* Next Seminars Section */
.seminars-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 40px;
}

.seminars-section > h2 {
    font-size: 30px;
    font-weight: 300;
    color: #ffffff;
    margin-bottom: 30px;
}

.seminars-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.seminar-card {
    text-align: center;
}

.seminar-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.seminar-card .city-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    margin-bottom: 25px;
    border-radius: 0;
}

.seminar-card h5 {
    font-size: 18px;
    font-weight: 400;
    font-style: italic;
    color: #ffffff;
    margin-bottom: 15px;
}

.seminar-card p {
    font-size: 14px;
    color: #cccccc;
    margin-bottom: 8px;
}

.seminar-card .btn-outline {
    margin-top: 20px;
}

/* Read More Box */
.read-more-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 40px 60px;
}

.read-more-box {
    border: 2px solid #d4a437;
    padding: 50px 40px;
    text-align: center;
}

.read-more-box h2 {
    font-size: 30px;
    font-weight: 300;
    font-style: italic;
    color: #ffffff;
    margin-bottom: 15px;
}

.read-more-box h3 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 5px;
    letter-spacing: 1px;
}

.read-more-box .btn-filled {
    margin-top: 25px;
}

/* Video Section */
.video-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 40px 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.video-placeholder {
    background-color: #333333;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.play-btn {
    width: 60px;
    height: 60px;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.play-btn::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 0 12px 22px;
    border-color: transparent transparent transparent #ffffff;
    margin-left: 4px;
}

/* Register Section */
.register-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 40px 60px;
}

.register-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.register-section .tagline {
    font-size: 15px;
    color: #cccccc;
    margin-top: 15px;
}

/* Footer */
.footer {
    background-color: #292929;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #888888;
}

.back-to-top {
    width: 40px;
    height: 40px;
    background-color: #d4a437;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.back-to-top:hover {
    background-color: #c49530;
}

.back-to-top::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 8px 10px 8px;
    border-color: transparent transparent #1a1a1a transparent;
}

/* ========================================
   Page Content (subpages)
   ======================================== */
.page-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 50px 40px;
}

.page-content .page-title {
    font-size: 30px;
    font-weight: 300;
    color: #ffffff;
    margin-bottom: 20px;
}

.page-content .page-subtitle {
    font-size: 16px;
    color: #d4a437;
    margin-bottom: 20px;
}

.page-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
    margin-top: 30px;
    margin-bottom: 15px;
}

.page-content h4 {
    font-size: 17px;
    font-weight: 600;
    color: #ffffff;
    margin-top: 25px;
    margin-bottom: 10px;
}

.page-content p {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 15px;
    line-height: 1.7;
}

.page-content p strong {
    color: #ffffff;
}

.topic-list {
    list-style: none;
    margin-bottom: 25px;
    padding-left: 0;
}

.topic-list li {
    font-size: 15px;
    color: #d4a437;
    padding: 4px 0;
    line-height: 1.6;
}

.gold-list li {
    color: #d4a437;
}

.gold-link {
    color: #d4a437 !important;
}

.gold-link:hover {
    text-decoration: underline;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin-top: 25px;
    margin-bottom: 10px;
}

.contact-form label {
    display: block;
    font-size: 14px;
    color: #cccccc;
    margin-bottom: 5px;
    margin-top: 15px;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 8px 10px;
    font-size: 14px;
    font-family: 'Open Sans', Arial, sans-serif;
    border: 1px solid #555;
    background: #ffffff;
    color: #333;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .btn-filled {
    margin-top: 20px;
}

/* Warning Box */
.warning-box {
    margin-top: 30px;
    padding: 20px;
    border-left: 4px solid #d4a437;
}

.warning-box p {
    color: #cccccc;
}

/* Doctor Profile */
.doctor-profile {
    margin-bottom: 25px;
}

.doctor-photo {
    width: 194px;
    height: auto;
    display: block;
    margin-bottom: 5px;
}

.doctor-name {
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    background: #292929;
    display: inline-block;
    padding: 5px 15px;
}

/* Dates Grid */
.dates-grid {
    margin-top: 20px;
}

.date-item {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #333;
}

.date-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 5px;
    margin-top: 0;
}

.date-item p {
    font-size: 14px;
    color: #cccccc;
    margin-bottom: 0;
}

.lang-tag {
    color: #d4a437;
    font-size: 12px;
    font-weight: 400;
    text-transform: uppercase;
}

/* ========================================
   Article Section (homepage long content)
   ======================================== */
.article-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 40px;
    border-top: 2px solid #333;
}

.article-section h2 {
    font-size: 28px;
    font-weight: 300;
    color: #d4a437;
    margin-bottom: 25px;
}

.article-section h3 {
    font-size: 20px;
    font-weight: 600;
    color: #d4a437;
    margin-top: 30px;
    margin-bottom: 15px;
}

.article-section p {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 15px;
    line-height: 1.8;
}

.article-section p strong {
    color: #ffffff;
}

.article-section ul {
    list-style: disc;
    padding-left: 25px;
    margin-bottom: 20px;
}

.article-section ul li {
    font-size: 15px;
    color: #cccccc;
    padding: 4px 0;
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 768px) {
    .seminars-grid {
        grid-template-columns: 1fr;
    }

    .video-section {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .top-bar {
        flex-wrap: wrap;
        gap: 10px;
        padding: 10px 20px;
    }

    .nav ul {
        gap: 15px;
        padding: 0 20px;
    }

    .main-content h1 {
        font-size: 24px;
    }

    .main-content h2.subtitle {
        font-size: 20px;
    }
}