/* ─────────────────────────────────────────
   PAGE SEMINAR — セミナーのご案内
   Title band kiểu teal strip (cùng pattern rs-title-band),
   card trắng chứa các seminar: heading + thanh セミナー名 xanh lá + bảng.
   ───────────────────────────────────────── */

/* ── Title band (teal strip) ── */
.sem-title-band-wrap {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 2rem;
}
.sem-title-band {
    display: inline-block;
    background: #4DB1AF;
    color: #fff;
    font-size: 26px; font-weight: 700;
    line-height: 1;
    padding: 18px 48px 18px 28px;
    margin: 0;
}

/* ── Wrapper ── */
.sem-wrap {
    max-width: 1200px;
    margin: 24px auto 64px;
    padding: 0 2rem;
}

/* ── ③ Section heading với đường kẻ 2 bên ── */
.sem-section-heading {
    display: flex;
    align-items: center;
    gap: 28px;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 28px;
    line-height: 40px;
    color: #008F8D;
    margin: 32px 0;
}
.sem-section-heading::before,
.sem-section-heading::after {
    content: "";
    flex: 1;
    height: 1px;
    background: #A9D9D9;
}

/* ── White card chứa toàn bộ seminar ── */
.sem-card {
    background: #ffffff;
    border: 1px solid #cccccc;
    border-radius: 8px;
    padding: 40px 32px 50px;
}

/* ── Mỗi seminar ── */
.sem-block { margin-bottom: 56px; }
.sem-block:last-child { margin-bottom: 0; }

.sem-block-title {
    text-align: center;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 20px;
    line-height: 28px;
    color: #061C3D;
    margin: 0 0 12px;
}
.sem-block-sub {
    text-align: center;
    font-size: 14px;
    line-height: 20px;
    color: #061C3D;
    margin: 0 0 16px;
}

/* Thanh セミナー名 (xanh lá) */
.sem-name-bar {
    background: #00C48A;
    color: #ffffff;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 15px;
    line-height: 22px;
    text-align: center;
    border-radius: 4px;
    padding: 10px 16px;
    margin: 0 0 20px;
}

/* ── Bảng seminar ── */
.sem-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 14px;
    line-height: 22px;
    color: #061C3D;
}
.sem-table th,
.sem-table td {
    border: 1px solid #E0E4E8;
    padding: 14px 18px;
    text-align: left;
    vertical-align: middle;
}
.sem-table thead th {
    background: #F3F3F3;
    font-weight: 700;
}
.sem-table .sem-td-content  { width: 38%; }
.sem-table .sem-td-lecturer { width: 41%; }
.sem-table .sem-td-date     { width: 21%; }
.sem-table--simple th:first-child,
.sem-table--simple .sem-td-content { width: 55%; }
.sem-table--simple .sem-td-date    { width: 45%; }

/* ── Nút sau bảng (過去に開催した…) — cùng họ nút teal + arrow ── */
.sem-btn-wrap {
    text-align: center;
    margin-top: 36px;
}
.sem-btn {
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-width: 320px;
    height: 56px;
    padding: 10px 14px 10px 26px;
    border-radius: 8px;
    text-decoration: none;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 17px;
    color: #FFFFFF;
    background-image: url('../../images/btn_background_blue.png');
    background-color: #008F8D;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: opacity 0.3s;
}
.sem-btn:hover { opacity: 0.85; }
.sem-btn span:first-child {
    color: #FFFFFF;
    text-decoration: underline;
    text-underline-offset: 4px;
}
.sem-btn-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    flex: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .sem-title-band-wrap { padding: 0 16px; }
    .sem-title-band { font-size: 20px; padding: 14px 28px 14px 18px; }
    .sem-wrap { padding: 0 16px; }
    .sem-section-heading { font-size: 20px; gap: 14px; }
    .sem-card { padding: 24px 12px 32px; }
    .sem-table th, .sem-table td { padding: 10px 10px; font-size: 13px; }
    .sem-btn { min-width: 0; width: 100%; font-size: 15px; }
}