/* ===== /seminar/ Index (一覧ページ) ===== */

.sem-container { max-width: 1100px; margin: 0 auto; padding: 0 1em; }

/* ----- Hero ----- */
.sem-hero {
    position: relative;
    background: linear-gradient(135deg, #0f2a44 0%, #1f4d7a 60%, #2e7bc6 100%);
    color: #fff;
    padding: 64px 0 56px;
    overflow: hidden;
    text-align: center;
}
.sem-hero-bg {
    position: absolute; inset: 0; pointer-events: none;
    background:
        radial-gradient(circle at 85% 15%, rgba(255,255,255,.08) 0%, transparent 40%),
        radial-gradient(circle at 15% 85%, rgba(255,48,8,.12) 0%, transparent 40%);
}
.sem-hero .container { position: relative; z-index: 1; }
.sem-hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,48,8,.18);
    border: 1px solid rgba(255,121,80,.4);
    color: #ffb39c;
    font-size: .8rem; font-weight: 600;
    padding: 5px 16px; border-radius: 999px;
    margin-bottom: 20px;
    letter-spacing: .05em;
}
.sem-hero-eyebrow-dot {
    font-size: .5rem; color: #ff7950;
    animation: sem-pulse 1.8s ease-in-out infinite;
}
@keyframes sem-pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: .3; }
}
.sem-hero-title {
    font-size: 2.2rem; font-weight: 800; color: #fff;
    line-height: 1.45; margin: 0 0 20px;
    text-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.sem-hero-title-em {
    color: #ffd45c;
}
.sem-hero-lead {
    font-size: 1rem; color: rgba(255,255,255,.9);
    line-height: 1.85; margin: 0 0 26px;
}
.sem-hero-lead strong { color: #fff; }
.sem-hero-chips {
    list-style: none; padding: 0; margin: 0;
    display: flex; justify-content: center; flex-wrap: wrap;
    gap: 10px;
}
.sem-hero-chips li {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2);
    padding: 8px 16px; border-radius: 999px;
    font-size: .85rem; color: #fff; font-weight: 500;
}
.sem-hero-chips i { color: #9fd0ff; font-size: .8rem; }
@media (max-width: 768px) {
    .sem-hero { padding: 48px 0 40px; }
    .sem-hero-title { font-size: 1.5rem; }
    .sem-hero-lead { font-size: .9rem; }
}

/* ----- Value Section ----- */
.sem-value {
    background: #f5f7fa;
    padding: 50px 0 40px;
}
.sem-value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
@media (max-width: 768px) {
    .sem-value-grid { grid-template-columns: 1fr; gap: 14px; }
}
.sem-value-item {
    background: #fff;
    border: 1px solid #e6ecf2; border-radius: 12px;
    padding: 24px 22px; text-align: center;
    transition: transform .2s, box-shadow .2s;
}
.sem-value-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(15,42,68,.08);
}
.sem-value-icon {
    width: 52px; height: 52px; border-radius: 12px;
    background: linear-gradient(135deg, #fff3e0 0%, #ffe4b3 100%);
    color: #ff3008;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 1.3rem; margin-bottom: 14px;
}
.sem-value-title {
    font-size: 1rem; font-weight: 700; color: #0f2a44;
    margin: 0 0 8px;
}
.sem-value-desc {
    font-size: .85rem; color: #5a6b7a; line-height: 1.75;
    margin: 0;
}

/* ----- Main / List ----- */
.sem-main {
    background: #f5f7fa;
    padding: 30px 0 60px;
}
.sem-section-head {
    text-align: center;
    margin-bottom: 32px;
}
.sem-section-title {
    font-size: 1.6rem; font-weight: 800; color: #0f2a44;
    margin: 0 0 10px;
    position: relative; display: inline-block; padding-bottom: 12px;
}
.sem-section-title::after {
    content: ""; position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 60px; height: 3px;
    background: #ff3008; border-radius: 2px;
}
.sem-section-sub {
    font-size: .95rem; color: #5a6b7a; margin: 0;
}
.sem-section-sub strong { color: #ff3008; font-size: 1.1rem; }

/* カテゴリフィルタ */
.sem-filter {
    background: #fff; border: 1px solid #e5e9ef; border-radius: 12px;
    padding: 18px 22px; margin: 0 auto 32px;
    box-shadow: 0 2px 8px rgba(15,42,68,.04);
}
.sem-filter-label {
    font-size: .9rem; font-weight: 700; color: #0f2a44;
    margin-bottom: 12px;
}
.sem-filter-label i { color: #1976d2; margin-right: 6px; }
.sem-filter-chips {
    display: flex; flex-wrap: wrap; gap: 8px;
}
.sem-filter-chip {
    display: inline-flex; align-items: center; gap: 6px;
    background: #f5f7fa; border: 1px solid #dfe4ea;
    border-radius: 999px; padding: 7px 14px;
    font-size: .85rem; color: #4a5566; text-decoration: none;
    transition: all .15s ease;
    cursor: pointer; font-family: inherit; line-height: 1.4;
}
.sem-filter-chip:hover {
    background: #e8f0fa; border-color: #1976d2; color: #1976d2;
    text-decoration: none;
}
.sem-filter-chip.is-active {
    background: #1976d2; border-color: #1976d2; color: #fff;
    font-weight: 600;
}
.sem-filter-chip.is-active:hover { background: #1565c0; color: #fff; }
.sem-filter-chip-count {
    background: rgba(0,0,0,.08); border-radius: 10px;
    padding: 1px 8px; font-size: .72rem; font-weight: 600;
}
.sem-filter-chip.is-active .sem-filter-chip-count {
    background: rgba(255,255,255,.25);
}
.sem-filter-current {
    margin-top: 12px; padding-top: 12px;
    border-top: 1px dashed #e5e9ef;
    display: flex; align-items: center; gap: 8px;
    font-size: .85rem; color: #5a6b7a;
}
.sem-filter-current-name {
    font-weight: 700; color: #0f2a44;
    background: #fff3cd; padding: 2px 10px; border-radius: 4px;
}
.sem-filter-clear {
    margin-left: auto; color: #c82333; text-decoration: none;
    font-size: .82rem;
    background: none; border: none; padding: 0; cursor: pointer;
    font-family: inherit;
}
.sem-filter-clear:hover { color: #a71d2a; text-decoration: underline; }

@media (max-width: 640px) {
    .sem-filter { padding: 14px 16px; }
    .sem-filter-chips { gap: 6px; }
    .sem-filter-chip { padding: 6px 11px; font-size: .8rem; }
    .sem-filter-current { flex-wrap: wrap; }
    .sem-filter-clear { margin-left: 0; }
}

.sem-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 36px;
}
@media (max-width: 992px) { .sem-list { grid-template-columns: repeat(2, 1fr); gap: 16px; } }
@media (max-width: 540px) { .sem-list { grid-template-columns: 1fr; } }

.sem-card {
    background: #fff;
    border: 1px solid #e6ecf2; border-radius: 12px;
    overflow: hidden;
    display: flex; flex-direction: column;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.sem-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(15,42,68,.1);
    border-color: #d2dce5;
}
.sem-card-img {
    position: relative; display: block;
    aspect-ratio: 1/1;
    background: #e8edf3;
    overflow: hidden;
}
.sem-card-img img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}
.sem-card:hover .sem-card-img img { transform: scale(1.04); }
.sem-card-img-placeholder {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #d2e3f5 0%, #b0d0ea 100%);
    color: #2e7bc6; font-size: 3rem;
}
.sem-card-free {
    position: absolute; top: 12px; left: 12px;
    background: #ff3008; color: #fff;
    font-size: .75rem; font-weight: 700;
    padding: 4px 12px; border-radius: 999px;
    letter-spacing: .04em;
    box-shadow: 0 2px 6px rgba(255,48,8,.3);
}
.sem-card-body {
    padding: 16px 18px 18px;
    display: flex; flex-direction: column; flex: 1;
}
.sem-card-company {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 10px;
}
.sem-card-company-logo {
    width: 24px; height: 24px; border-radius: 50%;
    background: #f5f7fa; flex-shrink: 0;
    object-fit: contain; padding: 2px;
    border: 1px solid #e6ecf2;
}
.sem-card-company-logo.placeholder {
    display: inline-flex; align-items: center; justify-content: center;
    color: #9aa0a6; font-size: .7rem;
}
.sem-card-company-name {
    font-size: .76rem; color: #5a6b7a; font-weight: 600;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sem-card-title {
    font-size: 1rem; font-weight: 700; line-height: 1.5;
    margin: 0 0 12px; flex: 1;
}
.sem-card-title a {
    color: #0f2a44; text-decoration: none;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.sem-card-title a:hover { color: #ff3008; }
.sem-card-meta {
    list-style: none; padding: 8px 0 14px;
    margin: 0 0 14px;
    border-top: 1px dashed #e6ecf2;
    display: flex; flex-wrap: wrap; gap: 8px 14px;
}
.sem-card-meta li {
    font-size: .78rem; color: #5a6b7a;
    display: inline-flex; align-items: center; gap: 5px;
}
.sem-card-meta i { color: #9aa0a6; font-size: .72rem; }
.sem-card-btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 6px; width: 100%;
    padding: 10px 16px;
    background: #ff3008; color: #fff;
    font-size: .85rem; font-weight: 700;
    border-radius: 6px; text-decoration: none;
    transition: background .2s, transform .15s;
}
.sem-card-btn:hover {
    background: #d92804; color: #fff; text-decoration: none;
    transform: translateY(-1px);
}

/* ----- Empty ----- */
.sem-empty {
    background: #fff;
    border: 2px dashed #d2dce5; border-radius: 12px;
    padding: 50px 24px; text-align: center;
    margin-bottom: 36px;
}
.sem-empty-icon {
    font-size: 3rem; color: #c4cdd7; margin-bottom: 18px; display: block;
}
.sem-empty-text {
    font-size: 1.1rem; font-weight: 700; color: #0f2a44;
    margin: 0 0 6px;
}
.sem-empty-sub {
    font-size: .9rem; color: #5a6b7a;
    margin: 0 0 22px; line-height: 1.7;
}
.sem-empty-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: #ff3008; color: #fff;
    padding: 12px 28px; border-radius: 6px;
    font-size: .9rem; font-weight: 700; text-decoration: none;
    transition: all .2s;
}
.sem-empty-btn:hover {
    background: #d92804; color: #fff; text-decoration: none;
    transform: translateY(-1px);
}

/* ----- Notice ----- */
.sem-notice {
    background: #f8fafc;
    border: 1px solid #e6ecf2; border-left: 4px solid #5a6b7a;
    border-radius: 6px;
    padding: 14px 20px; margin: 24px 0;
    font-size: .85rem; color: #4a5566; line-height: 1.75;
}
.sem-notice p { margin: 0; }
.sem-notice i { color: #5a6b7a; margin-right: 6px; }
.sem-notice strong { color: #0f2a44; }

/* ----- CTA ----- */
.sem-cta {
    display: grid; grid-template-columns: 1fr auto;
    gap: 24px; align-items: center;
    background: linear-gradient(135deg, #fff8e1 0%, #fff3cd 100%);
    border: 1px solid #f4d97a; border-left: 4px solid #f0ad4e;
    border-radius: 12px;
    padding: 26px 30px; margin-top: 32px;
}
@media (max-width: 768px) {
    .sem-cta { grid-template-columns: 1fr; text-align: center; padding: 22px; }
}
.sem-cta-text { min-width: 0; }
.sem-cta-title {
    font-size: 1.15rem; font-weight: 700; color: #5b3d05;
    margin: 0 0 6px;
}
.sem-cta-sub {
    font-size: .85rem; color: #6b5818;
    line-height: 1.7; margin: 0;
}
.sem-cta-btn {
    display: inline-flex; align-items: center; gap: 8px;
    background: #0f2a44; color: #fff;
    padding: 14px 30px; border-radius: 8px;
    font-size: .95rem; font-weight: 700; text-decoration: none;
    transition: all .2s; white-space: nowrap;
    box-shadow: 0 4px 14px rgba(15,42,68,.25);
}
.sem-cta-btn:hover {
    background: #1f4d7a; color: #fff; text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(15,42,68,.35);
}