.seminar-intro {
    color: var(--color-main);
}

.seminar-intro-inner {
    display: block;
}

.seminar-intro-title {
    display: flex;
    align-items: center;
    gap: clamp(0.625rem, -0.809rem + 6.37vw, 2.25rem);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-main);
}

.seminar-intro-icon {
    width: clamp(3rem, 0.353rem + 11.76vw, 6rem);
    height: auto;
    display: block;
    flex-shrink: 0;
}

.seminar-intro-title h2 {
    margin: 0;
    font-size: clamp(1.5rem, 0.342rem + 5.15vw, 2.813rem);
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: 0.04em;
}

.seminar-intro-text p {
    margin-bottom: var(--space-16-32);
    color: #333;
    font-size: inherit;
    line-height: 1.8;
    letter-spacing: 0.04em;
}

.seminar-registration {
    min-width: 0;
    padding: 24px 20px;
    background-color: var(--color-light);
    color: var(--color-main)
}

.seminar-registration-heading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 0;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--color-main);
    font-size: clamp(1.25rem, 1.029rem + 0.98vw, 1.5rem);
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: 0.04em;
}

.seminar-registration-heading i {
    flex-shrink: 0;
    font-size: 1.3em;
    line-height: 1;
}

.seminar-registration-heading span {
    min-width: 0;
}

.seminar-registration-description {
    margin-top: 18px;
}

.seminar-registration-description p {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.9;
    text-align: left;
    overflow-wrap: anywhere;
}

.seminar-registration-description p + p {
    margin-top: 10px;
}

.seminar-design-c .seminar-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
}

.seminar-design-c .seminar-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
}

.seminar-design-c .seminar-session {
    min-width: 0;
    border: 1px solid #dce6ef;
    border-top: 5px solid var(--color-sub);
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 4px 14px rgba(31, 78, 121, 0.1);
    overflow: hidden;
    scroll-margin-top: 120px;
}

.seminar-design-c .seminar-session-inner {
    padding: 20px clamp(1.25rem, 1.029rem + 0.98vw, 1.5rem);
}

.seminar-design-c .seminar-session-meta {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
        "number  time     side"
        "company company  side";
    align-items: center;
    gap: 8px var(--space-8-16);
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid #bdd3e6;
}

.seminar-design-c .seminar-session-number {
    grid-area: number;
    justify-self: start;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 8px 10px;
    border-radius: 4px;
    background: var(--color-main);
    color: #fff;
    line-height: 1.4;
    white-space: nowrap;
}

.seminar-design-c .seminar-session-number span,
.seminar-design-c .seminar-session-number strong {
    font-size: clamp(0.813rem, 0.537rem + 1.23vw, 1.125rem);
    font-weight: 700;
}

.seminar-session-schedule {
    grid-area: time;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 5px;
    min-width: 0;
}
.seminar-design-c .seminar-session-time {
    color: var(--color-main);
    font-size: clamp(0.875rem, 0.654rem + 0.98vw, 1.125rem);
    font-weight: 700;
    line-height: 1.5;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.seminar-design-c .seminar-session-time i {
    flex-shrink: 0;
    font-size: clamp(0.875rem, 0.71rem + 0.74vw, 1.063rem);
}

.seminar-design-c .seminar-session-time span {
    white-space: nowrap;
}

.seminar-design-c .seminar-session-company {
    grid-area: company;
    min-width: 0;
    color: var(--color-main);
    font-size: clamp(1.125rem, 1.015rem + 0.49vw, 1.25rem);
    font-weight: 500;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.seminar-design-c .seminar-session-side {
    grid-area: side;
    justify-self: end;
    align-self: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.seminar-design-c .seminar-session-watermark {
    color: #c7dcee;
    font-family: Arial, sans-serif;
    font-size: clamp(3rem, 1.787rem + 5.39vw, 4.375rem);
    font-style: italic;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.06em;
    pointer-events: none;
    user-select: none;
}

.seminar-design-c .seminar-session-capacity {
    padding: 3px 7px;
    border-radius: 4px;
    background: var(--color-light);
    color: var(--color-main);
    font-size: clamp(0.75rem, 0.585rem + 0.74vw, 0.938rem);
    line-height: 1.5;
    white-space: nowrap;
}

.seminar-design-c .seminar-session-capacity strong {
    font-weight: 700;
}

.seminar-design-c .seminar-session-title {
    color: var(--color-main);
    font-size: clamp(1.25rem, 1.029rem + 0.98vw, 1.5rem);
    font-weight: 700;
    line-height: 1.65;
    text-align: left;
    overflow-wrap: anywhere;
}

.seminar-design-c .seminar-session-title-note {
    font-size: 0.8em;
}

.seminar-design-c .seminar-session-subtitle {
    display: block;
    margin-top: 8px;
    font-size: 0.8em;
    line-height: 1.7;
}

.seminar-design-c .seminar-session-description {
    margin-top: 22px;
    padding: 18px 16px;
    border-radius: var(--radius-md);
    background: #f1f6fa;
}

.seminar-design-c .seminar-session-label {
    margin-bottom: 12px;
    color: var(--color-main);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.5;
}

.seminar-design-c .seminar-catch {
    margin-bottom: 16px;
    color: var(--color-sub);
    font-size: 16px;
    font-weight: 700;
    line-height: 1.8;
    overflow-wrap: anywhere;
}


.seminar-design-c .seminar-session-text {
    color: #202b36;
    font-weight: 400;
    line-height: 1.9;
    overflow-wrap: anywhere;
}

.seminar-design-c .seminar-session-text + .seminar-session-text {
    margin-top: 1em;
}

.seminar-design-c .seminar-session-limited {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border: 1px solid #ebcf9d;
    border-radius: 4px;
    background: #fff6e7;
    color: #925400;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.5;
    white-space: nowrap;
}

.seminar-design-c .seminar-session.is-limited:not(.is-full)
.seminar-session-limited {
    display: inline-flex;
}

.seminar-design-c .seminar-session-closed {
    display: none;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px 12px;
    padding: 12px;
    border-bottom: 1px solid #f0c9ce;
    background: #fff0f0;
    color: #b52032;
    text-align: center;
}

.seminar-design-c .seminar-session.is-full {
    border-top-color: #b52032;
}

.seminar-design-c .seminar-session.is-full .seminar-session-closed {
    display: flex;
}

.seminar-design-c .seminar-session-closed strong {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.5;
    letter-spacing: 0.06em;
}

.seminar-design-c .seminar-session-closed span {
    font-size: 13px;
    line-height: 1.5;
}

.seminar-form .section-inner {
    background-color: var(--color-light);
    border-radius: var(--radius-md);
    padding: 16px;
}

.seminar-form .section-inner h4 {
    text-align: center;
    line-height: 1.5;
    font-size: 20px;
    color: var(--color-main);
    font-weight: 800;
}

.seminar-form p {
    font-size: 10px;
    text-align: center;
}

.seminar-apply {
    padding: 8px 0;
    background: var(--color-light);
}

.seminar-apply-heading {
    margin: 0 0 18px;
    color: var(--color-main);
    font-size: clamp(1.313rem, 0.816rem + 2.21vw, 1.875rem);
    font-weight: 700;
    line-height: 1.5;
    letter-spacing: 0.04em;
    text-align: center;
}

.seminar-apply-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin: clamp(3.5rem, 1.625rem + 8.33vw, 5.625rem) auto 0;
    padding: 58px 18px 28px;
    background: #fff;
    border-radius: 18px;
    color: var(--color-main);
    text-align: center;
    text-decoration: none;
    box-shadow: 0 6px 18px rgba(31, 78, 121, 0.16);
}

.seminar-apply-icon {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    width: clamp(4.625rem, 3.743rem + 3.92vw, 5.625rem);
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #fff;
    color: var(--color-main);
    font-size: clamp(2.125rem, 1.243rem + 3.92vw, 3.125rem);
    box-shadow: 0 4px 12px rgba(31, 78, 121, 0.14);
}

.seminar-apply-icon::before {
    content: "";
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    z-index: -1;
    box-shadow: var(--shadow-card);
}

.seminar-apply-title {
    display: block;
    margin: 0;
    color: var(--color-main);
    font-size: clamp(1.563rem, 1.287rem + 1.23vw, 1.875rem);
    font-weight: 700;
    line-height: 1.55;
    letter-spacing: 0.04em;
}

.seminar-apply-divider {
    position: relative;
    display: block;
    width: 95%;
    max-width: 260px;
    height: 1px;
    margin: 22px 0 18px;
    background: #c8ddeb;
}

.seminar-apply-divider::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    background: var(--color-sub);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 8px #fff;
}

.seminar-apply-text {
    display: block;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.8;
    text-align: center;
    margin-bottom: 24px;
}

.seminar-apply-text .seminar-apply-chunk {
    display: inline-block;
    white-space: nowrap;
}

.seminar-apply-arrow {
    width: clamp(4.25rem, 4.029rem + 0.98vw, 4.5rem);
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-main);
    color: #fff;
    font-size: clamp(1.875rem, 1.324rem + 2.45vw, 2.5rem);
    box-shadow: 0 5px 14px rgba(31, 78, 121, 0.25);
    transition:
        background 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

.seminar-notice .section-inner {
    padding: 16px;
    background-color: #f2f2f2;
}

.seminar-notice-title {
    display: flex;
    justify-content: start;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    color: var(--color-main);
}

.seminar-notice-title p {
    font-size: clamp(1.5rem, 1.169rem + 1.47vw, 1.875rem);
    font-weight: 800;
}

.seminar-notice-title i {
    font-size: clamp(1.25rem, 0.809rem + 1.96vw, 1.75rem);
    transform: translateY(clamp(0rem, -0.11rem + 0.49vw, 0.125rem));
}

.seminar-notice .section-inner ul {
    position: relative;
    padding-bottom: 16px;
}

.seminar-notice .section-inner ul li::before {
    content: "・";
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 700;
}

.seminar-notice .section-inner ul li {
    position: relative;
    font-size: clamp(0.813rem, 0.647rem + 0.74vw, 1rem);
    padding-left: 1em;
    line-height: 1.7;
}

.seminar-notice .section-inner ul li + li {
    margin-top: 4px;
}

.back-top {
    display: flex;
    justify-content: center;
    margin: 40px 0 56px;
}

.back-top-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    min-width: 220px;
    min-height: 52px;
    padding: 10px 28px;
    border: 2px solid var(--color-main);
    border-radius: 999px;
    background: #fff;
    color: var(--color-main);
    font-size: 22px;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
}

.back-top-button i {
    font-size: 32px;
    line-height: 1;
}

.back-top-button span {
    line-height: 1;
    transform: translateY(-1px);
}

.seminar-session[id] {
    scroll-margin-top: 120px;
}

@media (min-width: 769px) {
    .sp-only {
        display: none;
    }

    .seminar-intro {
        padding: 8px 0 16px;
    }

    .seminar-intro-inner {
        grid-template-columns:
            minmax(0, 1fr)
            minmax(260px, 0.6fr);
        gap: clamp(1.5rem, 3vw, 3rem);
    }

    .seminar-intro-text {
        max-width: none;
    }

    .seminar-intro-title {
        gap: clamp(2rem, 1.666rem + 0.7vw, 2.5rem);
        margin-bottom: 18px;
    }

    .seminar-intro-icon {
        width: clamp(4.688rem, 3.226rem + 3.04vw, 6.875rem);
    }

    .seminar-intro-title h2 {
        font-size: clamp(2.188rem, 1.561rem + 1.3vw, 3.125rem);
    }

    .seminar-intro-text p {
        font-size: clamp(1rem, 0.833rem + 0.35vw, 1.25rem);
    }

    .seminar-registration {
        display: flex;
        justify-content: start;
        align-items: center;
        gap: 0;
        padding: 16px clamp(1.5rem, 0.832rem + 1.39vw, 2.5rem);
    }

    .seminar-registration-heading {
        flex-shrink: 0;
        white-space: nowrap;
        gap: 12px;
        padding: 0;
        padding-right: 16px;
        border: none;
        font-size: clamp(1.5rem, 2.2vw, 2.125rem);
    }

    .seminar-registration-description {
        flex: 1;
        min-width: 0;
        margin: 0;
        padding-left: 16px;
        border-left: 1px solid #bdcfdf;
    }

    .seminar-registration-description p {
        font-size: clamp(0.875rem, 1vw, 1rem);
    }

    .seminar-registration-description p + p {
        margin-top: 8px;
    }

    .seminar-design-c .seminar-list {
        gap: 32px;
    }

    .seminar-design-c .seminar-session-inner {
        padding: clamp(1.5rem, 0.999rem + 1.043vw, 2.25rem);
    }

    .seminar-design-c .seminar-session-meta {
        gap: 0 clamp(1rem, 0.666rem + 0.695vw, 1.5rem);
        margin-bottom: 24px;
        padding-bottom: 16px;
    }

    .seminar-design-c .seminar-session-number {
        gap: 3px;
        padding: 10px 14px;
    }

    .seminar-design-c .seminar-session-number span,
    .seminar-design-c .seminar-session-number strong {
        font-size: clamp(1.125rem, 1.041rem + 0.174vw, 1.25rem);
    }

    .seminar-design-c .seminar-session-schedule {
        gap: 8px;
    }

    .seminar-design-c .seminar-session-time {
        font-size: clamp(1.125rem, 0.958rem + 0.348vw, 1.375rem);
    }

    .seminar-design-c .seminar-session-time i {
        font-size: clamp(1.063rem, 0.937rem + 0.261vw, 1.25rem);
    }

    .seminar-design-c .seminar-session-company {
        font-size: clamp(1.25rem, 1.166rem + 0.174vw, 1.375rem);
    }

    .seminar-design-c .seminar-session-side {
        gap: 8px;
    }

    .seminar-design-c .seminar-session-watermark {
        font-size: clamp(4.375rem, 3.289rem + 2.259vw, 6rem);
    }

    .seminar-design-c .seminar-session-capacity {
        padding: 5px 12px;
        font-size: clamp(0.938rem, 0.896rem + 0.087vw, 1rem);
    }

    .seminar-design-c .seminar-session-title {
        font-size: clamp(1.5rem, 1.333rem + 0.348vw, 1.75rem);
    }

    .seminar-design-c .seminar-session-description {
        margin-top: 26px;
        padding: 24px;
    }

    .seminar-design-c .seminar-session-label {
        font-size: 14px;
    }

    .seminar-design-c .seminar-catch {
        font-size: clamp(1.125rem, 1.041rem + 0.174vw, 1.25rem);
    }

    .seminar-design-c .seminar-session-text {
        font-size: 16px;
    }

    .seminar-design-c .seminar-session-closed {
        gap: 16px;
        padding: 12px 24px;
    }

    .seminar-design-c .seminar-session-closed strong {
        font-size: 20px;
    }

    .seminar-design-c .seminar-session-closed span {
        font-size: 14px;
    }

    .seminar-apply {
        margin-top: clamp(4rem, 2.664rem + 2.78vw, 6rem);
        padding: clamp(1rem, 0.666rem + 0.7vw, 1.5rem) 0 72px;
    }

    .seminar-apply-heading {
        font-size: clamp(1.875rem, 1.457rem + 0.87vw, 2.5rem);
    }

    .seminar-apply-card {
        max-width: 620px;
        margin-top: clamp(4.5rem, 3.832rem + 1.39vw, 5.5rem);
        padding: 68px 48px 36px;
        border-radius: 22px;
    }

    .seminar-apply-icon {
        width: 88px;
        font-size: 40px;
    }

    .seminar-apply-title {
        font-size: 34px;
        line-height: 1.45;
    }

    .seminar-apply-divider {
        margin: 26px 0 22px;
        max-width: 340px;
    }

    .seminar-apply-text {
        font-size: clamp(1rem, 0.833rem + 0.35vw, 1.25rem);
    }

    .seminar-apply-arrow {
        width: 76px;
        font-size: 34px;
        transition:
            transform 0.2s ease,
            background 0.2s ease;
    }

    .seminar-apply-arrow:hover .seminar-apply-arrow {
        transform: translateX(4px);
    }

    .seminar-apply-note {
        font-size: 14px;
    }

    .seminar-apply-arrow:hover {
        background: var(--color-sub);
        transform: translateX(5px);
        box-shadow: 0 7px 18px rgba(31, 78, 121, 0.32);
    }

    .seminar-notice {
        margin-top: 16px;
    }

    .seminar-notice .section-inner {
        padding: 16px clamp(1rem, 0.666rem + 0.7vw, 1.5rem);
    }

    .seminar-notice-title i {
        font-size: 28px;
        transform: translateY(-1px);
    }

    .seminar-notice-title p {
        font-size: clamp(1.625rem, 1.458rem + 0.35vw, 1.875rem);
    }

    .seminar-notice .section-inner ul li {
        font-size: clamp(1rem, 0.833rem + 0.35vw, 1.25rem);
    }

    .back-top-button {
        justify-content: start;
        gap: clamp(1.875rem, -1.382rem + 6.78vw, 6.75rem);
        width: clamp(16.875rem, 9.359rem + 15.64vw, 28.125rem);
        transform: translateY(0);
        font-size: clamp(1.375rem, 1.166rem + 0.43vw, 1.688rem);
        transition:
            background 0.25s ease,
            color 0.25s ease,
            transform 0.25s ease;
    }

    .back-top-button:hover {
        background: var(--color-main, #1f4e79);
        color: #fff;
        transform: translateY(-2px);
    }

}