/* F205. Interactive course preview, same design tokens as the website. */
.preview-page {
    padding-block: 64px 70px;
}
.preview-heading {
    max-width: 780px;
    margin-bottom: 40px;
}
[data-guest-preview] [data-preview-legacy] {
    overflow-wrap: anywhere;
    margin-bottom: 24px;
}
.preview-heading h1 {
    margin-bottom: 20px;
}
.preview-workspace {
    display: grid;
    grid-template-columns: minmax(320px, 0.9fr) 1.1fr;
    gap: 28px;
}
.preview-input-card {
    border: 1px solid #dfe6ef;
    border-radius: 12px;
    padding: 30px;
    background: #fff;
}
.preview-input-card h2 {
    font-size: 24px;
}
.preview-source-tabs {
    display: flex;
    border-radius: 7px;
    background: #f1f4f8;
    gap: 3px;
    padding: 4px;
    margin-block: 22px 28px;
}
.preview-source-tabs button {
    flex: 1;
    min-height: 44px;
    border: 0;
    background: transparent;
    color: #536079;
    border-radius: 5px;
    font-size: 13px;
    font-weight: 650;
}
.preview-source-tabs button[aria-pressed='true'] {
    background: #fff;
    color: #155c9e;
    box-shadow: 0 2px 5px #090f3710;
}
.preview-input-card h3 {
    font-size: 19px;
    margin-bottom: 12px;
}
.preview-input-card p {
    font-size: 14px;
    color: #536079;
    line-height: 1.7;
}
.preview-file-button {
    position: relative;
    overflow: hidden;
    margin-block: 22px 12px;
}
.preview-file-button input {
    position: absolute;
    inset: 0;
    opacity: 0;
    width: 100%;
    cursor: pointer;
}
.preview-file-button:focus-within {
    outline: 3px solid #1975c8;
    outline-offset: 4px;
}
.preview-small,
.preview-input-card .preview-small {
    font-size: 12px;
    color: #59657a;
    margin-top: 10px;
}
.preview-data-note {
    border-top: 1px solid #e4e9f0;
    padding-top: 18px;
    margin-top: 18px;
}
.preview-input-card .preview-data-note {
    font-size: 12px;
}
.preview-drop {
    padding: 22px 12px;
    margin-block: 20px;
    border: 1px dashed #c3d0df;
    text-align: center;
    border-radius: 7px;
    font-size: 12px;
    color: #536079;
}
.preview-drop.is-dragging {
    background: #eaf3fb;
    border-color: #1975c8;
}
.preview-input-card .preview-picked {
    overflow-wrap: anywhere;
    margin-bottom: 15px;
    color: #155c9e;
}
.preview-input-card .preview-error,
.preview-error {
    background: #fff0ef;
    color: #932f2f;
    padding: 15px;
    border-radius: 7px;
    margin-top: 15px;
}
.preview-input-card textarea {
    width: 100%;
    display: block;
    min-height: 160px;
    resize: vertical;
    padding: 14px;
    border: 1px solid #c9d3e0;
    border-radius: 7px;
    font: 12px/1.6 monospace;
    margin-top: 10px;
}
.preview-empty {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    border-radius: 12px;
    background: #f3f6fa;
    padding: 50px 30px;
    gap: 24px;
}
.preview-empty h2 {
    font-size: 38px;
}
.preview-empty p {
    color: #647087;
    font-size: 15px;
}
.preview-orbit-icon {
    font-size: 60px;
    color: #1975c8;
}
[data-guest-preview]:has(.preview-result:not([hidden])) .preview-empty {
    display: none;
}
[data-guest-preview]:has(.preview-result:not([hidden])) .preview-workspace {
    display: block;
}
[data-guest-preview]:has(.preview-result:not([hidden])) .preview-input-card {
    max-width: 780px;
}
.preview-result {
    margin-top: 48px;
    border: 1px solid #dfe6ef;
    border-radius: 13px;
    overflow: hidden;
}
.course-viewer-stage {
    scroll-margin-top: 0;
}
.preview-result-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
    padding: 30px;
}
.preview-result-head h2 {
    font-size: 30px;
}
.preview-result-head .eyebrow {
    margin-bottom: 10px;
}
.preview-result-head [aria-pressed='true'] {
    background: #edf4fb;
    border-color: #1975c8;
    color: #115d9f;
}
.preview-result-head p:not(.eyebrow) {
    color: #59657a;
    font-size: 13px;
    margin-top: 12px;
}
.course-viewport {
    height: min(clamp(390px, 60vw, 660px), max(200px, calc(100svh - 180px)));
    position: relative;
    background: #fff;
    overflow: hidden;
}
.course-viewport canvas {
    display: block;
    width: 100%;
    height: 100%;
}
.course-plan {
    width: 100%;
    height: 100%;
    padding: 15px;
    overflow: auto;
    overscroll-behavior: contain;
}
.course-plan svg {
    width: 100%;
    min-width: 1050px;
    height: auto;
    display: block;
}
.viewer-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 18px 26px;
    border-bottom: 1px solid #e4e9f0;
}
.viewer-toolbar p {
    color: #59657a;
    font-size: 12px;
}
.viewer-size {
    font-size: 12px;
    color: #536079;
    display: flex;
    align-items: center;
    gap: 10px;
}
.viewer-size select {
    min-height: 44px;
    border: 1px solid #c9d3e0;
    background: #fff;
    border-radius: 6px;
    padding: 8px;
}
.viewer-toolbar .actions {
    gap: 7px;
}
.viewer-toolbar .icon-btn {
    min-width: 44px;
    min-height: 44px;
    font-size: 22px;
}
.preview-notices {
    font-size: 12px;
    line-height: 1.8;
    color: #795519;
    margin: 22px 30px;
}
.preview-result > details {
    padding: 0 30px 24px;
    font-size: 13px;
}
.preview-recognition-note {
    padding: 20px 30px;
    font-size: 14px;
    background: #fff8e8;
    color: #725322;
}
.preview-save {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 35px;
    padding: 35px 30px;
    background: #edf4fb;
}
.preview-save h3 {
    margin-bottom: 15px;
}
.preview-save p {
    font-size: 14px;
    color: #536079;
}
.preview-save-fields {
    display: grid;
    gap: 10px;
    align-content: start;
}
.preview-save-fields label {
    font-size: 12px;
    font-weight: 650;
}
.preview-save-fields input {
    min-width: 0;
    width: 100%;
    border: 1px solid #bccbdd;
    border-radius: 7px;
    padding: 12px;
    background: #fff;
}
.preview-support {
    margin-top: 32px;
    font-size: 13px;
    color: #155c9e;
}
.preview-not-open {
    padding: 35px;
    background: #edf4fb;
    border-radius: 12px;
}
.preview-not-open h1 {
    font-size: 28px;
    margin-bottom: 18px;
}
.preview-not-open p {
    margin-bottom: 20px;
}
.public-import-fallback > .lede {
    max-width: 700px;
    margin-block: 24px;
}
.public-import-fallback .preview-input-card {
    max-width: 720px;
}
.legacy-file-choice {
    display: grid;
    gap: 16px;
    cursor: pointer;
    position: relative;
}
.legacy-file-choice input {
    position: absolute;
    inset: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}
.legacy-file-choice:focus-within {
    outline: 3px solid #1975c8;
    outline-offset: 4px;
}
.legacy-import-example {
    margin-top: 35px;
    padding-top: 28px;
    border-top: 1px solid #dfe6ef;
    max-width: 720px;
}
.legacy-import-example h2 {
    font-size: 26px;
}
.legacy-import-example p {
    margin-block: 16px;
    font-size: 15px;
    line-height: 1.7;
}
.legacy-image-example {
    margin-top: 25px;
}
.public-import-fallback .actions {
    flex-wrap: wrap;
}
[data-guest-preview]:has([data-source-choice='image']:not([hidden]))
    [data-image-preview-fallback] {
    display: none;
}
body:has([data-guest-preview]:not([hidden])) [data-guest-preview-unavailable] {
    display: none;
}
@media (max-width: 760px) {
    .preview-page {
        padding-top: 36px;
    }
    .preview-workspace {
        grid-template-columns: 1fr;
    }
    .preview-input-card {
        padding: 24px 20px;
    }
    .preview-empty {
        min-height: 290px;
    }
    .preview-result-head {
        flex-direction: column;
        align-items: start;
        padding: 24px 20px;
    }
    .preview-result-head h2 {
        font-size: 26px;
    }
    .preview-save {
        grid-template-columns: 1fr;
        padding: 26px 20px;
    }
    .viewer-toolbar {
        padding: 18px;
    }
    .viewer-toolbar .btn {
        padding-inline: 12px;
        font-size: 11px;
    }
    .preview-notices {
        margin-inline: 22px;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

.preview-result-head > div {
    min-width: 0;
}
/* Reserve space for the complete control surface below the sticky site header.
   The canvas receives the remaining space, rather than consuming 100svh itself. */
@media (min-width: 1000px) and (min-height: 600px) {
    .course-viewer-stage {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto minmax(160px, 1fr) auto;
        height: min(820px, calc(100svh - 116px));
    }
    .course-viewer-stage .course-viewport {
        height: 100%;
        min-height: 0;
        min-width: 0;
    }
    .preview-result-head {
        padding: 16px 24px;
        gap: 18px;
    }
    .preview-result-head h2 {
        font-size: 24px;
        margin: 0;
    }
    .preview-result-head .eyebrow {
        margin-bottom: 4px;
    }
    .preview-result-head p:not(.eyebrow) {
        margin-top: 6px;
    }
    .viewer-toolbar {
        padding: 10px 24px;
        gap: 8px 16px;
    }
    .viewer-toolbar [data-viewer-instructions] {
        flex: 1 1 240px;
        text-align: center;
    }
}
.preview-result-head h2 {
    overflow-wrap: anywhere;
}