/* Classroom host layout: top controls, a projection area, and a static join panel.
   Opt-in variant follows the established wordcloud layout; other simulators keep their drawers. */
.sim-app-shell[data-layout="classroom"] {
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(300px, 25vw, 360px);
    grid-template-rows: auto minmax(0, 1fr);
}
.sim-app-shell[data-layout="classroom"] > .sim-panel-header {
    grid-column: 1 / -1;
    gap: 24px;
    min-height: 76px;
    padding: max(16px, env(safe-area-inset-top)) 28px max(16px, env(safe-area-inset-top)) 76px;
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    cursor: default;
}
.sim-app-shell[data-layout="classroom"] > .sim-panel-header .sim-panel-title {
    width: auto;
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.sim-app-shell[data-layout="classroom"] #host-toolbar {
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 20px;
}
.sim-app-shell[data-layout="classroom"] #host-toolbar .sim-toggle {
    flex: none;
    min-height: 48px;
    gap: 10px;
    padding: 0;
    border: 0;
    color: #475569;
    background: transparent;
}
.sim-app-shell[data-layout="classroom"] #host-toolbar .sim-toggle-input:focus-visible + .sim-toggle-track {
    outline: 3px solid #3b82f6;
    outline-offset: 4px;
}
.sim-app-shell[data-layout="classroom"] #host-toolbar .sim-btn {
    flex: none;
    border-radius: 10px;
    white-space: nowrap;
}
.sim-app-shell[data-layout="classroom"] > .sim-panel {
    width: auto;
    height: auto;
    min-height: 0;
    border-radius: 0;
    border-top: 0;
    border-left: 1px solid #e2e8f0;
    background: #fff;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: none;
}
.sim-app-shell[data-layout="classroom"] > .sim-panel > .sim-panel-body {
    padding: 30px 24px max(24px, env(safe-area-inset-bottom));
    gap: 20px;
}
.sim-app-shell[data-layout="classroom"] .sim-canvas-container {
    background: #f8fafc;
}
.sim-app-shell[data-layout="classroom"] #question-editor {
    position: absolute;
    inset: 0;
    max-width: 720px;
    margin-inline: auto;
    padding: 32px 40px 56px;
    touch-action: pan-y;
}
.sim-app-shell[data-layout="classroom"] [data-role="qr"] {
    align-self: center;
    padding: 12px;
    margin: 0 auto;
    background: #f8fafc;
    border-color: #e2e8f0;
}
.sim-app-shell[data-layout="classroom"] [data-role="qr"] img {
    width: min(224px, 100%);
    height: auto;
    aspect-ratio: 1;
    image-rendering: pixelated;
}
.sim-app-shell[data-layout="classroom"] [data-role="room"] {
    gap: 10px;
    padding-block: 10px 4px;
    text-align: center;
}
.sim-app-shell[data-layout="classroom"] [data-role="room"] > p {
    font-weight: 700;
    letter-spacing: 0.16em;
}
.sim-app-shell[data-layout="classroom"] #room-code {
    color: #657954;
    font-family: 'Orbitron', 'Courier New', monospace;
    font-size: clamp(2rem, 3vw, 2.75rem);
    letter-spacing: 0.08em;
}
.sim-app-shell[data-layout="classroom"] #client-link {
    overflow-wrap: anywhere;
    text-decoration: none;
    line-height: 1.55;
}
.sim-app-shell[data-layout="classroom"] #client-link:hover { text-decoration: underline; }
.sim-app-shell[data-layout="classroom"] [data-role="participation"] {
    align-items: center;
    gap: 6px;
    background: #f8fafc;
    border-color: #e2e8f0;
}
.sim-app-shell[data-layout="classroom"] #total {
    color: #657954;
    font: 900 2.25rem/1.2 'Noto Sans TC', sans-serif;
}
.sim-app-shell[data-layout="classroom"] #join-placeholder { text-align: center; }
.sim-app-shell[data-layout="classroom"] #results { padding-top: 12px; }
.sim-app-shell[data-layout="classroom"] summary { cursor: pointer; }

@media (max-width: 1024px) {
    .sim-app-shell[data-layout="classroom"] > .sim-panel-header { gap: 12px; padding-right: 20px; }
    .sim-app-shell[data-layout="classroom"] #host-toolbar { gap: 12px; }
    .sim-app-shell[data-layout="classroom"] #host-toolbar .sim-toggle { font-size: 0.875rem; }
    .sim-app-shell[data-layout="classroom"] #host-toolbar .sim-btn { padding-inline: 12px; font-size: 0.875rem; }
}
@media (max-width: 768px) {
    html:has(.sim-app-shell[data-layout="classroom"]),
    body:has(.sim-app-shell[data-layout="classroom"]) {
        height: auto;
        min-height: 100dvh;
        overflow-x: hidden;
        overflow-y: auto;
    }
    .sim-app-shell[data-layout="classroom"] {
        width: 100%;
        height: auto;
        min-height: 100dvh;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto auto auto;
        overflow: visible;
    }
    .sim-app-shell[data-layout="classroom"] > .sim-panel-header {
        flex-direction: column;
        padding: max(20px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 16px max(16px, env(safe-area-inset-left));
    }
    .sim-app-shell[data-layout="classroom"] > .sim-panel-header .sim-panel-title {
        min-height: 40px;
        justify-content: center;
        font-size: 1.35rem;
    }
    .sim-app-shell[data-layout="classroom"] #host-toolbar {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
        gap: 10px;
    }
    .sim-app-shell[data-layout="classroom"] #host-toolbar .sim-toggle {
        justify-content: space-between;
        padding: 10px;
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        border-radius: 10px;
    }
    .sim-app-shell[data-layout="classroom"] .sim-canvas-container {
        min-height: clamp(360px, 50dvh, 480px);
    }
    .sim-app-shell[data-layout="classroom"] #question-editor {
        position: relative;
        inset: auto;
        padding: 24px max(20px, env(safe-area-inset-right)) 56px max(20px, env(safe-area-inset-left));
    }
    .sim-app-shell[data-layout="classroom"] > .sim-panel {
        overflow: visible;
        border-left: 0;
        border-top: 1px solid #e2e8f0;
    }
    .sim-app-shell[data-layout="classroom"] > .sim-panel > .sim-panel-body {
        overflow: visible;
        padding-inline: max(24px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-left));
    }
    .sim-app-shell[data-layout="classroom"] #room-code { font-size: 2.5rem; }
}

/* Button voting uses the same shared buttons, with an opt-in participant state. */
.sim-app-shell[data-layout="poll-client"] #choices .sim-btn {
    display: flex;
    flex: none;
    width: 100%;
    min-height: 64px;
    justify-content: flex-start;
    gap: 14px;
    padding: 14px 16px;
    border: 1px solid #cbd5e1;
    border-radius: 14px;
    background: #fff;
    color: #1e293b;
    text-align: left;
    line-height: 1.5;
}
.sim-app-shell[data-layout="poll-client"] #choices .sim-btn:hover:not(:disabled) {
    background: #f4f6ef;
    border-color: #657954;
}
.sim-app-shell[data-layout="poll-client"] #choices .sim-btn[aria-pressed="true"] {
    background: #657954;
    border-color: #657954;
    color: #fff;
}
.sim-app-shell[data-layout="poll-client"] #choices .sim-btn[aria-pressed="true"]:hover:not(:disabled) {
    background: #526344;
}
.sim-app-shell[data-layout="poll-client"] #choices .sim-btn[aria-pressed="true"]:disabled { opacity: 1; }
.sim-app-shell[data-layout="poll-client"] #choices [data-role="option-key"] {
    flex: 0 0 36px;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: #edf1e9;
    color: #33412b;
    font-weight: 700;
}
.sim-app-shell[data-layout="poll-client"] #choices [aria-pressed="true"] [data-role="option-key"] {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}
.sim-app-shell[data-layout="poll-client"] #choices [data-role="option-text"] {
    flex: 1;
    min-width: 0;
    overflow-wrap: anywhere;
}
.sim-app-shell[data-layout="poll-client"] #choices svg {
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    visibility: hidden;
}
.sim-app-shell[data-layout="poll-client"] #choices [aria-pressed="true"] svg { visibility: visible; }
@media (max-width: 768px) {
    .sim-app-shell[data-layout="classroom"] #host-toolbar:has(#count-votes:not([hidden])) #fullscreen { grid-column: 1 / -1; }
}