.avatar-ai-hero {
    padding: 72px 24px 40px;
    background: radial-gradient(circle at 18% 16%, rgba(9, 198, 249, 0.24), transparent 26%), linear-gradient(150deg, #1b2cff 0%, #6a32ff 58%, #00b8ff 100%);
    color: #fff;
}

.avatar-ai-hero-inner {
    max-width: 1120px;
    margin: 0 auto;
}

.avatar-ai-hero h1 {
    margin: 12px 0;
    font-size: clamp(2rem, 4vw, 4rem);
    line-height: 1.12;
    letter-spacing: -0.03em;
}

.avatar-ai-hero p {
    max-width: 760px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.05rem;
    line-height: 1.9;
}

.avatar-ai-hero-tags {
    margin-top: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

    .avatar-ai-hero-tags span {
        padding: 8px 12px;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.16);
        font-size: 0.86rem;
    }

.avatar-ai-demo-section {
    padding: 48px 24px 80px;
    background: transparent;
}

.avatar-ai-demo-layout {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    gap: 24px;
}

.avatar-ai-stage,
.avatar-ai-chat-panel {
    background: #fff;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: var(--radius-md, 22px);
    box-shadow: var(--shadow-sm, 0 12px 30px rgba(27, 56, 143, 0.08));
    overflow: hidden;
}

.avatar-ai-stage-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

    .avatar-ai-stage-header span {
        display: block;
        font-weight: 800;
    }

    .avatar-ai-stage-header small {
        color: #64748b;
    }

.avatar-ai-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #16a34a;
    font-size: 0.86rem;
    font-weight: 700;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #22c55e;
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.16);
}

.avatar-ai-unity-placeholder {
    min-height: 620px;
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.03), rgba(15, 23, 42, 0.01)), #ffffff;
    padding: 24px;
    text-align: center;
}

.avatar-ai-card {
    max-width: 360px;
}

.avatar-ai-face-placeholder {
    width: 190px;
    height: 190px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at 30% 20%, #fff, transparent 30%), linear-gradient(135deg, #e0e7ff, #fce7f3);
    color: #334155;
    font-weight: 900;
    font-size: 2rem;
    letter-spacing: 0.08em;
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.08), 0 24px 50px rgba(79, 70, 229, 0.18);
}

.avatar-ai-card h2 {
    margin: 0 0 8px;
}

.avatar-ai-card p {
    color: #64748b;
    line-height: 1.8;
}

.avatar-ai-profile {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

    .avatar-ai-profile span {
        padding: 7px 10px;
        border-radius: 999px;
        background: #f1f5f9;
        color: #334155;
        font-size: 0.82rem;
        font-weight: 700;
    }

.avatar-ai-chat-panel {
    display: flex;
    flex-direction: column;
    min-height: 680px;
}

.avatar-ai-chat-header {
    padding: 20px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

    .avatar-ai-chat-header h2 {
        margin: 0 0 6px;
        font-size: 1.35rem;
    }

    .avatar-ai-chat-header p {
        margin: 0;
        color: #64748b;
        font-size: 0.92rem;
        line-height: 1.7;
    }

.avatar-ai-chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
    background: var(--surface-muted, #f7f9ff);
}

.chat-message {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

    .chat-message.user {
        align-items: flex-end;
    }

    .chat-message.bot {
        align-items: flex-start;
    }

.chat-speaker {
    font-size: 0.76rem;
    color: #64748b;
    font-weight: 700;
}

.chat-bubble {
    max-width: 88%;
    padding: 12px 14px;
    border-radius: 16px;
    font-size: 0.95rem;
    line-height: 1.8;
    white-space: pre-wrap;
}

.chat-message.bot .chat-bubble {
    background: #fff;
    color: #0f172a;
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.chat-message.user .chat-bubble {
    background: linear-gradient(135deg, var(--primary, #2457ff), var(--accent-2, #7b39ff), var(--accent-3, #09c6f9));
    color: #fff;
}

.avatar-ai-chat-form {
    padding: 16px;
    display: grid;
    gap: 10px;
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    background: #fff;
}

    .avatar-ai-chat-form textarea {
        width: 100%;
        resize: vertical;
        min-height: 82px;
        border: 1px solid rgba(15, 23, 42, 0.16);
        border-radius: 14px;
        padding: 12px;
        font: inherit;
        line-height: 1.7;
    }

.avatar-ai-form-actions {
    display: flex;
    justify-content: flex-end;
}

.avatar-ai-chat-form button {
    border: 0;
    border-radius: 999px;
    padding: 12px 22px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--primary, #2457ff), var(--accent-2, #7b39ff), var(--accent-3, #09c6f9));
    cursor: pointer;
}

    .avatar-ai-chat-form button:disabled {
        opacity: 0.6;
        cursor: not-allowed;
    }

@media (max-width: 920px) {
    .avatar-ai-demo-layout {
        grid-template-columns: 1fr;
    }

    .avatar-ai-unity-placeholder {
        min-height: 420px;
    }

    .avatar-ai-chat-panel {
        min-height: 580px;
    }
}

.avatar-ai-unity-frame {
    width: 100%;
    height: 720px;
    border: 0;
    display: block;
    background: #fff;
    overflow: hidden;
}

.avatar-ai-stage {
    overflow: hidden;
}

.avatar-ai-demo-layout {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    gap: 24px;
    align-items: stretch;
}

/* 左側アバター枠 */
.avatar-ai-stage {
    height: 760px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Unity iframe */
.avatar-ai-unity-frame {
    width: 100%;
    flex: 1 1 auto;
    min-height: 0;
    border: 0;
    display: block;
    background: #fff;
    overflow: hidden;
}

/* 右側チャット全体 */
.avatar-ai-chat-panel {
    height: 760px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* チャット上部説明 */
.avatar-ai-chat-header {
    flex: 0 0 auto;
    padding: 20px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

/* ここだけスクロールさせる */
.avatar-ai-chat-messages {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    background: #f8fafc;
}

/* 入力欄は下に固定 */
.avatar-ai-chat-form {
    flex: 0 0 auto;
    padding: 16px;
    display: grid;
    gap: 10px;
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    background: #fff;
}

/* ==============================
   AI Avatar Demo - Mobile Layout Fix
   既存CSSの最後に追記
============================== */

@media (max-width: 920px) {
    .avatar-ai-hero {
        padding: 48px 16px 32px;
    }

        .avatar-ai-hero h1 {
            font-size: clamp(1.9rem, 8vw, 2.8rem);
            line-height: 1.18;
        }

        .avatar-ai-hero p {
            font-size: 0.96rem;
            line-height: 1.8;
        }

    .avatar-ai-hero-tags {
        gap: 8px;
    }

        .avatar-ai-hero-tags span {
            font-size: 0.78rem;
            padding: 7px 10px;
        }

    .avatar-ai-demo-section {
        padding: 32px 16px 56px;
    }

    .avatar-ai-demo-layout {
        display: grid;
        grid-template-columns: 1fr;
        gap: 18px;
        max-width: 100%;
        width: 100%;
    }

    .avatar-ai-stage,
    .avatar-ai-chat-panel {
        width: 100%;
        height: auto;
        min-height: 0;
        border-radius: 18px;
    }

    .avatar-ai-stage-header {
        padding: 14px 16px;
        gap: 12px;
        align-items: flex-start;
    }

        .avatar-ai-stage-header small {
            display: block;
            margin-top: 2px;
            font-size: 0.76rem;
            line-height: 1.4;
        }

    .avatar-ai-status {
        flex: 0 0 auto;
        font-size: 0.78rem;
    }

    .avatar-ai-unity-frame {
        width: 100%;
        height: min(70vh, 520px);
        min-height: 360px;
        max-height: 520px;
        flex: none;
    }

    .avatar-ai-chat-panel {
        display: flex;
        flex-direction: column;
        height: auto;
        max-height: none;
    }

    .avatar-ai-chat-header {
        padding: 16px;
    }

        .avatar-ai-chat-header h2 {
            font-size: 1.2rem;
        }

        .avatar-ai-chat-header p {
            font-size: 0.88rem;
            line-height: 1.7;
        }

    .avatar-ai-chat-messages {
        flex: none;
        min-height: 260px;
        max-height: 420px;
        padding: 16px;
        overflow-y: auto;
    }

    .chat-bubble {
        max-width: 94%;
        font-size: 0.9rem;
        line-height: 1.75;
    }

    .avatar-ai-chat-form {
        padding: 14px;
    }

        .avatar-ai-chat-form textarea {
            min-height: 76px;
            font-size: 0.95rem;
        }

    .avatar-ai-form-actions {
        justify-content: stretch;
    }

    .avatar-ai-chat-form button {
        width: 100%;
        padding: 13px 18px;
    }
}

@media (max-width: 480px) {
    .avatar-ai-hero {
        padding: 40px 14px 28px;
    }

    .avatar-ai-demo-section {
        padding: 28px 12px 48px;
    }

    .avatar-ai-stage,
    .avatar-ai-chat-panel {
        border-radius: 16px;
    }

    .avatar-ai-stage-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .avatar-ai-unity-frame {
        height: 420px;
        min-height: 340px;
        max-height: 460px;
    }

    .avatar-ai-chat-messages {
        min-height: 240px;
        max-height: 360px;
    }
}

/* Avatar AI dark refinement */
.avatar-ai-hero {
    background: rgba(66, 77, 94, 0.92);
}

.avatar-ai-stage,
.avatar-ai-chat-panel,
.avatar-ai-chat-form,
.avatar-ai-stage-header {
    background: rgba(58, 67, 82, 0.88);
    border-color: var(--line, rgba(73, 89, 112, 0.62));
}

.avatar-ai-stage-header small,
.chat-speaker,
.avatar-ai-chat-header p,
.avatar-ai-card p {
    color: var(--muted, #a4b0c3);
}

.avatar-ai-unity-placeholder {
    background: rgba(52, 61, 76, 0.96);
}

.avatar-ai-face-placeholder {
    background: radial-gradient(circle at 30% 20%, rgba(243, 247, 255, 0.28), transparent 30%), linear-gradient(135deg, #455263, #394555);
    color: var(--text-strong, #f3f7ff);
    box-shadow: inset 0 0 0 1px rgba(73, 89, 112, 0.62), 0 24px 50px rgba(0, 0, 0, 0.36);
}

.avatar-ai-profile span {
    background: rgba(72, 96, 146, 0.28);
    color: #dce8ff;
    border: 1px solid rgba(112, 140, 194, 0.34);
}

.avatar-ai-chat-messages {
    background: rgba(41, 49, 62, 0.94);
}

.avatar-ai-hero,
.avatar-ai-stage,
.avatar-ai-chat-panel,
.avatar-ai-chat-form,
.avatar-ai-stage-header {
    position: relative;
    overflow: hidden;
}

.avatar-ai-hero::before,
.avatar-ai-stage::before,
.avatar-ai-chat-panel::before,
.avatar-ai-chat-form::before,
.avatar-ai-stage-header::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(260px 160px at 12% 10%, rgba(205, 221, 248, 0.08), transparent 70%), radial-gradient(380px 240px at 88% 92%, rgba(14, 20, 30, 0.10), transparent 76%);
}

.chat-message.bot .chat-bubble {
    background: rgba(48, 56, 70, 0.92);
    color: var(--text, #d9e1ef);
    border-color: var(--line, rgba(73, 89, 112, 0.62));
}

.avatar-ai-chat-form textarea {
    background: rgba(40, 48, 61, 0.96);
    border-color: var(--line, rgba(73, 89, 112, 0.62));
    color: var(--text, #d9e1ef);
}