:root {
    --bg: #f5efe4;
    --bg-soft: #fbf8f3;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --surface-muted: #f3eee5;
    --line: rgba(122, 107, 88, 0.12);
    --line-strong: rgba(122, 107, 88, 0.2);
    --text: #1f1a16;
    --muted: #7f7367;
    --primary: #101010;
    --accent: #de5f2d;
    --accent-soft: rgba(222, 95, 45, 0.12);
    --shadow-soft: 0 16px 38px rgba(62, 39, 19, 0.08);
    --shadow-card: 0 24px 70px rgba(66, 49, 31, 0.08);
    --radius-xl: 30px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.88), transparent 32%),
        linear-gradient(135deg, #f8f4ee 0%, #f4ebdf 42%, #f1e7da 100%);
    color: var(--text);
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button,
textarea,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

img {
    display: block;
}

.workbench-shell {
    display: grid;
    grid-template-columns: 520px 72px minmax(0, 1fr);
    min-height: 100vh;
}

.chat-pane {
    display: grid;
    grid-template-rows: auto auto auto minmax(0, 1fr) auto auto;
    gap: 12px;
    padding: 14px 16px 18px;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(251, 248, 243, 0.88));
    backdrop-filter: blur(18px);
}

.chat-topbar,
.canvas-topbar,
.canvas-meta-row,
.canvas-footer,
.drawer-head,
.composer-tools,
.recent-head,
.version-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.workspace-brand,
.topbar-icons,
.toolbar-left,
.toolbar-right,
.quick-actions,
.canvas-meta,
.footer-actions,
.template-tabs,
.drawer-actions,
.banner-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.workspace-brand {
    gap: 12px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #201914, #7d4d2f);
    color: #fff7ef;
    font-size: 0.92rem;
    font-weight: 800;
    box-shadow: var(--shadow-soft);
}

.brand-eyebrow,
.workspace-brand h1,
.workspace-banner h2,
.canvas-meta-row h2,
.recent-head h2,
.version-head h2,
.drawer-head h2 {
    margin: 0;
}

.brand-eyebrow,
.eyebrow {
    color: var(--muted);
    font-size: 0.73rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.workspace-brand h1 {
    font-size: 1.15rem;
    font-weight: 700;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    color: var(--text);
    box-shadow: 0 6px 16px rgba(53, 39, 23, 0.04);
}

.icon-btn.ghost {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
}

.glass-card {
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(22px);
}

.workspace-banner {
    padding: 16px 18px;
    border-radius: 24px;
}

.workspace-banner p {
    margin: 8px 0 0;
    color: var(--muted);
    line-height: 1.55;
}

.banner-tags {
    margin-top: 14px;
}

.banner-tags span,
.canvas-meta span,
.version-tip {
    border-radius: 999px;
    background: var(--surface-muted);
    color: var(--muted);
    font-size: 0.84rem;
    padding: 8px 12px;
}

.template-drawer {
    padding: 14px;
    border-radius: 24px;
}

.text-btn,
.tool-link {
    border: 0;
    background: transparent;
    color: var(--muted);
    padding: 0;
}

.text-btn:hover,
.tool-link:hover {
    color: var(--text);
}

.template-tab,
.quick-chip,
.tool-action,
.mode-pill,
.selection-chip {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.94);
    color: var(--text);
    border-radius: 999px;
    padding: 10px 16px;
    font-weight: 700;
    transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.template-tab.active,
.tool-action.active,
.mode-pill.active,
.selection-chip.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.template-tab:hover,
.quick-chip:hover,
.tool-action:hover,
.selection-chip:hover,
.mode-pill:hover {
    transform: translateY(-1px);
}

.template-list {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.template-card {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--line);
}

.template-title-row,
.template-meta,
.template-actions {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
}

.template-card h3,
.template-card p {
    margin: 0;
}

.template-card p {
    margin-top: 8px;
    color: var(--muted);
    line-height: 1.5;
}

.template-category {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.82rem;
}

.template-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.template-tag {
    border-radius: 999px;
    padding: 6px 10px;
    background: var(--surface-muted);
    color: #60554a;
    font-size: 0.8rem;
}

.template-actions button {
    border: 0;
    background: transparent;
    color: var(--accent);
    font-weight: 700;
    padding: 0;
}

.chat-scroll {
    min-height: 0;
    overflow: auto;
    padding: 4px 2px;
    display: grid;
    gap: 12px;
}

.chat-message {
    display: grid;
    gap: 10px;
    max-width: 80%;
}

.chat-message.user {
    justify-self: end;
    max-width: 72%;
}

.chat-role {
    display: none;
}

.chat-bubble {
    margin: 0;
    padding: 14px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    line-height: 1.6;
    box-shadow: 0 10px 24px rgba(65, 47, 28, 0.04);
}

.chat-message.user .chat-bubble {
    background: linear-gradient(180deg, rgba(250, 245, 237, 0.96), rgba(245, 239, 228, 0.94));
}

.chat-visual {
    width: 176px;
    border-radius: 22px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--line);
    box-shadow: 0 16px 30px rgba(50, 37, 22, 0.08);
}

.chat-thumb {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border-radius: 16px;
    border: 1px solid var(--line-strong);
}

.chat-caption {
    display: block;
    margin-top: 8px;
    font-size: 0.82rem;
    color: var(--muted);
}

.left-recent {
    display: grid;
    gap: 10px;
    padding: 14px;
    border-radius: 24px;
}

.recent-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.recent-card,
.version-card {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    border-radius: 18px;
    padding: 8px;
}

.recent-card {
    text-align: left;
}

.recent-card img,
.version-card img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border-radius: 14px;
}

.recent-card strong,
.version-card strong {
    display: block;
    margin-top: 8px;
    font-size: 0.82rem;
}

.recent-card span,
.version-card span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.76rem;
}

.composer-shell {
    display: grid;
    gap: 12px;
}

.quick-actions {
    overflow: auto;
    padding-bottom: 2px;
}

.quick-chip {
    flex: 0 0 auto;
}

.composer-box {
    border-radius: 28px;
    padding: 16px 16px 14px;
}

#promptInput {
    width: 100%;
    min-height: 76px;
    resize: none;
    border: 0;
    outline: none;
    background: transparent;
    padding: 2px 0 14px;
    font-size: 1rem;
    color: var(--text);
}

#promptInput::placeholder {
    color: #968a7d;
}

.mode-pill,
.tool-link,
.upload-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
}

.upload-link {
    position: relative;
    color: var(--text);
}

.upload-link input {
    position: absolute;
    inset: 0;
    opacity: 0;
}

.send-btn {
    min-width: 72px;
    height: 42px;
    border-radius: 999px;
    border: 0;
    background: #111;
    color: #fff;
    font-weight: 700;
    margin-left: auto;
    padding: 0 18px;
}

.send-btn:disabled {
    opacity: 0.7;
    cursor: wait;
}

.pane-arrow {
    display: grid;
    place-items: center;
    align-self: center;
    width: 44px;
    height: 44px;
    margin: 0 auto;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    color: #666;
    box-shadow: var(--shadow-soft);
}

.canvas-pane {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 12px;
    padding: 10px 12px 14px 0;
    min-height: 100vh;
}

.canvas-topbar,
.canvas-body,
.version-bar {
    border-radius: 28px;
    padding: 12px 14px;
}

.canvas-topbar {
    background: rgba(255, 255, 255, 0.92);
}

.tool-action.secondary {
    background: rgba(255, 255, 255, 0.66);
    color: var(--text);
}

.canvas-body {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 12px;
}

.canvas-stage {
    position: relative;
    display: grid;
    place-items: center;
    overflow: hidden;
    min-height: 0;
    border-radius: 30px;
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.85), transparent 34%),
        linear-gradient(180deg, #f5efe6 0%, #efe7dc 100%);
    border: 1px solid rgba(122, 107, 88, 0.08);
}

.canvas-plate {
    width: calc(100% - 40px);
    height: calc(100% - 58px);
    min-height: 560px;
    margin: 40px 20px 20px;
    border-radius: 28px;
    display: grid;
    place-items: center;
    background: rgba(246, 241, 233, 0.84);
}

.stage-hint {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    max-width: calc(100% - 32px);
    padding: 9px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.86rem;
}

.selection-toolbar {
    position: absolute;
    top: 62px;
    left: 16px;
    z-index: 2;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.selection-box {
    position: absolute;
    left: 23%;
    top: 24%;
    width: 32%;
    height: 24%;
    z-index: 2;
    border: 2px dashed var(--accent);
    border-radius: 18px;
    background: var(--accent-soft);
    display: grid;
    place-items: center;
    color: var(--accent);
    font-weight: 700;
}

.poster-preview {
    width: min(100%, 760px);
    max-height: min(100%, calc(100vh - 290px));
    object-fit: contain;
    border-radius: 24px;
    box-shadow: 0 30px 60px rgba(62, 39, 19, 0.14);
}

.footer-note {
    display: grid;
    gap: 4px;
    color: var(--muted);
    line-height: 1.5;
}

.version-bar {
    display: grid;
    gap: 10px;
}

.version-strip {
    display: flex;
    gap: 12px;
    overflow: auto;
    padding-bottom: 2px;
}

.version-card {
    flex: 0 0 132px;
    text-align: left;
}

.version-card.active {
    outline: 2px solid rgba(222, 95, 45, 0.9);
    outline-offset: 0;
}

.version-card:hover {
    transform: translateY(-1px);
}

.template-drawer[hidden],
.selection-toolbar[hidden],
.selection-box[hidden] {
    display: none !important;
}

@media (max-width: 1320px) {
    .workbench-shell {
        grid-template-columns: 460px 56px minmax(0, 1fr);
    }

    .recent-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1120px) {
    .workbench-shell {
        grid-template-columns: 1fr;
    }

    .pane-arrow {
        display: none;
    }

    .chat-pane {
        border-right: 0;
        min-height: auto;
    }

    .canvas-pane {
        padding: 0 12px 12px;
        min-height: auto;
    }

    .canvas-plate {
        min-height: 500px;
    }
}

@media (max-width: 760px) {
    .chat-pane,
    .canvas-pane {
        padding: 10px;
    }

    .chat-topbar,
    .canvas-topbar,
    .canvas-meta-row,
    .canvas-footer,
    .drawer-head,
    .composer-tools,
    .recent-head,
    .version-head {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-left,
    .toolbar-right,
    .canvas-meta,
    .footer-actions,
    .template-tabs,
    .quick-actions,
    .recent-strip,
    .banner-tags {
        width: 100%;
    }

    .recent-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .chat-message,
    .chat-message.user {
        max-width: 100%;
    }

    .chat-visual {
        width: 100%;
    }

    .canvas-plate {
        width: calc(100% - 20px);
        min-height: 420px;
        margin: 52px 10px 10px;
    }

    .poster-preview {
        width: 100%;
        max-height: 100%;
    }

    .send-btn {
        margin-left: 0;
        width: 100%;
    }
}