/* ============================================================
   AI 建筑外立面设计工具专属样式
   来源：原 aigj/ai_facade.php 内联 <style>，2026-08-11 外置为可缓存文件
   ============================================================ */
/* ===== AI外立面工具专属样式（复用室内设计风格） ===== */
:root {
    --ai-purple: #2c80ff;
    --ai-purple-dark: #1a5fcc;
    --ai-purple-light: #eaf2ff;
    --ai-bg: #f0f7ff;
    --ai-card: #ffffff;
    --ai-border: #e5e7eb;
    --ai-text: #1f2937;
    --ai-muted: #6b7280;
    --ai-gradient: linear-gradient(135deg, var(--primary), #1a5fd4);
}
* { box-sizing: border-box; }

/* 与全站 .container / 计算器对齐：不覆盖全局 body、不手动加 header/footer 外边距，
   统一由 --module-gap 旋钮承载模块间距 */
.design-wrap {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: var(--column-gap, 24px);
    align-items: start;
    margin-top: var(--module-gap) !important;
}
.card {
    background: var(--white);
    border: 1px solid var(--gray-200, var(--gray-200));
    
    box-shadow: var(--shadow, 0 4px 12px rgba(0,0,0,0.1));
    overflow: hidden;
}
.control-panel { height: fit-content; position: sticky; top: 16px; }
.panel-header {
    background: linear-gradient(135deg, var(--ai-purple) 0%, #1a5fd4 100%);
    padding: 18px 20px;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
}
.panel-icon {
    width: 40px; height: 40px;
    background: rgba(255,255,255,0.2);
    
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
}
.panel-header h2 { margin: 0; font-size: 1.05rem; font-weight: 700; }
.panel-body { padding: 18px; }

/* 模式切换 */
.mode-tabs {
    display: flex;
    background: var(--ai-bg);
    
    padding: 4px;
    margin-bottom: 16px;
    gap: 4px;
}
.mode-tab {
    flex: 1;
    padding: 8px;
    border: none;
    background: transparent;
    
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--ai-muted);
    font-weight: 500;
    transition: all .2s;
}
.mode-tab.active {
    background: white;
    color: var(--ai-purple);
    box-shadow: 0 1px 6px rgba(0,0,0,0.1);
}

/* 表单 */
.form-group { margin-bottom: 14px; }
.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ai-text);
    margin-bottom: 7px;
}
.form-label .tip { font-weight: 400; color: var(--ai-muted); font-size: 0.78rem; }
.required { color: var(--danger); margin-left: 2px; }
.form-select {
    width: 100%;
    padding: 9px 12px;
    border: 1.5px solid var(--ai-border);
    
    font-size: 0.9rem;
    color: var(--ai-text);
    background: white;
    cursor: pointer;
    transition: border-color .2s;
}
.form-select:focus { outline: none; border-color: var(--ai-purple); }
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--ai-border);
    
    font-size: 0.88rem;
    color: var(--ai-text);
    resize: vertical;
    min-height: 90px;
    font-family: inherit;
    transition: border-color .2s;
}
.form-textarea:focus { outline: none; border-color: var(--ai-purple); }

/* 风格选择网格 */
.style-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 7px;
    margin-bottom: 4px;
}
.style-chip {
    padding: 8px 4px;
    border: 1.5px solid var(--ai-border);
    
    text-align: center;
    cursor: pointer;
    font-size: 0.78rem;
    color: var(--ai-text);
    transition: all .18s;
    background: white;
}
.style-chip:hover { border-color: var(--ai-purple); color: var(--ai-purple); }
.style-chip.selected {
    border-color: var(--ai-purple);
    background: var(--ai-purple-light);
    color: var(--ai-purple);
    font-weight: 600;
}
.style-emoji { display: block; font-size: 1.3rem; margin-bottom: 2px; }

/* 快捷标签 */
.prompt-examples { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.example-tag {
    padding: 4px 10px;
    background: var(--ai-purple-light);
    color: var(--ai-purple);
    
    font-size: 0.78rem;
    cursor: pointer;
    transition: background .15s;
}
.example-tag:hover { background: #cfe0ff; }

/* 上传区 */
.upload-zone {
    border: 2px dashed var(--ai-border);
    
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    color: var(--ai-muted);
    font-size: 0.85rem;
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--ai-purple);
    background: var(--ai-purple-light);
    color: var(--ai-purple);
}
.upload-zone .upload-icon { font-size: 2rem; margin-bottom: 8px; }
.upload-preview { max-width: 100%; max-height: 150px;  margin-top: 8px; }

/* 按钮 */
.btn-generate {
    width: 100%;
    min-height: 44px;
    padding: 12px 16px;
    background: var(--ai-gradient);
    color: white;
    border: none;
    
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 4px;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    transition: all 0.25s;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}
.btn-generate:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124,58,237,0.35);
}
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }
.btn-random {
    width: 100%;
    padding: 9px;
    background: white;
    color: var(--ai-purple);
    border: 1.5px solid var(--ai-purple);
    
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: background .15s;
}
.btn-random:hover { background: var(--ai-purple-light); }

/* ======= 右侧结果面板 ======= */
.result-panel { min-height: 580px; display: flex; flex-direction: column; }
.result-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--ai-border);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--ai-text);
}
.result-header i { color: var(--ai-purple); }
.result-body { flex: 1; display: flex; flex-direction: column; padding: 20px; }

/* 空状态 */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--ai-muted);
    text-align: center;
    padding: 40px 20px;
}
.empty-state .empty-icon { font-size: 3.5rem; margin-bottom: 16px; opacity: 0.35; }
.empty-state h3 { font-size: 1.1rem; color: #374151; margin-bottom: 8px; }
.empty-state p { font-size: 0.88rem; margin-bottom: 24px; }
.features-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    width: 100%;
    max-width: 480px;
}
.feature-item {
    background: var(--ai-bg);
    
    padding: 14px 10px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--ai-muted);
}
.feature-item i { font-size: 1.4rem; color: var(--ai-purple); margin-bottom: 6px; display: block; }

/* 生成中状态 */
.generating-state { display: none; flex: 1; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.spinner-ring {
    width: 70px; height: 70px;
    border: 4px solid var(--ai-purple-light);
    border-top-color: var(--ai-purple);
    
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.gen-progress-bar {
    width: 100%; max-width: 320px;
    height: 6px;
    background: var(--ai-border);
    
    overflow: hidden;
    margin: 16px 0;
}
.gen-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--ai-purple), #1a5fd4, var(--ai-purple));
    background-size: 200%;
    
    width: 10%;
    transition: width .5s ease;
    animation: shimmer 2s linear infinite;
}
@keyframes shimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }
.gen-steps { margin-top: 16px; text-align: left; width: 100%; max-width: 280px; }
.gen-step {
    display: flex; align-items: center; gap: 10px;
    padding: 7px 0;
    font-size: 0.85rem;
    color: #9ca3af;
    transition: color .3s;
}
.gen-step.active { color: var(--ai-purple); font-weight: 600; }
.gen-step.done { color: var(--success); }
.step-dot {
    width: 22px; height: 22px;
    
    background: var(--ai-border);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: background .3s, color .3s;
}
.gen-step.active .step-dot { background: var(--ai-purple); color: white; }
.gen-step.done .step-dot { background: var(--success); color: white; }

/* 错误状态 */
.error-state {
    display: none;
    flex: 1; flex-direction: column;
    align-items: center; justify-content: center;
    text-align: center; padding: 30px;
}
.error-icon { font-size: 3rem; color: var(--danger); margin-bottom: 12px; }
.error-state h3 { color: var(--danger); font-size: 1.1rem; margin-bottom: 8px; }
.error-state p { color: var(--ai-muted); font-size: 0.85rem; }

/* 结果图片 */
.result-img-wrap {
    display: none;
    position: relative;
    
    overflow: hidden;
    background: #f3f4f6;
}
.result-img {
    width: 100%;
    display: block;
    
}
.result-img-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.55));
    color: white;
    padding: 24px 14px 12px;
    font-size: 0.82rem;
}
.result-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 5px; }
.result-tag {
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(4px);
    
    padding: 2px 10px;
    font-size: 0.75rem;
}
.result-tip {
    font-size: 0.8rem;
    color: var(--ai-muted);
    text-align: center;
    margin-top: 10px;
    display: none;
}

/* 操作按钮 */
.result-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
    flex-wrap: wrap;
}

/* AI 视觉模型对上传图的描述（img2img 模式显示） */
.vision-summary {
    background: linear-gradient(135deg, rgba(124,58,237,0.06) 0%, rgba(168,85,247,0.04) 100%);
    border: 1px solid rgba(124,58,237,0.18);
    
    padding: 12px 14px;
    margin-top: 14px;
    font-size: 0.85rem;
    color: var(--ai-text);
}
.vision-summary-head {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    color: var(--ai-purple);
    margin-bottom: 6px;
    font-size: 0.82rem;
}
.vision-summary-head i { font-size: 0.92rem; }
.vision-summary-body {
    color: var(--ai-muted);
    line-height: 1.55;
    word-break: break-word;
}
.btn-action {
    flex: 1;
    padding: 9px 8px;
    border: none;
    
    font-size: 0.84rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
    min-width: 80px;
}
.btn-view    { background: var(--primary-light); color: var(--primary); }
.btn-view:hover { background: var(--primary-light); }
.btn-dl      { background: var(--success-50); color: #166534; }
.btn-dl:hover { background: #bbf7d0; }
.btn-regen   { background: var(--ai-purple-light); color: var(--ai-purple); }
.btn-regen:hover { background: #cfe0ff; }

/* 历史记录 */
.history-section { margin-top: 20px; }
.history-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ai-muted);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.history-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.history-item {
    
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 16/9;
    background: var(--ai-bg);
    transition: transform .15s;
}
.history-item:hover { transform: scale(1.03); }
.history-item img { width: 100%; height: 100%; object-fit: cover; }

/* Toast */
.toast {
    position: fixed;
    top: 20px; left: 50%; transform: translateX(-50%) translateY(-80px);
    background: #1f2937; color: white;
    padding: 10px 20px;
    
    font-size: 0.88rem;
    z-index: 9000;
    transition: transform .3s cubic-bezier(.34,1.56,.64,1), opacity .3s;
    display: flex; align-items: center; gap: 8px;
    white-space: nowrap;
    opacity: 0;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.success { background: var(--success); }
.toast.error   { background: var(--danger); }
.toast.info    { background: var(--ai-purple); }

/* ===== 响应式 ===== */

/* 大屏电脑（≥1200px）：左侧面板稍宽 */
@media (min-width: 1200px) {
    .design-wrap { grid-template-columns: 400px 1fr; gap: 24px; }
    .result-panel { min-height: 620px; }
}

/* 中等屏幕（900px~1199px）：左侧稍窄 */
@media (max-width: 1199px) and (min-width: 901px) {
    .design-wrap { grid-template-columns: 320px 1fr; gap: 16px; }
}

/* 平板及以下（≤900px）：单列排列，控制面板在上 */
@media (max-width: 900px) {
    .design-wrap {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 12px 0 30px;
    }
    .control-panel { position: static; width: 100%; }
    .result-panel { min-height: 400px; }
    .features-row { grid-template-columns: 1fr 1fr; }
    .history-grid { grid-template-columns: repeat(3, 1fr); }
    .style-grid { grid-template-columns: repeat(4, 1fr); }
}

/* 手机（≤600px）：紧凑模式 */
@media (max-width: 600px) {
    .design-wrap { gap: 12px; padding: 8px 0 24px; }
    .panel-header { padding: 14px 16px; }
    .panel-body { padding: 14px; }
    .style-grid { grid-template-columns: repeat(3, 1fr); gap: 5px; }
    .style-chip { padding: 7px 3px; font-size: 0.73rem; }
    .style-emoji { font-size: 1.1rem; }
    .features-row { grid-template-columns: 1fr; }
    .result-actions { flex-wrap: nowrap; }
    .result-actions .btn-action span { display: none; }
    .result-actions .btn-action { padding: 9px 6px; min-width: 0; flex: 1; }
    .history-grid { grid-template-columns: repeat(2, 1fr); }
    .result-body { padding: 14px; }
    .result-header { padding: 12px 16px; }
    .btn-generate { padding: 12px; font-size: 0.95rem; }
    .form-group { margin-bottom: 12px; }
}

/* 超小屏（≤380px）*/
@media (max-width: 380px) {
    .style-grid { grid-template-columns: repeat(3, 1fr); gap: 4px; }
    .panel-header h2 { font-size: 0.95rem; }
    .result-actions .btn-action i { margin: 0; }
}