/* 繼承 Poloo 宇宙基礎變數 */
:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #10b981;
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --bg-dark: #09090b;
    
    --glass-bg: rgba(20, 20, 25, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 20px;
    
    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.1);
}

/* === 佈局 === */
.lab-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 20px;
    padding-bottom: 40px;
    max-width: 1200px;
}

@media (min-width: 1024px) {
    .lab-container {
        grid-template-columns: 350px 1fr; /* 左側固定寬度，右側自適應 */
        align-items: start;
    }
}

/* === 左側控制台 === */
.control-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 24px;
}

.panel-header { margin-bottom: 20px; border-bottom: 1px solid var(--glass-border); padding-bottom: 16px; }
.panel-header h2 { font-size: 1.4rem; font-weight: 700; color: var(--text-main); }
.panel-header p { color: var(--text-muted); font-size: 0.9rem; }

/* 上傳區 Dropzone */
.upload-zone {
    border: 2px dashed var(--input-border);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.02);
    padding: 32px 16px;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
    position: relative;
    overflow: hidden;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.upload-icon { font-size: 48px; color: var(--text-muted); margin-bottom: 8px; transition: 0.3s; }
.upload-zone:hover .upload-icon { color: var(--primary); transform: scale(1.1); }
.upload-text { font-size: 0.9rem; color: var(--text-muted); }
.file-name { margin-top: 12px; font-weight: 600; color: var(--primary); font-size: 0.95rem; word-break: break-all; }

/* 設定群組 */
.setting-group { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--glass-border); }
.group-label { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text-main); margin-bottom: 12px; }
.sub-label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; display: flex; justify-content: space-between; }
.value-tag { color: var(--primary); font-weight: 600; }

/* 輸入元件 */
.modern-input, .modern-select {
    width: 100%; background: var(--input-bg); border: 1px solid var(--input-border);
    border-radius: 8px; padding: 10px 12px; color: white; outline: none; transition: 0.2s;
}
.modern-input:focus, .modern-select:focus { border-color: var(--primary); }

.select-wrapper { position: relative; }
.modern-select { appearance: none; cursor: pointer; }
.arrow-icon { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--text-muted); }
.modern-select option { background: #1f1f22; }

/* Segmented Control */
.segmented-control {
    display: flex; background: var(--input-bg); padding: 4px; border-radius: 10px; margin-bottom: 12px;
}
.segmented-control input { display: none; }
.segmented-control label {
    flex: 1; text-align: center; padding: 8px; border-radius: 6px;
    cursor: pointer; font-size: 0.85rem; color: var(--text-muted); transition: 0.2s;
}
.segmented-control input:checked + label { background: var(--primary); color: white; font-weight: 600; }

.page-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; display: block; text-align: right; }

/* 顏色選擇器 */
.color-input-group { display: flex; gap: 8px; align-items: center; }
input[type="color"] {
    width: 40px; height: 40px; border: none; border-radius: 8px; cursor: pointer; padding: 0; background: none;
}
.modern-input.sm { width: 100px; text-align: center; }

/* 滑桿 */
.modern-range { -webkit-appearance: none; width: 100%; background: transparent; }
.modern-range::-webkit-slider-runnable-track { height: 4px; background: rgba(255,255,255,0.1); border-radius: 2px; }
.modern-range::-webkit-slider-thumb {
    -webkit-appearance: none; height: 16px; width: 16px; border-radius: 50%; background: var(--primary);
    margin-top: -6px; cursor: pointer; transition: transform 0.1s;
}
.range-display { display: flex; align-items: center; gap: 10px; }
.range-display span { font-size: 0.85rem; color: var(--text-muted); min-width: 32px; }

/* 按鈕 */
.action-area { margin-top: 32px; }
.btn-action {
    width: 100%; padding: 14px; border: none; border-radius: 12px;
    font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: 0.2s; font-size: 1rem;
}
.btn-action:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-action.primary { background: var(--primary); color: white; }
.btn-action.primary:hover:not(:disabled) { background: var(--primary-hover); transform: translateY(-2px); }
.btn-action.secondary { background: rgba(255,255,255,0.08); color: white; }
.btn-action.secondary:hover:not(:disabled) { background: rgba(255,255,255,0.15); }
.btn-action.sm { padding: 8px 16px; width: auto; font-size: 0.9rem; }

/* 進度條 */
.progress-container { margin-top: 16px; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--secondary); width: 0%; transition: width 0.3s; }
#progressText { text-align: center; font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

/* === 右側預覽區 === */
.preview-panel {
    background: rgba(0, 0, 0, 0.2); border-radius: 24px; padding: 24px;
    border: 1px solid rgba(255,255,255,0.05); min-height: 600px;
}

.preview-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px;
    padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,0.05);
}
.ph-left { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text-muted); }

/* 圖片網格 */
.preview-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px;
}

.preview-item {
    background: white; border-radius: 12px; overflow: hidden; position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2); transition: transform 0.2s;
    border: 4px solid #222; /* 模擬相框 */
}
.preview-item:hover { transform: translateY(-4px); z-index: 2; }

.preview-img-wrapper {
    width: 100%; height: 200px; display: flex; align-items: center; justify-content: center;
    background: repeating-conic-gradient(#eee 0% 25%, white 0% 50%) 50% / 20px 20px; /* 透明背景格 */
    overflow: hidden;
}
.preview-item img { max-width: 100%; max-height: 100%; object-fit: contain; }

.preview-info {
    padding: 10px; background: #222; color: white; font-size: 0.8rem;
    display: flex; justify-content: space-between; align-items: center;
}
.preview-download {
    background: var(--primary); width: 28px; height: 28px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center; color: white; cursor: pointer;
}
.preview-download:hover { background: var(--primary-hover); }

/* 空狀態 */
.empty-state {
    grid-column: 1 / -1; text-align: center; color: var(--text-muted); padding-top: 100px;
}
.empty-state i { font-size: 4rem; opacity: 0.3; margin-bottom: 16px; display: block; }

/* 輔助 */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mt-3 { margin-top: 12px; }

/* Navbar & Footer (簡化版) */
.nav-center { font-weight: 700; display: flex; align-items: center; gap: 8px; font-size: 1.1rem; }
.footer-simple { text-align: center; padding: 40px 0; color: var(--text-muted); font-size: 0.85rem; }