* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 14px;
    color: #333;
    background: #F8F7F4;
    overflow: hidden;
}

.app { display: flex; flex-direction: column; height: 100vh; }

.header {
    display: flex; align-items: center; justify-content: space-between;
    height: 56px; padding: 0 20px; background: #fff;
    border-bottom: 1px solid #EBE8E0; flex-shrink: 0;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 24px; }
.logo-text { font-size: 18px; font-weight: 600; color: #222; }
.logo-sub { font-size: 12px; color: #999; margin-left: 4px; }

.main { display: flex; flex: 1; overflow: hidden; }

.sidebar { width: 280px; flex-shrink: 0; overflow-y: auto; padding: 12px; background: #F8F7F4; }
.sidebar.left { border-right: 1px solid #EBE8E0; }
.sidebar.right { border-left: 1px solid #EBE8E0; padding: 0; }

.panel {
    background: #fff; border-radius: 10px; padding: 14px;
    margin-bottom: 12px; border: 1px solid #EBE8E0;
}

.panel-title {
    display: flex; align-items: center; justify-content: space-between;
    font-size: 13px; font-weight: 600; color: #444; margin-bottom: 12px;
}

.drop-zone {
    border: 2px dashed #D4D0C6; border-radius: 8px; padding: 24px 12px;
    text-align: center; cursor: pointer; transition: all 0.2s;
    background: #FAFAF7; margin-bottom: 12px;
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: #8B7355; background: #FFF9F0;
}

.drop-icon { font-size: 32px; margin-bottom: 8px; }
.drop-text { font-size: 13px; color: #555; margin-bottom: 4px; }
.drop-sub { font-size: 11px; color: #999; }

.image-list { max-height: 300px; overflow-y: auto; }
.image-list .empty-hint { text-align: center; color: #bbb; font-size: 12px; padding: 20px 0; }

.image-item {
    display: flex; align-items: center; gap: 8px; padding: 6px;
    border-radius: 6px; margin-bottom: 4px; cursor: grab; transition: background 0.15s;
}

.image-item:hover { background: #F5F2EB; }
.image-item.dragging { opacity: 0.4; }
.image-item .thumb { width: 36px; height: 36px; border-radius: 4px; object-fit: cover; flex-shrink: 0; background: #eee; }
.image-item .info { flex: 1; min-width: 0; }
.image-item .info .name { font-size: 12px; color: #333; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.image-item .info .meta { font-size: 10px; color: #999; margin-top: 2px; }
.image-item .remove-btn { width: 20px; height: 20px; border: none; background: transparent; color: #bbb; cursor: pointer; font-size: 14px; border-radius: 3px; }
.image-item .remove-btn:hover { background: #FEE; color: #C33; }

.preview-section { flex: 1; display: flex; flex-direction: column; background: #F0EDE6; min-width: 0; }

.preview-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px; background: #fff; border-bottom: 1px solid #EBE8E0; flex-shrink: 0;
}

.toolbar-left { display: flex; align-items: center; gap: 16px; }
.template-selector, .canvas-selector { display: flex; align-items: center; gap: 8px; }
.template-selector label, .canvas-selector label { font-size: 13px; color: #666; white-space: nowrap; }
.preview-info { font-size: 12px; color: #999; }

.preview-container { flex: 1; display: flex; align-items: center; justify-content: center; padding: 20px; overflow: auto; }

.preview-placeholder { text-align: center; color: #BBB; }
.placeholder-icon { font-size: 64px; margin-bottom: 12px; opacity: 0.5; }
.placeholder-text { font-size: 14px; }

.preview-image {
    max-width: 100%; max-height: 100%; object-fit: contain;
    border-radius: 8px; box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.bottom-actions {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    padding: 14px 20px; background: #fff; border-top: 1px solid #EBE8E0; flex-shrink: 0;
}

.generate-result { padding: 0 20px 12px; font-size: 12px; color: #52C41A; text-align: center; display: none; }
.generate-result.show { display: block; }

.tabs { display: flex; background: #fff; border-bottom: 1px solid #EBE8E0; padding: 0 8px; position: sticky; top: 0; z-index: 10; }

.tab-btn {
    flex: 1; padding: 10px 4px; border: none; background: transparent;
    font-size: 12px; color: #888; cursor: pointer; border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

.tab-btn.active { color: #8B6914; border-bottom-color: #D4B106; font-weight: 500; }

.tab-content { display: none; padding: 12px; overflow-y: auto; max-height: calc(100vh - 56px - 40px); }
.tab-content.active { display: block; }

.form-row { margin-bottom: 12px; }
.form-row:last-child { margin-bottom: 0; }
.form-row label { display: block; font-size: 12px; color: #666; margin-bottom: 6px; }

.form-row input[type="text"], .form-row input[type="number"], .form-row select {
    width: 100%; padding: 7px 10px; border: 1px solid #E5E2D8; border-radius: 6px;
    font-size: 13px; background: #fff; outline: none; transition: border-color 0.15s;
}

.form-row input[type="text"]:focus, .form-row input[type="number"]:focus, .form-row select:focus { border-color: #D4B106; }
.form-row input[type="range"] { width: calc(100% - 50px); vertical-align: middle; }
.form-row input[type="color"] { width: 40px; height: 30px; border: 1px solid #E5E2D8; border-radius: 4px; cursor: pointer; padding: 2px; background: #fff; }

.range-val { display: inline-block; width: 46px; text-align: right; font-size: 12px; color: #888; vertical-align: middle; }

.color-picker-wrap { display: flex; gap: 8px; align-items: center; }
.color-hex { flex: 1; padding: 6px 8px; border: 1px solid #E5E2D8; border-radius: 5px; font-size: 12px; font-family: monospace; }

.bg-presets { display: flex; gap: 6px; flex-wrap: wrap; }
.bg-preset {
    padding: 6px 12px; border: 1px solid #E5E2D8; border-radius: 6px;
    font-size: 11px; cursor: pointer; transition: all 0.15s;
}
.bg-preset:hover { border-color: #D4B106; }
.bg-preset.active { border-color: #D4B106; box-shadow: 0 0 0 2px rgba(212,177,6,0.2); }

.switch-row { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.switch-row input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }
.switch-row span { font-size: 13px; color: #444; }

.form-row-half { display: flex; gap: 8px; }
.form-row-half > div { flex: 1; }

.btn {
    padding: 7px 16px; border: 1px solid #E5E2D8; border-radius: 6px; background: #fff;
    font-size: 13px; color: #444; cursor: pointer; transition: all 0.15s; white-space: nowrap;
}

.btn:hover:not(:disabled) { border-color: #D4D0C6; background: #FAFAF7; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary { background: linear-gradient(135deg, #D4B106 0%, #B8960A 100%); color: #fff; border-color: transparent; font-weight: 500; }
.btn-primary:hover:not(:disabled) { background: linear-gradient(135deg, #E0BC0C 0%, #C4A00B 100%); }
.btn-large { padding: 10px 28px; font-size: 14px; }
.btn-xs { padding: 3px 8px; font-size: 11px; }
.btn-ghost { background: transparent; border-color: transparent; color: #666; }
.btn-ghost:hover:not(:disabled) { background: #F5F2EB; }

.toast {
    position: fixed; top: 24px; left: 50%; transform: translateX(-50%) translateY(-20px);
    padding: 10px 20px; background: rgba(0,0,0,0.8); color: #fff; border-radius: 8px;
    font-size: 13px; opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 9999;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: rgba(82, 196, 26, 0.9); }
.toast.error { background: rgba(255, 77, 79, 0.9); }

#templateSelect { max-width: 200px; }
#canvasPreset { max-width: 140px; }

.template-group { margin-bottom: 8px; }
.template-group-label { font-size: 10px; color: #999; text-transform: uppercase; letter-spacing: 1px; padding: 4px 8px; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #D4D0C6; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #B8B4A8; }