/* ========== 基础重置 ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #1a1a2e;
    --panel-bg: #16213e;
    --section-bg: #0f3460;
    --accent: #e94560;
    --accent-hover: #ff6b81;
    --success: #2ecc71;
    --text: #e0e0e0;
    --text-muted: #8899aa;
    --border: #2a3a5c;
    --radius: 6px;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========== 顶部工具栏 ========== */
#toolbar {
    background: var(--panel-bg);
    padding: 10px 24px;
    display: flex;
    align-items: baseline;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 10;
    flex-shrink: 0;
}

#toolbar h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
}

#toolbar .subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

/* ========== 主体布局 ========== */
#main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ========== 左侧控制面板 ========== */
#control-panel {
    width: 340px;
    min-width: 340px;
    background: var(--panel-bg);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.panel-section {
    background: var(--section-bg);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 10px;
}

.panel-section h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

.input-group {
    margin-bottom: 10px;
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.input-group input[type="number"],
.input-group input[type="file"],
.input-group select {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s;
}

.input-group input:focus,
.input-group select:focus {
    border-color: var(--accent);
}

.input-group input[type="range"] {
    width: calc(100% - 52px);
    vertical-align: middle;
    accent-color: var(--accent);
}

.input-group span {
    display: inline-block;
    width: 44px;
    font-size: 12px;
    color: var(--text);
    text-align: right;
    vertical-align: middle;
}

.input-group input[type="file"] {
    font-size: 12px;
    cursor: pointer;
}

/* ========== 按钮 ========== */
.actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 4px;
}

.btn {
    padding: 10px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: #fff;
}

.btn.primary {
    background: var(--accent);
}

.btn.primary:hover {
    background: var(--accent-hover);
}

.btn.success {
    background: var(--success);
}

.btn.success:hover {
    opacity: 0.85;
}

.btn {
    background: #2a3a5c;
}

.btn:hover {
    background: #3a4f7a;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.actions-row {
    display: flex;
    gap: 8px;
}

.actions-row .btn {
    flex: 1;
}

/* ========== 状态信息 ========== */
#status-info p {
    font-size: 12px;
    margin-bottom: 4px;
    display: flex;
    justify-content: space-between;
}

.status-pending { color: #f39c12; }
.status-ok     { color: #2ecc71; }
.status-error  { color: #e94560; }

/* ========== 右侧预览区 ========== */
#preview-area {
    flex: 1;
    display: flex;
    background: #0a0a14;
    overflow: hidden;
}

.preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* 原始图占 35%，映射结果占 65% */
#preview-src {
    flex: 0 0 35%;
}

#preview-dst {
    flex: 1;
}

.preview-label {
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 8px 0;
    background: rgba(0,0,0,0.3);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.preview-inner {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.preview-inner img,
.preview-inner canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.preview-inner canvas {
    display: block;
}

.preview-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
    pointer-events: none;
}

.preview-placeholder p {
    padding: 16px 28px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
}

.preview-divider {
    width: 2px;
    background: var(--border);
    flex-shrink: 0;
}

/* ========== 滚动条 ========== */
#control-panel::-webkit-scrollbar {
    width: 6px;
}

#control-panel::-webkit-scrollbar-track {
    background: transparent;
}

#control-panel::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ========== 调试面板 ========== */
#debug-panel {
    height: 180px;
    flex-shrink: 0;
    background: #0d1117;
    border-top: 1px solid var(--border);
    font-family: 'Cascadia Code', 'Consolas', 'Courier New', monospace;
    font-size: 11px;
    display: flex;
    flex-direction: column;
    transition: height 0.2s;
}

#debug-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    background: #161b22;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    font-size: 11px;
    color: var(--text-muted);
}

#debug-header span {
    flex: 1;
}

#debug-header button {
    background: #21262d;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 3px;
    cursor: pointer;
}

#debug-header button:hover {
    background: #30363d;
}

#debug-output {
    flex: 1;
    overflow-y: auto;
    padding: 4px 12px;
    line-height: 1.5;
}

.debug-log   { color: #7ee787; }
.debug-warn  { color: #d29922; }
.debug-error { color: #f85149; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    #main-container {
        flex-direction: column;
    }
    #control-panel {
        width: 100%;
        min-width: 100%;
        max-height: 45vh;
    }
}