/* 全局样式 */
:root {
    --bg-color: #282c34;
    --primary-text-color: #abb2bf;
    --highlight-color: #61afef; /* Blue for Play */
    --stop-color: #e06c75;
    /* Red for Stop */
    --container-bg-color: #3a404a;
    --button-text-color: #ffffff;
    --history-bg-color: #2c313a;
    --history-item-hover-bg-color: #3a404a;
    --favorite-color: #e5c07b;
    --delete-color: #e06c75;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    width: 100%;
    max-width: 1300px;
    background-color: var(--container-bg-color);
    border-radius: 8px;
    padding: 15px 25px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

header {
    text-align: center;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

header h1 {
    margin: 0;
    color: var(--highlight-color);
}

header p {
    margin: 5px 0 0;
    font-size: 0.9em;
}

.core-functions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.function-button {
    flex-grow: 1;
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    border: 1px solid var(--primary-text-color);
    border-radius: 5px;
    padding: 8px 12px;
    font-size: 0.85em;
    cursor: pointer;
    transition: all 0.2s ease;
}

.function-button:hover {
    background-color: var(--highlight-color);
    color: var(--button-text-color);
    border-color: var(--highlight-color);
}

/* ==================== 布局修改 ==================== */
.main-content {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.main-panels-container {
    display: flex;
    gap: 20px;
    flex-grow: 1;
    min-width: 0;
}
/* ================================================== */

.controls-panel {
    flex-grow: 1;
    min-width: 0;
}

.history-panel {
    flex-shrink: 0;
    width: 200px;
    background-color: var(--history-bg-color);
    border-radius: 5px;
    padding: 10px;
    border: 1px solid var(--bg-color);
}

.history-header {
    padding: 0 5px;
    border-bottom: 1px solid var(--container-bg-color);
    margin-bottom: 5px;
}

.history-header h2 {
    margin-top: 0;
    text-align: center;
    font-size: 1.1em;
    margin-bottom: 10px;
}

.history-filter {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.8em;
    margin-bottom: 10px;
}

#historyList {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 520px;
    overflow-y: auto;
}

#historyList li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 5px;
    font-size: 0.8em;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

#historyList li:hover {
    background-color: var(--history-item-hover-bg-color);
}

.history-item-main {
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
    min-width: 0;
}

.history-item-actions {
    display: flex;
    gap: 8px;
    padding-left: 5px;
}

.history-btn {
    cursor: pointer;
    font-size: 1.2em;
    line-height: 1;
    transition: color 0.2s ease;
}

.favorite-btn.favorited {
    color: var(--favorite-color);
}

.delete-btn:hover {
    color: var(--delete-color);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px 20px;
}

.controls-group {
    border: 1px solid var(--bg-color);
    border-radius: 6px;
    padding: 5px 15px 10px 15px;
    margin-bottom: 0;
    min-height: 120px;
}

.param-slider {
    display: block;
    margin-bottom: 8px;
}

.param-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    gap: 8px;
    height: 1.1em;
}

.param-slider label {
    width: auto;
    font-size: 0.8em;
    font-weight: bold;
    flex-shrink: 0;
}

.param-slider span {
    width: auto;
    font-family: monospace;
    font-size: 0.8em;
    color: var(--highlight-color);
}

.param-slider input[type="range"],
.param-slider select {
    width: 100%;
    margin: 0;
}

.param-slider select {
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    border: 1px solid var(--primary-text-color);
    border-radius: 4px;
    padding: 5px;
    width: 100%;
    font-size: 0.9em;
}

.player-controls {
    grid-column: 1 / -1;
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.player-controls button {
    border: none;
    border-radius: 5px;
    padding: 12px 30px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-grow: 1;
}

#playButton {
    background-color: var(--highlight-color);
    color: var(--button-text-color);
}

#playButton:hover {
    background-color: #529bde;
}

#stopButton {
    background-color: var(--stop-color);
    color: var(--button-text-color);
}

#stopButton:hover {
    background-color: #c95d66;
}

.player-controls button:active {
    transform: scale(0.99);
}

.player-controls button:disabled {
    background-color: #4a4f58;
    cursor: not-allowed;
}

.lock-icon {
    cursor: pointer;
    user-select: none;
}

.lock-icon.locked {
    color: var(--highlight-color);
}

/* ==================== 新增预设面板样式 ================== */
.presets-panel {
    flex-shrink: 0;
    width: 150px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preset-button {
    width: 100%;
    background-color: var(--history-bg-color);
    color: var(--primary-text-color);
    border: 1px solid var(--bg-color);
    border-radius: 5px;
    padding: 10px;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.preset-button:hover {
    background-color: var(--highlight-color);
    color: var(--button-text-color);
    border-color: var(--highlight-color);
}
/* ======================================================= */