* {
    touch-action: manipulation;
    box-sizing: border-box
}

:root {
    --bg: #f5f6f8;
    --card: #fff;
    --text: #222;
    --muted: #666;
    --border: #ddd;
    --accent: #4CAF50;
    --accent-hover: #43A047;
    --btn: #eceef1;
    --btn-hover: #dfe2e6;
    --radius: 8px;
    --warn: #FF9800;
    --warn-hover: #F57C00
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0 auto;
    padding: 3px;
    max-width: 640px;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column
}

h2 {
    font-size: 1.25em;
    margin: 16px 4px 12px
}

.hidden {
    display: none !important
}

.panel {
    border-radius: var(--radius);
    padding: 3px;
    margin-bottom: 12px
}

/* 音效区 */
#soundSection {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 8px
}

.sound-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 6px;
    user-select: none;
    -webkit-user-select: none
}

.sound-buttons .sound-btn {
    padding: 14px 8px;
    font-size: 16px;
    min-height: 70px;
    border: 1px solid var(--border);
    background: var(--btn);
    border-radius: var(--radius);
    cursor: pointer;
    transition: .15s;
    text-align: center;
    overflow: hidden;
    white-space: nowrap
}

.sound-buttons .sound-btn:hover {
    background: var(--btn-hover)
}

.sound-buttons .sound-btn.playing {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent)
}

.sound-buttons .sound-btn.playing:hover {
    background: var(--accent-hover)
}

.sound-buttons .sound-btn.paused {
    background: var(--warn);
    color: #fff;
    border-color: var(--warn)
}

.sound-buttons .sound-btn.selected {
    outline: 3px solid var(--warn);
    outline-offset: -3px
}

.sound-buttons .sound-btn.paused:hover {
    background: var(--warn-hover)
}

.sound-buttons p {
    margin: 0;
    color: var(--muted);
    font-size: .9em;
    grid-column: 1/-1
}

/* 窄屏：按钮更紧凑，去掉边框线 */
@media (max-width: 480px) {
    .sound-buttons {
        gap: 4px
    }
    .sound-buttons .sound-btn {
        border-color: transparent;
        padding: 14px 4px
    }
}

/* 控制区 */
#controlPanel>*:not(.hidden)+* {
    margin-top: 12px
}

#controlPanel {
    flex-shrink: 0;
    margin-top: auto
}

.help-list {
    margin: 0;
    padding-left: 20px;
    line-height: 1.8;
    font-size: 14px;
    color: var(--text)
}

.help-list li {
    margin-bottom: 4px
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center
}

.row label {
    font-weight: 600;
    min-width: 36px;
    flex-shrink: 0
}

#volumeSlider {
    flex: 1;
    min-width: 140px;
    accent-color: var(--accent)
}

#volumeValue {
    font-variant-numeric: tabular-nums;
    color: var(--muted);
    min-width: 44px;
    text-align: right
}

.btn {
    padding: 8px 14px;
    font-size: 14px;
    border: 1px solid var(--border);
    background: var(--btn);
    border-radius: var(--radius);
    cursor: pointer;
    min-height: 38px;
    transition: .15s;
    white-space: nowrap
}

.btn:hover {
    background: var(--btn-hover)
}

.select {
    padding: 6px 10px;
    font-size: 14px;
    border: 1px solid var(--border);
    background: var(--btn);
    border-radius: var(--radius);
    cursor: pointer;
    min-height: 38px;
    flex: 1;
    min-width: 140px
}

#outputRefresh {
    flex-shrink: 0;
    min-width: 38px;
    padding: 6px 10px
}

/* 远程控制弹窗 */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100
}

.modal-mask {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, .5)
}

.modal-body {
    position: relative;
    background: var(--card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .2);
    max-width: 90vw;
    width: 320px
}

.modal-close {
    position: absolute;
    top: 4px;
    right: 8px;
    background: none;
    border: none;
    font-size: 24px;
    line-height: 1;
    color: var(--muted);
    cursor: pointer;
    padding: 4px 8px
}

.modal-close:hover {
    color: var(--text)
}

.code-title {
    margin: 0 0 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--muted)
}

.code-input {
    width: 100%;
    font-size: 36px;
    letter-spacing: 12px;
    text-align: center;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-variant-numeric: tabular-nums;
    margin-bottom: 12px
}

.code-input:focus {
    outline: none;
    border-color: var(--accent)
}

.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 16px 0
}

#pairCode {
    color: var(--accent);
    cursor: pointer;
    transition: .15s
}

#pairCode:hover {
    background: var(--btn);
    border-color: var(--accent)
}

#pairCode:active {
    transform: scale(.98)
}

.code-connect-btn {
    width: 100%
}

.qr-tip {
    margin: 6px 0 0;
    font-size: 12px;
    color: var(--muted);
    text-align: center
}

/* 状态弹窗 */
.status-toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, .78);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    z-index: 200;
    box-shadow: 0 2px 10px rgba(0, 0, 0, .2);
    max-width: 90vw;
    text-align: center;
    cursor: pointer;
    animation: toast-in .2s ease
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translate(-50%, 8px)
    }

    to {
        opacity: 1;
        transform: translate(-50%, 0)
    }
}