.noise-panel {
    max-width: 580px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 32px
}

.noise-visual {
    margin-bottom: 28px
}

#noiseCanvas {
    width: 100%;
    height: 150px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: block
}

.noise-type-select {
    display: flex;
    gap: 12px;
    margin-bottom: 28px
}

.noise-btn {
    flex: 1;
    padding: 16px 12px;
    border-radius: var(--radius);
    background: var(--bg);
    border: 2px solid var(--border);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px
}

.noise-btn:hover {
    border-color: var(--primary-light)
}

.noise-btn.active {
    border-color: var(--primary);
    background: color-mix(in srgb, var(--primary) 6%, transparent)
}

.noise-btn.active[data-type="white"] {
    border-color: #95a5a6
}

.noise-btn.active[data-type="pink"] {
    border-color: #e84393
}

.noise-btn.active[data-type="brown"] {
    border-color: #8B4513
}

.noise-icon {
    font-size: 1.4rem;
    line-height: 1
}

.noise-btn[data-type="white"] .noise-icon {
    color: #95a5a6
}

.noise-btn[data-type="pink"] .noise-icon {
    color: #e84393
}

.noise-btn[data-type="brown"] .noise-icon {
    color: #8B4513
}

.noise-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text)
}

.noise-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.3
}

.noise-controls {
    margin-bottom: 24px;
    text-align: left
}

.timer-section {
    margin-bottom: 28px;
    text-align: left
}

.timer-section>label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px
}

.timer-btns {
    display: flex;
    gap: 8px;
    margin-bottom: 8px
}

.timer-btn {
    padding: 8px 18px;
    border-radius: 20px;
    background: var(--bg);
    border: 1.5px solid var(--border);
    color: var(--text-light);
    font-size: 0.82rem;
    font-weight: 600;
    transition: var(--transition)
}

.timer-btn:hover,
.timer-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary)
}

.timer-display {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
    min-height: 1.4em
}

.play-btn {
    width: 100%;
    padding: 16px;
    border-radius: var(--radius);
    background: var(--primary);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition)
}

.play-btn:hover {
    background: var(--primary-dark)
}

.play-btn.playing {
    background: #e74c3c
}

.play-btn.playing:hover {
    background: #c0392b
}

.tutorial-link-box {
    max-width: 580px;
    margin: 20px auto 0;
    text-align: center;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border)
}

.tutorial-link-box a {
    font-weight: 600;
    font-size: 0.92rem
}

@media(max-width:768px) {
    .noise-panel {
        padding: 28px 18px
    }

    .noise-type-select {
        flex-direction: column
    }

    .timer-btns {
        flex-wrap: wrap
    }
}