/* led-barrage —— LED 全屏弹幕业务样式 */

.lb-card {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
}
.lb-title {
    font-size: 16px;
    font-weight: 800;
    margin-bottom: 18px;
}

.lb-field { margin-bottom: 14px; }
.lb-field > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--c-text-sub);
    margin-bottom: 7px;
}
.lb-field-full { grid-column: 1 / -1; }

.lb-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 20px;
}

textarea#lbText,
.lb-field textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 12px;
    outline: none;
    resize: vertical;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
textarea#lbText:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-soft);
}

/* 颜色选择 */
.lb-colors {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}
.lb-color {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    padding: 0;
    transition: all 0.12s ease;
}
.lb-color:hover { transform: scale(1.1); }
.lb-color.active {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--c-primary) 30%, transparent);
}
.lb-c-red    { background: #ff4d4f; }
.lb-c-yellow { background: #ffd700; }
.lb-c-green  { background: #00ff88; }
.lb-c-blue   { background: #4da6ff; }
.lb-c-purple { background: #cc66ff; }
.lb-c-white  { background: #ffffff; }
.lb-color-custom {
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 2px dashed var(--c-border);
    overflow: hidden;
    cursor: pointer;
    padding: 0;
}

/* 滑块 */
.lb-slider-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.lb-range {
    flex: 1;
    height: 6px;
    accent-color: var(--c-primary);
    cursor: pointer;
}
.lb-range-val {
    min-width: 55px;
    font-weight: 800;
    color: var(--c-primary);
    font-size: 14px;
    text-align: right;
}

/* 方向按钮 */
.lb-dir-btns {
    display: flex;
    gap: 6px;
}
.lb-dir {
    padding: 7px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--c-text);
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.12s ease;
}
.lb-dir.active {
    border-color: var(--c-primary);
    color: var(--c-primary);
}

/* 选项 */
.lb-options {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    padding: 14px 16px;
    background: var(--c-surface-soft);
    border-radius: 10px;
}
.lb-option {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text);
    cursor: pointer;
}
.lb-option input[type="checkbox"] {
    accent-color: var(--c-primary);
    cursor: pointer;
}

/* 按钮 */
.lb-btns {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.lb-btn {
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}
.lb-btn-primary {
    background: var(--c-primary);
    color: #fff;
}
.lb-btn-primary:hover { opacity: 0.9; }
.lb-btn-ghost {
    background: transparent;
    color: var(--c-text-sub);
    border-color: var(--c-border);
}
.lb-btn-ghost:hover { color: var(--c-text); border-color: var(--c-primary); }

.lb-note {
    font-size: 12px;
    color: var(--c-text-sub);
    line-height: 1.6;
    margin: 0;
}

/* 预览 */
.lb-preview {
    height: 120px;
    background: #111;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    border: 2px solid #333;
}
.lb-preview-text {
    font-size: 40px;
    font-weight: 900;
    color: #ffd700;
    white-space: nowrap;
    animation: lbScrollPreview 7s linear infinite;
    text-shadow: 0 0 20px currentColor;
    padding: 0 20px;
}
@keyframes lbScrollPreview {
    from { transform: translateX(200px); }
    to   { transform: translateX(-100%); }
}

/* 预设 */
.lb-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.lb-preset {
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.12s ease;
}
.lb-preset:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
    transform: translateY(-1px);
}

/* 全屏层 */
.lb-fullscreen {
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 9999;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.lb-fullscreen[hidden] { display: none; }
.lb-fs-bar {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.lb-fs-item {
    font-weight: 900;
    white-space: nowrap;
    pointer-events: none;
    animation-name: lbScrollFull;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}
@keyframes lbScrollFullLeft {
    from { transform: translateX(100vw); }
    to   { transform: translateX(-100%); }
}
@keyframes lbScrollFullRight {
    from { transform: translateX(-100%); }
    to   { transform: translateX(100vw); }
}

/* 彩虹渐变 */
.lb-fs-item.lb-rainbow {
    background: linear-gradient(90deg, #ff0000, #ff7f00, #ffff00, #00ff00, #0000ff, #4b0082, #9400d3);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: lbScrollFullLeft linear infinite, lbRainbow 3s linear infinite;
}
@keyframes lbRainbow {
    from { background-position: 0% center; }
    to   { background-position: 200% center; }
}

/* 霓虹灯 */
.lb-fs-item.lb-glow {
    text-shadow:
        0 0 10px currentColor,
        0 0 20px currentColor,
        0 0 40px currentColor,
        0 0 80px currentColor;
}

/* 闪烁 */
.lb-fs-item.lb-flash {
    animation: lbScrollFullLeft linear infinite, lbFlash 1.5s ease-in-out infinite;
}
@keyframes lbFlash {
    0%, 80%, 100% { opacity: 1; }
    85%, 95%      { opacity: 0.1; }
}

.lb-fs-tip {
    position: fixed;
    bottom: 16px;
    right: 16px;
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    pointer-events: none;
    z-index: 10000;
}

.lb-disclaim {
    font-size: 13px;
    color: var(--c-text-sub);
    line-height: 1.8;
    padding: 14px 18px;
    background: var(--c-surface-soft);
    border: 1px solid color-mix(in srgb, var(--c-primary) 20%, transparent);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}
.lb-disclaim b { color: var(--c-text); }
.lb-info-block { margin-bottom: 24px; }

@media (max-width: 640px) {
    .lb-grid { grid-template-columns: 1fr; }
    .lb-fullscreen { font-size: 48px; }
}