/* 使用教程：遮罩、高亮与说明卡片 */
.tutorial-shade,
.tutorial-rings,
.tutorial-card {
    display: none;
}
body.tutorial-active .tutorial-shade,
body.tutorial-active .tutorial-rings,
body.tutorial-active .tutorial-card {
    display: block;
}

/* 遮罩填充部分拦截点击，镂空处可以操作 */
.tutorial-shade {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2500;
    pointer-events: none;
}
.tutorial-shade-fill {
    fill: rgba(15, 23, 42, 0.55);
    fill-rule: evenodd;
    pointer-events: auto;
    transition: fill-opacity 0.25s;
}
.tutorial-shade.clear .tutorial-shade-fill {
    fill-opacity: 0;
}

/* 可操作区域的高亮边框：位于教程中打开的菜单之上、说明卡片之下 */
.tutorial-rings {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2650;
    pointer-events: none;
}

/* 高亮边框：提示区域为虚线，完成后变绿 */
.tutorial-ring {
    fill: none;
    stroke: #01b0f1;
    stroke-width: 3px;
    pointer-events: none;
    animation: tutorial-ring-pulse 1.4s ease-in-out infinite;
}
.tutorial-ring.outline {
    stroke-width: 2px;
    stroke-dasharray: 6 4;
    animation: none;
}
.tutorial-shade.done .tutorial-ring,
.tutorial-rings.done .tutorial-ring {
    stroke: #35a853;
    animation: none;
}
@keyframes tutorial-ring-pulse {
    0%, 100% { stroke-opacity: 1; stroke-width: 3px; }
    50% { stroke-opacity: 0.5; stroke-width: 6px; }
}

/* 只看说明的步骤拦截全部点击 */
.tutorial-blocker {
    position: fixed;
    inset: 0;
    z-index: 2550;
    display: none;
}
body.tutorial-active .tutorial-blocker.show {
    display: block;
}

/* 教程中打开的菜单与弹窗显示在遮罩之上 */
body.tutorial-active .selector,
body.tutorial-active .color-input-container,
body.tutorial-active .save-manager {
    z-index: 2600;
}

/* 说明卡片 */
.tutorial-card {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 3100;
    width: 300px;
    max-width: calc(100vw - 24px);
    box-sizing: border-box;
    padding: 12px 16px 14px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    color: #333;
    font-size: 14px;
    line-height: 1.6;
}
.tutorial-card.placed {
    transition: left 0.25s ease, top 0.25s ease;
}
.tutorial-card.enter {
    animation: tutorial-card-enter 0.25s ease-out;
}
.tutorial-card.nudge {
    animation: tutorial-card-nudge 0.4s ease;
}
@keyframes tutorial-card-enter {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}
@keyframes tutorial-card-nudge {
    0%, 100% { transform: none; }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.tutorial-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #888;
}
.tutorial-quit-btn {
    padding: 2px 4px;
    border: none;
    background: none;
    color: #888;
    font-size: 12px;
    cursor: pointer;
}
.tutorial-quit-btn:hover {
    color: #e53935;
}

.tutorial-progress {
    height: 4px;
    margin: 6px 0 10px;
    border-radius: 2px;
    background: #e8eef3;
    overflow: hidden;
}
.tutorial-progress-bar {
    height: 100%;
    border-radius: 2px;
    background: #01b0f1;
    transition: width 0.3s ease;
}

.tutorial-title {
    margin-bottom: 4px;
    font-size: 17px;
    font-weight: bold;
    color: #01b0f1;
}
.tutorial-text kbd {
    display: inline-block;
    min-width: 1.4em;
    margin: 0 1px;
    padding: 0 4px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-bottom-width: 2px;
    border-radius: 4px;
    background: #f7f7f7;
    font-family: inherit;
    font-size: 12px;
    line-height: 1.5;
    text-align: center;
}

/* 等待操作的提示，完成后变绿 */
.tutorial-status {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    font-size: 13px;
    color: #888;
}
.tutorial-status[hidden] {
    display: none;
}
.tutorial-status::before {
    content: '';
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #01b0f1;
    animation: tutorial-status-blink 1.2s ease-in-out infinite;
}
.tutorial-card.done .tutorial-status {
    color: #35a853;
    font-weight: bold;
}
.tutorial-card.done .tutorial-status::before {
    display: none;
}
@keyframes tutorial-status-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.25; }
}

.tutorial-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}
.tutorial-actions button {
    padding: 6px 14px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
}
.tutorial-actions .primary {
    background: #01b0f1;
    color: #fff;
}
.tutorial-actions .primary:hover {
    background: #1f8bff;
}
.tutorial-actions .secondary {
    background: #eef2f5;
    color: #555;
}
.tutorial-actions .secondary:hover {
    background: #e0e6eb;
}

/* 响应式设计 */
@media (max-width: 600px) {
    .tutorial-card {
        padding: 10px 14px 12px;
        font-size: 13px;
    }
    .tutorial-title {
        font-size: 15px;
    }
    .tutorial-actions button {
        padding: 5px 12px;
        font-size: 13px;
    }
}