/**
 * 全局基础样式
 * 重置样式、通用布局、工具类
 */

/* ===== CSS Reset ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ===== 页面基础 ===== */
html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.5;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 全屏应用容器 ===== */
.app {
    width: 100%;
    height: 100%;
    display: flex;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}
.blackboardcontainer{
    width: 100%;
    height: 100%;
}
/* ===== 隐藏元素 ===== */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== 文本工具类 ===== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: var(--text-muted);
}

.text-primary {
    color: var(--color-primary);
}

.text-secondary {
    color: var(--color-secondary);
}

.text-success {
    color: var(--color-success);
}

.text-danger {
    color: var(--color-danger);
}

/* ===== 弹性布局工具类 ===== */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-1 {
    flex: 1;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-xs {
    gap: var(--spacing-xs);
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

/* ===== 按钮基础样式 ===== */
.btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn:hover:not([disabled]) {
    transform: translateY(-2px);
}

.btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.5);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success), var(--color-success-dark));
    color: #fff;
}

.btn-success:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-danger), var(--color-danger-dark));
    color: #fff;
}

.btn-danger:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
}

.btn-secondary:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* 开始按钮样式 */
.btn-start {
    background: linear-gradient(135deg, var(--color-success), var(--color-success-dark));
    color: #fff;
}

.btn-start:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

/* 结束按钮样式 */
.btn-end {
    background: linear-gradient(135deg, var(--color-danger), var(--color-danger-dark));
    color: #fff;
}

.btn-end:hover:not([disabled]) {
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

/* ===== 输入框基础样式 ===== */
.input {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    outline: none;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

.input::placeholder {
    color: var(--text-muted);
}

/* ===== 动画关键帧 ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

@keyframes speakingPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}

/* ===== 响应式适配 ===== */
@media (max-width: 900px) {
    :root {
        --right-panel-width: var(--right-panel-width-sm);
    }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.5);
}