/* LinkSound 图标系统 - 现代扁平风格 */

/* ===== 图标基础样式 ===== */
.icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    fill: currentColor;
    vertical-align: middle;
    transition: all var(--transition-normal);
}

.icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* ===== 图标尺寸 ===== */
.icon-xs {
    width: 12px;
    height: 12px;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.icon-md {
    width: 20px;
    height: 20px;
}

.icon-lg {
    width: 24px;
    height: 24px;
}

.icon-xl {
    width: 32px;
    height: 32px;
}

.icon-2xl {
    width: 48px;
    height: 48px;
}

.icon-3xl {
    width: 64px;
    height: 64px;
}

.icon-xxl {
    width: 80px;
    height: 80px;
}

/* ===== 图标颜色 ===== */
.icon-primary {
    color: var(--electric-blue);
}

.icon-secondary {
    color: var(--neon-purple);
}

.icon-accent {
    color: var(--flame-orange);
}

.icon-white {
    color: var(--white);
}

.icon-gray {
    color: var(--light-gray);
}

.icon-dark {
    color: var(--dark-gray);
}

/* ===== 图标效果 ===== */
.icon-glow {
    filter: drop-shadow(0 0 8px currentColor);
}

.icon-pulse {
    animation: iconPulse 2s ease-in-out infinite;
}

.icon-spin {
    animation: iconSpin 2s linear infinite;
}

.icon-bounce {
    animation: iconBounce 1s ease-in-out infinite;
}

.icon-hover-scale:hover {
    transform: scale(1.2);
}

.icon-hover-glow:hover {
    filter: drop-shadow(0 0 12px currentColor);
}

.icon-hover-rotate:hover {
    transform: rotate(15deg);
}

/* ===== 图标动画 ===== */
@keyframes iconPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

@keyframes iconSpin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes iconBounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translateY(0);
    }
    40%, 43% {
        transform: translateY(-8px);
    }
    70% {
        transform: translateY(-4px);
    }
    90% {
        transform: translateY(-2px);
    }
}

/* ===== 图标容器 ===== */
.icon-container {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    background: var(--dark-gray);
    transition: all var(--transition-normal);
}

.icon-container:hover {
    background: var(--electric-blue);
    color: var(--primary-black);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.icon-container.primary {
    background: var(--electric-blue);
    color: var(--primary-black);
}

.icon-container.secondary {
    background: var(--neon-purple);
    color: var(--white);
}

.icon-container.accent {
    background: var(--flame-orange);
    color: var(--primary-black);
}

/* ===== 图标按钮 ===== */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--light-gray);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.icon-btn:hover {
    background: var(--electric-blue);
    color: var(--primary-black);
    transform: translateY(-2px);
}

.icon-btn:active {
    transform: translateY(0);
}

.icon-btn.primary {
    background: var(--electric-blue);
    color: var(--primary-black);
}

.icon-btn.secondary {
    background: var(--neon-purple);
    color: var(--white);
}

.icon-btn.accent {
    background: var(--flame-orange);
    color: var(--primary-black);
}

/* ===== 图标列表 ===== */
.icon-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.icon-list-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--dark-gray);
}

.icon-list-item:last-child {
    border-bottom: none;
}

.icon-list-item .icon {
    margin-right: var(--spacing-md);
    color: var(--electric-blue);
}

.icon-list-item .text {
    flex: 1;
    color: var(--light-gray);
}

/* ===== 图标网格 ===== */
.icon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.icon-grid-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--dark-gray);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.icon-grid-item:hover {
    background: var(--medium-gray);
    transform: translateY(-2px);
}

.icon-grid-item .icon {
    margin-bottom: var(--spacing-sm);
    font-size: 24px;
    color: var(--electric-blue);
}

.icon-grid-item .label {
    font-size: 0.8rem;
    color: var(--light-gray);
    text-align: center;
}

/* ===== 特殊图标样式 ===== */
.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-lg);
    color: var(--electric-blue);
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3));
}

.nav-icon {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-sm);
}

.hero-icon {
    width: 80px;
    height: 80px;
    color: var(--electric-blue);
    filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.5));
    animation: iconPulse 3s ease-in-out infinite;
}

.card-icon {
    width: 32px;
    height: 32px;
    margin-bottom: var(--spacing-md);
    color: var(--electric-blue);
}

.platform-icon {
    width: 24px;
    height: 24px;
    margin-right: var(--spacing-sm);
}

/* ===== 响应式图标 ===== */
@media (max-width: 768px) {
    .feature-icon {
        width: 40px;
        height: 40px;
    }
    
    .hero-icon {
        width: 60px;
        height: 60px;
    }
    
    .icon-grid {
        grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .icon-btn {
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 480px) {
    .feature-icon {
        width: 32px;
        height: 32px;
    }
    
    .hero-icon {
        width: 48px;
        height: 48px;
    }
    
    .icon-grid {
        grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
    }
}

/* ===== 图标加载状态 ===== */
.icon-loading {
    opacity: 0.5;
    animation: iconPulse 1.5s ease-in-out infinite;
}

/* ===== 图标禁用状态 ===== */
.icon-disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== 图标组合 ===== */
.icon-with-text {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.icon-with-badge {
    position: relative;
}

.icon-with-badge::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 8px;
    height: 8px;
    background: var(--flame-orange);
    border-radius: 50%;
    border: 2px solid var(--primary-black);
}

/* ===== 图标工具提示 ===== */
.icon-tooltip {
    position: relative;
}

.icon-tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-black);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.icon-tooltip:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}