/**
 * 交互反馈增强
 * 按钮、卡片、链接的hover/active效果
 */

/* ==================== 按钮涟漪效果 ==================== */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple-effect 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-effect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* ==================== 卡片悬停效果 ==================== */
.card-lift {
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-lift:hover {
    transform: translateY(-8px) rotate(0.5deg);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(231, 76, 60, 0.1);
}

/* ==================== 卡片边框光效 ==================== */
.card-glow-border {
    position: relative;
}

.card-glow-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(
        135deg,
        transparent 40%,
        var(--accent) 50%,
        transparent 60%
    );
    background-size: 300% 300%;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
    animation: border-shine 3s ease-in-out infinite;
}

@keyframes border-shine {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.card-glow-border:hover::before {
    opacity: 0.6;
}

/* ==================== 链接下划线动画 ==================== */
.link-draw {
    text-decoration: none;
    background: linear-gradient(var(--secondary), var(--secondary)) no-repeat left bottom;
    background-size: 0% 2px;
    transition: background-size 0.3s ease;
}

.link-draw:hover {
    background-size: 100% 2px;
}

/* ==================== Tab标签效果 ==================== */
.tab-nostalgic {
    position: relative;
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: inherit;
    color: inherit;
}

.tab-nostalgic::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.tab-nostalgic:hover::before,
.tab-nostalgic.active::before {
    width: 100%;
}

.tab-nostalgic.active {
    color: var(--secondary);
}

/* ==================== 模态框动画 ==================== */
.modal {
    animation: modal-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modal-pop {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-overlay {
    animation: modal-overlay-fade 0.3s ease;
}

@keyframes modal-overlay-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==================== 底部导航增强 ==================== */
.tab-item {
    position: relative;
    transition: all 0.3s ease;
}

.tab-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--secondary);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.tab-item:hover::after,
.tab-item.active::after {
    width: 60%;
}

.tab-item.active {
    color: var(--secondary);
}

.tab-item.active .tab-icon {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}

.tab-icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

/* ==================== 输入框聚焦效果 ==================== */
.input-nostalgic {
    border: 2px solid transparent;
    background: linear-gradient(var(--bg), var(--bg)) padding-box,
                linear-gradient(135deg, var(--bg-dark), var(--bg), var(--bg-dark)) border-box;
    transition: all 0.3s ease;
}

.input-nostalgic:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--secondary), var(--accent));
}

/* ==================== Section入场动画 ==================== */
.section-animated {
    opacity: 0;
    animation: section-enter 0.5s ease-out forwards;
}

.section-animated:nth-child(1) { animation-delay: 0.1s; }
.section-animated:nth-child(2) { animation-delay: 0.2s; }
.section-animated:nth-child(3) { animation-delay: 0.3s; }
.section-animated:nth-child(4) { animation-delay: 0.4s; }

@keyframes section-enter {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 点赞动画 ==================== */
.like-btn {
    transition: transform 0.2s ease;
}

.like-btn:active {
    transform: scale(1.3);
}

.like-animation {
    animation: like-pop 0.4s ease;
}

@keyframes like-pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* ==================== 页面淡入效果 ==================== */
.page-content-fade {
    animation: content-fade-in 0.6s ease-out;
}

@keyframes content-fade-in {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}