/* =========================================
 * BM-Tools 主样式表
 * 从 stitch_preview.html 提取并模块化
 * ========================================= */

/* -------------------------------------
 * CSS 变量
 * ------------------------------------- */
:root {
    --bg-light: #312052;
}

/* -------------------------------------
 * 全局基础样式
 * ------------------------------------- */
body,
html {
    background-color: var(--bg-light);
    color: #111827;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* -------------------------------------
 * 背景装饰层 (Awwwards 风格)
 * ------------------------------------- */
.ambient-mesh {
    position: fixed;
    inset: 0;
    z-index: -5;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(126, 90, 220, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(109, 40, 217, 0.05) 0%, transparent 40%);
}

.dot-matrix {
    position: fixed;
    inset: 0;
    z-index: -4;
    pointer-events: none;
    background-image: radial-gradient(rgba(126, 90, 220, 0.15) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* -------------------------------------
 * 顶部导航系统
 * ------------------------------------- */
.cyber-nav {
    position: fixed;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    border: 1px solid rgba(126, 90, 220, 0.1);
    box-shadow: 0 10px 40px rgba(126, 90, 220, 0.05);
    z-index: 100;
}

/* -------------------------------------
 * 语言切换开关
 * ------------------------------------- */
.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 64px;
    height: 28px;
    background: #fff;
    border-radius: 20px;
    border: 1px solid #e5e0f5;
    position: relative;
    cursor: pointer;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
    font-family: 'Space Mono', monospace;
    font-size: 10px;
    color: #6b7280;
    font-weight: bold;
}

.lang-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 28px;
    height: 22px;
    background: #7e5adc;
    border-radius: 12px;
    transition: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1;
    box-shadow: 0 4px 10px rgba(126, 90, 220, 0.4);
}

.lang-toggle.is-en .lang-slider {
    left: 32px;
    background: #6d28d9;
}

.lang-label {
    position: relative;
    z-index: 2;
    width: 50%;
    text-align: center;
    user-select: none;
}

.lang-toggle.is-en .lang-label:nth-child(3) {
    color: #fff;
}

.lang-toggle:not(.is-en) .lang-label:nth-child(2) {
    color: #fff;
}

/* -------------------------------------
 * 移动端侧边抽屉
 * ------------------------------------- */
#mobile-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 80;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#mobile-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

#mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: -10px 0 40px rgba(126, 90, 220, 0.1);
    z-index: 90;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

#mobile-drawer.active {
    transform: translateX(0);
}

.menu-item {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: #2b1b54;
    text-transform: uppercase;
    cursor: pointer;
    letter-spacing: 0.05em;
    padding: 1.2rem 0;
    border-bottom: 2px solid rgba(126, 90, 220, 0.1);
    transition: all 0.3s;
    transform: translateX(20px);
    opacity: 0;
    margin: 0;
    -webkit-text-stroke: 0px;
    text-shadow: none;
}

#mobile-drawer.active .menu-item {
    transform: translateX(0);
    opacity: 1;
}

#mobile-drawer.active .menu-item:nth-child(1) {
    transition-delay: 0.1s;
}

#mobile-drawer.active .menu-item:nth-child(2) {
    transition-delay: 0.15s;
}

#mobile-drawer.active .menu-item:nth-child(3) {
    transition-delay: 0.2s;
}

.menu-item:hover {
    color: #7e5adc;
    padding-left: 0.8rem;
    border-color: #7e5adc;
    transform: none !important;
}

/* -------------------------------------
 * 3D 解构卡片引擎
 * ------------------------------------- */
.v-card-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    perspective: 2000px;
}

.v-card-anchor {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    border-radius: 1.5rem;
    transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    will-change: transform;
}

.v-layer {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.6s;
    transform-style: preserve-3d;
}

/* 底板层 */
.v-base {
    background: #7e5adc;
    border: none;
    box-shadow: 0 4px 15px rgba(126, 90, 220, 0.3);
    transform: translateZ(0);
}

/* 玻璃层 */
.v-glass {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    transform: translateZ(20px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.6s, transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* 内容层 */
.v-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    transform: translateZ(10px);
    pointer-events: none;
}

/* 卡片内文本颜色覆盖 */
.v-content h2,
.v-content h3 {
    color: #ffffff !important;
}

.v-content p {
    color: rgba(255, 255, 255, 0.8) !important;
}

.v-content .tracking-widest {
    color: #f3e8ff !important;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* 悬停解构状态 */
.v-card-wrapper:hover .v-base {
    transform: translateZ(-30px);
    box-shadow: 0 30px 60px rgba(126, 90, 220, 0.4), 0 0 0 1px rgba(126, 90, 220, 0.6);
    background: #6d28d9;
}

.v-card-wrapper:hover .v-glass {
    opacity: 1;
    transform: translateZ(0px);
}

.v-card-wrapper:hover .v-content {
    transform: translateZ(60px) scale(1.05);
}

/* 卡片图标样式 */
.v-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    background: #fff !important;
    color: #7e5adc !important;
    border: none;
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: 0.4s;
}

.v-card-wrapper:hover .v-icon {
    background: #fff !important;
    color: #6d28d9 !important;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transform: scale(1.1) rotate(-5deg);
}

/* GSAP 入场动画初始状态 */
.gsap-reveal {
    opacity: 0;
    visibility: hidden;
}

/* -------------------------------------
 * 关键帧动画
 * ------------------------------------- */
@keyframes scan {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(300px); }
}

@keyframes scroll-up {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50%); }
}

@keyframes scroll-down {
    0% { transform: translateY(-50%); }
    100% { transform: translateY(0); }
}

/* -------------------------------------
 * 长截图滑动预览卡片（含封面切换）
 * ------------------------------------- */
.screenshot-scroll-container {
    position: absolute;
    inset: 0;
    overflow: hidden;
    border-radius: inherit;
}

.screenshot-scroll-container .scroll-long {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 4s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.6s ease;
    transform: translateY(0);
    opacity: 0;
    z-index: 2;
}

.screenshot-scroll-container .scroll-cover {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.6s ease;
    opacity: 1;
    z-index: 1;
}

/* 悬停时：隐藏封面，显示长截图并滚动 */
.v-card-wrapper:hover .screenshot-scroll-container .scroll-cover {
    opacity: 0;
}

.v-card-wrapper:hover .screenshot-scroll-container .scroll-long {
    opacity: 1;
    transform: translateY(calc(-100% + 560px));
}

/* -------------------------------------
 * GIF 悬停播放卡片
 * ------------------------------------- */
.gif-preview-container {
    position: absolute;
    inset: 0;
    overflow: hidden;
    border-radius: inherit;
}

.gif-preview-container .gif-static,
.gif-preview-container .gif-animated {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.5s ease;
}

/* 静态封面默认显示 */
.gif-preview-container .gif-static {
    opacity: 1;
    z-index: 1;
}

/* GIF 动图默认隐藏 */
.gif-preview-container .gif-animated {
    opacity: 0;
    z-index: 2;
}

/* 悬停时显示 GIF，隐藏封面 */
.v-card-wrapper:hover .gif-preview-container .gif-static {
    opacity: 0;
}

.v-card-wrapper:hover .gif-preview-container .gif-animated {
    opacity: 1;
}