/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(-45deg, #0f172a, #111827, #1e293b, #111827);
    background-size: 400% 400%;
    animation: gradientBreathing 8s ease infinite;
    min-height: 100vh;
    padding: 1rem;
    padding-top: 6rem;
    padding-bottom: 6rem;
    color: #fff;
    display: flex;
    flex-direction: column;
}

/* 应用容器 */
.app-container {
    width: 100%;
    max-width: 42rem;
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    width: 100%;
    flex: 1;
}

/* 头部 */
.app-header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.app-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 0.5rem;
}

.app-subtitle {
    font-size: 1.125rem;
    color: #9ca3af;
}

/* 主卡片 */
.main-card {
    background: rgba(31, 41, 55, 0.5);
    backdrop-filter: blur(12px);
    border: 1px solid #374151;
    border-radius: 0.75rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 2rem;
}

/* 警告框 */
.alert-box {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    max-height: 200px;
    overflow: hidden;
    transition: all 0.25s ease-in-out;
    opacity: 1;
}

.alert-box.hiding {
    max-height: 0;
    margin-bottom: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
}

.alert-box.success {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.alert-box.warning {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.alert-box.error {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* URL输入表单 */
.url-form {
    margin-bottom: 1.5rem;
}

.input-wrapper {
    display: flex;
}

.input-container {
    flex: 1;
    position: relative;
    display: flex;
}

.input-icon {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding-left: 0.75rem;
    pointer-events: none;
}

.input-icon .icon {
    width: 1.25rem;
    height: 1.25rem;
    color: #9ca3af;
}

.video-input {
    flex: 1;
    width: 100%;
    background: #374151;
    border: 1px solid #4b5563;
    border-radius: 0.5rem 0 0 0.5rem;
    padding: 0.75rem 3rem 0.75rem 2.5rem;
    color: #e5e7eb;
    font-size: 1rem;
    transition: all 0.2s;
}

.video-input::placeholder {
    color: #6b7280;
}

.video-input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

.video-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.clear-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    background: #4b5563;
    border: none;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    cursor: pointer;
    color: #9ca3af;
    transition: all 0.2s;
    z-index: 2;
}

.clear-btn:hover {
    background: #6b7280;
    color: #f87171;
}

.clear-btn .icon {
    width: 1rem;
    height: 1rem;
}

.parse-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    background: #2563eb;
    color: white;
    font-weight: bold;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0 0.5rem 0.5rem 0;
    cursor: pointer;
    transition: all 0.3s;
    flex-shrink: 0;
    margin-left: 0;
}

.parse-btn:hover:not(:disabled) {
    background: #1d4ed8;
}

.parse-btn:disabled {
    background: rgba(37, 99, 235, 0.5);
    cursor: not-allowed;
}

.parse-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.5);
}

/* 加载动画 */
.spinner {
    width: 1.25rem;
    height: 1.25rem;
    animation: spin 1s linear infinite;
}

.spinner-track {
    opacity: 0.25;
}

.spinner-path {
    opacity: 0.75;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* 呼吸渐变动画 */
@keyframes gradientBreathing {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* 错误提示 */
.error-alert {
    background: rgba(220, 38, 38, 0.5);
    color: #fca5a5;
    border: 1px solid #dc2626;
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
}

/* 视频结果 */
.video-result {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.video-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.video-thumbnail {
    width: 100%;
    aspect-ratio: 1 / 1;
    /* 固定1:1方形比例 */
    object-fit: cover;
    /* 裁剪超出部分 */
    object-position: center;
    /* 居中裁剪 */
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.video-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.video-platform {
    font-size: 0.875rem;
    font-weight: 600;
    color: #60a5fa;
    text-transform: uppercase;
}

.video-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #fff;
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin: 0.5rem 0;
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.75rem;
    color: #9ca3af;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.meta-value {
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
}

.download-btn {
    width: 100%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    background: #2563eb;
    color: white;
    font-weight: bold;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 0.5rem;
}

.download-btn:hover {
    background: #1d4ed8;
}

.download-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.5);
}

.download-btn .icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* 微信二维码区域 */
.wechat-section {
    width: 100%;
    max-width: 900px;
    margin: calc(2rem + 120px) auto 1.5rem;
    padding: 1.5rem 1rem;
    text-align: center;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.wechat-section.visible {
    display: flex;
}

.wechat-section.hiding {
    opacity: 0;
    transform: translateY(-20px);
}

.wechat-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.wechat-qrcode {
    width: 120px;
    height: 120px;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.wechat-description {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.5;
}

.close-wechat-btn {
    position: absolute;
    top: -10px;
    right: 90px;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
    z-index: 10;
}

.close-wechat-btn:hover {
    transform: scale(1.1);
    opacity: 0.8;
}

.close-wechat-btn .close-icon {
    width: 24px;
    height: 24px;
}

/* 底部 */
.app-footer {
    position: fixed;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    padding: 1.5rem 1rem;
    z-index: 10;
}

.language-switcher {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.lang-btn {
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: all 0.2s;
    opacity: 0.6;
}

.lang-btn:hover {
    opacity: 1;
}

.lang-btn.active {
    opacity: 1;
    font-weight: bold;
}

.lang-divider {
    color: #6b7280;
    font-size: 0.875rem;
}

.app-footer p {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0.25rem 0;
}

.app-footer .disclaimer {
    white-space: nowrap;
    max-width: 100%;
}

/* 响应式设计 */
@media (min-width: 640px) {
    .app-title {
        font-size: 3rem;
    }

    .main-card {
        padding: 2rem;
    }

    .video-content {
        flex-direction: row;
        gap: 1.5rem;
    }

    .video-thumbnail {
        width: 33.333333%;
        aspect-ratio: 1 / 1;
        /* PC端也保持1:1方形 */
        flex-shrink: 0;
    }

    .video-details {
        flex: 1;
    }

    .download-btn {
        margin-top: auto;
    }
}

@media (max-width: 639px) {
    .app-title {
        font-size: 2rem;
    }

    .main-card {
        padding: 1.5rem;
    }
}

/* 平台支持部分 */
.platforms-section {
    width: 100%;
    max-width: 900px;
    margin: 2rem auto 1.5rem;
    padding: 0 1rem;
}

.platforms-description {
    color: #6b7280;
    font-size: 0.95rem;
    text-align: center;
    margin-bottom: calc(1.5rem - 20px);
    line-height: 1.5;
}

.platforms-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(2.5rem + 15px);
    flex-wrap: wrap;
    padding: 1.5rem;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

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

.platform-name {
    color: #cbd5e1;
    font-size: 0.85rem;
    text-align: center;
    font-weight: 500;
}

@media (max-width: 639px) {
    .platforms-container {
        gap: 1.5rem;
        padding: 1rem;
    }

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

    .platform-name {
        font-size: 0.75rem;
    }
}

/* 侧边通知卡片 */
.side-notification {
    position: fixed;
    left: 2rem;
    bottom: 25vh;
    /* 向上调整位置 */
    width: 320px;
    background: rgba(31, 41, 55, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    /* 翻转进入动画 */
    animation: flipIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-origin: left center;
    perspective: 1000px;
    transition: all 0.3s ease;
}

.side-notification:hover {
    transform: translateY(-5px) rotateY(2deg);
    /* 悬停时微弱的3D效果 */
    box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.2);
}

.side-notification.hiding {
    /* 翻转消失动画 */
    animation: flipOut 0.6s cubic-bezier(0.6, -0.28, 0.735, 0.045) forwards;
}

@keyframes flipIn {
    0% {
        opacity: 0;
        transform: perspective(1000px) rotateY(-90deg);
    }

    100% {
        opacity: 1;
        transform: perspective(1000px) rotateY(0deg);
    }
}

@keyframes flipOut {
    0% {
        opacity: 1;
        transform: perspective(1000px) rotateY(0deg);
    }

    100% {
        opacity: 0;
        transform: perspective(1000px) rotateY(-90deg);
    }
}

.close-side-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #9ca3af;
    transition: all 0.2s;
}

.close-side-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    transform: rotate(90deg);
}

.close-side-btn .icon {
    width: 14px;
    height: 14px;
}

.side-content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.side-text {
    font-size: 0.875rem;
    color: #ACB2BA;
    line-height: 1.6;
}

.side-text p {
    margin-bottom: 0.5rem;
}

.side-text p:last-child {
    margin-bottom: 0;
}

.side-text .warning-text {
    color: #fff;
}

.side-text .highlight {
    color: #fbbf24;
    font-weight: bold;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.side-text strong {
    color: #fff;
}

.side-qrcode {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.75rem;
    border-radius: 0.75rem;
}

.qrcode-img {
    width: 64px;
    height: 64px;
    border-radius: 0.5rem;
}

.qrcode-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.qrcode-title {
    font-size: 0.9rem;
    color: #e5e7eb;
    margin: 0;
}

.qrcode-title strong {
    color: #60a5fa;
}

.qrcode-slogan {
    font-size: 0.75rem;
    color: #9ca3af;
    margin: 0;
    line-height: 1.4;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .side-notification {
        display: none !important;
        /* 小屏幕不显示侧边栏，或者可以改为底部弹窗 */
    }
}