/* ========================================
   深空配色方案 - Deep Space Theme
   Academic Homepage for OramMC
   ======================================== */

:root {
    /* 亮色主题 - 白色背景 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --accent-primary: #0066cc;
    --accent-secondary: #ff6b35;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-muted: #999999;
    --avatar-glow: rgba(0, 102, 204, 0.25);
    
    /* 布局变量 */
    --sidebar-width: 280px;
    --content-max-width: 900px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* 暗色主题 */
body.dark-theme {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --accent-primary: #64ffda;
    --accent-secondary: #ffd700;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --avatar-glow: rgba(100, 255, 218, 0.3);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* 星空动画背景 */
.stars, .stars2, .stars3 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

body.dark-theme .stars,
body.dark-theme .stars2,
body.dark-theme .stars3 {
    opacity: 1;
}

.stars {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle fill="%23ffffff" cx="50" cy="50" r="1" opacity="0.9"/></svg>') repeat;
    background-size: 100px 100px;
    animation: animateStars 100s linear infinite;
}

.stars2 {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle fill="%23ffd700" cx="30" cy="70" r="0.8" opacity="0.8"/></svg>') repeat;
    background-size: 150px 150px;
    animation: animateStars 150s linear infinite;
}

.stars3 {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle fill="%2364ffda" cx="70" cy="30" r="0.6" opacity="0.7"/></svg>') repeat;
    background-size: 200px 200px;
    animation: animateStars 200s linear infinite;
}

@keyframes animateStars {
    from { transform: translateY(0); }
    to { transform: translateY(-100%); }
}

/* Container */
.container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* ========================================
   左侧边栏
   ======================================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-right: 1px solid var(--bg-tertiary);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 100;
}

/* Profile */
.profile {
    text-align: center;
    margin-bottom: 30px;
}

.avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-primary);
    margin-bottom: 15px;
    transition: var(--transition);
    box-shadow: 0 0 20px var(--avatar-glow);
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--avatar-glow);
}

.name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.title {
    font-size: 0.95rem;
    color: var(--accent-primary);
    margin-bottom: 3px;
}

.affiliation {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Contact Info */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--bg-tertiary);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.9rem;
}

.contact-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
}

.contact-item i {
    width: 20px;
    text-align: center;
}

/* Navigation */
.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-grow: 1;
}

.nav-item {
    padding: 10px 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.95rem;
    position: relative;
}

.nav-item:hover,
.nav-item.active {
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background-color: var(--accent-primary);
    border-radius: 2px;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   主内容区
   ======================================== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 40px 60px;
    max-width: calc(var(--sidebar-width) + var(--content-max-width) + 120px);
}

/* Section 通用样式 */
.section {
    margin-bottom: 60px;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--bg-tertiary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--accent-primary);
}

/* About Section */
.about-content p {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

.highlight {
    color: var(--accent-primary);
    font-weight: 500;
}

.research-interests {
    margin-top: 25px;
}

.research-interests h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 15px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.tag:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* News Section */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.news-item {
    display: flex;
    gap: 20px;
    padding: 15px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--accent-primary);
}

.news-date {
    color: var(--accent-primary);
    font-weight: 600;
    min-width: 80px;
}

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

/* Research Section */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.research-card {
    padding: 25px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-tertiary);
    transition: var(--transition);
}

.research-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.research-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 12px;
    margin-bottom: 15px;
    font-size: 1.3rem;
    color: var(--bg-primary);
}

.research-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.research-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Publications Section */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.pub-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-tertiary);
    transition: var(--transition);
}

.pub-item:hover {
    border-color: var(--accent-primary);
}

.pub-image {
    flex-shrink: 0;
    width: 150px;
    height: 100px;
    border-radius: 6px;
    overflow: hidden;
    background-color: var(--bg-tertiary);
}

.pub-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.pub-authors {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-style: italic;
    margin-bottom: 10px;
}

.pub-links {
    display: flex;
    gap: 15px;
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.8rem;
    transition: var(--transition);
}

.pub-link:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

/* Timeline (Education) */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    left: -30px;
    top: 5px;
    width: 14px;
    height: 14px;
    background-color: var(--accent-primary);
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
}

.timeline-content {
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-tertiary);
}

.timeline-content h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-place {
    color: var(--accent-primary);
    font-size: 0.95rem;
    margin-bottom: 3px;
}

.timeline-date {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.timeline-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Awards Section */
.awards-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.award-item {
    display: flex;
    gap: 20px;
    padding: 15px 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.award-year {
    color: var(--accent-secondary);
    font-weight: 600;
    min-width: 50px;
}

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

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    aspect-ratio: 4/3;
    background-color: var(--bg-secondary);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    font-size: 0.85rem;
    transform: translateY(100%);
    transition: var(--transition);
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

/* Reports Section */
.reports-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.report-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.report-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
}

.report-item i {
    color: var(--accent-secondary);
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 1px solid var(--bg-tertiary);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    margin: 0 auto 12px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}

body.dark-theme .theme-toggle:hover {
    border-color: var(--accent-primary);
    background-color: rgba(100, 255, 218, 0.1);
}

/* Footer */
.main-footer {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--bg-tertiary);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.main-footer p {
    margin-bottom: 10px;
}

.main-footer i {
    color: var(--accent-secondary);
}

/* Footer secret easter egg link */
.footer-secret {
    margin-top: 8px;
}

.secret-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.3;
    transition: opacity 0.3s ease;
    display: inline-block;
}

.secret-link:hover {
    opacity: 0;
    color: var(--text-muted);
}

/* ========================================
   暗色主题深空星空卡片光效
   ======================================== */
body.dark-theme .research-card:hover {
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}

body.dark-theme .gallery-item:hover img {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 900px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 20px;
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .container {
        flex-direction: column;
    }

    .profile {
        display: flex;
        align-items: center;
        text-align: left;
        gap: 20px;
    }

    .avatar {
        width: 80px;
        height: 80px;
    }

    .contact-info {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .pub-item {
        flex-direction: column;
    }

    .pub-image {
        width: 100%;
        height: 150px;
    }
}

@media (max-width: 600px) {
    .research-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tags {
        justify-content: center;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ========================================
   选中文本样式
   ======================================== */
::selection {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

/* ========================================
   暗色主题滚动条
   ======================================== */
body.dark-theme ::-webkit-scrollbar-thumb {
    background: #30363d;
}

body.dark-theme ::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}