/* ============================================================
   Personal Homepage Stylesheet
   ------------------------------------------------------------
   Structure:
     1. Design Tokens (CSS variables)
     2. Base & Reset
     3. Layout Primitives (container, grid)
     4. Navigation
     5. Hero / About
     6. Section Shell (titles, spacing)
     7. News
     8. Publications
     9. Lists (Service, Awards, Bio, etc.)
    10. Footer
    11. Responsive
   ============================================================ */


/* ===== 1. Design Tokens ===== */
:root {
    /* Colors */
    --color-bg:              #fafafa;
    --color-bg-alt:          #ffffff;
    --color-text:            #2c2c2c;
    --color-text-muted:      #374151;
    --color-text-secondary:  #6b7280;
    --color-accent:          #2563eb;
    --color-accent-hover:    #1d4ed8;
    --color-accent-light:    #dbeafe;
    --color-border:          #e5e7eb;
    --color-highlight:       #dc2626;   /* red — reserved for top-tier emphasis (Oral) */
    --color-warm:            #c2410c;   /* orange — secondary emphasis (Highlight) */

    /* Badge palettes */
    --badge-conf-bg:         #eff6ff;
    --badge-conf-fg:         #1e40af;
    --badge-preprint-bg:     #f3f4f6;
    --badge-preprint-fg:     #6b7280;
    --badge-oral-bg:         #fef2f2;   /* red-tinted — Oral (top tier) */
    --badge-oral-fg:         #dc2626;
    --badge-highlight-bg:    #fff7ed;   /* orange-tinted — Highlight */
    --badge-highlight-fg:    #c2410c;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Crimson Pro', 'Georgia', 'Times New Roman', serif;

    /* Layout */
    --max-width: 860px;
    --nav-height: 56px;
    --photo-w: 120px;
    --photo-h: 200px;           /* 3:5 aspect ratio */
    --photo-w-mobile: 100px;
    --photo-h-mobile: 167px;
}


/* ===== 2. Base & Reset ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.65;
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-accent-hover);
}

strong {
    font-weight: 600;
}


/* ===== 3. Layout Primitives ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}


/* ===== 4. Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-name {
    font-weight: 600;
    font-size: 16px;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 450;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--color-text);
}


/* ===== 5. Hero / About ===== */
.hero {
    padding-top: calc(var(--nav-height) + 12px);
    padding-bottom: 48px;
    background: var(--color-bg-alt);
}

.hero-header {
    margin-bottom: 28px;
}

.hero-header h1 {
    font-family: var(--font-serif);
    font-size: 40px;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.2;
    margin-bottom: 4px;
    color: var(--color-text);
}

.hero-content {
    display: flex;
    gap: 36px;
    align-items: flex-start;
}

.hero-photo {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.hero-photo img {
    width: var(--photo-w);
    height: var(--photo-h);
    border-radius: 4px;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.title {
    font-size: 15px;
    color: var(--color-text-secondary);
    font-weight: 450;
}

.bio {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.bio:last-child {
    margin-bottom: 0;
}

.social-links {
    display: flex;
    gap: 8px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: color 0.15s, border-color 0.15s;
    border: 1px solid var(--color-border);
}

.social-links a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}


/* ===== 6. Section Shell ===== */
.section {
    padding: 48px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 22px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
    display: block;
}

.section-title-spaced {
    margin-top: 40px;
}

.section-subtitle {
    font-size: 13.5px;
    color: var(--color-text-secondary);
    margin-top: -16px;
    margin-bottom: 28px;
}


/* ===== 7. News ===== */
/* Scrollable container: shows ~4 items, rest accessed via scroll */
.news-list {
    display: flex;
    flex-direction: column;
    max-height: 188px;              /* ~4 rows of .news-item */
    overflow-y: auto;
    padding-right: 8px;             /* breathing room for scrollbar */
    border-top: 1px solid var(--color-border);
}

/* Slim custom scrollbar */
.news-list::-webkit-scrollbar {
    width: 6px;
}
.news-list::-webkit-scrollbar-track {
    background: transparent;
}
.news-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}
.news-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}
.news-list {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.news-item {
    display: flex;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 14.5px;
    align-items: baseline;
}

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

.news-date {
    flex-shrink: 0;
    width: 72px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent);
    font-variant-numeric: tabular-nums;
}

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

.highlight {
    color: var(--color-highlight);
    font-weight: 600;
}


/* ===== 8. Publications ===== */
.pub-year {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-top: 28px;
    margin-bottom: 12px;
    letter-spacing: 0.01em;
}

.pub-year:first-of-type {
    margin-top: 4px;
}

/* Card-style publication item */
.pub-item {
    padding: 14px 16px;
    margin-bottom: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-alt);
}

.pub-item:last-child {
    margin-bottom: 0;
}

.pub-title {
    font-family: var(--font-serif);
    font-size: 19px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 5px;
}

.pub-meta {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 4px;
    font-variant-numeric: tabular-nums;
}

.pub-venue {
    color: var(--color-accent);
    font-weight: 500;
    font-style: normal;
}

.pub-tag {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--badge-oral-fg);
    border: 1px solid var(--badge-oral-fg);
    border-radius: 2px;
    letter-spacing: 0.02em;
    vertical-align: 1px;
}

.pub-authors {
    font-size: 14.5px;
    color: var(--color-text-secondary);
    line-height: 1.55;
    margin-bottom: 6px;
}

.pub-authors strong {
    color: var(--color-text);
}

.pub-links {
    display: flex;
    gap: 10px;
}

.pub-links a {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 1px 0;
    border-bottom: 1px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

.pub-links a:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}


/* ===== 9. Lists (Service, Awards, Bio, etc.) ===== */
.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-list li {
    font-size: 15px;
    color: var(--color-text-muted);
    padding-left: 16px;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
}


/* ===== 10. Footer ===== */
.footer {
    padding: 28px 0;
    text-align: center;
    font-size: 13px;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

/* Visitor map (ClustrMaps widget wrapper) */
.visitor-map {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.visitor-label {
    font-family: var(--font-serif);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.visitor-map-frame {
    display: inline-block;
    width: 252px;              /* 240 map + 2*6 padding */
    padding: 6px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg-alt);
    opacity: 0.85;
    transition: opacity 0.2s;
    line-height: 0;
    overflow: hidden;
}

.visitor-map-frame:hover {
    opacity: 1;
}

/* Force everything injected by ClustrMaps to fit our frame */
.visitor-map-frame * {
    max-width: 240px !important;
    box-sizing: border-box;
}

.visitor-map-frame img {
    display: block;
    width: 240px;
    height: auto;
}


/* ===== 11. Responsive ===== */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .bio {
        text-align: justify;
        hyphens: auto;
        -webkit-hyphens: auto;
    }

    .hero-photo img {
        width: var(--photo-w-mobile);
        height: var(--photo-h-mobile);
    }

    .hero-header h1 {
        font-size: 32px;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-links a {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .news-item {
        flex-direction: column;
        gap: 2px;
    }

    .news-date {
        width: auto;
    }
}