:root{--bg-color: #0d1117;--text-primary: #e6edf3;--text-secondary: #8b949e;--accent-color: #58a6ff;--card-bg: #161b22;--card-border: #30363d;--hover-border: #8b949e;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 48px;--radius-md: 12px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-family);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent-color);text-decoration:none;transition:color .2s ease}a:hover{text-decoration:underline}h1,h2,h3{font-weight:600;letter-spacing:-.02em}.filter-bar{display:flex;justify-content:center;gap:var(--spacing-xl);margin-bottom:var(--spacing-xl);padding:var(--spacing-md);background-color:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-md);flex-wrap:wrap}.filter-group{display:flex;align-items:center;gap:var(--spacing-sm)}.filter-group label{color:var(--text-secondary);font-weight:600;font-size:.875rem}.filter-group select{background-color:var(--bg-color);color:var(--text-primary);border:1px solid var(--card-border);border-radius:6px;padding:6px 12px;font-size:.9rem;outline:none;cursor:pointer;transition:border-color .2s}.filter-group select:hover,.filter-group select:focus{border-color:var(--accent-color)}.app-container{max-width:1200px;margin:0 auto;padding:var(--spacing-lg) var(--spacing-md)}.site-header{text-align:center;margin-bottom:var(--spacing-xl)}.site-header h1{font-size:3rem;margin-bottom:var(--spacing-sm);background:linear-gradient(135deg,#fff,#8b949e);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.site-header p{color:var(--text-secondary);font-size:1.25rem}.conference-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--spacing-sm)}.no-data{grid-column:1 / -1;text-align:center;color:var(--text-secondary);padding:var(--spacing-lg)}.conference-card{background-color:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-md);padding:12px;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;position:relative;overflow:visible}.conference-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000004d;border-color:var(--hover-border)}.card-header{margin-bottom:8px}.title-row{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:2px}.conference-name{font-size:1.15rem;margin:0;line-height:1.2}.conference-name a{color:var(--text-primary);text-decoration:none}.conference-name a:hover{color:var(--accent-color)}.conference-place{font-size:.75rem;color:var(--text-secondary);text-align:right;flex-shrink:0;margin-left:8px}.tags{display:flex;gap:4px;flex-wrap:wrap}.tag{background-color:#388bfd26;color:var(--accent-color);padding:0 6px;border-radius:999px;font-size:.65rem;font-weight:500}.card-body{flex-grow:1;display:flex;flex-direction:column;gap:8px}.deadline-info{display:flex;flex-direction:column;align-items:center;background:#ffffff08;padding:8px;border-radius:8px}.deadline-label{font-size:.7rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:2px}.deadline-date{font-weight:600;font-size:.9rem}.countdown{display:flex;justify-content:center;gap:8px;margin-bottom:4px}.countdown-item{display:flex;flex-direction:column;align-items:center;min-width:28px}.countdown-item .value{font-size:1.3rem;font-weight:700;font-variant-numeric:tabular-nums;line-height:1}.countdown-item .label{font-size:.65rem;color:var(--text-secondary);margin-top:1px}.deadline-passed{display:block;text-align:center;color:#ff7b72;font-weight:600;padding:var(--spacing-md)}.card-footer{margin-top:var(--spacing-lg);display:flex;justify-content:center;gap:var(--spacing-sm)}.btn-calendar,.btn-link{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background-color:var(--card-border);color:var(--text-primary);border-radius:6px;font-size:.8rem;font-weight:600;text-decoration:none;transition:all .2s ease;cursor:pointer;border:none;line-height:1}.btn-calendar:hover,.btn-link:hover{background-color:var(--accent-color);color:#fff;text-decoration:none}.btn-link{background-color:transparent;border:1px solid var(--card-border)}.btn-link:hover{border-color:var(--accent-color)}.site-footer{text-align:center;margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid var(--card-border);color:var(--text-secondary);font-size:.875rem}.footer-sub{margin-top:var(--spacing-sm);font-size:.8rem;opacity:.8}@media(max-width:600px){.site-header h1{font-size:2rem}.conference-list{grid-template-columns:1fr}}.section-title{font-size:1.5rem;margin-bottom:var(--spacing-lg);color:var(--text-primary);border-left:4px solid var(--accent-color);padding-left:var(--spacing-sm)}.section-divider{height:1px;background-color:var(--card-border);margin:var(--spacing-xl) 0}.section-past .conference-card{opacity:.7}.section-past .conference-card:hover{opacity:1}.calendar-dropdown-container{position:relative;display:inline-block}.calendar-options{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background-color:var(--card-bg);border:1px solid var(--card-border);border-radius:8px;box-shadow:0 -4px 12px #0000004d;padding:8px 0;min-width:140px;z-index:10;margin-bottom:8px;display:flex;flex-direction:column}.calendar-options:after{content:"";position:absolute;top:100%;left:50%;margin-left:-6px;border-width:6px;border-style:solid;border-color:var(--card-border) transparent transparent transparent}.calendar-options a{display:block;padding:8px 16px;color:var(--text-primary);text-decoration:none;font-size:.875rem;transition:background .2s;text-align:left}.calendar-options a:hover{background-color:var(--card-border);color:var(--accent-color)}