:root{--container-width:1200px;--transition-speed:0.3s;--primary-color:#3498db;--secondary-color:#2c3e50;--text-color:#333;--background-color:#f9f9f9;--header-bg:#ffffff;--footer-bg:#f1f1f1;--card-bg:#ffffff;--card-shadow:0 2px 10px rgba(0,0,0,0.05);--border-color:rgba(0,0,0,0.1)}[data-theme=dark]{--primary-color:#5dade2;--secondary-color:#a3c6e9;--text-color:#f1f1f1;--background-color:#1a1a1a;--header-bg:#222222;--footer-bg:#222222;--card-bg:#2c2c2c;--card-shadow:0 2px 10px rgba(0,0,0,0.2);--border-color:rgba(255,255,255,0.1)}*{box-sizing:border-box}body{font-family:'Arial',sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--background-color);transition:color var(--transition-speed) ease,background-color var(--transition-speed) ease}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 20px}h1,h2,h3,h4,h5,h6{margin-top:0;line-height:1.2}a{color:var(--primary-color);text-decoration:none;transition:color 0.3s ease}a:hover{color:var(--secondary-color)}.site-header{background-color:var(--header-bg);box-shadow:0 2px 5px rgba(0,0,0,0.1);padding:1rem 0;position:sticky;top:0;z-index:100;width:100%}.site-header .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.logo-container{display:flex;align-items:center}.site-title{margin:0;font-size:1.5rem;color:var(--secondary-color)}.main-nav{display:flex;align-items:center}.nav-list{display:flex;list-style:none;margin:0;padding:0;transition:all 0.3s ease}.nav-item{margin-left:1.5rem}.nav-link{font-weight:bold;display:block;padding:0.5rem 0;position:relative}.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--primary-color);transition:width 0.3s ease}.nav-link:hover::after{width:100%}.mobile-menu-toggle{display:none;background:transparent;border:none;cursor:pointer;padding:0.5rem;z-index:200}.mobile-menu-toggle .bar{display:block;width:25px;height:3px;margin:5px auto;background-color:var(--secondary-color);transition:all 0.3s ease}.site-main{padding:2rem 0}.section{margin-bottom:3rem;padding:2rem 0}.section-title{margin-bottom:1.5rem;position:relative;padding-bottom:0.5rem}.section-title::after{content:'';position:absolute;bottom:0;left:0;width:50px;height:3px;background-color:var(--primary-color)}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}.grid-item{padding:1rem;border-radius:4px;background-color:var(--card-bg);box-shadow:var(--card-shadow);transition:background-color var(--transition-speed) ease,box-shadow var(--transition-speed) ease}.grid-item-full{grid-column:span 12}.grid-item-half{grid-column:span 6}.grid-item-third{grid-column:span 4}.grid-item-quarter{grid-column:span 3}@media (max-width:992px){.grid-item-third,.grid-item-quarter{grid-column:span 6}}@media (max-width:768px){.grid{gap:15px}.grid-item-half{grid-column:span 12}}@media (max-width:480px){.grid-item-third,.grid-item-quarter{grid-column:span 12}.section{padding:1.5rem 0}}.site-footer{background-color:var(--footer-bg);padding:2rem 0 1rem;border-top:1px solid rgba(0,0,0,0.1)}.footer-content{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-bottom:2rem}.footer-section{display:flex;flex-direction:column}.footer-title{font-size:1.2rem;margin-bottom:1rem;color:var(--secondary-color)}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:0.5rem}.social-links{display:flex;gap:15px}.social-links a{display:inline-block;margin-right:10px}.footer-bottom{text-align:center;padding-top:1rem;border-top:1px solid rgba(0,0,0,0.05);font-size:0.9rem;color:#666}@media (max-width:768px){.footer-content{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.footer-content{grid-template-columns:1fr;gap:20px}.site-footer{padding:1.5rem 0 1rem}.footer-section{text-align:center}.social-links{justify-content:center}}@media (max-width:768px){.site-header .container{position:relative}.mobile-menu-toggle{display:block}.main-nav{width:100%;max-height:0;overflow:hidden;transition:max-height 0.5s ease}.main-nav.active{max-height:300px}.nav-list{flex-direction:column;width:100%;padding:1rem 0}.nav-item{margin:0;width:100%;text-align:center}.nav-link{padding:0.75rem 0}.mobile-menu-toggle.active .bar:nth-child(1){transform:translateY(8px) rotate(45deg)}.mobile-menu-toggle.active .bar:nth-child(2){opacity:0}.mobile-menu-toggle.active .bar:nth-child(3){transform:translateY(-8px) rotate(-45deg)}}@media (max-width:480px){.site-title{font-size:1.2rem}}.theme-switcher{display:flex;align-items:center;margin-right:1.5rem}.theme-toggle{position:relative;width:50px;height:24px;border-radius:12px;background-color:var(--secondary-color);cursor:pointer;transition:background-color var(--transition-speed) ease;border:none;padding:0;overflow:hidden}.theme-toggle::before{content:'';position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background-color:#fff;transition:transform var(--transition-speed) ease;z-index:1}.theme-toggle.dark::before{transform:translateX(26px)}.theme-toggle .icon{position:absolute;top:4px;width:16px;height:16px;transition:opacity var(--transition-speed) ease}.theme-toggle .sun-icon{left:4px;opacity:1}.theme-toggle .moon-icon{right:4px;opacity:0}.theme-toggle.dark .sun-icon{opacity:0}.theme-toggle.dark .moon-icon{opacity:1}.site-header,.site-footer,.nav-link,a,.section-title::after,.footer-title,.footer-bottom{transition:all var(--transition-speed) ease}@media (max-width:768px){.theme-switcher{position:absolute;top:15px;right:60px}}.gallery-controls{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.gallery-filters,.gallery-sort{display:flex;align-items:center;gap:0.5rem}.gallery-filters label,.gallery-sort label{font-weight:bold}.gallery-filters select,.gallery-sort select{padding:0.5rem;border-radius:4px;border:1px solid var(--border-color);background-color:var(--card-bg);color:var(--text-color);font-size:0.9rem;cursor:pointer;transition:border-color var(--transition-speed) ease}.gallery-filters select:focus,.gallery-sort select:focus{outline:none;border-color:var(--primary-color)}.gallery-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;margin-top:1rem}.gallery-item{border-radius:8px;overflow:hidden;background-color:var(--card-bg);box-shadow:var(--card-shadow);transition:transform var(--transition-speed) ease,box-shadow var(--transition-speed) ease,background-color var(--transition-speed) ease;contain:content}.gallery-item:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,0.1)}.gallery-item-inner{display:flex;flex-direction:column;height:100%}.gallery-image{position:relative;overflow:hidden;aspect-ratio:16 / 9}.gallery-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-speed) ease,opacity var(--transition-speed) ease}.gallery-image img.lazy{opacity:0}.gallery-image img.lazy[src^="data:image"]{background-color:#f0f0f0}.gallery-image img.lazy.loaded{opacity:1}.gallery-item:hover .gallery-image img{transform:scale(1.05)}.gallery-content{padding:1.25rem;display:flex;flex-direction:column;flex-grow:1}.gallery-title{margin-top:0;margin-bottom:0.5rem;font-size:1.2rem;color:var(--text-color)}.gallery-description{margin-bottom:1rem;font-size:0.9rem;color:var(--text-color);opacity:0.8;flex-grow:1}.gallery-tags{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:auto}.gallery-tag{display:inline-block;padding:0.25rem 0.75rem;background-color:var(--primary-color);color:white;border-radius:20px;font-size:0.75rem;font-weight:bold;transition:background-color var(--transition-speed) ease}@media (max-width:992px){.gallery-container{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.25rem}}@media (max-width:768px){.gallery-controls{flex-direction:column;align-items:flex-start}.gallery-filters,.gallery-sort{width:100%}.gallery-filters select,.gallery-sort select{flex-grow:1}}@media (max-width:480px){.gallery-container{grid-template-columns:1fr;gap:1rem}.gallery-content{padding:1rem}}.gallery-item{animation:fadeIn 0.5s ease forwards}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.gallery-item.hidden{display:none}.contact-form{margin-top:2rem;background-color:var(--card-bg);padding:2rem;border-radius:8px;box-shadow:var(--card-shadow);transition:background-color var(--transition-speed) ease,box-shadow var(--transition-speed) ease}.form-group{margin-bottom:1.5rem;contain:layout style}.form-label{display:block;margin-bottom:0.5rem;font-weight:bold;color:var(--text-color)}.form-control{display:block;width:100%;padding:0.75rem;font-size:1rem;line-height:1.5;color:var(--text-color);background-color:var(--background-color);background-clip:padding-box;border:1px solid var(--border-color);border-radius:4px;transition:border-color var(--transition-speed) ease,box-shadow var(--transition-speed) ease}.form-control:focus{border-color:var(--primary-color);outline:0;box-shadow:0 0 0 0.2rem rgba(52,152,219,0.25)}.form-control.is-valid{border-color:#2ecc71}.form-control.is-invalid{border-color:#e74c3c}.error-message{display:none;color:#e74c3c;font-size:0.875rem;margin-top:0.25rem}.error-message.visible{display:block}.required{color:#e74c3c}.checkbox-group{margin-bottom:1rem}.checkbox-wrapper{display:flex;align-items:flex-start}.form-checkbox{margin-top:0.25rem;margin-right:0.5rem;min-width:1.25rem;min-height:1.25rem}.checkbox-label{font-weight:normal}.form-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.btn{display:inline-block;font-weight:600;text-align:center;white-space:nowrap;vertical-align:middle;user-select:none;border:1px solid transparent;padding:0.75rem 1.5rem;font-size:1rem;line-height:1.5;border-radius:4px;transition:color var(--transition-speed) ease,background-color var(--transition-speed) ease,border-color var(--transition-speed) ease,box-shadow var(--transition-speed) ease;cursor:pointer}.btn:focus{outline:0;box-shadow:0 0 0 0.2rem rgba(52,152,219,0.25)}.btn-primary{color:#fff;background-color:var(--primary-color);border-color:var(--primary-color)}.btn-primary:hover{background-color:#2980b9;border-color:#2980b9}.btn-secondary{color:var(--text-color);background-color:transparent;border-color:var(--border-color)}.btn-secondary:hover{background-color:rgba(0,0,0,0.05)}.form-progress{margin-bottom:2rem;display:flex;align-items:center}.progress-bar{flex-grow:1;height:8px;background-color:var(--border-color);border-radius:4px;overflow:hidden;margin-right:1rem}.progress-fill{height:100%;background-color:var(--primary-color);width:0%;transition:width 0.3s ease}.progress-text{font-size:0.875rem;font-weight:bold;color:var(--text-color);min-width:80px;text-align:right}.form-message{display:none;margin-top:1.5rem;padding:1rem;border-radius:4px;font-weight:bold}.form-message.success{display:block;background-color:rgba(46,204,113,0.1);border:1px solid #2ecc71;color:#2ecc71}.form-message.error{display:block;background-color:rgba(231,76,60,0.1);border:1px solid #e74c3c;color:#e74c3c}@media (max-width:768px){.contact-form{padding:1.5rem}.form-actions{flex-direction:column}.btn{width:100%;margin-bottom:0.5rem}}@media (max-width:480px){.contact-form{padding:1rem}.form-control{padding:0.625rem;font-size:0.9rem}.form-checkbox{min-width:1.5rem;min-height:1.5rem}}