@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";
@import "https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&display=swap";
:root{--color-black:#0a0a0a;--color-black-light:#1a1a1a;--color-black-lighter:#2a2a2a;--color-gold:#d4af37;--color-gold-light:#f4d03f;--color-gold-dark:#b8960c;--color-white:#fff;--color-gray:#888;--color-gray-light:#ccc;--gradient-gold:linear-gradient(135deg,#d4af37 0%,#f4d03f 50%,#d4af37 100%);--gradient-dark:linear-gradient(180deg,#0a0a0a 0%,#1a1a1a 100%);--shadow-gold:0 4px 20px #d4af374d;--shadow-dark:0 4px 20px #00000080;--font-main:"Inter",sans-serif;--font-display:"Playfair Display",serif;--transition-fast:.2s ease;--transition-medium:.3s ease;--transition-slow:.5s ease}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-main);background:var(--color-black);color:var(--color-white);min-height:100vh;line-height:1.6;overflow-x:hidden}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--color-black)}::-webkit-scrollbar-thumb{background:var(--color-gold);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-gold-light)}.navbar{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1000;height:80px;transition:var(--transition-medium);background:#0a0a0af2;border-bottom:1px solid #d4af3733;justify-content:space-between;align-items:center;padding:0 50px;display:flex;position:fixed;top:0;left:0;right:0}.navbar:hover{border-bottom-color:#d4af3766}.navbar-left{align-items:center;gap:30px;display:flex}.navbar-logo{font-family:var(--font-display);background:var(--gradient-gold);-webkit-text-fill-color:transparent;letter-spacing:1px;transition:var(--transition-medium);-webkit-background-clip:text;background-clip:text;align-items:center;gap:10px;font-size:1.8rem;font-weight:700;text-decoration:none;display:flex}.navbar-logo .logo-icon{width:40px;height:40px;color:var(--color-gold)}.navbar-logo:hover{filter:brightness(1.2);transform:scale(1.05)}.nav-link{color:var(--color-gray-light);transition:var(--transition-medium);border-radius:8px;padding:10px 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50px;font-size:1.2rem;font-weight:600;display:flex;position:relative;overflow:hidden}.color-btn:before{content:"";width:100%;height:100%;transition:var(--transition-slow);background:linear-gradient(90deg,#0000,#ffffff1a,#0000);position:absolute;top:0;left:-100%}.color-btn:hover:before{left:100%}.color-btn-white{background:var(--color-white);color:var(--color-black);border-color:var(--color-white)}.color-btn-white:hover{color:var(--color-white);background:0 0;transform:translateY(-5px);box-shadow:0 0 30px #ffffff4d}.color-btn-black{background:var(--color-black);color:var(--color-white);border-color:var(--color-gold)}.color-btn-black:hover{background:var(--color-gold);color:var(--color-black);box-shadow:var(--shadow-gold);transform:translateY(-5px)}.piece-icon{font-size:1.5rem}.openings-section{background:var(--gradient-dark);padding:80px 50px}.section-title{font-family:var(--font-display);text-align:center;background:var(--gradient-gold);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:50px;font-size:2.5rem}.openings-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;max-width:1400px;margin:0 auto;display:grid}.back-btn{border:2px solid var(--color-gold);color:var(--color-gold);cursor:pointer;transition:var(--transition-medium);background:0 0;border-radius:10px;justify-content:center;align-items:center;gap:8px;margin:40px auto 0;padding:14px 32px;font-size:1rem;font-weight:600;display:flex}.back-btn:hover{background:var(--color-gold);color:var(--color-black);box-shadow:var(--shadow-gold);transform:translateY(-3px)}.opening-card{background:var(--color-black-light);cursor:pointer;transition:var(--transition-medium);border:1px solid #d4af3733;border-radius:16px;padding:30px;text-decoration:none;position:relative;overflow:hidden}.opening-card:hover{border-color:var(--color-gold);box-shadow:var(--shadow-gold);transform:translateY(-8px)}.opening-name{color:var(--color-gold);margin-bottom:10px;font-size:1.4rem;font-weight:600}.opening-preview{color:var(--color-gray);font-size:.95rem}.opening-detail{max-width:1400px;margin:0 auto;padding:40px 50px}.back-button{color:var(--color-gold);border:1px solid var(--color-gold);transition:var(--transition-medium);cursor:pointer;background:0 0;border-radius:8px;align-items:center;gap:8px;margin-bottom:30px;padding:10px 20px;font-size:1rem;font-weight:500;text-decoration:none;display:inline-flex}.back-button:hover{background:var(--color-gold);color:var(--color-black)}.opening-header{text-align:center;margin-bottom:50px}.opening-title{font-family:var(--font-display);background:var(--gradient-gold);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:10px;font-size:3rem}.opening-content{grid-template-columns:1fr 1fr;align-items:start;gap:50px;display:grid}@media (max-width:1024px){.opening-content{grid-template-columns:1fr}}.chessboard-container{background:var(--color-black-light);border:1px solid #d4af3733;border-radius:16px;padding:30px}.chessboard{border:3px solid var(--color-gold);width:100%;max-width:500px;box-shadow:var(--shadow-gold);border-radius:8px;grid-template-columns:repeat(8,1fr);margin:0 auto;display:grid;overflow:hidden}.square{aspect-ratio:1;transition:var(--transition-fast);justify-content:center;align-items:center;font-size:2.5rem;display:flex;position:relative}.square-light{background:#f0d9b5}.square-dark{background:#b58863}.square.highlight{box-shadow:inset 0 0 0 3px var(--color-gold)}.square.last-move{background:#d4af3766}.moves-section{background:var(--color-black-light);border:1px solid #d4af3733;border-radius:16px;padding:30px}.moves-title{color:var(--color-gold);margin-bottom:20px;font-size:1.5rem;font-weight:600}.moves-list{flex-wrap:wrap;gap:10px;margin-bottom:30px;display:flex}.move-item{background:var(--color-black-lighter);border-radius:8px;align-items:center;gap:8px;padding:8px 16px;font-family:monospace;font-size:1rem;display:flex}.move-number{color:var(--color-gold);font-weight:600}.move-white{color:var(--color-white)}.move-black{color:var(--color-gray-light)}.move-item.active{border:1px solid var(--color-gold);box-shadow:0 0 10px #d4af374d}.opening-explanation{border-left:3px solid var(--color-gold);background:#d4af370d;border-radius:0 12px 12px 0;margin-top:30px;padding:25px}.explanation-title{color:var(--color-gold);margin-bottom:15px;font-size:1.2rem;font-weight:600}.explanation-text{color:var(--color-gray-light);font-size:1rem;line-height:1.8}.move-navigation{justify-content:center;gap:15px;margin-top:20px;display:flex}.nav-btn{background:var(--color-black-lighter);border:1px solid var(--color-gold);color:var(--color-gold);cursor:pointer;transition:var(--transition-medium);border-radius:8px;padding:12px 24px;font-weight:500}.nav-btn:hover:not(:disabled){background:var(--color-gold);color:var(--color-black)}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.about-page{max-width:1200px;margin:0 auto;padding:60px 50px}.about-title{font-family:var(--font-display);text-align:center;background:var(--gradient-gold);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:20px;font-size:3rem}.about-subtitle{text-align:center;color:var(--color-gray);margin-bottom:60px;font-size:1.2rem}.tech-section{margin-bottom:60px}.tech-section-title{color:var(--color-gold);border-bottom:1px solid #d4af374d;margin-bottom:30px;padding-bottom:10px;font-size:1.8rem}.tech-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px;display:grid}.tech-card{background:var(--color-black-light);transition:var(--transition-medium);border:1px solid #d4af3733;border-radius:16px;flex-direction:column;gap:15px;padding:30px;display:flex}.tech-card:hover{border-color:var(--color-gold);box-shadow:var(--shadow-gold);transform:translateY(-5px)}.tech-icon{margin-bottom:10px;font-size:3rem}.tech-name{color:var(--color-white);font-size:1.4rem;font-weight:600}.tech-description{color:var(--color-gray);flex-grow:1;font-size:.95rem;line-height:1.6}.tech-link{color:var(--color-gold);border:1px solid var(--color-gold);transition:var(--transition-medium);text-align:center;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:12px 20px;font-weight:500;text-decoration:none;display:inline-flex}.tech-link:hover{background:var(--color-gold);color:var(--color-black)}.footer{background:var(--color-black-light);text-align:center;border-top:1px solid #d4af3733;padding:40px 50px}.footer-text{color:var(--color-gray);font-size:.95rem}.footer-text span{color:var(--color-gold);font-weight:600}.social-links{justify-content:center;gap:25px;margin-bottom:25px;display:flex}.social-link{background:var(--color-black-lighter);width:45px;height:45px;color:var(--color-gray-light);transition:var(--transition-medium);border:1px solid #d4af374d;border-radius:50%;justify-content:center;align-items:center;display:flex}.social-link:hover{background:var(--color-gold);color:var(--color-black);border-color:var(--color-gold);box-shadow:var(--shadow-gold);transform:translateY(-5px)}.social-icon{width:22px;height:22px}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.6s forwards fadeIn}@media (max-width:768px){.navbar{height:70px;padding:0 20px}.navbar-left{gap:15px}.navbar-logo{font-size:1.4rem}.nav-link{padding:8px 12px;font-size:.85rem}.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.1rem}.color-buttons{flex-direction:column;gap:20px}.color-btn{padding:18px 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50px}.stats-header{text-align:center;margin-bottom:50px}.stats-title{font-family:var(--font-display);background:var(--gradient-gold);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:15px;font-size:3rem}.stats-subtitle{color:var(--color-gray);font-size:1.1rem}.stats-overview{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:50px;display:grid}.overview-card{background:var(--color-black-light);transition:var(--transition-medium);border:1px solid 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24px;font-weight:500}.filter-btn:hover{border-color:var(--color-gold);color:var(--color-gold)}.filter-btn.active{background:var(--color-gold);color:var(--color-black);border-color:var(--color-gold)}.chart-section{margin-bottom:50px}.chart-container{background:var(--color-black-light);border:1px solid #d4af3733;border-radius:16px;padding:30px}.chart-title{color:var(--color-white);margin-bottom:25px;font-size:1.3rem;font-weight:600}.bar-chart{flex-direction:column;gap:15px;display:flex}.bar-item{align-items:center;gap:15px;display:flex}.bar-label{align-items:center;gap:10px;min-width:250px;display:flex}.bar-rank{color:var(--color-gold);min-width:30px;font-weight:700}.bar-name{color:var(--color-white);font-size:.95rem}.bar-wrapper{background:var(--color-black-lighter);border-radius:8px;flex:1;height:32px;overflow:hidden}.bar{border-radius:8px;justify-content:flex-end;align-items:center;height:100%;padding-right:12px;transition:width 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#d4af3733;justify-content:center;gap:30px;margin-top:25px;padding-top:20px;display:flex}.legend-item{color:var(--color-gray-light);align-items:center;gap:8px;font-size:.9rem;display:flex}.legend-color{border-radius:4px;width:20px;height:20px}.legend-color.white-win{background:#f0f0f0}.legend-color.draw{background:#888}.legend-color.black-win{background:#333}.table-section{margin-bottom:50px}.stats-table-container{border:1px solid #d4af3733;border-radius:12px;overflow-x:auto}.stats-table{border-collapse:collapse;background:var(--color-black-light);width:100%}.stats-table th,.stats-table td{text-align:left;border-bottom:1px solid #d4af371a;padding:15px 12px}.stats-table th{background:var(--color-black-lighter);color:var(--color-gold);white-space:nowrap;font-size:.9rem;font-weight:600}.stats-table td{color:var(--color-gray-light);font-size:.9rem}.stats-table tr:hover{background:#d4af370d}.opening-name-cell{min-width:180px;font-weight:500;color:var(--color-white)!important}.white-rate{color:#f0f0f0!important}.black-rate{color:#aaa!important}.difficulty-badge{border-radius:12px;padding:4px 10px;font-size:.75rem;font-weight:600}.difficulty-badge.başlangıç{color:#4caf50;background:#4caf5033}.difficulty-badge.orta{color:#ffc107;background:#ffc10733}.difficulty-badge.i̇leri,.difficulty-badge.ileri{color:#f44336;background:#f4433633}.trend-badge{white-space:nowrap;font-size:.8rem}.trend-badge.up{color:#4caf50}.trend-badge.down{color:#f44336}.trend-badge.stable{color:var(--color-gray)}.concepts-section{margin-bottom:50px}.concepts-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px;display:grid}.concept-card{background:var(--color-black-light);transition:var(--transition-medium);border:1px solid #d4af3733;border-radius:16px;padding:25px}.concept-card:hover{border-color:var(--color-gold)}.concept-title{color:var(--color-gold);margin-bottom:12px;font-size:1.1rem;font-weight:600}.concept-desc{color:var(--color-gray-light);margin-bottom:15px;font-size:.95rem;line-height:1.7}.concept-example{color:var(--color-gray-light);background:#d4af371a;border-radius:8px;padding:12px 15px;font-size:.9rem}@media (max-width:768px){.stats-page{padding:20px}.stats-title{font-size:2rem}.bar-label{min-width:150px}.bar-name{font-size:.8rem}.top-opening-stats{flex-direction:column;gap:20px}.stats-table{font-size:.8rem}.stats-table th,.stats-table td{padding:10px 8px}}.data-source{flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;margin-top:20px;display:flex}.source-badge{border:1px solid var(--color-gold);color:var(--color-gold);background:#d4af371a;border-radius:20px;align-items:center;gap:8px;padding:8px 16px;font-size:.9rem;font-weight:500;display:inline-flex}.source-badge svg{width:16px;height:16px}.last-updated{color:var(--color-gray);font-size:.85rem}.loading-container{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:80px 20px;display:flex}.loading-spinner{border:4px solid var(--color-black-lighter);border-top:4px solid var(--color-gold);border-radius:50%;width:60px;height:60px;margin-bottom:25px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-text{color:var(--color-white);margin-bottom:10px;font-size:1.2rem;font-weight:500}.loading-subtext{color:var(--color-gray);font-size:.95rem}.error-container{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:60px 20px;display:flex}.error-text{color:#f44336;margin-bottom:20px;font-size:1.1rem}.retry-btn{background:var(--color-gold);color:var(--color-black);cursor:pointer;transition:var(--transition-medium);border:none;border-radius:8px;padding:12px 30px;font-weight:600}.retry-btn:hover{box-shadow:var(--shadow-gold);transform:translateY(-2px)}.eco-code{color:var(--color-gold);background:#d4af3733;border-radius:12px;margin-bottom:20px;padding:4px 12px;font-size:.85rem;font-weight:500;display:inline-block}.bar-eco{color:var(--color-gold);opacity:.7;margin-left:8px;font-size:.8rem}.eco-cell{font-weight:500;color:var(--color-gold)!important}.rank-cell{font-weight:700;color:var(--color-gold)!important}.attribution-section{margin-top:30px;margin-bottom:30px}.attribution-card{text-align:center;background:#d4af370d;border:1px solid #d4af3733;border-radius:12px;padding:20px}.attribution-card p{color:var(--color-gray-light);font-size:.95rem}.attribution-card a{color:var(--color-gold);transition:var(--transition-fast);font-weight:600;text-decoration:none}.attribution-card a:hover{text-decoration:underline}.variations-section{border-top:1px solid #d4af3733;margin-top:60px;padding-top:40px}.variations-title{color:var(--color-gold);align-items:center;gap:15px;margin-bottom:30px;font-size:1.8rem;display:flex}.variations-count{color:var(--color-gold);background:#d4af3733;border-radius:12px;padding:4px 12px;font-size:.9rem;font-weight:500}.variations-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;display:grid}.variation-card{background:var(--color-black-light);cursor:pointer;transition:var(--transition-medium);border:1px solid #d4af3733;border-radius:16px;padding:20px}.variation-card:hover{border-color:var(--color-gold);transform:translateY(-3px);box-shadow:0 8px 25px #d4af3726}.variation-card.expanded{border-color:var(--color-gold)}.variation-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:15px;display:flex}.variation-name{color:var(--color-white);font-size:1.15rem;font-weight:600}.variation-badges{flex-wrap:wrap;gap:8px;display:flex}.variation-badge{border-radius:10px;padding:4px 10px;font-size:.75rem;font-weight:600}.variation-moves{margin-bottom:12px}.variation-moves code{background:var(--color-black-lighter);color:var(--color-gray-light);white-space:nowrap;border-radius:8px;padding:12px 15px;font-family:Courier New,monospace;font-size:.9rem;display:block;overflow-x:auto}.variation-details{max-height:0;transition:max-height .3s,padding .3s;overflow:hidden}.variation-details.show{max-height:200px;padding-top:15px;padding-bottom:5px}.variation-description{color:var(--color-gray-light);border-left:3px solid var(--color-gold);background:#d4af370d;border-radius:0 8px 8px 0;padding:15px;font-size:.95rem;line-height:1.7}.variation-expand-hint{text-align:center;color:var(--color-gray);transition:var(--transition-fast);margin-top:10px;font-size:.8rem}.variation-card:hover .variation-expand-hint{color:var(--color-gold)}@media (max-width:768px){.variations-grid{grid-template-columns:1fr}.variation-header{flex-direction:column;align-items:flex-start}.variations-title{flex-direction:column;align-items:flex-start;gap:10px;font-size:1.4rem}}.lichess-btn{border:2px solid var(--color-gold);color:var(--color-gold);cursor:pointer;transition:var(--transition-medium);background:0 0;border-radius:10px;align-items:center;gap:10px;margin-top:15px;padding:12px 24px;font-size:.95rem;font-weight:600;display:inline-flex}.lichess-btn:hover{background:var(--color-gold);color:var(--color-black);box-shadow:var(--shadow-gold);transform:translateY(-2px)}.lichess-btn svg{transition:var(--transition-fast)}.lichess-btn:hover svg{transform:scale(1.1)}.footer-credit{color:var(--color-gray);margin-top:8px;font-size:.85rem}.footer-credit a{color:var(--color-gold);transition:var(--transition-fast);font-weight:500;text-decoration:none}.footer-credit a:hover{text-decoration:underline}