:root{--bg: #121213;--text: #ffffff;--border: #3a3a3c;--correct: #538d4e;--present: #b59f3b;--absent: #3a3a3c;--key-bg: #818384;--modal-bg: #1a1a1b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}#app{width:100%;max-width:500px;margin:0 auto;display:flex;flex-direction:column;min-height:100vh;padding:0 16px}header{display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border);padding:16px 0;position:relative}.logo-container{display:flex;align-items:center;gap:8px}.logo{font-size:32px;font-weight:700;font-family:Times New Roman,serif;font-style:italic}h1{font-size:32px;font-weight:700;letter-spacing:.05em}.help-btn{position:absolute;right:0;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;padding:8px;width:auto;display:flex;align-items:center;justify-content:center}.help-btn:hover{opacity:.7}.auth-btn{position:absolute;left:0;background:none;border:none;color:var(--text);font-size:20px;cursor:pointer;padding:8px;width:auto;display:flex;align-items:center;justify-content:center}.auth-btn:hover{opacity:.7}.auth-btn svg{display:block}.hint-btn{background:var(--present);margin-top:8px;display:flex;align-items:center;justify-content:center;gap:8px}.hint-btn svg{flex-shrink:0}.hint-btn:disabled{background:var(--absent)}main{flex:1;display:flex;flex-direction:column;padding:16px 0;max-width:100%}#game-board{display:flex;flex-direction:column;gap:5px;margin-bottom:20px}.guess-row{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}.cell{aspect-ratio:1;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:clamp(16px,4vw,28px);font-weight:700;transition:all .3s ease;border-radius:2px}.cell.revealed{background:#565758;border-color:#565758;color:#fff}.cell.correct{background:var(--correct);border-color:var(--correct);color:#fff}.cell.present{background:var(--present);border-color:var(--present);color:#fff}.cell.absent{background:var(--absent);border-color:var(--absent);color:#fff}#input-section{margin:20px 0}.input-row{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-bottom:12px;max-width:100%}.sequence-input{padding:12px 4px;font-size:clamp(16px,4vw,20px);text-align:center;background:var(--bg);color:var(--text);border:2px solid var(--border);border-radius:2px;font-weight:700;width:100%;font-variant-numeric:tabular-nums;min-width:0}.sequence-input:focus{outline:none;border-color:var(--key-bg)}.sequence-input::-webkit-outer-spin-button,.sequence-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.sequence-input[type=number]{-moz-appearance:textfield}button{width:100%;padding:14px;font-size:16px;font-weight:700;background:var(--key-bg);color:var(--text);border:none;border-radius:4px;cursor:pointer;transition:opacity .2s;text-transform:uppercase;letter-spacing:.05em}button:hover:not(:disabled){opacity:.8}button:disabled{opacity:.5;cursor:not-allowed}#message{text-align:center;margin:16px 0;font-size:16px;min-height:24px;font-weight:500}.error{color:#ff6b6b}.success{color:var(--correct)}.info{color:var(--key-bg)}#stats{text-align:center;margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:#000c;animation:fadeIn .2s ease}.modal.active{display:flex;align-items:center;justify-content:center}.modal-content{background-color:var(--modal-bg);padding:24px;border-radius:8px;max-width:500px;width:90%;max-height:90vh;overflow-y:auto;position:relative;animation:slideIn .3s ease}.close-btn{position:absolute;right:16px;top:16px;font-size:28px;font-weight:700;color:var(--text);background:none;border:none;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center}.modal-content h2{margin-bottom:16px;font-size:24px}.modal-content h3{margin-top:20px;margin-bottom:12px;font-size:18px}.modal-content p{margin-bottom:12px;line-height:1.6;color:#d7dadc}.example-row{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;margin:12px 0}.example-cell{aspect-ratio:1;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;border-radius:2px}.auth-form{display:flex;flex-direction:column;gap:12px}.auth-form input{padding:12px;background:var(--bg);color:var(--text);border:2px solid var(--border);border-radius:4px;font-size:14px}.auth-form input:focus{outline:none;border-color:var(--key-bg)}.auth-divider{text-align:center;margin:16px 0;color:var(--key-bg)}.google-btn{background:#4285f4;display:flex;align-items:center;justify-content:center;gap:8px}.google-btn svg{flex-shrink:0}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:20px 0}.stat-item{text-align:center}.stat-value{font-size:32px;font-weight:700;color:var(--correct)}.stat-label{font-size:12px;color:var(--key-bg);margin-top:4px}.leaderboard-list{list-style:none;margin-top:16px}.leaderboard-item{display:flex;justify-content:space-between;padding:12px;border-bottom:1px solid var(--border)}.user-info{display:flex;align-items:center;gap:8px}.rank{font-weight:700;color:var(--present)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{transform:translateY(-50px);opacity:0}to{transform:translateY(0);opacity:1}}@media(max-width:480px){h1,.logo{font-size:28px}.cell{font-size:20px}.sequence-input{padding:10px 6px;font-size:18px}.modal-content{padding:20px}}@media(max-width:360px){h1,.logo{font-size:24px}.cell{font-size:18px}.sequence-input{padding:8px 4px;font-size:16px}}.landing-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.landing-content{max-width:500px;width:100%;text-align:center}.landing-header{margin-bottom:48px}.landing-logo{font-size:72px;font-weight:700;font-family:Times New Roman,serif;font-style:italic;display:block;margin-bottom:16px}.landing-title{font-size:48px;font-weight:700;letter-spacing:.05em;margin-bottom:12px}.landing-subtitle{font-size:18px;color:var(--key-bg)}.landing-actions{display:flex;flex-direction:column;gap:12px;margin-bottom:48px}.primary-btn{background:var(--correct);color:#fff;padding:16px 32px;font-size:18px;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:opacity .2s;text-transform:uppercase;letter-spacing:.05em}.primary-btn:hover{opacity:.9}.secondary-btn{background:transparent;color:var(--text);padding:14px 32px;font-size:16px;font-weight:600;border:2px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s}.secondary-btn:hover{border-color:var(--key-bg);background:#8183841a}.landing-info{display:flex;flex-direction:column;gap:20px;text-align:left}.info-item{display:flex;align-items:center;gap:16px;padding:16px;background:#3a3a3c4d;border-radius:8px}.info-icon{flex-shrink:0;color:var(--key-bg)}.info-item p{margin:0;color:var(--text);font-size:14px;line-height:1.5}.auth-divider a{color:var(--key-bg);text-decoration:none;font-size:14px}.auth-divider a:hover{color:var(--text)}@media(max-width:480px){.landing-logo{font-size:56px}.landing-title{font-size:36px}.landing-subtitle{font-size:16px}.primary-btn{font-size:16px;padding:14px 24px}.secondary-btn{font-size:14px;padding:12px 24px}.info-icon{width:20px;height:20px}.info-item p{font-size:13px}}.solution-info{margin-top:20px;padding:20px;background:#3a3a3c4d;border-radius:8px;text-align:left}.solution-sequence{margin-bottom:12px;font-size:16px;line-height:1.6}.solution-rule{font-size:15px;line-height:1.6;color:var(--present)}.solution-sequence strong,.solution-rule strong{color:var(--text);display:block;margin-bottom:4px}@media(max-width:480px){.solution-info{padding:16px}.solution-sequence,.solution-rule{font-size:14px}}