:root{--primary-color:#333;--secondary-color:#666;--accent-color:#999;--light-gray:#f5f5f5;--medium-gray:#ddd;--dark-gray:#222;--success-color:#444;}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:#333;background-color:#f8f8f8;padding:0;margin:0;}
.container{max-width:1400px;margin:0 auto;padding:20px;}
header{background:var(--dark-gray);color:white;padding:1rem 0;box-shadow:0 4px 6px rgba(0,0,0,0.1);}
.header-content{display:flex;justify-content:space-between;align-items:center;max-width:1400px;margin:0 auto;padding:0 20px;}
.logo{font-size:1.8rem;font-weight:bold;display:flex;align-items:center;}
.logo span{display:inline-block;width:8px;height:8px;background-color:white;margin:0 2px;}
nav ul{display:flex;list-style:none;}
nav ul li{margin-left:1.5rem;}
nav ul li a{color:white;text-decoration:none;font-weight:500;transition:opacity 0.3s;}
nav ul li a:hover{opacity:0.8;}
.main-content{display:grid;grid-template-columns:250px 1fr;gap:20px;margin-top:20px;}
.sidebar{background-color:white;border-radius:8px;padding:20px;box-shadow:0 4px 6px rgba(0,0,0,0.05);border:1px solid var(--medium-gray);}
.sidebar h3{margin-bottom:15px;color:var(--dark-gray);border-bottom:1px solid var(--medium-gray);padding-bottom:8px;}
.char-set-selector{margin-bottom:20px;}
.char-set-buttons{display:flex;flex-direction:column;gap:8px;}
.char-set-btn{padding:8px 12px;background-color:var(--light-gray);border:1px solid var(--medium-gray);border-radius:4px;text-align:left;cursor:pointer;transition:background-color 0.3s;}
.char-set-btn:hover{background-color:var(--medium-gray);}
.char-set-btn.active{background-color:var(--dark-gray);color:white;}
.content-area{background-color:white;border-radius:8px;padding:20px;box-shadow:0 4px 6px rgba(0,0,0,0.05);border:1px solid var(--medium-gray);}
.content-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;}
.content-header h2{color:var(--dark-gray);}
.char-grid-container{display:block;}
.char-set-section{margin-bottom:30px;}
.char-set-title{font-size:1.2rem;margin-bottom:15px;color:var(--dark-gray);border-bottom:1px solid var(--medium-gray);padding-bottom:8px;}
.char-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:0px;}
.char-item{background:white;border:1px solid var(--medium-gray);border-radius:0px;aspect-ratio:1;display:flex;flex-direction:column;justify-content:center;align-items:center;cursor:pointer;transition:all 0.3s;padding:8px;}
.char-item:hover{border-color:var(--dark-gray);transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,0.1);}
.pixel-preview{display:grid;grid-template-columns:repeat(5,1fr);gap:2px;margin-bottom:8px;width:100%;}
.pixel{aspect-ratio:1;background-color:var(--light-gray);border:1px solid var(--medium-gray);}
.pixel.active{background-color:var(--dark-gray);}
.char-display{font-size:14px;margin-top:5px;color:var(--dark-gray);}
.char-unicode{font-size:10px;color:var(--secondary-color);margin-top:3px;}
.action-buttons{display:flex;gap:10px;justify-content:flex-end;}
.btn{padding:10px 20px;border:none;border-radius:4px;font-weight:500;cursor:pointer;transition:all 0.3s;}
.btn-primary{background-color:var(--dark-gray);color:white;}
.btn-primary:hover{background-color:var(--secondary-color);}
.btn-secondary{background-color:var(--light-gray);color:var(--dark-gray);border:1px solid var(--medium-gray);}
.btn-secondary:hover{background-color:var(--medium-gray);}
.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.5);display:flex;justify-content:center;align-items:center;z-index:1000;opacity:0;visibility:hidden;transition:all 0.3s;}
.modal.active{opacity:1;visibility:visible;}
.modal-content{background-color:white;border-radius:8px;width:90%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:0 10px 25px rgba(0,0,0,0.2);transform:translateY(-20px);transition:transform 0.3s;border:1px solid var(--medium-gray);}
.modal.active .modal-content{transform:translateY(0);}
.modal-header{padding:15px 20px;border-bottom:1px solid var(--medium-gray);display:flex;justify-content:space-between;align-items:center;background:var(--light-gray);}
.modal-title{font-size:1.2rem;color:var(--dark-gray);}
.close-modal{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--dark-gray);}
.modal-body{padding:20px;}
.style-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:15px;margin:15px 0;}
.style-item{border:2px solid var(--medium-gray);border-radius:6px;padding:10px;text-align:center;cursor:pointer;transition:all 0.2s;}
.style-item:hover{border-color:var(--dark-gray);}
.style-item.selected{border-color:var(--success-color);background-color:rgba(68,68,68,0.1);}
.pixel-canvas{display:grid;grid-template-columns:repeat(5,1fr);gap:2px;margin:15px auto;max-width:200px;}
.custom-editor{text-align:center;}
.editor-controls{display:flex;justify-content:center;gap:10px;margin-top:15px;}
.auth-tabs{display:flex;margin-bottom:20px;}
.auth-tab{flex:1;padding:10px;text-align:center;background-color:var(--light-gray);cursor:pointer;border:1px solid var(--medium-gray);}
.auth-tab.active{background-color:var(--dark-gray);color:white;}
.auth-form{display:none;}
.auth-form.active{display:block;}
.form-group{margin-bottom:15px;}
.form-group label{display:block;margin-bottom:5px;font-weight:500;color:var(--dark-gray);}
.form-group input{width:100%;padding:10px;border:1px solid var(--medium-gray);border-radius:4px;background:var(--light-gray);}
footer{text-align:center;margin-top:40px;padding:20px 0;color:var(--dark-gray);border-top:1px solid var(--medium-gray);}
@media (max-width:968px){.main-content{grid-template-columns:1fr;}
.char-grid-container{grid-template-columns:1fr;}
.sidebar{margin-bottom:20px;}
}
@media (max-width:768px){.char-grid{grid-template-columns:repeat(auto-fill,minmax(70px,1fr));}
}