*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

:root{
    --bg:#0f172a;
    --panel:#111827;
    --panel-light:#1f2937;
    --primary:#6366f1;
    --primary-hover:#4f46e5;
    --text:#f8fafc;
    --muted:#94a3b8;
    --border:#334155;
    --glass:rgba(255,255,255,0.05);
}

body{
    font-family:Inter,Segoe UI,sans-serif;
    background:linear-gradient(135deg,#0f172a,#111827,#1e293b);
    color:var(--text);
    height:100vh;
    overflow:hidden;
}

/* HEADER */

header{
    height:72px;
    background:rgba(15,23,42,0.8);
    backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(255,255,255,0.08);

    display:flex;
    align-items:center;
    justify-content:space-between;

    padding:0 28px;
}

header h1{
    font-size:24px;
    font-weight:700;
    letter-spacing:1px;
}

header p{
    color:var(--muted);
    font-size:14px;
}

.back-btn{
  text-decoration:none;
  color:white;
  padding:14px 22px;
  border-radius:16px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  font-weight:600;
  transition:.3s ease;
  box-shadow:var(--shadow);
}

.back-btn:hover{
  transform:translateY(-3px);
}

.download-btn{
    background:linear-gradient(135deg,var(--primary),#8b5cf6);
    border:none;
    color:white;
    padding:12px 18px;
    border-radius:12px;
    cursor:pointer;
    font-weight:600;
    transition:0.3s;
}

.download-btn:hover{
    transform:translateY(-2px);
    opacity:0.9;
}

/* LAYOUT */

.app{
    display:grid;
    grid-template-columns:350px 1fr;
    height:calc(100vh - 72px);
}

/* SIDEBAR */

.sidebar{
    background:rgba(17,24,39,0.85);
    backdrop-filter:blur(14px);
    border-right:1px solid rgba(255,255,255,0.08);
    overflow-y:auto;
}

/* TABS */

.tabs{
    display:flex;
    border-bottom:1px solid var(--border);
}

.tab-btn{
    flex:1;
    padding:16px;
    background:none;
    border:none;
    color:var(--muted);
    cursor:pointer;
    font-weight:600;
    transition:0.3s;
}

.tab-btn.active{
    background:var(--glass);
    color:white;
    border-bottom:2px solid var(--primary);
}

.tab-content{
    display:none;
    padding:24px;
}

.tab-content.active{
    display:block;
}

/* CONTROLS */

.control-group{
    margin-bottom:24px;
}

.control-group h3{
    margin-bottom:16px;
    font-size:18px;
}

label{
    display:block;
    margin-bottom:6px;
    color:var(--muted);
    font-size:14px;
}

input,
select{
    width:100%;
    padding:12px;
    border-radius:12px;
    border:1px solid var(--border);
    background:var(--panel-light);
    color:white;
    margin-bottom:14px;
    outline:none;
}

input[type="range"]{
    padding:0;
}

button{
    background:linear-gradient(135deg,var(--primary),#8b5cf6);
    border:none;
    color:white;
    padding:12px 16px;
    border-radius:12px;
    cursor:pointer;
    font-weight:600;
    transition:0.3s;
}

button:hover{
    transform:translateY(-2px);
}

/* PREVIEW */

.preview{
    display:flex;
    align-items:center;
    justify-content:center;
    position:relative;
}

.canvas{
    width:500px;
    height:500px;
    background:white;
    border:4px solid transparent;
    border-radius:24px;
    position:relative;
    overflow:hidden;

    box-shadow:
    0 25px 50px rgba(0,0,0,0.45);
}

/* SHAPE */

.shape{
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
}

/* TEXT */

.logo-text{
    position:absolute;
    user-select:none;
    cursor:move;
    transform:translate(-50%,-50%);
}

/* SYMBOL */

.symbol{
    position:absolute;
    cursor:move;
    user-select:none;
    transform:translate(-50%,-50%);
}

/* SYMBOL CARD */

.symbol-card{
    background:rgba(255,255,255,0.04);
    border:1px solid rgba(255,255,255,0.06);
    padding:14px;
    border-radius:16px;
    margin-bottom:16px;
}

.symbol-card h4{
    margin-bottom:10px;
}

/* SCROLLBAR */

::-webkit-scrollbar{
    width:8px;
}

::-webkit-scrollbar-thumb{
    background:#374151;
    border-radius:20px;
}