@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root{
  --primary:#8B5CF6;--secondary:#A78BFA;--accent:#06B6D4;
  --bg:#0F0F1A;--surface:#1A1A2E;--surface2:#25253E;
  --text:#E8E8F0;--text-dim:#8888A8;--border:#2A2A44;
  --success:#22C55E;--warning:#FBBF24;--error:#EF4444;
  --radius:12px;--font:'Inter',system-ui,sans-serif;
}

html{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6}
body{min-height:100vh;display:flex;flex-direction:column}

.header{padding:1rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--border);flex-wrap:wrap}
.header-left{display:flex;align-items:center;gap:.75rem}
.header h1{font-size:1.05rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.header p{font-size:.72rem;color:var(--text-dim)}
.header-actions{display:flex;gap:.35rem;flex-wrap:wrap}

.btn{padding:.38rem .75rem;border-radius:var(--radius);font-size:.75rem;font-weight:600;cursor:pointer;border:none;transition:all .2s;display:inline-flex;align-items:center;gap:.3rem;font-family:var(--font)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(139,92,246,.25)}
.btn-ghost{background:transparent;color:var(--text-dim);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
.btn-sm{padding:.28rem .55rem;font-size:.7rem}

/* Layout */
.layout{display:grid;grid-template-columns:1fr 280px;gap:1rem;flex:1;max-width:1100px;width:100%;margin:0 auto;padding:1rem}

/* Editor */
.editor-wrap{display:flex;flex-direction:column;gap:.75rem}
.editor-tabs{display:flex;gap:2px;border-radius:8px;overflow:hidden;border:1px solid var(--border)}
.editor-tab{padding:.35rem .7rem;font-size:.72rem;font-weight:600;border:none;background:transparent;color:var(--text-dim);cursor:pointer;font-family:var(--font)}
.editor-tab.active{background:var(--primary);color:#fff}

.editor-area{flex:1}
.editor-area textarea{width:100%;min-height:300px;padding:.85rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-family:'Courier New',monospace;font-size:.82rem;resize:vertical;outline:none;line-height:1.7;transition:border-color .2s}
.editor-area textarea:focus{border-color:var(--primary)}

.editor-stats{display:flex;gap:1rem;font-size:.7rem;color:var(--text-dim);flex-wrap:wrap;margin-top:.3rem}
.editor-stats span{font-weight:700;color:var(--accent)}

/* Variable highlight */
.var-highlight{background:rgba(139,92,246,.1);color:var(--primary);padding:0 .15rem;border-radius:3px;font-weight:600}

/* Sidebar */
.sidebar{display:flex;flex-direction:column;gap:.75rem;overflow-y:auto;max-height:calc(100vh-100px)}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.75rem}
.panel h3{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-dim);margin-bottom:.5rem}

/* Variables */
.var-list{display:flex;flex-direction:column;gap:.3rem}
.var-item{display:flex;gap:.3rem;align-items:center}
.var-item .var-name{font-size:.72rem;font-weight:700;color:var(--primary);min-width:70px}
.var-item input{flex:1;padding:.25rem .4rem;border-radius:6px;border:1px solid var(--border);background:var(--surface2);color:var(--text);font-size:.72rem;outline:none;font-family:var(--font)}
.var-item input:focus{border-color:var(--primary)}

/* Token counts */
.token-grid{display:grid;grid-template-columns:1fr 1fr;gap:.3rem}
.token-item{text-align:center;padding:.3rem;border-radius:6px;background:var(--surface2)}
.token-item .num{font-size:.95rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.token-item .label{font-size:.55rem;color:var(--text-dim);text-transform:uppercase}

/* Version history */
.version-list{display:flex;flex-direction:column;gap:.25rem;max-height:150px;overflow-y:auto}
.version-item{display:flex;justify-content:space-between;align-items:center;padding:.3rem .4rem;border-radius:6px;cursor:pointer;font-size:.7rem;transition:background .15s}
.version-item:hover{background:var(--surface2)}
.version-item .ver-time{color:var(--text-dim)}
.version-item .ver-len{font-weight:600;color:var(--accent)}

/* Library */
.lib-list{display:flex;flex-direction:column;gap:.25rem;max-height:120px;overflow-y:auto}
.lib-item{padding:.3rem .4rem;border-radius:6px;cursor:pointer;font-size:.7rem;color:var(--text-dim);transition:all .15s}
.lib-item:hover{background:var(--surface2);color:var(--text)}
.lib-item .lib-cat{font-size:.6rem;color:var(--primary)}

/* Compare */
.compare-view{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;margin-top:.75rem}
.compare-pane{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.75rem}
.compare-pane h4{font-size:.72rem;font-weight:700;margin-bottom:.3rem;color:var(--primary)}
.compare-pane pre{font-size:.72rem;color:var(--text-dim);white-space:pre-wrap;word-break:break-word;font-family:'Courier New',monospace}

.toast{position:fixed;bottom:2rem;right:2rem;background:var(--surface);border:1px solid var(--primary);color:var(--primary);padding:.5rem 1rem;border-radius:var(--radius);font-size:.78rem;font-weight:500;z-index:200;transform:translateY(100px);opacity:0;transition:all .3s}
.toast.show{transform:translateY(0);opacity:1}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:768px){.layout{grid-template-columns:1fr;padding:.75rem}.compare-view{grid-template-columns:1fr}}