/* ─── Variables ─────────────────────────────── */
:root {
  --bg:#07080f; --panel:#0d0e1c; --panel2:#0f1020; --border:#1c1e34; --border2:#25284050;
  --text:#c4c9e8; --text-dim:#8890b8; --text-bright:#e8eaf6;
  --accent:#8b7cf8; --accent2:#67e8f9; --accent-glow:rgba(139,124,248,.15);
  --radius:9px; --ui:'DM Mono',monospace; --fg2:#8890b8;
}
body.light {
  --bg:#f0f2f8; --panel:#ffffff; --panel2:#e8eaf2; --border:#d0d3e8; --border2:#c8cbe080;
  --text:#3a3d60; --text-dim:#3d4050; --text-bright:#1a1d40;
  --accent:#4e44a8; --accent2:#06b6d4; --accent-glow:rgba(107,92,231,.12); --fg2:#3d4050;
}
body.light select option { background:#ffffff; }
body.light #preview-wrap { background-image: radial-gradient(circle at 25% 30%,rgba(107,92,231,.05),transparent 55%), radial-gradient(circle at 75% 70%,rgba(6,182,212,.04),transparent 55%); }
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;font-family:var(--ui);font-size:12px;background:var(--bg);color:var(--text)}
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#25284080;border-radius:2px}
/* ─── Layout ─────────────────────────────────── */
#app{display:flex;flex-direction:column;height:100vh}
#header{display:flex;align-items:center;justify-content:space-between;padding:0 18px;height:46px;border-bottom:1px solid var(--border);background:var(--panel);flex-shrink:0;z-index:10}
#main{display:flex;flex:1;overflow:hidden;min-height:0}
/* ─── Settings ───────────────────────────────── */
#settings-panel{width:280px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;overflow-x:hidden;padding-bottom:40px}
.section{padding:14px 14px 6px}
.section+.section{border-top:1px solid var(--border)}
.section-title{font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim);margin-bottom:11px;padding-left:1px}
.field{margin-bottom:11px}
.field-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px;color:var(--text-dim);font-size:10.5px}
.field-value{color:var(--accent)}
/* ─── Editor + Preview ───────────────────────── */
#editor-panel,#preview-panel{display:flex;flex-direction:column;overflow:hidden;min-width:0;flex-shrink:0}
#editor-panel{border-right:1px solid var(--border)}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;border-bottom:1px solid var(--border);background:var(--panel);flex-shrink:0}
.panel-title{font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-dim)}
#code-editor-wrap{flex:1;position:relative;overflow:hidden;min-height:0}
#code-input,#code-highlight{position:absolute;top:0;left:0;right:0;bottom:0;width:100%;height:100%;padding:18px;font-family:'JetBrains Mono','Fira Code',monospace;font-size:13px;line-height:1.65;tab-size:2;white-space:pre;word-wrap:normal;box-sizing:border-box;margin:0;border:none;overflow:auto}
#code-input{background:transparent;color:transparent;caret-color:#abb2bf;resize:none;outline:none;z-index:2}
#code-highlight{pointer-events:none;overflow:hidden;z-index:1}
#code-input::placeholder{color:#3a3d60;font-size:12px}
#preview-wrap{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:20px;background:var(--bg);background-image:radial-gradient(circle at 25% 30%,rgba(139,124,248,.04),transparent 55%),radial-gradient(circle at 75% 70%,rgba(103,232,249,.03),transparent 55%)}
#preview-canvas{display:block;box-shadow:0 4px 40px rgba(0,0,0,.5)}
/* ─── Resize handle ─────────────────────────── */
#resize-handle{width:5px;flex-shrink:0;background:var(--border);cursor:col-resize;position:relative;transition:background .15s;user-select:none}
#resize-handle:hover,#resize-handle.drag{background:var(--accent)}
#resize-handle::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);height:28px;border-left:1px solid currentColor;opacity:.4}
/* ─── Inputs ─────────────────────────────────── */
select{appearance:none;width:100%;background:var(--panel2);border:1px solid var(--border2);color:var(--text);padding:7px 26px 7px 9px;border-radius:6px;font-family:var(--ui);font-size:11px;cursor:pointer;transition:border-color .15s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%23505578'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 9px center}
select:focus,select:hover{border-color:var(--accent);outline:none}
select option{background:#161726}
input[type=range]{-webkit-appearance:none;width:100%;height:2px;background:var(--border2);border-radius:1px;outline:none;cursor:pointer}
input[type=range]:hover{background:#35375a}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:var(--accent);cursor:pointer;transition:transform .12s,box-shadow .12s}
input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.3);box-shadow:0 0 0 4px var(--accent-glow)}
input[type=range]::-moz-range-thumb{width:12px;height:12px;border:none;border-radius:50%;background:var(--accent)}
input[type=color]{-webkit-appearance:none;width:30px;height:28px;border-radius:6px;border:1px solid var(--border2);padding:2px;background:var(--panel2);cursor:pointer;transition:border-color .15s}
input[type=color]:hover{border-color:var(--accent)}
input[type=color]::-webkit-color-swatch-wrapper{padding:0;border-radius:4px;overflow:hidden}
input[type=color]::-webkit-color-swatch{border:none}
/* ─── Buttons ────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:5px;padding:6px 13px;border-radius:6px;border:1px solid var(--border2);background:var(--panel2);color:var(--text);font-family:var(--ui);font-size:11px;cursor:pointer;transition:all .14s;letter-spacing:.03em;white-space:nowrap}
.btn:hover{border-color:var(--accent);color:var(--text-bright);background:var(--accent-glow)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:#9d8ffa;border-color:#9d8ffa;color:#fff}
/* ─── Split buttons ──────────────────────────── */
.btn-split{position:relative;display:inline-flex}
.btn-split>.btn:first-child{border-radius:6px 0 0 6px;border-right:none}
.btn-split-caret{padding:6px 8px;border-radius:0 6px 6px 0;font-size:9px;line-height:1}
.btn-dropdown{display:none;position:absolute;top:calc(100% + 5px);right:0;min-width:130px;background:var(--panel);border:1px solid var(--border2);border-radius:7px;padding:4px;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.45)}
.btn-dropdown.open{display:block}
.dropdown-item{display:block;width:100%;padding:6px 10px;background:none;border:none;color:var(--text);font-family:var(--ui);font-size:11px;text-align:left;cursor:pointer;border-radius:5px;letter-spacing:.03em;white-space:nowrap}
.dropdown-item:hover{background:var(--accent-glow);color:var(--text-bright)}
/* ─── Toggle group ───────────────────────────── */
.toggle-group{display:flex;gap:4px;flex-wrap:wrap}
.toggle-btn{padding:4px 9px;border-radius:5px;border:1px solid var(--border2);background:var(--panel2);color:var(--text-dim);font-family:var(--ui);font-size:10px;cursor:pointer;transition:all .13s;letter-spacing:.04em}
.toggle-btn.active,.toggle-btn:hover{border-color:var(--accent);color:var(--text-bright);background:var(--accent-glow)}
.toggle-btn.active{background:rgba(139,124,248,.22)}
/* ─── Switch ─────────────────────────────────── */
.switch{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;color:var(--text-dim);font-size:11px}
.switch-track{width:30px;height:16px;border-radius:8px;background:var(--border2);position:relative;transition:background .18s;flex-shrink:0}
.switch-track::after{content:'';position:absolute;width:11px;height:11px;border-radius:50%;background:#fff;top:2.5px;left:2.5px;transition:transform .18s}
.switch.on .switch-track{background:var(--accent)}
.switch.on .switch-track::after{transform:translateX(14px)}
/* ─── Color row ──────────────────────────────── */
.color-row{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.color-label{color:var(--text-dim);font-size:11px;flex:1}
/* ─── Theme grid ─────────────────────────────── */
.theme-grid{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.theme-btn{display:flex;flex-direction:column;gap:4px;padding:7px 7px 6px;border-radius:7px;border:1px solid var(--border);background:var(--panel2);cursor:pointer;transition:all .14s;text-align:left;width:100%}
.theme-btn:hover{border-color:var(--border2)}
.theme-btn.active{border-color:var(--accent);background:var(--accent-glow)}
.theme-swatches{display:flex;gap:3px}
.theme-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.theme-name{font-family:var(--ui);font-size:9px;color:var(--text-dim);letter-spacing:.04em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.theme-btn.active .theme-name{color:var(--text)}
/* ─── Chrome style grid ──────────────────────── */
.chrome-grid{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.chrome-btn{display:flex;flex-direction:column;gap:4px;padding:8px 7px 6px;border-radius:7px;border:1px solid var(--border);background:var(--panel2);cursor:pointer;transition:all .14s;width:100%;text-align:left}
.chrome-btn:hover{border-color:var(--border2)}
.chrome-btn.active{border-color:var(--accent);background:var(--accent-glow)}
.chrome-preview{height:16px;border-radius:3px 3px 0 0;background:#1e2030;display:flex;align-items:center;padding:0 4px;gap:3px;position:relative}
.chrome-preview.win-prev{flex-direction:row-reverse;gap:1px;padding:0 2px}
.chrome-btn.active .chrome-preview{background:#252840}
.c-dot{width:5px;height:5px;border-radius:50%}
.c-btn{width:10px;height:10px;display:flex;align-items:center;justify-content:center;font-size:6px;color:rgba(255,255,255,.5)}
.c-btn.x{background:#c42b1c;border-radius:1px;color:#fff}
.c-title{position:absolute;left:50%;transform:translateX(-50%);font-size:7px;color:rgba(255,255,255,.4);font-family:sans-serif;white-space:nowrap}
.chrome-name{font-family:var(--ui);font-size:9px;color:var(--text-dim);letter-spacing:.04em}
.chrome-btn.active .chrome-name{color:var(--text)}
/* ─── Gradient presets ───────────────────────── */
.gradient-presets{display:flex;gap:5px;flex-wrap:wrap;margin-bottom:8px}
.grad-preset{width:30px;height:18px;border-radius:4px;border:1px solid transparent;cursor:pointer;transition:border-color .13s,transform .1s}
.grad-preset:hover,.grad-preset.active{border-color:var(--accent);transform:scale(1.1)}
/* ─── Image effects ────────────────────────────── */
.filter-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;}
.filter-btn{background:none;border:2px solid transparent;border-radius:6px;padding:2px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;transition:border-color .15s;}
.filter-btn:hover{border-color:rgba(255,255,255,.25);}
.filter-btn.active{border-color:var(--accent, #7c6af7);}
.filter-preview{width:100%;aspect-ratio:1;border-radius:4px;}
.filter-name{font-size:8px;color:var(--fg2);text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;width:100%;}
/* ─── Header logo ────────────────────────────── */
.logo{display:flex;align-items:center;gap:9px}
.logo-icon{width:26px;height:26px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#fff;flex-shrink:0}
.logo-name{font-size:13px;color:var(--text-bright);letter-spacing:.02em}
.logo-sub{font-size:10px;color:var(--text-dim)}
.header-right{display:flex;gap:6px;align-items:center}
#canvas-info{font-size:10px;color:var(--text-dim);margin-right:6px}
/* ─── Responsive ─────────────────────────────── */
@media(max-width:800px){
  #main{flex-direction:column}
  #settings-panel{width:100%;max-height:40vh;border-right:none;border-bottom:1px solid var(--border)}
  #resize-handle{display:none}
  #editor-panel,#preview-panel{flex:1 1 50%}
  html,body{overflow:auto;height:auto}
  #app{height:auto;min-height:100vh}
}