/* ── Flexbox Playground ── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[x-cloak] { display: none !important; }

:root {
  --accent:  #6366f1;
  --agrad:   linear-gradient(135deg,#6366f1,#4f46e5);
  --bg:      #09090f;
  --card:    #111119;
  --card2:   #16161f;
  --text:    #f1f5f9;
  --text2:   #94a3b8;
  --faint:   #64748b;
  --border:  #1c1c2a;
  --border2: #252535;
  --input:   #0d0d17;
}

body { background:var(--bg); color:var(--text); font-family:system-ui,-apple-system,sans-serif; line-height:1.6; min-height:100vh; }

/* ── HEADER ──────────────────────────────────── */
.site-header { position:sticky; top:0; z-index:100; background:rgba(9,9,15,.88); backdrop-filter:blur(12px); border-bottom:1px solid var(--border); }
.header-inner { max-width:1240px; margin:0 auto; padding:0 20px; display:flex; align-items:center; justify-content:space-between; height:56px; }
.logo { display:flex; align-items:center; gap:10px; text-decoration:none; }
.logo-icon { width:32px; height:32px; flex-shrink:0; }
.logo-text { font-size:.95rem; font-weight:800; background:var(--agrad); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.nav-links { display:flex; gap:24px; }
.nav-links a { color:var(--text2); text-decoration:none; font-size:.87rem; font-weight:500; transition:color .15s; }
.nav-links a:hover { color:var(--text); }

/* ── HERO ────────────────────────────────────── */
.hero { text-align:center; padding:52px 20px 36px; }
.hero-badge { display:inline-flex; align-items:center; gap:6px; background:rgba(99,102,241,.1); border:1px solid rgba(99,102,241,.25); color:#a5b4fc; border-radius:999px; padding:4px 14px; font-size:.78rem; font-weight:600; margin-bottom:18px; }
.hero h1 { font-size:clamp(2rem,5vw,2.8rem); font-weight:900; letter-spacing:-.03em; margin-bottom:12px; }
.g { background:var(--agrad); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero p { color:var(--text2); font-size:1rem; max-width:540px; margin:0 auto; }

/* ── PAGE WRAP ───────────────────────────────── */
.page-wrap { max-width:1240px; margin:0 auto; padding:0 20px 80px; }

/* ── MAIN LAYOUT ─────────────────────────────── */
.fp-layout {
  display:grid;
  grid-template-columns:300px 1fr;
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  background:var(--border);
  gap:1px;
  margin-bottom:16px;
}

/* ── CONTROLS ────────────────────────────────── */
.fp-controls {
  background:var(--card);
  padding:20px 16px;
  display:flex;
  flex-direction:column;
  gap:16px;
  overflow-y:auto;
  max-height:calc(100vh - 200px);
  min-height:520px;
}

.ctrl-sep   { height:1px; background:var(--border); flex-shrink:0; }
.ctrl-head  { font-size:.68rem; font-weight:800; color:var(--faint); text-transform:uppercase; letter-spacing:.08em; margin-bottom:8px; }
.ctrl-subhead { font-size:.68rem; font-weight:700; color:var(--faint); text-transform:uppercase; letter-spacing:.07em; margin-bottom:6px; }
.ctrl-row   { display:flex; justify-content:space-between; align-items:center; font-size:.72rem; font-weight:700; color:var(--text2); text-transform:uppercase; letter-spacing:.07em; margin-bottom:6px; }
.ctrl-val   { color:var(--accent); font-weight:800; font-variant-numeric:tabular-nums; }

/* Property button groups */
.prop-btns { display:flex; flex-wrap:wrap; gap:4px; }
.prop-btn {
  padding:4px 9px; border-radius:6px;
  font-size:.71rem; font-weight:700;
  border:1px solid var(--border2); background:var(--input);
  color:var(--faint); cursor:pointer; transition:all .12s;
  white-space:nowrap;
}
.prop-btn:hover  { border-color:var(--accent); color:var(--text); }
.prop-btn.active { border-color:var(--accent); background:rgba(99,102,241,.12); color:var(--accent); }

/* Range sliders */
input[type=range] { -webkit-appearance:none; appearance:none; width:100%; height:5px; background:var(--border2); border-radius:99px; outline:none; cursor:pointer; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:16px; height:16px; border-radius:50%; background:var(--accent); border:2px solid var(--card); box-shadow:0 0 0 2px rgba(99,102,241,.25); }
input[type=range]::-moz-range-thumb { width:16px; height:16px; border-radius:50%; background:var(--accent); border:2px solid var(--card); }
input[type=range]:disabled { opacity:.3; cursor:not-allowed; }

/* Text input */
.prop-input { width:100%; padding:6px 10px; background:var(--input); border:1px solid var(--border2); border-radius:8px; color:var(--text); font-size:.82rem; font-family:monospace; outline:none; transition:border-color .15s; }
.prop-input:focus { border-color:var(--accent); }

/* Basis presets */
.basis-presets { display:flex; flex-wrap:wrap; gap:4px; margin-top:6px; }
.basis-preset { padding:3px 8px; border-radius:5px; font-size:.68rem; font-weight:700; border:1px solid var(--border2); background:transparent; color:var(--faint); cursor:pointer; transition:all .12s; font-family:monospace; }
.basis-preset:hover { border-color:var(--accent); color:var(--accent); }

/* Custom size toggle */
.size-toggle-row { display:flex; align-items:center; justify-content:space-between; gap:8px; margin-bottom:6px; }
.size-toggle-label { font-size:.72rem; font-weight:600; color:var(--text2); }
.mini-toggle { padding:3px 10px; border-radius:999px; font-size:.68rem; font-weight:700; border:1px solid var(--border2); background:transparent; color:var(--faint); cursor:pointer; transition:all .12s; }
.mini-toggle.on { border-color:var(--accent); background:rgba(99,102,241,.1); color:var(--accent); }

/* Item panel */
.item-panel-header { display:flex; align-items:center; gap:8px; }
.item-color-dot { width:12px; height:12px; border-radius:50%; flex-shrink:0; }
.item-panel-name { font-size:.84rem; font-weight:800; color:var(--text); flex:1; }
.deselect-btn { padding:3px 10px; border-radius:999px; font-size:.68rem; font-weight:700; border:1px solid var(--border2); background:transparent; color:var(--faint); cursor:pointer; transition:all .12s; }
.deselect-btn:hover { border-color:#f43f5e; color:#f43f5e; }

.no-item-hint { font-size:.78rem; color:var(--faint); font-style:italic; text-align:center; padding:12px 0; }

/* ── PREVIEW PANEL ───────────────────────────── */
.fp-preview { background:var(--card2); padding:20px; display:flex; flex-direction:column; gap:12px; }

.preview-toolbar {
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
}
.preview-toolbar-label { font-size:.72rem; font-weight:700; color:var(--faint); text-transform:uppercase; letter-spacing:.07em; }
.tb-btn {
  display:inline-flex; align-items:center; gap:5px;
  padding:5px 12px; border-radius:8px; font-size:.76rem; font-weight:700;
  border:1px solid var(--border2); background:var(--input); color:var(--text2);
  cursor:pointer; transition:all .12s;
}
.tb-btn:hover:not(:disabled) { border-color:var(--accent); color:var(--text); }
.tb-btn:disabled { opacity:.35; cursor:not-allowed; }
.tb-btn.danger:hover:not(:disabled) { border-color:#f43f5e; color:#f43f5e; }
.tb-sep { width:1px; height:22px; background:var(--border2); margin:0 2px; }
.tb-h-wrap { display:flex; align-items:center; gap:8px; margin-left:auto; font-size:.72rem; color:var(--faint); }
.tb-h-wrap input[type=range] { width:90px; }
.tb-h-val { font-weight:700; color:var(--accent); font-variant-numeric:tabular-nums; min-width:40px; }

/* The flex container scene */
.preview-scene {
  flex:1;
  border-radius:12px;
  border:2px dashed var(--border2);
  overflow:auto;
  background:
    radial-gradient(circle at 15% 20%, rgba(99,102,241,.04) 0%, transparent 50%),
    var(--bg);
  position:relative;
}

/* Axis labels */
.axis-label {
  position:absolute; font-size:.6rem; font-weight:700;
  color:var(--border2); text-transform:uppercase; letter-spacing:.1em;
  pointer-events:none; user-select:none;
}
.axis-main-x { top:4px; left:50%; transform:translateX(-50%); }
.axis-cross-y { top:50%; left:4px; transform:translateY(-50%) rotate(-90deg); transform-origin:center; }

/* Flex items inside preview */
.fp-item {
  min-width:  52px;
  min-height: 52px;
  border-radius: 10px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.82rem;
  font-weight:800;
  color:#fff;
  cursor:pointer;
  user-select:none;
  transition:outline .1s, box-shadow .1s, transform .12s;
  text-shadow:0 1px 3px rgba(0,0,0,.3);
  position:relative;
}
.fp-item:hover { transform:scale(1.04); }
.fp-item.selected { z-index:2; }

/* Item label badge */
.fp-item-label {
  position:absolute; top:4px; left:6px;
  font-size:.6rem; font-weight:700; opacity:.7;
  line-height:1;
}

/* ── CODE OUTPUT ─────────────────────────────── */
.fp-code-wrap { background:var(--card); border:1px solid var(--border); border-radius:14px; overflow:hidden; margin-bottom:40px; }
.fp-code-head { display:flex; align-items:center; justify-content:space-between; padding:12px 18px; border-bottom:1px solid var(--border); }
.fp-code-title { font-size:.8rem; font-weight:700; color:var(--text2); display:flex; align-items:center; gap:6px; }
.fp-code-title svg { width:14px; height:14px; }
.copy-btn { display:inline-flex; align-items:center; gap:6px; padding:7px 14px; border-radius:8px; font-size:.8rem; font-weight:700; border:1px solid var(--border2); background:var(--input); color:var(--text2); cursor:pointer; transition:all .15s; }
.copy-btn:hover { border-color:var(--accent); color:var(--text); }
.copy-btn.done { border-color:#4ade80; color:#4ade80; background:rgba(74,222,128,.08); }
.copy-btn svg { width:13px; height:13px; }
.fp-code-body { padding:20px 22px; }
.fp-code-body pre { font-family:'Fira Code','Cascadia Code',Consolas,monospace; font-size:.84rem; line-height:1.8; color:var(--text2); white-space:pre; overflow-x:auto; }

/* ── INFO SECTIONS ───────────────────────────── */
.info-sections { display:flex; flex-direction:column; gap:20px; margin-bottom:48px; }
.info-section { background:var(--card); border:1px solid var(--border); border-radius:16px; padding:32px 36px; }
.info-icon-row { display:flex; align-items:center; gap:14px; margin-bottom:14px; }
.info-icon { width:40px; height:40px; border-radius:10px; background:rgba(99,102,241,.1); border:1px solid rgba(99,102,241,.2); display:flex; align-items:center; justify-content:center; flex-shrink:0; color:var(--accent); }
.info-icon svg { width:18px; height:18px; }
.info-section h2 { font-size:1.1rem; font-weight:800; }
.info-body { color:var(--text2); font-size:.9rem; line-height:1.8; }
.info-body p + p { margin-top:10px; }
.info-body ul { padding-left:20px; display:flex; flex-direction:column; gap:6px; }
.info-body strong { color:var(--text); font-weight:700; }
.info-body code { font-family:monospace; font-size:.83em; background:var(--border); padding:1px 5px; border-radius:4px; color:var(--accent); }

/* ── RELATED / BLOG ──────────────────────────── */
.related-section { margin-bottom:48px; }
.related-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.related-header h2 { font-size:1.15rem; font-weight:800; }
.view-all-link { display:inline-flex; align-items:center; gap:4px; font-size:.82rem; font-weight:600; color:var(--accent); text-decoration:none; }
.view-all-link svg { width:14px; height:14px; }
.related-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:14px; }
.related-tool-card { display:flex; flex-direction:column; gap:10px; background:var(--card); border:1px solid var(--border); border-radius:14px; padding:18px; text-decoration:none; color:inherit; transition:border-color .15s,transform .15s; }
.related-tool-card:hover { border-color:var(--accent); transform:translateY(-2px); }
.rt-icon { width:40px; height:40px; border-radius:10px; display:flex; align-items:center; justify-content:center; }
.rt-icon svg { width:20px; height:20px; color:#fff; }
.rt-name { font-size:.9rem; font-weight:700; }
.rt-desc { font-size:.78rem; color:var(--text2); line-height:1.5; flex:1; }
.rt-link { display:inline-flex; align-items:center; gap:3px; font-size:.76rem; font-weight:700; color:var(--accent); }
.rt-link svg { width:12px; height:12px; }
.blog-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.blog-card { display:flex; flex-direction:column; gap:8px; background:var(--card); border:1px solid var(--border); border-radius:14px; padding:20px; text-decoration:none; color:inherit; transition:border-color .15s; }
.blog-card:hover { border-color:var(--accent); }
.blog-cat { display:inline-block; padding:2px 10px; border-radius:999px; font-size:.71rem; font-weight:700; }
.blog-title { font-size:.92rem; font-weight:700; line-height:1.35; }
.blog-excerpt { font-size:.8rem; color:var(--text2); line-height:1.55; flex:1; }
.blog-meta { font-size:.72rem; color:var(--faint); }
.blog-read { display:inline-flex; align-items:center; gap:3px; font-size:.76rem; font-weight:700; color:var(--accent); margin-top:auto; }
.blog-read svg { width:12px; height:12px; }

/* ── FOOTER ──────────────────────────────────── */
.site-footer { background:var(--card); border-top:1px solid var(--border); padding:48px 20px 0; }
.footer-inner { max-width:1240px; margin:0 auto; display:grid; grid-template-columns:1fr auto; gap:40px; padding-bottom:40px; }
.footer-brand { max-width:280px; }
.footer-tagline { font-size:.82rem; color:var(--text2); margin-top:10px; line-height:1.55; }
.footer-nav-wrap { display:flex; gap:48px; }
.footer-col { display:flex; flex-direction:column; gap:8px; }
.footer-col h4 { font-size:.78rem; font-weight:700; color:var(--text2); text-transform:uppercase; letter-spacing:.07em; margin-bottom:12px; }
.footer-col a { font-size:.84rem; color:var(--faint); text-decoration:none; transition:color .15s; }
.footer-col a:hover { color:var(--text); }
.footer-bottom { border-top:1px solid var(--border); padding:16px 0; }
.footer-bottom .inner { max-width:1240px; margin:0 auto; padding:0 20px; display:flex; justify-content:space-between; align-items:center; }
.footer-bottom p { font-size:.78rem; color:var(--faint); }