/* =============================================
   Dexpix Flexbox Playground v1.1
   ============================================= */

:root {
  --dp: #1b5e8c; --dpd: #134a6e; --dpl: #e8f4fd; --dpt: #1e293b; --dpm: #64748b;
  --dpbg: #f8fafc; --dpw: #ffffff; --dpb: #e2e8f0; --dp-success: #10b981;
  --dp-error: #ef4444; --dp-body: #475569;
  --dp-shadow: 0 1px 3px rgba(0,0,0,0.06); --dp-shadow-hover: 0 8px 25px rgba(27,94,140,0.12);
  --dp-transition: 0.2s ease;
}

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

.fx-app {
  font-family: system-ui, -apple-system, sans-serif; color: var(--dpt);
  background: var(--dpbg); padding: 32px 16px 48px; -webkit-font-smoothing: antialiased;
}

/* Header */
.fx-header { text-align: center; margin-bottom: 32px; max-width: 1100px; margin-left: auto; margin-right: auto; }
.fx-header h2 { font-size: 22px; font-weight: 600; color: var(--dpt); margin-bottom: 8px; }
.fx-header p { color: var(--dp-body); font-size: 16px; line-height: 1.75; }

/* Layout */
.fx-layout { display: grid; grid-template-columns: 1fr 320px; gap: 24px; max-width: 1100px; margin: 0 auto; }
@media (max-width: 900px) { .fx-layout { grid-template-columns: 1fr; } }

/* Card */
.fx-card { background: var(--dpw); border: 1px solid var(--dpb); border-radius: 12px; padding: 24px; box-shadow: var(--dp-shadow); }
.fx-card-title { font-size: 14px; font-weight: 600; color: var(--dpt); margin-bottom: 16px; }

/* Preview Panel */
.fx-preview-panel { background: var(--dpw); border: 1px solid var(--dpb); border-radius: 12px; padding: 24px; box-shadow: var(--dp-shadow); display: flex; flex-direction: column; }

.fx-preview-area {
  border: 2px dashed var(--dpb); border-radius: 8px; min-height: 320px; padding: 16px;
  display: flex; gap: 8px; transition: all 0.3s ease; position: relative;
}

/* Flex Items */
.fx-item {
  display: flex; align-items: center; justify-content: center;
  min-width: 48px; min-height: 48px; padding: 8px 16px;
  background: var(--dpl); border: 1px solid var(--dp); border-radius: 6px;
  font-size: 14px; font-weight: 600; color: var(--dp);
  cursor: pointer; transition: all var(--dp-transition); position: relative;
}

.fx-item:hover { box-shadow: var(--dp-shadow-hover); transform: translateY(-1px); }
.fx-item.active { background: var(--dp); color: var(--dpw); border-color: var(--dpd); }
.fx-item-num { pointer-events: none; }

.fx-item-remove {
  position: absolute; top: -6px; right: -6px; width: 18px; height: 18px;
  border-radius: 50%; background: var(--dp-error); color: #fff; border: none;
  font-size: 14px; line-height: 1; cursor: pointer; display: none;
  align-items: center; justify-content: center;
}

.fx-item:hover .fx-item-remove { display: flex; }

/* Items Bar */
.fx-items-bar {
  display: flex; align-items: center; gap: 8px; margin-top: 16px;
  padding-top: 16px; border-top: 1px solid var(--dpb);
}

.fx-items-bar-label { font-size: 14px; font-weight: 500; color: var(--dpm); }

.fx-add-item-btn {
  padding: 6px 16px; background: var(--dp); border: none; border-radius: 6px;
  color: #fff; font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px; font-weight: 500; cursor: pointer; transition: background var(--dp-transition);
}

.fx-add-item-btn:hover { background: var(--dpd); }

.fx-reset-btn {
  padding: 6px 16px; background: var(--dpw); border: 1px solid var(--dpb);
  border-radius: 6px; color: var(--dpt); font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px; font-weight: 500; cursor: pointer; transition: all var(--dp-transition);
}

.fx-reset-btn:hover { border-color: var(--dp-error); color: var(--dp-error); }

/* Code Output */
.fx-code-output { margin-top: 16px; background: var(--dpt); border-radius: 8px; overflow: hidden; }
.fx-code-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 16px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.fx-code-header span { font-family: 'Courier New', monospace; font-size: 14px; color: rgba(255,255,255,0.5); }

.fx-copy-btn {
  display: inline-flex; align-items: center; gap: 8px; background: var(--dp); border: none; color: #fff;
  font-family: system-ui, -apple-system, sans-serif; font-size: 14px; font-weight: 500;
  padding: 8px 16px; border-radius: 6px; cursor: pointer; transition: background var(--dp-transition);
}

.fx-copy-btn:hover { background: var(--dpd); }
.fx-copy-btn.copied { background: var(--dp-success); }
.fx-copy-btn svg { width: 16px; height: 16px; }

.fx-code-body {
  padding: 16px; font-family: 'Courier New', monospace; font-size: 14px; line-height: 1.75;
  color: #e2e8f0; white-space: pre-wrap; word-break: break-all; max-height: 200px; overflow-y: auto;
}

.fx-code-prop { color: #7dd3fc; }
.fx-code-val { color: #86efac; }
.fx-code-punc { color: rgba(255,255,255,0.4); }
.fx-code-comment { color: rgba(255,255,255,0.3); font-style: italic; }

/* Controls */
.fx-controls { display: flex; flex-direction: column; gap: 16px; }

/* Select Row */
.fx-select-row { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.fx-select-row:last-child { margin-bottom: 0; }
.fx-select-label { font-size: 14px; color: var(--dpm); min-width: 88px; }

.fx-select-row select {
  flex: 1; background: var(--dpw); border: 1px solid var(--dpb); border-radius: 6px;
  padding: 8px 16px; font-family: system-ui, -apple-system, sans-serif; font-size: 14px;
  color: var(--dpt); outline: none; cursor: pointer; transition: border-color var(--dp-transition);
}

.fx-select-row select:focus { border-color: var(--dp); }

/* Slider */
.fx-slider-row { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.fx-slider-row:last-child { margin-bottom: 0; }
.fx-slider-label { font-size: 14px; color: var(--dpm); min-width: 88px; }

.fx-slider-row input[type="range"] {
  flex: 1; -webkit-appearance: none; appearance: none; height: 4px;
  background: var(--dpb); border-radius: 4px; outline: none; cursor: pointer;
}

.fx-slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--dp); border: 2px solid var(--dpw); box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.fx-slider-row input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%; background: var(--dp);
  border: 2px solid var(--dpw); box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.fx-slider-val { font-family: 'Courier New', monospace; font-size: 14px; color: var(--dpt); min-width: 32px; text-align: right; font-weight: 500; }

/* Item Tabs */
.fx-item-tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 16px; }

.fx-item-tab {
  padding: 4px 16px; background: var(--dpbg); border: 1px solid var(--dpb); border-radius: 6px;
  font-family: system-ui, -apple-system, sans-serif; font-size: 14px; font-weight: 500;
  color: var(--dpm); cursor: pointer; transition: all var(--dp-transition);
}

.fx-item-tab:hover { border-color: var(--dp); }
.fx-item-tab.active { background: var(--dp); color: #fff; border-color: var(--dp); }

/* Presets */
.fx-presets-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.fx-preset {
  background: var(--dpbg); border: 1px solid var(--dpb); border-radius: 8px;
  cursor: pointer; transition: all var(--dp-transition); padding: 8px; overflow: hidden;
}

.fx-preset:hover { border-color: var(--dp); box-shadow: var(--dp-shadow-hover); transform: translateY(-2px); }

.fx-preset-visual {
  display: flex; gap: 4px; margin-bottom: 8px; padding: 8px;
  background: var(--dpw); border-radius: 6px; min-height: 40px; overflow: hidden;
}

.fx-preset-block {
  background: var(--dpl); border: 1px solid var(--dp); border-radius: 3px;
  min-height: 16px; flex-shrink: 0;
}

.fx-preset-name {
  font-size: 11px; color: var(--dp); font-weight: 500; text-transform: uppercase;
  letter-spacing: 0.03em; text-align: center; display: block;
}

/* Share */
.fx-share-section { margin-top: 16px; }
.fx-share-url-row { display: flex; gap: 8px; margin-bottom: 16px; }
.fx-share-url-input { flex: 1; background: var(--dpbg); border: 1px solid var(--dpb); border-radius: 6px; padding: 8px 16px; font-family: 'Courier New', monospace; font-size: 14px; color: var(--dpt); outline: none; min-width: 0; }
.fx-share-copy-btn { display: inline-flex; align-items: center; background: var(--dp); border: none; color: #fff; font-family: system-ui, -apple-system, sans-serif; font-size: 14px; font-weight: 500; padding: 8px 16px; border-radius: 6px; cursor: pointer; transition: background var(--dp-transition); white-space: nowrap; }
.fx-share-copy-btn:hover { background: var(--dpd); }
.fx-share-copy-btn.copied { background: var(--dp-success); }

.fx-share-socials { display: flex; gap: 8px; margin-bottom: 16px; }
.fx-share-social-btn { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--dpw); border: 1px solid var(--dpb); border-radius: 6px; padding: 8px 16px; font-family: system-ui, -apple-system, sans-serif; font-size: 14px; font-weight: 500; color: var(--dpt); cursor: pointer; transition: all var(--dp-transition); text-decoration: none; }
.fx-share-social-btn:hover { border-color: var(--dp); color: var(--dp); }
.fx-share-social-btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.fx-share-badge { padding: 16px; background: var(--dpbg); border: 1px solid var(--dpb); border-radius: 6px; }
.fx-share-badge-label { font-size: 14px; font-weight: 500; color: var(--dpm); margin-bottom: 8px; }
.fx-share-badge-code { font-family: 'Courier New', monospace; font-size: 14px; color: var(--dpt); background: var(--dpw); border: 1px solid var(--dpb); border-radius: 6px; padding: 8px 16px; width: 100%; outline: none; cursor: pointer; }

/* Responsive */
@media (max-width: 900px) { .fx-app { padding: 24px 16px 48px; } }
@media (max-width: 480px) { .fx-presets-grid { grid-template-columns: 1fr; } }