/* Mahana Playground — shared styles */
:root {
  --pg-bg: #FAFAF8;
  --pg-surface: #FFFFFF;
  --pg-surface-raised: #FFFFFF;
  --pg-border: #E7E5E0;
  --pg-border-strong: #D6D3CD;
  --pg-ink: #111111;
  --pg-ink-dim: #6B6964;
  --pg-ink-mute: #9A9893;
  --pg-accent: #111111;
  --pg-radius: 12px;
  --pg-radius-sm: 8px;
  --pg-shadow-card: 0 1px 2px rgba(0,0,0,0.04), 0 1px 0 rgba(0,0,0,0.02);
  --pg-shadow-float: 0 10px 30px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --pg-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --pg-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
[data-pg-theme="dark"] {
  --pg-bg: #0C0C0B;
  --pg-surface: #161615;
  --pg-surface-raised: #1E1E1C;
  --pg-border: #2A2A27;
  --pg-border-strong: #3A3A35;
  --pg-ink: #F5F4F1;
  --pg-ink-dim: #B5B3AD;
  --pg-ink-mute: #7A7872;
  --pg-accent: #F5F4F1;
  --pg-shadow-card: 0 1px 2px rgba(0,0,0,0.3);
  --pg-shadow-float: 0 12px 40px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; overscroll-behavior: none; }
body {
  font-family: var(--pg-font);
  background: var(--pg-bg);
  color: var(--pg-ink);
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Shell grid */
.pg-shell { display: grid; grid-template-columns: 260px 1fr 320px; grid-template-rows: 52px 1fr; height: 100vh; }
.pg-topbar { grid-column: 1 / -1; display: flex; align-items: center; gap: 16px; padding: 0 16px;
             border-bottom: 1px solid var(--pg-border); background: var(--pg-surface); }
.pg-sidebar-left { border-right: 1px solid var(--pg-border); background: var(--pg-surface);
                   overflow-y: auto; padding: 16px; }
.pg-canvas-wrap { overflow: auto; padding: 32px; background: var(--pg-bg); position: relative; }
.pg-sidebar-right { border-left: 1px solid var(--pg-border); background: var(--pg-surface);
                    overflow-y: auto; padding: 16px; }

/* Top bar */
.pg-brand { font-weight: 700; letter-spacing: -0.01em; font-size: 14px; }
.pg-brand .dim { color: var(--pg-ink-mute); font-weight: 500; margin-left: 6px; }
.pg-component-name { font-family: var(--pg-mono); font-size: 12px; color: var(--pg-ink-dim);
                     padding: 4px 10px; border-radius: 999px; background: var(--pg-bg);
                     border: 1px solid var(--pg-border); }
.pg-spacer { flex: 1; }
.pg-btn { border: 1px solid var(--pg-border-strong); background: var(--pg-surface); color: var(--pg-ink);
          padding: 6px 12px; border-radius: 8px; font-size: 12px; font-weight: 500;
          cursor: pointer; font-family: inherit; display: inline-flex; align-items: center; gap: 6px;
          transition: background 120ms, border-color 120ms; }
.pg-btn:hover { background: var(--pg-bg); border-color: var(--pg-ink); }
.pg-btn.primary { background: var(--pg-ink); color: var(--pg-surface); border-color: var(--pg-ink); }
.pg-btn.primary:hover { opacity: 0.9; }
.pg-btn.danger { color: #B42318; }

/* Tweaks */
.pg-tweaks-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
                   color: var(--pg-ink-mute); font-weight: 600; margin: 0 0 10px; }
.pg-tweak { margin-bottom: 20px; }
.pg-tweak-label { font-size: 12px; font-weight: 500; color: var(--pg-ink-dim); margin-bottom: 6px; display: block; }
.pg-segment { display: flex; gap: 2px; background: var(--pg-bg); border: 1px solid var(--pg-border);
              border-radius: 8px; padding: 2px; }
.pg-segment button { flex: 1; border: 0; background: transparent; color: var(--pg-ink-dim);
                     padding: 6px 10px; border-radius: 6px; font-size: 12px; font-weight: 500;
                     cursor: pointer; font-family: inherit; transition: all 120ms; }
.pg-segment button[aria-pressed="true"] { background: var(--pg-surface-raised); color: var(--pg-ink);
                                          box-shadow: var(--pg-shadow-card); }
.pg-check { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 12px; color: var(--pg-ink-dim); }
.pg-check input { margin: 0; accent-color: var(--pg-ink); }

/* Canvas */
.pg-canvas { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(var(--pg-card-min, 240px), 1fr)); }
.pg-group { margin-bottom: 32px; }
.pg-group-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
                  color: var(--pg-ink-mute); font-weight: 600; margin: 0 0 12px; }
.pg-card { background: var(--pg-surface); border: 1px solid var(--pg-border); border-radius: var(--pg-radius);
           overflow: hidden; box-shadow: var(--pg-shadow-card); display: flex; flex-direction: column; }
.pg-card-stage { flex: 1; min-height: 140px; display: flex; align-items: center; justify-content: center;
                 padding: 24px; position: relative; background: var(--pg-surface);
                 background-image: var(--pg-stage-bg, none); background-size: cover; background-position: center; }
.pg-card-stage[data-bg="grid"] {
  background-image:
    linear-gradient(var(--pg-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--pg-border) 1px, transparent 1px);
  background-size: 16px 16px; background-position: -1px -1px;
}
.pg-card-stage[data-bg="neutral"] { background: var(--pg-bg); }
.pg-card-stage[data-bg="painterly"] {
  background: linear-gradient(135deg, #FFB359 0%, #FF7A8A 25%, #E86CC7 50%, #8B7BFF 75%, #6FD8FF 100%);
}
.pg-card-stage[data-bg="dark"] { background: #0C0C0B; }
.pg-card-meta { padding: 10px 14px; border-top: 1px solid var(--pg-border);
                display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.pg-card-label { font-size: 12px; font-weight: 500; color: var(--pg-ink); }
.pg-card-sublabel { font-size: 11px; color: var(--pg-ink-mute); font-family: var(--pg-mono); }

/* Breakpoint frame */
.pg-viewport { width: var(--pg-viewport-w, 100%); max-width: 100%;
               margin: 0 auto; transition: width 180ms ease; }

/* Gallery mode */
.pg-gallery { position: fixed; inset: 0; background: var(--pg-bg); display: flex; flex-direction: column;
              z-index: 1000; animation: pg-fade 180ms ease both; }
.pg-gallery-top { height: 52px; display: flex; align-items: center; gap: 12px; padding: 0 16px;
                  border-bottom: 1px solid var(--pg-border); background: var(--pg-surface); }
.pg-gallery-stage { flex: 1; display: flex; align-items: center; justify-content: center; padding: 48px;
                    position: relative; overflow: hidden;
                    background: var(--pg-stage-bg, var(--pg-surface)); background-size: cover; background-position: center; }
.pg-gallery-stage[data-bg="grid"] {
  background-image:
    linear-gradient(var(--pg-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--pg-border) 1px, transparent 1px);
  background-size: 24px 24px; background-position: -1px -1px;
}
.pg-gallery-stage[data-bg="neutral"] { background: var(--pg-bg); }
.pg-gallery-stage[data-bg="painterly"] {
  background: linear-gradient(135deg, #FFB359 0%, #FF7A8A 25%, #E86CC7 50%, #8B7BFF 75%, #6FD8FF 100%);
}
.pg-gallery-stage[data-bg="dark"] { background: #0C0C0B; }
.pg-gallery-meta { padding: 16px 24px; border-top: 1px solid var(--pg-border); background: var(--pg-surface);
                   display: flex; align-items: center; gap: 16px; }
@keyframes pg-fade { from { opacity: 0; } to { opacity: 1; } }

/* Toast */
.pg-toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
            background: var(--pg-ink); color: var(--pg-surface); padding: 10px 16px;
            border-radius: 8px; font-size: 13px; z-index: 2000; box-shadow: var(--pg-shadow-float);
            animation: pg-toast 2400ms both; }
@keyframes pg-toast {
  0%, 100% { opacity: 0; transform: translate(-50%, 8px); }
  10%, 85% { opacity: 1; transform: translate(-50%, 0); }
}

/* Kbd */
.pg-kbd { display: inline-flex; align-items: center; justify-content: center; min-width: 18px;
          padding: 1px 5px; border: 1px solid var(--pg-border-strong); border-bottom-width: 2px;
          border-radius: 4px; font-family: var(--pg-mono); font-size: 11px; color: var(--pg-ink-dim);
          background: var(--pg-surface); }

/* Spec side-panel */
.pg-spec h3 { margin: 0 0 4px; font-size: 13px; font-weight: 600; }
.pg-spec .desc { color: var(--pg-ink-dim); font-size: 12px; margin: 0 0 16px; }
.pg-spec .section { margin-bottom: 14px; }
.pg-spec .section-title { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em;
                          color: var(--pg-ink-mute); font-weight: 600; margin-bottom: 6px; }
.pg-spec .pill-row { display: flex; flex-wrap: wrap; gap: 4px; }
.pg-spec .pill { font-family: var(--pg-mono); font-size: 11px; padding: 2px 6px;
                 background: var(--pg-bg); border: 1px solid var(--pg-border); border-radius: 4px; color: var(--pg-ink-dim); }
.pg-spec a { color: var(--pg-ink); text-decoration: underline; }

/* Skills pills */
.pg-kit-bar { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--pg-ink-mute);
              padding: 8px 16px; background: var(--pg-bg); border-bottom: 1px solid var(--pg-border); }
.pg-kit-bar .dot { width: 6px; height: 6px; border-radius: 50%; background: #10A37F; display: inline-block; }

/* Hide empty states cleanly */
.pg-empty { text-align: center; color: var(--pg-ink-mute); font-size: 13px; padding: 80px 0; }