/* abcGEO integration — scoped InstaStack tool shell (bright theme) */
#instastack-app {
  position: relative;
  border-radius: 0;
  overflow: hidden;
  margin: 0.5rem 0 0;
  isolation: isolate;
  box-shadow: inset 0 1px 0 rgba(26, 32, 44, 0.06);
}

#instastack-app .container {
  padding-top: 1.75rem;
}

#instastack-app .hero {
  margin-bottom: 2rem;
}

#instastack-app .btn {
  font-family: "Outfit", sans-serif;
}

/* Prism inside tool */
#instastack-app pre[class*="language-"] {
  margin: 0;
  background: transparent;
  border-radius: 0;
  padding: 1.1rem 1.25rem 1.35rem;
  font-size: 0.82rem;
  line-height: 1.55;
  overflow: auto;
  max-height: min(52vh, 560px);
}

#instastack-app code[class*="language-"],
#instastack-app pre[class*="language-"] {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  text-shadow: none;
}

/* Guard: abcGEO and InstaStack share class names (.hero, .brand-mark, .field).
   Neutralise the site-level properties the tool does not itself declare. */
#instastack-app .hero {
  position: static;
  min-height: 0;
  display: block;
  align-items: normal;
  overflow: visible;
  border-bottom: 0;
}

#instastack-app .brand-mark {
  font-size: 0;
  margin: 0;
  line-height: 0;
}

#instastack-app .field label {
  font-family: inherit;
}

#instastack-app {
  /* Surfaces — warm cream page, crisp white cards */
  --bg: #FAF9F6;
  --bg-panel: #FFFFFF;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-solid: #FFFFFF;
  --inset: #F4F7F6;

  /* Text — soft dark slate (AAA on every surface below) */
  --text: #1A202C;
  --text-muted: #455063;
  --text-on-fill: #141A23;

  /* Secondary accent — vibrant cyan / teal */
  --blue: #00B4D8;        /* fill / border / glow only */
  --blue-deep: #0093B0;
  --blue-ink: #0A5A72;    /* TEXT — 7.73:1 on white */
  --cyan-fill: #22C9EC;   /* button fill — 8.85:1 with --text-on-fill */
  --cyan-fill-hi: #3DD0EC;

  /* Primary accent — electric amber / coral */
  --orange: #FF6B4A;      /* fill / glow only */
  --orange-bright: #FF8C00;
  --orange-hi: #FFA033;
  --orange-ink: #8F2F10;  /* TEXT — 8.13:1 on white */

  /* Tertiary — teal */
  --emerald: #00C9A7;     /* fill — 8.25:1 with --text-on-fill */
  --emerald-hi: #2BDCC0;
  --emerald-ink: #00564C; /* TEXT — 8.62:1 on white */

  --border: rgba(26, 32, 44, 0.12);
  --border-strong: rgba(0, 201, 167, 0.55);
  --glow-blue: rgba(0, 180, 216, 0.30);
  --glow-orange: rgba(255, 107, 74, 0.30);
  --glow-emerald: rgba(0, 201, 167, 0.30);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 3px rgba(26, 32, 44, 0.05), 0 14px 32px -14px rgba(255, 107, 74, 0.20),
            0 10px 26px -16px rgba(0, 201, 167, 0.22);
  --ease-energetic: cubic-bezier(0.34, 1.56, 0.64, 1);
}
#instastack-app, #instastack-app * { box-sizing: border-box; }

    #instastack-app {
      font-family: "Outfit", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      margin: 0;
      line-height: 1.5;
      background-image:
        radial-gradient(ellipse 70% 45% at 12% -6%, rgba(255, 107, 74, 0.16), transparent 55%),
        radial-gradient(ellipse 55% 40% at 92% 6%, rgba(0, 201, 167, 0.16), transparent 50%),
        radial-gradient(ellipse 50% 32% at 50% 102%, rgba(255, 176, 32, 0.14), transparent 55%),
        linear-gradient(180deg, #FFFFFF 0%, #FAF9F6 45%, #F4F7F6 100%);
    }

    #instastack-app .container {
      max-width: 1140px;
      margin: 0 auto;
      padding: 2.5rem 1.5rem 4rem;
    }

    #instastack-app .hero {
      text-align: center;
      margin-bottom: 2.5rem;
      animation: fadeUp 0.6s ease both;
    }

    #instastack-app .brand {
      display: inline-flex;
      align-items: center;
      gap: 0.7rem;
      margin-bottom: 0.85rem;
    }

    #instastack-app .brand-mark {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 40%, var(--orange) 100%);
      box-shadow: 0 0 28px var(--glow-blue), 0 0 18px var(--glow-orange);
      position: relative;
      flex-shrink: 0;
      animation: pulseGlow 3.5s ease-in-out infinite;
    }

    #instastack-app .brand-mark::after {
      content: "";
      position: absolute;
      inset: 9px;
      border: 2px solid rgba(255, 255, 255, 0.92);
      border-radius: 4px;
      border-right-color: transparent;
      border-bottom-color: transparent;
      transform: rotate(45deg);
    }

    #instastack-app .brand-name {
      font-size: clamp(2.4rem, 6vw, 3.5rem);
      font-weight: 800;
      letter-spacing: -0.04em;
      line-height: 1;
      background: linear-gradient(105deg, var(--orange-ink) 6%, #C2410C 40%, var(--emerald-ink) 92%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    #instastack-app .hero-sub {
      margin: 0 auto;
      max-width: 34rem;
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    #instastack-app .presets {
      margin: -0.35rem 0 1.75rem;
      animation: fadeUp 0.55s ease 0.05s both;
    }

    #instastack-app .presets-label {
      margin: 0 0 0.75rem;
      text-align: center;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    #instastack-app .preset-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.55rem;
    }

    #instastack-app .preset-btn {
      appearance: none;
      border: 1px solid var(--border);
      background: var(--surface-solid);
      box-shadow: 0 1px 2px rgba(26, 32, 44, 0.05);
      color: var(--text);
      padding: 0.55rem 0.95rem;
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 0.86rem;
      font-weight: 600;
      cursor: pointer;
      transition: border-color 0.18s, background 0.18s, color 0.18s, transform 0.18s, box-shadow 0.18s;
    }

    #instastack-app .preset-btn:hover {
      transform: translateY(-2px) scale(1.02);
      border-color: var(--emerald);
      background: rgba(0, 201, 167, 0.12);
      box-shadow: 0 8px 18px -8px var(--glow-emerald);
    }

    #instastack-app .preset-btn.active {
      border-color: var(--orange);
      background: rgba(255, 107, 74, 0.14);
      color: var(--orange-ink);
      box-shadow: 0 8px 20px -8px var(--glow-orange);
    }

    #instastack-app .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.15rem;
      margin-bottom: 1.15rem;
    }

    #instastack-app .panel, #instastack-app .env-panel, #instastack-app .output-section, #instastack-app .arch-section {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    }

    #instastack-app .panel {
      padding: 1.25rem 1.25rem 1.35rem;
      animation: fadeUp 0.55s ease both;
    }

    #instastack-app .panel:nth-child(1) { animation-delay: 0.05s; }
    #instastack-app .panel:nth-child(2) { animation-delay: 0.1s; }
    #instastack-app .panel:nth-child(3) { animation-delay: 0.15s; }
    #instastack-app .panel:nth-child(4) { animation-delay: 0.2s; }

    #instastack-app .panel:hover {
      border-color: rgba(0, 201, 167, 0.5);
      transform: translateY(-3px);
      box-shadow: 0 2px 6px rgba(26, 32, 44, 0.05), 0 20px 40px -18px rgba(255, 107, 74, 0.26),
                  0 14px 32px -20px rgba(0, 201, 167, 0.28);
    }

    #instastack-app .env-panel {
      padding: 1.25rem 1.35rem 1.4rem;
      margin-bottom: 1.5rem;
      animation: fadeUp 0.55s ease 0.22s both;
    }

    #instastack-app .env-panel:hover {
      border-color: rgba(0, 201, 167, 0.5);
    }

    #instastack-app .panel-label {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin: 0 0 1rem;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--blue-ink);
    }

    #instastack-app .panel-label .step {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.4rem;
      height: 1.4rem;
      border-radius: 6px;
      background: rgba(0, 201, 167, 0.20);
      color: var(--blue-ink);
      font-size: 0.72rem;
      font-weight: 700;
    }

    #instastack-app .panel-label.orange { color: var(--orange-ink); }
    #instastack-app .panel-label.orange .step {
      background: rgba(255, 140, 0, 0.22);
      color: var(--orange-ink);
    }

    #instastack-app .tool-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
      gap: 0.55rem;
    }

    #instastack-app .tool-card {
      position: relative;
      display: block;
      cursor: pointer;
      margin: 0;
    }

    #instastack-app .tool-card input {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }

    #instastack-app .tool-card-face {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      min-height: 92px;
      padding: 0.7rem 0.45rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--surface-solid);
      color: var(--text-muted);
      text-align: center;
      transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
    }

    #instastack-app .tool-card:hover .tool-card-face {
      transform: translateY(-3px) scale(1.02);
      border-color: rgba(0, 201, 167, 0.55);
      color: var(--text);
      box-shadow: 0 10px 20px -10px var(--glow-emerald);
    }

    #instastack-app .tool-card:has(input:checked) .tool-card-face, #instastack-app .tool-card input:checked + .tool-card-face {
      border-color: var(--emerald);
      background: rgba(0, 201, 167, 0.16);
      color: var(--text);
      box-shadow: 0 0 0 2px rgba(0, 201, 167, 0.35), 0 10px 22px -10px var(--glow-emerald);
    }

    #instastack-app .tool-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.85rem;
      height: 1.85rem;
      font-size: 1.7rem;
      line-height: 1;
    }

    #instastack-app .tool-icon i { font-size: 1.7rem; }
    #instastack-app .tool-svg { width: 1.55rem; height: 1.55rem; color: var(--blue-ink); }
    #instastack-app .tool-card:has(input:checked) .tool-svg { color: var(--emerald-ink); }

    #instastack-app .tool-card-name {
      font-size: 0.74rem;
      font-weight: 600;
      line-height: 1.25;
      letter-spacing: 0.01em;
    }

    #instastack-app .env-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 0.9rem;
    }

    #instastack-app .env-intro {
      margin: -0.15rem 0 0.95rem;
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    #instastack-app .field label {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 0.5rem;
      margin-bottom: 0.35rem;
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    #instastack-app .field-flag {
      font-family: "JetBrains Mono", monospace;
      font-size: 0.68rem;
      font-weight: 500;
      letter-spacing: 0;
      text-transform: none;
      color: var(--blue-ink);
    }

    #instastack-app .field input {
      width: 100%;
      padding: 0.65rem 0.75rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--surface-solid);
      color: var(--text);
      font-family: inherit;
      font-size: 0.92rem;
      outline: none;
      transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
    }

    #instastack-app .field input::placeholder { color: #5B6472; }

    #instastack-app .field input:focus {
      border-color: var(--emerald);
      box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.3);
      transform: scale(1.01);
    }

    #instastack-app .field-hint {
      margin: 0.35rem 0 0;
      font-size: 0.72rem;
      color: var(--text-muted);
    }

    #instastack-app .field-hint code {
      font-family: "JetBrains Mono", monospace;
      font-size: 0.68rem;
      color: var(--text-muted);
    }

    #instastack-app .env-flags-preview {
      margin-top: 0.95rem;
      padding: 0.7rem 0.85rem;
      border-radius: var(--radius-sm);
      border: 1px dashed rgba(0, 201, 167, 0.45);
      background: rgba(0, 201, 167, 0.09);
      font-family: "JetBrains Mono", monospace;
      font-size: 0.74rem;
      color: var(--emerald-ink);
      overflow-x: auto;
      white-space: nowrap;
    }

    #instastack-app .env-flags-preview:empty, #instastack-app .env-flags-preview.is-empty {
      color: var(--text-muted);
      border-style: solid;
      border-color: var(--border);
      background: var(--inset);
    }

    #instastack-app .output-section {
      padding: 1.4rem;
      animation: fadeUp 0.6s ease 0.25s both;
    }

    #instastack-app .output-header {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      margin-bottom: 1rem;
    }

    #instastack-app .tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
    }

    #instastack-app .tab-btn {
      background: transparent;
      color: var(--text-muted);
      border: 1px solid transparent;
      padding: 0.5rem 0.9rem;
      border-radius: 999px;
      cursor: pointer;
      font-family: inherit;
      font-size: 0.88rem;
      font-weight: 500;
      transition: color 0.15s, background 0.15s, border-color 0.15s, transform 0.15s;
    }

    #instastack-app .tab-btn:hover {
      color: var(--text);
      background: rgba(26, 32, 44, 0.06);
      transform: translateY(-1px) scale(1.02);
    }

    #instastack-app .tab-btn.active {
      background: rgba(0, 201, 167, 0.16);
      border-color: var(--emerald);
      color: #00463E;
    }

    #instastack-app .btn {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      border: none;
      padding: 0.55rem 1rem;
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 0.88rem;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
    }

    #instastack-app .btn:hover { transform: scale(1.02); }
    #instastack-app .btn:active { transform: translateY(1px); }

    #instastack-app .btn-primary {
      background: linear-gradient(135deg, var(--emerald) 0%, var(--emerald-hi) 100%);
      color: var(--text-on-fill);
      box-shadow: 0 6px 18px -6px var(--glow-emerald);
    }

    #instastack-app .btn-accent {
      background: linear-gradient(135deg, var(--orange-bright) 0%, var(--orange-hi) 100%);
      color: var(--text-on-fill);
      box-shadow: 0 6px 18px -6px var(--glow-orange);
    }

    #instastack-app .btn-ghost {
      background: var(--surface-solid);
      color: var(--text);
      border: 1px solid var(--border);
    }

    #instastack-app .btn-ghost:hover {
      background: var(--inset);
      border-color: rgba(0, 201, 167, 0.5);
    }

    #instastack-app .export-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 0.85rem;
    }

    #instastack-app .export-actions .btn {
      flex: 1 1 160px;
      justify-content: center;
    }

    #instastack-app .btn-curl {
      background: linear-gradient(135deg, var(--cyan-fill) 0%, var(--cyan-fill-hi) 100%);
      color: var(--text-on-fill);
      box-shadow: 0 6px 18px -6px var(--glow-blue);
    }

    #instastack-app .btn-curl:hover {
      filter: brightness(1.05);
    }

    #instastack-app .quick-run {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.65rem;
      margin-bottom: 1rem;
      padding: 0.75rem 0.9rem;
      border: 1px solid rgba(0, 180, 216, 0.35);
      border-radius: var(--radius-sm);
      background: linear-gradient(120deg, rgba(0, 201, 167, 0.10), rgba(255, 140, 0, 0.08));
    }

    #instastack-app .quick-run-meta {
      flex: 0 0 auto;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--blue-ink);
    }

    #instastack-app .quick-run-cmd {
      flex: 1 1 220px;
      margin: 0;
      padding: 0.45rem 0.65rem;
      overflow-x: auto;
      border-radius: 6px;
      background: var(--surface-solid);
      border: 1px solid var(--border);
      color: var(--emerald-ink);
      font-family: "JetBrains Mono", monospace;
      font-size: 0.75rem;
      line-height: 1.5;
      white-space: nowrap;
      cursor: pointer;
    }

    #instastack-app .quick-run-cmd:hover {
      border-color: var(--emerald);
    }

    #instastack-app .quick-run-hint {
      flex: 1 0 100%;
      margin: 0;
      font-size: 0.72rem;
      color: var(--text-muted);
    }

    #instastack-app .code-frame {
      position: relative;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      overflow: hidden;
      background: var(--surface-solid);
      box-shadow: inset 0 0 0 1px rgba(0, 201, 167, 0.06);
    }

    #instastack-app .code-chrome {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.65rem 0.9rem;
      background: var(--inset);
      border-bottom: 1px solid var(--border);
    }

    #instastack-app .code-chrome > span {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: rgba(26, 32, 44, 0.2);
    }

    #instastack-app .code-chrome > span:nth-child(1) { background: #FF6B4A; }
    #instastack-app .code-chrome > span:nth-child(2) { background: #FF8C00; }
    #instastack-app .code-chrome > span:nth-child(3) { background: #00C9A7; }

    #instastack-app .code-chrome .filename {
      margin-left: 0.5rem;
      color: var(--text-muted);
      font-family: "JetBrains Mono", monospace;
      font-size: 0.72rem;
    }

    #instastack-app pre[class*="language-"], #instastack-app pre {
      margin: 0 !important;
      padding: 1.1rem 1.15rem !important;
      overflow: auto;
      font-family: "JetBrains Mono", monospace !important;
      font-size: 0.82rem !important;
      line-height: 1.65 !important;
      min-height: 220px;
      max-height: 420px;
      background: var(--surface-solid) !important;
      color: var(--text) !important;
      text-shadow: none !important;
    }

    #instastack-app code[class*="language-"], #instastack-app code {
      font-family: "JetBrains Mono", monospace !important;
      text-shadow: none !important;
    }

    #instastack-app .token.comment,
    #instastack-app .token.prolog,
    #instastack-app .token.doctype,
    #instastack-app .token.cdata { color: #4A5568 !important; }
    #instastack-app .token.string,
    #instastack-app .token.attr-value,
    #instastack-app .token.char,
    #instastack-app .token.inserted { color: #0A5C34 !important; }
    #instastack-app .token.function,
    #instastack-app .token.class-name,
    #instastack-app .token.selector { color: #0A5A72 !important; }
    #instastack-app .token.keyword,
    #instastack-app .token.tag,
    #instastack-app .token.important,
    #instastack-app .token.atrule { color: #8F2F10 !important; }
    #instastack-app .token.operator,
    #instastack-app .token.entity,
    #instastack-app .token.url { color: #9A3412 !important; }
    #instastack-app .token.punctuation { color: #455063 !important; }
    #instastack-app .token.number,
    #instastack-app .token.boolean,
    #instastack-app .token.constant,
    #instastack-app .token.symbol { color: #5B21B6 !important; }
    #instastack-app .token.variable,
    #instastack-app .token.property,
    #instastack-app .token.attr-name { color: #6B4200 !important; }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(12px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 0 22px var(--glow-blue), 0 0 12px var(--glow-orange); }
      50% { box-shadow: 0 0 34px var(--glow-blue), 0 0 22px var(--glow-orange); }
    }

    /* Stack Architecture Visualizer */
    #instastack-app .arch-section {
      margin-top: 1.5rem;
      padding: 1.35rem 1.4rem 1.5rem;
      animation: fadeUp 0.6s ease 0.3s both;
    }

    #instastack-app .arch-section:hover {
      border-color: rgba(0, 201, 167, 0.5);
    }

    #instastack-app .arch-header {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-start;
      justify-content: space-between;
      gap: 0.75rem;
      margin-bottom: 1.15rem;
    }

    #instastack-app .arch-header-copy h2 {
      margin: 0 0 0.25rem;
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    #instastack-app .arch-header-copy p {
      margin: 0;
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    #instastack-app .arch-legend {
      display: flex;
      flex-wrap: wrap;
      gap: 0.55rem;
    }

    #instastack-app .arch-legend span {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.28rem 0.55rem;
      border-radius: 999px;
      border: 1px solid var(--border);
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    #instastack-app .arch-legend span::before {
      content: "";
      width: 0.45rem;
      height: 0.45rem;
      border-radius: 50%;
      background: currentColor;
    }

    #instastack-app .arch-legend .lg-frontend { color: var(--blue-ink); }
    #instastack-app .arch-legend .lg-backend { color: var(--orange-ink); }
    #instastack-app .arch-legend .lg-data { color: var(--emerald-ink); }

    #instastack-app .arch-canvas {
      position: relative;
      min-height: 220px;
      padding: 1rem 0.5rem 0.5rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background:
        radial-gradient(circle at 20% 30%, rgba(0, 201, 167, 0.12), transparent 42%),
        radial-gradient(circle at 80% 70%, rgba(255, 107, 74, 0.12), transparent 42%),
        var(--inset);
      overflow: hidden;
    }

    #instastack-app .arch-canvas.docker-active {
      box-shadow: inset 0 0 0 2px rgba(0, 180, 216, 0.28);
    }

    #instastack-app .arch-docker-badge {
      position: absolute;
      top: 0.65rem;
      right: 0.75rem;
      z-index: 2;
      display: none;
      align-items: center;
      gap: 0.35rem;
      padding: 0.28rem 0.6rem;
      border-radius: 999px;
      border: 1px solid rgba(0, 180, 216, 0.45);
      background: rgba(0, 180, 216, 0.14);
      color: var(--blue-ink);
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    #instastack-app .arch-canvas.docker-active .arch-docker-badge { display: inline-flex; }

    #instastack-app .arch-flow {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr auto 1fr auto 1fr;
      gap: 0.35rem;
      align-items: stretch;
      min-height: 180px;
    }

    #instastack-app .arch-layer {
      display: flex;
      flex-direction: column;
      gap: 0.55rem;
      min-width: 0;
    }

    #instastack-app .arch-layer-title {
      margin: 0;
      text-align: center;
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    #instastack-app .arch-layer[data-layer="frontend"] .arch-layer-title { color: var(--blue-ink); }
    #instastack-app .arch-layer[data-layer="backend"] .arch-layer-title { color: var(--orange-ink); }
    #instastack-app .arch-layer[data-layer="data"] .arch-layer-title { color: var(--emerald-ink); }

    #instastack-app .arch-nodes {
      display: flex;
      flex-direction: column;
      gap: 0.45rem;
      flex: 1;
      justify-content: center;
    }

    #instastack-app .arch-node {
      appearance: none;
      width: 100%;
      display: flex;
      align-items: center;
      gap: 0.55rem;
      padding: 0.65rem 0.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--surface-solid);
      color: var(--text);
      font-family: inherit;
      text-align: left;
      cursor: pointer;
      opacity: 0.45;
      filter: grayscale(0.75);
      transform: scale(0.98);
      transition: opacity 0.2s ease, filter 0.2s ease, transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    #instastack-app .arch-node.active {
      opacity: 1;
      filter: none;
      transform: scale(1);
      cursor: pointer;
    }

    #instastack-app .arch-node:not(.active) {
      cursor: default;
    }

    #instastack-app .arch-node.active:hover, #instastack-app .arch-node.active:focus-visible, #instastack-app .arch-node.focused {
      outline: none;
      transform: scale(1.02);
    }

    #instastack-app .arch-node[data-layer="frontend"].active {
      border-color: rgba(0, 180, 216, 0.65);
      box-shadow: 0 8px 18px -10px var(--glow-blue);
    }

    #instastack-app .arch-node[data-layer="backend"].active {
      border-color: rgba(255, 107, 74, 0.65);
      box-shadow: 0 8px 18px -10px var(--glow-orange);
    }

    #instastack-app .arch-node[data-layer="data"].active {
      border-color: rgba(0, 201, 167, 0.65);
      box-shadow: 0 8px 18px -10px var(--glow-emerald);
    }

    #instastack-app .arch-node.focused, #instastack-app .arch-node.linked {
      opacity: 1;
      filter: none;
    }

    #instastack-app .arch-node.focused[data-layer="frontend"], #instastack-app .arch-node.linked[data-layer="frontend"] {
      border-color: var(--blue);
      background: rgba(0, 180, 216, 0.14);
      box-shadow: 0 10px 26px -10px var(--glow-blue);
    }

    #instastack-app .arch-node.focused[data-layer="backend"], #instastack-app .arch-node.linked[data-layer="backend"] {
      border-color: var(--orange);
      background: rgba(255, 107, 74, 0.14);
      box-shadow: 0 10px 26px -10px var(--glow-orange);
    }

    #instastack-app .arch-node.focused[data-layer="data"], #instastack-app .arch-node.linked[data-layer="data"] {
      border-color: var(--emerald);
      background: rgba(0, 201, 167, 0.16);
      box-shadow: 0 10px 26px -10px var(--glow-emerald);
    }

    #instastack-app .arch-node-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.6rem;
      height: 1.6rem;
      font-size: 1.45rem;
      flex-shrink: 0;
    }

    #instastack-app .arch-node-icon i { font-size: 1.45rem; }

    #instastack-app .arch-node-meta {
      display: flex;
      flex-direction: column;
      gap: 0.05rem;
      min-width: 0;
    }

    #instastack-app .arch-node-name {
      font-size: 0.86rem;
      font-weight: 700;
      line-height: 1.2;
    }

    #instastack-app .arch-node-role {
      font-size: 0.68rem;
      color: var(--text-muted);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    #instastack-app .arch-connector {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 72px;
      align-self: center;
    }

    #instastack-app .arch-connector svg {
      width: 72px;
      height: 28px;
      overflow: visible;
    }

    #instastack-app .arch-connector .arch-line, #instastack-app .arch-connector .arch-arrow {
      fill: none;
      stroke: rgba(26, 32, 44, 0.28);
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    #instastack-app .arch-connector .arch-line {
      stroke-dasharray: 5 6;
    }

    #instastack-app .arch-connector.active .arch-line {
      animation: dashFlow 1.1s linear infinite;
    }

    #instastack-app .arch-connector[data-edge="api"].active .arch-line, #instastack-app .arch-connector[data-edge="api"].active .arch-arrow { stroke: url(#arch-grad-a); }

    #instastack-app .arch-connector[data-edge="data"].active .arch-line, #instastack-app .arch-connector[data-edge="data"].active .arch-arrow { stroke: url(#arch-grad-b); }

    #instastack-app .arch-connector-label {
      position: absolute;
      top: calc(50% + 14px);
      left: 50%;
      transform: translateX(-50%);
      padding: 0.12rem 0.35rem;
      border-radius: 999px;
      background: var(--surface-solid);
      border: 1px solid var(--border);
      color: var(--text-muted);
      font-family: "JetBrains Mono", monospace;
      font-size: 0.62rem;
      letter-spacing: 0.02em;
      white-space: nowrap;
      opacity: 0.45;
      transition: opacity 0.2s, color 0.2s, border-color 0.2s;
    }

    #instastack-app .arch-connector.active .arch-connector-label {
      opacity: 1;
      color: var(--text);
      border-color: rgba(0, 201, 167, 0.5);
    }

    #instastack-app .arch-empty {
      display: none;
      position: absolute;
      inset: 0;
      z-index: 3;
      align-items: center;
      justify-content: center;
      padding: 1.5rem;
      text-align: center;
      color: var(--text-muted);
      font-size: 0.9rem;
      background: rgba(250, 249, 246, 0.82);
      backdrop-filter: blur(2px);
    }

    #instastack-app .arch-canvas.is-empty .arch-empty { display: flex; }

    #instastack-app .arch-detail {
      margin-top: 0.9rem;
      min-height: 2.6rem;
      padding: 0.75rem 0.9rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--inset);
      color: var(--text-muted);
      font-size: 0.86rem;
      transition: border-color 0.2s, color 0.2s, background 0.2s;
    }

    #instastack-app .arch-detail strong { color: var(--text); font-weight: 650; }

    #instastack-app .arch-detail.has-focus {
      border-color: rgba(0, 201, 167, 0.45);
      color: var(--text);
      background: rgba(0, 201, 167, 0.09);
    }

    @keyframes dashFlow {
      to { stroke-dashoffset: -22; }
    }

    @media (max-width: 640px) {
      #instastack-app .container { padding: 1.5rem 1rem 3rem; }
      #instastack-app .output-header { flex-direction: column; align-items: stretch; }
      #instastack-app .export-actions { width: 100%; }
      #instastack-app .export-actions .btn { flex: 1 1 100%; }
      #instastack-app .quick-run { flex-direction: column; align-items: stretch; }
      #instastack-app .quick-run .btn { width: 100%; justify-content: center; }
      #instastack-app .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      #instastack-app .arch-flow {
        grid-template-columns: 1fr;
        gap: 0.35rem;
      }
      #instastack-app .arch-connector {
        width: 100%;
        height: 48px;
        transform: rotate(90deg);
        margin: 0.15rem 0;
      }
      #instastack-app .arch-connector-label {
        transform: translateX(-50%) rotate(-90deg);
        top: 50%;
      }
    }