:root {
      --bg: #eef3f7;
      --sky: #dce8f3;
      --paper: #ffffff;
      --panel: rgba(255, 255, 255, 0.96);
      --line: #d6e0e8;
      --ink: #1f2730;
      --muted: #667687;
      --orange: #f39a63;
      --orange-deep: #d9762f;
      --pink: #ec6f91;
      --berry: #a63f67;
      --blue: #5b8def;
      --mint: #6fcf97;
      --shadow: 0 20px 55px rgba(42, 63, 84, 0.12);
      --radius: 24px;
    }

    * { box-sizing: border-box; }
    html, body { margin: 0; min-height: 100%; }
    body {
      overflow-x: hidden;
      font-family: "Trebuchet MS", "Segoe UI", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at top left, rgba(91, 141, 239, 0.18), transparent 22%),
        radial-gradient(circle at top right, rgba(236, 111, 145, 0.12), transparent 18%),
        linear-gradient(180deg, #f7fbfe 0%, var(--bg) 100%);
    }

    img { max-width: 100%; }
    button, input, select, textarea { font: inherit; }
    button {
      appearance: none;
      border: 0;
      border-radius: 16px;
      padding: 12px 16px;
      cursor: pointer;
      font-weight: 800;
      transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
    }
    button:hover:not(:disabled) { transform: translateY(-1px); }
    button:disabled { opacity: 0.55; cursor: not-allowed; }
    .btn-primary { background: linear-gradient(135deg, var(--orange), var(--orange-deep)); color: #fff; }
    .btn-secondary { background: linear-gradient(135deg, #68b7f0, #4d8fdd); color: #fff; }
    .btn-light { background: #f8ead6; color: var(--ink); }
    .btn-pink { background: linear-gradient(135deg, #ff8fa3, var(--berry)); color: #fff; }
    .btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--ink); }

    .app {
      width: min(1520px, calc(100% - 24px));
      margin: 12px auto;
      display: grid;
      gap: 18px;
    }

    .topbar {
      position: sticky;
      top: 10px;
      z-index: 20;
      display: flex;
      justify-content: space-between;
      gap: 14px;
      align-items: center;
      flex-wrap: wrap;
      padding: 14px 18px;
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--line);
      border-radius: 20px;
      box-shadow: var(--shadow);
      backdrop-filter: blur(12px);
    }

    .brand {
      display: grid;
      gap: 4px;
    }

    .eyebrow {
      display: inline-block;
      width: fit-content;
      padding: 6px 12px;
      border-radius: 999px;
      background: rgba(255, 159, 67, 0.18);
      color: var(--orange-deep);
      font-size: 0.74rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      font-weight: 800;
    }

    .brand h1 {
      margin: 0;
      font-size: clamp(1.7rem, 3.2vw, 2.7rem);
      line-height: 0.95;
    }

    .brand p, .meta-note {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
      line-height: 1.55;
    }

    .topbar-tools {
      display: flex;
      gap: 10px;
      align-items: center;
      flex-wrap: wrap;
    }

    .topbar-tools select {
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 10px 12px;
      background: #fff;
      color: var(--ink);
    }

    .home {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 18px;
    }

    .card {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
      backdrop-filter: blur(10px);
    }

    .hero {
      display: grid;
      grid-template-columns: minmax(280px, 430px) 1fr;
      gap: 20px;
      padding: 22px;
      align-items: center;
      background: linear-gradient(135deg, rgba(255,255,255,0.96), rgba(239,245,251,0.96));
    }

    .hero img {
      width: 100%;
      border-radius: 20px;
      border: 1px solid var(--line);
      background: #fff;
    }

    .hero-copy h2 {
      margin: 0 0 12px;
      font-size: clamp(2rem, 5vw, 4.4rem);
      line-height: 0.9;
    }

    .hero-copy p {
      margin: 0 0 12px;
      color: var(--muted);
      font-size: 1rem;
      line-height: 1.7;
      max-width: 60ch;
    }

    .action-row, .chip-row, .tool-row, .swatches, .stickers {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .chip {
      padding: 8px 12px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.9rem;
      font-weight: 700;
    }

    .side-stack {
      display: grid;
      gap: 18px;
    }

    .mini-card {
      padding: 18px;
      display: grid;
      gap: 12px;
    }

    .mini-card h3, .studio-panel h3 {
      margin: 0;
      font-size: 1rem;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--orange-deep);
    }

    .studio {
      display: none;
      grid-template-columns: 320px 1fr;
      gap: 18px;
      align-items: start;
    }

    .studio.active { display: grid; }

    .studio-panel {
      padding: 18px;
      position: sticky;
      top: 12px;
      max-height: calc(100vh - 24px);
      overflow: auto;
    }

    .tool-section {
      display: grid;
      gap: 12px;
      margin-bottom: 18px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--line);
    }

    .tool-section:last-child {
      margin-bottom: 0;
      padding-bottom: 0;
      border-bottom: 0;
    }

    .swatch, .sticker-btn {
      width: 36px;
      height: 36px;
      min-width: 36px;
      border-radius: 50%;
      padding: 0;
      display: grid;
      place-items: center;
      border: 2px solid rgba(0,0,0,0.08);
      background: #fff;
      font-size: 1rem;
    }

    .swatch.active, .sticker-btn.active {
      outline: 3px solid rgba(255, 159, 67, 0.24);
    }

    .range-wrap {
      display: grid;
      gap: 8px;
    }

    .range-wrap input[type="range"] {
      width: 100%;
    }

    .control-grid {
      display: grid;
      gap: 10px;
    }

    .color-wheel-row {
      display: grid;
      grid-template-columns: 68px 1fr;
      gap: 12px;
      align-items: center;
    }

    .color-wheel {
      width: 68px;
      height: 68px;
      padding: 0;
      border: 0;
      background: transparent;
      border-radius: 50%;
      overflow: hidden;
      cursor: pointer;
    }

    .color-readout {
      display: grid;
      gap: 6px;
    }

    .color-chip {
      width: 100%;
      height: 18px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: #fff;
    }

    .pro-note {
      font-size: 0.82rem;
      color: var(--muted);
      line-height: 1.5;
    }

    .thumb-grid {
      display: flex;
      gap: 10px;
      overflow-x: auto;
      padding-bottom: 6px;
      scroll-snap-type: x proximity;
    }

    .thumb-grid::-webkit-scrollbar {
      height: 10px;
    }

    .thumb-grid::-webkit-scrollbar-thumb {
      background: rgba(91, 141, 239, 0.25);
      border-radius: 999px;
    }

    .thumb {
      display: grid;
      grid-template-columns: 70px 1fr;
      gap: 10px;
      align-items: center;
      padding: 8px;
      min-width: 210px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.75);
      cursor: pointer;
      transition: border-color 0.18s ease, transform 0.18s ease;
      scroll-snap-align: start;
    }

    .thumb:hover { transform: translateY(-1px); border-color: rgba(255,159,67,0.5); }
    .thumb.active { border-color: var(--orange); background: rgba(255, 159, 67, 0.08); }
    .thumb img {
      width: 100%;
      height: 96px;
      object-fit: cover;
      border-radius: 10px;
      border: 1px solid var(--line);
      background: #fff;
    }

    .thumb-title {
      font-weight: 800;
      margin-bottom: 4px;
      font-size: 0.95rem;
    }

    .thumb-meta {
      font-size: 0.82rem;
      color: var(--muted);
    }

    .studio-main {
      display: grid;
      gap: 16px;
    }

    .studio-topbar {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      flex-wrap: wrap;
      padding: 14px 16px;
      background: linear-gradient(135deg, rgba(255,255,255,0.98), rgba(237,244,249,0.98));
    }

    .page-stage {
      padding: 16px;
      min-height: 70vh;
    }

    .frame-shell {
      display: grid;
      grid-template-columns: 148px minmax(0, 1fr);
      gap: 14px;
      align-items: stretch;
    }

    .frame-tools {
      display: grid;
      align-content: start;
      justify-items: center;
      gap: 10px;
      padding: 10px 12px;
      max-height: clamp(520px, 70vh, 820px);
      overflow: auto;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.92);
      border: 1px solid var(--line);
      box-shadow: 0 12px 30px rgba(42, 63, 84, 0.14);
      backdrop-filter: blur(10px);
    }

    .frame-tool-group {
      width: 100%;
      display: grid;
      gap: 8px;
    }

    .frame-tool-label {
      text-align: center;
      font-size: 0.72rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
      font-weight: 800;
    }

    .frame-tools .btn-primary {
      box-shadow: none;
    }

    .frame-tool-btn {
      width: 100%;
      min-height: 40px;
      border-radius: 14px;
      padding: 10px 12px;
      font-size: 0.88rem;
      line-height: 1.1;
    }

    .zoom-mini {
      width: 100%;
    }

    .icon-btn {
      width: 42px;
      height: 42px;
      min-width: 42px;
      padding: 0;
      border-radius: 50%;
      display: grid;
      place-items: center;
      font-size: 1.1rem;
    }

    .canvas-wrap {
      width: 100%;
      height: clamp(520px, 70vh, 820px);
      overflow: auto;
      padding: 8px;
      border-radius: 22px;
      background:
        linear-gradient(0deg, rgba(222, 231, 239, 0.7), rgba(222, 231, 239, 0.7)),
        linear-gradient(90deg, rgba(255,255,255,0.55) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.55) 1px, transparent 1px);
      background-size: auto, 24px 24px, 24px 24px;
      border: 1px solid rgba(140, 160, 178, 0.32);
      overscroll-behavior: contain;
    }

    .page-viewport {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      min-width: 100%;
      min-height: 100%;
    }

    .frame-canvas {
      position: relative;
      min-width: 0;
    }

    .canvas-wrap.pan-active {
      cursor: grab;
    }

    .canvas-wrap.panning {
      cursor: grabbing;
      user-select: none;
    }

    .page-frame {
      position: relative;
      display: inline-block;
      line-height: 0;
      transform-origin: top left;
    }

    .frame-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      z-index: 4;
      box-shadow: 0 12px 28px rgba(42, 63, 84, 0.18);
    }

    .frame-nav.prev {
      left: 10px;
    }

    .frame-nav.next {
      right: 10px;
    }

    .page-base, .paint-canvas {
      display: block;
      border-radius: 14px;
      box-shadow: 0 14px 30px rgba(44, 29, 22, 0.08);
    }

    .page-base {
      position: relative;
      z-index: 1;
      background: #fff;
      border: 1px solid var(--line);
    }
    .paint-canvas {
      position: absolute;
      z-index: 2;
      top: 0;
      left: 0;
      touch-action: none;
      cursor: crosshair;
      background: transparent;
    }

    .page-info {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 14px;
      color: var(--muted);
      font-size: 0.95rem;
    }

    .filmstrip {
      display: grid;
      gap: 10px;
      margin-top: 12px;
      padding: 14px;
      border-radius: 18px;
      background: rgba(255,255,255,0.72);
      border: 1px solid var(--line);
    }

    .filmstrip-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .carousel-tools {
      display: flex;
      gap: 8px;
      align-items: center;
    }

    .thumb-grid-wrap {
      position: relative;
      padding: 0 50px;
    }

    .strip-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      z-index: 2;
      box-shadow: 0 12px 24px rgba(42, 63, 84, 0.14);
    }

    .strip-nav.prev {
      left: 0;
    }

    .strip-nav.next {
      right: 0;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
      gap: 12px;
    }

    .gallery-card {
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255,255,255,0.8);
      padding: 10px;
      display: grid;
      gap: 8px;
    }

    .gallery-card img {
      width: 100%;
      aspect-ratio: 3 / 4;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid var(--line);
      background: #fff;
    }

    .gallery-card strong {
      font-size: 0.92rem;
    }

    .gallery-card span {
      font-size: 0.8rem;
      color: var(--muted);
    }

    .preview-demo {
      display: grid;
      gap: 10px;
    }

    .preview-demo img {
      width: 100%;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: 0 14px 28px rgba(42, 63, 84, 0.08);
    }

    .trial-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .trial-card {
      border: 1px solid var(--line);
      border-radius: 16px;
      background: rgba(255,255,255,0.82);
      padding: 8px;
      display: grid;
      gap: 8px;
      text-align: left;
    }

    .trial-card img {
      width: 100%;
      aspect-ratio: 3 / 4;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid var(--line);
      background: #fff;
    }

    .trial-card strong {
      font-size: 0.88rem;
    }

    .locked-note {
      padding: 12px;
      border-radius: 14px;
      border: 1px dashed rgba(166, 63, 103, 0.35);
      background: rgba(255, 143, 163, 0.08);
      color: var(--berry);
      font-weight: 700;
      line-height: 1.5;
    }

    .subscription {
      display: grid;
      gap: 14px;
    }

    .payment-stack {
      display: grid;
      gap: 10px;
    }

    .payment-note {
      font-size: 0.82rem;
      color: var(--muted);
      line-height: 1.5;
    }

    .plan-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 12px;
    }

    .plan {
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255,255,255,0.82);
      display: grid;
      gap: 8px;
    }

    .plan.popular {
      border-color: rgba(255, 159, 67, 0.6);
      background: rgba(255, 199, 95, 0.12);
    }

    .plan-price {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--berry);
    }

    .hidden { display: none !important; }

    @media (max-width: 1160px) {
      .home, .studio { grid-template-columns: 1fr; }
      .studio-panel { position: relative; top: 0; max-height: none; }
    }

    @media (max-width: 860px) {
      .hero { grid-template-columns: 1fr; }
      .thumb { grid-template-columns: 84px 1fr; }
      .trial-grid { grid-template-columns: 1fr; }
      .page-stage { min-height: 56vh; }
      .frame-shell { grid-template-columns: 1fr; }
      .frame-tools {
        max-height: none;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        align-content: start;
        justify-items: stretch;
      }
      .frame-tool-group { grid-column: 1 / -1; }
      .frame-tool-label { text-align: left; }
      .frame-nav.prev {
        left: 6px;
      }
      .frame-nav.next {
        right: 6px;
      }
    }

    @media (max-width: 640px) {
      .app {
        width: min(100%, calc(100% - 12px));
        margin: 6px auto 18px;
        gap: 12px;
      }

      .topbar,
      .hero,
      .mini-card,
      .studio-panel,
      .studio-topbar,
      .page-stage {
        border-radius: 18px;
      }

      .topbar {
        top: 6px;
        padding: 12px;
      }

      .topbar-tools {
        width: 100%;
      }

      .topbar-tools > * {
        flex: 1 1 calc(50% - 10px);
      }

      .action-row > button,
      .tool-row > button {
        flex: 1 1 100%;
      }

      .page-stage {
        padding: 10px;
      }

      .canvas-wrap {
        height: min(70vh, 560px);
        padding: 6px;
      }

      .thumb-grid-wrap {
        padding: 0 38px;
      }

      .strip-nav,
      .frame-nav {
        width: 38px;
        height: 38px;
        min-width: 38px;
      }
    }