:root {
      --bg: #0a0a0f;
      --surface: #13131a;
      --surface2: #1c1c28;
      --border: #2a2a3a;
      --accent: #6c63ff;
      --accent2: #ff6584;
      --accent3: #43e97b;
      --text: #f0f0f8;
      --muted: #7a7a9a;
      --card-glow: 0 0 40px rgba(108,99,255,0.12);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; overflow-x: hidden; }
    body::before {
      content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: 0.5;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
    }
    nav {
      position: sticky; top: 0; z-index: 100;
      background: rgba(10,10,15,0.88); backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border);
      padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 60px;
    }
    .nav-logo {
      font-family: 'Syne', sans-serif; font-weight: 800; font-size: 1.3rem; letter-spacing: -0.5px;
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .nav-tabs { display: flex; gap: 4px; background: var(--surface); border-radius: 12px; padding: 4px; border: 1px solid var(--border); }
    .nav-tab {
      font-family: 'DM Sans', sans-serif; font-size: 0.78rem; font-weight: 600;
      padding: 6px 12px; border-radius: 8px; border: none; cursor: pointer;
      transition: all 0.2s; color: var(--muted); background: transparent; white-space: nowrap;
    }
    .nav-tab.active { background: var(--accent); color: #fff; }
    .nav-tab:hover:not(.active) { color: var(--text); background: var(--surface2); }
    .lang-btn {
      font-size: 0.75rem; padding: 6px 10px; background: var(--surface2);
      border: 1px solid var(--border); border-radius: 8px; color: var(--muted);
      cursor: pointer; transition: all 0.2s; font-family: 'DM Sans', sans-serif;
    }
    .lang-btn:hover { color: var(--text); border-color: var(--accent); }
    .nav-right { display: flex; gap: 8px; align-items: center; }

    .hero { text-align: center; padding: 48px 20px 32px; position: relative; z-index: 1; }
    .hero-badge {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 0.75rem; font-weight: 600; color: var(--accent);
      background: rgba(108,99,255,0.12); border: 1px solid rgba(108,99,255,0.3);
      border-radius: 20px; padding: 4px 12px; margin-bottom: 16px; letter-spacing: 0.5px;
    }
    .hero h1 {
      font-family: 'Syne', sans-serif; font-weight: 800;
      font-size: clamp(1.8rem, 5vw, 3rem); line-height: 1.1; letter-spacing: -1px; margin-bottom: 10px;
    }
    .hero h1 span {
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .hero p { color: var(--muted); font-size: 0.95rem; max-width: 420px; margin: 0 auto; line-height: 1.6; }

    .ad-banner {
      margin: 0 auto 24px; background: var(--surface); border: 1px solid var(--border);
      border-radius: 12px; height: 80px; display: flex; align-items: center; justify-content: center;
      color: var(--muted); font-size: 0.75rem; letter-spacing: 1px; text-transform: uppercase; max-width: 728px;
    }

    .page { display: none; animation: fadeUp 0.35s ease; }
    .page.active { display: block; }
    @keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

    .tool-card {
      background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
      padding: 28px 24px; max-width: 520px; margin: 0 auto 24px;
      box-shadow: var(--card-glow); position: relative; z-index: 1;
    }
    .tool-header { margin-bottom: 22px; }
    .tool-label { font-size: 0.7rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
    .tool-title { font-family: 'Syne', sans-serif; font-size: 1.5rem; font-weight: 800; letter-spacing: -0.5px; }
    .tool-sub { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }
    .title-row { display: flex; align-items: center; gap: 10px; }
    .badge-4k {
      font-size: 0.68rem; font-weight: 700; padding: 3px 8px; border-radius: 6px; letter-spacing: 0.5px;
      background: linear-gradient(135deg, rgba(255,101,132,0.18), rgba(108,99,255,0.18));
      color: var(--accent2); border: 1px solid rgba(255,101,132,0.3);
    }

    .drop-zone {
      border: 2px dashed var(--border); border-radius: 14px; padding: 32px 20px;
      text-align: center; cursor: pointer; transition: all 0.25s;
      background: var(--surface2); margin-bottom: 16px; position: relative; overflow: hidden;
    }
    .drop-zone:hover, .drop-zone.dragover { border-color: var(--accent); background: rgba(108,99,255,0.06); }
    .drop-zone.has-file { border-color: var(--accent3); background: rgba(67,233,123,0.06); }
    .drop-zone.error-state { border-color: var(--accent2); background: rgba(255,101,132,0.06); }
    .drop-icon { font-size: 2rem; margin-bottom: 8px; display: block; }
    .drop-title { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
    .drop-sub { color: var(--muted); font-size: 0.78rem; }
    .drop-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
    .drop-filename { margin-top: 8px; font-size: 0.78rem; color: var(--accent3); font-weight: 500; display: none; }
    .drop-error { margin-top: 8px; font-size: 0.78rem; color: var(--accent2); font-weight: 600; display: none; }

    .info-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
    .info-chip {
      font-size: 0.72rem; font-weight: 600; padding: 4px 10px; border-radius: 6px;
      background: rgba(108,99,255,0.1); color: var(--accent); border: 1px solid rgba(108,99,255,0.2);
    }

    .sec-label { font-size: 0.8rem; color: var(--muted); font-weight: 600; display: block; margin-bottom: 8px; }

    .bg-options { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
    .bg-opt {
      flex: 1; min-width: 68px; padding: 10px 6px; border-radius: 10px;
      border: 2px solid var(--border); background: var(--surface2); color: var(--muted);
      font-size: 0.78rem; font-weight: 600; cursor: pointer; transition: all 0.2s;
      text-align: center; font-family: 'DM Sans', sans-serif;
    }
    .bg-opt.selected { border-color: var(--accent); color: var(--accent); background: rgba(108,99,255,0.1); }

    .media-type-row { display: flex; gap: 8px; margin-bottom: 16px; }
    .media-type-btn {
      flex: 1; padding: 9px 8px; border-radius: 10px; border: 2px solid var(--border);
      background: var(--surface2); color: var(--muted); font-size: 0.8rem; font-weight: 600;
      cursor: pointer; text-align: center; transition: all 0.2s; font-family: 'DM Sans', sans-serif;
    }
    .media-type-btn.selected { border-color: var(--accent2); color: var(--accent2); background: rgba(255,101,132,0.1); }

    .range-row { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
    .range-row label { font-size: 0.82rem; color: var(--muted); font-weight: 500; min-width: 80px; }
    input[type="range"] { flex: 1; accent-color: var(--accent); }
    .range-val { font-size: 0.8rem; font-weight: 700; color: var(--accent); min-width: 36px; text-align: right; }

    .btn-primary {
      width: 100%; padding: 13px; border-radius: 12px; border: none;
      background: var(--accent); color: #fff; font-family: 'DM Sans', sans-serif;
      font-size: 0.95rem; font-weight: 700; cursor: pointer; transition: all 0.2s; letter-spacing: 0.3px;
    }
    .btn-primary:hover { background: #7c74ff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(108,99,255,0.35); }
    .btn-primary:active { transform: translateY(0); }
    .btn-primary.processing { opacity: 0.7; pointer-events: none; }

    .progress-bar { height: 3px; background: var(--border); border-radius: 3px; margin: 12px 0; overflow: hidden; display: none; }
    .progress-bar.show { display: block; }
    .progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 3px; width: 0; transition: width 0.4s ease; }

    .result-area { display: none; margin-top: 20px; background: var(--surface2); border: 1px solid var(--border); border-radius: 14px; padding: 16px; text-align: center; }
    .result-area.show { display: block; animation: fadeUp 0.3s ease; }
    .result-area canvas { max-width: 100%; border-radius: 10px; margin-bottom: 12px; display: block; margin-left: auto; margin-right: auto; }

    .result-meta { display: flex; justify-content: center; gap: 16px; margin-bottom: 14px; flex-wrap: wrap; }
    .meta-chip { font-size: 0.78rem; font-weight: 600; color: var(--muted); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 5px 10px; }
    .meta-chip span { color: var(--accent3); }

    .btn-download {
      display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
      border-radius: 12px; background: var(--accent3); color: #0a0a0f;
      font-family: 'DM Sans', sans-serif; font-weight: 700; font-size: 0.9rem;
      text-decoration: none; transition: all 0.2s; cursor: pointer; border: none;
    }
    .btn-download:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(67,233,123,0.35); }

    .divider { height: 1px; background: var(--border); margin: 18px 0; }

    .size-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 16px; }
    .size-opt { padding: 10px 12px; border-radius: 10px; border: 2px solid var(--border); background: var(--surface2); cursor: pointer; transition: all 0.2s; font-family: 'DM Sans', sans-serif; }
    .size-opt:hover { border-color: var(--accent); }
    .size-opt.selected { border-color: var(--accent); background: rgba(108,99,255,0.1); }
    .size-opt-name { font-size: 0.82rem; font-weight: 700; color: var(--text); }
    .size-opt-dims { font-size: 0.7rem; color: var(--muted); margin-top: 2px; }

    .features { max-width: 520px; margin: 0 auto 32px; padding: 0 20px; }
    .feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .feature-item { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 12px; text-align: center; }
    .feature-icon { font-size: 1.4rem; display: block; margin-bottom: 6px; }
    .feature-text { font-size: 0.73rem; color: var(--muted); font-weight: 500; line-height: 1.4; }

    .ad-bottom {
      margin: 0 auto 32px; background: var(--surface); border: 1px solid var(--border);
      border-radius: 12px; height: 90px; display: flex; align-items: center; justify-content: center;
      color: var(--muted); font-size: 0.7rem; letter-spacing: 1px; text-transform: uppercase; max-width: 520px;
    }

    footer { border-top: 1px solid var(--border); padding: 20px; text-align: center; color: var(--muted); font-size: 0.75rem; position: relative; z-index: 1; }
    footer a { color: var(--accent); text-decoration: none; }

    .toast {
      position: fixed; bottom: 20px; left: 50%;
      transform: translateX(-50%) translateY(80px);
      background: var(--surface2); border: 1px solid var(--border);
      border-radius: 12px; padding: 12px 20px; font-size: 0.85rem; font-weight: 600;
      z-index: 999; transition: transform 0.3s ease; white-space: nowrap;
    }
    .toast.show { transform: translateX(-50%) translateY(0); }
    .toast.error { border-color: var(--accent2); color: var(--accent2); }
    .toast.success { border-color: var(--accent3); color: var(--accent3); }

    .mobile-nav {
      display: none; position: fixed; bottom: 0; left: 0; right: 0;
      background: rgba(10,10,15,0.95); backdrop-filter: blur(20px);
      border-top: 1px solid var(--border); z-index: 100; padding: 8px 12px 14px;
    }
    .mobile-tabs { display: flex; gap: 4px; }
    .mobile-tab {
      flex: 1; padding: 9px 6px; border-radius: 10px; border: none; background: transparent;
      color: var(--muted); font-family: 'DM Sans', sans-serif; font-size: 0.7rem; font-weight: 600;
      cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 3px; transition: all 0.2s;
    }
    .mobile-tab.active { background: rgba(108,99,255,0.15); color: var(--accent); }
    .mobile-tab .tab-icon { font-size: 1.2rem; }

    .spinner { width: 28px; height: 28px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto 8px; }
    @keyframes spin { to { transform: rotate(360deg); } }
    .processing-note { font-size: 0.8rem; color: var(--muted); text-align: center; padding: 16px; display: none; }
    .processing-note.show { display: block; }

    /* AI BG Removal state */
    .ai-state {
      display: none; flex-direction: column; gap: 10px;
      background: rgba(108,99,255,0.07); border: 1px solid rgba(108,99,255,0.2);
      border-radius: 12px; padding: 14px 16px; margin-bottom: 14px;
    }
    .ai-state.show { display: flex; }
    .ai-state-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
    .ai-state-label { font-size: 0.8rem; font-weight: 600; color: var(--accent); display: flex; align-items: center; gap: 6px; }
    .ai-state-label .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1.2s ease-in-out infinite; }
    @keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(0.7); } }
    .ai-state-pct { font-size: 0.78rem; font-weight: 700; color: var(--accent); }
    .ai-progress-track { height: 4px; background: var(--border); border-radius: 4px; overflow: hidden; }
    .ai-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 4px; width: 0%; transition: width 0.3s ease; }
    .ai-step { font-size: 0.74rem; color: var(--muted); }
    .ai-badge {
      display: inline-flex; align-items: center; gap: 5px;
      font-size: 0.68rem; font-weight: 700; padding: 3px 8px; border-radius: 6px;
      background: linear-gradient(135deg, rgba(108,99,255,0.15), rgba(255,101,132,0.15));
      color: var(--accent); border: 1px solid rgba(108,99,255,0.25); letter-spacing: 0.3px;
    }

    .vid-preview-wrap { display: none; border-radius: 10px; overflow: hidden; background: #000; margin-bottom: 14px; }
    .vid-preview-wrap.show { display: block; }
    .vid-preview-wrap video { width: 100%; max-height: 200px; display: block; object-fit: contain; }

    .info-box { background: rgba(108,99,255,0.08); border: 1px solid rgba(108,99,255,0.2); border-radius: 10px; padding: 12px 14px; margin-bottom: 14px; }
    .info-box-title { font-size: 0.75rem; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
    .info-box-body { font-size: 0.74rem; color: var(--muted); line-height: 1.6; }

    @media (max-width: 640px) {
      .nav-tabs { display: none; }
      .mobile-nav { display: block; }
      body { padding-bottom: 80px; }
      .hero { padding: 32px 16px 20px; }
      .tool-card { border-radius: 16px; margin: 0 12px 16px; padding: 22px 18px; }
      .feature-list { grid-template-columns: repeat(3, 1fr); }
      .size-grid { grid-template-columns: repeat(2, 1fr); }
      .ad-banner, .ad-bottom { margin: 0 12px 20px; }
      .features { padding: 0 12px; }
    }
/* ── Additional rules added in v1.1.0 ─────────────────────────────────────── */

/* Ad banner/bottom horizontal padding on mobile */
@media (max-width: 640px) {
  .ad-banner { padding: 0 12px; }
}

/* Status background selector (stBgOpts) — reuses .bg-options styles, no extra needed */
/* but ensure it has consistent bottom margin */
#stBgOpts { margin-bottom: 16px; }

/* Empty ad slots — hide the placeholder box so no grey rectangle shows
   until AdSense code is inserted (remove this rule after inserting ads) */
.ad-banner:empty,
.ad-bottom:empty { display: none; }

/* Ensure canvas inside result area never overflows on very small screens */
.result-area canvas { max-width: 100% !important; height: auto !important; }

/* Improve tap targets on mobile for bg-opt buttons */
@media (max-width: 480px) {
  .bg-opt { padding: 9px 4px; font-size: 0.73rem; min-width: 60px; }
  .media-type-btn { padding: 10px 6px; font-size: 0.78rem; }
  .tool-card { padding: 20px 16px; }
}

/* Video preview inside status page */
.vid-preview-wrap video { width: 100%; max-height: 200px; object-fit: contain; display: block; }

/* Prevent layout shift while AI state bar animates in */
.ai-state { min-height: 0; overflow: hidden; transition: all 0.25s ease; }