:root {
    --bg: #0B0E14; --surface: #12151C; --surface-2: #171B23;
    --ink: #F2F3F5; --ink-soft: #9AA0AC; --border: rgba(255,255,255,.10);
    --field: #F4F8F4; --accent: #FF5A1F; --accent-text: #FF5A1F; --accent-ink: #0B0E14; --focus: #FF5A1F;
  }
  :root[data-theme="light"] {
    --bg: #F3F4F6; --surface: #FFFFFF; --surface-2: #F1F2F4;
    --ink: #12151C; --ink-soft: #5B616B; --border: #E2E4E8;
    --field: #F4F8F4; --accent: #FF5A1F; --accent-text: #C24518; --accent-ink: #12151C;
  }
  @media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
      --bg: #F3F4F6; --surface: #FFFFFF; --surface-2: #F1F2F4;
      --ink: #12151C; --ink-soft: #5B616B; --border: #E2E4E8;
      --field: #F4F8F4; --accent: #FF5A1F; --accent-text: #C24518; --accent-ink: #12151C;
    }
  }
  * { box-sizing: border-box; }
  html, body {
    margin: 0; padding: 0; background: var(--bg); color: var(--ink); min-height: 100%;
    font-family: 'Barlow Condensed', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  }
  .app-nav {
    display: flex; align-items: center; gap: .1rem; padding: 0 1.1rem; min-height: 3.2rem; flex-wrap: wrap;
    background: var(--surface); color: var(--ink); font-size: .85rem; border-bottom: 1px solid var(--border);
  }
  .app-nav a { color: var(--ink); text-decoration: none; opacity: .65; padding: 0 .85rem; height: 3.2rem; display: flex; align-items: center; text-transform: uppercase; font-weight: 600; letter-spacing: .04em; font-size: .78rem; border-bottom: 3px solid transparent; }
  .app-nav a.current { opacity: 1; background: none; color: var(--accent-text); border-bottom-color: var(--accent); }
  .new-badge { display:inline-block; background:var(--accent); color:var(--accent-ink); font-size:.6rem; font-weight:700; padding:.12rem .4rem; margin-left:.4rem; text-transform:uppercase; letter-spacing:.02em; vertical-align:middle; }
  .app-nav a:hover { opacity: 1; }
  .nav-dropdown { position: relative; display: inline-block; }
  .nav-dropdown-toggle { font-family: inherit; background: none; border: none; color: var(--ink); opacity: .65; padding: 0 .85rem; height: 3.2rem; text-transform: uppercase; font-weight: 600; letter-spacing: .04em; font-size: .78rem; border-bottom: 3px solid transparent; cursor: pointer; }
  .nav-dropdown-toggle:hover { opacity: 1; }
  .nav-dropdown-toggle.current, .nav-dropdown.open .nav-dropdown-toggle { opacity: 1; color: var(--accent-text); border-bottom-color: var(--accent); }
  .nav-dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: var(--surface); border: 1px solid var(--border); min-width: 170px; box-shadow: 0 10px 24px rgba(0,0,0,.35); z-index: 60; padding: .35rem; margin-top: 0; flex-direction: column; gap: .1rem; }
  .nav-dropdown.open .nav-dropdown-menu { display: flex; }
  .nav-dropdown-menu a { color: var(--ink); text-decoration: none; opacity: .85; padding: .5rem .7rem; height: auto; border-bottom: none; text-transform: none; font-weight: 500; letter-spacing: 0; font-size: .85rem; white-space: nowrap; }
  .nav-dropdown-menu a:hover { opacity: 1; background: var(--surface-2); }
  .nav-dropdown-menu a.current { opacity: 1; background: var(--surface-2); font-weight: 600; border-bottom: none; }
  .theme-toggle-btn { background: transparent; color: var(--ink); border: 1px solid var(--border); padding: .3rem .7rem; border-radius: 0; font-size: .72rem; cursor: pointer; font-family: inherit; text-transform: uppercase; letter-spacing: .03em; }
  .global-search-input { margin-left: auto; background: var(--surface-2); border: 1px solid var(--border); color: var(--ink); padding: .35rem .7rem; border-radius: 0; font-size: .78rem; width: 9rem; font-family: inherit; }
  .global-search-input::placeholder { color: var(--ink-soft); }
  .global-search-input:focus { outline: none; border-color: var(--accent); }
  .theme-toggle-btn:hover { border-color: var(--accent); color: var(--accent-text); }
  #helpBtn + #themeToggleBtn { margin-left: .35rem; }
  .update-banner { position: fixed; left: 0; right: 0; bottom: 0; z-index: 300; background: var(--surface); color: var(--ink); padding: .7rem 1rem; display: flex; align-items: center; justify-content: center; gap: .9rem; font-size: .85rem; box-shadow: 0 -4px 14px rgba(0,0,0,.4); border-top: 1px solid var(--border); }
  .update-banner button { background: var(--accent); color: var(--accent-ink); border: none; padding: .35rem .8rem; border-radius: 0; font-family: inherit; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; cursor: pointer; font-size: .8rem; }

  .help-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 90; align-items: center; justify-content: center; padding: 1rem; }
  .help-overlay.open { display: flex; }
  .help-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 0; padding: 1.2rem 1.3rem; max-width: 480px; width: 100%; max-height: 82vh; overflow-y: auto; box-shadow: 0 12px 32px rgba(0,0,0,.5); }
  .help-panel h2 { font-family: 'Anton', sans-serif; font-weight: 400; text-transform: uppercase; letter-spacing: .02em; font-size: 1.15rem; margin: 0 0 .8rem; display: flex; align-items: center; justify-content: space-between; color: var(--ink); }
  .help-panel h3 { font-family: 'Barlow Condensed', sans-serif; font-weight: 700; font-size: .8rem; color: var(--accent-text); margin: 1rem 0 .4rem; text-transform: uppercase; letter-spacing: .05em; }
  .help-panel h3:first-of-type { margin-top: 0; }
  .help-panel ul { margin: 0; padding-left: 1.1rem; font-size: .85rem; line-height: 1.65; color: var(--ink); }
  .help-panel kbd { background: var(--surface-2); border: 1px solid var(--border); border-radius: 3px; padding: .05rem .4rem; font-family: inherit; font-size: .8rem; }
  .help-panel .close-x { background: none; border: none; font-size: 1.1rem; cursor: pointer; color: var(--ink); line-height: 1; }


  .hero {
    max-width: 640px; margin: 0 auto; padding: 3.2rem 1.2rem 1rem; text-align: center;
  }
  .hero h1 {
    font-family: 'Anton', sans-serif; font-weight: 400; font-size: 2.5rem; text-transform: uppercase;
    margin: 0 0 .5rem; letter-spacing: .01em; line-height: 1;
  }
  .hero p { color: var(--ink-soft); font-size: 1rem; margin: 0; }

  .cards {
    max-width: 640px; margin: 2rem auto 3rem; padding: 0 1.2rem;
    display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border);
  }
  @media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }

  .card {
    display: block; background: var(--surface); border: none; border-radius: 0;
    padding: 1.5rem 1.2rem; text-decoration: none; color: var(--ink);
    transition: background .15s ease;
  }
  .card:hover { background: var(--surface-2); }
  a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
  .card .icon { font-size: 2.2rem; display: block; margin-bottom: .6rem; }
  .card h2 { font-family: 'Anton', sans-serif; font-weight: 400; text-transform: uppercase; letter-spacing: .01em; font-size: 1.1rem; margin: 0 0 .35rem; }
  .card p { font-size: .82rem; color: var(--ink-soft); margin: 0; line-height: 1.4; }

  .card.disabled { opacity: .55; cursor: not-allowed; }
  .card.disabled:hover { background: var(--surface); }
  .badge {
    display: inline-block; font-size: .68rem; text-transform: uppercase; letter-spacing: .08em;
    background: var(--accent); color: var(--accent-ink); font-weight: 700; padding: .2rem .55rem; border-radius: 0; margin-bottom: .6rem;
  }

  footer { text-align: center; font-size: .72rem; color: var(--ink-soft); padding: 0 1rem 2rem; }
  footer a { color: var(--ink-soft); }

  .tour-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 150; align-items: center; justify-content: center; padding: 1rem; }
  .tour-overlay.open { display: flex; }
  .tour-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 0; padding: 1.6rem 1.5rem 1.3rem; max-width: 460px; width: 100%; box-shadow: 0 16px 40px rgba(0,0,0,.5); text-align: center; }
  .tour-icon { font-size: 2.6rem; display: block; margin-bottom: .7rem; }
  .tour-panel h2 { font-family: 'Anton', sans-serif; font-weight: 400; text-transform: uppercase; font-size: 1.3rem; margin: 0 0 .6rem; }
  .tour-panel p { font-size: .9rem; color: var(--ink-soft); line-height: 1.55; margin: 0 0 1.2rem; }
  .tour-dots { display: flex; gap: .4rem; justify-content: center; margin-bottom: 1.1rem; }
  .tour-dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--border); transition: background .15s ease, transform .15s ease; }
  .tour-dot.active { background: var(--accent); transform: scale(1.3); }
  .tour-actions { display: flex; align-items: center; justify-content: space-between; gap: .6rem; }
  .tour-actions .tour-skip { background: none; border: none; box-shadow: none; text-transform: none; font-weight: 500; color: var(--ink-soft); text-decoration: underline; letter-spacing: 0; }
  .tour-actions .tour-nav-group { display: flex; gap: .5rem; margin-left: auto; }
  #replayTourBtn { background: none; border: none; box-shadow: none; color: var(--ink-soft); text-transform: none; letter-spacing: 0; font-weight: 500; cursor: pointer; font-family: inherit; font-size: .78rem; text-decoration: underline; padding: .3rem 0 0; }
  #replayTourBtn:hover { color: var(--accent-text); }