*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --bg:        #0d0f14;
      --surface:   #13161e;
      --card:      #1a1e2a;
      --card-hover:#1f2435;
      --border:    #252a38;
      --border-hi: #3a4158;
      --accent:    #5b8fff;
      --accent2:   #ff6b6b;
      --accent3:   #43e8b0;
      --text:      #e8eaf2;
      --muted:     #6b7394;
      --label-bg:  rgba(91,143,255,.13);
    }

    html { font-size: 16px; }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'Syne', sans-serif;
      min-height: 100vh;
      padding: 0;
      overflow-x: hidden;
    }

    /* ── NOISE TEXTURE ── */
    body::before {
      content: '';
      position: fixed; inset: 0;
      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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 0;
    }

    /* ── HEADER ── */
    header {
      position: relative;
      z-index: 10;
      padding: 2.5rem 2rem 1.5rem;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
      border-bottom: 1px solid var(--border);
    }

    .header-left h1 {
      font-size: clamp(1.8rem, 5vw, 3rem);
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1;
    }

    .header-left h1 span {
      color: var(--accent);
    }

    .header-left p {
      margin-top: .4rem;
      font-family: 'DM Mono', monospace;
      font-size: .75rem;
      color: var(--muted);
      letter-spacing: .05em;
      text-transform: uppercase;
    }

    /* live UTC pill */
    #utc-pill {
      font-family: 'DM Mono', monospace;
      font-size: .8rem;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: .4rem 1rem;
      color: var(--accent3);
      white-space: nowrap;
    }

    /* ── MAIN ── */
    main {
      position: relative;
      z-index: 10;
      padding: 2rem;
      max-width: 1400px;
      margin: 0 auto;
    }

    /* ── TOOLBAR ── */
    .toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2rem;
    }

    .toolbar-left {
      font-size: .8rem;
      font-family: 'DM Mono', monospace;
      color: var(--muted);
      letter-spacing: .05em;
    }

    .btn-add {
      display: inline-flex;
      align-items: center;
      gap: .5rem;
      background: var(--accent);
      color: #fff;
      border: none;
      border-radius: 10px;
      padding: .65rem 1.3rem;
      font-family: 'Syne', sans-serif;
      font-weight: 700;
      font-size: .9rem;
      cursor: pointer;
      transition: background .2s, transform .15s, box-shadow .2s;
      box-shadow: 0 4px 20px rgba(91,143,255,.3);
    }

    .btn-add:hover { background: #7aa8ff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(91,143,255,.4); }
    .btn-add:active { transform: translateY(0); }

    .btn-add svg { width: 18px; height: 18px; }

    /* ── GRID ── */
    .board {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 1.25rem;
    }

    /* ── CARD ── */
    .clock-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 1.5rem;
      position: relative;
      display: flex;
      flex-direction: column;
      gap: .75rem;
      transition: border-color .2s, background .2s, transform .2s, box-shadow .2s;
      animation: cardIn .35s cubic-bezier(.22,1,.36,1) both;
    }

    @keyframes cardIn {
      from { opacity: 0; transform: translateY(14px) scale(.97); }
      to   { opacity: 1; transform: none; }
    }

    .clock-card:hover {
      background: var(--card-hover);
      border-color: var(--border-hi);
      transform: translateY(-3px);
      box-shadow: 0 12px 40px rgba(0,0,0,.35);
    }

    /* colour accent stripe */
    .clock-card::before {
      content: '';
      position: absolute;
      top: 0; left: 1.5rem; right: 1.5rem;
      height: 2px;
      border-radius: 999px;
      background: var(--stripe, var(--accent));
      opacity: .7;
    }

    /* remove button */
    .btn-remove {
      position: absolute;
      top: .9rem; right: .9rem;
      background: transparent;
      border: none;
      color: var(--muted);
      cursor: pointer;
      padding: .25rem;
      border-radius: 6px;
      line-height: 0;
      opacity: 0;
      transition: opacity .2s, color .2s, background .2s;
    }

    .clock-card:hover .btn-remove { opacity: 1; }
    .btn-remove:hover { color: var(--accent2); background: rgba(255,107,107,.1); }

    /* label */
    .card-label {
      display: inline-flex;
      align-items: center;
      gap: .4rem;
      width: fit-content;
      max-width: 90%;
    }

    .label-text {
      font-size: .75rem;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
      background: var(--label-bg);
      color: var(--accent);
      border-radius: 6px;
      padding: .25rem .6rem;
      border: 1px solid rgba(91,143,255,.2);
      cursor: pointer;
      transition: background .2s;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 160px;
    }

    .label-text:hover { background: rgba(91,143,255,.22); }

    .label-input {
      font-size: .75rem;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
      background: rgba(91,143,255,.1);
      color: var(--accent);
      border: 1px solid var(--accent);
      border-radius: 6px;
      padding: .25rem .6rem;
      font-family: 'Syne', sans-serif;
      outline: none;
      width: 160px;
    }

    /* timezone name */
    .tz-name {
      font-family: 'DM Mono', monospace;
      font-size: .7rem;
      color: var(--muted);
      letter-spacing: .04em;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    /* big time */
    .card-time {
      font-family: 'DM Mono', monospace;
      font-size: clamp(2rem, 5vw, 2.6rem);
      font-weight: 500;
      letter-spacing: -.03em;
      line-height: 1;
      color: var(--text);
    }

    .card-time .seconds {
      font-size: .55em;
      color: var(--muted);
    }

    /* date */
    .card-date {
      font-family: 'DM Mono', monospace;
      font-size: .72rem;
      color: var(--muted);
    }

    /* offset badge */
    .offset-badge {
      display: inline-block;
      font-family: 'DM Mono', monospace;
      font-size: .68rem;
      padding: .18rem .55rem;
      border-radius: 6px;
      border: 1px solid var(--border-hi);
      color: var(--muted);
      margin-top: auto;
      align-self: flex-start;
    }

    /* ── MODAL OVERLAY ── */
    .modal-overlay {
      display: none;
      position: fixed; inset: 0;
      background: rgba(0,0,0,.65);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      z-index: 100;
      align-items: center;
      justify-content: center;
      padding: 1rem;
    }

    .modal-overlay.open { display: flex; }

    .modal {
      background: var(--card);
      border: 1px solid var(--border-hi);
      border-radius: 20px;
      padding: 2rem;
      width: 100%;
      max-width: 480px;
      animation: modalIn .3s cubic-bezier(.22,1,.36,1) both;
    }

    @keyframes modalIn {
      from { opacity: 0; transform: scale(.94) translateY(12px); }
      to   { opacity: 1; transform: none; }
    }

    .modal h2 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 1.5rem;
      letter-spacing: -.02em;
    }

    .form-group {
      margin-bottom: 1.2rem;
    }

    .form-group label {
      display: block;
      font-size: .75rem;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: .5rem;
    }

    .form-group input,
    .form-group select {
      width: 100%;
      background: var(--surface);
      border: 1px solid var(--border-hi);
      border-radius: 10px;
      padding: .75rem 1rem;
      color: var(--text);
      font-family: 'DM Mono', monospace;
      font-size: .9rem;
      outline: none;
      transition: border-color .2s;
      appearance: none;
      -webkit-appearance: none;
    }

    .form-group input:focus,
    .form-group select:focus { border-color: var(--accent); }

    .form-group select option { background: #1a1e2a; }

    .modal-actions {
      display: flex;
      gap: .75rem;
      margin-top: 1.5rem;
    }

    .btn-primary {
      flex: 1;
      background: var(--accent);
      color: #fff;
      border: none;
      border-radius: 10px;
      padding: .75rem;
      font-family: 'Syne', sans-serif;
      font-weight: 700;
      font-size: .95rem;
      cursor: pointer;
      transition: background .2s;
    }

    .btn-primary:hover { background: #7aa8ff; }

    .btn-ghost {
      flex: 1;
      background: transparent;
      color: var(--muted);
      border: 1px solid var(--border-hi);
      border-radius: 10px;
      padding: .75rem;
      font-family: 'Syne', sans-serif;
      font-weight: 600;
      font-size: .95rem;
      cursor: pointer;
      transition: color .2s, border-color .2s;
    }

    .btn-ghost:hover { color: var(--text); border-color: var(--text); }

    /* ── EMPTY STATE ── */
    .empty-state {
      grid-column: 1/-1;
      text-align: center;
      padding: 4rem 2rem;
      color: var(--muted);
    }

    .empty-state svg { opacity: .3; margin-bottom: 1rem; }
    .empty-state p { font-size: .9rem; }

    /* ── TIME SCRUBBER ── */
    .scrubber-bar {
      position: relative;
      z-index: 10;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: .85rem 2rem;
      display: flex;
      align-items: center;
      gap: 1.25rem;
      flex-wrap: wrap;
      transition: background .3s;
    }

    .scrubber-bar.active {
      background: rgba(91,143,255,.07);
      border-bottom-color: rgba(91,143,255,.35);
    }

    .scrubber-label {
      font-family: 'DM Mono', monospace;
      font-size: .7rem;
      letter-spacing: .07em;
      text-transform: uppercase;
      color: var(--muted);
      white-space: nowrap;
      flex-shrink: 0;
    }

    .scrubber-label strong {
      color: var(--accent);
      font-weight: 700;
    }

    .scrubber-time-input {
      font-family: 'DM Mono', monospace;
      font-size: 1.05rem;
      font-weight: 500;
      background: var(--card);
      border: 1px solid var(--border-hi);
      border-radius: 10px;
      color: var(--text);
      padding: .35rem .8rem;
      outline: none;
      width: 110px;
      flex-shrink: 0;
      transition: border-color .2s, opacity .2s;
      cursor: pointer;
    }

    .scrubber-time-input:focus { border-color: var(--accent); }
    .scrubber-time-input:disabled { opacity: .35; cursor: not-allowed; }

    /* custom range slider */
    .scrubber-range {
      flex: 1;
      min-width: 120px;
      -webkit-appearance: none;
      appearance: none;
      height: 4px;
      border-radius: 999px;
      background: var(--border-hi);
      outline: none;
      cursor: pointer;
      transition: opacity .2s;
    }

    .scrubber-range:disabled { opacity: .3; cursor: not-allowed; }

    .scrubber-range::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 18px; height: 18px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 3px rgba(91,143,255,.25);
      cursor: pointer;
      transition: box-shadow .2s, background .2s;
    }

    .scrubber-range:not(:disabled)::-webkit-slider-thumb:hover {
      box-shadow: 0 0 0 6px rgba(91,143,255,.3);
      background: #7aa8ff;
    }

    .scrubber-range::-moz-range-thumb {
      width: 18px; height: 18px;
      border-radius: 50%;
      background: var(--accent);
      border: none;
      box-shadow: 0 0 0 3px rgba(91,143,255,.25);
      cursor: pointer;
    }

    /* toggle button */
    .btn-scrub-toggle {
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      font-family: 'Syne', sans-serif;
      font-weight: 700;
      font-size: .8rem;
      border-radius: 8px;
      padding: .45rem 1rem;
      border: 1px solid var(--border-hi);
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      transition: all .2s;
      white-space: nowrap;
      flex-shrink: 0;
    }

    .btn-scrub-toggle:hover { color: var(--text); border-color: var(--text); }

    .btn-scrub-toggle.on {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
      box-shadow: 0 4px 16px rgba(91,143,255,.35);
    }

    .btn-scrub-toggle.on:hover { background: #7aa8ff; }

    /* "SIMULATED" badge on cards when scrubber is active */
    .scrub-active-badge {
      display: none;
      position: fixed;
      bottom: 1.25rem;
      right: 1.25rem;
      z-index: 50;
      background: var(--accent);
      color: #fff;
      font-family: 'DM Mono', monospace;
      font-size: .7rem;
      letter-spacing: .1em;
      text-transform: uppercase;
      padding: .4rem .9rem;
      border-radius: 999px;
      box-shadow: 0 4px 20px rgba(91,143,255,.4);
      animation: pulse 2s ease-in-out infinite;
      pointer-events: none;
    }

    .scrub-active-badge.visible { display: block; }

    @keyframes pulse {
      0%, 100% { box-shadow: 0 4px 20px rgba(91,143,255,.4); }
      50% { box-shadow: 0 4px 30px rgba(91,143,255,.7); }
    }

    @media (max-width: 600px) {
      .scrubber-bar { padding: .75rem 1rem; gap: .75rem; }
      .scrubber-range { min-width: 80px; }
    }

    /* ── SCROLLBAR ── */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg); }
    ::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 999px; }

    /* ── RESPONSIVE ── */
    @media (max-width: 600px) {
      header { padding: 1.5rem 1rem 1rem; }
      main { padding: 1.25rem 1rem; }
      .board { grid-template-columns: 1fr 1fr; gap: .85rem; }
      .clock-card { padding: 1.1rem; }
      .card-time { font-size: 1.5rem; }
    }

    @media (max-width: 380px) {
      .board { grid-template-columns: 1fr; }
    }