:root {
      --bg: #07111f;
      --card: #102033;
      --card2: #132942;
      --accent: #34d399;
      --accent2: #60a5fa;
      --text: #e5f1ff;
      --muted: #91a6bd;
      --danger: #fb7185;
      --yellow: #facc15;
      --orange: #fb923c;
      --ok: #22c55e;
      --bad: #fb7185;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: Arial, Helvetica, sans-serif;
      background: radial-gradient(circle at top, #123252 0%, var(--bg) 60%);
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    .app {
      width: min(1120px, 100%);
      background: rgba(16, 32, 51, 0.94);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 22px;
      box-shadow: 0 25px 80px rgba(0,0,0,0.45);
      overflow: hidden;
    }

    header {
      padding: 22px 26px;
      background: linear-gradient(90deg, rgba(52, 211, 153, 0.12), rgba(96, 165, 250, 0.12));
      border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    header h1 {
      margin: 0;
      font-size: clamp(24px, 3vw, 36px);
      letter-spacing: 0.5px;
    }

    header p {
      margin: 8px 0 0;
      color: var(--muted);
    }

    .content {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 18px;
      padding: 20px;
    }

    .main-card, .settings-card {
      background: rgba(8, 20, 34, 0.72);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 18px;
      padding: 20px;
    }

    .display {
      min-height: 430px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      border-radius: 18px;
      background: linear-gradient(180deg, rgba(19, 41, 66, 0.85), rgba(7, 17, 31, 0.9));
      border: 1px solid rgba(255,255,255,0.09);
      padding: 24px;
      position: relative;
    }

    .big-symbol {
      font-size: clamp(110px, 22vw, 260px);
      line-height: 0.9;
      font-weight: 900;
      color: var(--yellow);
      text-shadow: 0 0 28px rgba(250, 204, 21, 0.25);
      min-height: 220px;
      display: flex;
      align-items: center;
      justify-content: center;
      word-break: break-word;
      max-width: 100%;
    }

    .listen-icon {
      font-size: clamp(90px, 15vw, 180px);
      line-height: 1;
      color: var(--accent2);
      text-shadow: 0 0 30px rgba(96, 165, 250, 0.28);
      margin-bottom: 12px;
    }

    .answer {
      font-size: clamp(34px, 7vw, 82px);
      font-weight: 800;
      color: var(--accent);
      min-height: 92px;
      display: flex;
      align-items: center;
      justify-content: center;
      word-break: break-word;
      max-width: 100%;
    }

    .answer-text {
      font-size: clamp(28px, 5vw, 58px);
      color: var(--yellow);
      font-weight: 900;
    }

    .morse-code {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.22em;
      flex-wrap: wrap;
      min-height: 1em;
      margin: 0 0.16em;
      vertical-align: middle;
    }

    .morse-group {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.18em;
      margin: 0 0.24em 0.18em;
      vertical-align: middle;
    }

    .morse-dot,
    .morse-dash {
      display: inline-block;
      background: currentColor;
      border-radius: 999px;
      box-shadow: 0 0 18px rgba(34, 211, 238, 0.18);
    }

    .morse-dot {
      width: 0.22em;
      height: 0.22em;
    }

    .morse-dash {
      width: 0.98em;
      height: 0.22em;
    }

    .status {
      position: absolute;
      top: 14px;
      left: 16px;
      color: var(--muted);
      font-size: 15px;
    }

    .countdown {
      position: absolute;
      top: 14px;
      right: 16px;
      color: var(--accent2);
      font-size: 18px;
      font-weight: 700;
    }

    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 18px;
      justify-content: center;
    }

    button {
      border: 0;
      border-radius: 12px;
      padding: 13px 18px;
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
      color: #05111d;
      background: var(--accent);
      transition: transform .12s ease, filter .12s ease, opacity .12s ease;
    }

    button:hover { transform: translateY(-1px); filter: brightness(1.08); }
    button:active { transform: translateY(0); }
    button.secondary { background: var(--accent2); }
    button.danger { background: var(--danger); color: white; }
    button.orange { background: var(--orange); color: #1c0b02; }
    button.ghost { background: #223955; color: var(--text); }
    button:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

    .input-panel {
      margin-top: 16px;
      padding: 14px;
      border-radius: 14px;
      background: rgba(255,255,255,0.045);
      border: 1px solid rgba(255,255,255,0.08);
    }

    .input-line {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 10px;
      align-items: center;
    }

    .input-line input {
      min-height: 50px;
      font-size: 24px;
      font-weight: 800;
      text-align: center;
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .feedback {
      margin-top: 10px;
      min-height: 28px;
      font-size: 18px;
      font-weight: 800;
      text-align: center;
    }

    .feedback.ok { color: var(--ok); }
    .feedback.bad { color: var(--bad); }

    .score-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 10px;
      margin-top: 16px;
    }

    .score-card {
      background: rgba(255,255,255,0.055);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 13px;
      padding: 10px;
      text-align: center;
      min-height: 68px;
    }

    .score-label {
      color: var(--muted);
      font-size: 12px;
      margin-bottom: 5px;
    }

    .score-value {
      color: var(--yellow);
      font-size: 24px;
      font-weight: 900;
    }

    .row {
      display: grid;
      grid-template-columns: 1fr 160px;
      align-items: center;
      gap: 14px;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .row:last-child { border-bottom: 0; }

    label {
      color: var(--text);
      font-weight: 700;
    }

    .hint {
      display: block;
      color: var(--muted);
      font-size: 13px;
      font-weight: 400;
      margin-top: 3px;
      line-height: 1.35;
    }

    input, select, textarea {
      width: 100%;
      background: #071523;
      border: 1px solid rgba(255,255,255,0.16);
      color: var(--text);
      border-radius: 10px;
      padding: 10px 11px;
      font-size: 15px;
      outline: none;
    }

    textarea {
      min-height: 76px;
      resize: vertical;
      font-family: Arial, Helvetica, sans-serif;
    }

    input[type="checkbox"] {
      width: 23px;
      height: 23px;
      accent-color: var(--accent);
      justify-self: start;
    }

    .small-note {
      color: var(--muted);
      margin: 16px 0 0;
      font-size: 14px;
      line-height: 1.45;
    }

    .history {
      margin-top: 15px;
      padding: 12px;
      border-radius: 12px;
      background: rgba(255,255,255,0.05);
      color: var(--muted);
      min-height: 48px;
      font-size: 14px;
      line-height: 1.5;
      max-height: 155px;
      overflow-y: auto;
    }

    .history strong { color: var(--text); }
    .good { color: var(--ok); font-weight: 900; }
    .wrong { color: var(--bad); font-weight: 900; }
    .hidden { display: none !important; }

    @media (max-width: 900px) {
      body { padding: 12px; }
      header { padding: 18px 18px; }
      .content { grid-template-columns: 1fr; padding: 14px; gap: 14px; }
      .main-card, .settings-card { padding: 14px; }
      .row { grid-template-columns: 1fr; }
      .display { min-height: 330px; padding: 18px 12px; }
      .big-symbol { min-height: 170px; line-height: 0.82; }
      .answer { min-height: 68px; }
      .morse-code { gap: 0.16em; }
      .score-grid { grid-template-columns: repeat(2, 1fr); }
      .input-line { grid-template-columns: 1fr; }
    }

    @media (max-width: 560px) {
      body { padding: 8px; }
      .app { border-radius: 16px; }
      header p { font-size: 14px; line-height: 1.35; }
      .content { padding: 10px; gap: 10px; }
      .main-card, .settings-card { padding: 10px; border-radius: 14px; }
      .display { min-height: 255px; padding: 14px 8px 10px; border-radius: 14px; }
      .status { top: 9px; left: 10px; font-size: 12px; }
      .countdown { top: 9px; right: 10px; font-size: 14px; }
      .listen-icon { font-size: clamp(58px, 22vw, 105px); margin-bottom: 2px; }
      .big-symbol {
        font-size: clamp(72px, 34vw, 148px);
        min-height: 120px;
        line-height: 0.78;
      }
      .answer {
        font-size: clamp(24px, 10vw, 44px);
        min-height: 44px;
        line-height: 1;
      }
      .answer-text { font-size: clamp(24px, 11vw, 48px); }
      .morse-code { gap: 0.11em; margin: 0 0.08em; }
      .morse-group { gap: 0.10em; margin: 0 0.13em 0.10em; }
      .morse-dot { width: 0.18em; height: 0.18em; }
      .morse-dash { width: 0.78em; height: 0.18em; }
      .controls { gap: 8px; margin-top: 12px; }
      button { padding: 11px 12px; font-size: 14px; border-radius: 10px; }
      .input-panel { margin-top: 12px; padding: 10px; }
      .input-line input { min-height: 44px; font-size: 20px; }
      .history { margin-top: 12px; max-height: 120px; font-size: 13px; }
    }
	
	.settings-card .row.setting-disabled {
      opacity: 0.42;
      filter: grayscale(0.85);
    }

    .settings-card .row.setting-disabled label,
    .settings-card .row.setting-disabled .hint {
      cursor: not-allowed;
    }

    .settings-card .row.setting-disabled input,
    .settings-card .row.setting-disabled select,
    .settings-card .row.setting-disabled textarea {
      cursor: not-allowed;
    }

    .settings-card .row.setting-disabled input:not([type="checkbox"]),
    .settings-card .row.setting-disabled select,
    .settings-card .row.setting-disabled textarea {
      background-image: linear-gradient(135deg, rgba(160,160,160,0.18), rgba(160,160,160,0.08));
    }


    /* Het wacht-/placeholder-vraagteken bewust donkerder dan de gele oefentekens. */
    .big-symbol.placeholder-question {
      color: #173447 !important;
      text-shadow: none !important;
    }


    /* Mobile fix: scorekaartjes compact en naast elkaar, ook als externe CSS op mobiel naar blokweergave schakelt. */
    .score-grid.hidden,
    .input-panel.hidden,
    .history.hidden,
    .reverse-visual-panel.hidden {
      display: none !important;
    }

    .reverse-visual-panel {
      margin: 0.85rem 0 0.25rem;
      padding: 0.75rem 0.85rem;
      border: 1px solid rgba(148, 163, 184, 0.28);
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.045);
    }

    .reverse-visual-panel label {
      display: flex;
      align-items: flex-start;
      gap: 0.6rem;
      cursor: pointer;
      line-height: 1.25;
    }

    .reverse-visual-panel label + label {
      margin-top: 0.65rem;
      padding-top: 0.65rem;
      border-top: 1px solid rgba(148, 163, 184, 0.18);
    }

    .reverse-visual-panel input {
      flex: 0 0 auto;
      margin-top: 0.2rem;
    }

    .reverse-visual-title {
      display: block;
      font-weight: 800;
    }

    .reverse-visual-hint {
      display: block;
      margin-top: 0.16rem;
      font-size: 0.86rem;
      opacity: 0.78;
    }

    @media (max-width: 700px) {
      .main-card,
      .input-panel,
      .score-grid,
      .reverse-visual-panel,
      .controls {
        min-width: 0;
        box-sizing: border-box;
      }

      .input-panel {
        width: 100%;
      }

      .input-line {
        display: grid !important;
        grid-template-columns: 1fr;
        gap: 0.55rem;
        align-items: stretch;
      }

      .input-line input,
      .input-line button {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
      }

      .score-grid:not(.hidden) {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 0.55rem !important;
        margin: 0.85rem 0 1rem !important;
        align-items: stretch !important;
      }

      .score-card {
        display: flex !important;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-width: 0 !important;
        min-height: 72px;
        padding: 0.55rem 0.45rem !important;
        border: 1px solid rgba(148, 163, 184, 0.28);
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.045);
        text-align: center;
        box-sizing: border-box;
      }

      .score-card:last-child {
        grid-column: 1 / -1;
      }

      .score-label {
        line-height: 1.15;
        font-size: 0.82rem;
        opacity: 0.9;
        white-space: nowrap;
      }

      .score-value {
        line-height: 1.05;
        margin-top: 0.2rem;
        font-size: clamp(1.35rem, 8vw, 2.1rem);
        font-weight: 800;
      }

      .controls {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.65rem;
      }

      .controls button {
        width: 100%;
        min-width: 0;
        margin: 0 !important;
        box-sizing: border-box;
      }

      .controls button:nth-child(n+3) {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 380px) {
      .score-label {
        font-size: 0.76rem;
      }

      .score-card {
        min-height: 66px;
        padding-left: 0.35rem !important;
        padding-right: 0.35rem !important;
      }
    }
	
	 .settings-card .row.setting-disabled {
      opacity: 0.42;
      filter: grayscale(0.85);
    }

    .settings-card .row.setting-disabled label,
    .settings-card .row.setting-disabled .hint {
      cursor: not-allowed;
    }

    .settings-card .row.setting-disabled input,
    .settings-card .row.setting-disabled select,
    .settings-card .row.setting-disabled textarea {
      cursor: not-allowed;
    }

    .settings-card .row.setting-disabled input:not([type="checkbox"]),
    .settings-card .row.setting-disabled select,
    .settings-card .row.setting-disabled textarea {
      background-image: linear-gradient(135deg, rgba(160,160,160,0.18), rgba(160,160,160,0.08));
    }


    /* Het wacht-/placeholder-vraagteken bewust donkerder dan de gele oefentekens. */
    .big-symbol.placeholder-question {
      color: #173447 !important;
      text-shadow: none !important;
    }


    /* Mobile fix: scorekaartjes compact en naast elkaar, ook als externe CSS op mobiel naar blokweergave schakelt. */
    .score-grid.hidden,
    .input-panel.hidden,
    .history.hidden,
    .reverse-visual-panel.hidden {
      display: none !important;
    }

    .reverse-visual-panel {
      margin: 0.85rem 0 0.25rem;
      padding: 0.75rem 0.85rem;
      border: 1px solid rgba(148, 163, 184, 0.28);
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.045);
    }

    .reverse-visual-panel label {
      display: flex;
      align-items: flex-start;
      gap: 0.6rem;
      cursor: pointer;
      line-height: 1.25;
    }

    .reverse-visual-panel label + label {
      margin-top: 0.65rem;
      padding-top: 0.65rem;
      border-top: 1px solid rgba(148, 163, 184, 0.18);
    }

    .reverse-visual-panel input {
      flex: 0 0 auto;
      margin-top: 0.2rem;
    }

    .reverse-visual-title {
      display: block;
      font-weight: 800;
    }

    .reverse-visual-hint {
      display: block;
      margin-top: 0.16rem;
      font-size: 0.86rem;
      opacity: 0.78;
    }

    @media (max-width: 700px) {
      .main-card,
      .input-panel,
      .score-grid,
      .reverse-visual-panel,
      .controls {
        min-width: 0;
        box-sizing: border-box;
      }

      .input-panel {
        width: 100%;
      }

      .input-line {
        display: grid !important;
        grid-template-columns: 1fr;
        gap: 0.55rem;
        align-items: stretch;
      }

      .input-line input,
      .input-line button {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
      }

      .score-grid:not(.hidden) {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 0.55rem !important;
        margin: 0.85rem 0 1rem !important;
        align-items: stretch !important;
      }

      .score-card {
        display: flex !important;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-width: 0 !important;
        min-height: 72px;
        padding: 0.55rem 0.45rem !important;
        border: 1px solid rgba(148, 163, 184, 0.28);
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.045);
        text-align: center;
        box-sizing: border-box;
      }

      .score-card:last-child {
        grid-column: 1 / -1;
      }

      .score-label {
        line-height: 1.15;
        font-size: 0.82rem;
        opacity: 0.9;
        white-space: nowrap;
      }

      .score-value {
        line-height: 1.05;
        margin-top: 0.2rem;
        font-size: clamp(1.35rem, 8vw, 2.1rem);
        font-weight: 800;
      }

      .controls {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.65rem;
      }

      .controls button {
        width: 100%;
        min-width: 0;
        margin: 0 !important;
        box-sizing: border-box;
      }

      .controls button:nth-child(n+3) {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 380px) {
      .score-label {
        font-size: 0.76rem;
      }

      .score-card {
        min-height: 66px;
        padding-left: 0.35rem !important;
        padding-right: 0.35rem !important;
      }
    }


    /* Extra mobiele override: externe CSS mag score, knoppen of checkboxes niet terugzetten naar blokregels. */
    @media (max-width: 900px) {
      body .app .content .main-card #scoreGrid.score-grid:not(.hidden) {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 0.55rem !important;
        width: 100% !important;
        margin: 0.85rem 0 1rem 0 !important;
        padding: 0 !important;
        box-sizing: border-box !important;
      }

      body .app .content .main-card #scoreGrid.score-grid.hidden {
        display: none !important;
      }

      body .app .content .main-card #scoreGrid.score-grid > .score-card {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        min-width: 0 !important;
        min-height: 72px !important;
        width: auto !important;
        max-width: none !important;
        margin: 0 !important;
        padding: 0.55rem 0.45rem !important;
        border: 1px solid rgba(148, 163, 184, 0.36) !important;
        border-radius: 14px !important;
        background: rgba(255, 255, 255, 0.055) !important;
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.05) !important;
        text-align: center !important;
        box-sizing: border-box !important;
      }

      body .app .content .main-card #scoreGrid.score-grid > .score-card:last-child {
        grid-column: 1 / -1 !important;
      }

      body .app .content .main-card #scoreGrid .score-label,
      body .app .content .main-card #scoreGrid .score-value {
        display: block !important;
        text-align: center !important;
        width: 100% !important;
      }

      body .app .content .main-card .reverse-visual-panel {
        width: 100% !important;
        box-sizing: border-box !important;
        text-align: left !important;
      }

      body .app .content .main-card .reverse-visual-panel label {
        display: grid !important;
        grid-template-columns: auto minmax(0, 1fr) !important;
        align-items: start !important;
        justify-content: start !important;
        justify-items: start !important;
        gap: 0.55rem !important;
        width: 100% !important;
        margin-left: 0 !important;
        text-align: left !important;
      }

      body .app .content .main-card .reverse-visual-panel input[type="checkbox"] {
        justify-self: start !important;
        align-self: start !important;
        width: 1.15rem !important;
        min-width: 1.15rem !important;
        height: 1.15rem !important;
        margin: 0.12rem 0 0 0 !important;
        padding: 0 !important;
        position: static !important;
        transform: none !important;
      }

      body .app .content .main-card .reverse-visual-panel label > span {
        display: block !important;
        width: 100% !important;
        min-width: 0 !important;
        text-align: left !important;
      }

      body .app .content .settings-card #trainingMode,
      body .app .content .settings-card select {
        pointer-events: auto !important;
        touch-action: manipulation !important;
      }
    }