:root {
            --bg-body: #f4f1ea;
            --bg-panel: #ffffff;
            --primary: #2c3e50;
            --accent: #c0392b;
            --highlight: #f39c12;
            --text-main: #2c3e50;
            --text-muted: #7f8c8d;
            --border-radius: 6px;
            --shadow-soft: 0 4px 6px rgba(0,0,0,0.05);
            --font-ui: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-editor: 'Frank Ruhl Libre', 'David', serif;
        }

        * { box-sizing: border-box; touch-action: manipulation; }

        body {
            margin: 0; padding: 20px;
            font-family: var(--font-ui);
            background-color: var(--bg-body);
            background-image: radial-gradient(#e0ded8 1px, transparent 1px);
            background-size: 20px 20px;
            color: var(--text-main);
            display: flex; flex-direction: column; align-items: center;
            min-height: 100vh;
        }

        #bh  {
            max-width: 800px;
            width: 100%;
            font-weight: bold;
            font-family: monospace;
            text-align: right;
        }
        .app-container {
            width: 100%; max-width: 800px;
            background: var(--bg-panel);
            border-radius: var(--border-radius);
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            border-top: 5px solid var(--primary);
            overflow: hidden;
            display: flex; flex-direction: column; gap: 1rem;
            padding-bottom: .5rem;
        }

        header {
            padding: 1rem 1.5rem;
            border-bottom: 1px solid #eee;
            background: #fafafa;
            text-align: center;
        }

        h1 { margin: 0; font-size: 1.5rem; color: var(--primary);}
        h1 span { color: var(--accent); }
        h2 { margin: 4px 0 0 0; font-size: .75em; color: #838383; }

        .toolbar-section {
            padding: 0 1.5rem;
            display: flex; flex-direction: column; gap: 10px;
        }
        .toolbar-label {
            font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px;
            color: var(--text-muted); font-weight: 600;
            align-items: center;
        }

        .button-group { display: flex; flex-wrap: wrap; gap: 8px;}

        /* Buttons */
        button {
            border: 1px solid #dcdcdc; background: #fff;
            color: var(--primary); border-radius: 4px;
            padding: 8px 12px; cursor: pointer;
            font-family: var(--font-ui); font-size: 0.9rem; font-weight: 500;
            transition: all 0.1s ease;
            min-height: 44px; display: flex; align-items: center; justify-content: center;
            user-select: none; -webkit-user-select: none;
        }
        button:hover:not(:disabled) { background: #f0f0f0; transform: translateY(-1px); }
        button:active:not(:disabled) { transform: translateY(0); background: #e2e6ea; }
        button:disabled { opacity: 0.5; cursor: not-allowed; background: #f9f9f9; }

        .btn-action.danger { color: #c0392b; border-color: #fadbd8; }
        .btn-action.danger:hover { background: #fdedec; }
        .btn-nav { background: var(--primary); color: white; min-width: 60px; }
        .btn-nav:hover:not(:disabled) { background: #34495e; color: white; }
        .btn-nav.stop { background: var(--accent); }

        /* Nekudot Grid */
        .nekudot-grid {
            display: grid; grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
            gap: 6px; margin-top: 5px; padding: 10px;
            background: #f8f9fa; border-radius: var(--border-radius); border: 1px solid #eee;
        }
        .btn-nekuda {
            font-family: var(--font-editor); font-size: 1.6rem;
            line-height: 1; padding: 0; height: 48px;
        }
        .btn-nekuda.clear-nekuda {
            font-size: 0.9rem; color: #c0392b; grid-column: span 2;
        }

        /* Input */
        .input-wrapper { padding: 0 1.5rem; position: relative; }
        textarea {
            width: 100%; min-height: 180px; padding: 15px;
            font-family: var(--font-editor); font-size: 28px; line-height: 1.5;
            border: 2px solid #ddd; border-radius: var(--border-radius);
            resize: vertical; outline: none; background: #fff; color: #000;
        }
        textarea:focus { border-color: var(--primary); }
        textarea::selection { background: var(--highlight); color: white; }
        textarea::placeholder {
          text-align:center;
        }

        /* Keyboard */
        .keyboard-section {
            padding: 1rem 1.5rem; background: #f4f6f7;
            border-top: 1px solid #e0e0e0; margin-top: 1rem;
        }
        .kb-row { display: flex; justify-content: center; gap: 6px; margin-bottom: 6px; }
        .btn-key {
            font-family: var(--font-ui); font-size: 1.1rem;
            min-width: 40px; flex: 1; max-width: 60px;
            box-shadow: 0 2px 0 #bdc3c7; border: 1px solid #bdc3c7;
        }
        .btn-key:active { box-shadow: none; transform: translateY(2px); }
        .btn-key.space { flex: 5; max-width: 300px; }
        .btn-key.backspace { flex: 1.5; background: #e0e0e0; font-size: 0.9rem; }

        /* Help */
        .help-section {
            padding: 0 1.5rem; color: var(--text-muted); font-size: 0.85rem;
            border-top: 1px solid #eee; margin-top: 10px; padding-top: 15px;
        }
        .help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; text-align: left; }

        /* What are Nikkudot section */
        #what-are-nikkudot {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 2px solid #eee;
        }
        #what-are-nikkudot h3 {
            color: var(--primary);
            margin-bottom: 10px;
        }
        #what-are-nikkudot p {
            line-height: 1.6;
            margin-bottom: 10px;
            text-align: justify;
            direction: ltr;
        }
        #what-are-nikkudot p:last-of-type {
            margin-bottom: 15px;
        }
        #what-are-nikkudot a {
            color: var(--accent);
        }

        /* Helper for english text */
        .ltr {
            direction: ltr !important;
            align-items: center;
            text-align: center;
        }

        .rtl {
            direction: rtl !important;
            align-items: right;
            text-align: right;
        }

        select {
            border: 1px solid #dcdcdc; background: #fff;
            color: var(--primary); border-radius: 4px;
            padding: 8px 12px; cursor: pointer;
            font-family: var(--font-ui); font-size: 0.9rem; font-weight: 500;
            transition: all 0.1s ease;
            min-height: 44px; display: flex; align-items: center; justify-content: center;
            user-select: none; -webkit-user-select: none;
        }

        .driver-popover-description img {
            max-width: 100%;
        }

        @media (max-width: 600px) {
            body { padding: 0; background: #fff; }
            .app-container { border-radius: 0; box-shadow: none; border-top: none; }
            textarea { font-size: 22px; }
            .kb-row { gap: 3px; }
            .btn-key { min-width: 30px; padding: 8px 2px; }
            .help-grid { grid-template-columns: 1fr; }
        }