/* ==========================================================================
   One-Key-Communicator — CSS
   Modern, accessible, responsive design with desktop sidebar.
   Toolbar for action buttons, keyboard for letters only.
   Smart reader view with word-level display.
   ========================================================================== */

:root {
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-light: #e0e7ff;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --green: #22c55e;
    --red: #ef4444;
    --amber: #f59e0b;
    --text: #0f172a;
    --text-secondary: #64748b;
    --bg: #ffffff;
    --bg-soft: #f1f5f9;
    --bg-elevated: #ffffff;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

    /* Responsive key sizes — overridden by media queries */
    --key-min: 38px;
    --key-h: 48px;
    --key-font: 1.05rem;
    --key-wide-min: 60px;
    --keys-per-row: 9;
}

/* === Dark Mode === */
[data-theme="dark"] {
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --bg: #0f172a;
    --bg-soft: #1e293b;
    --bg-elevated: #1e293b;
    --border: #334155;
    --border-strong: #475569;
    --accent-light: #312e81;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

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

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg-soft);
    line-height: 1.5;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
}

.hidden { display: none !important; }

/* === Buttons === */
button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    font-size: inherit;
    background: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.15s ease;
    letter-spacing: -0.01em;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.97); }
.btn-outline { background: transparent; border: 2px solid var(--border-strong); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost { color: var(--text-secondary); padding: 8px 16px; }
.btn-ghost:hover { color: var(--text); }
.btn-block { width: 100%; }
.btn-small { padding: 8px 16px; font-size: 0.85rem; }

/* === Icon Button === */
.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all 0.15s;
    flex-shrink: 0;
}
.icon-btn:hover { background: var(--accent-light); color: var(--accent); }

/* === Views === */
.view {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100dvh;
}

/* ==========================================================================
   Loading View
   ========================================================================== */
.loading-center {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--text-secondary);
}
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================================================
   App Layout — Main + Sidebar
   ========================================================================== */
.app-layout {
    display: flex;
    flex: 1;
    height: 100dvh;
    overflow: hidden;
}
.writer-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

/* ==========================================================================
   Writer Header
   ========================================================================== */
.writer-header, .reader-header {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 6px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    min-height: 48px;
}
.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo {
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--accent);
    letter-spacing: -0.03em;
    white-space: nowrap;
}

/* Mode badge (in header) */
.mode-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: var(--accent-light);
    color: var(--accent);
}

/* Reader badge */
.reader-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-light);
}
.reader-icon { font-size: 0.85rem; }

/* Connection status pill */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 2px 8px 2px 6px;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-soft);
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-secondary);
    flex-shrink: 0;
}
.status-dot.connected { background: var(--green); }
.status-dot.disconnected { background: var(--red); }

/* ==========================================================================
   Text Display Area
   ========================================================================== */
.text-area {
    flex: 1;
    padding: 12px 14px 8px;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    line-height: 1.6;
    overflow-y: auto;
    min-height: 60px;
    max-height: 30dvh;
    background: var(--bg);
    word-wrap: break-word;
    border-bottom: 1px solid var(--border);
}
.text-area .cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
    margin-left: 1px;
}
@keyframes blink { 0%, 50% { opacity: 1; } 51%, 100% { opacity: 0; } }

/* ==========================================================================
   Current Word Preview (large, accessible)
   ========================================================================== */
.current-word-area {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    min-height: 48px;
    background: var(--accent-light);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
#currentWord {
    font-size: clamp(1.4rem, 5vw, 2.4rem);
    font-weight: 700;
    color: var(--accent-hover);
    letter-spacing: 0.02em;
    text-align: center;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==========================================================================
   Toolbar (action buttons — always visible, scannable via ☰)
   ========================================================================== */
.toolbar {
    display: flex;
    gap: 4px;
    padding: 6px 8px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    justify-content: center;
    flex-wrap: wrap;
    overflow: hidden;
}
.toolbar-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--bg-soft);
    border: 1.5px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.06s ease;
    user-select: none;
    -webkit-user-select: none;
    white-space: nowrap;
}
.toolbar-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.toolbar-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: scale(1.08);
    box-shadow: 0 0 0 3px var(--accent-glow);
    z-index: 2;
    position: relative;
}
.toolbar-icon { font-size: 1rem; }
.toolbar-label { font-size: 0.7rem; }

/* Back button (only visible during toolbar scan) */
.toolbar-btn.back-btn {
    background: var(--accent-light);
    color: var(--accent);
    border-color: var(--accent);
}

/* Mode button shows current mode */
.toolbar-btn.mode-toolbar-btn {
    background: var(--accent-light);
    color: var(--accent);
    border-color: transparent;
    font-weight: 700;
}

/* Pause button (amber) */
.toolbar-btn.pause-toolbar-btn {
    background: #fef3c7;
    color: #d97706;
    border-color: #f59e0b;
}
.toolbar-btn.pause-toolbar-btn.active {
    background: #f59e0b;
    color: white;
    border-color: #d97706;
}

/* ==========================================================================
   Share Hint
   ========================================================================== */
.share-hint {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px;
    background: var(--accent-light);
    color: var(--accent-hover);
    font-size: 0.78rem;
    font-weight: 500;
    flex-shrink: 0;
}
.share-hint-close { font-size: 1.1rem; opacity: 0.6; line-height: 1; color: inherit; }
.share-hint-close:hover { opacity: 1; }

/* ==========================================================================
   Keyboard
   ========================================================================== */
.keyboard {
    padding: 6px;
    background: var(--bg-soft);
    flex-shrink: 0;
}
.keyboard-row {
    display: flex;
    gap: 3px;
    justify-content: center;
    margin-bottom: 3px;
}

/* --- Key base --- */
.key {
    min-width: var(--key-min);
    height: var(--key-h);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: var(--key-font);
    font-weight: 600;
    background: var(--bg-elevated);
    border: 1.5px solid var(--border);
    color: var(--text);
    transition: all 0.06s ease;
    user-select: none;
    -webkit-user-select: none;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}
.key:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.key.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: scale(1.15);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow);
    z-index: 2;
    position: relative;
}
.key.wide { min-width: var(--key-wide-min); font-size: 0.85rem; }
.key.extra-wide { min-width: 90px; font-size: 0.85rem; }

/* --- Space key (prominent) --- */
.key.space-key {
    min-width: 80px;
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 700;
}
.key.space-key.active {
    background: var(--accent);
    color: white;
}

/* --- Action keys (backspace, ☰) --- */
.key.action-key {
    font-size: 0.85rem;
    background: var(--bg-soft);
    border-color: var(--border-strong);
    color: var(--text-secondary);
}
.key.action-key.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* --- Word suggestion keys (wild mode, green) --- */
.word-row {
    display: flex;
    gap: 3px;
    justify-content: center;
    margin-bottom: 3px;
}
.key.word-key {
    min-width: 56px;
    max-width: 110px;
    padding: 0 8px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #ecfdf5;
    color: #059669;
    border-color: #6ee7b7;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.key.word-key.active { background: #059669; color: white; border-color: #059669; }

/* ==========================================================================
   Quick Phrases
   ========================================================================== */
.quick-phrases {
    padding: 6px;
    background: var(--bg-soft);
    flex-shrink: 0;
    overflow-y: auto;
    max-height: 50dvh;
}
.quick-phrases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 4px;
}
.phrase-btn {
    padding: 10px 8px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    background: var(--bg-elevated);
    border: 1.5px solid var(--border);
    color: var(--text);
    transition: all 0.06s;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}
.phrase-btn:hover { border-color: var(--accent); color: var(--accent); }
.phrase-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ==========================================================================
   Pause Overlay
   ========================================================================== */
.pause-overlay {
    position: fixed;
    inset: 0;
    z-index: 500;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.pause-content { text-align: center; color: white; }
.pause-icon {
    font-size: 3.5rem;
    margin-bottom: 12px;
    opacity: 0.8;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.06); }
}
.pause-content p { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.pause-hint { font-size: 0.85rem !important; font-weight: 400 !important; opacity: 0.6; }

/* ==========================================================================
   Desktop Sidebar
   ========================================================================== */
.writer-sidebar {
    display: none;  /* hidden on mobile, shown via media query */
    width: 240px;
    flex-shrink: 0;
    background: var(--bg-elevated);
    border-left: 1px solid var(--border);
    padding: 16px;
    overflow-y: auto;
    flex-direction: column;
    gap: 20px;
}
.sidebar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.sidebar-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    align-self: flex-start;
}
.sidebar-url {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.68rem;
    word-break: break-all;
    color: var(--text-secondary);
    text-align: center;
    padding: 0 4px;
}
.sidebar-readers {
    display: flex;
    align-items: baseline;
    gap: 6px;
}
.sidebar-reader-count {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
}
.sidebar-reader-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
}
.sidebar-room-id {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 4px 10px;
    background: var(--bg-soft);
    border-radius: 6px;
}
.sidebar-pin {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--accent);
    padding: 6px 14px;
    background: var(--bg-soft);
    border-radius: 6px;
}
.pin-box {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 1.1rem;
    color: var(--text);
    padding: 8px 12px;
    background: var(--bg-soft);
    border-radius: 8px;
    margin-bottom: 1rem;
    text-align: center;
}
.pin-box strong {
    color: var(--text-secondary);
    font-weight: 600;
}
#sidebarQR {
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Reader list in sidebar */
.reader-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 3px;
    width: 100%;
    margin-top: 4px;
}
.reader-list-item {
    padding: 4px 10px;
    background: var(--bg-soft);
    border-radius: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}
.reader-list-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    flex-shrink: 0;
}

/* ==========================================================================
   Share Modal
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 20px;
}
.modal {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 24px 20px 18px;
    max-width: 360px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.modal p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 14px; }
.modal canvas { margin: 0 auto 14px; display: block; border-radius: 10px; border: 1px solid var(--border); }
.url-box {
    background: var(--bg-soft);
    padding: 8px 10px;
    border-radius: 8px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.72rem;
    word-break: break-all;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.modal-actions { display: flex; flex-direction: column; gap: 6px; }
.modal-actions .btn { width: 100%; }

/* ==========================================================================
   Settings Panel (slide-in from right)
   ========================================================================== */
.settings-panel { position: fixed; inset: 0; z-index: 300; }
.settings-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.3); backdrop-filter: blur(2px); }
.settings-content {
    position: absolute;
    right: 0; top: 0; bottom: 0;
    width: min(300px, 85vw);
    background: var(--bg-elevated);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: slideIn 0.2s ease;
}
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}
.settings-header h2 { font-size: 1rem; font-weight: 700; }
.settings-close { font-size: 1.4rem; width: 34px; height: 34px; color: var(--text-secondary); }
.settings-body {
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
}
.setting-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-top: 4px;
}
.setting-select, .setting-input {
    padding: 9px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--border);
    font-size: 0.9rem;
    background: var(--bg);
    color: var(--text);
    font-family: inherit;
    width: 100%;
}
.setting-select:focus, .setting-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.setting-range {
    width: 100%;
    accent-color: var(--accent);
}
.speed-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-secondary);
}
.setting-row { display: flex; gap: 8px; }

/* ==========================================================================
   Reader View — Smart text display
   ========================================================================== */
#read-view { padding: 0; }

.reader-display {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg);
}

/* Last word — very large, prominent */
.reader-last-word {
    font-size: clamp(2.5rem, 12vw, 7rem);
    font-weight: 800;
    text-align: center;
    padding: 16px 20px;
    color: var(--text);
    line-height: 1.1;
    flex-shrink: 0;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    word-break: break-word;
}

/* Recent words — medium-large, secondary color */
.reader-recent-words {
    font-size: clamp(1rem, 4vw, 1.8rem);
    font-weight: 500;
    text-align: center;
    padding: 6px 16px;
    color: var(--text-secondary);
    flex-shrink: 0;
    min-height: 32px;
    border-bottom: 1px solid var(--border);
}

/* Full text — normal scrollable area */
.reader-full-text {
    flex: 1;
    padding: 16px 20px;
    font-size: 1.2rem;
    line-height: 1.7;
    overflow-y: auto;
    word-wrap: break-word;
    color: var(--text);
    background: var(--bg-soft);
}
.reader-full-text.no-scroll {
    overflow-y: hidden;
}
.reader-empty-text {
    color: var(--text-secondary);
    font-style: italic;
    font-weight: 400;
}
.reader-full-text.empty {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* Reader bottom bar — name + controls */
.reader-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
.reader-name-input {
    flex: 1;
    padding: 7px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--border);
    font-size: 0.85rem;
    background: var(--bg);
    color: var(--text);
    font-family: inherit;
    max-width: 200px;
    min-width: 100px;
}
.reader-name-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.reader-view-controls {
    display: flex;
    gap: 4px;
    margin-left: auto;
}
.view-btn {
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.12s;
    user-select: none;
}
.view-btn:hover { border-color: var(--accent); color: var(--accent); }
.view-btn.active {
    background: var(--accent-light);
    color: var(--accent);
    border-color: var(--accent);
}

/* ==========================================================================
   Responsive — Small phones
   ========================================================================== */
@media (max-width: 400px) {
    :root {
        --key-min: 26px;
        --key-h: 38px;
        --key-font: 0.85rem;
        --key-wide-min: 42px;
        --keys-per-row: 7;
    }
    .writer-header { padding: 4px 8px; min-height: 40px; }
    .logo { font-size: 0.82rem; }
    .text-area { padding: 8px 10px; min-height: 48px; max-height: 22dvh; }
    .current-word-area { padding: 4px 8px; min-height: 36px; }
    #currentWord { font-size: clamp(1.1rem, 4vw, 1.6rem); }
    .keyboard { padding: 4px; }
    .keyboard-row { gap: 2px; margin-bottom: 2px; }
    .key.extra-wide { min-width: 64px; }
    .toolbar { padding: 4px 6px; gap: 3px; }
    .toolbar-btn { padding: 4px 8px; font-size: 0.72rem; }
    .toolbar-label { display: none; }
    .reader-last-word { padding: 10px; min-height: 60px; }
    .reader-recent-words { padding: 4px 10px; }
    .reader-full-text { padding: 10px; font-size: 1rem; }
    .reader-bar { padding: 6px 8px; }
}

/* === Normal phones === */
@media (min-width: 401px) and (max-width: 767px) {
    :root {
        --key-min: 32px;
        --key-h: 42px;
        --key-font: 0.95rem;
        --key-wide-min: 52px;
        --keys-per-row: 8;
    }
}

/* === Tablets === */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --key-min: 42px;
        --key-h: 50px;
        --key-font: 1.05rem;
        --key-wide-min: 68px;
        --keys-per-row: 10;
    }
    .text-area { max-height: 35dvh; }
    .current-word-area { min-height: 56px; }
    #currentWord { font-size: clamp(1.6rem, 4vw, 2.2rem); }
    .reader-last-word { font-size: clamp(3rem, 10vw, 5rem); }
    .reader-recent-words { font-size: clamp(1.4rem, 3vw, 2rem); }
    .reader-full-text { font-size: 1.4rem; }
}

/* === Desktop — show sidebar === */
@media (min-width: 1024px) {
    :root {
        --key-min: 48px;
        --key-h: 54px;
        --key-font: 1.1rem;
        --key-wide-min: 76px;
        --keys-per-row: 12;
    }
    .writer-sidebar {
        display: flex;
    }
    .text-area { max-height: 40dvh; font-size: 1.3rem; }
    .current-word-area { min-height: 60px; padding: 8px 16px; }
    #currentWord { font-size: 2.2rem; }
    .key.extra-wide { min-width: 130px; }
    .reader-last-word { font-size: clamp(4rem, 8vw, 7rem); }
    .reader-recent-words { font-size: 2rem; padding: 10px 24px; }
    .reader-full-text { font-size: 1.5rem; padding: 24px 32px; }
}

/* === Large desktop === */
@media (min-width: 1400px) {
    :root {
        --key-min: 54px;
        --key-h: 58px;
        --key-font: 1.15rem;
        --keys-per-row: 14;
    }
    .writer-sidebar { width: 280px; }
}
/* ==========================================================================
   Footer
   ========================================================================== */
.app-footer {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    font-size: 0.72rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.footer-github {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    transition: color 0.15s;
}
.footer-github:hover {
    color: var(--accent);
}

/* ==========================================================================
   Help Modal
   ========================================================================== */
.help-modal {
    max-width: 420px;
    text-align: left;
}
.help-modal h2 {
    text-align: center;
    margin-bottom: 16px;
}
.help-content {
    margin-bottom: 20px;
}
.help-content p {
    margin-bottom: 12px;
    color: var(--text);
    font-size: 0.9rem;
}
.help-content ol {
    margin: 12px 0 16px 20px;
    color: var(--text);
    font-size: 0.88rem;
}
.help-content ol li {
    margin-bottom: 8px;
    line-height: 1.5;
}
.help-tip {
    font-style: italic;
    color: var(--text-secondary) !important;
    font-size: 0.82rem !important;
    padding: 10px;
    background: var(--bg-soft);
    border-radius: var(--radius);
    margin-top: 12px;
}

/* ==========================================================================
   Toggle Switches
   ========================================================================== */
.setting-toggle {
    display: flex;
    align-items: center;
}
.toggle-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.toggle-label {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    background: var(--border-strong);
    border-radius: 13px;
    cursor: pointer;
    transition: background 0.2s;
}
.toggle-label::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: var(--shadow-sm);
}
.toggle-input:checked + .toggle-label {
    background: var(--accent);
}
.toggle-input:checked + .toggle-label::after {
    transform: translateX(22px);
}
.toggle-input:focus + .toggle-label {
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ==========================================================================
   Number Keys
   ========================================================================== */
.key.number-key {
    background: #fef3c7;
    color: #d97706;
    border-color: #f59e0b;
    font-weight: 700;
}
.key.number-key.active {
    background: #f59e0b;
    color: white;
    border-color: #d97706;
}
[data-theme="dark"] .key.number-key {
    background: #451a03;
    color: #fbbf24;
    border-color: #b45309;
}
[data-theme="dark"] .key.number-key.active {
    background: #f59e0b;
    color: #451a03;
}

/* ==========================================================================
   Auto-sizing Keyboard Keys
   ========================================================================== */
.keyboard {
    display: flex;
    flex-direction: column;
    padding: 6px;
    background: var(--bg-soft);
    flex-shrink: 0;
    flex-grow: 1;
    max-height: 55dvh;
}
.keyboard-row {
    display: flex;
    gap: 3px;
    justify-content: center;
    margin-bottom: 3px;
    flex: 1;
    min-height: 0;
}
.key {
    min-width: var(--key-min);
    height: auto;
    min-height: var(--key-h);
    flex: 1 1 var(--key-min);
    max-width: calc(var(--key-min) * 2);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: var(--key-font);
    font-weight: 600;
    background: var(--bg-elevated);
    border: 1.5px solid var(--border);
    color: var(--text);
    transition: all 0.06s ease;
    user-select: none;
    -webkit-user-select: none;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    padding: 4px 8px;
}

/* Dark mode adjustments */
[data-theme="dark"] .key.word-key {
    background: #064e3b;
    color: #6ee7b7;
    border-color: #059669;
}
[data-theme="dark"] .key.word-key.active {
    background: #059669;
    color: white;
}

/* =========================================================================
   SCANNABLE MODAL/SETTINGS BUTTONS
   ========================================================================= */

.settings-scan-area,
.modal-scan-area {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px;
    background: var(--bg-subtle);
    border-top: 1px solid var(--border);
    margin-top: 16px;
}

.scan-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    min-height: 70px;
    flex: 1 1 80px;
    max-width: 120px;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 12px 8px;
    cursor: pointer;
    transition: all 0.1s ease;
    user-select: none;
}

.scan-btn:hover {
    border-color: var(--primary);
    background: var(--bg-elevated);
}

.scan-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.scan-btn-back {
    background: var(--bg-subtle);
}

.scan-btn-back.active {
    background: var(--warning);
    border-color: var(--warning);
}

.scan-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.scan-label {
    font-size: 12px;
    font-weight: 600;
    text-align: center;
}

/* Toolbar scan buttons (when in toolbar mode) */
.toolbar-scan-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 60px;
}

.toolbar-scan-icon {
    font-size: 20px;
}

.toolbar-scan-label {
    font-size: 11px;
    font-weight: 500;
}

/* Dark mode for scan buttons */
[data-theme="dark"] .scan-btn {
    background: var(--bg-elevated);
    border-color: var(--border);
    color: var(--text);
}

[data-theme="dark"] .scan-btn.active {
    background: var(--primary);
    color: white;
}

[data-theme="dark"] .scan-btn-back.active {
    background: var(--warning);
}