/* playground-features.css - Modern styles for Sample Codes, Phone Preview, Fullscreen, Permalink/QR, TTS & Fill-in-the-Blanks Quiz */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=Fira+Code:wght@400;500&display=swap');

:root {
    --pf-font: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --pf-code-font: 'Fira Code', monospace;
    --pf-bg-dark: #12141c;
    --pf-card-bg: rgba(26, 30, 44, 0.95);
    --pf-card-border: rgba(255, 255, 255, 0.1);
    --pf-accent-primary: #6366f1;
    --pf-accent-phone: #06b6d4;
    --pf-accent-share: #10b981;
    --pf-accent-tts: #f59e0b;
    --pf-accent-quiz: #ec4899;
    --pf-text-primary: #f8fafc;
    --pf-text-secondary: #94a3b8;
    --pf-success: #10b981;
    --pf-error: #ef4444;
}

/* =========================================================
   1. FEATURE BUTTONS & TOOLBAR ENHANCEMENTS
   ========================================================= */
.pf-feature-btn-group {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.28);
    padding: 4px 8px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.pf-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--pf-font);
    font-size: 13px !important;
    font-weight: 500;
    padding: 6px 12px !important;
    border-radius: 6px !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    color: #ffffff !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.pf-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    filter: brightness(1.1);
}

.pf-btn:active {
    transform: translateY(0);
}

.pf-btn-samples {
    background: linear-gradient(135deg, #6366f1, #4f46e5) !important;
}

.pf-btn-phone {
    background: linear-gradient(135deg, #0ea5e9, #0284c7) !important;
}

.pf-btn-phone.active {
    background: linear-gradient(135deg, #06b6d4, #0891b2) !important;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.5) !important;
    border-color: #67e8f9 !important;
}

.pf-btn-fullscreen {
    background: linear-gradient(135deg, #3b82f6, #2563eb) !important;
}

.pf-btn-share {
    background: linear-gradient(135deg, #10b981, #059669) !important;
}



@keyframes pf-pulse-btn {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.pf-btn-quiz {
    background: linear-gradient(135deg, #ec4899, #db2777) !important;
}

/* Sample selector dropdown */
.pf-samples-dropdown {
    font-family: var(--pf-font);
    font-size: 13px;
    padding: 6px 10px;
    background: #1e2230;
    color: #f1f5f9;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    outline: none;
    cursor: pointer;
    max-width: 170px;
}

.pf-samples-dropdown:focus {
    border-color: var(--pf-accent-primary);
}

/* =========================================================
   2. PHONE PREVIEW CONTAINER & SMARTPHONE FRAME
   ========================================================= */
.preview-container {
    position: relative;
    overflow: hidden;
    background: #0f1117;
    transition: background 0.3s ease;
}

.preview-container.phone-mode-active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 12px 16px 24px;
    overflow-y: auto;
    background: radial-gradient(circle at 50% 20%, #1a1e2d 0%, #0d0f17 100%);
}

/* Phone control strip above device */
.pf-phone-toolbar {
    display: none;
    align-items: center;
    gap: 12px;
    background: rgba(30, 35, 50, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 30px;
    padding: 6px 14px;
    margin-bottom: 12px;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.preview-container.phone-mode-active .pf-phone-toolbar {
    display: flex;
}

.pf-phone-toolbar label {
    font-family: var(--pf-font);
    font-size: 12px;
    color: var(--pf-text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.pf-phone-select {
    background: #131722;
    color: #f8fafc;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    font-family: var(--pf-font);
    font-size: 12px;
    padding: 4px 8px;
    outline: none;
    cursor: pointer;
}

.pf-phone-tool-btn {
    background: rgba(255, 255, 255, 0.08);
    color: #f1f5f9;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    padding: 4px 10px;
    font-family: var(--pf-font);
    font-size: 12px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.pf-phone-tool-btn:hover {
    background: rgba(255, 255, 255, 0.16);
}

/* Smartphone Frame Shell */
.pf-phone-shell {
    display: none;
    position: relative;
    background: #000000;
    border-radius: 46px;
    padding: 12px;
    box-shadow: 
        0 0 0 2px #3e4454,
        0 0 0 8px #1c202a,
        0 0 0 10px #2a3040,
        0 25px 60px rgba(0, 0, 0, 0.7);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-sizing: border-box;
    flex-shrink: 0;
}

.preview-container.phone-mode-active .pf-phone-shell {
    display: flex;
    flex-direction: column;
}

/* Dimensions for iPhone 15 Pro default */
.pf-phone-shell.device-iphone15 {
    width: 393px;
    height: 780px;
}

.pf-phone-shell.device-pixel8 {
    width: 412px;
    height: 800px;
    border-radius: 38px;
}

.pf-phone-shell.device-compact {
    width: 360px;
    height: 640px;
    border-radius: 34px;
}

.pf-phone-shell.device-ipad {
    width: 580px;
    height: 780px;
    border-radius: 28px;
}

/* Landscape Mode */
.pf-phone-shell.landscape {
    transform: rotate(0deg);
}

.pf-phone-shell.landscape.device-iphone15 {
    width: 780px;
    height: 393px;
}

.pf-phone-shell.landscape.device-pixel8 {
    width: 800px;
    height: 412px;
}

.pf-phone-shell.landscape.device-compact {
    width: 640px;
    height: 360px;
}

.pf-phone-shell.landscape.device-ipad {
    width: 780px;
    height: 580px;
}

/* Dynamic Island & Notch */
.pf-phone-island {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background: #000000;
    border-radius: 20px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    box-shadow: 0 0 2px rgba(255, 255, 255, 0.2);
    pointer-events: none;
}

.pf-phone-island::before {
    content: '';
    width: 11px;
    height: 11px;
    background: #111b2d;
    border-radius: 50%;
    box-shadow: inset 0 0 2px #38bdf8;
}

/* Status Bar */
.pf-phone-status-bar {
    position: absolute;
    top: 16px;
    left: 30px;
    right: 30px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 11px;
    font-weight: 600;
    color: #ffffff;
    z-index: 90;
    pointer-events: none;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.pf-phone-status-icons {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
}

/* Phone Screen Container for iframe */
.pf-phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 36px;
    overflow: hidden;
    background: #ffffff;
    position: relative;
}

.preview-container.phone-mode-active #preview {
    width: 100% !important;
    height: 100% !important;
    border: none;
    border-radius: 36px;
}

/* Home Indicator Pill at bottom */
.pf-phone-home-indicator {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: 130px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    z-index: 95;
    pointer-events: none;
}

/* Default desktop preview mode vs Phone mode */
.preview-container:not(.phone-mode-active) .pf-phone-toolbar {
    display: none !important;
}

.preview-container:not(.phone-mode-active) .pf-phone-shell {
    display: contents !important;
}

.preview-container:not(.phone-mode-active) .pf-phone-island,
.preview-container:not(.phone-mode-active) .pf-phone-status-bar,
.preview-container:not(.phone-mode-active) .pf-phone-home-indicator {
    display: none !important;
}

.preview-container:not(.phone-mode-active) .pf-phone-screen {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
    border-radius: 0 !important;
    overflow: visible !important;
}

.preview-container:not(.phone-mode-active) #preview {
    width: 100% !important;
    height: 100% !important;
    border: none !important;
    border-radius: 0 !important;
    display: block !important;
}


/* =========================================================
   3. FULLSCREEN PREVIEW OVERLAY
   ========================================================= */
.pf-fullscreen-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    background: #0f172a;
    z-index: 999999;
    display: none;
    flex-direction: column;
}

.pf-fullscreen-overlay.active {
    display: flex;
}

.pf-fullscreen-header {
    min-height: 44px;
    background: #181b26;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 14px;
    font-family: var(--pf-font);
    color: #ffffff;
    gap: 8px;
    flex-wrap: wrap;
}

.pf-fullscreen-header-title {
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pf-live-badge {
    background: #10b981;
    color: #022c22;
    font-size: 10px;
    font-weight: 800;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.pf-fullscreen-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pf-fullscreen-action-btn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    cursor: pointer;
    font-family: var(--pf-font);
    transition: all 0.2s;
}

.pf-fullscreen-action-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.pf-edit-code-btn {
    background: #2563eb;
    border-color: #60a5fa;
    font-weight: 600;
}

.pf-edit-code-btn:hover {
    background: #1d4ed8;
}

.pf-fullscreen-close-btn {
    background: #ef4444;
    color: white;
    border: none;
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 12px;
    cursor: pointer;
    font-family: var(--pf-font);
    font-weight: 500;
}

.pf-fullscreen-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: #ffffff;
    width: 100%;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

.pf-fullscreen-body iframe {
    width: 100%;
    height: 100%;
    flex: 1;
    border: none;
    background: #ffffff;
    display: block;
}

/* =========================================================
   4. MODALS (SHARED DIALOG BASE)
   ========================================================= */
.pf-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(6, 8, 15, 0.75);
    backdrop-filter: blur(6px);
    z-index: 99999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
    padding: 16px;
    box-sizing: border-box;
}

.pf-modal-backdrop.open {
    display: flex;
    opacity: 1;
}

.pf-modal-card {
    background: var(--pf-card-bg);
    border: 1px solid var(--pf-card-border);
    border-radius: 16px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 1px 1px rgba(255, 255, 255, 0.1);
    color: var(--pf-text-primary);
    font-family: var(--pf-font);
    max-width: 680px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: pf-modal-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pf-modal-pop {
    0% { transform: scale(0.92); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.pf-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.02);
}

.pf-modal-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pf-modal-close-btn {
    background: rgba(255, 255, 255, 0.08);
    color: #94a3b8;
    border: none;
    font-size: 18px;
    line-height: 1;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.pf-modal-close-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.pf-modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.pf-modal-footer {
    padding: 14px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.2);
}

/* =========================================================
   5. PERMALINK & QR CODE SHARE MODAL
   ========================================================= */
.pf-share-card {
    max-height: 94vh;
}

.pf-share-card .pf-modal-body {
    padding: 12px 18px;
}

.pf-share-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
}

.pf-share-host-picker {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.25);
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.pf-host-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.pf-host-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #cbd5e1;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-family: var(--pf-font);
    cursor: pointer;
    transition: all 0.2s;
}

.pf-host-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
}

.pf-host-btn.active {
    background: var(--pf-accent-share);
    border-color: #34d399;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.45);
}

.pf-wifi-ip-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    background: rgba(255, 255, 255, 0.04);
    padding: 5px 10px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.pf-wifi-ip-input {
    background: #0b0f19;
    border: 1px solid rgba(56, 189, 248, 0.3);
    color: #38bdf8;
    font-family: var(--pf-code-font);
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 5px;
    width: 125px;
    text-align: center;
    font-weight: 600;
}

.pf-wifi-ip-input:focus {
    border-color: #38bdf8;
    outline: none;
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.3);
}

.pf-wifi-ip-save-btn {
    background: #2563eb;
    color: #ffffff;
    border: none;
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--pf-font);
    transition: all 0.2s;
}

.pf-wifi-ip-save-btn:hover {
    background: #1d4ed8;
}

.pf-cloud-url-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    background: rgba(16, 185, 129, 0.08);
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid rgba(16, 185, 129, 0.25);
    max-width: 480px;
    width: 100%;
    box-sizing: border-box;
}

.pf-cloud-url-input {
    background: #0b0f19;
    border: 1px solid rgba(52, 211, 153, 0.4);
    color: #34d399;
    font-family: var(--pf-code-font);
    font-size: 11px;
    padding: 5px 8px;
    border-radius: 5px;
    flex: 1;
    min-width: 0;
}

.pf-cloud-url-input:focus {
    border-color: #34d399;
    outline: none;
    box-shadow: 0 0 8px rgba(52, 211, 153, 0.3);
}

.pf-cloud-url-save-btn {
    background: #059669;
    color: #ffffff;
    border: none;
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--pf-font);
    white-space: nowrap;
    transition: all 0.2s;
}

.pf-cloud-url-save-btn:hover {
    background: #047857;
}

.pf-share-view-picker {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.pf-view-options {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.pf-view-btn {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #cbd5e1;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
    font-family: var(--pf-font);
    transition: all 0.2s;
}

.pf-view-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

.pf-view-btn.active {
    background: #3b82f6;
    border-color: #60a5fa;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
}

.pf-qr-box {
    background: #ffffff;
    padding: 18px;
    border-radius: 14px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 290px;
    min-height: 290px;
    transition: all 0.25s ease;
    box-sizing: border-box;
}

.pf-qr-box.zoomed {
    transform: scale(1.35);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.85);
    z-index: 25;
}

.pf-qr-box img, .pf-qr-box canvas {
    display: block;
    max-width: 100%;
    image-rendering: auto;
}

.pf-qr-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 1px;
}

.pf-qr-action-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: #cbd5e1;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--pf-font);
    transition: all 0.2s;
}

.pf-qr-action-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.3);
}

.pf-share-hints-box {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 11px;
    color: #cbd5e1;
    max-width: 480px;
    width: 100%;
    box-sizing: border-box;
    text-align: left;
    line-height: 1.5;
}

.pf-share-hints-box strong {
    color: #ffffff;
}

.pf-share-hints-box code {
    background: rgba(255, 255, 255, 0.12);
    padding: 2px 5px;
    border-radius: 4px;
    color: #38bdf8;
    font-family: var(--pf-code-font);
}

.pf-permalink-input-wrap {
    width: 100%;
    display: flex;
    gap: 8px;
    margin-top: 6px;
}

.pf-permalink-input {
    flex: 1;
    background: #0f131f;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #cbd5e1;
    font-family: var(--pf-code-font);
    font-size: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    outline: none;
}

.pf-copy-btn {
    background: var(--pf-accent-share);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 0 16px;
    font-family: var(--pf-font);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.pf-copy-btn:hover {
    background: #059669;
}

.pf-test-btn {
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 8px;
    padding: 0 14px;
    font-family: var(--pf-font);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
    white-space: nowrap;
}

.pf-test-btn:hover {
    background: rgba(56, 189, 248, 0.25);
    color: #ffffff;
    filter: brightness(1.1);
}

/* =========================================================
   6. SAMPLE CODES MODAL & BROWSER
   ========================================================= */
.pf-samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
    margin-top: 12px;
}

.pf-sample-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 14px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.pf-sample-card:hover {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.pf-sample-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.pf-sample-card-title {
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
    margin: 0;
}

.pf-sample-badge {
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
    font-weight: 500;
}

.pf-sample-desc {
    font-size: 12px;
    color: var(--pf-text-secondary);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.pf-sample-load-btn {
    align-self: flex-start;
    background: var(--pf-accent-primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--pf-font);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* =========================================================
   8. POPUP FILL IN THE BLANKS (MULTIPLE BLANKS IN 1 QUESTION)
   ========================================================= */
.pf-quiz-card {
    max-width: 650px;
}

.pf-quiz-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.pf-quiz-badge {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pf-badge-html { background: rgba(239, 68, 68, 0.18); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.3); }
.pf-badge-css { background: rgba(59, 130, 246, 0.18); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.pf-badge-js { background: rgba(245, 158, 11, 0.18); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }

.pf-quiz-title {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 14px 0;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Question Sentence Box with Inline Blanks */
.pf-quiz-sentence-box {
    background: rgba(15, 19, 32, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 18px;
    font-size: 15px;
    line-height: 2.2;
    color: #e2e8f0;
    margin-bottom: 16px;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Inline Blank Dropdown / Input */
.pf-quiz-blank {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    margin: 0 4px;
}

.pf-quiz-blank input {
    font-family: var(--pf-code-font);
    font-size: 13px;
    font-weight: 600;
    background: #1e2538;
    color: #38bdf8;
    border: 2px dashed #0284c7;
    border-radius: 8px;
    padding: 4px 10px;
    outline: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 110px;
    appearance: none;
    -webkit-appearance: none;
    text-align: center;
}

.pf-quiz-blank input:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
    background: #252e46;
}

/* Blank Success State */
.pf-quiz-blank.is-correct input {
    background: rgba(16, 185, 129, 0.18) !important;
    border: 2px solid #10b981 !important;
    color: #34d399 !important;
}

/* Blank Incorrect State */
.pf-quiz-blank.is-incorrect input {
    background: rgba(239, 68, 68, 0.18) !important;
    border: 2px solid #ef4444 !important;
    color: #f87171 !important;
}

.pf-quiz-blank-hint {
    display: none;
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    background: #ef4444;
    color: white;
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 10;
    font-family: var(--pf-code-font);
}

.pf-quiz-blank.is-incorrect .pf-quiz-blank-hint {
    display: block;
}

/* Word Bank Chips */
.pf-word-bank-wrap {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.pf-word-bank-label {
    font-size: 11px;
    color: var(--pf-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pf-word-chip {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
    padding: 3px 8px;
    border-radius: 6px;
    font-family: var(--pf-code-font);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.pf-word-chip:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: #818cf8;
    color: #ffffff;
    transform: translateY(-1px);
}

/* Feedback Box */
.pf-quiz-feedback {
    display: none;
    margin-top: 14px;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 13px;
    line-height: 1.5;
}

.pf-quiz-feedback.show {
    display: block;
    animation: pf-fade-in 0.3s ease;
}

@keyframes pf-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.pf-quiz-feedback.success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #a7f3d0;
}

.pf-quiz-feedback.partial {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fde68a;
}

.pf-quiz-code-preview {
    margin-top: 10px;
    background: #0b0e17;
    border-radius: 8px;
    padding: 12px;
    font-family: var(--pf-code-font);
    font-size: 12px;
    color: #cbd5e1;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Pagination & Quiz Footers */
.pf-quiz-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pf-quiz-dots {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pf-quiz-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all 0.2s;
}

.pf-quiz-dot.active {
    background: var(--pf-accent-quiz);
    transform: scale(1.3);
}

.pf-quiz-dot.completed {
    background: var(--pf-success);
}


.pf-quiz-filter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; margin: 12px 0; }
.pf-quiz-filter-grid label { display: flex; flex-direction: column; gap: 5px; }
.pf-quiz-filter-grid select { width: 100%; min-width: 0; padding: 7px; background: #1e2538; color: white; border: 1px solid #475569; border-radius: 6px; }
.pf-quiz-filters { margin-bottom: 16px; color: #cbd5e1; }
.pf-quiz-filters summary { cursor: pointer; }
#pf-quiz-prerequisites { display: flex; flex-wrap: wrap; gap: 12px; margin: 12px 0; }
#pf-quiz-prerequisites label { display: flex; gap: 6px; align-items: center; }
#pf-quiz-description { color: #cbd5e1; line-height: 1.5; }
.pf-quiz-sentence-box { overflow-wrap: anywhere; }
.pf-quiz-blank input { max-width: 65vw; cursor: text; }
.pf-quiz-blank input:disabled { opacity: .8; }
#pf-quiz-modal button:disabled { opacity: .45; cursor: default; }
#pf-quiz-modal .pf-modal-footer, #pf-quiz-modal .pf-modal-footer > div { flex-wrap: wrap; gap: 8px; }

#pf-quiz-modal .pf-quiz-meta { flex-wrap: wrap; }
#pf-quiz-modal .pf-quiz-badge { background: rgba(255,255,255,.08); color: #cbd5e1; }

#pf-quiz-word-bank-wrap[hidden] { display: none; }

#pf-quiz-modal .pf-quiz-nav { width: 100%; flex-wrap: nowrap; }
#pf-quiz-modal .pf-quiz-dots { flex: 1; min-width: 0; overflow-x: auto; padding: 6px 2px; }
#pf-quiz-modal .pf-quiz-dot { flex-shrink: 0; }

/* Keep the live output beside the code instead of below a full-height editor. */
#main-container { min-height: 420px; height: auto; min-width: 0; }
#editor-container {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(220px, 0.95fr);
    grid-template-rows: auto minmax(0, 1fr);
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}
#current-file-name { grid-column: 1; grid-row: 1; }
#editor-container > .CodeMirror { grid-column: 1; grid-row: 2; min-width: 0; min-height: 0; }
#editor-container > .CodeMirror { width: 100%; height: 100% !important; }
#preview-container {
    grid-column: 2;
    grid-row: 1 / -1;
    min-width: 0;
    min-height: 0;
    box-sizing: border-box;
    border-left: 1px solid #34394b;
}
#preview-container.phone-mode-active { overflow: hidden; }
#preview-container .pf-phone-toolbar {
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    max-width: 100%;
    box-sizing: border-box;
    border-radius: 12px;
}
#preview-container .pf-phone-toolbar label { flex-wrap: wrap; justify-content: center; }
#preview-container .pf-phone-shell { transition: none; }
@media (max-width: 900px) {
    body { height: auto; min-height: 100vh; }
    #main-container { overflow: visible; flex-direction: column; flex: none; }
    #file-explorer { width: auto; min-width: 0; max-width: none; max-height: 160px; resize: vertical; }
    #editor-container {
        flex: none;
        height: auto;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto 45vh 55vh;
    }
    #preview-container { grid-column: 1; grid-row: 3; height: auto; border-left: 0; border-top: 1px solid #34394b; }
}

.pf-output-voice { display: inline-flex; align-items: center; gap: 6px; color: #e2e8f0; font-size: 13px; cursor: pointer; white-space: nowrap; }
.pf-output-voice input { margin: 0; accent-color: #6366f1; }

/* Toolbar groups: labels convey purpose; color and separators aid scanning. */
.toolbar {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 8px;
    padding: 10px;
    background: #151b29;
    border-bottom: 1px solid #394255;
    max-height: 38vh;
    overflow-y: auto;
    box-sizing: border-box;
}
.toolbar-group {
    --group-color: #cbd5e1;
    --group-bg: #293344;
    display: flex;
    flex-direction: column;
    gap: 7px;
    min-width: 0;
    padding: 8px 10px;
    border-inline-start: 1px solid #475569;
    border-top: 2px solid var(--group-color);
    border-radius: 5px;
    background: #1c2433;
}
.toolbar-files { --group-color: #93c5fd; --group-bg: #213e64; }
.toolbar-edit { --group-color: #cbd5e1; --group-bg: #334155; }
.toolbar-code { --group-color: #c4b5fd; --group-bg: #403564; }
.toolbar-preview { --group-color: #67e8f9; --group-bg: #164552; }
.toolbar-learn { --group-color: #fde68a; --group-bg: #58451e; }
.toolbar-share { --group-color: #6ee7b7; --group-bg: #1b493e; }
.toolbar-record { --group-color: #fda4af; --group-bg: #5a2c3d; }
.toolbar-group-label {
    color: var(--group-color);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}
.toolbar-group-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 5px; }
.toolbar .toolbar-group button {
    min-height: 32px;
    padding: 6px 9px !important;
    font-size: 12px !important;
    font-family: inherit;
    line-height: 1.3;
    background: var(--group-bg) !important;
    border: 1px solid transparent !important;
    border-radius: 5px !important;
    color: #f8fafc;
    box-shadow: none !important;
    transform: none;
}
.toolbar .toolbar-group button:hover { border-color: var(--group-color) !important; filter: brightness(1.2); }
.toolbar .toolbar-group button:focus-visible,
.toolbar .toolbar-group select:focus-visible,
.toolbar .toolbar-group input:focus-visible { outline: 2px solid #f8fafc; outline-offset: 2px; }
.toolbar .toolbar-group button.active { border-color: var(--group-color) !important; }
.toolbar .toolbar-group .toolbar-danger { color: #fecaca; border-color: #99515e !important; }
.toolbar .pf-samples-dropdown { max-width: 215px; min-width: 0; min-height: 32px; font-family: inherit; }
.toolbar .pf-output-voice { font-size: 12px; padding: 5px; }
.toolbar #special-char-buttons { flex-basis: 100%; }
.toolbar #special-char-buttons button { min-width: 30px; font-family: var(--pf-code-font); }
.toolbar #capsWarning { margin: 0; align-self: center; font-size: 12px; color: #fca5a5; }
@media (max-width: 600px) {
    .toolbar { max-height: 42vh; padding: 6px; gap: 6px; }
    .toolbar-group { flex: 1 1 100%; padding: 7px 8px; }
    .toolbar .pf-samples-dropdown { flex: 1; max-width: 100%; width: 160px; }
}

body[data-editor-mode="simple"] [data-advanced-only] { display: none !important; }
.toolbar-mode { --group-color: #a5b4fc; --group-bg: #313c68; }