/* --- MICROPHONE TEST PAGE CANVAS VISIBILITY FIX --- */
.mic-grid {
    display: block !important;
}

.visualization-container {
    display: flex !important;
}

.waveform-canvas,
.spectrogram-canvas {
    width: 100%;
    min-width: 200px;
    min-height: 80px;
    display: block;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}
/* Master CSS File - Universal styles for all pages */
/* Navigation, buttons, layout components, and common elements */

/* ===============================================
   CSS VARIABLES AND ROOT STYLES
   =============================================== */

/* Hide explainer text by default when JavaScript is enabled */
p.explainer {
    display: none;
}

:root {
    /* Color palette */
    --primary-blue: #1e3c72;
    --secondary-blue: #2a5298;
    --white: #ffffff;
    --light-gray: #e0e0e0;
    --medium-gray: #cccccc;
    --dark-overlay: rgba(0, 0, 0, 0.2);
    --light-overlay: rgba(255, 255, 255, 0.1);
    --medium-overlay: rgba(255, 255, 255, 0.15);
    --strong-overlay: rgba(255, 255, 255, 0.25);
    
    /* Typography */
    --font-family: 'Montserrat', Arial, sans-serif;
    --font-size-small: 0.8rem;
    --font-size-normal: 1rem;
    --font-size-medium: 1.1rem;
    --font-size-large: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-xxl: 2.2rem;
    --font-size-huge: 2.4rem;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.1s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
    
    /* Z-index layers */
    --z-overlay: 998;
    --z-modal: 999;
    --z-header: 1000;
}

/* ===============================================
   RESET AND BASE STYLES
   =============================================== */
/* * {
    box-sizing: border-box;
} */

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    font-family: var(--font-family);
    font-size: var(--font-size-normal);
    line-height: 1.6;
}

/* ===============================================
   TYPOGRAPHY
   =============================================== */
h1 {
    font-size: var(--font-size-huge);
    margin-bottom: var(--spacing-xl);
}

h2 {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-md);
}

/* ===============================================
   HEADER AND NAVIGATION
   =============================================== */
.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: var(--spacing-sm) var(--spacing-xl); /* Reduced from --spacing-md to --spacing-sm (16px to 8px) */
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.title-container {
    background: transparent;
    padding: 0;
    margin: 0;
    box-shadow: none;
}

.title {
    font-size: var(--font-size-xxl);
    font-weight: 400;
    color: var(--white);
    letter-spacing: 1px;
    margin: 0;
}

.title strong {
    font-weight: 700;
}

/* Navigation container */
.nav-container {
    position: relative;
}

/* Desktop navigation links */
.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

/* Navigation buttons */
.nav-btn {
    padding: var(--spacing-sm) var(--spacing-lg); /* Reduced vertical padding from --spacing-md to --spacing-sm */
    font-size: var(--font-size-medium);
    font-family: var(--font-family);
    background: var(--medium-overlay);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    font-weight: 600;
}

.nav-btn:hover {
    background: var(--strong-overlay);
    transform: translateY(-1px);
}

/* Hamburger menu button */
.hamburger-btn {
    display: none;
    background: var(--medium-overlay);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    width: 48px;
    height: 48px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    font-weight: bold;
    color: var(--white);
    font-family: monospace;
}

.hamburger-btn:hover {
    background: var(--strong-overlay);
}

.hamburger-btn::before {
    content: "☰";
}

.hamburger-btn.active::before {
    content: "✕";
}

/* Mobile navigation menu */
.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: 120px 30px 30px;
    transition: right var(--transition-slow);
    z-index: var(--z-modal);
    box-shadow: -2px 0 10px var(--dark-overlay);
}

.nav-menu.active {
    right: 0;
}

.nav-menu .nav-btn {
    display: block;
    width: 100%;
    margin-bottom: var(--spacing-md);
    text-align: center;
    background: var(--light-overlay);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.nav-menu .nav-btn:hover {
    background: var(--medium-overlay);
    transform: none;
}

.nav-menu .nav-btn.active {
    background: var(--strong-overlay);
    border-color: rgba(255, 255, 255, 0.4);
}

/* Mobile menu overlay */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===============================================
   BUTTON STYLES
   =============================================== */

/* Test buttons - Camera, Keyboard, Sound, etc. */
.test-btn {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-medium);
    font-family: var(--font-family);
    background: var(--secondary-blue);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background-color var(--transition-normal), transform var(--transition-fast);
}

.test-btn:hover {
    background: var(--primary-blue);
}

.test-btn:active {
    transform: scale(0.98);
}

/* Specific test button classes */
.camera-btn, .keyboard-btn, .sound-btn, .mic-btn, .mouse-btn, .pixel-btn, .touch-btn, .stress-btn, .network-btn {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-medium);
    font-family: var(--font-family);
    background: var(--secondary-blue);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background-color var(--transition-normal), transform var(--transition-fast);
}

.camera-btn:hover, .keyboard-btn:hover, .sound-btn:hover, .mic-btn:hover, .mouse-btn:hover, .pixel-btn:hover, .touch-btn:hover, .stress-btn:hover, .network-btn:hover {
    background: var(--primary-blue);
}

.camera-btn:active, .keyboard-btn:active, .sound-btn:active, .mic-btn:active, .mouse-btn:active, .pixel-btn:active, .touch-btn:active, .stress-btn:active, .network-btn:active {
    transform: scale(0.98);
}

/* Small control buttons */
.control-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-small);
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.control-btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.6;
}

/* Control button variants */
.control-btn--record {
    background: #e74c3c;
    color: var(--white);
}

.control-btn--record:hover:not(:disabled) {
    background: #c0392b;
}

.control-btn--play {
    background: #27ae60;
    color: var(--white);
}

.control-btn--play:hover:not(:disabled) {
    background: #219a52;
}

.control-btn--reset {
    background: #95a5a6;
    color: var(--white);
}

.control-btn--reset:hover:not(:disabled) {
    background: #7f8c8d;
}

.control-btn--start {
    background: rgba(76, 175, 80, 0.8);
    color: var(--white);
}

.control-btn--start:hover:not(:disabled) {
    background: rgba(76, 175, 80, 1);
}

.control-btn--stop {
    background: rgba(244, 67, 54, 0.8);
    color: var(--white);
}

.control-btn--stop:hover:not(:disabled) {
    background: rgba(244, 67, 54, 1);
}

/* Additional button styles for specific test functions */
.speaker-btn {
    padding: var(--spacing-lg);
    font-size: var(--font-size-medium);
    font-family: var(--font-family);
    background: var(--light-overlay);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.speaker-btn.left {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.1) 0%, rgba(46, 204, 113, 0.2) 100%);
    border-color: rgba(46, 204, 113, 0.3);
}

.speaker-btn.right {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0.2) 100%);
    border-color: rgba(52, 152, 219, 0.3);
}

.record-btn, .play-btn, .reset-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-small);
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.record-btn {
    background: #e74c3c;
    color: var(--white);
}

.record-btn:hover {
    background: #c0392b;
}

.play-btn {
    background: #27ae60;
    color: var(--white);
}

.play-btn:hover:not(:disabled) {
    background: #219a52;
}

.reset-btn {
    background: #95a5a6;
    color: var(--white);
}

.reset-btn:hover:not(:disabled) {
    background: #7f8c8d;
}

.record-btn:disabled, .play-btn:disabled, .reset-btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.6;
}

/* ===============================================
   FORM ELEMENTS
   =============================================== */
.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-normal);
    transition: border-color var(--transition-slow);
}

.form-input:focus {
    outline: none;
    border-color: var(--secondary-blue);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-select {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-normal);
    font-family: var(--font-family);
    background: rgba(42, 82, 152, 0.6);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.form-select:hover {
    background: rgba(42, 82, 152, 0.8);
    border-color: rgba(255, 255, 255, 0.3);
}

.form-select option {
    background: var(--secondary-blue);
    color: var(--white);
    padding: var(--spacing-sm);
}

/* Range inputs */
.range-input {
    width: 100%;
    margin: var(--spacing-sm) 0;
    background: var(--light-overlay);
    border-radius: var(--radius-lg);
    height: 6px;
    -webkit-appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--white);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

/* ===============================================
   CARDS AND CONTAINERS
   =============================================== */
.card {
    background: var(--light-overlay);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin: var(--spacing-xl) auto;
    width: 90%;
    max-width: 1200px;
}

/* Explainer container for test pages (white background, matches FAQ/mic test) */
.explainer-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    padding: 32px 32px 24px 32px;
    margin: 32px auto 0 auto;
    max-width: 800px;
    color: #2a5298;
    font-size: 1.1rem;
    line-height: 1.7;
    box-sizing: border-box;
}

.explainer-container ul {
    color: #2a5298;
    margin: 16px 0 0 20px;
    padding-left: 20px;
}

.explainer-container li {
    margin: 8px 0;
    line-height: 1.4;
}

.explainer-container strong {
    color: #1e3c72;
}

.card--compact {
    padding: var(--spacing-md);
    margin: var(--spacing-lg) auto;
}

.card--wide {
    max-width: 1400px;
}

.card--narrow {
    max-width: 800px;
}

/* ===============================================
   GRID LAYOUTS
   =============================================== */
.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.grid-two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

/* ===============================================
   COMMON COMPONENTS
   =============================================== */

/* Fullscreen button */
.fullscreen-btn {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow), background-color var(--transition-normal);
    z-index: 10;
}

.fullscreen-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

/* Permission note */
.permission-note {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.8);
    background: rgba(42, 82, 152, 0.3);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    backdrop-filter: blur(4px);
    display: none;
}

.network-note {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.8);
    background: rgba(42, 82, 152, 0.3);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    backdrop-filter: blur(4px);
}

/* Status messages */
.status-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
}

.status-message--success {
    background-color: rgba(40, 167, 69, 0.1);
    border: 1px solid rgba(40, 167, 69, 0.2);
    color: #28a745;
}

.status-message--error {
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    color: #dc3545;
}

/* ===============================================
   UTILITY CLASSES
   =============================================== */
.text-center {
    text-align: center;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===============================================
   MEDIA QUERIES
   =============================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger-btn {
        display: flex;
    }
    
    .grid-two {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .header {
        padding: var(--spacing-md) 20px;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .nav-menu {
        width: 250px;
        padding: 70px 20px 20px;
    }
}

/* Question Banner Styles */
.question-banner {
    position: fixed; /* Changed to fixed for overlay behavior */
    top: var(--spacing-md); /* Position at the top with a small margin */
    left: 50%;
    transform: translateX(-50%); /* Center horizontally */
    width: 90%; /* Responsive width */
    max-width: 600px; /* Max width for the overlay window */
    background-color: var(--secondary-blue); /* Changed to the darker blue */
    color: var(--white); /* Text on this banner should be white */
    padding: var(--spacing-lg);
    text-align: center;
    z-index: 1010; /* High z-index to be on top of other content */
    box-shadow: var(--shadow-lg); /* Matches mic-grid */
    border-radius: var(--radius-xl); /* Updated to match mic-grid (12px) */
    display: flex; 
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

/* Style for the close button on the banner */
.close-banner-button {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--white); /* White to be visible on the new banner background */
    font-size: var(--font-size-large); /* Make it easily clickable */
    font-weight: bold;
    cursor: pointer;
    padding: 0; /* Minimal padding */
    line-height: 1; /* Ensure tight fit */
}

.close-banner-button:hover {
    color: var(--light-gray); /* Lighter gray for hover */
}

.question-text {
    background-color: var(--primary-blue); /* Changed to the page background's darker blue */
    color: var(--white); /* White text for contrast */
    padding: var(--spacing-md);
    border-radius: var(--radius-md); /* Rounded corners for the question box */
    margin-bottom: var(--spacing-md); /* Space between question and answer options */
    width: 90%; /* Make the question box take most of the banner width */
    box-sizing: border-box; /* Include padding and border in the element's total width and height */
}

.answer-options button {
    background-color: var(--medium-overlay); /* Changed to medium-overlay for better contrast on secondary-blue */
    color: var(--white);
    border: 1px solid var(--light-gray); /* Light gray border for buttons */
    padding: var(--spacing-sm) var(--spacing-md);
    margin: 0 var(--spacing-xs);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-normal);
}

.answer-options button:hover {
    background-color: var(--strong-overlay); /* Darker overlay for hover */
}

/* ===============================================
   RESPONSIVE DESIGN
   =============================================== */
@media screen and (max-width: 768px) {
    /* Adjust font sizes for mobile */
    :root {
        --font-size-huge: 2rem;
        --font-size-xxl: 1.8rem;
        --font-size-xl: 1.4rem;
        --font-size-large: 1.2rem;
    }

    /* General container adjustments */
    .container {
        width: 100%;
        padding: 0 16px;
        margin: 0 auto;
    }

    /* Header adjustments */
    .header {
        padding: 12px;
    }

    .title {
        font-size: var(--font-size-xl);
    }

    /* General content adjustments */
    img, video, canvas {
        max-width: 100%;
        height: auto;
    }

    /* Prevent horizontal scrolling */
    body {
        overflow-x: hidden;
        width: 100%;
    }

    /* Add touch-friendly tap targets */
    button, 
    .nav-btn,
    input[type="button"],
    input[type="submit"] {
        min-height: 44px;
        min-width: 44px;
        padding: 12px;
    }
}

/* Utility classes for responsive design */
.overflow-auto {
    overflow: auto;
    -webkit-overflow-scrolling: touch;
}

.w-full {
    width: 100%;
}

.text-center {
    text-align: center;
}

/* End of responsive design section */