/* ========================================
   Screen Tester - CalWhat Platform
   Purpose: Full-screen display testing tool
   Mobile-first design with gesture support
   ======================================== */

/* Reset HTML and Body for full-screen mode */
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

/* Global Body Styles */
body {
    font-family: 'Noto Sans TC', sans-serif;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    min-height: 100vh;
    padding: 15px 0;
    margin: 0;
    width: 100%;
}

.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}


@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* SEO Section Styles */
.seo-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    padding: 40px;
    margin-top: 40px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.seo-section h2 {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid #667eea;
}

.seo-section h3 {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: #4a5568;
    margin-top: 30px;
    margin-bottom: 15px;
}

.seo-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #667eea;
    margin-top: 20px;
    margin-bottom: 10px;
}

.seo-section p {
    font-size: 1rem;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 15px;
}

.seo-section ul,
.seo-section ol {
    margin-left: 25px;
    margin-bottom: 20px;
}

.seo-section li {
    font-size: 1rem;
    line-height: 1.8;
    color: #4a5568;
    margin-bottom: 10px;
}

.seo-section strong {
    color: #667eea;
    font-weight: 600;
}

.seo-section a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.seo-section a:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* Category Selection Screen */
.category-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.category-container h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.category-container .text-muted {
    color: #718096;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Glass Cards for Categories */
.category-card {
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.25);
    background: rgba(255, 255, 255, 1);
}

.category-card:active {
    transform: translateY(-2px);
}

.category-icon {
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.category-icon i {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 4rem !important;
}

.category-card:hover .category-icon {
    transform: scale(1.1);
}

.category-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #2d3748;
}

.category-desc {
    color: #718096;
    font-size: 1rem;
    margin-bottom: 0;
    text-align: center;
    line-height: 1.6;
}

/* Test Mode - Full Screen Canvas */
#testCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    display: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    margin: 0;
    padding: 0;
    border: none;
    overflow: hidden;
}

#testCanvas.active {
    display: block;
}

/* Pattern Info Overlay */
.pattern-info-overlay {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 20px;
    color: white;
    font-size: 0.9rem;
    text-align: center;
    pointer-events: none;
    transition: opacity 0.3s ease;
    max-width: 90%;
}

.pattern-info-overlay.hidden {
    opacity: 0;
}

.pattern-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.pattern-hex {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #a0aec0;
}

.pattern-page {
    font-size: 0.75rem;
    color: #cbd5e0;
    margin-top: 4px;
}

/* Navigation Hints */
.nav-hints {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.nav-hints.fade-out {
    opacity: 0;
}

.nav-hint {
    position: absolute;
    background: rgba(0, 0, 0, 0.4);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.8rem;
    backdrop-filter: blur(5px);
}

.nav-hint-top {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.nav-hint-left {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.nav-hint-right {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.nav-hint i {
    margin-right: 6px;
}

/* Click Areas (invisible, for accessibility) */
.click-area {
    position: absolute;
    cursor: pointer;
    z-index: 10;
}

.click-area-top {
    top: 0;
    left: 0;
    right: 0;
    height: 15vh;
}

.click-area-left {
    left: 0;
    top: 15vh;
    bottom: 0;
    width: 25%;
}

.click-area-right {
    right: 0;
    top: 15vh;
    bottom: 0;
    width: 25%;
}

/* Gradient Patterns */
.gradient-linear {
    background: linear-gradient(to bottom, var(--grad-from), var(--grad-to));
}

.gradient-stepped {
    background: linear-gradient(to bottom,
        #000000 0%, #000000 16.66%,
        #333333 16.66%, #333333 33.33%,
        #666666 33.33%, #666666 50%,
        #999999 50%, #999999 66.66%,
        #CCCCCC 66.66%, #CCCCCC 83.33%,
        #FFFFFF 83.33%, #FFFFFF 100%
    );
}

.gradient-rgb {
    background: linear-gradient(to bottom,
        #FF0000 0%,
        #FFFF00 25%,
        #00FF00 50%,
        #00FFFF 75%,
        #0000FF 100%
    );
}

/* Responsive Design - Tablet */
@media (max-width: 991px) {
    .page-header h1 {
        font-size: 2.2rem;
    }

    .page-header .subtitle {
        font-size: 1rem;
    }

    .seo-section {
        padding: 30px;
    }

    .seo-section h2 {
        font-size: 1.6rem;
    }

    .seo-section h3 {
        font-size: 1.3rem;
    }
}

/* Responsive Design - Mobile */
@media (max-width: 768px) {
    body {
        padding: 10px 0;
    }

    .main-container {
        padding: 0 15px;
    }

    .page-header {
        margin-bottom: 25px;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .page-header .subtitle {
        font-size: 0.9rem;
    }

    .category-container {
        padding: 1rem 0.5rem;
    }

    .category-card {
        min-height: 150px;
        padding: 1.5rem;
        margin-bottom: 1rem;
    }

    .category-icon i {
        font-size: 2.5rem !important;
    }

    .category-desc {
        font-size: 0.85rem;
    }

    .seo-section {
        padding: 20px;
        margin-top: 30px;
    }

    .seo-section h2 {
        font-size: 1.4rem;
    }

    .seo-section h3 {
        font-size: 1.2rem;
        margin-top: 20px;
    }

    .seo-section h4 {
        font-size: 1.05rem;
    }

    .seo-section p,
    .seo-section li {
        font-size: 0.95rem;
    }

    .pattern-info-overlay {
        bottom: 15px;
        padding: 10px 20px;
        font-size: 0.85rem;
    }

    .pattern-name {
        font-size: 1rem;
    }

    .nav-hint {
        font-size: 0.7rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .category-card {
        min-height: 130px;
        padding: 1rem;
    }

    .category-icon i {
        font-size: 2rem !important;
    }

    .pattern-info-overlay {
        bottom: 10px;
        padding: 8px 16px;
        font-size: 0.8rem;
    }
}

/* Desktop Enhancements */
@media (min-width: 1024px) {
    .category-container {
        padding: 3rem 2rem;
    }

    .category-card {
        min-height: 200px;
    }

    .click-area-left,
    .click-area-right {
        width: 30%;
    }
}

/* Accessibility - High Contrast Mode */
@media (prefers-contrast: high) {
    .pattern-info-overlay {
        background: rgba(0, 0, 0, 0.9);
        border: 2px solid white;
    }

    .nav-hint {
        background: rgba(0, 0, 0, 0.8);
        border: 1px solid white;
    }
}

/* Prevent touch interference */
#testCanvas * {
    touch-action: none;
    -webkit-touch-callout: none;
}

/* Loading State */
.category-card.loading {
    pointer-events: none;
    opacity: 0.6;
}

/* Animation for smooth transitions */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-card {
    animation: fadeIn 0.4s ease-out;
}

.category-card:nth-child(1) {
    animation-delay: 0.1s;
}

.category-card:nth-child(2) {
    animation-delay: 0.2s;
}

.category-card:nth-child(3) {
    animation-delay: 0.3s;
}