Initial

style.css

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+:root {
+    --primary-color: #2196F3;
+    --secondary-color: #00A8F3;
+    --background-color: #1B1B1B;
+    --card-bg: #2A2A2A;
+    --text-primary: #FFFFFF;
+    --text-secondary: #BBBBBB;
+    --border-color: #3A3A3A;
+    --padding: 12px;
+    --border-radius: 4px;
+    --font-size: 14px;
+    --box-shadow: 0 2px 8px rgba(0,0,0,0.2);
+    --hover-box-shadow: 0 5px 15px rgba(33,150,243,0.2);
+    --transition-duration: 0.3s;
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+    font-family: 'Roboto', sans-serif;
+}
+
+body, html {
+    height: 100%;
+}
+
+body {
+    background-color: var(--background-color);
+    color: var(--text-primary);
+}
+
+.flex-container {
+    display: flex;
+    flex-direction: column;
+    min-height: 100vh;
+}
+
+.container {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 20px;
+    flex: 1;
+}
+
+header {
+    margin-bottom: 30px;
+}
+
+h1 {
+    color: var(--text-primary);
+    font-weight: 500;
+    font-size: 28px;
+    margin-bottom: 20px;
+}
+
+.search-box {
+    display: flex;
+    gap: 10px;
+    margin-bottom: 20px;
+    width: 100%;
+}
+
+[data-search] {
+    background: var(--card-bg);
+    border: 1px solid var(--border-color);
+    color: var(--text-primary);
+    padding: var(--padding);
+    border-radius: var(--border-radius);
+    flex: 1;
+}
+
+[data-search]::placeholder {
+    color: var(--text-secondary);
+}
+
+.filter-container {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+}
+
+.categories-filter {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    justify-content: center;
+}
+
+.category-button {
+    background: var(--card-bg);
+    border: 1px solid var(--border-color);
+    color: var(--text-secondary);
+    padding: var(--padding);
+    border-radius: var(--border-radius);
+    cursor: pointer;
+    transition: all 0.2s;
+    font-size: var(--font-size);
+}
+
+.category-button.active {
+    background: var(--primary-color);
+    color: var(--text-primary);
+    border-color: var(--primary-color);
+}
+
+.category-button:hover {
+    border-color: var(--primary-color);
+    color: var (--primary-color);
+}
+
+.category-button.active:hover {
+    color: var(--text-primary);
+}
+
+[data-material-grid] {
+    column-count: 4;
+    column-gap: 20px;
+    max-width: 1200px;
+    margin: 0 auto;
+}
+
+.material-card {
+    display: inline-block;
+    width: 100%;
+    margin-bottom: 20px;
+    background: var(--card-bg);
+    border: 1px solid var(--border-color);
+    border-radius: var(--border-radius);
+    overflow: hidden;
+    box-shadow: var(--box-shadow);
+    transition: transform 0.2s, opacity var(--transition-duration);
+    cursor: pointer;
+    opacity: 1;
+    animation: fadeIn var(--transition-duration) ease-in;
+}
+
+.material-card.hide {
+    opacity: 0;
+    transform: scale(0.95);
+    animation: fadeOut var(--transition-duration) ease-out;
+}
+
+.material-card.show {
+    opacity: 1;
+    transform: scale(1);
+}
+
+.material-card:hover {
+    transform: translateY(-5px);
+    border-color: var(--primary-color);
+    box-shadow: var(--hover-box-shadow);
+}
+
+.material-preview {
+    width: 100%;
+    height: auto;
+    object-fit: contain;
+}
+
+.material-info {
+    padding: 15px;
+}
+
+.material-info h3 {
+    margin-bottom: 8px;
+    color: var(--text-primary);
+    font-size: 16px;
+    font-weight: 500;
+}
+
+.material-info p {
+    color: var(--text-secondary);
+    font-size: 14px;
+}
+
+.material-tags {
+    margin-top: 10px;
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px;
+}
+
+.tag {
+    background: var(--card-bg);
+    border: 1px solid var(--border-color);
+    color: var(--text-secondary);
+    padding: 3px 8px;
+    border-radius: var(--border-radius);
+    font-size: 12px;
+    cursor: pointer;
+    user-select: none;
+}
+
+.tag:hover {
+    background: var(--primary-color);
+    color: var(--text-primary);
+}
+
+.copy-notification {
+    position: fixed;
+    background: var(--primary-color);
+    color: white;
+    padding: 8px 12px;
+    border-radius: var(--border-radius);
+    font-size: 14px;
+    pointer-events: none;
+    transform: translate(-50%, 0);
+    animation: floatUp 1s ease-out forwards;
+    z-index: 1000;
+    box-shadow: var(--hover-box-shadow);
+    font-weight: 500;
+}
+
+@keyframes floatUp {
+    0% {
+        opacity: 1;
+        transform: translate(-50%, 0);
+    }
+    100% {
+        opacity: 0;
+        transform: translate(-50%, -30px);
+    }
+}
+
+@keyframes fadeIn {
+    0% {
+        opacity: 0;
+        transform: scale(0.95);
+    }
+    100% {
+        opacity: 1;
+        transform: scale(1);
+    }
+}
+
+@keyframes fadeOut {
+    0% {
+        opacity: 1;
+        transform: scale(1);
+    }
+    100% {
+        opacity: 0;
+        transform: scale(0.95);
+    }
+}
+
+.header-content {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+#convert-button {
+    display: none;
+}
+
+footer {
+    background-color: var(--background-color);
+    color: var(--text-secondary);
+    padding: 20px 0;
+    text-align: center;
+    border-top: 1px solid var(--border-color);
+}
+
+.footer-content {
+    max-width: 1200px;
+    margin: 0 auto;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 10px;
+}
+
+.footer-content p {
+    margin: 0;
+    font-size: var(--font-size);
+}
+
+.footer-content nav {
+    display: flex;
+    gap: 20px;
+}
+
+.footer-content nav a {
+    color: var(--text-secondary);
+    text-decoration: none;
+    transition: color 0.2s;
+}
+
+.footer-content nav a:hover {
+    color: var(--primary-color);
+}