/* ═══════════════════════════════════════
   TOOLPRIME - PREMIUM CLEAN DESIGN
   Crystal Clear, Modern, Professional
   ═══════════════════════════════════════ */

:root {
    --bg: #f0f2f5;
    --surface: #ffffff;
    --border: #e4e6eb;
    --text: #1c1e21;
    --text-secondary: #65676b;
    --text-muted: #8a8d91;
    --primary: #1877f2;
    --primary-light: #e7f3ff;
    --green: #42b72a;
    --red: #fa383e;
    --orange: #f7b928;
    --purple: #8b5cf6;
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-xl: 0 8px 24px rgba(0,0,0,0.12);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ═══════════ HEADER ═══════════ */
.header {
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 60px;
    gap: 20px;
}

.brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 10px;
    flex-shrink: 0;
}

.brand img { height: 36px; width: auto; }

.brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #1877f2, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: none;
}

.search-box {
    flex: 1;
    max-width: 520px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 12px 18px 12px 46px;
    background: var(--bg);
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 0.92rem;
    font-family: inherit;
    color: var(--text);
    outline: none;
    transition: var(--transition);
}

.search-box input:hover { background: #e8eaed; }

.search-box input:focus {
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(24,119,242,0.1);
}

.search-box input::placeholder { color: var(--text-muted); }

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--text-muted);
}

/* ═══════════ HERO ═══════════ */
.hero {
    background: var(--surface);
    padding: 32px 20px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}

.hero p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* ═══════════ STATS ═══════════ */
.stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 18px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg);
    border-radius: 50px;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ═══════════ CATEGORIES ═══════════ */
.categories {
    display: flex;
    gap: 8px;
    padding: 14px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
    position: sticky;
    top: 60px;
    z-index: 50;
}

.categories::-webkit-scrollbar { display: none; }

.cat-btn {
    padding: 9px 20px;
    border-radius: 50px;
    border: none;
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 0.84rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.cat-btn:hover {
    background: #e4e6eb;
    color: var(--text);
}

.cat-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(24,119,242,0.3);
}

/* ═══════════ MAIN ═══════════ */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(175px, 1fr));
    gap: 14px;
}

/* ═══════════ CARD ═══════════ */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 20px 16px 16px;
    text-decoration: none;
    color: var(--text);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translateY(-3px);
}

.card .icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #e7f3ff, #f0e7ff);
    border-radius: 16px;
}

.card:nth-child(2n) .icon { background: linear-gradient(135deg, #e7ffe7, #e7f3ff); }
.card:nth-child(3n) .icon { background: linear-gradient(135deg, #fff3e7, #ffe7f0); }
.card:nth-child(4n) .icon { background: linear-gradient(135deg, #f0e7ff, #e7f3ff); }

.card .icon img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.card .name {
    font-size: 0.84rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 4px;
}

.card .rating {
    font-size: 0.75rem;
    color: var(--orange);
    margin: 2px 0 6px;
}

.card .tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.2px;
}

/* ═══════════ EMPTY ═══════════ */
.empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 4px;
}

.empty p { color: var(--text-secondary); font-size: 0.88rem; }

/* ═══════════ FOOTER ═══════════ */
.footer {
    border-top: 1px solid var(--border);
    padding: 24px 20px;
    background: var(--surface);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-links a:hover { color: var(--primary); }

.footer-copy {
    color: var(--text-muted);
    font-size: 0.74rem;
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (min-width: 768px) {
    .grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
    .card { padding: 24px 18px 18px; }
    .hero h1 { font-size: 1.8rem; }
}

@media (min-width: 1200px) {
    .grid { grid-template-columns: repeat(auto-fill, minmax(185px, 1fr)); gap: 18px; }
}

@media (max-width: 600px) {
    .header { padding: 0 12px; }
    .header-inner { height: 54px; gap: 10px; }
    .brand img { height: 30px; }
    .search-box { max-width: 220px; }
    .search-box input { padding: 10px 14px 10px 38px; font-size: 0.85rem; }
    .search-icon { left: 14px; font-size: 0.9rem; }
    
    .hero { padding: 22px 14px 16px; }
    .hero h1 { font-size: 1.3rem; }
    .hero p { font-size: 0.84rem; }
    .stats { gap: 8px; }
    .stat-item { padding: 6px 12px; }
    
    .categories { padding: 10px 12px; top: 54px; gap: 6px; }
    .cat-btn { padding: 8px 16px; font-size: 0.8rem; }
    
    .main { padding: 14px 10px; }
    .grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .card { padding: 16px 12px 12px; border-radius: var(--radius); }
    .card .icon { width: 50px; height: 50px; font-size: 2rem; border-radius: 14px; }
    .card .name { font-size: 0.78rem; }
}

@media (max-width: 380px) {
    .grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .card { padding: 12px 8px; }
    .card .icon { width: 44px; height: 44px; font-size: 1.6rem; }
    .card .name { font-size: 0.72rem; }
}