/* ==========================================================================
   OmniKitHub.com - Global Stylesheet
   Version: 1.0 (Final & Production Ready)
   ========================================================================== */

/* 1. CSS Variables for Light & Dark Themes */
:root {
    --bg-primary: #f8fafc;
    --bg-surface: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.9);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --card-border: #e2e8f0;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --card-hover-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.1), 0 4px 6px -4px rgba(37, 99, 235, 0.1);
    --badge-bg: #f1f5f9;
    --badge-text: #334155;
    --ad-bg: #f8fafc;
    --ad-border: #cbd5e1;
    --footer-bg: #0f172a;
    --footer-text: #94a3b8;
    --footer-heading: #f8fafc;
    --transition-speed: 0.25s;
}

/* Dark Theme Overrides */
[data-theme="dark"],
body.dark-theme {
    --bg-primary: #0b0f19;
    --bg-surface: #111827;
    --bg-nav: rgba(17, 24, 39, 0.9);
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: rgba(59, 130, 246, 0.1);
    --card-border: #1f2937;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --card-hover-shadow: 0 10px 20px -3px rgba(59, 130, 246, 0.2);
    --badge-bg: #1f2937;
    --badge-text: #e5e7eb;
    --ad-bg: #111827;
    --ad-border: #374151;
    --footer-bg: #030712;
    --footer-text: #9ca3af;
    --footer-heading: #f9fafb;
}

/* 2. Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 3. Navigation Header */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-nav);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    padding: 16px 0;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-icon {
    color: var(--accent-color);
    font-size: 1.6rem;
}

.highlight {
    color: var(--accent-color);
}

.icon-btn {
    background: var(--badge-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-speed) ease;
}

.icon-btn:hover {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    transform: rotate(15deg);
}

/* 4. Hero Section & Live Search */
.hero-section {
    padding: 60px 0 40px;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.8px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 32px;
}

.search-box {
    position: relative;
    max-width: 650px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
}

.search-box input {
    width: 100%;
    padding: 16px 20px 16px 54px;
    font-size: 1rem;
    border-radius: 50px;
    border: 2px solid var(--card-border);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    outline: none;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-speed) ease;
}

.search-box input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-light);
}

/* 5. Ad Space Styling */
.ad-wrapper {
    margin: 30px auto;
}

.ad-placeholder {
    width: 100%;
    min-height: 90px;
    background-color: var(--ad-bg);
    border: 1px dashed var(--ad-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* 6. Tools Grid Section & Filters */
.tools-section {
    padding: 20px 0 60px;
    flex-grow: 1;
}

.section-header {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-btn {
    padding: 8px 18px;
    border-radius: 30px;
    border: 1px solid var(--card-border);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-speed) ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--accent-color);
}

.card-icon {
    width: 48px;
    height: 48px;
    background-color: var(--accent-light);
    color: var(--accent-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
}

.card-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background-color: var(--badge-bg);
    color: var(--badge-text);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
}

.tool-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 7. SEO Info Section */
.seo-info-section {
    padding: 40px 0;
    border-top: 1px solid var(--card-border);
    margin-top: 20px;
}

.seo-info-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.seo-info-section p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-top: 4px;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* 8. Footer Section */
.footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px 0 0;
    margin-top: auto;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    margin-top: 12px;
    max-width: 400px;
    font-size: 0.9rem;
}

.footer-brand .logo-text {
    color: var(--footer-heading);
}

.footer-links h4 {
    color: var(--footer-heading);
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--footer-text);
    font-size: 0.9rem;
    transition: color var(--transition-speed) ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 0.875rem;
}

/* 9. Responsive Breakpoints */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.85rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
    }

    .section-header {
        align-items: flex-start;
    }

    .category-filter {
        overflow-x: auto;
        white-space: nowrap;
        width: 100%;
        padding-bottom: 8px;
    }
}