@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --grid-color: rgba(37, 99, 235, 0.04);
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --card-hover-border: #93c5fd;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 10px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(37, 99, 235, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Tech Background layer */
.page-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -2;
    pointer-events: none;
}

/* Canvas for hover animation */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.025em;
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.search-box {
    position: relative;
    width: 100%;
    max-width: 320px;
}

.search-input {
    width: 100%;
    padding: 0.65rem 1rem 0.65rem 2.5rem;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    background: var(--bg-secondary);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input:focus~.search-icon {
    color: var(--primary);
}

/* Main Content */
.main-container {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}

.header-text {
    text-align: center;
    margin-bottom: 4rem;
}

.header-text h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.header-text h1 span {
    color: var(--primary);
}

.header-text p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid System */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* Tech Card Design */
.card-item {
    display: block;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    /* Slightly sharp for tech feel */
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

/* Animated Corner Accent */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-top: 2px solid transparent;
    border-left: 2px solid transparent;
    transition: var(--transition);
}

/* Animated Bottom Accent */
.card::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    border-bottom: 2px solid transparent;
    border-right: 2px solid transparent;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-hover);
}

.card:hover::before {
    border-top-color: var(--primary);
    border-left-color: var(--primary);
}

.card:hover::after {
    border-bottom-color: var(--primary);
    border-right-color: var(--primary);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.icon-wrapper {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 6px;
    background: var(--bg-primary);
    border: 1px solid var(--card-border);
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.icon-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-title-group {
    display: flex;
    flex-direction: column;
}

.card-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

.card-subtitle {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    color: var(--primary);
    margin-top: 0.3rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.card-btn {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--primary);
    color: #ffffff;
    text-decoration: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 4px;
    transition: var(--transition);
    border: 1px solid var(--primary);
}

.card-btn::after {
    content: '→';
    transition: transform 0.2s ease;
    color: #ffffff;
}

.card:hover .card-btn {
    background: linear-gradient(135deg, var(--primary) 0%, #0f172a 100%);
    color: #ffffff;
    border-color: #0f172a;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.card:hover .card-btn::after {
    transform: translateX(4px);
    color: #ffffff;
}

/* Empty Search */
.no-results {
    display: none;
    grid-column: 1 / -1;
    text-align: center;
    padding: 3.5rem;
    color: var(--text-muted);
    background: var(--card-bg);
    border-radius: 4px;
    border: 1px dashed var(--card-border);
    font-family: 'Space Grotesk', sans-serif;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .search-box {
        max-width: 100%;
    }

    .header-text h1 {
        font-size: 2rem;
    }
}

/* Footer Section */
.app-footer {
    text-align: center;
    padding: 2rem 1.5rem;
    margin-top: 2rem;
    border-top: 1px dashed var(--card-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.4);
}

.app-footer p {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.app-footer a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 600;
}

.app-footer a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}