:root {
    --bg: #0a0a0c;
    --bg-alt: #16161a;
    --text: #e1e1e6;
    --text-dim: #a1a1aa;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #10b981;
    --border: #27272a;
    --container-max: 1200px;
    --header-height: 80px;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Logo */
.main-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 12, 0.8);
    backdrop-filter: blur(10px);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text);
    font-family: 'Geist Mono', monospace;
}

.logo span {
    color: var(--primary);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-dim);
    font-weight: 500;
    transition: color 0.2s;
    font-size: 0.95rem;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--text);
}

/* Specific styling for the nav button to ensure it looks slick and aligned */
.nav-btn {
    padding: 0.5rem 1.25rem !important;
    font-size: 0.9rem !important;
    border-radius: 4px !important;
    background-color: transparent !important;
    border: 1px solid var(--primary) !important;
    color: var(--primary) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.nav-btn:hover {
    background-color: var(--primary) !important;
    color: #fff !important;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

/* Hero Sections */
.hero {
    padding: 120px 0;
    text-align: center;
}

.hero-small {
    padding: 80px 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background-color: var(--bg-alt);
}

.hero h1, .hero-small h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
    background: linear-gradient(to bottom right, #fff, #a1a1aa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Availability Badge */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2rem;
    letter-spacing: 0.5px;
}

.pulse {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    position: relative;
}

.pulse::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--accent);
    border-radius: 50%;
    animation: pulse-ring 1.5s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
}

@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(3); opacity: 0; }
}

.hero p, .hero-small p {
    font-size: 1.15rem;
    color: var(--text-dim);
    max-width: 700px;
    margin: 0 auto;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin: 3rem 0;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background-color: var(--border);
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
}

/* Service Detail */
.service-detail {
    padding: 40px 0;
}

.service-detail h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.feature-list {
    list-style: none;
    margin-top: 1.5rem;
}

.feature-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    align-items: center;
}

.bg-alt {
    background-color: var(--bg-alt);
}

/* Grids & Cards */
.grid {
    display: grid;
    gap: 2rem;
    margin: 4rem 0;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
    background-color: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 12px;
    transition: transform 0.3s, border-color 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.card p {
    color: var(--text-dim);
}

/* OSS Section Specifics */
.oss-card {
    border-top: 4px solid var(--primary);
}

.oss-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.oss-stat {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
}

.btn-text {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-text:hover {
    transform: translateX(5px);
}

/* Sections */
section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Footer */
.main-footer {
    border-top: 1px solid var(--border);
    padding: 80px 0 40px;
    background-color: var(--bg-alt);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    margin-top: 1rem;
    color: var(--text-dim);
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-bottom {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

/* Tooltips for abbreviations */
abbr[title] {
    text-decoration: underline dotted;
    text-decoration-color: var(--primary);
    cursor: help;
    border-bottom: none;
}

/* Responsive */
/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    z-index: 101;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text);
    transition: 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--bg-alt);
        border-left: 1px solid var(--border);
        padding: 80px 2rem 2rem;
        transition: right 0.3s ease;
        z-index: 100;
        box-shadow: -5px 0 15px rgba(0,0,0,0.5);
    }
    
    .main-nav.active {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}