:root {
    --slate-800: #1e293b;
    --emerald-600: #059669;
    --emerald-50: #ecfdf5;
    --leaf-green: #10b981;
    --glass: rgba(255, 255, 255, 0.95);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    color: var(--slate-800);
    background-color: #fcfdfd;
    margin: 0;
    overflow-x: hidden;
}

/* Nav Bar - Sticky & Glassmorphism */
nav {
    padding: 16px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.brand-logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: #064e3b;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--slate-800);
    margin-left: 32px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.nav-links a:hover { color: var(--emerald-600); }

/* Hamburger Menu (Hidden by default) */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    position: relative;
}

.hamburger-icon, .hamburger-icon::before, .hamburger-icon::after {
    width: 24px;
    height: 2px;
    background: var(--slate-800);
    transition: all 0.3s ease-in-out;
    display: block;
}

.hamburger-icon::before, .hamburger-icon::after {
    content: '';
    position: absolute;
    left: 8px;
}

.hamburger-icon::before { transform: translateY(-8px); }
.hamburger-icon::after { transform: translateY(8px); }

/* Hero Section */
header {
    padding: 100px 5%;
    background: #ffffff;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    background: linear-gradient(to right, #064e3b, #10b981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-desc {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.25rem;
    color: #64748b;
}

.cta-container {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: var(--emerald-600);
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.2s ease;
    border: 1px solid var(--emerald-600);
    box-sizing: border-box;
}

.cta-button:hover {
    background: #047857;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.2);
}

.cta-button.secondary {
    background: #ffffff;
    color: var(--slate-800);
    border: 1px solid #e2e8f0;
}

.cta-button.secondary:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

/* Layout & Cards */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 5%;
}

.text-block {
    max-width: 800px;
    margin: 0 auto 60px auto;
    font-size: 1.15rem;
    color: #475569;
}

.text-block h2 {
    color: var(--slate-800);
    font-size: 2.2rem;
    margin-bottom: 24px;
}

.text-block p { margin-bottom: 20px; }
.text-block strong { color: var(--slate-800); }

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin: 60px 0;
}

.concept-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    padding: 40px;
    border-radius: 24px;
    transition: all 0.3s ease;
    height: 100%;
    box-sizing: border-box;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}

.concept-card:hover {
    transform: translateY(-6px);
    border-color: var(--emerald-600);
    box-shadow: 0 12px 20px -3px rgba(5, 150, 105, 0.1);
}

.tag {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--emerald-600);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: block;
}

/* Enhanced Data Table */
.table-wrapper {
    width: 100%;
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    margin: 40px 0;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

.data-table th {
    background: #f8fafc;
    padding: 20px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #e2e8f0;
}

.data-table td {
    padding: 20px;
    border-bottom: 1px solid #f1f5f9;
    color: #475569;
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* Banners & Notes */
.feature-banner {
    background: var(--emerald-50);
    border-radius: 24px;
    padding: 60px 5%;
    text-align: center;
    margin: 80px 0;
    border: 1px solid #d1fae5;
}

.pro-note {
    background: var(--emerald-50);
    border-left: 4px solid var(--emerald-600);
    padding: 30px 40px;
    margin: 60px auto;
    border-radius: 0 16px 16px 0;
    max-width: 800px;
    color: #334155;
}

footer {
    background: #064e3b;
    color: #ecfdf5;
    padding: 80px 5%;
    text-align: center;
}

footer a { color: #a7f3d0; text-decoration: none; font-weight: 500;}
footer a:hover { text-decoration: underline; }

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .menu-toggle { display: block; }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--glass);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
        border-bottom: 1px solid #e2e8f0;
    }

    .nav-links.active {
        max-height: 350px;
        padding: 10px 0 20px 0;
    }

    .nav-links a {
        margin: 0;
        padding: 16px 5%;
        font-size: 1.1rem;
        border-bottom: 1px solid #f1f5f9;
    }
    .nav-links a:last-child { border-bottom: none; }

    .menu-toggle[aria-expanded="true"] .hamburger-icon { background: transparent; }
    .menu-toggle[aria-expanded="true"] .hamburger-icon::before { transform: rotate(45deg); top: 0; }
    .menu-toggle[aria-expanded="true"] .hamburger-icon::after { transform: rotate(-45deg); top: 0; }

    header { padding: 60px 5%; }
    .hero-title { font-size: 2.75rem; }
    .hero-desc { font-size: 1.1rem; }

    .cta-container { flex-direction: column; width: 100%; gap: 12px;}
    .cta-button { width: 100%; }
    .cta-button.secondary { margin-left: 0; }

    .container { padding: 60px 5%; }
    .text-block h2 { font-size: 1.75rem; }
    .concept-card { padding: 30px; }
    .comparison-grid { grid-template-columns: 1fr; gap: 24px; }
    .feature-banner { padding: 40px 20px; }

    .pro-note {
        padding: 24px;
        border-radius: 12px;
        border-left: none;
        border-top: 4px solid var(--emerald-600);
    }
}