* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace, -apple-system, sans-serif;
}

:root {
    /* Neo-Brutalist Light Theme */
    --bg-color: #ffffff;
    --text-color: #08080a;
    --primary-color: #facc15; /* Duck Yellow */
    --secondary-color: #00f0ff; /* Electric Cyan */
    --border-color: #08080a;
    --shadow-color: #08080a;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.98);
}

[data-theme="dark"] {
    /* Neo-Brutalist Dark Theme */
    --bg-color: #08080a;
    --text-color: #ffffff;
    --primary-color: #facc15;
    --secondary-color: #00f0ff;
    --border-color: #facc15;
    --shadow-color: #facc15;
    --card-bg: #121212;
    --nav-bg: rgba(8, 8, 10, 0.98);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

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

/* Marquee */
.marquee-container {
    background: var(--primary-color);
    color: #08080a;
    overflow: hidden;
    white-space: nowrap;
    padding: 0.5rem 0;
    border-bottom: 2px solid #08080a;
    font-weight: 900;
    text-transform: uppercase;
    position: relative;
    z-index: 1001;
}

.marquee-content {
    display: inline-block;
    animation: marquee 15s linear infinite;
    font-size: 1rem;
    letter-spacing: 2px;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Header & Nav */
header {
    position: sticky;
    top: 0;
    width: 100%;
    background: var(--nav-bg);
    border-bottom: 2px solid var(--border-color);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-color);
    text-shadow: 2px 2px 0px var(--primary-color);
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    font-weight: bold;
    padding: 0.5rem 1rem;
    border: 2px solid transparent;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.nav-links a:hover {
    background: var(--primary-color);
    color: #08080a;
    border: 2px solid var(--border-color);
    box-shadow: 2px 2px 0px var(--shadow-color);
    transform: translate(-2px, -2px);
}

.nav-links a.highlight {
    background: var(--secondary-color);
    color: #08080a;
    border: 2px solid var(--border-color);
    box-shadow: 2px 2px 0px var(--shadow-color);
}
.nav-links a.highlight:hover {
    transform: translate(-2px, -2px);
}

/* Theme Toggle */
.theme-btn {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 3px 3px 0px var(--shadow-color);
    transition: all 0.1s;
    padding: 0;
}
.theme-btn svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.theme-btn:active {
    transform: translate(3px, 3px);
    box-shadow: 0px 0px 0px var(--shadow-color);
}

/* UI Elements */
.brutalist-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #08080a !important;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 900;
    border: 2px solid #08080a;
    box-shadow: 4px 4px 0px var(--shadow-color);
    transition: transform 0.1s, box-shadow 0.1s;
    text-transform: uppercase;
    cursor: pointer;
}

.brutalist-btn:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--shadow-color);
}

.brutalist-btn.secondary {
    background-color: var(--bg-color);
    color: var(--text-color) !important;
    border-color: var(--border-color);
}

/* Hero Section */
.hero {
    padding: 6rem 5%;
    text-align: left;
    max-width: 1400px;
    margin: 0 auto;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hero h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    text-transform: uppercase;
}

.hero h1 .brand {
    color: var(--primary-color);
    text-shadow: 3px 3px 0px var(--border-color);
    display: block;
}

.hero p {
    font-size: 1.25rem;
    font-weight: bold;
    max-width: 800px;
    border-left: 4px solid var(--secondary-color);
    padding-left: 1rem;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

/* Sections General */
section.content-section {
    padding: 5rem 5%;
    max-width: 1400px;
    margin: 0 auto;
    border-bottom: 2px solid var(--border-color);
}

.section-header {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 3rem;
    display: inline-block;
    background: var(--secondary-color);
    color: #08080a;
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    box-shadow: 4px 4px 0px var(--shadow-color);
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

/* Brutalist Cards */
.b-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    padding: 2rem;
    box-shadow: 6px 6px 0px var(--shadow-color);
    transition: all 0.2s;
    position: relative;
}

.b-card:hover {
    border-color: var(--primary-color);
    box-shadow: 6px 6px 0px var(--primary-color);
}

.b-card h3 {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.b-card p {
    font-weight: bold;
}

.tag {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--primary-color);
    color: #08080a;
    font-weight: 900;
    padding: 0.2rem 0.8rem;
    border: 2px solid #08080a;
    font-size: 0.9rem;
}

/* Simulator */
.simulator-box {
    background: #000;
    border: 2px solid var(--border-color);
    padding: 2rem;
    color: #00f0ff;
    box-shadow: 8px 8px 0px var(--shadow-color);
}

.simulator-header {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed #00f0ff;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    font-weight: bold;
}

.slider-container {
    margin-bottom: 2rem;
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 30px;
    width: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid #08080a;
    margin-top: -12px;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #333;
    border: 1px solid #00f0ff;
}

.sim-stats {
    display: flex;
    justify-content: space-between;
    font-size: 1.5rem;
    font-weight: 900;
}
.stat-value {
    color: var(--primary-color);
}

/* Nodes Matrix */
.node-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}
.node-box {
    border: 2px solid var(--border-color);
    padding: 1rem;
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 0.1s;
}
.node-box:hover {
    border-color: #facc15; /* Neon yellow hover */
}
.node-name {
    font-weight: 900;
    font-size: 1.2rem;
}
.node-ping {
    color: #10b981; /* Green */
    font-weight: bold;
}
[data-theme="dark"] .node-ping { color: #34d399; }
.node-bw {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* Pricing */
.price-val {
    font-size: 3rem;
    font-weight: 900;
    margin: 1rem 0;
}
.price-val span {
    font-size: 1.2rem;
}
.plan-features {
    list-style: none;
    margin: 1.5rem 0;
    font-weight: bold;
}
.plan-features li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}
.plan-features li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* FAQ */
.faq-item {
    border: 2px solid var(--border-color);
    margin-bottom: 1rem;
    padding: 1.5rem;
    background: var(--card-bg);
    box-shadow: 4px 4px 0px var(--shadow-color);
}
.faq-item h3 {
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* Reviews */
.review-box {
    border: 2px solid var(--border-color);
    padding: 1.5rem;
    background: var(--card-bg);
    box-shadow: 4px 4px 0px var(--shadow-color);
}
.review-stars {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 0 #000;
}

/* Footer */
footer {
    border-top: 4px solid var(--border-color);
    padding: 3rem 5%;
    background: var(--card-bg);
}
.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    font-weight: bold;
}
.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
    .nav-links {
        display: none; 
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .hero-actions {
        flex-direction: column;
    }
    .brutalist-btn {
        width: 100%;
        text-align: center;
    }
}