:root {
    --tech-black: #0d0d0d;
    --tech-dark: #1a1a1a;
    --tech-orange: #ff9f43;
    --tech-cyan: #0abde3;
    --tech-grey: #576574;
    --tech-white: #f1f2f6;
}

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

body {
    background-color: var(--tech-black);
    color: var(--tech-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.performance-container {
    display: flex;
}

@media (max-width: 1024px) {
    .performance-container {
        flex-direction: column;
    }
}

.side-navigation {
    width: 80px;
    height: 100vh;
    background: var(--tech-dark);
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 2rem;
    border-right: 1px solid rgba(255,159,67,0.2);
}

@media (max-width: 1024px) {
    .side-navigation {
        width: 100%;
        height: auto;
        flex-direction: row;
        justify-content: space-around;
        padding: 1rem;
        position: fixed;
        bottom: 0;
        top: auto;
        z-index: 1000;
        border-right: none;
        border-top: 1px solid var(--tech-orange);
    }
}

.nav-node {
    margin-bottom: 2.5rem;
    color: var(--tech-grey);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: bold;
    text-transform: uppercase;
    transition: 0.3s;
    text-align: center;
}

.nav-node:hover {
    color: var(--tech-orange);
}

.main-interface {
    flex: 1;
}

.performance-hero {
    height: 80vh;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('../img/hero.png');
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 10%;
    border-bottom: 2px solid var(--tech-orange);
}

.performance-hero h1 {
    font-size: 4.5rem;
    color: var(--tech-orange);
    text-transform: uppercase;
    letter-spacing: -2px;
    line-height: 0.9;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .performance-hero h1 {
        font-size: 2.5rem;
    }
}

.hero-tagline {
    font-size: 1.5rem;
    max-width: 600px;
    margin-bottom: 3rem;
    color: #ccc;
}

.optimization-stream {
    padding: 8rem 10%;
    background: radial-gradient(circle at top right, #1a1a1a, #0d0d0d);
}

.stream-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 4rem;
}

.tuning-card {
    background: rgba(255,255,255,0.03);
    padding: 3rem;
    border: 1px solid rgba(255,255,255,0.05);
    position: relative;
    transition: 0.4s;
    overflow: hidden;
}

.tuning-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--tech-cyan);
}

.tuning-card:hover {
    background: rgba(255,255,255,0.07);
    transform: translateY(-10px);
    border-color: var(--tech-cyan);
}

.tuning-card h3 {
    font-size: 1.8rem;
    color: var(--tech-cyan);
    margin-bottom: 1.5rem;
}

.training-cadence {
    padding: 8rem 10%;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.module-row {
    margin-bottom: 6rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

@media (max-width: 900px) {
    .module-row {
        grid-template-columns: 1fr;
    }
    .module-row:nth-child(even) .module-info {
        order: 1;
    }
}

.module-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--tech-orange);
}

.knowledge-base {
    padding: 8rem 10%;
    background: var(--tech-dark);
}

.faq-item {
    margin-bottom: 1rem;
}

.faq-trigger {
    width: 100%;
    padding: 2rem;
    background: #222;
    border: none;
    color: white;
    text-align: left;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-content {
    padding: 0 2rem 2rem;
    background: #222;
    display: none;
    color: #aaa;
}

.faq-item.active .faq-content {
    display: block;
}

.acquisition-terminal {
    padding: 8rem 10%;
    display: flex;
    justify-content: center;
}

.terminal-interface {
    width: 100%;
    max-width: 800px;
    padding: 4rem;
    background: #000;
    border: 2px solid var(--tech-orange);
    box-shadow: 0 0 30px rgba(255,159,67,0.1);
}

.terminal-input {
    width: 100%;
    background: #111;
    border: 1px solid #333;
    padding: 1.2rem;
    color: var(--tech-orange);
    margin-bottom: 2rem;
    font-family: 'Courier New', monospace;
}

.terminal-input:focus {
    outline: none;
    border-color: var(--tech-orange);
}

.terminal-btn {
    background: var(--tech-orange);
    color: black;
    padding: 1.2rem 4rem;
    border: none;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.terminal-btn:hover {
    background: #e67e22;
}

.velocity-footer {
    padding: 6rem 10%;
    border-top: 1px solid #333;
    color: #666;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
}

.cookie-alert {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--tech-orange);
    color: black;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2000;
}

.cookie-alert button {
    background: black;
    color: white;
    border: none;
    padding: 0.5rem 1.5rem;
    cursor: pointer;
}