@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;600;700&family=Inter:wght@300;400;600&display=swap');

:root {
    --bg-void: #02040a;
    --bg-panel: #0a1124;
    --bg-darker: #050814;
    --accent-blue: #2d5af0;
    --accent-cyan: #00f0ff;
    --accent-orange: #ff6b2b;
    --text-main: #e6f0ff;
    --text-dim: #8b9bb4;
    --border-tech: 1px solid rgba(45, 90, 240, 0.3);
    --glow-blue: 0 0 20px rgba(45, 90, 240, 0.4);
    --font-ui: 'Chakra Petch', sans-serif;
    --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; scrollbar-width: thin; scrollbar-color: var(--accent-blue) var(--bg-void); }

body {
    margin: 0; padding: 0;
    background-color: var(--bg-void);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.7;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(45, 90, 240, 0.05) 0%, transparent 60%),
        repeating-linear-gradient(60deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 40px),
        repeating-linear-gradient(-60deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 40px);
    background-attachment: fixed;
}

a { text-decoration: none; color: var(--accent-cyan); transition: 0.3s; }
a:hover { color: var(--accent-orange); text-shadow: 0 0 10px var(--accent-orange); }

.app-container { display: flex; min-height: 100vh; }

/* SIDEBAR */
.sidebar {
    width: 280px;
    background: var(--bg-darker);
    border-right: var(--border-tech);
    padding: 40px 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 10px 0 30px rgba(0,0,0,0.5);
}
.brand {
    font-family: var(--font-ui); font-size: 1.8rem; font-weight: 700; color: #fff; text-transform: uppercase;
    margin-bottom: 60px; border-left: 5px solid var(--accent-orange); padding-left: 15px; letter-spacing: 1px;
}
.nav-menu { display: flex; flex-direction: column; gap: 15px; }
.nav-item {
    display: block; padding: 15px 20px; background: rgba(45, 90, 240, 0.05);
    border: 1px solid transparent; color: var(--text-dim);
    font-family: var(--font-ui); font-weight: 600; text-transform: uppercase; font-size: 0.9rem;
    clip-path: polygon(0 0, 100% 0, 100% 85%, 95% 100%, 0 100%); transition: 0.3s;
}
.nav-item:hover, .nav-item.active {
    background: rgba(45, 90, 240, 0.2); border-color: var(--accent-blue);
    color: #fff; padding-left: 30px; box-shadow: inset 5px 0 0 var(--accent-blue);
}

/* MAIN */
.main-content { flex: 1; margin-left: 280px; }
.container { max-width: 1000px; margin: 0 auto; padding: 60px 40px; }

/* HERO */
.hero-unit { text-align: left; padding: 80px 0; border-bottom: var(--border-tech); margin-bottom: 60px; }
.status-badge { display: inline-block; background: rgba(45, 240, 100, 0.1); color: #0f0; border: 1px solid #0f0; padding: 5px 15px; font-family: var(--font-ui); font-size: 0.8rem; margin-bottom: 20px; }
h1 {
    font-family: var(--font-ui); font-size: 4rem; line-height: 1; text-transform: uppercase; margin: 0 0 30px 0;
    background: linear-gradient(180deg, #fff, #8b9bb4); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 1.3rem; color: var(--text-dim); margin-bottom: 40px; max-width: 800px; }

/* BUTTON */
.btn-hazard {
    display: inline-block; background: var(--accent-orange); color: #000;
    font-family: var(--font-ui); font-weight: 700; font-size: 1.2rem; padding: 20px 50px;
    text-transform: uppercase; clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
    transition: 0.3s; box-shadow: 0 0 30px rgba(255, 107, 43, 0.3);
}
.btn-hazard:hover { background: #fff; box-shadow: 0 0 50px rgba(255, 107, 43, 0.6); transform: scale(1.05); }

/* CONTENT */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-bottom: 60px; }
.tech-card {
    background: var(--bg-panel); border: var(--border-tech); padding: 30px; position: relative; transition: 0.3s;
}
.tech-card:hover { transform: translateY(-5px); box-shadow: var(--glow-blue); }
.tech-card h3 { font-family: var(--font-ui); color: #fff; margin-top: 0; font-size: 1.5rem; }
.article-body { background: rgba(10, 17, 36, 0.7); border: 1px solid rgba(255,255,255,0.05); padding: 50px; margin-bottom: 60px; }
.article-body h2 { font-family: var(--font-ui); color: var(--accent-cyan); font-size: 2rem; margin-top: 50px; border-bottom: 1px dashed var(--text-dim); padding-bottom: 15px; }
.data-table { width: 100%; border-collapse: collapse; font-family: var(--font-ui); margin: 30px 0; }
.data-table th { text-align: left; padding: 20px; background: rgba(45, 90, 240, 0.1); color: var(--accent-cyan); border-bottom: 2px solid var(--accent-blue); }
.data-table td { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
details { background: var(--bg-panel); margin-bottom: 15px; border: 1px solid rgba(255,255,255,0.05); }
summary { padding: 20px; font-family: var(--font-ui); font-weight: 700; cursor: pointer; color: #fff; }
.ans { padding: 20px; border-top: 1px solid rgba(255,255,255,0.05); color: var(--text-dim); }
footer { border-top: var(--border-tech); padding: 60px 0; text-align: center; color: var(--text-dim); font-size: 0.9rem; background: var(--bg-darker); }
@media (max-width: 900px) { .sidebar { width: 100%; height: auto; position: relative; } .main-content { margin-left: 0; } }