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

:root {
    --bg-1: #060b10;
    --bg-2: #101c2b;
    --accent-1: #00f5c4;
    --accent-2: #ff3d71;
    --accent-3: #ffd166;
    --text-main: #f7fbff;
    --text-soft: #b6d1dd;
    --panel: rgba(12, 21, 33, 0.7);
    --border: rgba(0, 245, 196, 0.45);
}

body {
    font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    color: var(--text-main);
    background:
        radial-gradient(circle at 15% 20%, rgba(0, 245, 196, 0.12), transparent 40%),
        radial-gradient(circle at 85% 30%, rgba(255, 61, 113, 0.14), transparent 35%),
        linear-gradient(135deg, var(--bg-1), var(--bg-2));
    min-height: 100vh;
}

.briefing-shell {
    width: min(1100px, 92vw);
    margin: 0 auto;
    padding: 28px 0 36px;
}

.hero {
    text-align: center;
    margin-bottom: 24px;
    padding: 22px 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--panel);
    backdrop-filter: blur(4px);
}

.eyebrow {
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent-3);
    font-weight: 700;
    margin-bottom: 8px;
}

.hero h1 {
    font-size: clamp(1.9rem, 5vw, 3rem);
    color: var(--accent-1);
    text-shadow: 0 0 12px rgba(0, 245, 196, 0.35);
    margin-bottom: 10px;
}

.lead {
    max-width: 880px;
    margin: 0 auto;
    line-height: 1.55;
    color: var(--text-soft);
    margin-bottom: 18px;
}

.back-btn {
    display: inline-block;
    border: 1px solid var(--accent-1);
    border-radius: 8px;
    padding: 10px 16px;
    text-decoration: none;
    color: var(--accent-1);
    font-weight: 700;
    transition: 0.2s ease;
}

.back-btn:hover {
    color: #00130e;
    background: var(--accent-1);
    box-shadow: 0 0 14px rgba(0, 245, 196, 0.4);
}

.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 14px;
}

.card {
    grid-column: span 6;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-left: 4px solid var(--accent-2);
    border-radius: 10px;
    padding: 16px;
    background: var(--panel);
}

.card.wide {
    grid-column: span 12;
    border-left-color: var(--accent-1);
}

.card h2 {
    color: var(--accent-3);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.card ul,
.card ol {
    padding-left: 18px;
    line-height: 1.6;
    color: var(--text-soft);
}

.footer-note {
    margin-top: 18px;
    padding: 14px;
    border-radius: 10px;
    border: 1px dashed rgba(255, 61, 113, 0.45);
    color: #ffd8e2;
    text-align: center;
    background: rgba(255, 61, 113, 0.08);
}

@media (max-width: 860px) {
    .card {
        grid-column: span 12;
    }
}