/* デザイン定数 */
:root {
    --main-black: #000000;
    --sub-black: #111111;
    --accent-yellow: #ffcc00; /* 注意を引くエマージェンシーイエロー */
    --text-white: #ffffff;
    --text-muted: #aaaaaa;
    --alert-red: #ff3333;
    --font-impact: 'Anton', 'archivo black', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
}

/* 基本リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--main-black);
    color: var(--text-white);
    font-family: var(--font-jp);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ヘッダー */
header {
    height: 80px;
    background-color: var(--main-black);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 2px solid var(--accent-yellow);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-impact);
    font-size: 1.8rem;
    letter-spacing: 1px;
}

.logo span {
    color: var(--accent-yellow);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    text-decoration: none;
    color: var(--text-white);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
}

nav a:hover {
    color: var(--accent-yellow);
}

/* ヒーローセクション */
.hero {
    position: relative;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.8), rgba(0,0,0,0.3));
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.alert-tag {
    font-family: var(--font-impact);
    color: var(--alert-red);
    letter-spacing: 2px;
    font-size: 1rem;
    display: block;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 30px;
    font-weight: 900;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

.btn-main {
    padding: 18px 45px;
    background-color: var(--accent-yellow);
    color: var(--main-black);
    text-decoration: none;
    font-weight: 900;
    font-size: 1rem;
    border-radius: 5px;
    box-shadow: 0 10px 0 #ccaa00;
    transition: 0.2s;
}

.btn-main:hover {
    transform: translateY(3px);
    box-shadow: 0 7px 0 #ccaa00;
}

/* 共通タイトル */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 20px;
}

.section-title {
    margin-bottom: 80px;
}

.section-title h2 {
    font-family: var(--font-impact);
    font-size: 3rem;
    line-height: 1;
    color: var(--accent-yellow);
    margin-bottom: 10px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1rem;
}

.text-center {
    text-align: center;
}

/* 脅威セクション */
.threat-section {
    background-color: var(--sub-black);
}

.threat-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.threat-item {
    display: flex;
    align-items: center;
    gap: 50px;
}

.threat-item.reverse {
    flex-direction: row-reverse;
}

.threat-img {
    flex: 1;
    overflow: hidden;
    border: 5px solid var(--accent-yellow);
}

.threat-img img {
    width: 100%;
    display: block;
    object-fit: cover;
    height: 350px;
    transition: 0.5s;
}

.threat-img img:hover {
    transform: scale(1.1) rotate(2deg);
}

.threat-text {
    flex: 1;
}

.threat-text h3 {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--accent-yellow);
}

.threat-text p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* 対策セクション */
.action-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.action-card {
    background-color: var(--sub-black);
    padding: 50px;
    border: 2px solid var(--accent-yellow);
    position: relative;
    border-radius: 10px;
}

.action-icon {
    font-family: var(--font-impact);
    font-size: 3rem;
    color: var(--sub-black);
    background-color: var(--accent-yellow);
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -35px;
    left: 40px;
    border-radius: 5px;
}

.action-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 20px 0 20px;
    color: var(--accent-yellow);
}

/* フッター */
footer {
    padding: 80px 20px;
    text-align: center;
    background-color: var(--sub-black);
    border-top: 2px solid var(--accent-yellow);
}

footer p {
    font-size: 1.1rem;
    color: var(--accent-yellow);
    font-weight: 700;
    margin-bottom: 15px;
}

.copyright {
    color: var(--text-muted) !important;
    font-size: 0.8rem !important;
}

/* レスポンシブ */
@media (max-width: 900px) {
    .header-inner nav ul {
        display: none;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .threat-item, .threat-item.reverse {
        flex-direction: column;
        gap: 30px;
    }
    .action-list {
        grid-template-columns: 1fr;
        gap: 60px;
        margin-top: 50px;
    }
}