/*
Theme Name: Japan Drone Soccer Association Theme
Author: Web Designer
Description: 一般社団法人日本ドローンサッカー協会 公式テーマ。スポーツ団体向けの躍動感あるデザイン。
Version: 1.0
*/

:root {
    --primary-color: #001f3f; 
    --accent-color: #e60012;  
    --text-light: #ffffff;
    --bg-gray: #f4f4f4;
}

body {
    margin: 0;
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

header {
    background: var(--primary-color);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    margin: 0;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
}

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

.hero-video-container {
    position: relative;
    height: 70vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    z-index: 1;
    filter: brightness(0.5);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    margin: 0;
    text-shadow: 0 4px 10px rgba(0,0,0,0.7);
}

.message-section {
    padding: 60px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.announcement-box {
    border-left: 8px solid var(--accent-color);
    padding: 30px;
    background: var(--bg-gray);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.container {
    max-width: 1100px;
    margin: 60px auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 50px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-color);
}

.content-block {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 80px;
}

.content-block:nth-child(even) {
    flex-direction: row-reverse;
}

.image-area {
    flex: 1;
    background: #eee;
    height: 300px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-weight: bold;
    overflow: hidden;
}

.text-area {
    flex: 1;
}

.text-area h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-top: 0;
}

footer {
    background: #111;
    color: #ccc;
    padding: 60px 20px;
    text-align: center;
}

.line-button {
    display: inline-block;
    background: #06C755;
    color: white !important;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: transform 0.3s;
}

.line-button:hover {
    transform: scale(1.05);
}

.address-info {
    margin-top: 40px;
    border-top: 1px solid #333;
    padding-top: 40px;
    font-style: normal;
}