/* =========================
   Reset & Base
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background-color: #ffffff;
  color: #222;
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* =========================
   Colors
========================= */
:root {
  --green: #00a66c;      /* Playeverメインカラー：緑 */
  --green-dark: #008a59;
  --black: #111;
  --white: #fff;
  --gray-bg: #f5f5f5;
}

/* =========================
   Header
========================= */
.site-header {
  width: 100%;
  background: var(--white);
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.logo a {
  font-size: 22px;
  font-weight: bold;
  color: var(--green);
  text-decoration: none;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
  color: var(--black);
  transition: 0.2s;
}

.site-nav a:hover {
  color: var(--green);
}

/* =========================
   Hero Section
========================= */
.hero {
  background: var(--gray-bg);
  padding: 80px 0;
}

.hero-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 40px;
}

.hero-text {
  flex: 1 1 450px;
}

.hero-tagline {
  font-size: 16px;
  color: var(--green);
  font-weight: bold;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 34px;
  margin-bottom: 18px;
}

.hero-description {
  font-size: 16px;
  margin-bottom: 26px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn-primary,
.btn-outline {
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: bold;
  text-decoration: none;
  transition: 0.25s;
}

.btn-primary {
  background: var(--green);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--green-dark);
}

.btn-outline {
  border: 2px solid var(--green);
  color: var(--green);
}

.btn-outline:hover {
  background: var(--green);
  color: var(--white);
}

.hero-visual {
  flex: 1 1 350px;
}

.hero-placeholder {
  width: 100%;
  height: 260px;
  background: var(--green);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--white);
  font-size: 28px;
  font-weight: bold;
}

/* =========================
   Sections
========================= */
.section {
  padding: 80px 0;
}

.section-alt {
  padding: 80px 0;
  background: var(--gray-bg);
}

.section-title {
  font-size: 28px;
  margin-bottom: 20px;
  text-align: center;
  color: var(--black);
}

.section-lead {
  max-width: 750px;
  text-align: center;
  margin: 0 auto 50px;
  color: #444;
  line-height: 1.8;
}

/* =========================
   About
========================= */
.about-grid {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.about-item h3 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--green);
}

.about-item p {
  color: #444;
}

.section-thumb {
  width: 100%;
  display: flex;           /* 中央揃え用 */
  justify-content: center; /* 水平中央揃え */
  margin-bottom: 20px;
}

.section-thumb img {
  width: 90%;
  aspect-ratio: 16 / 9;    /* 縦横比を固定 */
  object-fit: cover;       /* トリミングして綺麗に収める */
  border-radius: 8px;
}

/* =========================
   Projects
========================= */
.cards {
  display: grid;
  gap: 30px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--white);
  padding: 24px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--green);
}

/* =========================
   Vision
========================= */
.vision-box {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  border-left: 6px solid var(--green);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

.vision-box p {
  margin-bottom: 14px;
}

/* =========================
   Contact
========================= */
.contact-list {
  text-align: center;
  font-size: 18px;
}

.contact-list p {
  margin-bottom: 10px;
}

/* =========================
   Footer
========================= */
.site-footer {
  background: var(--black);
  color: var(--white);
  padding: 30px 0;
  text-align: center;
}

.footer-copy {
  font-size: 16px;
}

.footer-note {
  font-size: 12px;
  opacity: 0.6;
  margin-top: 6px;
}

/* =========================
   Responsive
========================= */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 24px;
  }

  .hero-placeholder {
    height: 200px;
  }
}