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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background-color: #eef5ff;
  color: #0d2040;
  line-height: 1.7;
  font-size: 16px;
}

/* ===========================
   Header
=========================== */
header {
  background: linear-gradient(135deg, #1e6edb 0%, #0ea5e9 100%);
  border-bottom: none;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-title {
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
  color: #fff;
  -webkit-text-fill-color: #fff;
  background: none;
}

/* ===========================
   Language Toggle
=========================== */
.lang-toggle {
  display: flex;
  gap: 8px;
}

.lang-btn {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.lang-btn.active {
  background: #fff;
  color: #1e6edb;
  border-color: #fff;
}

/* ===========================
   Hero
=========================== */
.hero {
  text-align: center;
  padding: 48px 24px 32px;
  background: linear-gradient(180deg, #d0e8ff 0%, #eef5ff 100%);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: #1e6edb;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}

/* ===========================
   Sections
=========================== */
.section {
  max-width: 760px;
  margin: 0 auto 48px;
  padding: 0 24px;
}

.section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #1a4a8a;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 1.5px solid #b8d4f0;
}

/* ===========================
   FAQ
=========================== */
.faq-item {
  background: #fff;
  border: 1px solid #b8d4f0;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item:hover {
  border-color: #1e6edb;
  box-shadow: 0 4px 16px rgba(30, 110, 219, 0.1);
}

.faq-question {
  font-weight: 700;
  color: #1a4a8a;
  margin-bottom: 10px;
  font-size: 0.98rem;
}

.faq-question::before {
  content: "Q. ";
  color: #1e6edb;
}

.faq-answer {
  color: #2a4a6a;
  font-size: 0.93rem;
  padding-left: 20px;
  border-left: 2px solid #1e6edb;
}

/* ===========================
   Contact
=========================== */
.contact-section {
  background: linear-gradient(135deg, #d0e8ff, #bfe0ff);
  border: 1px solid #90c4f0;
  border-radius: 16px;
  padding: 32px 32px;
  text-align: center;
}

.contact-section h2 {
  border-bottom-color: #90c4f0;
}

.contact-section p {
  color: #2a5a8a;
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.contact-email {
  display: inline-block;
  background: linear-gradient(135deg, #1e6edb, #0ea5e9);
  color: #fff;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 28px;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  transition: opacity 0.2s, transform 0.1s;
}

.contact-email:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.contact-note {
  font-size: 0.82rem;
  color: #4a7aaa;
  text-align: left;
  margin-top: 12px;
}

/* ===========================
   Footer
=========================== */
footer {
  text-align: center;
  padding: 32px 24px;
  color: #7a9ab8;
  font-size: 0.82rem;
  border-top: 1px solid #c8dff5;
  margin-top: 16px;
  background-color: #f5faff;
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 480px) {
  .header-inner {
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
  }

  .contact-section {
    padding: 24px 20px;
  }

  .faq-item {
    padding: 16px 18px;
  }
}