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

:root {
  --navy:     #173458;
  --navy-900: #0d2138;
  --navy-800: #11294a;
  --navy-700: #1f4374;
  --accent:   #e2612e;
  --ink:      #15212e;
  --ink-soft: #465569;
  --line:     #e2e6ec;
  --paper:    #ffffff;
  --paper-2:  #f4f6f9;
  --radius:   4px;
  --maxw:     1180px;
}

html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* HEADER */
.site-header {
  position: sticky; top: 0; z-index: 60;
  height: 74px;
  background: rgba(13,33,56,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  display: flex; align-items: center;
  padding: 0 40px;
}
.header-inner {
  width: 100%; max-width: var(--maxw);
  margin: 0 auto;
  display: flex; align-items: center;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 700; font-size: .95rem;
  color: #fff;
}
.logo-diamond {
  width: 16px; height: 16px;
  background: var(--accent);
  clip-path: polygon(50% 0%,100% 50%,50% 100%,0% 50%);
  flex-shrink: 0;
}
.header-back {
  margin-left: auto;
  font-size: .875rem; color: #dfe7f1;
  display: flex; align-items: center; gap: 6px;
  transition: color .2s;
}
.header-back:hover { color: #fff; }
.header-back::before { content: '←'; }

/* PAGE HEADER */
.page-head {
  background: var(--navy-900);
  background-image:
    radial-gradient(circle at 80% 50%, rgba(226,97,46,.18) 0%, transparent 55%),
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: cover, 48px 48px, 48px 48px;
  padding: 72px 40px 64px;
  text-align: center;
}
.page-head-label {
  font-family: "Anton", sans-serif; font-size: .72rem; letter-spacing: .18em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
}
.page-head h1 {
  font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 900;
  font-size: clamp(28px, 4vw, 44px); color: #fff; line-height: 1.25;
  margin-bottom: 14px;
}
.page-head p { color: #cdd8e6; font-size: .95rem; }

/* FORM SECTION */
.form-section {
  padding: 80px 40px 100px;
  background: var(--paper-2);
}
.form-wrap {
  max-width: 640px; margin: 0 auto;
}
.form-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 52px;
}

.form-group { margin-bottom: 28px; }

label {
  display: flex; align-items: center; gap: 8px;
  font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 700;
  font-size: .875rem; color: var(--ink);
  margin-bottom: 8px;
}
.req {
  font-size: .68rem; font-weight: 700; letter-spacing: .06em;
  background: var(--accent); color: #fff;
  border-radius: 3px; padding: 2px 6px;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  font-family: "Noto Sans JP", sans-serif; font-size: .9375rem;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, textarea:focus {
  border-color: var(--navy-700);
  box-shadow: 0 0 0 3px rgba(31,67,116,.12);
}
textarea { resize: vertical; min-height: 160px; line-height: 1.7; }

/* PRIVACY */
.privacy-box {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 20px;
  font-size: .8125rem; color: var(--ink-soft); line-height: 1.75;
  margin-bottom: 20px;
  background-color: #ffffff;
}
.privacy-box a { color: var(--navy-700); text-decoration: underline; }
.privacy-agree {
  display: flex; align-items: center; gap: 10px;
  font-size: .875rem; font-weight: 700; cursor: pointer;
  margin-bottom: 0;
}
input[type="checkbox"] {
  width: 18px; height: 18px; flex-shrink: 0;
  accent-color: var(--accent); cursor: pointer;
}

/* SUBMIT */
.form-submit { margin-top: 32px; text-align: center; }
button[type="submit"] {
  font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 700;
  font-size: 1rem; letter-spacing: .03em;
  background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius);
  padding: 16px 64px; cursor: pointer;
  box-shadow: 0 6px 18px -8px rgba(226,97,46,.8);
  transition: opacity .2s, transform .15s;
}
button[type="submit"]:hover { opacity: .88; transform: translateY(-1px); }
.submit-note {
  font-size: .78rem; color: var(--ink-soft); margin-top: 12px;
}

/* FOOTER */
.site-footer {
  background: #0a1b30; padding: 32px 40px;
  border-top: 1px solid rgba(255,255,255,.08);
  text-align: center;
}
.site-footer p { font-size: .78rem; color: #4a5c6e; }

@media (max-width: 640px) {
  .site-header { padding: 0 20px; }
  .page-head { padding: 52px 20px 44px; }
  .form-section { padding: 40px 20px 60px; }
  .form-card { padding: 28px 20px; }
}