:root {
  --bg: #FAF9F6;
  --ink: #1A1A2E;
  --ink-soft: #5A5A72;
  --accent: #6C5CE7;
  --accent-soft: #E8E6FF;
  --border: #E4E1DA;
  --error: #E5484D;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Noto Sans JP', sans-serif; background: var(--bg); color: var(--ink); line-height: 1.8; }
h1, h2 { font-family: 'Zen Kaku Gothic New', sans-serif; font-weight: 700; letter-spacing: 0.02em; }
a { color: var(--accent); text-decoration: none; }
.wrap { max-width: 480px; margin: 0 auto; padding: 0 1.5rem; }

header { background: rgba(250,249,246,0.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); position: sticky; top: 0; }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; max-width: 480px; margin: 0 auto; padding-left: 1.5rem; padding-right: 1.5rem; }
.logo { font-family: 'Zen Kaku Gothic New', sans-serif; font-weight: 700; font-size: 1.15rem; display: flex; align-items: center; gap: 8px; color: var(--ink); }
.logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.back-link { font-size: 13px; color: var(--ink-soft); }
.back-link:hover { color: var(--accent); }

main { padding: 3rem 0 4rem; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; color: var(--accent); font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 1rem; }
.eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
h1 { font-size: clamp(1.6rem, 4vw, 2rem); margin-bottom: 0.5rem; }
.lead { font-size: 14px; color: var(--ink-soft); margin-bottom: 2rem; }

.card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 1.75rem; }

.plan-banner { background: var(--accent-soft); border-radius: 12px; padding: 0.85rem 1rem; font-size: 13px; color: var(--ink); margin-bottom: 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.plan-banner strong { color: var(--accent); }
.plan-banner a { font-size: 12px; flex-shrink: 0; }

.field { margin-bottom: 1.1rem; }
.field label { display: block; font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 0.4rem; }
.field .req { color: var(--accent); font-weight: 700; margin-left: 2px; }
.field input { width: 100%; font-family: inherit; font-size: 14px; padding: 0.75rem 0.9rem; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--ink); transition: border-color 0.2s; }
.field input:focus { outline: none; border-color: var(--accent); background: #fff; }
.field .hint { font-size: 12px; color: var(--ink-soft); margin-top: 0.35rem; }
.field .error-msg { font-size: 12px; color: var(--error); margin-top: 0.35rem; display: none; }
.field.has-error input { border-color: var(--error); }
.field.has-error .error-msg { display: block; }

.checkbox-field { display: flex; align-items: flex-start; gap: 0.6rem; margin-bottom: 1.5rem; }
.checkbox-field input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--accent); flex-shrink: 0; }
.checkbox-field label { font-size: 13px; color: var(--ink-soft); line-height: 1.7; }

.btn-primary { width: 100%; background: var(--accent); color: #fff; border: none; border-radius: 999px; padding: 0.9rem 2rem; font-size: 15px; font-weight: 500; cursor: pointer; font-family: inherit; transition: opacity 0.2s; }
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.divider { text-align: center; font-size: 12px; color: var(--ink-soft); margin: 1.5rem 0; position: relative; }
.divider::before, .divider::after { content: ''; position: absolute; top: 50%; width: 40%; height: 1px; background: var(--border); }
.divider::before { left: 0; }
.divider::after { right: 0; }

.login-link { text-align: center; font-size: 13px; color: var(--ink-soft); margin-top: 1.5rem; }

.form-message { font-size: 13px; padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 1.25rem; display: none; }
.form-message.show { display: block; }
.form-message.success { background: #E8F5E9; color: #2E7D32; }
.form-message.error { background: #FDECEC; color: var(--error); }

footer { border-top: 1px solid var(--border); padding: 2rem 0; margin-top: 1.5rem; }
.footer-inner { display: flex; flex-direction: column; gap: 0.75rem; align-items: center; font-size: 13px; color: var(--ink-soft); text-align: center; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a:hover { color: var(--accent); }