/* ファイルパス: public/css/registration.css */
.registration-page{min-height:100vh;background:linear-gradient(180deg,#fff 0,#f8fafc 100%)}
.registration-header{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 28px;border-bottom:1px solid var(--border);background:#fff}
.registration-shell{width:min(980px,calc(100% - 32px));margin:0 auto;padding:44px 0 64px}
.registration-intro{max-width:760px;margin:0 auto 28px;text-align:center}
.registration-intro h1{margin:0;font-size:34px;line-height:1.25;letter-spacing:-.04em}
.registration-intro p{margin:12px auto 0;max-width:680px;color:var(--text-muted);font-size:15px;line-height:1.8}
.simple-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:28px auto 0;max-width:720px}
.simple-steps>div{display:grid;grid-template-columns:38px 1fr;column-gap:10px;align-items:center;text-align:left;padding:14px 16px;border:1px solid var(--border);border-radius:14px;background:#fff}
.simple-steps span{grid-row:1/3;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:850}
.simple-steps strong{font-size:14px}
.simple-steps small{color:var(--text-muted);font-size:12px;margin-top:2px}
.registration-card{max-width:820px;margin:0 auto;padding:28px;border:1px solid var(--border);border-radius:22px;background:#fff;box-shadow:var(--shadow-md);display:grid;gap:28px}
.registration-section{display:grid;gap:16px;padding-top:2px}
.registration-section h2{margin:0;padding-bottom:10px;border-bottom:1px solid var(--border);font-size:18px;letter-spacing:-.02em}
.registration-help{margin:-4px 0 0;color:var(--text-muted);font-size:13px;line-height:1.7}
.registration-grid{gap:18px}
.registration-control{min-height:48px;font-size:15px}
textarea.registration-control{min-height:120px}
.registration-consent{display:flex;align-items:flex-start;gap:10px;padding:14px 16px;border:1px solid var(--border);border-radius:13px;background:#fbfcff;font-size:14px;line-height:1.65}
.registration-consent input{width:18px;height:18px;margin-top:2px;accent-color:var(--primary);flex:0 0 auto}
.registration-submit{width:100%;min-height:52px;font-size:15px}
.registration-message{min-height:22px;font-size:14px;line-height:1.6;text-align:center}
.registration-message.success{padding:14px;border-radius:12px;background:var(--success-soft);color:#166534}
.registration-message.error{padding:14px;border-radius:12px;background:var(--danger-soft);color:#991b1b}
@media(max-width:720px){.registration-header{height:64px;padding:0 16px}.registration-shell{padding:28px 0 44px}.registration-intro h1{font-size:28px}.simple-steps{grid-template-columns:1fr}.registration-card{padding:20px;border-radius:18px;gap:24px}.registration-grid{grid-template-columns:1fr}}