:root { --bg: #f3f3ef; --card: #fff; --ink: #17171c; --muted: #6c6c76; --line: #e3e3dc; --primary: #2d5bff; --error: #c62a4b; --error-bg: #ffecf0; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: 'Noto Sans JP', system-ui, sans-serif; }
.wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.panel { width: 100%; max-width: 460px; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 40px 32px; text-align: center; box-shadow: 0 12px 40px rgba(0,0,0,0.06); }
.logo { width: 240px; max-width: 80%; height: auto; display: block; margin: 0 auto 24px; }
h1 { font-size: 26px; font-weight: 900; margin: 0 0 10px; }
.lead { color: var(--muted); line-height: 1.7; margin: 0 0 28px; font-size: 15px; }
.google { display: flex; align-items: center; justify-content: center; width: 100%; padding: 14px 18px; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 700; font-size: 16px; text-decoration: none; transition: filter .15s; }
.google:hover { filter: brightness(1.08); }
.google:focus-visible { outline: 3px solid #2d5bff66; outline-offset: 2px; }
.sub { font-size: 13px; color: var(--muted); line-height: 1.7; margin: 12px 0 24px; }
.plans { list-style: none; padding: 16px; margin: 0 0 16px; background: var(--bg); border-radius: 12px; text-align: left; font-size: 14px; line-height: 2; }
.tag { display: inline-block; min-width: 78px; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: #fff3e3; color: #b85c00; margin-right: 8px; text-align: center; }
.tag.paid { background: #e8f7ee; color: #17803d; }
.fine { font-size: 12px; color: var(--muted); margin: 0; }
.msg { background: var(--error-bg); color: var(--error); border-radius: 10px; padding: 12px 14px; font-size: 14px; line-height: 1.6; margin-bottom: 18px; text-align: left; }
@media (max-width: 480px) { .panel { padding: 32px 20px; } h1 { font-size: 22px; } }

/* ── v38：メールでのログイン・会員登録 ── */
.panel h1 { margin-bottom: 8px; }
.or { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12px; margin: 22px 0 16px; }
.or::before, .or::after { content: ''; flex: 1; height: 1px; background: var(--line); }
.form { display: grid; gap: 14px; text-align: left; }
.form label { display: grid; gap: 6px; font-size: 13px; font-weight: 700; }
.form input { font: inherit; font-weight: 400; font-size: 15px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fcfcfa; color: inherit; width: 100%; }
.form input:focus { outline: 2px solid #2d5bff55; border-color: var(--primary); }
.form small { font-weight: 400; color: var(--muted); font-size: 12px; }
.req, .opt { display: inline-block; margin-left: 8px; font-size: 11px; padding: 1px 6px; border-radius: 4px; vertical-align: 1px; }
.req { background: var(--error-bg); color: var(--error); }
.opt { background: var(--bg); color: var(--muted); }
.btn-main { font: inherit; font-weight: 700; font-size: 16px; padding: 13px; border-radius: 12px; border: none; background: var(--ink); color: #fff; cursor: pointer; margin-top: 4px; }
.btn-main:disabled { opacity: .5; cursor: default; }
.btn-sub { display: block; padding: 12px; border-radius: 12px; border: 1px solid var(--primary); color: var(--primary); font-weight: 700; text-decoration: none; background: #fff; }
.links { font-size: 13px; margin: 14px 0 0; }
.links a { color: var(--primary); }
.signup-box { margin-top: 24px; padding: 18px 16px; background: var(--bg); border-radius: 12px; font-size: 13px; }
.signup-box p { margin: 0 0 12px; line-height: 1.6; }
.signup-box .fine { margin: 10px 0 0; }
.msg.ok { background: #e8f7ee; color: #17803d; }
.done { text-align: left; background: #e8f7ee; border-radius: 12px; padding: 18px; line-height: 1.7; font-size: 14px; }
.done h2 { font-size: 17px; margin: 0 0 8px; color: #17803d; }
.done p { margin: 0 0 8px; }
.signup-box .free-note { font-weight: 700; color: #b85c00; background: #fff3e3; border-radius: 8px; padding: 6px 10px; }
.agree { display: flex !important; grid-template-columns: none; align-items: flex-start; gap: 8px; font-weight: 400 !important; font-size: 13px !important; line-height: 1.6; }
.agree input { width: 18px !important; height: 18px; margin: 2px 0 0; flex: 0 0 18px; accent-color: var(--primary); }
.agree a, .fine a { color: var(--primary); }
.legal { font-size: 12px; color: var(--muted); margin: 18px 0 0; }
.legal a { color: var(--muted); }
.form label:not(.agree) { display: block; }
.form label:not(.agree) input { display: block; margin-top: 6px; }
.form label small { display: block; margin-top: 4px; }