/* 認証と認可。style.css と flow.css の上に重ねる（○ は緑・✕ は赤、JWT はヘッダー橙・中身青・署名緑、AI は紫） */
:root {
  --au-ok: #15803d;
  --au-ok-soft: #ecfdf5;
  --au-ng: #b91c1c;
  --au-ng-soft: #fef2f2;
  --au-h: #b45309;
  --au-p: #1d4ed8;
  --au-s: #047857;
  --au-ai: #6d28d9;
  --au-ai-soft: #ede9fe;
  --au-code: #0f172a;
  --au-now: #2563eb;
}
.subh { margin: 22px 0 10px; font-size: 15px; }
.hint { display: inline-block; font-size: 11px; font-weight: 700; line-height: 1.5; color: #475569; background: #f8fafc; border: 1px dashed #94a3b8; border-radius: 999px; padding: 0 8px; white-space: nowrap; vertical-align: middle; margin-left: 6px; }
.sref { margin: 6px 0 0; font-size: 11.5px; color: var(--muted); }
.sref a, .jl a, .fhead p a, .analogy a, .cnote a { color: #1d4ed8; text-underline-offset: 2px; }
.jl { margin: 0; font-size: 12.5px; }
.inl { font-weight: 700; }
.cnote { margin: 0 0 8px; font-size: 12.5px; color: var(--ink2); }
.code + .cnote { margin: 8px 0 0; }
.jlcol { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.fhead code, .cnote code { font-family: var(--latin); font-size: 12px; background: var(--line2); border-radius: 5px; padding: 1px 5px; }
.code { margin: 0; font-family: var(--latin); font-size: 12px; line-height: 1.6; background: var(--au-code); color: #e2e8f0; border-radius: 10px; padding: 9px 12px; white-space: pre-wrap; overflow-wrap: anywhere; }
.code code { font: inherit; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; min-width: 0; }
.card h3 { margin: 0 0 8px; font-size: 15px; }
.seg { display: flex; flex-wrap: wrap; gap: 5px; }
.seg button { appearance: none; font: inherit; font-size: 12.5px; font-weight: 700; border: 1px solid var(--line); background: var(--paper); color: var(--ink2); border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.seg button:hover { border-color: #94a3b8; color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.ghost, .sqctrl button, .ckreset { appearance: none; font: inherit; font-size: 12.5px; font-weight: 700; border: 1px solid var(--line); background: var(--paper); color: var(--ink2); border-radius: 999px; padding: 6px 14px; cursor: pointer; }
.ghost:hover, .ckreset:hover { border-color: #94a3b8; color: var(--ink); }
.aitag { display: inline-block; font-size: 11px; font-weight: 700; color: var(--au-ai); background: var(--au-ai-soft); border-radius: 6px; padding: 1px 7px; margin-right: 6px; vertical-align: middle; }
.aitag.big { font-size: 12px; padding: 2px 8px; }

/* ① 認証と認可 */
.dfgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.dfcard { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; }
.dfh { display: flex; align-items: baseline; gap: 10px; }
.dfh b { font-size: 20px; }
.dfh .en { font-family: var(--latin); font-size: 12px; color: var(--muted); }
.dfq { margin: 0; font-size: 16px; font-weight: 700; color: var(--au-p); }
.dfc-authz .dfq { color: var(--au-s); }
.dfcard p { margin: 0; font-size: 13.5px; color: var(--ink2); }
.dfcard ul { margin: 2px 0 0; padding-left: 1.2em; font-size: 13px; color: var(--ink2); }
.dffail { margin-top: auto !important; padding-top: 6px; display: flex; gap: 10px; align-items: center; }
.dffail a { text-decoration: none; }
.dffail code { font-family: var(--latin); font-size: 15px; font-weight: 600; color: #fff; background: var(--ink2); border-radius: 8px; padding: 2px 10px; }
.dffail span { font-size: 12.5px; }
.analogy { margin: 10px 0 0; font-size: 13px; color: var(--ink2); }

/* ② パスワードの保存 */
.pwlayout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 12px; align-items: start; }
.stlist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.st { display: flex; gap: 12px; align-items: flex-start; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
.st.ok { border-color: #86efac; background: #f7fef9; }
.stm { flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 14px; background: var(--au-ng); }
.st.ok .stm { background: var(--au-ok); }
.st b { font-size: 14px; }
.st p { margin: 2px 0 4px; font-size: 12.5px; color: var(--ink2); }
.st code { font-family: var(--latin); font-size: 11.5px; color: var(--muted); }
.stnote { margin: 8px 0 0; font-size: 12.5px; color: var(--ink2); background: var(--line2); border-radius: 10px; padding: 8px 12px; }
.saltlab { display: flex; align-items: center; gap: 10px; margin: 4px 0 10px; font-size: 13px; font-weight: 700; }
.saltlab input { flex: 1; min-width: 0; font: inherit; font-family: var(--latin); font-size: 16px; border: 1px solid var(--line); border-radius: 10px; padding: 7px 10px; }
.salttbl { width: 100%; border-collapse: collapse; font-size: 12px; table-layout: fixed; }
.salttbl th, .salttbl td { text-align: left; padding: 6px 6px; border-bottom: 1px solid var(--line2); vertical-align: top; }
.salttbl thead th { font-size: 11.5px; color: var(--muted); }
.salttbl tbody th { width: 5.5em; font-weight: 700; }
.salttbl code { display: block; font-family: var(--latin); font-size: 11.5px; overflow-wrap: anywhere; }
.salttbl code.salt { color: var(--au-h); }
.saltmsg { margin: 8px 0 10px; font-size: 12.5px; color: var(--ink2); }

/* ③ セッションとトークン */
.kdgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.kdcard { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.kdcard h3 { margin: 0; font-size: 16px; }
.kdcard dl { margin: 0; display: flex; flex-direction: column; gap: 6px; }
.kdcard dl div { display: grid; grid-template-columns: 4.5em minmax(0, 1fr); gap: 8px; font-size: 12.5px; }
.kdcard dt { font-weight: 700; color: var(--muted); }
.kdcard dd { margin: 0; color: var(--ink2); }
.kdcard .inl { font-size: 13px; color: #1d4ed8; }

/* ④ JWT */
.jwtbox { display: flex; flex-direction: column; gap: 10px; }
.jlab { margin: 4px 0 0; font-size: 12px; font-weight: 700; color: var(--muted); }
.jtok { margin: 0; font-family: var(--latin); font-size: 13px; line-height: 1.6; background: var(--au-code); border-radius: 10px; padding: 10px 12px; overflow-wrap: anywhere; word-break: break-all; }
.jtok .jh { color: #fbbf24; }
.jtok .jp { color: #93c5fd; }
.jtok .js { color: #6ee7b7; }
.jtok .jdot { color: #e2e8f0; }
.jparts { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr) minmax(0, 1fr); gap: 10px; }
.jpart { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.jpart > b { align-self: flex-start; font-size: 12.5px; border-radius: 6px; padding: 1px 8px; }
.jh-b > b { background: #fef3c7; color: var(--au-h); }
.jp-b > b { background: #dbeafe; color: var(--au-p); }
.js-b > b { background: #d1fae5; color: var(--au-s); }
.jpart pre { margin: 0; font-family: var(--latin); font-size: 12px; line-height: 1.55; background: var(--line2); border-radius: 8px; padding: 7px 9px; white-space: pre-wrap; overflow-wrap: anywhere; }
.jpart p { margin: 0; font-size: 12px; color: var(--ink2); }
.jpart p .jh { color: var(--au-h); font-weight: 700; }
.jpart p .jp { color: var(--au-p); font-weight: 700; }
.jsv { font-family: var(--latin); font-size: 11.5px; overflow-wrap: anywhere; color: var(--au-s); }
.jsnone { color: var(--au-ng) !important; font-weight: 700; }
.jexp { font-size: 11.5px; color: var(--muted); margin-top: auto; }
.jclaims { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--ink2); }
.jclaims li { display: grid; grid-template-columns: 3.4em minmax(0, 1fr); gap: 6px; }
.jclaims code { font-family: var(--latin); font-weight: 600; color: var(--au-p); }
.jverdict { border-radius: 12px; padding: 10px 14px; border: 1px solid; display: flex; flex-direction: column; gap: 3px; }
.jverdict.ok { background: var(--au-ok-soft); border-color: #a7f3d0; }
.jverdict.ng { background: var(--au-ng-soft); border-color: #fecaca; }
.jverdict b { font-size: 15px; }
.jverdict.ok b { color: var(--au-ok); }
.jverdict.ng b { color: var(--au-ng); }
.jverdict p { margin: 0; font-size: 13px; color: var(--ink2); }
.jverdict code { font-family: var(--latin); font-size: 12px; }
.jverdict .jnow { font-size: 11.5px; color: var(--muted); }
.jread { margin: 0; font-size: 13px; color: var(--ink2); }

/* ⑤ Google でログイン */
.seqlayout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; align-items: start; }
.seqbox { padding: 12px 12px 10px; }
.seqbox:focus-visible { outline: 3px solid #2563eb; outline-offset: 2px; }
.sqhead { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); text-align: center; margin-bottom: 4px; }
.sqlane b { display: block; font-size: 13px; }
.sqlane span { display: block; font-size: 10.5px; color: var(--muted); line-height: 1.3; }
.sqbody { position: relative; }
.sqlines i { position: absolute; top: 0; bottom: 0; width: 2px; margin-left: -1px; background: #e2e8f0; border-radius: 2px; }
.sqrows { list-style: none; margin: 0; padding: 0; position: relative; }
.sqrow { --c: #cbd5e1; display: block; position: relative; width: 100%; height: 34px; appearance: none; border: 0; background: transparent; color: var(--c); cursor: pointer; border-radius: 8px; padding: 0; }
.sqrow.past { --c: #64748b; }
.sqrow.now { --c: var(--au-now); background: rgba(37, 99, 235, .07); }
.sqrow:hover { background: rgba(15, 23, 42, .04); }
.sqrow:focus-visible { outline: 3px solid #2563eb; outline-offset: -2px; }
.sqarr { position: absolute; top: 50%; height: 2px; margin-top: -1px; background: currentColor; }
.sqarr::after { content: ''; position: absolute; top: -4px; border-top: 5px solid transparent; border-bottom: 5px solid transparent; }
.sqarr.r::after { right: -1px; border-left: 8px solid currentColor; }
.sqarr.l::after { left: -1px; border-right: 8px solid currentColor; }
.sqloop { position: absolute; top: 6px; height: 22px; width: 8%; border: 2px solid currentColor; border-left: 0; border-radius: 0 11px 11px 0; }
.sqnum { position: absolute; top: 50%; transform: translate(-50%, -50%); width: 22px; height: 22px; border-radius: 50%; background: var(--c); color: #fff; font-family: var(--latin); font-size: 11px; font-weight: 600; line-height: 22px; text-align: center; }
.sqctrl { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 8px; }
.sqctrl #seqNext { background: var(--ink); border-color: var(--ink); color: #fff; }
.sqctrl button:disabled { opacity: .4; cursor: default; }
.sqcount { font-family: var(--latin); font-size: 13px; font-weight: 600; color: var(--ink2); }
.sqdetail { display: flex; flex-direction: column; gap: 8px; }
.sqdetail p { margin: 0; font-size: 13.5px; color: var(--ink2); }
.sqdh { display: flex; gap: 12px; align-items: center; }
.sqbig { flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--au-now); color: #fff; font-family: var(--latin); font-size: 16px; font-weight: 600; display: grid; place-items: center; }
.sqwho { display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--au-now); background: #eff6ff; border-radius: 6px; padding: 1px 8px; }
.sqdh h3 { margin: 3px 0 0; font-size: 16px; }
.sqlab { font-size: 11.5px !important; font-weight: 700; color: var(--muted) !important; }
.sqwhy { background: var(--au-ok-soft); border-radius: 10px; padding: 8px 12px; }
.sqwhy b { display: inline-block; font-size: 11.5px; color: #fff; background: var(--au-ok); border-radius: 6px; padding: 0 7px; margin-right: 8px; }

/* ⑥ 多要素認証とパスキー */
.fcts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-bottom: 10px; }
.fct { background: var(--paper); border: 1px dashed #cbd5e1; border-radius: 12px; padding: 8px 12px; display: flex; flex-direction: column; }
.fct b { font-size: 14px; }
.fct span { font-size: 12px; color: var(--muted); }
.mfgrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.mfcard { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 13px 15px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.mfcard.strong { border-color: #86efac; background: #f7fef9; }
.mfcard h3 { margin: 0; font-size: 15px; }
.mfcard p { margin: 0; font-size: 12.5px; color: var(--ink2); }
.mfcard .sref { margin-top: auto; }
.phb { align-self: flex-start; font-size: 11px; font-weight: 700; border-radius: 6px; padding: 1px 8px; }
.phb.ok { background: var(--au-ok); color: #fff; }
.phb.ng { background: var(--au-ng-soft); color: var(--au-ng); }
.phbox { margin-top: 10px; }
.phctrl { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 10px; }
.phurl { margin: 0 0 8px; font-family: var(--latin); font-size: 13px; border-radius: 999px; padding: 6px 14px; background: #f1f5f9; display: flex; gap: 8px; align-items: center; overflow-wrap: anywhere; }
.phurl.real { color: var(--au-ok); }
.phurl.fake { color: var(--au-ng); border: 1.5px dashed #fca5a5; }
.phout { margin: 0; border-radius: 12px; padding: 10px 14px; display: flex; flex-direction: column; gap: 2px; font-size: 13px; }
.phout.ok { background: var(--au-ok-soft); }
.phout.ng { background: var(--au-ng-soft); }
.phout b { font-size: 15px; }
.phout.ok b { color: var(--au-ok); }
.phout.ng b { color: var(--au-ng); }
.lvmfa { margin-top: 10px; }
.lvmfa p { margin: 0; font-size: 13px; color: var(--ink2); }

/* ⑦ 認可の形 */
.mdgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.mdcard { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 13px 15px; display: flex; flex-direction: column; gap: 6px; }
.mdcard h3 { margin: 0; font-size: 15px; }
.mdcard p { margin: 0; font-size: 12.5px; color: var(--ink2); }
.mdex { margin-top: auto !important; background: var(--line2); border-radius: 8px; padding: 5px 9px; }
.prins { list-style: none; margin: 10px 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.prins li { display: flex; flex-direction: column; gap: 2px; border: 1px dashed #cbd5e1; border-radius: 12px; padding: 8px 12px; font-size: 12.5px; color: var(--ink2); }
.prins b { font-size: 14px; color: var(--ink); }
.azlayout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 12px; align-items: start; }
.aztblwrap { overflow-x: auto; }
.aztbl { width: 100%; border-collapse: separate; border-spacing: 4px; table-layout: fixed; font-size: 12px; }
.aztbl thead th { font-weight: 700; color: var(--ink2); text-align: center; vertical-align: bottom; line-height: 1.35; padding: 0 2px 2px; }
.aztbl thead th:first-child { width: 6.2em; }
.aztbl tbody th { text-align: left; font-size: 12.5px; line-height: 1.3; }
.aztbl tbody th small { display: block; font-size: 10.5px; font-weight: 400; color: var(--muted); }
.az { appearance: none; width: 100%; height: 34px; border: 1px solid transparent; border-radius: 8px; font: inherit; font-size: 15px; font-weight: 700; cursor: pointer; }
.az.ok { background: var(--au-ok-soft); color: var(--au-ok); }
.az.ng { background: var(--au-ng-soft); color: var(--au-ng); }
.az[aria-pressed="true"] { border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }
.azwhy { margin: 8px 0 0; border-radius: 10px; padding: 8px 12px; display: flex; flex-direction: column; gap: 2px; font-size: 13px; color: var(--ink2); }
.azwhy.ok { background: var(--au-ok-soft); }
.azwhy.ng { background: var(--au-ng-soft); }
.azwhy b { color: var(--ink); }

/* ⑧ よくある穴 */
.hlgrid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.hlcard { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 13px 15px; display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.hlcard h3 { margin: 0; font-size: 14.5px; }
.hlcard p { margin: 0; font-size: 12.5px; color: var(--ink2); }
.hlcard p b { display: inline-block; font-size: 11px; border-radius: 6px; padding: 0 6px; margin-right: 6px; }
.hlrisk b { background: var(--au-ng-soft); color: var(--au-ng); }
.hlfix b { background: var(--au-ok-soft); color: var(--au-ok); }
.hlcard .sref { margin-top: auto; }

/* ⑨ AI 時代 */
.aigrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.aicard { background: #faf8ff; border: 1px solid #ddd6fe; border-radius: 14px; padding: 13px 15px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.aicard h3 { margin: 0; font-size: 14.5px; }
.aicard p { margin: 0; font-size: 12.5px; color: var(--ink2); }
.aicard .sref { margin-top: auto; }

/* ⑩ チェックリスト */
.mlist { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 16px; }
.mlist label { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; cursor: pointer; }
.mlist input { flex: none; width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--au-ok); }
.mlist input:checked + span { color: var(--muted); text-decoration: line-through; }
.ckfoot { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.mcount { font-size: 12.5px; color: var(--ink2); }

.seg button:focus-visible, .ghost:focus-visible, .sqctrl button:focus-visible, .ckreset:focus-visible, .az:focus-visible, .mlist input:focus-visible, .saltlab input:focus-visible, .dffail a:focus-visible { outline: 3px solid #2563eb; outline-offset: 2px; }

@media (max-width: 1100px) {
  .kdgrid, .aigrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mfgrid, .hlgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .jparts { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .jparts .jp-b { grid-column: 1 / -1; grid-row: 1; }
  .seqlayout, .azlayout, .pwlayout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .dfgrid, .kdgrid, .aigrid, .mfgrid, .hlgrid, .mdgrid, .prins, .fcts, .mlist { grid-template-columns: minmax(0, 1fr); }
  .jparts { grid-template-columns: minmax(0, 1fr); }
  .jparts .jp-b { grid-row: auto; }
  .sqlane b { font-size: 12px; }
  .sqlane span { display: none; }
  .aztbl { font-size: 11px; border-spacing: 3px; }
  .aztbl thead th:first-child { width: 4.8em; }
  .salttbl tbody th { width: 4.5em; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}