/* ログイン・開通ページ（シェル無しの単独ページ） */
.sm-auth { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: 100vh; }
.sm-auth__form-side { display: flex; flex-direction: column; padding: 32px 48px; background: var(--surface); min-width: 0; }
.sm-auth__brand { display: flex; align-items: center; }
.sm-auth__logo { height: 28px; width: auto; }
.sm-auth__logo--dark { display: none; }
:root[data-theme="dark"] .sm-auth__logo--light { display: none; }
:root[data-theme="dark"] .sm-auth__logo--dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sm-auth__logo--light { display: none; }
  :root:not([data-theme="light"]) .sm-auth__logo--dark { display: block; }
}
.sm-auth__box { width: 100%; max-width: 400px; margin: auto; padding: 48px 0; }
.sm-auth__box--wide { max-width: 520px; }
.sm-input--lg { height: 44px; font-size: var(--fs-md); padding: 0 12px; }
.sm-auth__links { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; font-size: var(--fs-sm); }
.sm-auth__links a { display: inline-flex; gap: 4px; align-items: center; font-weight: 600; }
.sm-auth__demo { margin-top: 24px; padding: 14px 16px; border: 1px dashed var(--line-strong); border-radius: var(--r-3); background: var(--surface-2); }
.sm-auth__demo-list { display: flex; flex-direction: column; gap: 4px; margin-top: 10px; }
.sm-auth__demo-list button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--r-2); background: var(--surface); text-align: left; font-size: var(--fs-sm); }
.sm-auth__demo-list button:hover { border-color: var(--accent); }
.sm-auth__demo-list button span:last-child { margin-left: auto; color: var(--ink-3); font-family: var(--font-mono); font-size: 11px; }
.sm-auth__foot { display: flex; justify-content: space-between; align-items: center; color: var(--ink-3); font-size: var(--fs-xs); gap: 8px; flex-wrap: wrap; }
.sm-auth__theme { display: inline-flex; }

.sm-auth__visual { position: relative; background: var(--bg); border-left: 1px solid var(--line); display: flex; align-items: center; overflow: hidden; }
.sm-auth__visual-inner { padding: 64px; max-width: 560px; position: relative; z-index: 1; }
.sm-auth__visual.has-image { background-size: cover; background-position: center; }
.sm-auth__visual.has-image::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10, 20, 18, .35), rgba(10, 20, 18, .75)); }
.sm-auth__visual.has-image .sm-auth__quote, .sm-auth__visual.has-image .sm-auth__quote-sub, .sm-auth__visual.has-image .sm-auth__points li { color: #fff; }
.sm-auth__visual.has-image .sm-auth__art { display: none; }
.sm-auth__quote { font-size: 34px; line-height: 1.35; font-weight: 700; letter-spacing: .01em; }
.sm-auth__quote-sub { margin-top: 16px; color: var(--ink-2); font-size: var(--fs-md); line-height: 1.8; }
.sm-auth__points { margin-top: 36px; display: grid; gap: 14px; }
.sm-auth__points li { display: flex; gap: 14px; align-items: baseline; color: var(--ink); }
.sm-auth__points span { font-family: var(--font-num); font-size: var(--fs-xs); font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.sm-auth__art { margin-top: 40px; width: 100%; max-width: 400px; color: var(--accent); }

/* 開通ステップ */
.sm-steps { display: flex; gap: 0; margin-bottom: 32px; counter-reset: st; }
.sm-steps li { flex: 1 1 0; display: flex; flex-direction: column; gap: 8px; font-size: var(--fs-sm); color: var(--ink-3); position: relative; }
.sm-steps li::before { content: ""; height: 3px; border-radius: 2px; background: var(--line); margin-right: 6px; }
.sm-steps li.is-done::before, .sm-steps li.is-current::before { background: var(--accent); }
.sm-steps li.is-current { color: var(--ink); font-weight: 600; }
.sm-key-input { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center; }
.sm-key-input input { height: 52px; text-align: center; font-family: var(--font-mono); font-size: 20px; letter-spacing: .14em; text-transform: uppercase; }
.sm-key-input span { color: var(--ink-3); font-size: 20px; }
.sm-done-mark { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.sm-done-mark svg { width: 30px; height: 30px; }

@media (max-width: 900px) {
  .sm-auth { grid-template-columns: 1fr; }
  .sm-auth__visual { display: none; }
  .sm-auth__form-side { padding: 20px 16px; min-height: 100vh; }
  .sm-auth__box { padding: 32px 0; }
  .sm-key-input input { font-size: 16px; letter-spacing: .08em; }
}