/* =============================================================================
   NiraiDesk ログイン画面 / style.css
   世界観: 深い紺(海)× 生成りの和紙(余白)。落ち着き・信頼・凪。
   Step 3-a。
   ============================================================================= */

:root {
  --navy: #16223c;
  --navy-deep: #0e1830;
  --navy-soft: #243454;
  --paper: #f6f1e8;
  --paper-2: #efe7d8;
  --card: #fffdf8;
  --ink: #1f2733;
  --ink-soft: #5c6473;
  --line: #d8cebd;
  --terra: #c1623a;
  --terra-deep: #a44f2d;
  --ok: #2f7a55;
  --err: #b23b32;
  --shadow: 0 1px 0 rgba(22,34,60,.03), 0 24px 60px -36px rgba(22,34,60,.55);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.stage {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}

/* ---- 左:世界観パネル ---- */
.brand {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 20% 0%, rgba(36,52,84,.85), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #f4efe7;
}
.brand-horizon {
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 18%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(244,239,231,.35), transparent);
  box-shadow: 0 40px 120px 40px rgba(193,98,58,.10);
}
.brand-horizon::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 1px;
  height: 42vh;
  background: radial-gradient(120% 100% at 50% 0%, rgba(14,24,48,.0), rgba(14,24,48,.55));
}
.brand-inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  padding: 64px 56px;
}
.brand-mark {
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  font-size: 30px;
  letter-spacing: .08em;
  color: #fff;
}
.brand-mark::before {
  content: "";
  display: block;
  width: 38px;
  height: 2px;
  background: var(--terra);
  margin-bottom: 18px;
  border-radius: 2px;
}
.brand-copy {
  font-family: 'Shippori Mincho', serif;
  font-weight: 600;
  font-size: 26px;
  line-height: 1.7;
  margin: 0;
  color: #f4efe7;
}
.brand-foot {
  margin: 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(244,239,231,.62);
  line-height: 2;
}

/* ---- 右:フォームパネル ---- */
.panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 48px 32px 28px;
  background:
    radial-gradient(900px 500px at 110% -10%, rgba(193,98,58,.06), transparent 55%),
    var(--paper);
}
.form-wrap {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px 32px 30px;
  box-shadow: var(--shadow);
}
.form-head { margin-bottom: 22px; }
.form-mark {
  display: none;
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .06em;
  font-size: 20px;
  margin-bottom: 14px;
}
.form-head h1 {
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  font-size: 22px;
  color: var(--navy);
  margin: 0 0 6px;
  letter-spacing: .04em;
}
.lead {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.field { margin-top: 16px; }
.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
input[type="email"],
input[type="password"],
input[type="text"] {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
}
input:focus {
  outline: none;
  border-color: var(--terra);
  box-shadow: 0 0 0 3px rgba(193,98,58,.12);
}

.pw-row { position: relative; display: flex; align-items: center; }
.pw-row input { padding-right: 58px; }
.pw-toggle {
  position: absolute;
  right: 6px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12px;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 500;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 7px;
}
.pw-toggle:hover { color: var(--terra-deep); background: var(--paper-2); }

.submit {
  position: relative;
  width: 100%;
  margin-top: 24px;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background .15s, transform .04s;
}
.submit:hover { background: var(--navy-soft); }
.submit:active { transform: translateY(1px); }
.submit:disabled { opacity: .7; cursor: default; }
.submit.is-loading .submit-label { visibility: hidden; }
.submit .spinner {
  display: none;
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 18px;
  margin: -9px 0 0 -9px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.submit.is-loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.alert {
  margin-bottom: 4px;
  padding: 10px 13px;
  border-radius: 10px;
  font-size: 13px;
  background: rgba(178,59,50,.08);
  color: var(--err);
  border: 1px solid rgba(178,59,50,.22);
}
.alert.is-ok {
  background: rgba(47,122,85,.08);
  color: var(--ok);
  border-color: rgba(47,122,85,.22);
}

.help {
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
  text-align: center;
}

.totp-lead {
  margin: 0 0 4px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}
#totp {
  letter-spacing: .4em;
  text-align: center;
  font-size: 20px;
  font-family: 'JetBrains Mono', 'Noto Sans JP', monospace;
}
.link-back {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 13px;
  cursor: pointer;
}
.link-back:hover { color: var(--terra-deep); }

.page-foot {
  margin-top: 22px;
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---- レスポンシブ:狭い画面では世界観パネルを上に薄く ---- */
@media (max-width: 860px) {
  .stage { grid-template-columns: 1fr; }
  .brand { display: none; }
  .form-mark { display: block; }
  .panel { padding: 32px 20px 24px; min-height: 100dvh; }
}

/* ---- テキストリンク(ログイン⇄新規登録の相互導線・S58 追加)---- */
.text-link {
  color: var(--terra-deep);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(164,79,45,.35);
}
.text-link:hover { color: var(--terra); border-bottom-color: var(--terra); }