/* ============================================================
   ver1_login/login.css — ログイン画面 (メール + 認証コード)
   ------------------------------------------------------------
   ../common/tokens.css + ../common/components.css を継承
   ============================================================ */

/* -------------------- ステージ -------------------- */
html, body, #root { height: 100%; }
body {
  overflow: auto;
  background:
    radial-gradient(900px 700px at 80% -10%, rgba(31, 111, 235, 0.10), transparent 60%),
    radial-gradient(800px 600px at -10% 110%, rgba(110, 64, 201, 0.08), transparent 60%),
    var(--bg);
}

.auth-stage {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 0 24px;
}

/* -------------------- ヘッダ -------------------- */
.auth-head {
  display: flex; align-items: center;
  gap: 10px;
  padding: 20px 0;
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
}
.auth-head .logo {
  width: 28px; height: 28px;
  background: var(--accent-2);
  color: white;
  border-radius: var(--radius-md);
  display: grid; place-items: center;
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: -0.02em;
}
.auth-head .brand {
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--text);
  letter-spacing: -0.01em;
}
.auth-head .spacer { flex: 1; }
.auth-head .help {
  font-size: 12px;
  color: var(--muted);
}
.auth-head .help a {
  color: var(--accent);
  text-decoration: none;
}
.auth-head .help a:hover { text-decoration: underline; }

/* -------------------- 本体 (カード) -------------------- */
.auth-body {
  display: grid; place-items: center;
  padding: 20px 0 60px;
}
.auth-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: relative;
}

/* ステップピル */
.step-row {
  display: flex; align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}
.step-row .pip {
  flex: 1; height: 3px;
  background: var(--panel-3);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.step-row .pip .fill {
  position: absolute; inset: 0; right: auto;
  width: 0%;
  background: var(--accent);
  transition: width var(--dur-slow) var(--ease);
}
.step-row .pip.done .fill { width: 100%; }
.step-row .pip.current .fill { width: 50%; }

.auth-card h1 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.auth-card .lead {
  margin: 0 0 22px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.auth-card .lead strong {
  color: var(--text);
  font-weight: 600;
}

/* -------------------- フォーム共通 -------------------- */
.auth-form { display: flex; flex-direction: column; gap: 14px; }

.auth-field { display: flex; flex-direction: column; gap: 5px; }
.auth-field > label {
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.02em;
  font-weight: 500;
}
.auth-field input[type="email"],
.auth-field input[type="text"] {
  font-size: 14px;
  padding: 11px 12px;
  background: var(--bg-deep);
}
.auth-field input::placeholder { color: var(--muted-2); }

.auth-field.error input { border-color: var(--bad); }
.auth-field .err-msg {
  font-size: 11.5px;
  color: var(--bad);
  display: flex; align-items: center; gap: 5px;
  margin-top: 2px;
}

.auth-cta {
  display: flex; align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent-2);
  color: white;
  border: 1px solid var(--accent-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease);
}
.auth-cta:hover:not(:disabled) { background: #2f7ff0; }
.auth-cta:disabled {
  background: var(--panel-3);
  border-color: var(--border);
  color: var(--muted);
  cursor: not-allowed;
}
.auth-cta .spin {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  animation: auth-spin 0.8s linear infinite;
}
@keyframes auth-spin {
  to { transform: rotate(360deg); }
}

/* 区切り */
.auth-divider {
  display: flex; align-items: center;
  gap: 12px;
  margin: 4px 0;
  font-size: 11px;
  color: var(--muted-2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1; height: 1px;
  background: var(--border-soft);
}

/* SSO ボタン */
.sso-btn {
  display: flex; align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
  text-align: left;
  width: 100%;
}
.sso-btn:hover {
  background: var(--panel-3);
  border-color: var(--border-hover);
}
.sso-btn .icon {
  width: 18px; height: 18px;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.sso-btn .label { flex: 1; }
.sso-btn .arrow { color: var(--muted-2); }

.sso-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.sso-row .sso-btn {
  padding: 9px 10px;
  font-size: 12.5px;
  justify-content: center;
}

/* -------------------- OTP 入力 -------------------- */
.otp-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin: 4px 0 4px;
}
.otp-cell {
  height: 56px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 600;
  text-align: center;
  outline: none;
  transition: all var(--dur-fast) var(--ease);
  letter-spacing: 0;
  padding: 0;
}
.otp-cell:focus,
.otp-cell.focused {
  border-color: var(--accent);
  background: var(--panel-2);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.otp-cell.filled {
  border-color: var(--border-hover);
  color: var(--text);
}
.otp-cell.error {
  border-color: var(--bad);
  background: var(--bad-bg);
  animation: otp-shake 0.4s var(--ease);
}
@keyframes otp-shake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-3px); }
  75%      { transform: translateX(3px); }
}

/* OTP コンテキスト */
.otp-context {
  display: flex; align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-deep);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
  font-size: 12.5px;
}
.otp-context .email-text {
  color: var(--text);
  font-weight: 500;
  font-family: var(--mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.otp-context .change {
  color: var(--accent);
  font-size: 11.5px;
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.otp-context .change:hover { text-decoration: underline; }

/* 再送 */
.resend-row {
  display: flex; align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
}
.resend-row button {
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  padding: 0;
}
.resend-row button:disabled {
  color: var(--muted-2);
  cursor: not-allowed;
}
.resend-row button:hover:not(:disabled) { text-decoration: underline; }
.resend-row .timer {
  font-family: var(--mono);
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-2);
}

/* 戻るリンク */
.auth-back {
  display: inline-flex; align-items: center;
  gap: 6px;
  background: none; border: none;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  margin-top: 2px;
}
.auth-back:hover { color: var(--text); }

/* チェックボックス (利用規約等) */
.checkbox-row {
  display: flex; align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}
.checkbox-row input[type="checkbox"] {
  appearance: none;
  width: 16px; height: 16px;
  flex-shrink: 0;
  background: var(--bg-deep);
  border: 1.5px solid var(--border-hover);
  border-radius: 3px;
  cursor: pointer;
  display: grid; place-items: center;
  margin-top: 2px;
  padding: 0;
}
.checkbox-row input[type="checkbox"]:checked {
  background: var(--accent-2);
  border-color: var(--accent-2);
}
.checkbox-row input[type="checkbox"]:checked::after {
  content: "";
  width: 9px; height: 5px;
  border-left: 1.75px solid white;
  border-bottom: 1.75px solid white;
  transform: rotate(-45deg) translate(1px, -1px);
}
.checkbox-row a {
  color: var(--accent);
  text-decoration: none;
}
.checkbox-row a:hover { text-decoration: underline; }

/* -------------------- 開発用: 認証コード通知 -------------------- */
.dev-toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 24px;
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex; align-items: center; gap: 10px;
  font-size: 12.5px;
  color: var(--text-2);
  z-index: 100;
  animation: toast-in 0.35s var(--ease);
  max-width: calc(100vw - 32px);
}
@keyframes toast-in {
  from { transform: translate(-50%, 14px); opacity: 0; }
  to   { transform: translate(-50%, 0); opacity: 1; }
}
.dev-toast .badge {
  font-size: 9.5px;
  background: var(--accent-bg);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.dev-toast .code {
  font-family: var(--mono);
  color: var(--text);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  letter-spacing: 0.1em;
  font-weight: 600;
}
.dev-toast button {
  background: none; border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  padding: 0 0 0 4px;
}
.dev-toast button:hover { color: var(--text); }

/* -------------------- フッタ -------------------- */
.auth-foot {
  text-align: center;
  padding: 20px 0 24px;
  font-size: 11.5px;
  color: var(--muted-2);
}
.auth-foot a {
  color: var(--muted);
  text-decoration: none;
  margin: 0 10px;
}
.auth-foot a:hover { color: var(--text); }

/* -------------------- 成功画面 -------------------- */
.auth-success {
  text-align: center;
  padding: 8px 0;
}
.auth-success .check-circle {
  width: 56px; height: 56px;
  background: var(--good);
  color: black;
  border-radius: 50%;
  display: grid; place-items: center;
  margin: 0 auto 18px;
  animation: pop-in 0.45s var(--ease);
}
@keyframes pop-in {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
.auth-success h1 { margin-bottom: 8px; }
.auth-success .lead { margin-bottom: 20px; }
.auth-success .loading-text {
  font-size: 11.5px;
  color: var(--muted);
  display: flex; align-items: center; gap: 6px;
  justify-content: center;
  margin-top: 12px;
}
.auth-success .loading-text .dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--muted);
  animation: dot-pulse 1.2s ease-in-out infinite;
}
.auth-success .loading-text .dot:nth-child(2) { animation-delay: 0.15s; }
.auth-success .loading-text .dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes dot-pulse {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 1; }
}

/* -------------------- アニメ: ステップ切り替え -------------------- */
.step-anim-enter {
  opacity: 0;
  transform: translateY(6px);
}
.step-anim-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}