/* ==========================================================
   Login — App ログイン画面（ライトモード）
   ========================================================== */

body.is-login {
  background: linear-gradient(135deg, #F0F4FF 0%, #E8EDFB 40%, #F5F3FF 100%);
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Particles */
.s-login__particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.s-login__particle {
  position: absolute;
  border-radius: 50%;
  animation: floatParticle linear infinite;
}
.s-login__particle:nth-child(1) { left: 10%; top: 20%; animation-duration: 18s; background: rgba(37,99,235,.08); width:80px; height:80px; }
.s-login__particle:nth-child(2) { left: 25%; top: 80%; animation-duration: 22s; animation-delay: -3s; background: rgba(124,58,237,.06); width:60px; height:60px; }
.s-login__particle:nth-child(3) { left: 55%; top: 10%; animation-duration: 15s; animation-delay: -7s; background: rgba(16,185,129,.06); width:100px; height:100px; }
.s-login__particle:nth-child(4) { left: 75%; top: 65%; animation-duration: 20s; animation-delay: -2s; background: rgba(245,158,11,.05); width:70px; height:70px; }
.s-login__particle:nth-child(5) { left: 85%; top: 25%; animation-duration: 25s; animation-delay: -10s; background: rgba(37,99,235,.05); width:50px; height:50px; }
.s-login__particle:nth-child(6) { left: 40%; top: 50%; animation-duration: 17s; animation-delay: -5s; background: rgba(124,58,237,.04); width:90px; height:90px; }

@keyframes floatParticle {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(-100vh) translateX(40px); opacity: 0; }
}

/* Layout */
.s-login {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  position: relative;
  z-index: 1;
}

/* Card */
.s-login__card {
  width: 100%;
  max-width: 420px;
  background: rgba(255,255,255,.85);
  border: 1px solid rgba(226,232,240,.6);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  backdrop-filter: blur(20px);
  box-shadow:
    0 4px 6px -1px rgba(0,0,0,.04),
    0 10px 40px -4px rgba(37,99,235,.08),
    0 0 0 1px rgba(255,255,255,.5) inset;
  animation: fadeInUp .5s ease both;
}

/* Logo */
.s-login__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: 40px;
}
.s-login__logo-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-weight: 800;
  font-size: 1.3rem;
  box-shadow: 0 4px 16px rgba(37,99,235,.25);
  flex-shrink: 0;
}
.s-login__logo-text { text-align: left; }
.s-login__logo-text strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -.02em;
}
.s-login__logo-text span {
  font-size: .75rem;
  color: var(--color-text-muted);
  letter-spacing: .04em;
}

/* Title */
.s-login__title {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 32px;
}

/* Error */
.s-login__error {
  background: var(--color-danger-light);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: fadeIn .3s ease;
}
.s-login__error-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-danger);
  margin-top: 1px;
}
.s-login__error-text {
  font-size: 1rem;
  color: #B91C1C;
  line-height: 1.5;
}

/* Form Group */
.s-login__group {
  margin-bottom: 20px;
}
.s-login__label {
  display: block;
  font-size: .86rem;
  font-weight: 600;
  color: var(--color-text-sub);
  margin-bottom: 8px;
  letter-spacing: .02em;
}
.s-login__input {
  width: 100%;
  height: 48px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 16px;
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.s-login__input::placeholder {
  color: var(--color-border-input);
}
.s-login__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.s-login__input.is-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}

/* Password wrapper */
.s-login__password-wrap {
  position: relative;
}
.s-login__password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.s-login__password-toggle:hover {
  color: var(--color-text-sub);
  background: var(--color-border-light);
}
.s-login__password-toggle svg {
  width: 18px;
  height: 18px;
}

/* Submit */
.s-login__submit {
  width: 100%;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-white);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}
.s-login__submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent-purple));
  opacity: 0;
  transition: opacity var(--transition-base);
}
.s-login__submit:hover::before { opacity: 1; }
.s-login__submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(37,99,235,.3);
}
.s-login__submit:active {
  transform: translateY(0);
}
.s-login__submit span { position: relative; z-index: 1; }

/* Links */
.s-login__links {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.s-login__link {
  font-size: .86rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.s-login__link:hover {
  color: var(--color-primary);
}

/* Divider */
.s-login__divider {
  width: 100%;
  height: 1px;
  background: var(--color-border-light);
  margin: 4px 0;
}

/* Footer */
.s-login__footer {
  text-align: center;
  padding: var(--space-md);
  z-index: 1;
  position: relative;
}
.s-login__footer-text {
  font-size: .75rem;
  color: var(--color-text-muted);
}

/* ==========================================================
   IDを記憶する チェックボックス
   ========================================================== */

.s-login__remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  margin-top: -4px;
}

.s-login__remember input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.s-login__remember label {
  font-size: .86rem;
  color: var(--color-text-sub);
  cursor: pointer;
  user-select: none;
}

/* ==========================================================
   State B: パスワードのみ -- 選択中アカウントカード
   ========================================================== */

.s-login__selected-account {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: linear-gradient(135deg, #F0F4FF, #F5F3FF);
  border: 1px solid rgba(37,99,235,.12);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
  position: relative;
}

.s-login__selected-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border: none;
  background: none;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

.s-login__selected-remove:hover {
  opacity: 1;
  color: var(--color-danger);
  background: rgba(239,68,68,.08);
}

.s-login__account-avatar {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-weight: 700;
  font-size: 1.15rem;
  box-shadow: 0 2px 8px rgba(37,99,235,.2);
}

.s-login__account-info {
  flex: 1;
  min-width: 0;
}

.s-login__account-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.s-login__account-detail {
  font-size: .86rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================
   State C: アカウントリスト
   ========================================================== */

.s-login__account-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.s-login__account-item {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  overflow: hidden;
}

.s-login__account-item:hover {
  border-color: rgba(37,99,235,.3);
  box-shadow: 0 2px 12px rgba(37,99,235,.08);
}

.s-login__account-item-main {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  min-width: 0;
}

.s-login__account-item .s-login__account-avatar {
  width: 38px;
  height: 38px;
  min-width: 38px;
  font-size: 1rem;
}

.s-login__account-item .s-login__account-name {
  font-size: 1rem;
  font-weight: 600;
}

.s-login__account-item .s-login__account-detail {
  font-size: .86rem;
}

.s-login__account-arrow {
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.s-login__account-item-main:hover .s-login__account-arrow {
  color: var(--color-primary);
  transform: translateX(2px);
}

.s-login__account-remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  min-width: 36px;
  height: 100%;
  min-height: 66px;
  color: var(--color-text-muted);
  border: none;
  background: none;
  cursor: pointer;
  border-left: 1px solid var(--color-border-light);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.s-login__account-remove:hover {
  color: var(--color-danger);
  background: var(--color-danger-light);
}

/* ==========================================================
   別のアカウントでログイン
   ========================================================== */

.s-login__alt-action {
  text-align: center;
  margin-top: 20px;
  margin-bottom: 4px;
}

.s-login__alt-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .86rem;
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.s-login__alt-link:hover {
  color: var(--color-primary-dark);
}

.s-login__alt-link svg {
  flex-shrink: 0;
}

/* ==========================================================
   State 切り替えアニメーション
   ========================================================== */

.s-login__state {
  animation: fadeIn .25s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media screen and (max-width: 480px) {
  .s-login__card {
    padding: 36px 24px;
    border-radius: var(--radius-lg);
  }
  .s-login__logo-text strong {
    font-size: 1.15rem;
  }
}