/* =====================================================================
   ログイン・パスワード変更画面（login.html / change_password.html）
   ※ アニメーション名（fadeIn, fadeOut, checkScale, errorPulse, successPulse,
     shake, waveAnimation, particleAnimation）は画面のスクリプトから参照される
   ===================================================================== */

.auth-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 32px 16px;
  overflow-x: hidden;
}

.auth-theme-toggle { position: fixed; top: 18px; right: 18px; z-index: 10; }

.login-container,
.password-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 420px;
  padding: 40px 36px 34px;
  border-radius: 34px;
  background: var(--surface);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: pop-in 0.7s var(--ease-spring) both;
  transition: box-shadow 0.5s var(--ease-out);
}

/* ロゴ */
.logo {
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  margin: 0 auto 18px;
  border-radius: 26px;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--glow);
  animation: logo-float 5s ease-in-out infinite;
}
.logo svg { width: 40px; height: 40px; }
@keyframes logo-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(-5deg); }
}

.login-container h2,
.password-container h2 {
  margin: 0 0 4px;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.auth-sub { margin: 0 0 24px; color: var(--text-3); font-size: 0.88rem; }

/* フォーム */
#loginForm,
#passwordForm {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}
.input-wrap { position: relative; }
.input-wrap svg {
  position: absolute;
  top: 50%;
  left: 16px;
  width: 20px;
  height: 20px;
  transform: translateY(-50%);
  color: var(--text-3);
  pointer-events: none;
  transition: color 0.2s;
}
.input-wrap input { width: 100%; min-height: 52px; padding-left: 48px; border-radius: var(--pill); }
.input-wrap:focus-within svg { color: var(--primary); }
#passwordForm input { width: 100%; min-height: 50px; border-radius: var(--pill); padding-left: 20px; }
.password-label { margin: 6px 0 -4px 12px; color: var(--text-2); font-weight: 700; font-size: 0.84rem; }
#loginButton,
#passwordForm button { width: 100%; min-height: 52px; margin-top: 6px; font-size: 1rem; }
.back-button { margin-top: 0 !important; }

/* サーバーから渡されるエラー */
.error-message {
  margin: 0 0 16px;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  background: var(--danger-soft);
  color: var(--danger);
  font-weight: 700;
  font-size: 0.9rem;
  animation: shake 0.45s;
}

/* パスワード変更の結果メッセージ（スクリプトが表示を切り替える） */
.password-container .message { display: none; margin-top: 16px; }
.password-container .success-message { background: var(--success-soft); color: var(--success); }
.password-container .error-message { background: var(--danger-soft); color: var(--danger); }

/* ローディング・成功・失敗の表示 */
.loading-spinner { display: none; }
.success-checkmark,
.error-xmark { display: none; margin: 12px auto 6px; }
.check-icon,
.x-icon {
  position: relative;
  width: 84px;
  height: 84px;
  margin: 0 auto;
  border-radius: 50%;
  transform: scale(0);
}
.check-icon { background: linear-gradient(135deg, #2fd27a, #12a150); box-shadow: 0 14px 30px -10px rgba(18, 161, 80, 0.7); }
.x-icon { background: linear-gradient(135deg, #ff7a7e, #e5484d); box-shadow: 0 14px 30px -10px rgba(229, 72, 77, 0.7); }
.check-icon::after {
  content: "";
  position: absolute;
  left: 30px;
  top: 20px;
  width: 20px;
  height: 36px;
  border: solid #fff;
  border-width: 0 7px 7px 0;
  border-radius: 3px;
  transform: rotate(45deg);
}
.x-icon::before,
.x-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 40px;
  height: 7px;
  border-radius: 7px;
  background: #fff;
}
.x-icon::before { transform: translate(-50%, -50%) rotate(45deg); }
.x-icon::after { transform: translate(-50%, -50%) rotate(-45deg); }

.login-container .success-message,
.error-message-large {
  display: none;
  margin-top: 12px;
  font-size: 1.15rem;
  font-weight: 800;
  opacity: 0;  /* ログイン画面ではスクリプトが fadeIn で表示する */
}
.login-container .success-message { color: var(--success); }
.error-message-large { color: var(--danger); }

/* 波紋（成功・失敗時に広がる輪） */
.wave-container {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}
.wave {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 3px solid var(--primary);
  background: radial-gradient(circle, transparent 55%, var(--primary-soft) 100%);
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
}
.wave.error-wave { border-color: var(--danger); background: radial-gradient(circle, transparent 55%, var(--danger-soft) 100%); }

/* パーティクル */
.particles { position: fixed; inset: 0; z-index: 3; pointer-events: none; }
.particle { position: absolute; border-radius: 50%; pointer-events: none; }

/* ---------- スクリプトから使うアニメーション ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-10px); }
}
@keyframes checkScale {
  0%   { transform: scale(0) rotate(-20deg); }
  100% { transform: scale(1) rotate(0deg); }
}
@keyframes successPulse {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(18, 161, 80, 0.35); }
  50%      { box-shadow: var(--shadow-lg), 0 0 0 14px rgba(18, 161, 80, 0); }
}
@keyframes errorPulse {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(229, 72, 77, 0.35); }
  50%      { box-shadow: var(--shadow-lg), 0 0 0 14px rgba(229, 72, 77, 0); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-10px); }
  40% { transform: translateX(9px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(4px); }
}
@keyframes waveAnimation {
  0%   { transform: translate(-50%, -50%) scale(0); opacity: 1; }
  70%  { opacity: 0.35; }
  100% { transform: translate(-50%, -50%) scale(5); opacity: 0; }
}
@keyframes particleAnimation {
  0%   { transform: translate(0, 0) scale(1); opacity: 1; }
  100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}

@media (max-width: 480px) {
  .login-container, .password-container { padding: 32px 22px 26px; border-radius: 28px; }
}