/* ============================================
 * 主框架布局：侧边栏 + Header + 内容区
 * 依据设计稿 admin-shell
 * ============================================ */

.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar-backdrop,
.sidebar-toggle {
  display: none;
}

/* ============================================
 * 左侧深色侧边栏
 * ============================================ */
.sidebar {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  width: 232px;
  height: 100vh;
  background:
    radial-gradient(circle at 10% 8%, rgba(44, 130, 194, 0.22), transparent 25%),
    linear-gradient(180deg, #062D58 0%, #073967 58%, #05284E 100%);
  box-shadow: 10px 0 36px rgba(8, 47, 91, 0.08);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px;
  height: 70px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.11);
  border-radius: var(--radius-md);
  color: var(--color-text-inverse);
}

.sidebar-logo img {
  display: block;
  width: 27px;
  height: 27px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.sidebar-title {
  display: flex;
  min-width: 0;
  flex-direction: column;
  color: var(--color-text-inverse);
  white-space: nowrap;
}

.sidebar-title strong {
  overflow: hidden;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-overflow: ellipsis;
}

.sidebar-title small {
  margin-top: 1px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.12em;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 10px 8px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  margin: 2px 0;
  padding: 10px 13px;
  font-size: var(--text-base);
  font-weight: 500;
  color: rgba(240, 247, 253, 0.70);
  text-decoration: none;
  border-left: 0;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast),
              color var(--transition-fast);
  cursor: pointer;
}

.nav-item:hover:not(.disabled):not(.active) {
  background-color: rgba(255, 255, 255, 0.055);
  color: var(--color-text-inverse);
}

.nav-item.active {
  background-color: rgba(11, 100, 163, 0.82);
  color: var(--color-text-inverse);
  box-shadow: inset 3px 0 #8BC3E8;
}

.nav-item.disabled {
  color: rgba(255, 255, 255, 0.28);
  cursor: not-allowed;
  pointer-events: none;
}

.nav-item .nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-item .nav-tag {
  margin-left: auto;
  font-size: var(--text-xs);
  padding: 1px 6px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.35);
}

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 70px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sidebar-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.13);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 0;
  border: 0;
  cursor: pointer;
}

.sidebar-user-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.56);
  white-space: nowrap;
}

/* ============================================
 * 右侧主区域
 * ============================================ */
.main-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  height: 70px;
  background-color: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
}

.topbar-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.topbar-icon-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.topbar-notification-badge {
  position: absolute;
  top: -6px;
  right: -7px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border: 2px solid var(--color-bg-elevated);
  border-radius: 999px;
  background: var(--state-error);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 14px;
  text-align: center;
}

.topbar-icon-btn:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-border);
}

.topbar-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  border: 0;
}

.sidebar-avatar:focus-visible,
.topbar-avatar:focus-visible {
  outline: 2px solid var(--color-primary-lighter);
  outline-offset: 2px;
}

/* ============================================
 * 内容区
 * ============================================ */
.content-area {
  flex: 1;
  overflow-y: auto;
  min-width: 0;
  background-color: var(--color-bg);
  padding: 24px;
}

/* ============================================
 * 平板与手机：侧边栏改为可收起抽屉
 * ============================================ */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    width: min(82vw, 280px);
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
  }

  .app-container.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 40;
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    background: rgba(15, 23, 42, 0.46);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .app-container.sidebar-open .sidebar-backdrop {
    display: block;
    opacity: 1;
    pointer-events: auto;
  }

  .main-content {
    width: 100%;
  }

  .topbar {
    padding: 0 16px;
    gap: 10px;
  }

  .sidebar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    padding: 0;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
  }

  .sidebar-toggle:focus-visible {
    outline: 2px solid var(--color-primary-lighter);
    outline-offset: 2px;
  }

  .topbar-title {
    font-size: var(--text-lg);
  }

  .topbar-right {
    gap: 8px;
  }

  .content-area {
    padding: 16px;
    overscroll-behavior: contain;
  }
}

@media (max-width: 480px) {
  .topbar {
    height: 58px;
    padding: 0 12px;
  }

  .topbar-icon-btn {
    display: none;
  }

  .topbar-avatar {
    width: 30px;
    height: 30px;
  }

  .content-area {
    padding: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .sidebar-backdrop {
    transition: none;
  }
}

/* ============================================
 * 登录页布局
 * ============================================ */
.login-page {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 14%, rgba(65, 164, 224, 0.16), transparent 30%),
    radial-gradient(circle at 88% 84%, rgba(8, 47, 91, 0.12), transparent 34%),
    linear-gradient(145deg, #F7FBFF 0%, #EDF5FC 52%, #F4F8FC 100%);
  padding: 24px;
  overflow: hidden;
}

.login-page::before,
.login-page::after {
  position: absolute;
  border: 1px solid rgba(13, 98, 159, 0.10);
  border-radius: 50%;
  content: '';
  pointer-events: none;
}

.login-page::before {
  width: min(54vw, 720px);
  height: min(54vw, 720px);
  top: -32vw;
  right: -18vw;
}

.login-page::after {
  width: min(38vw, 520px);
  height: min(38vw, 520px);
  bottom: -24vw;
  left: -11vw;
}

.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background-color: rgba(255, 255, 255, 0.97);
  border: 1px solid rgba(220, 230, 240, 0.92);
  border-radius: var(--radius-lg);
  padding: 42px 36px 36px;
  box-shadow: 0 24px 70px rgba(17, 54, 91, 0.15);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
}

.login-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.login-title {
  text-align: center;
  color: var(--color-primary);
  font-size: 24px;
  font-weight: 750;
  margin: 0 0 7px;
  letter-spacing: 0.02em;
}

.login-subtitle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin: 0 0 30px;
}

.login-subtitle strong {
  color: var(--color-primary-light);
  font-size: var(--text-sm);
  font-weight: 650;
  letter-spacing: 0.12em;
}

.login-subtitle span {
  padding-left: 9px;
  border-left: 1px solid var(--color-border);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-form .form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.login-form .form-input {
  height: 44px;
  font-size: var(--text-base);
}

.btn-login {
  width: 100%;
  height: 44px;
  margin-top: 8px;
  font-size: var(--text-base);
  font-weight: 600;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform 150ms cubic-bezier(.2,.8,.2,1);
}

.btn-login:hover { background-color: var(--color-primary-light); }
.btn-login:active { transform: scale(0.98); }
.btn-login:disabled { background-color: var(--color-text-tertiary); border-color: var(--color-text-tertiary); cursor: not-allowed; }

.login-error {
  margin-top: 8px;
  padding: 8px 12px;
  font-size: var(--text-sm);
  color: var(--state-error);
  background-color: var(--state-error-bg);
  border-radius: var(--radius-md);
  text-align: center;
  min-height: 32px;
}

.login-error:empty {
  display: none;
}

.login-tip {
  margin-top: 24px;
  padding: 12px 16px;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  text-align: center;
}

.login-tip strong {
  color: var(--color-text);
  font-weight: 600;
}

@media (max-width: 480px) {
  .login-page {
    align-items: flex-start;
    padding: max(34px, 9vh) 16px 24px;
  }

  .login-card {
    padding: 34px 24px 28px;
  }

  .login-logo {
    width: 64px;
    height: 64px;
  }

  .login-title {
    font-size: 21px;
  }
}