/* ============================================
   Sakura Shadowrocket — Apple-inspired Design
   ============================================ */

/* ===== Light Theme ===== */
:root,
[data-theme="light"] {
  --color-primary: #0071e3;
  --color-primary-hover: #0077ED;
  --color-primary-active: #006edb;
  --color-on-primary: #fff;

  --color-bg: #fbfbfd;
  --color-bg-secondary: #f5f5f7;
  --color-bg-tertiary: #e8e8ed;
  --color-surface: #fff;
  --color-surface-hover: #fafafa;
  --color-surface-border: rgba(0,0,0,0.06);

  --color-text-primary: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-text-tertiary: #86868b;
  --color-text-link: #0066cc;

  --color-success: #34c759;
  --color-success-bg: rgba(52,199,89,0.1);
  --color-error: #ff3b30;
  --color-error-bg: rgba(255,59,48,0.1);
  --color-warning: #ff9f0a;

  --color-overlay: rgba(0,0,0,0.48);

  --nav-bg: rgba(251,251,253,0.72);
  --nav-border: rgba(0,0,0,0.08);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --fab-shadow: 0 4px 14px rgba(0,0,0,0.12), 0 2px 6px rgba(0,0,0,0.06);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-base: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-3xl: 64px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", Arial, "PingFang SC", "Noto Sans SC",
    "Microsoft YaHei", sans-serif;

  --font-display: 700 56px/1.07 var(--font);
  --font-headline: 600 40px/1.1 var(--font);
  --font-title1: 600 28px/1.21 var(--font);
  --font-title2: 600 22px/1.27 var(--font);
  --font-title3: 600 17px/1.29 var(--font);
  --font-body: 400 17px/1.47 var(--font);
  --font-body-sm: 400 14px/1.43 var(--font);
  --font-caption: 400 12px/1.33 var(--font);
  --font-label: 500 14px/1.14 var(--font);
  --font-label-sm: 500 12px/1.17 var(--font);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  --max-width: 1080px;
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
  --color-primary: #2997ff;
  --color-primary-hover: #3ea3ff;
  --color-primary-active: #1a8eff;
  --color-on-primary: #fff;

  --color-bg: #000000;
  --color-bg-secondary: #1c1c1e;
  --color-bg-tertiary: #2c2c2e;
  --color-surface: #1c1c1e;
  --color-surface-hover: #252528;
  --color-surface-border: rgba(255,255,255,0.08);

  --color-text-primary: #f5f5f7;
  --color-text-secondary: #a1a1a6;
  --color-text-tertiary: #6e6e73;
  --color-text-link: #2997ff;

  --color-success: #30d158;
  --color-success-bg: rgba(48,209,88,0.12);
  --color-error: #ff453a;
  --color-error-bg: rgba(255,69,58,0.12);
  --color-warning: #ffa60a;

  --color-overlay: rgba(0,0,0,0.6);

  --nav-bg: rgba(0,0,0,0.72);
  --nav-border: rgba(255,255,255,0.08);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.12);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,0.28), 0 2px 6px rgba(0,0,0,0.14);
  --fab-shadow: 0 4px 14px rgba(0,0,0,0.24), 0 2px 6px rgba(0,0,0,0.16);
}

/* ===== Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; -webkit-tap-highlight-color: transparent; }
input { font: inherit; color: inherit; background: none; border: none; outline: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== Navigation ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--nav-border);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.nav__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 52px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-primary);
}

.nav__logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  object-fit: cover;
}

.nav__title {
  font: var(--font-title3);
  letter-spacing: -0.01em;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav__btn:hover {
  background: var(--color-surface-border);
  color: var(--color-text-primary);
}

/* Theme icon toggle */
[data-theme="light"] .icon-dark,
[data-theme="dark"] .icon-light { display: none; }
[data-theme="light"] .icon-light,
[data-theme="dark"] .icon-dark { display: block; }

/* ===== Search Overlay ===== */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 150;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--nav-border);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
  pointer-events: none;
}

.search-overlay--open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.search-overlay__container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-lg);
  height: 52px;
}

.search-overlay__icon {
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}

.search-overlay__input {
  flex: 1;
  font: var(--font-body);
  color: var(--color-text-primary);
  background: transparent;
}

.search-overlay__input::placeholder {
  color: var(--color-text-tertiary);
}

.search-overlay__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}

.search-overlay__close:hover {
  background: var(--color-surface-border);
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
  text-align: center;
  background: var(--color-bg);
  transition: background var(--transition-base);
}

.hero__content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__logo {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  margin: 0 auto var(--spacing-lg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.hero__title {
  font: var(--font-headline);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font: var(--font-title2);
  color: var(--color-text-secondary);
  letter-spacing: -0.01em;
  margin-bottom: var(--spacing-lg);
}

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: 100px;
  background: var(--color-bg-secondary);
  transition: background var(--transition-base);
}

.hero__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  flex-shrink: 0;
}

.hero__dot--active { background: var(--color-success); }
.hero__dot--error { background: var(--color-error); }
.hero__dot--loading {
  background: var(--color-text-tertiary);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__status-text {
  font: var(--font-label-sm);
  color: var(--color-text-secondary);
}

/* ===== Section ===== */
.section {
  padding: 0 var(--spacing-lg);
}

.section__content {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ===== Filter Chips ===== */
.section--filters {
  padding-top: var(--spacing-base);
  padding-bottom: var(--spacing-sm);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 16px;
  border-radius: 100px;
  border: 1px solid var(--color-surface-border);
  background: transparent;
  color: var(--color-text-secondary);
  font: var(--font-label);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.chip:hover {
  background: var(--color-surface-border);
  color: var(--color-text-primary);
}

.chip--selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.chip--selected:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-on-primary);
}

.chip__check {
  display: none;
  width: 14px;
  height: 14px;
}

.chip--selected .chip__check { display: block; }

.chip__flag {
  font-size: 14px;
  line-height: 1;
}

/* ===== Notice / FAQ ===== */
.section--notice {
  padding-top: var(--spacing-base);
  padding-bottom: var(--spacing-base);
}

.notice {
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  overflow: hidden;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.notice__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-base) var(--spacing-lg);
  color: var(--color-text-secondary);
  text-align: left;
}

.notice__toggle:hover {
  background: var(--color-surface-hover);
}

.notice__toggle-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font: var(--font-label);
  color: var(--color-warning);
}

.notice__arrow {
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.notice__toggle[aria-expanded="true"] .notice__arrow {
  transform: rotate(180deg);
}

.notice__content {
  padding: 0 var(--spacing-lg) var(--spacing-base);
}

.notice__content[hidden] { display: none; }

.notice__item {
  padding: var(--spacing-md) 0;
}

.notice__item + .notice__item {
  border-top: 1px solid var(--color-surface-border);
}

.notice__item h3 {
  font: var(--font-label);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.notice__item p {
  font: var(--font-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== Account Cards ===== */
.section--accounts {
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-xxl);
}

.accounts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-base);
}

.account-card {
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.account-card:hover {
  box-shadow: var(--card-shadow-hover);
  border-color: transparent;
  transform: translateY(-2px);
}

.account-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.account-card__email {
  font: var(--font-body);
  color: var(--color-text-primary);
  word-break: break-all;
  letter-spacing: -0.01em;
}

.account-card__region {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 100px;
  font: var(--font-label-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

.account-card__region-flag {
  font-size: 12px;
  line-height: 1;
}

.account-card__body {
  flex: 1;
  margin-bottom: var(--spacing-md);
}

.account-card__info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.account-card__status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font: var(--font-label-sm);
  padding: 2px 8px;
  border-radius: 100px;
}

.account-card__status--active {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.account-card__status--disabled {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.account-card__status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.account-card__check-time {
  font: var(--font-caption);
  color: var(--color-text-tertiary);
}

.account-card__apps {
  font: var(--font-body-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

.account-card__actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  border-radius: 100px;
  font: var(--font-label);
  transition: all var(--transition-fast);
  user-select: none;
  flex: 1;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
  transform: scale(0.98);
}

.btn--secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-surface-border);
}

.btn--secondary:hover {
  background: var(--color-bg-tertiary);
}

.btn--secondary:active {
  transform: scale(0.98);
}

.btn--copied {
  background: var(--color-success) !important;
  color: #fff !important;
  border-color: transparent !important;
}

/* ===== Empty State ===== */
.accounts__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-3xl);
  color: var(--color-text-tertiary);
  text-align: center;
}

.accounts__empty[hidden] { display: none; }
.accounts__empty p { font: var(--font-body); }

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--color-surface-border);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  transition: border-color var(--transition-base);
}

.footer__content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font: var(--font-label);
  color: var(--color-text-primary);
}

.footer__logo {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  object-fit: cover;
}

.footer__copy {
  font: var(--font-body-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.footer__disclaimer {
  font: var(--font-caption);
  color: var(--color-text-tertiary);
}

/* ===== Back to Top ===== */
.btt {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  box-shadow: var(--fab-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: opacity var(--transition-base), transform var(--transition-base), box-shadow var(--transition-fast);
}

.btt:hover {
  color: var(--color-text-primary);
  box-shadow: var(--card-shadow-hover);
}

.btt[hidden] {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.btt:not([hidden]) {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%) translateY(0);
  min-width: 240px;
  max-width: min(480px, calc(100vw - 48px));
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-text-primary);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  font: var(--font-label);
  text-align: center;
  z-index: 200;
  box-shadow: 0 8px 32px rgba(0,0,0,0.16);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.toast[hidden] {
  opacity: 0;
  transform: translateX(-50%) translateY(16px);
  pointer-events: none;
}

.toast:not([hidden]) {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.toast__text { display: block; }

/* ===== Responsive ===== */
@media (max-width: 479px) {
  .hero { padding: var(--spacing-xxl) var(--spacing-base) var(--spacing-xl); }
  .hero__title { font: 600 32px/1.1 var(--font); }
  .hero__subtitle { font: 500 18px/1.3 var(--font); }
  .hero__logo { width: 64px; height: 64px; }

  .section { padding-left: var(--spacing-base); padding-right: var(--spacing-base); }
  .nav__content { padding: 0 var(--spacing-base); }

  .accounts {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .account-card { padding: var(--spacing-base); }

  .account-card__header {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .account-card__actions { flex-direction: column; }
  .btn { width: 100%; }

  .toast {
    min-width: auto;
    max-width: calc(100vw - 32px);
    left: 16px; right: 16px;
    transform: none;
  }
  .toast[hidden] { transform: translateY(16px); }
  .toast:not([hidden]) { transform: translateY(0); }
}

@media (min-width: 480px) and (max-width: 767px) {
  .accounts { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .accounts { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

@media (min-width: 1024px) {
  .nav__content,
  .search-overlay__container { padding-left: 0; padding-right: 0; }
}

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

.hero__content {
  animation: fadeInUp 0.6s ease-out;
}

.account-card {
  animation: fadeInUp 0.4s ease-out both;
}

.account-card:nth-child(1) { animation-delay: 0.05s; }
.account-card:nth-child(2) { animation-delay: 0.1s; }
.account-card:nth-child(3) { animation-delay: 0.15s; }
.account-card:nth-child(4) { animation-delay: 0.2s; }
.account-card:nth-child(5) { animation-delay: 0.25s; }
.account-card:nth-child(6) { animation-delay: 0.3s; }
.account-card:nth-child(7) { animation-delay: 0.35s; }
.account-card:nth-child(8) { animation-delay: 0.4s; }
.account-card:nth-child(9) { animation-delay: 0.45s; }
.account-card:nth-child(10) { animation-delay: 0.5s; }