/* ==========================================================================
   Steam Deals — 设计令牌
   来源：21st.dev Darkmatter 主题（dark 模式）+ Glowing Card / Product Card 的
   玻璃拟态悬浮质感。主色 #e78a53（琥珀），辅色 #5f8787（青灰），
   背景 #121113，圆角 0.75rem，等宽字体。
   ========================================================================== */
:root {
  --color-bg: #0e0d10;
  --color-surface: #151417;
  --color-surface-raised: #1b1a1f;
  --color-border: #262429;
  --color-border-strong: #37343c;
  --color-text: #c9c7cc;
  --color-text-strong: #f2efec;
  --color-muted: #85828a;
  --color-primary: #e78a53;
  --color-primary-soft: rgba(231, 138, 83, 0.14);
  --color-secondary: #5f8787;
  --color-danger: #d66a5a;

  --radius-card: 0.75rem;
  --radius-control: 0.625rem;
  --radius-pill: 999px;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 18px 44px -18px rgba(231, 138, 83, 0.38),
                  0 2px 10px rgba(0, 0, 0, 0.5);

  --font-mono: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular,
               Menlo, Consolas, monospace;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;

  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(60rem 30rem at 15% -10%, rgba(231, 138, 83, 0.10), transparent 60%),
    radial-gradient(50rem 26rem at 95% 0%, rgba(95, 135, 135, 0.10), transparent 55%);
  background-attachment: fixed;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.app-shell {
  max-width: 78rem;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-7);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
  font-size: 1.0625rem;
  color: var(--color-text-strong);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-control);
  background: linear-gradient(140deg, var(--color-primary), #b8613a);
  color: #16130f;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-text b {
  color: var(--color-primary);
  font-weight: 700;
}

.site-header__tagline {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}

.control-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: stretch;
}

.search-field {
  position: relative;
  flex: 1 1 20rem;
  display: flex;
  align-items: center;
}

.search-field__icon {
  position: absolute;
  left: 0.875rem;
  color: var(--color-muted);
  font-size: 1.05rem;
  pointer-events: none;
}

.search-field__input {
  width: 100%;
  padding: 0.7rem 0.9rem 0.7rem 2.4rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-strong);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-field__input::placeholder {
  color: var(--color-muted);
}

.search-field__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.price-field {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
}

.price-field__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.price-field__select {
  /* 不再用 appearance:none —— 去掉它会关掉浏览器对原生弹层的深色主题，
     表现就是下拉列表白底浅字。保留原生外观，弹层才会跟随 color-scheme: dark。 */
  appearance: auto;
  border: none;
  background: transparent;
  color: var(--color-text-strong);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.7rem 0.25rem;
  cursor: pointer;
  color-scheme: dark;
}

/* 下拉弹层：Chromium 会尊重 option 的 background/color */
.price-field__select option,
.price-field__select optgroup {
  background-color: #1b1a1f;
  color: var(--color-text-strong);
}

.price-field__select option:checked {
  background-color: var(--color-primary);
  color: #1a1206;
  font-weight: 600;
}

.price-field__select option:hover {
  background-color: #2a2730;
}

.price-field__select:focus {
  outline: none;
}

.price-field:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

/* --------------------------------------------------------------------------
   Result bar
   -------------------------------------------------------------------------- */
.result-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  min-height: 1.75rem;
}

.result-bar__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.result-bar__count b {
  color: var(--color-primary);
}

.result-bar__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-secondary);
  opacity: 0.9;
}

.btn-ghost {
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Grid + card
   -------------------------------------------------------------------------- */
.deals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
  gap: var(--space-4);
}

.game-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--color-surface-raised), var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

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

.game-card__media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  background: #1d1b21;
  overflow: hidden;
}

.game-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 320ms cubic-bezier(0.4, 0, 0.2, 1);
}

.game-card:hover .game-card__image {
  transform: scale(1.04);
}

.game-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 13, 16, 0) 45%, rgba(14, 13, 16, 0.72));
  pointer-events: none;
}

/* 折扣徽标：与价格同一行的实心方块（Steam 价格块样式） */
.game-card__discount {
  flex: 0 0 auto;
  padding: 0.12rem 0.4rem;
  border-radius: 2px;
  background: #a3e635;
  color: #11150a;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.5;
}

.game-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  flex: 1;
}

.game-card__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text-strong);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.game-card__title a {
  color: inherit;
}

.game-card__title a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.game-card__heat {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

.game-card__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: auto;
}

.price-stack {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
}

.game-card__body > .price-stack {
  margin-top: auto;
}

.price-stack__current--empty {
  color: var(--color-muted) !important;
  font-size: 0.8125rem !important;
  font-weight: 500 !important;
}

.price-stack[data-region="none"] .price-stack__normal {
  display: none;
}

.price-stack__normal {
  color: var(--color-muted);
  font-size: 0.8125rem;
  text-decoration: line-through;
  text-decoration-color: rgba(133, 130, 138, 0.7);
}

.price-stack__current {
  color: var(--color-text-strong);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.game-card__actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.btn-primary,
.btn-outline {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-control);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast), opacity var(--transition-fast);
}

.btn-outline {
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.btn-outline:disabled {
  opacity: 0.55;
  cursor: progress;
}

.btn-primary {
  border: 1px solid transparent;
  background: var(--color-primary);
  color: #1a1206;
  font-weight: 600;
}

.btn-primary:hover {
  background: #f0a06c;
}

.btn-outline--link {
  flex: 0 0 auto;
  text-decoration: none;
}

/* 史低浮层 */
.history-panel {
  margin: 0 var(--space-4) var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: rgba(231, 138, 83, 0.06);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  animation: history-in 180ms ease-out;
}

@keyframes history-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.history-panel__row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0.15rem 0;
  color: var(--color-muted);
}

.history-panel__row b {
  color: var(--color-text-strong);
  font-weight: 600;
}

.history-panel__verdict {
  margin: var(--space-2) 0 0;
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-border-strong);
  color: var(--color-primary);
}

.history-panel__verdict--high {
  color: var(--color-danger);
}

.history-panel__note {
  margin: 0;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   States
   -------------------------------------------------------------------------- */
.state-loading {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
  gap: var(--space-4);
}

.skeleton-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  padding: 0 0 var(--space-4);
  overflow: hidden;
}

.skeleton-card__media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(90deg, #1b1a1f 25%, #24222a 50%, #1b1a1f 75%);
  background-size: 200% 100%;
  animation: shimmer 1.3s infinite linear;
}

.skeleton-card__line {
  height: 0.7rem;
  margin: var(--space-3) var(--space-4) 0;
  border-radius: var(--radius-pill);
  background: #1f1d24;
}

.skeleton-card__line--short {
  width: 45%;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

.state-error,
.state-empty {
  text-align: center;
  padding: var(--space-7) var(--space-4);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.state-error__title,
.state-empty__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--color-text-strong);
}

.state-error__message,
.state-empty__message {
  margin: 0 0 var(--space-4);
  color: var(--color-muted);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

@media (max-width: 640px) {
  .app-shell {
    padding: var(--space-5) var(--space-4) var(--space-6);
  }

  .control-bar {
    flex-direction: column;
  }

  .price-field {
    justify-content: space-between;
  }
}

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