* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--color-bg-page);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--color-text-primary);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), transparent 34%),
    linear-gradient(145deg, var(--color-bg-page), #d9ecff 45%, var(--color-bg-page));
  font-size: var(--font-md);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  letter-spacing: 0;
}

[data-theme="dark"] body {
  background:
    linear-gradient(140deg, rgba(102, 170, 255, 0.12), transparent 38%),
    linear-gradient(145deg, var(--color-bg-page), #0c1b30 58%, #07111f);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.page-stage {
  min-height: 100vh;
  padding: 24px;
}

.app-shell {
  width: min(1800px, 100%);
  min-height: calc(100vh - 48px);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  background: var(--color-bg-surface);
  box-shadow: var(--shadow-shell);
  backdrop-filter: var(--glass-blur);
}

.top-nav {
  display: grid;
  grid-template-columns: auto minmax(280px, 660px) auto;
  gap: 24px;
  align-items: center;
  min-height: 88px;
  padding: 18px 34px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-bg-surface-strong);
  backdrop-filter: var(--glass-blur);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-size: var(--font-xl);
  font-weight: 750;
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(4, 5px);
  gap: 3px;
  align-items: end;
  width: 40px;
  height: 40px;
  padding: 9px;
  border: 1px solid var(--color-border-strong);
  border-radius: 15px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.68), rgba(47, 134, 255, 0.14));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] .brand-mark {
  background: linear-gradient(145deg, rgba(102, 170, 255, 0.2), rgba(8, 18, 32, 0.72));
}

.brand-mark span {
  border-radius: var(--radius-full);
  background: linear-gradient(180deg, #9ed3ff, var(--color-accent));
}

.brand-mark span:nth-child(1) {
  height: 14px;
}

.brand-mark span:nth-child(2) {
  height: 22px;
}

.brand-mark span:nth-child(3) {
  height: 18px;
}

.brand-mark span:nth-child(4) {
  height: 26px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 52px;
  min-width: 0;
  padding: 0 16px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  background: var(--color-bg-control);
  color: var(--color-text-secondary);
}

.search-box input {
  min-width: 0;
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-text-primary);
}

.search-box kbd {
  flex: 0 0 auto;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-xs);
  padding: 3px 7px;
  color: var(--color-text-muted);
  font-size: var(--font-xs);
}

.nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.icon-button,
.glass-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border: 1px solid var(--color-border-soft);
  background: var(--color-bg-control);
  color: var(--color-text-primary);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
  backdrop-filter: var(--glass-blur);
}

.icon-button {
  width: 44px;
  border-radius: var(--radius-full);
}

.glass-button {
  padding: 0 16px;
  border-radius: var(--radius-full);
  font-weight: 650;
}

.icon-button:hover,
.glass-button:hover {
  transform: translateY(-1px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  border: 0;
  border-radius: var(--radius-full);
  padding: 0 20px;
  background: linear-gradient(135deg, #2f86ff, #66aaff);
  color: #fff;
  font-weight: 760;
  box-shadow: 0 14px 30px rgba(47, 134, 255, 0.28);
}

.avatar {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 800;
}

.shell-content {
  padding: 30px 34px 36px;
}

.page-grid {
  display: grid;
  gap: 24px;
}

.hero-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.glass-panel {
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  background: var(--color-bg-surface);
  box-shadow: var(--shadow-card);
  backdrop-filter: var(--glass-blur);
}

.hero-composer {
  min-height: 326px;
  padding: 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  color: var(--color-accent);
  font-size: var(--font-sm);
  font-weight: 750;
}

.hero-composer h1,
.page-title h1 {
  margin: 0;
  max-width: 780px;
  font-size: var(--font-3xl);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-composer p,
.page-title p {
  margin: 14px 0 0;
  max-width: 720px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.prompt-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  margin-top: 26px;
}

.prompt-bar textarea,
.field textarea,
.field input,
.field select {
  width: 100%;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface-strong);
  color: var(--color-text-primary);
  outline: 0;
}

.prompt-bar textarea {
  min-height: 96px;
  resize: vertical;
  padding: 15px 16px;
}

.quick-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-full);
  background: var(--color-bg-control);
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
  font-weight: 650;
}

.feature-preview {
  position: relative;
  min-height: 326px;
  overflow: hidden;
}

.feature-preview img {
  width: 100%;
  height: 100%;
  min-height: 326px;
  object-fit: cover;
}

.preview-metadata {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: var(--radius-md);
  background: rgba(4, 10, 18, 0.48);
  color: #fff;
  backdrop-filter: blur(18px);
}

.category-rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 2px 0 8px;
  scrollbar-width: thin;
}

.category-pill {
  flex: 0 0 auto;
  min-height: 42px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-full);
  padding: 0 16px;
  background: var(--color-bg-control);
  color: var(--color-text-secondary);
  font-weight: 650;
}

.category-pill.active {
  border-color: var(--color-border-strong);
  background: var(--color-bg-control-active);
  color: var(--color-accent);
}

.wallpaper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
}

.wallpaper-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 260px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
  box-shadow: var(--shadow-card);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.wallpaper-card:hover,
.wallpaper-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-floating);
}

.wallpaper-card img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  transition: transform 180ms ease;
}

.wallpaper-card:hover img {
  transform: scale(1.02);
}

.wallpaper-card.portrait {
  grid-row: span 2;
}

.wallpaper-card.portrait img,
.wallpaper-card.portrait {
  min-height: 520px;
}

.card-badge,
.card-more,
.card-stats,
.card-actions {
  position: absolute;
  z-index: 2;
}

.card-badge {
  top: 12px;
  left: 12px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.58);
  color: #172235;
  font-size: var(--font-xs);
  font-weight: 850;
  backdrop-filter: blur(14px);
}

.card-more {
  top: 10px;
  right: 10px;
}

.card-stats {
  right: 12px;
  bottom: 12px;
  left: 12px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-sm);
  background: rgba(4, 10, 18, 0.52);
  color: #fff;
  font-size: var(--font-sm);
  backdrop-filter: blur(16px);
}

.card-actions {
  top: 50%;
  left: 50%;
  display: flex;
  gap: 10px;
  opacity: 0;
  transform: translate(-50%, -44%);
  transition: opacity 180ms ease, transform 180ms ease;
}

.wallpaper-card:hover .card-actions,
.wallpaper-card:focus-within .card-actions {
  opacity: 1;
  transform: translate(-50%, -50%);
}

.floating-action {
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.28);
  color: #fff;
  backdrop-filter: blur(18px);
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-heading h2 {
  margin: 0;
  font-size: var(--font-xl);
}

.section-heading p {
  margin: 5px 0 0;
  color: var(--color-text-secondary);
}

.form-layout {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr) minmax(280px, 340px);
  gap: 22px;
  align-items: start;
}

.panel-pad {
  padding: 22px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.field label {
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
  font-weight: 700;
}

.field textarea {
  min-height: 132px;
  resize: vertical;
  padding: 13px 14px;
}

.field input,
.field select {
  height: 46px;
  padding: 0 13px;
}

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
}

.segmented button {
  min-height: 38px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  font-weight: 700;
}

.segmented button.active {
  background: var(--color-bg-control-active);
  color: var(--color-accent);
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 48px;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
}

.switch-row input {
  width: 18px;
  height: 18px;
}

.result-pair {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(180px, 0.75fr);
  gap: 18px;
  align-items: start;
}

.result-frame {
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
}

.result-frame.landscape {
  aspect-ratio: 16 / 9;
}

.result-frame.portrait {
  aspect-ratio: 9 / 16;
}

.result-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.task-list {
  display: grid;
  gap: 12px;
}

.task-item {
  display: grid;
  gap: 8px;
  padding: 13px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
}

.status-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
}

.score {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-success);
  font-weight: 800;
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 24px;
  align-items: stretch;
}

.auth-art {
  position: relative;
  overflow: hidden;
  min-height: 560px;
}

.auth-art img {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
}

.settings-layout {
  display: grid;
  grid-template-columns: minmax(320px, 460px) minmax(0, 1fr);
  gap: 22px;
}

.key-row {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  background: var(--color-bg-control);
}

.footer-note {
  margin-top: 24px;
  color: var(--color-text-muted);
  font-size: var(--font-sm);
}

@media (min-width: 1600px) {
  .wallpaper-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 26px;
  }
}

@media (max-width: 1199px) {
  .hero-strip,
  .form-layout,
  .auth-layout,
  .settings-layout {
    grid-template-columns: 1fr;
  }

  .form-layout {
    align-items: stretch;
  }
}

@media (max-width: 899px) {
  .page-stage {
    padding: 0;
  }

  .app-shell {
    min-height: 100vh;
    border-width: 0;
    border-radius: 0;
  }

  .top-nav {
    grid-template-columns: 1fr auto;
    gap: 14px;
    min-height: 64px;
    padding: 12px 16px;
  }

  .top-nav .search-box {
    grid-column: 1 / -1;
    height: 48px;
  }

  .shell-content {
    padding: 18px 16px 28px;
  }

  .nav-actions .glass-button span,
  .search-box kbd {
    display: none;
  }

  .hero-composer {
    padding: 20px;
  }

  .hero-composer h1,
  .page-title h1 {
    font-size: var(--font-2xl);
  }

  .prompt-bar {
    grid-template-columns: 1fr;
  }

  .wallpaper-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .wallpaper-card.portrait,
  .wallpaper-card.portrait img {
    min-height: 440px;
  }

  .result-pair {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 479px) {
  .brand {
    font-size: var(--font-lg);
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    padding: 8px;
  }

  .hero-composer h1,
  .page-title h1 {
    font-size: 25px;
  }

  .preview-metadata,
  .section-heading,
  .status-line {
    align-items: flex-start;
    flex-direction: column;
  }

  .auth-art,
  .auth-art img {
    min-height: 360px;
  }
}