:root {
  --bg: #f6f7fb;
  --paper: rgba(255, 255, 255, 0.92);
  --ink: #171411;
  --subtle: #645a4f;
  --line: rgba(41, 31, 21, 0.12);
  --accent: #2b63ff;
  --accent-dark: #1746c8;
  --accent-soft: rgba(43, 99, 255, 0.1);
  --teal: #3c5a9a;
  --teal-soft: rgba(60, 90, 154, 0.08);
  --success: #22744c;
  --danger: #b04033;
  --shadow: 0 24px 70px rgba(34, 52, 108, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(43, 99, 255, 0.1), transparent 24%),
    radial-gradient(circle at 85% 12%, rgba(137, 187, 255, 0.18), transparent 18%),
    linear-gradient(180deg, #fbfcff 0%, #f3f6fc 50%, #eef3fb 100%);
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.page-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 28px;
}

.topbar,
.panel {
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--paper);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 400px);
  gap: 24px;
  padding: 32px;
  margin-bottom: 24px;
  overflow: hidden;
  position: relative;
}

.topbar::before {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 99, 255, 0.18), transparent 68%);
  pointer-events: none;
}

.brand-block,
.topbar-side {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker,
.mini-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--teal);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 74px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero-copy {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--subtle);
  line-height: 1.8;
  font-size: 16px;
}

.hero-suggestions {
  margin-top: 28px;
}

.section-head {
  margin-bottom: 16px;
}

.section-head h2 {
  margin: 0;
  font-size: 28px;
}

.prompt-presets {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.preset-card {
  display: grid;
  gap: 8px;
  padding: 18px;
  text-align: left;
  border-radius: 24px;
  border: 1px solid rgba(41, 31, 21, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(246, 249, 255, 0.95));
  box-shadow: 0 12px 30px rgba(34, 52, 108, 0.05);
}

.preset-card strong {
  font-size: 18px;
}

.preset-card span {
  color: var(--subtle);
  line-height: 1.5;
}

.preset-card:hover {
  transform: translateY(-2px);
}

.preset-tag {
  display: inline-flex;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
}

.topbar-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.mini-panel {
  padding: 18px 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(41, 31, 21, 0.08);
}

.mini-panel.wide p {
  margin: 0;
  line-height: 1.7;
  color: var(--subtle);
}

.inspiration-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-chip {
  border: 1px solid rgba(41, 31, 21, 0.12);
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  border-radius: 999px;
  padding: 9px 14px;
}

.tag-chip:hover,
.text-button:hover,
.preset-card:hover,
button:hover {
  transform: translateY(-1px);
}

.workspace {
  display: grid;
  gap: 24px;
}

.panel {
  padding: 30px;
}

.panel-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.panel-header h2,
.settings-header h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.1;
}

.panel-tip {
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 13px;
  white-space: nowrap;
}

.composer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 360px);
  gap: 22px;
}

.prompt-stack,
.settings-card {
  border-radius: 24px;
  border: 1px solid rgba(41, 31, 21, 0.08);
}

.prompt-stack {
  padding: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(246, 249, 255, 0.92));
}

.settings-card {
  padding: 22px;
  background: linear-gradient(180deg, rgba(43, 99, 255, 0.05), rgba(255, 255, 255, 0.88));
}

.settings-header {
  margin-bottom: 18px;
}

.settings-header p {
  margin: 8px 0 0;
  color: var(--subtle);
  line-height: 1.6;
}

.settings-grid {
  display: grid;
  gap: 16px;
}

form,
.field {
  display: grid;
  gap: 10px;
}

.field span {
  font-size: 14px;
  font-weight: 700;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid rgba(41, 31, 21, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.prompt-field textarea {
  min-height: 220px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: rgba(43, 99, 255, 0.75);
  box-shadow: 0 0 0 4px rgba(43, 99, 255, 0.12);
  transform: translateY(-1px);
}

.quick-tools {
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(43, 99, 255, 0.05);
  border: 1px solid rgba(43, 99, 255, 0.08);
}

.quick-tools-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.quick-tools-head span {
  font-size: 14px;
  font-weight: 700;
}

.quick-tools p {
  margin: 0;
  color: var(--subtle);
  line-height: 1.6;
  font-size: 14px;
}

.text-button {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--accent-dark);
  cursor: pointer;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}

button {
  border: none;
  border-radius: 999px;
  padding: 14px 22px;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

#submitButton {
  min-width: 150px;
  background: linear-gradient(135deg, var(--accent) 0%, #d57c43 100%);
  color: #fff;
  box-shadow: 0 18px 30px rgba(187, 90, 40, 0.22);
}

.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(41, 31, 21, 0.14);
}

.status-badge,
.result-meta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13px;
  white-space: nowrap;
}

.status-badge {
  color: #fff;
}

.status-badge.idle {
  background: #67707b;
}

.status-badge.loading {
  background: var(--accent);
}

.status-badge.success {
  background: var(--success);
}

.status-badge.error {
  background: var(--danger);
}

.result-meta {
  background: var(--teal-soft);
  color: var(--teal);
}

.message-box {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: 18px;
  line-height: 1.7;
}

.message-box.error {
  background: rgba(176, 64, 51, 0.08);
  color: var(--danger);
}

.message-box.success {
  background: rgba(34, 116, 76, 0.08);
  color: var(--success);
}

.hidden {
  display: none !important;
}

.loading-state {
  display: grid;
  place-items: center;
  min-height: 180px;
  border: 1px dashed rgba(41, 31, 21, 0.16);
  border-radius: 24px;
  color: var(--subtle);
  background: rgba(255, 255, 255, 0.5);
}

.spinner {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 4px solid rgba(187, 90, 40, 0.18);
  border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.gallery.empty {
  grid-template-columns: 1fr;
}

.empty-state {
  min-height: 220px;
  display: grid;
  place-items: center;
  border: 1px dashed rgba(41, 31, 21, 0.16);
  border-radius: 24px;
  color: var(--subtle);
  background: rgba(255, 255, 255, 0.46);
}

.image-card {
  overflow: hidden;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(41, 31, 21, 0.1);
  box-shadow: 0 18px 50px rgba(72, 47, 18, 0.08);
}

.image-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.image-card .card-body {
  padding: 14px 16px 18px;
}

.image-card .card-title {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
}

.image-card .card-caption {
  margin: 0 0 14px;
  color: var(--subtle);
  line-height: 1.6;
  font-size: 13px;
}

.image-card .card-actions {
  display: flex;
  gap: 10px;
}

.image-card .card-actions a,
.image-card .card-actions button {
  flex: 1;
  text-align: center;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 13px;
}

.image-card .card-actions a {
  background: var(--teal);
  color: #fff;
}

.image-card .card-actions button {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 1180px) {
  .topbar,
  .composer-layout,
  .prompt-presets {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .page-shell {
    padding: 16px;
  }

  .topbar,
  .panel,
  .prompt-stack,
  .settings-card {
    padding: 20px;
    border-radius: 24px;
  }

  .panel-header,
  .quick-tools-head {
    align-items: start;
    flex-direction: column;
  }

  .actions,
  .image-card .card-actions {
    flex-direction: column;
  }

  button,
  .image-card .card-actions a,
  .image-card .card-actions button {
    width: 100%;
  }
}