:root {
  color-scheme: light dark;
  --font-sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --page-bg: radial-gradient(circle at top, #1e293b 0%, #020617 60%);
  --body-max-width: 1240px;
  --surface: rgba(15, 23, 42, 0.9);
  --surface-soft: rgba(30, 41, 59, 0.78);
  --border: rgba(148, 163, 184, 0.3);
  --border-strong: rgba(148, 163, 184, 0.5);
  --text-primary: #e2e8f0;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --primary-strong: rgba(56, 189, 248, 0.9);
  --primary-soft: rgba(56, 189, 248, 0.16);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.18);
  --success: #34d399;
  --warning: #facc15;
  --card-shadow: 0 30px 60px rgba(15, 23, 42, 0.45);
  --space-section-gap: clamp(16px, 2.1vw, 24px);
  --space-card-padding: clamp(18px, 2.4vw, 26px);
  --space-control-gap: 12px;
  --space-meta-gap: 10px;
  --space-header-gap: 14px;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--page-bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 28px 16px 56px;
  background-attachment: fixed;
}

.app-shell {
  width: min(var(--body-max-width), 100%);
  display: grid;
  gap: var(--space-section-gap);
}

header.page-header {
  grid-column: 1 / -1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 26px;
  padding: var(--space-card-padding);
  backdrop-filter: blur(18px);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-header-gap);
  justify-content: space-between;
  align-items: flex-start;
}

.page-header h1 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 42px);
  letter-spacing: 0.02em;
}

.page-header p {
  margin: 6px 0 0;
  max-width: 540px;
  color: var(--text-muted);
  line-height: 1.6;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: rgba(15, 23, 42, 0.6);
  transition: border-color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  border-color: rgba(56, 189, 248, 0.6);
  transform: translateY(-2px);
}

.nav-links a.is-disabled {
  opacity: 0.45;
  pointer-events: none;
  cursor: not-allowed;
}

.panel,
.card-surface {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: var(--space-card-padding);
  backdrop-filter: blur(12px);
  box-shadow: 0 24px 40px rgba(15, 23, 42, 0.35);
}

.panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-section-gap);
}

.panel h2 {
  margin: 0;
  font-size: clamp(18px, 2vw, 20px);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.panel > p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.muted {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.65;
}

.form-grid {
  display: grid;
  gap: var(--space-section-gap);
}

.grid-two {
  display: grid;
  gap: var(--space-section-gap);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
}

input,
select,
textarea,
button {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.72);
  color: var(--text-primary);
  padding: 12px 16px;
  font-size: 15px;
  line-height: 1.45;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease, background 0.2s ease;
}

input,
select,
textarea {
  width: 100%;
}

textarea {
  resize: vertical;
  min-height: 140px;
}

select:focus,
textarea:focus,
input:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.8);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-control-gap);
  align-items: center;
}

.button-row > :first-child:last-child {
  margin-right: auto;
}

.panel-header,
.panel-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-control-gap);
}

.panel-footer {
  align-items: center;
  padding-top: 2px;
}

.panel-header__meta,
.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-meta-gap);
  color: var(--text-muted);
  font-size: 13px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-control-gap);
}

.cta-group a,
.cta-group button {
  order: 2;
}

.cta-group .cta-primary {
  order: 1;
}

button {
  cursor: pointer;
  border: none;
  background: linear-gradient(135deg, var(--primary-strong), rgba(59, 130, 246, 0.9));
  color: #0b1120;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.3);
  min-height: 44px;
  min-width: 140px;
}

button.secondary {
  background: rgba(30, 41, 59, 0.85);
  color: var(--text-primary);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: none;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 140px;
  padding: 10px 16px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--primary-strong), rgba(59, 130, 246, 0.9));
  color: #0b1120;
}

.button-link.secondary {
  background: rgba(30, 41, 59, 0.85);
  color: var(--text-primary);
  border-color: rgba(148, 163, 184, 0.35);
}

button:active {
  transform: translateY(1px);
}

button:hover:not(:disabled),
.button-link:hover,
.nav-links a:hover {
  filter: brightness(1.06);
}

button:disabled,
.button-link[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(125, 211, 252, 0.95);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.status-banner {
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid rgba(56, 189, 248, 0.4);
  background: rgba(56, 189, 248, 0.08);
  font-size: 14px;
  line-height: 1.6;
}

.status-banner.success {
  border-color: rgba(56, 189, 248, 0.4);
  background: rgba(56, 189, 248, 0.1);
}

.status-banner.error {
  border-color: rgba(248, 113, 113, 0.4);
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
}

.result-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-card {
  background: rgba(15, 23, 42, 0.65);
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.34);
  padding: 18px;
}

.result-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
}

.result-card pre {
  margin: 0;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-muted);
}

.response-pre {
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
  background: rgba(15, 23, 42, 0.55);
  border-radius: 12px;
  padding: 14px 18px;
  border: 1px solid rgba(56, 189, 248, 0.25);
  margin-top: 12px;
}

.tag-chip,
.pill,
.insight-chip {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  background: var(--primary-soft);
  color: var(--text-primary);
  font-size: 13px;
  letter-spacing: 0.01em;
}

.pill-list,
.insights {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-list {
  display: grid;
  gap: var(--space-section-gap);
}

.card-list .card-surface {
  display: grid;
  gap: var(--space-control-gap);
}

@media (max-width: 1100px) {
  :root {
    --body-max-width: 1100px;
  }
}

@media (max-width: 900px) {
  .grid-two {
    grid-template-columns: 1fr;
  }
}

.ui-empty-state {
  border: 1px dashed rgba(148, 163, 184, 0.45);
  border-radius: 16px;
  padding: 16px;
  background: rgba(15, 23, 42, 0.45);
  display: grid;
  gap: 10px;
}

.ui-empty-state h3 {
  margin: 0;
  font-size: 16px;
}

.ui-empty-state p {
  margin: 0;
}

.ui-empty-state__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ui-skeleton {
  width: 100%;
  height: 16px;
  border-radius: 10px;
  background: linear-gradient(90deg, rgba(51, 65, 85, 0.65) 0%, rgba(100, 116, 139, 0.55) 45%, rgba(51, 65, 85, 0.65) 100%);
  background-size: 220% 100%;
  animation: ui-skeleton 1.25s ease-in-out infinite;
}

@keyframes ui-skeleton {
  0% { background-position: 100% 0; }
  100% { background-position: -120% 0; }
}

@media (max-width: 768px) {
  body {
    padding: 22px 12px 44px;
  }

  header.page-header {
    padding: 20px;
  }

  .panel {
    padding: 18px;
  }
}