/* Dynatech frontend design system — prompt-refiner */
:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-2: #fafafa;
  --fg: #0a0a0a;
  --fg-2: #4d4d4d;
  --muted: #666666;
  --line: #eaeaea;
  --line-2: #d4d4d4;
  --hover: #f5f5f5;
  --focus: #0068d6;
  --chip: #f2f2f2;
  --grid: rgba(0, 0, 0, 0.045);
  --sans: "Geist", "PingFang HK", "PingFang TC", "Noto Sans HK", "Noto Sans TC",
    "Noto Sans CJK HK", "Noto Sans CJK TC", "Microsoft JhengHei", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Noto Sans Mono CJK HK",
    monospace;
  --radius: 8px;
  --wrap: 1080px;
  --read: 42rem;
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --bg-2: #111111;
    --fg: #ededed;
    --fg-2: #c7c7c7;
    --muted: #a1a1a1;
    --line: #262626;
    --line-2: #3d3d3d;
    --hover: #161616;
    --focus: #52a8ff;
    --chip: #1c1c1c;
    --grid: rgba(255, 255, 255, 0.05);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--fg);
  color: var(--bg);
  font-size: 0.875rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

html {
  scroll-padding-top: 4.5rem;
}

body.dynatech-app {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  line-break: strict;
  -webkit-font-smoothing: antialiased;
}

body.dynatech-app .text-ink,
body.dynatech-app .text-slate-600,
body.dynatech-app .text-slate-500,
body.dynatech-app .text-slate-700,
body.dynatech-app .text-gray-500,
body.dynatech-app .text-gray-600,
body.dynatech-app .text-gray-700,
body.dynatech-app .text-gray-800 {
  color: inherit;
}

body.dynatech-app .text-slate-500,
body.dynatech-app .text-gray-500,
body.dynatech-app .form-section-desc,
body.dynatech-app .form-hint {
  color: var(--muted) !important;
}

body.dynatech-app .text-slate-600,
body.dynatech-app .text-gray-600 {
  color: var(--fg-2) !important;
}

/* Top bar */
.site-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 60px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
}

@media (max-width: 720px) {
  .site-topbar {
    height: 56px;
  }
}

.site-topbar .topbar-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

@media (max-width: 720px) {
  .site-topbar .topbar-inner {
    padding: 0 16px;
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--fg);
  min-width: 0;
}

/* dynatech_logo_0.png native ~2620×2542 (≈1.03:1) — display at intrinsic aspect, no upscale */
.brand .logo {
  height: 24px;
  width: auto;
  max-height: 28px;
  aspect-ratio: 2620 / 2542;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

.brand-text {
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-by {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.8125rem;
  margin-left: 0.25rem;
}

.topbar-nav {
  display: none;
  align-items: center;
  gap: 0.125rem;
}

@media (min-width: 768px) {
  .topbar-nav {
    display: flex;
  }
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 6px;
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-link:hover {
  color: var(--fg);
  background: var(--hover);
}

.nav-link[aria-current="page"] {
  color: var(--fg);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg);
  background: transparent;
}

@media (min-width: 768px) {
  .topbar-mobile-toggle {
    display: none;
  }
}

.mobile-drawer {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--bg);
  padding: 0.5rem 16px 1rem;
}

.mobile-drawer.is-open {
  display: block;
}

@media (min-width: 768px) {
  .mobile-drawer {
    display: none !important;
  }
}

.mobile-drawer .nav-link {
  display: block;
  padding: 0.65rem 0.5rem;
}

.mobile-drawer .tools-menu-trigger {
  display: inline-flex;
  align-items: center;
  width: auto;
}

/* Tools menu */
.tools-menu {
  position: relative;
}

.tools-menu-trigger {
  display: inline-flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.25rem;
  border: none;
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.875rem;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}

.tools-menu-trigger:hover,
.tools-menu-open .tools-menu-trigger {
  color: var(--fg);
  background: var(--hover);
}

.tools-menu-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tools-menu-chevron {
  font-size: 0.6rem;
  color: var(--muted);
  transition: transform 0.15s ease;
  line-height: 1;
}

.tools-menu-open .tools-menu-chevron {
  transform: rotate(180deg);
}

.tools-menu-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  min-width: 17rem;
  max-width: min(22rem, 92vw);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: none;
  z-index: 60;
  padding: 0;
  overflow: hidden;
}

.tools-menu-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0;
  text-decoration: none;
  color: var(--fg);
  transition: background 0.15s ease;
  border-bottom: 1px solid var(--line);
}

.tools-menu-item:last-child {
  border-bottom: none;
}

.tools-menu-item:hover,
.tools-menu-item:focus-visible {
  background: var(--hover);
}

.tools-menu-item[aria-current="page"] {
  background: var(--chip);
}

.tools-menu-item-name {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.3;
}

.tools-menu-ext {
  font-size: 0.7rem;
  color: var(--muted);
  line-height: 1;
}

.tools-menu-item .link-external::after {
  content: none;
}

.tools-menu-item-desc {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

.link-external::after {
  content: " ↗";
  font-size: 0.75em;
}

/* Language toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.125rem;
  padding: 0.125rem;
  border-radius: var(--radius);
  background: var(--chip);
  border: 1px solid var(--line);
}

.lang-btn {
  min-width: 2rem;
  padding: 0.25rem 0.45rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--mono);
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}

.lang-btn:hover {
  color: var(--fg);
}

.lang-btn-active {
  background: var(--fg);
  color: var(--bg);
  box-shadow: none;
}

.lang-btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* Hero */
.hero-section {
  padding-top: calc(60px + 3.5rem);
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, black 0%, transparent 70%);
}

@media (max-width: 720px) {
  .hero-section {
    padding-top: calc(56px + 2.5rem);
    padding-bottom: 2.5rem;
  }
}

.hero-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  text-align: center;
}

@media (max-width: 720px) {
  .hero-inner {
    padding: 0 16px;
  }
}

.hero-kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw + 0.5rem, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  text-wrap: pretty;
  color: var(--fg);
  max-width: var(--read);
  margin: 0 auto 1rem;
}

.hero-lede {
  font-size: 1.0625rem;
  color: var(--fg-2);
  max-width: 36rem;
  margin: 0 auto 1.75rem;
  text-wrap: pretty;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1.15rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--line-2);
}

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

/* Sections */
.page-section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 720px) {
  .page-section {
    padding: 2.5rem 0;
  }
}

.section-wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 720px) {
  .section-wrap {
    padding: 0 16px;
  }
}

.section-wrap-narrow {
  max-width: var(--read);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 0.35rem;
}

.section-lede {
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Refiner panel */
.refiner-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  box-shadow: none !important;
}

.refiner-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  padding: 0 0.25rem;
}

.refiner-tabs .tab-button {
  color: var(--muted) !important;
  border-bottom: 2px solid transparent !important;
  border-radius: 0;
}

.refiner-tabs .tab-button.active {
  color: var(--fg) !important;
  border-bottom-color: var(--fg) !important;
}

.refiner-tabs .tab-button:not(.active):hover {
  color: var(--fg) !important;
  background: var(--hover);
}

/* Forms */
body.dynatech-app .form-section {
  border: 1px solid var(--line) !important;
  border-radius: var(--radius) !important;
  background: var(--bg) !important;
  box-shadow: none !important;
}

body.dynatech-app .form-input,
body.dynatech-app .form-input-lg {
  border-color: var(--line-2) !important;
  background: var(--bg) !important;
  color: var(--fg) !important;
  border-radius: var(--radius) !important;
}

body.dynatech-app .form-input:focus,
body.dynatech-app .form-input-lg:focus {
  outline: none;
  border-color: var(--fg) !important;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--focus) 35%, transparent) !important;
}

body.dynatech-app .bg-primary,
body.dynatech-app button.bg-primary,
body.dynatech-app .hover\:bg-primary-600:hover,
body.dynatech-app .hover\:bg-primary-700:hover {
  background-color: var(--fg) !important;
  color: var(--bg) !important;
}

body.dynatech-app .text-primary,
body.dynatech-app .text-primary-600,
body.dynatech-app .text-primary-700,
body.dynatech-app .text-primary-800 {
  color: var(--fg) !important;
}

body.dynatech-app .border-primary-100,
body.dynatech-app .border-primary-600,
body.dynatech-app .border-gray-200,
body.dynatech-app .border-gray-300,
body.dynatech-app .border-slate-300 {
  border-color: var(--line) !important;
}

body.dynatech-app .bg-primary-50,
body.dynatech-app .bg-primary-50\/40,
body.dynatech-app .bg-primary-50\/60,
body.dynatech-app .bg-gray-50 {
  background: var(--bg-2) !important;
}

body.dynatech-app .hover\:bg-primary-50:hover,
body.dynatech-app .hover\:border-primary-400:hover {
  background: var(--hover) !important;
  border-color: var(--line-2) !important;
}

body.dynatech-app .shadow-lg,
body.dynatech-app .shadow-md,
body.dynatech-app .shadow-sm,
body.dynatech-app .hover\:shadow-lg:hover,
body.dynatech-app .hover\:shadow-xl:hover {
  box-shadow: none !important;
}

.guide-progress {
  height: 0.35rem;
  background: var(--chip);
  border-radius: 999px;
  overflow: hidden;
}

.guide-progress-fill {
  height: 100%;
  background: var(--fg);
  transition: width 0.35s ease;
}

.purpose-chip,
.format-chip {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.15s, background 0.15s;
}

.purpose-chip:hover,
.format-chip:hover {
  border-color: var(--line-2);
  background: var(--hover);
  transform: none;
}

.purpose-chip:has(input:checked),
.format-chip:has(input:checked) {
  border-color: var(--fg);
  background: var(--chip);
  box-shadow: none;
}

.guide-preview-box {
  background: var(--bg-2);
  border: 1px dashed var(--line-2);
  border-radius: var(--radius);
  color: var(--fg);
}

.resource-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.resource-card:hover {
  transform: none;
  border-color: var(--line-2);
  background: var(--hover);
  box-shadow: none;
}

.resource-card-tag {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--chip);
  border: 1px solid var(--line);
}

.resource-card-title {
  color: var(--fg);
}

.resource-card-desc {
  color: var(--muted);
}

.resource-card-link {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
}

.score-good {
  background: var(--chip);
  color: var(--fg);
}

.score-bar-fill.score-good {
  background: var(--fg);
}

.beginner-feedback {
  background: var(--bg-2);
  border: 1px solid var(--line);
}

.beginner-feedback-band {
  color: var(--fg);
}

/* Footer */
.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--line);
  background: var(--bg);
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer .footer-brand {
  font-weight: 600;
  color: var(--fg);
  font-size: 1rem;
}

.footer-tools-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 0.5rem;
}

.footer-tools-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem 0.5rem;
  margin-bottom: 1.5rem;
}

.footer-tools-link {
  color: var(--fg-2);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
  font-size: 0.875rem;
}

.footer-tools-link:hover {
  color: var(--fg);
}

.footer-tools-link[aria-current="page"] {
  color: var(--fg);
  font-weight: 600;
}

.footer-tools-sep {
  color: var(--line-2);
}

.footer-disclaimer {
  max-width: var(--read);
  margin: 0 auto 1.5rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  color: var(--muted);
}

.footer-disclaimer strong {
  color: var(--fg);
  display: block;
  margin-bottom: 0.35rem;
}

.footer-meta {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

.footer-meta a {
  color: var(--fg-2);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
}

.footer-meta a:hover {
  color: var(--fg);
}

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

.hide-sm {
  display: inline;
}

@media (max-width: 720px) {
  .hide-sm {
    display: none;
  }
}

/* Kill legacy hero gradient */
.hero-surface {
  background: var(--bg) !important;
}

body.dynatech-app {
  background: var(--bg) !important;
}

/* --- Merged main markup: token sweep (loads after Tailwind) --- */
body.dynatech-app .bg-white,
body.dynatech-app .bg-white\/90,
body.dynatech-app .bg-white\/95,
body.dynatech-app .refiner-panel,
body.dynatech-app #refiner .refiner-panel .p-6,
body.dynatech-app #refiner .refiner-panel .p-8,
body.dynatech-app #refiner .form-section,
body.dynatech-app #refiner .purpose-chip,
body.dynatech-app #refiner .format-chip {
  background-color: var(--bg) !important;
}

body.dynatech-app #refiner .purpose-chip:has(input:checked),
body.dynatech-app #refiner .format-chip:has(input:checked) {
  background-color: var(--chip) !important;
}

body.dynatech-app #learning.bg-white,
body.dynatech-app #features,
body.dynatech-app #resources {
  background-color: var(--bg) !important;
}

body.dynatech-app .text-primary,
body.dynatech-app .text-primary-400,
body.dynatech-app .text-primary-600,
body.dynatech-app .text-primary-700,
body.dynatech-app .text-primary-800,
body.dynatech-app .text-primary-900,
body.dynatech-app .form-section-title,
body.dynatech-app .form-section-title .fa,
body.dynatech-app summary {
  color: var(--fg) !important;
}

body.dynatech-app .text-gray-500,
body.dynatech-app .text-gray-600,
body.dynatech-app .text-gray-700,
body.dynatech-app .text-gray-800,
body.dynatech-app .text-slate-500,
body.dynatech-app .text-slate-600 {
  color: var(--muted) !important;
}

body.dynatech-app .text-ink {
  color: var(--fg) !important;
}

body.dynatech-app [class*="bg-primary-50"],
body.dynatech-app .assistant-optional-details {
  background-color: var(--bg-2) !important;
}

body.dynatech-app .bg-primary-100 {
  background-color: var(--chip) !important;
}

body.dynatech-app .border-primary-100,
body.dynatech-app .border-primary-200 {
  border-color: var(--line) !important;
}

body.dynatech-app .hover\:bg-gray-50:hover,
body.dynatech-app .hover\:bg-slate-50:hover {
  background-color: var(--hover) !important;
}

body.dynatech-app #results .rounded-2xl,
body.dynatech-app #results .bg-white,
body.dynatech-app #results pre {
  background-color: var(--bg) !important;
  color: var(--fg) !important;
}

body.dynatech-app #results .rounded-2xl.border {
  background-color: var(--bg-2) !important;
}

body.dynatech-app #loadingState .border-primary {
  border-color: var(--fg) !important;
}

body.dynatech-app #refineAgainButton {
  background-color: var(--bg) !important;
  color: var(--fg) !important;
  border-color: var(--line-2) !important;
  box-shadow: none !important;
}

body.dynatech-app #refineAgainButton:hover {
  background-color: var(--hover) !important;
}

body.dynatech-app .learning-tab {
  color: var(--muted) !important;
  border-color: transparent !important;
}

body.dynatech-app .learning-tab.active,
body.dynatech-app .learning-tab:hover {
  color: var(--fg) !important;
}

body.dynatech-app .learning-tab.active {
  border-bottom-color: var(--fg) !important;
}

body.dynatech-app .learning-content .bg-white,
body.dynatech-app .learning-content .shadow-lg {
  background-color: var(--bg) !important;
  box-shadow: none !important;
  border: 1px solid var(--line);
}

body.dynatech-app .learning-content [class*="bg-primary-50"] {
  background-color: var(--bg-2) !important;
}

body.dynatech-app .learning-content [class*="text-primary-"] {
  color: var(--fg-2) !important;
}

body.dynatech-app .learning-content h3,
body.dynatech-app .learning-content h4 {
  color: var(--fg) !important;
}

body.dynatech-app #features .bg-white\/90 {
  background-color: var(--bg) !important;
  border-color: var(--line) !important;
  box-shadow: none !important;
}

/* Hero CTAs: monochrome inverted primary */
.hero-section .btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.hero-section .btn-primary:hover {
  opacity: 0.9;
}

.hero-section .btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--line-2);
}

.hero-section .btn-secondary:hover {
  background: var(--hover);
}

@media (prefers-color-scheme: dark) {
  .hero-section .btn-primary {
    background: var(--fg);
    color: var(--bg);
  }
}