:root {
  --color-bg: #ffffff;
  --color-bg-elevated: #f5f5f8;
  --color-bg-soft: #f9fafb;
  --color-border-subtle: #e2e4ea;
  --color-border-strong: #c0c4d4;
  --color-text: #111827;
  --color-text-soft: #4b5563;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-soft: rgba(37, 99, 235, 0.08);
  --color-primary-strong: #1d4ed8;
  --color-accent: #10b981;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.1);
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.06);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-full: 999px;
  --transition-fast: 150ms ease-out;
  --transition-med: 200ms ease-out;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Dark mode overrides */
[data-theme="dark"] {
  --color-bg: #020617;
  --color-bg-elevated: #020617;
  --color-bg-soft: #020617;
  --color-border-subtle: #1f2937;
  --color-border-strong: #374151;
  --color-text: #e5e7eb;
  --color-text-soft: #d1d5db;
  --color-text-muted: #9ca3af;
  --color-primary: #60a5fa;
  --color-primary-soft: rgba(96, 165, 250, 0.12);
  --color-primary-strong: #3b82f6;
  --color-accent: #34d399;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --shadow-subtle: 0 1px 3px rgba(15, 23, 42, 0.7);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top left, #eff6ff 0, transparent 50%),
    radial-gradient(circle at bottom right, #fef3c7 0, transparent 55%),
    var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 280ms ease-out, color var(--transition-med);
}

[data-theme="dark"] body {
  background: radial-gradient(circle at top left, #1f2937 0, transparent 50%),
    radial-gradient(circle at bottom right, #111827 0, transparent 55%),
    var(--color-bg);
}

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

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background-color: color-mix(in srgb, var(--color-bg) 86%, transparent);
  border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.75rem;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 1rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: white;
  box-shadow: var(--shadow-subtle);
}

.logo-text {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  color: var(--color-text-muted);
  font-size: 0.93rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

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

.nav-link-active {
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  color: #f9fafb;
  box-shadow: var(--shadow-subtle);
}

.nav-link-active:hover {
  color: #f9fafb;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.25rem;
  border-radius: 999px;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  display: block;
  margin: 3px 0;
}

.theme-toggle {
  border-radius: 999px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  position: relative;
  overflow: hidden;
  transition: background var(--transition-fast), border-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

.theme-icon {
  position: absolute;
  opacity: 0;
  transform: scale(0.85) translateY(6px);
  transition: opacity var(--transition-med), transform var(--transition-med);
}

.theme-icon-sun {
  color: #fbbf24;
}

.theme-icon-moon {
  color: #bfdbfe;
}

[data-theme="light"] .theme-icon-sun,
html:not([data-theme]) .theme-icon-sun {
  opacity: 1;
  transform: scale(1) translateY(0);
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.hero {
  padding: 3.5rem 0 3.4rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  align-items: center;
  gap: 3rem;
}

.hero-copy h1 {
  font-size: clamp(2.1rem, 2.3rem + 1vw, 2.8rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-text-soft);
  max-width: 34rem;
  margin-bottom: 1.4rem;
}

.hero-benefits {
  list-style: none;
  padding: 0;
  margin: 0 0 1.8rem;
  display: grid;
  gap: 0.4rem;
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

.hero-benefits li::before {
  content: "●";
  font-size: 0.55rem;
  margin-right: 0.5rem;
  color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: radial-gradient(circle at top left, #93c5fd, transparent 45%),
    linear-gradient(120deg, var(--color-primary), var(--color-primary-strong));
  color: #f9fafb;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 55px rgba(37, 99, 235, 0.4);
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-border-subtle);
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background-color: var(--color-bg-soft);
  border-color: var(--color-border-strong);
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.hero-panel {
  position: relative;
}

.hero-card {
  background-color: var(--color-bg-elevated);
  border-radius: 1.25rem;
  box-shadow: var(--shadow-soft);
  padding: 1rem 1.1rem 1.2rem;
  border: 1px solid color-mix(in srgb, var(--color-primary-soft) 40%, transparent);
  transform: translateY(6px);
}

.hero-card-header {
  display: flex;
  gap: 0.3rem;
  padding-bottom: 0.4rem;
}

.hero-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, white 0, #f97316 50%, #ea580c 100%);
}

.hero-dot:nth-child(2) {
  background: radial-gradient(circle at 30% 30%, white 0, #10b981 50%, #059669 100%);
}

.hero-dot:nth-child(3) {
  background: radial-gradient(circle at 30% 30%, white 0, #3b82f6 50%, #1d4ed8 100%);
}

.hero-card-body {
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.hero-card-body p {
  margin: 0 0 0.4rem;
}

.hero-card-faded {
  opacity: 0.7;
}

.section-header {
  text-align: left;
  margin-bottom: 1.4rem;
}

.section-header h2 {
  font-size: 1.4rem;
  margin-bottom: 0.3rem;
}

.section-header p {
  margin: 0;
  max-width: 34rem;
  color: var(--color-text-soft);
  font-size: 0.97rem;
}

.tool-section {
  padding: 0 0 3rem;
}

.tool-form {
  background-color: var(--color-bg-elevated);
  border-radius: 1.2rem;
  padding: 1.4rem 1.4rem 1.2rem;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-subtle);
  display: grid;
  gap: 1.1rem;
}

.tool-mode {
  margin: 0;
  border: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.tool-mode legend {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.radio-pill {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.radio-pill input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-pill span {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg);
  transition: background var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast);
}

.radio-pill input:checked + span {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-strong);
  box-shadow: var(--shadow-subtle);
}

.tool-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
}

.field-label {
  font-weight: 600;
  color: var(--color-text-soft);
}

.field-input {
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg);
  color: inherit;
  font: inherit;
  min-height: 2.5rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.field-input:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft), 0 0 0 2px color-mix(in srgb, var(--color-primary) 55%, transparent);
}

.field-help {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.field-switch {
  align-items: center;
  flex-direction: row;
  justify-content: space-between;
}

.switch {
  position: relative;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background-color: var(--color-border-subtle);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.switch-slider::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 999px;
  background-color: #ffffff;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.35);
  transition: transform var(--transition-fast);
}

.switch input:checked + .switch-slider {
  background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
  box-shadow: var(--shadow-subtle);
}

.switch input:checked + .switch-slider::before {
  transform: translate(17px, -50%);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.copy-status {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.tool-output {
  margin-top: 1.5rem;
  background-color: var(--color-bg-elevated);
  border-radius: 1.1rem;
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-subtle);
  padding: 1.2rem 1.2rem 1.1rem;
}

.tool-output-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}

.tool-output-header h3 {
  margin: 0;
  font-size: 1rem;
}

.tool-output-subtitle {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.tool-output-textarea {
  width: 100%;
  border-radius: 0.9rem;
  border: 1px dashed var(--color-border-subtle);
  padding: 0.8rem;
  background-color: color-mix(in srgb, var(--color-bg) 92%, transparent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.9rem;
  color: inherit;
  resize: vertical;
  min-height: 180px;
}

.tool-output-textarea:focus-visible {
  outline: none;
  border-style: solid;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft);
}

.faq-section {
  padding: 0 0 3.5rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.faq-item {
  border-radius: 0.9rem;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.faq-icon {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-med), background var(--transition-med),
    color var(--transition-med);
}

.faq-answer {
  padding: 0 1rem 0.8rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease-out, padding-top 180ms ease-out;
}

.faq-answer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.faq-item.open .faq-answer {
  padding-top: 0.15rem;
  max-height: 300px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.page-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 2rem + 0.4vw, 2.2rem);
  letter-spacing: -0.03em;
  margin-bottom: 0.6rem;
}

.page-intro {
  margin: 0;
  max-width: 40rem;
  color: var(--color-text-soft);
  font-size: 0.98rem;
}

.content-section {
  padding: 0 0 3rem;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.3fr) minmax(0, 1.3fr);
  gap: 2.2rem;
}

.content-main h2 {
  margin-top: 1.3rem;
  margin-bottom: 0.4rem;
  font-size: 1.15rem;
}

.content-main p {
  margin: 0.4rem 0;
  color: var(--color-text-soft);
  font-size: 0.97rem;
}

.content-main ul {
  padding-left: 1.1rem;
  margin: 0.4rem 0 0.8rem;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.content-aside {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  border-radius: 0.9rem;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-subtle);
  padding: 1rem 1.1rem;
}

.card-title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.93rem;
}

.card-list {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.93rem;
  color: var(--color-text-soft);
}

.contact-form {
  margin-top: 0.8rem;
  padding: 1rem 1.1rem;
  border-radius: 0.9rem;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-elevated);
  box-shadow: var(--shadow-subtle);
  display: grid;
  gap: 0.8rem;
}

.form-note {
  margin: 0.2rem 0 0.4rem;
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

.legal-copy h2 {
  margin-top: 1.4rem;
  margin-bottom: 0.4rem;
  font-size: 1.1rem;
}

.legal-copy p {
  margin: 0.35rem 0;
  font-size: 0.96rem;
  color: var(--color-text-soft);
}

.legal-copy ul {
  padding-left: 1.1rem;
  margin: 0.4rem 0 0.8rem;
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  padding: 1.4rem 0 1.3rem;
  background-color: color-mix(in srgb, var(--color-bg) 92%, transparent);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  font-size: 0.88rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

.footer-copy {
  margin: 0;
  color: var(--color-text-muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-panel {
    order: -1;
  }

  .content-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 760px) {
  .header-inner {
    align-items: center;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    margin-right: 0.25rem;
  }

  .nav-list {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    padding: 0.5rem 1rem 0.75rem;
    margin: 0;
    flex-direction: column;
    align-items: flex-start;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-subtle);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .site-nav.open .nav-list {
    opacity: 1;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .tool-controls {
    grid-template-columns: minmax(0, 1fr);
  }

  .tool-output-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .faq-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}