:root {
  --ink: #172026;
  --muted: #62717a;
  --paper: #f6f3ea;
  --surface: #fffdf7;
  --line: rgba(23, 32, 38, 0.12);
  --blue: #246bfe;
  --blue-dark: #184bb2;
  --lime: #d7f75b;
  --coral: #ec6a4b;
  --navy: #1d2a35;
  --shadow: 0 22px 55px rgba(23, 32, 38, 0.13);
  --radius: 18px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 8%, rgba(36, 107, 254, 0.18), transparent 30%),
    radial-gradient(circle at 88% 10%, rgba(215, 247, 91, 0.34), transparent 28%),
    linear-gradient(135deg, #f8f5ec 0%, #edf1f4 48%, #f7eadf 100%);
  font-family: "Aptos", "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--blue-dark);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

button {
  cursor: pointer;
}

.site-header {
  border-bottom: 1px solid rgba(23, 32, 38, 0.09);
  background: rgba(246, 243, 234, 0.82);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  align-items: center;
  display: flex;
  gap: 22px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  padding: 16px 22px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-weight: 900;
  gap: 10px;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--lime);
  border: 2px solid var(--ink);
  border-radius: 11px;
  box-shadow: 4px 4px 0 var(--ink);
  color: var(--ink);
  display: inline-flex;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.nav-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.page-shell {
  margin: 0 auto;
  max-width: var(--max);
  padding: 30px 22px 58px;
}

.tool-intro {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 0.95fr) minmax(260px, 0.42fr);
  margin: 24px 0;
}

.eyebrow {
  color: var(--coral);
  font-size: 0.84rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.intro-copy h1 {
  font-size: clamp(2.25rem, 5vw, 5rem);
  letter-spacing: -0.075em;
  line-height: 0.92;
  margin: 0 0 18px;
  max-width: 850px;
}

.intro-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
  max-width: 760px;
}

.privacy-note {
  align-self: end;
  background: var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: rgba(255, 255, 255, 0.78);
  padding: 18px;
}

.privacy-note strong {
  color: var(--lime);
  display: block;
  margin-bottom: 6px;
}

.tool-grid {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(310px, 470px) minmax(0, 1fr);
}

.panel {
  background: rgba(255, 253, 247, 0.9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.controls,
.result-panel {
  padding: 18px;
}

.control-stack {
  display: grid;
  gap: 16px;
}

.control {
  display: grid;
  gap: 8px;
}

.control label,
.preset-block span {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 900;
}

.control label span {
  color: var(--muted);
  font-weight: 700;
}

input,
select,
textarea {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  min-height: 46px;
  padding: 10px 12px;
  width: 100%;
}

textarea {
  min-height: 164px;
  resize: vertical;
}

.split {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

.preset-block {
  display: grid;
  gap: 9px;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-row button,
.btn {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  text-decoration: none;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.preset-row button {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--navy);
  font-size: 0.88rem;
  padding: 8px 11px;
}

.preset-row button:hover {
  border-color: var(--blue);
  transform: translateY(-1px);
}

.actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr 0.72fr;
}

.btn {
  border: 1px solid transparent;
  min-height: 46px;
  padding: 10px 14px;
}

.btn-primary {
  background: var(--blue);
  box-shadow: 0 13px 24px rgba(36, 107, 254, 0.24);
  color: #fff;
}

.btn-primary:hover {
  background: var(--blue-dark);
}

.btn-secondary {
  background: var(--lime);
  border-color: var(--ink);
  color: var(--ink);
}

.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.result-panel {
  display: grid;
  gap: 16px;
}

.result-top {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
}

.result-top span {
  color: var(--muted);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-top strong {
  color: var(--blue-dark);
}

.result-top strong.is-error {
  color: var(--coral);
}

.url-breakdown,
.checklist {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 16px;
}

.url-breakdown h2,
.checklist h2 {
  font-size: 1.05rem;
  margin: 0 0 10px;
}

dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

dl div {
  border-bottom: 1px solid rgba(23, 32, 38, 0.08);
  display: grid;
  gap: 2px;
  padding-bottom: 8px;
}

dl div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

dt {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 900;
}

dd {
  color: var(--muted);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 0.9rem;
  margin: 0;
  overflow-wrap: anywhere;
}

.is-muted dd {
  color: rgba(98, 113, 122, 0.58);
}

.checklist ul {
  color: var(--muted);
  margin: 0;
  padding-left: 20px;
}

.seo-section {
  margin-top: 54px;
}

.seo-section h2 {
  font-size: clamp(1.75rem, 3vw, 2.65rem);
  letter-spacing: -0.045em;
  line-height: 1.04;
  margin: 0 0 14px;
}

.seo-section p {
  color: var(--muted);
  max-width: 860px;
}

.feature-grid,
.faq-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.feature,
.faq-item {
  background: rgba(255, 253, 247, 0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.feature h3,
.faq-item h3 {
  font-size: 1.03rem;
  margin: 0 0 8px;
}

.feature p,
.faq-item p {
  font-size: 0.96rem;
  margin: 0;
}

.content-page {
  background: rgba(255, 253, 247, 0.86);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-top: 28px;
  padding: 28px;
}

.content-page h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.055em;
  margin: 0 0 18px;
}

.content-page h2 {
  margin-top: 28px;
}

.content-page p,
.content-page li {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid rgba(23, 32, 38, 0.1);
  color: var(--muted);
  margin-top: 48px;
  padding: 22px;
}

.footer-inner {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 960px) {
  .tool-intro,
  .tool-grid,
  .feature-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .split,
  .actions {
    grid-template-columns: 1fr;
  }

  .page-shell {
    padding-inline: 14px;
  }

  .controls,
  .result-panel,
  .content-page {
    padding: 14px;
  }
}