:root {
  --bg: #f4f8ff;
  --surface: #ffffff;
  --surface-2: #ecf3ff;
  --text: #12213a;
  --muted: #536079;
  --line: #d7e3fb;
  --brand: #0a6aff;
  --brand-deep: #0046bf;
  --accent: #12b886;
  --warn: #f59f00;
  --shadow: 0 20px 45px -26px rgba(18, 33, 58, 0.35);
  --radius-sm: 0.7rem;
  --radius-md: 1rem;
  --radius-lg: 1.35rem;
  --container: 72rem;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(68rem 40rem at -8% -8%, rgba(10, 106, 255, 0.18), transparent 55%),
    radial-gradient(55rem 35rem at 108% 4%, rgba(18, 184, 134, 0.16), transparent 56%),
    linear-gradient(180deg, #f8fbff, var(--bg));
  line-height: 1.55;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

.container {
  width: min(var(--container), 92vw);
  margin-inline: auto;
}

.page-main {
  padding-block: 2rem 4rem;
  display: grid;
  gap: 1.1rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 10000;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  backdrop-filter: blur(10px);
  background: rgba(248, 251, 255, 0.8);
  border-bottom: 1px solid rgba(215, 227, 251, 0.85);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.58rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 0.58rem;
  background: linear-gradient(145deg, var(--brand), var(--brand-deep));
  color: #fff;
}

.brand-text {
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.6rem;
  border: 1px solid var(--line);
  background: var(--surface);
}

.nav-toggle span {
  display: block;
  width: 1.2rem;
  height: 0.12rem;
  margin: 0.24rem auto;
  background: var(--text);
  border-radius: 99px;
}

.nav-links {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  text-decoration: none;
  padding: 0.5rem 0.66rem;
  border-radius: 0.55rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
}

.nav-links a[aria-current="page"] {
  color: var(--brand-deep);
  background: var(--surface-2);
}

.hero-section {
  padding-block: 3rem 1.8rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 1.2rem;
  align-items: stretch;
}

.hero-copy {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(215, 227, 251, 0.85);
}

.hero-copy h1 {
  margin: 0.4rem 0 0.5rem;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  line-height: 1.05;
}

.eyebrow {
  margin: 0;
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-deep);
  font-weight: 800;
}

.hero-subtext {
  margin-top: 0.8rem;
  color: var(--muted);
  font-size: 1.03rem;
}

.hero-panel,
.panel {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid rgba(215, 227, 251, 0.9);
  box-shadow: var(--shadow);
  padding: 1.35rem;
}

.hero-panel h2,
.panel h1,
.panel h2 {
  margin-top: 0;
  margin-bottom: 0.65rem;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.check-list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.45rem;
}

.benefits-strip {
  padding-bottom: 1.7rem;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
}

.benefit-card {
  background: var(--surface);
  border: 1px solid rgba(215, 227, 251, 0.88);
  border-radius: var(--radius-md);
  padding: 1.05rem;
  box-shadow: var(--shadow);
}

.benefit-card h3 {
  margin-top: 0;
  margin-bottom: 0.3rem;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.feature-panel {
  margin-bottom: 3rem;
}

.btn {
  border: 1px solid transparent;
  border-radius: 0.66rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.33rem;
  min-height: 2.6rem;
  padding: 0.62rem 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

.btn-small {
  min-height: 2.2rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.87rem;
}

.btn-primary {
  background: linear-gradient(145deg, var(--brand), var(--brand-deep));
  color: #fff;
  box-shadow: 0 12px 24px -16px rgba(0, 70, 191, 0.9);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--brand-deep);
  border-color: var(--line);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.75);
  color: var(--text);
  border-color: var(--line);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.filters-grid,
.brief-grid,
.finder-form,
.stack-form {
  display: grid;
  gap: 0.7rem;
}

.filters-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: end;
}

.brief-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.brief-grid .form-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: #364662;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.68rem 0.78rem;
  font: inherit;
  color: var(--text);
  background: #fbfdff;
}

textarea {
  resize: vertical;
}

.catalog-section {
  display: grid;
  gap: 0.8rem;
}

.catalog-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.catalog-card {
  background: var(--surface);
  border: 1px solid rgba(215, 227, 251, 0.9);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.catalog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.36rem;
  margin-bottom: 0.45rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-size: 0.74rem;
  background: var(--surface-2);
  color: var(--brand-deep);
  font-weight: 700;
}

.result-box {
  background: #f8fbff;
  border: 1px dashed #c6d7f8;
  border-radius: var(--radius-md);
  padding: 1rem;
  color: #243452;
  min-height: 4.5rem;
  white-space: pre-wrap;
}

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

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
}

.site-footer {
  border-top: 1px solid rgba(215, 227, 251, 0.95);
  background: rgba(255, 255, 255, 0.8);
  margin-top: 1.5rem;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.1rem;
}

.footer-brand {
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  font-weight: 700;
  margin: 0;
}

.footer-note {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.footer-links {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.42rem 0.5rem;
  border-radius: 0.5rem;
}

.footer-meta {
  padding-bottom: 1rem;
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 17, 32, 0.52);
}

.modal-card {
  position: relative;
  width: min(40rem, 96vw);
  max-height: 88vh;
  overflow: auto;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.icon-button {
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.chat-log {
  min-height: 14rem;
  max-height: 48vh;
  overflow-y: auto;
  margin: 0.8rem 0;
  padding: 0.65rem;
  background: #f8fbff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  display: grid;
  gap: 0.45rem;
}

.chat-message {
  padding: 0.58rem 0.7rem;
  border-radius: 0.7rem;
  max-width: 90%;
}

.chat-message.user {
  background: rgba(10, 106, 255, 0.15);
  margin-left: auto;
}

.chat-message.assistant {
  background: rgba(18, 184, 134, 0.13);
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

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

:focus-visible {
  outline: 2px solid #1170ff;
  outline-offset: 2px;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: revealUp 500ms ease forwards;
}

.delay-1 {
  animation-delay: 90ms;
}

.delay-2 {
  animation-delay: 160ms;
}

@keyframes revealUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 60rem) {
  .hero-grid,
  .benefit-grid,
  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .filters-grid {
    grid-template-columns: 1fr 1fr;
  }

  .filters-grid button {
    grid-column: 1 / -1;
  }

  .brief-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 46rem) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 4.2rem;
    background: rgba(252, 254, 255, 0.98);
    border-bottom: 1px solid rgba(215, 227, 251, 0.95);
    padding: 0.9rem 0.9rem 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a,
  .nav-links .btn {
    width: 100%;
    justify-content: flex-start;
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }
}