:root {
  --color-primary: #2563eb;
  --color-secondary: #0ea5e9;
  --color-accent: #8b5cf6;
  --color-success: #16a34a;
  --color-danger: #dc2626;

  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-soft: #f1f5f9;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-text-muted: #475569;

  --font-heading: Poppins, Inter, system-ui, sans-serif;
  --font-body: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);

  --container: 1160px;
  --duration-fast: 150ms;
  --duration-normal: 220ms;
}

:root[data-theme="dark"] {
  --color-bg: #020617;
  --color-surface: #0f172a;
  --color-surface-soft: #111b31;
  --color-border: #23314b;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --shadow-sm: none;
  --shadow-md: none;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -44px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  z-index: 1000;
}

.skip-link:focus {
  top: 12px;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.section {
  padding: var(--space-16) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-head {
  margin-bottom: var(--space-8);
}

.kicker {
  margin: 0 0 var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  font-size: 12px;
  color: var(--color-primary);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-heading);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

p {
  margin: 0;
}

.text-muted {
  color: var(--color-text-muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
}

.header-row {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.site-nav a:hover,
.site-nav a.active,
.site-nav a:focus-visible {
  color: var(--color-text);
  border-bottom-color: var(--color-primary);
}

.header-actions {
  display: flex;
  gap: var(--space-3);
}

.menu-toggle,
.theme-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font: inherit;
  cursor: pointer;
}

.menu-toggle {
  display: none;
}

.hero {
  padding-top: var(--space-16);
  background:
    radial-gradient(circle at 90% 12%, color-mix(in srgb, var(--color-secondary) 16%, transparent), transparent 36%),
    radial-gradient(circle at 12% 90%, color-mix(in srgb, var(--color-accent) 14%, transparent), transparent 34%);
}

.hero-grid,
.grid-2,
.grid-3,
.grid-4,
.grid-12 {
  display: grid;
  gap: var(--space-6);
}

.hero-grid,
.grid-12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.col-8 {
  grid-column: span 8;
}

.col-7 {
  grid-column: span 7;
}

.col-6 {
  grid-column: span 6;
}

.col-5 {
  grid-column: span 5;
}

.col-4 {
  grid-column: span 4;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.9rem);
  max-width: 16ch;
  margin-bottom: var(--space-5);
}

.lead {
  max-width: 62ch;
  color: var(--color-text-muted);
  font-size: 1.07rem;
}

.hero-actions {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0 16px;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--duration-fast) ease, border-color var(--duration-fast) ease, color var(--duration-fast) ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #1d4ed8;
}

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--color-primary);
}

.btn-full {
  width: 100%;
}

.panel,
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.panel {
  padding: var(--space-6);
}

.card {
  padding: var(--space-6);
}

.meta-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.meta-list li {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-3);
}

.meta-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.meta-list strong {
  display: block;
  color: var(--color-text);
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.section-title {
  font-size: clamp(1.5rem, 2.7vw, 2.4rem);
  max-width: 26ch;
}

.service-points,
.bullet-list {
  margin: var(--space-4) 0 0;
  padding-left: 18px;
  color: var(--color-text-muted);
}

.service-points li,
.bullet-list li {
  margin-bottom: var(--space-2);
}

.icon-card {
  border-top: 4px solid var(--color-primary);
}

.stat {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: var(--space-3);
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0 8px 8px 0;
  background: var(--color-surface-soft);
}

.tags-wrap {
  margin-top: var(--space-4);
}

.case-study {
  padding: var(--space-8);
}

.case-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: baseline;
  margin-bottom: var(--space-4);
}

.case-title {
  font-size: 1.4rem;
}

.case-client {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.results {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.result-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  background: var(--color-surface-soft);
  color: var(--color-text-muted);
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-4);
}

.timeline li {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
}

.timeline strong {
  display: block;
  margin-bottom: var(--space-1);
}

.form-grid {
  display: grid;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: block;
  margin-bottom: 7px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

input,
select,
textarea {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font: inherit;
  padding: 10px 12px;
}

fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin: 0;
}

legend {
  padding: 0 6px;
  color: var(--color-text);
  font-weight: 600;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2) var(--space-4);
}

.check-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.check-item input {
  width: auto;
  margin: 0;
}

.alert {
  margin-top: var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  font-size: 0.92rem;
}

.alert-success {
  border-color: color-mix(in srgb, var(--color-success) 55%, var(--color-border));
  background: color-mix(in srgb, var(--color-success) 12%, var(--color-surface));
  color: var(--color-success);
}

.alert-error {
  border-color: color-mix(in srgb, var(--color-danger) 55%, var(--color-border));
  background: color-mix(in srgb, var(--color-danger) 12%, var(--color-surface));
  color: var(--color-danger);
}

.hidden {
  display: none !important;
}

.faq-group {
  display: grid;
  gap: var(--space-4);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: transparent;
  border: 0;
  color: var(--color-text);
  text-align: left;
  padding: var(--space-5);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  color: var(--color-primary);
  font-size: 1.15rem;
  font-weight: 700;
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-muted);
}

.cta-strip {
  background: linear-gradient(120deg, color-mix(in srgb, var(--color-primary) 12%, var(--color-surface)), color-mix(in srgb, var(--color-accent) 10%, var(--color-surface)));
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: var(--space-16);
}

.footer-row {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

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

.footer-row .mono {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
}

:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--color-primary) 44%, transparent);
  outline-offset: 2px;
}

@media (max-width: 1024px) {
  .container {
    width: calc(100% - 40px);
  }

  .col-8,
  .col-7,
  .col-6,
  .col-5,
  .col-4 {
    grid-column: span 12;
  }

  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    width: calc(100% - 30px);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) 15px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .form-row,
  .grid-4,
  .grid-3,
  .grid-2,
  .results,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .footer-row {
    min-height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0ms !important;
    transition-duration: 0ms !important;
    scroll-behavior: auto !important;
  }
}