/* =========================================================
   Plumii - Design tokens (from design-system/plumii/MASTER.md)
   ========================================================= */
:root {
  /* Color */
  --color-primary: #0F172A;
  --color-on-primary: #FFFFFF;
  --color-secondary: #334155;
  --color-accent: #0369A1;
  --color-accent-hover: #075985;
  --color-background: #F8FAFC;
  --color-foreground: #020617;
  --color-muted: #E8ECF1;
  --color-border: #E2E8F0;
  --color-destructive: #DC2626;
  --color-ring: #0F172A;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12), 0 8px 10px rgba(0, 0, 0, 0.06);

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Typography */
  --font-heading: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Open Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1rem, 4vw, 2rem);
  --z-header: 100;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-foreground);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.2;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw + 1rem, 3.75rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem); font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0 0 var(--space-md); max-width: 65ch; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base);
}
a:hover { color: var(--color-accent-hover); }

/* =========================================================
   Focus visible (a11y)
   ========================================================= */
:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-sm) var(--space-md);
  z-index: 1000;
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 600;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 0; color: var(--color-on-primary); }

/* Programmatic focus on <main> (from skip-link) — no visible ring needed */
main:focus { outline: none; }

/* =========================================================
   Layout
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-pad);
}

.icon { width: 1.25rem; height: 1.25rem; flex-shrink: 0; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
  touch-action: manipulation;
}

.btn:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 3px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-on-primary);
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-on-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  min-height: 44px;
  padding: 0.5rem 1rem;
}
.btn-ghost:hover {
  background-color: var(--color-muted);
  color: var(--color-primary);
}

.btn__icon { transition: transform var(--transition-base); }
.btn:hover .btn__icon { transform: translateX(2px); }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(248, 250, 252, 0.85);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-md);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
}
.site-header__brand:hover { color: var(--color-primary); }

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.875rem;
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  padding-block: clamp(3rem, 8vw, 6rem) clamp(3rem, 8vw, 5rem);
}

.hero__inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.hero__title {
  margin-bottom: var(--space-lg);
  text-wrap: balance;
}

.hero__lede {
  font-size: clamp(1.0625rem, 1.25vw + 0.75rem, 1.25rem);
  color: var(--color-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

.hero__cta {
  margin-top: var(--space-md);
}

/* =========================================================
   Services
   ========================================================= */
.services {
  padding-block: clamp(2rem, 6vw, 4rem) clamp(3rem, 8vw, 5rem);
}

.services__header {
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  text-align: center;
}

.services__intro {
  color: var(--color-secondary);
  margin-inline: auto;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .services__grid { grid-template-columns: repeat(4, 1fr); }
}

.service-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-muted);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}
.service-card__icon .icon { width: 24px; height: 24px; }

.service-card__title {
  margin-bottom: var(--space-sm);
}

.service-card__desc {
  color: var(--color-secondary);
  margin: 0;
  font-size: 0.9375rem;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  margin-top: auto;
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-secondary);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.site-footer__copy { margin: 0; }
.site-footer__email { font-weight: 500; }