/* ---------------------------------------------------------------
   Pente Systems — design tokens and base styles
   Mobile-first. No inline styles are used anywhere on the site
   (Content-Security-Policy forbids 'unsafe-inline' for style-src).
   ------------------------------------------------------------- */

:root {
  /* Brand colors */
  --color-primary: #0f2a43;
  --color-primary-dark: #081a2c;
  --color-accent: #0d8a8a;
  --color-accent-dark: #0a6d6d;

  /* Solid-fill button/skip-link backgrounds need white text at 4.5:1+.
     --color-accent itself only manages 4.18:1 (and dark mode's brighter
     --color-accent only 3.09:1) with white text, so these stay fixed
     across both themes rather than tracking the lighter, theme-varying
     accent used for links/icons/decoration. */
  --color-accent-button: #0a6d6d;
  --color-accent-button-hover: #085757;

  /* Semantic tokens (light mode, default) */
  --color-bg: #ffffff;
  --color-surface: #f4f6f8;
  --color-text: #16232f;
  --color-text-muted: #4b5a67;
  --color-border: #dbe2e8;
  --color-focus-ring: #0d8a8a;

  /* Header stays on a fixed light surface in both themes: the logo
     artwork is flattened onto an opaque white background with no
     dark/reversed variant available, so inverting or theming the
     header would either box it in white or make it illegible. */
  --color-header-bg: #ffffff;
  --color-header-text: #16232f;
  --color-header-border: #dbe2e8;

  --color-cta-band-bg: var(--color-primary);
  --color-cta-band-text: #ffffff;

  --color-footer-bg: var(--color-primary-dark);
  --color-footer-text: #cfd8e0;
  --color-footer-text-muted: #93a3b1;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;

  /* Layout */
  --content-width: 1100px;
  --radius: 8px;
  --shadow-card: 0 1px 3px rgba(16, 35, 47, 0.08), 0 1px 2px rgba(16, 35, 47, 0.06);

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #10181f;
    --color-surface: #172230;
    --color-text: #e6ecf1;
    --color-text-muted: #a9b6c1;
    --color-border: #2b3947;
    --color-focus-ring: #35c2c2;

    --color-accent: #14a3a3;
    --color-accent-dark: #0d8a8a;

    --color-cta-band-bg: #0a1826;
    --color-cta-band-text: #ffffff;

    --color-footer-bg: #060d15;
    --color-footer-text: #c3ccd3;
    --color-footer-text-muted: #7c8c99;

    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  }
}

/* ---------------------------------------------------------------
   Reset / base
   ------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent-dark);
}

@media (prefers-color-scheme: dark) {
  a {
    color: var(--color-accent);
  }
}

:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------
   Visually hidden (screen-reader only)
   ------------------------------------------------------------- */

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

/* ---------------------------------------------------------------
   Skip link
   ------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-3);
  background: var(--color-accent-button);
  color: #ffffff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  z-index: 100;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-3);
}

/* ---------------------------------------------------------------
   Typography
   ------------------------------------------------------------- */

h1,
h2,
h3 {
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 var(--space-3);
}

h1 {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-3);
}

.lede {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent-dark);
}

@media (prefers-color-scheme: dark) {
  .eyebrow {
    color: var(--color-accent);
  }
}

/* ---------------------------------------------------------------
   Layout primitives
   ------------------------------------------------------------- */

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-6) 0;
}

.section-alt {
  background: var(--color-surface);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.text-center {
  text-align: center;
}

/* ---------------------------------------------------------------
   Buttons
   ------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  line-height: 1.2;
}

.btn-primary {
  background: var(--color-accent-button);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-accent-button-hover);
}

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

@media (prefers-color-scheme: dark) {
  .btn-secondary {
    color: var(--color-text);
  }
}

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

.btn-on-dark {
  background: #ffffff;
  color: var(--color-primary);
}

.btn-on-dark:hover {
  background: var(--color-surface);
}

/* ---------------------------------------------------------------
   Header / nav
   ------------------------------------------------------------- */

.site-header {
  background: var(--color-header-bg);
  color: var(--color-header-text);
  border-bottom: 1px solid var(--color-header-border);
  position: sticky;
  top: 0;
  z-index: 50;
  /* Dark mode's brighter --color-focus-ring (#35c2c2, tuned for dark
     page backgrounds) fails 3:1 against this header's fixed-light
     background. Shadow it back to the light-mode value for anything
     focused inside the header, in both themes. */
  --color-focus-ring: #0d8a8a;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  position: relative;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  border: 1px solid var(--color-header-border);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-header-text);
  cursor: pointer;
}

.nav-toggle-icon {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.nav-menu {
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0 var(--space-4);
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
}

.nav-menu.is-open {
  display: flex;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-header-border);
  box-shadow: var(--shadow-card);
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.nav-menu a:not(.btn) {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-header-text);
  text-decoration: none;
  font-weight: 600;
}

.nav-menu a:not(.btn):hover {
  color: var(--color-accent-dark);
}

.nav-menu a:not(.btn)[aria-current="page"] {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.nav-cta {
  margin-top: var(--space-2);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu,
  .nav-menu.is-open {
    display: flex;
    flex-direction: row;
    align-items: center;
    position: static;
    background: transparent;
    border-bottom: none;
    box-shadow: none;
    width: auto;
    padding: 0;
    gap: var(--space-4);
  }

  .nav-menu a:not(.btn) {
    padding: 0;
  }

  .nav-cta {
    margin-top: 0;
  }
}

/* ---------------------------------------------------------------
   Hero
   ------------------------------------------------------------- */

.hero {
  padding: var(--space-6) 0;
  background: var(--color-surface);
}

.hero .container {
  max-width: 760px;
}

.hero-actions {
  margin-top: var(--space-4);
}

/* ---------------------------------------------------------------
   Cards
   ------------------------------------------------------------- */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
}

.card h3 {
  margin-bottom: 0;
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  flex-grow: 1;
}

.card-link {
  font-weight: 600;
  text-decoration: none;
}

/* ---------------------------------------------------------------
   "Why Pente Systems" strip
   ------------------------------------------------------------- */

.why-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

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

.why-list li {
  padding-left: var(--space-4);
  position: relative;
}

.why-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ---------------------------------------------------------------
   CTA band
   ------------------------------------------------------------- */

.cta-band {
  background: var(--color-cta-band-bg);
  color: var(--color-cta-band-text);
  padding: var(--space-6) 0;
}

.cta-band h2 {
  color: inherit;
}

.cta-band p {
  color: inherit;
  opacity: 0.9;
}

/* ---------------------------------------------------------------
   Footer
   ------------------------------------------------------------- */

.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-5) 0;
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--color-footer-text);
}

.footer-meta {
  color: var(--color-footer-text-muted);
  margin-top: var(--space-1);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0 0 var(--space-2);
  padding: 0;
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.placeholder {
  color: inherit;
  font-style: italic;
}

/* ---------------------------------------------------------------
   Contact layout
   ------------------------------------------------------------- */

.container-form {
  max-width: 600px;
}

/* ---------------------------------------------------------------
   Forms
   ------------------------------------------------------------- */

.field {
  margin-bottom: var(--space-4);
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.field-required-mark {
  color: var(--color-accent-dark);
}

@media (prefers-color-scheme: dark) {
  .field-required-mark {
    color: var(--color-accent);
  }
}

.field input,
.field select,
.field textarea {
  width: 100%;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
}

.field textarea {
  resize: vertical;
  min-height: 8rem;
}

.field-hint {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: var(--space-1);
}

/* Honeypot field: kept in the layout (not display:none) and off-screen,
   with aria-hidden + tabindex="-1" in the markup so real (including
   screen-reader) visitors never see or reach it. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}