/* ---------------------------------------------------------
   PropEV — styles.css
   Plain CSS, no build step. Organised top to bottom:
   1. Reset & base
   2. Design tokens
   3. Typography
   4. Layout helpers
   5. Header & nav
   6. Buttons & links
   7. Hero
   8. Cards & sections
   9. Contact
   10. Footer
   11. Scroll-reveal animation
   12. Responsive breakpoints
--------------------------------------------------------- */

/* 1. Reset & base ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
img, svg { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea { font: inherit; }

@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;
    scroll-behavior: auto !important;
  }
}

/* 2. Design tokens ------------------------------------------------ */
:root {
  --color-green: #7FB03D;
  --color-olive: #5E6B2E;
  --color-leaf-top: #8FBE44;
  --color-leaf-bottom: #5E6B2E;
  --color-charcoal: #2F2C26;
  --color-body: #4A4740;
  --color-muted: #7A776F;
  --color-bg: #FAFAF6;
  --color-surface: #FFFFFF;
  --color-hairline: #EAE8E1;

  --font-heading: 'Manrope', Arial, sans-serif;
  --font-body: 'Inter', Arial, sans-serif;

  --container-width: 1140px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 2px rgba(47, 44, 38, 0.04), 0 8px 24px rgba(47, 44, 38, 0.05);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;
}

/* 3. Typography ------------------------------------------------ */
body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--color-charcoal);
  line-height: 1.2;
  font-weight: 700;
}

h3 { font-size: 1.15rem; font-weight: 700; }

.eyebrow {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: var(--space-2);
}

.section-heading {
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.25rem);
  font-weight: 800;
  margin-bottom: var(--space-4);
  max-width: 40ch;
}

/* 4. Layout helpers ------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.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 {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  background: var(--color-charcoal);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top 0.2s ease;
}
.skip-link:focus { top: var(--space-2); }

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

/* Consistent focus visibility across all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 5. Header & nav ------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 246, 0.9);
  backdrop-filter: saturate(150%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-hairline);
  box-shadow: 0 1px 0 rgba(47, 44, 38, 0.02);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
  gap: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}
.brand__mark { width: 34px; height: 34px; flex-shrink: 0; }
.brand__type { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-charcoal);
}
.brand__tagline {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.site-nav__list a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-body);
  position: relative;
  padding-block: 0.25rem;
}
.site-nav__list a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
}
.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-charcoal);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 6. Buttons & links ------------------------------------------------ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.button--primary {
  background: var(--color-green);
  color: #fff;
}
.button--primary:hover {
  background: var(--color-olive);
}
.button--primary:active { transform: translateY(1px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
  color: var(--color-charcoal);
  border-bottom: 1px solid var(--color-hairline);
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.link-arrow:hover, .link-arrow:focus-visible {
  color: var(--color-green);
  border-color: var(--color-green);
}
.link-arrow::after { content: '→'; transition: transform 0.2s ease; }
.link-arrow:hover::after { transform: translateX(3px); }

/* 7. Hero ------------------------------------------------ */
.hero { padding-top: var(--space-7); padding-bottom: var(--space-7); }
.hero__inner { max-width: 760px; }
.hero__heading {
  font-size: clamp(2.1rem, 1.6rem + 2.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}
.hero__subhead {
  font-size: 1.1rem;
  color: var(--color-body);
  max-width: 60ch;
  margin-bottom: var(--space-4);
}
.hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* 8. Cards & sections ------------------------------------------------ */
.card-grid {
  display: grid;
  gap: var(--space-3);
}
.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--color-body); }
.card__org {
  color: var(--color-green);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.value-band {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-green);
  border-radius: var(--radius);
  max-width: 80ch;
}
.value-band p { color: var(--color-body); font-size: 1.05rem; }

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

.stage-card {
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-4);
}
.stage-card__num {
  display: block;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.5rem;
  color: var(--color-green);
  line-height: 1;
  margin-bottom: var(--space-2);
}
.stage-card h3 { margin-bottom: 0.25rem; }
.stage-card__label {
  color: var(--color-muted);
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}
.stage-card p:last-child { color: var(--color-body); }

.check-list {
  display: grid;
  gap: var(--space-3);
  max-width: 70ch;
  margin-bottom: var(--space-5);
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}
.check-list__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}
.check-list p { color: var(--color-body); }

.independence-band {
  margin: 0;
  padding: var(--space-5);
  background: var(--color-charcoal);
  border-radius: var(--radius);
  max-width: 80ch;
}
.independence-band p {
  color: #F2F1EC;
  font-size: 1.15rem;
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.5;
}

.track-record { background: var(--color-surface); }

/* 9. Contact ------------------------------------------------ */
.contact__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--space-6);
  align-items: start;
}
.contact__intro p { margin-top: var(--space-2); font-size: 1.05rem; }
.contact__details {
  margin-top: var(--space-4);
  display: grid;
  gap: 0.5rem;
}
.contact__details a { color: var(--color-green); font-weight: 500; }
.contact__details a:hover { text-decoration: underline; }

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-3);
  box-shadow: var(--shadow-card);
}
.form-field { display: grid; gap: 0.4rem; }
.form-field label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-charcoal);
}
.form-field input,
.form-field textarea {
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  background: var(--color-bg);
  color: var(--color-charcoal);
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: 2px solid var(--color-green);
  outline-offset: 1px;
  border-color: var(--color-green);
}
.contact-form__submit { justify-self: start; margin-top: 0.25rem; }
.contact-form__fallback {
  font-size: 0.9rem;
  color: var(--color-muted);
}
.contact-form__fallback a { color: var(--color-green); font-weight: 500; }

/* 10. Footer ------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--color-hairline);
  padding-block: var(--space-5);
}
.site-footer__inner {
  display: grid;
  gap: var(--space-3);
}
.brand--footer { margin-bottom: var(--space-1); }
.site-footer__independence {
  max-width: 60ch;
  color: var(--color-muted);
  font-size: 0.95rem;
}
.site-footer__details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem var(--space-2);
  font-size: 0.9rem;
  color: var(--color-body);
}
.site-footer__details li:not(:last-child)::after {
  content: '·';
  margin-left: var(--space-2);
  color: var(--color-hairline);
}
.site-footer__details a { color: var(--color-body); }
.site-footer__details a:hover { color: var(--color-green); }
.site-footer__copyright {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: var(--space-2);
}

/* 11. Scroll-reveal animation ------------------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* 12. Responsive breakpoints ------------------------------------------------ */
@media (max-width: 900px) {
  .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .contact__inner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-hairline);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--space-3) var(--space-3);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .site-nav.is-open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__list a {
    display: block;
    padding-block: 0.75rem;
    border-bottom: 1px solid var(--color-hairline);
  }
  .site-nav__list a::after { display: none; }
  .site-nav__cta { margin-top: var(--space-2); justify-content: center; }

  .card-grid--3 { grid-template-columns: 1fr; }
  .card-grid--4 { grid-template-columns: 1fr; }

  section { padding-block: var(--space-5); }
  .hero { padding-top: var(--space-5); padding-bottom: var(--space-5); }
}

@media (min-width: 769px) and (max-width: 1080px) {
  .card-grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 400px) {
  .container { padding-inline: var(--space-2); }
}