/* ===== CSS Custom Properties ===== */
:root {
  --color-green: #1B4D3E;
  --color-green-light: #2D6B55;
  --color-green-dark: #0F3328;
  --color-green-accent: #4A8B6F;
  --color-green-accent-hover: #3A7A5F;
  --color-green-accent-light: #E6F4EE;
  --color-bg: rgba(27, 77, 62, 0.02);
  --color-bg-light: rgba(27, 77, 62, 0.05);
  --color-bg-alt: rgba(27, 77, 62, 0.10);
  --color-text: #2d3748;
  --color-text-light: #4a5568;
  --color-text-muted: #718096;
  --color-border: #c8d6cc;
  --color-white: #ffffff;
  --color-error: #c53030;
  --color-focus: #4A8B6F;

  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 5rem;

  --max-width: 1120px;
  --nav-height: 68px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --transition: 0.25s ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 1.125rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-green-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

ul {
  list-style: none;
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-green);
  color: var(--color-white);
  font-weight: 600;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-green);
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
}

p:last-child {
  margin-bottom: 0;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===== Section ===== */
.section {
  padding: var(--spacing-4xl) 0;
}

.section-intro {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--spacing-3xl);
  color: var(--color-text-light);
  font-size: 1.1rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.9rem 2rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: center;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

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

.btn-primary {
  background: var(--color-green-accent);
  color: var(--color-white);
  border-color: var(--color-green-accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-green-accent-hover);
  border-color: var(--color-green-accent-hover);
  box-shadow: 0 4px 12px rgba(74, 139, 111, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-green);
  border-color: var(--color-green);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--color-green);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(27, 77, 62, 0.2);
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo {
  height: 44px;
  width: auto;
}

/* Nav Toggle (Hamburger) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  z-index: 101;
}

.nav-toggle .bar {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--color-green);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.nav-list {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-list a {
  color: var(--color-green);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--spacing-xs) 0;
}

.nav-list a:hover {
  color: var(--color-green-accent);
}

/* ===== Hero ===== */
.hero {
  padding: calc(var(--nav-height) + var(--spacing-4xl)) 0 var(--spacing-4xl);
  background: var(--color-bg-light);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-image {
  display: flex;
  justify-content: center;
}

.hero-image img {
  border-radius: 50%;
  width: 280px;
  height: 280px;
  object-fit: cover;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

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

.hero-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-green-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.hero h1 {
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ===== Services ===== */
.services {
  background: var(--color-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.service-card h3 {
  color: var(--color-green);
  margin-bottom: var(--spacing-md);
}

.service-card p {
  color: var(--color-text-light);
  font-size: 1rem;
}

/* ===== About ===== */
.about {
  background: var(--color-bg-light);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
  margin-bottom: var(--spacing-3xl);
}

.about-image {
  display: flex;
  justify-content: center;
}

.about-image img {
  border-radius: 50%;
  max-width: 240px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  font-size: 1.05rem;
}

.credentials {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.credentials h3 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.credentials-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.credentials-list li {
  background: var(--color-green-accent-light);
  color: var(--color-green);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===== Area ===== */
.area {
  background: var(--color-bg);
}

.area-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  max-width: 600px;
  margin: 0 auto;
}

.area-list li {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  text-align: center;
  font-weight: 500;
  color: var(--color-green);
  font-size: 1rem;
}

/* ===== Contact ===== */
.contact {
  background: var(--color-bg-light);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
}

.contact-info h3 {
  margin-bottom: var(--spacing-lg);
}

.contact-details {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-sm) var(--spacing-md);
}

.contact-details dt {
  font-weight: 600;
  color: var(--color-green);
}

.contact-details dd {
  color: var(--color-text-light);
}

.contact-details dd a {
  font-weight: 500;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}

.required {
  color: var(--color-error);
}

.form-group input,
.form-group textarea {
  padding: 0.8rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-green-accent);
  box-shadow: 0 0 0 3px rgba(74, 139, 111, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.error-message {
  font-size: 0.85rem;
  color: var(--color-error);
  min-height: 1.2em;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== Form Success ===== */
.form-success {
  background: #e6f7ed;
  border: 1px solid #a3d9b1;
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
}

.form-success p {
  color: #1b5e3a;
  font-weight: 600;
  margin: 0;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-green-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-logo {
  height: 44px;
  width: auto;
  margin-bottom: var(--spacing-sm);
  filter: brightness(0) invert(1);
}

.footer-tagline {
  font-size: 0.95rem;
  color: var(--color-green-accent);
  font-weight: 500;
}

.footer-address h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer-address p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
}

.footer-address a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.footer-address a:hover {
  color: var(--color-green-accent);
}

.footer-links h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-green-accent);
}

.footer-eho {
  text-align: center;
  padding: var(--spacing-xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.eho-logo {
  display: inline-block;
  width: 40px;
  height: 40px;
  margin-bottom: var(--spacing-sm);
}

.eho-statement {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.03em;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--spacing-sm);
}

.independently-maintained {
  font-size: 0.8rem;
  line-height: 1.5;
  max-width: 680px;
  margin: 0 auto var(--spacing-md);
  color: rgba(255, 255, 255, 0.5);
}

.disclaimer {
  font-size: 0.75rem;
  line-height: 1.5;
  max-width: 680px;
  margin: 0 auto;
}

/* ===== Responsive: Tablet+ ===== */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-list {
    display: flex;
  }

  .hero-layout {
    grid-template-columns: auto 1fr;
  }

  .hero-image img {
    width: 340px;
    height: 340px;
  }

  .hero-content {
    text-align: left;
  }

  .hero-actions {
    justify-content: flex-start;
  }

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

  .about-layout {
    grid-template-columns: 1fr 2fr;
  }

  .contact-layout {
    grid-template-columns: 1fr 1.5fr;
  }

  .footer-layout {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

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

/* ===== Mobile Nav ===== */
@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  }

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

  .nav-list a {
    font-size: 1.1rem;
    padding: var(--spacing-sm) 0;
  }

  .hero-image img {
    width: 220px;
    height: 220px;
  }
}

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

  html {
    scroll-behavior: auto;
  }
}