/* ============================================
   Olive Global Institute – Static site styles
   Brand: blue, green, white
   ============================================ */

:root {
  /* Brand */
  --green-dark: #1a5f3c;
  --green-mid: #2d8a5a;
  --green-light: #3fa76b;
  --blue-dark: #0d3b66;
  --blue-mid: #1a5f8a;
  --blue-light: #2d7ab8;
  --white: #ffffff;
  --off-white: #f8faf9;
  --gray-100: #e8eeec;
  --gray-200: #c5d1cc;
  --gray-600: #4a5c56;
  --gray-800: #2a3532;
  --gray-900: #1a211f;

  /* Placeholder styling – obvious so you can find and replace */
  --placeholder-bg: #fef9e7;
  --placeholder-border: #b7950b;
  --placeholder-text: #7d6910;

  /* Layout */
  --container: min(90vw, 1100px);
  --section-padding: clamp(3rem, 6vw, 5rem);
  --header-height: 4.5rem;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(26, 95, 60, 0.08);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--white);
}

/* Placeholders – clearly visible so you know what to replace */
.placeholder {
  display: inline;
  background: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: 4px;
  padding: 0.15em 0.35em;
  color: var(--placeholder-text);
  font-style: italic;
}

/* Skip link (accessibility) */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0.5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--green-dark);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-100);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: block;
}
.logo img {
  display: block;
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition);
}
.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: var(--gray-100);
}
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--green-dark);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.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);
}

.main-nav {
  display: none;
}
.main-nav.is-open {
  display: block;
}
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.main-nav a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--gray-800);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--green-dark);
  background: var(--gray-100);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
  .main-nav {
    display: block;
  }
  .main-nav ul {
    flex-direction: row;
    gap: 0.25rem;
  }
  .main-nav a {
    padding: 0.5rem 1rem;
  }
}

/* Hero */
.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--section-padding) 1.5rem;
  background: linear-gradient(180deg, rgba(26, 33, 31, 0.55) 0%, rgba(26, 33, 31, 0.65) 100%),
    url("../base_assets/bg.jpg") center / cover no-repeat;
  position: relative;
}

.hero-inner {
  max-width: 640px;
}

.hero h1 {
  font-family: "Playfair Display", serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--white);
  margin: 0 0 0.25em;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--gray-100);
  font-weight: 500;
  margin: 0 0 1em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-intro {
  font-size: 1.1rem;
  color: var(--gray-100);
  margin: 0 0 2rem;
  line-height: 1.7;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--green-dark);
  color: var(--white);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--green-mid);
  color: var(--white);
}
.btn-secondary {
  background: transparent;
  color: var(--green-dark);
  border: 2px solid var(--green-dark);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--green-dark);
  color: var(--white);
}

.hero .btn-secondary {
  color: var(--white);
  border-color: var(--white);
}
.hero .btn-secondary:hover,
.hero .btn-secondary:focus-visible {
  background: var(--white);
  color: var(--green-dark);
  border-color: var(--white);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--gray-100);
}
.hero-scroll-icon {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: var(--green-light);
  border-radius: 50%;
  animation: scroll-bounce 2s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Sections */
.section {
  padding: var(--section-padding) 1.5rem;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
}

.section h2 {
  font-family: "Playfair Display", serif;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  color: var(--green-dark);
  margin: 0 0 1rem;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--gray-600);
  margin: 0 0 2rem;
  max-width: 60ch;
}

/* About */
.about {
  background: var(--white);
}
.about-content p {
  margin: 0 0 1rem;
  max-width: 65ch;
}
.about-content p:last-child {
  margin-bottom: 0;
}

/* Services */
.services {
  background: var(--off-white);
}

.services-grid {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background: var(--white);
  padding: 1.75rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  box-shadow: 0 8px 28px rgba(26, 95, 60, 0.12);
  border-color: var(--green-light);
}
.service-card .card-icon {
  display: block;
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--green-dark);
}
.service-card .card-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}
.service-card h3 {
  font-size: 1.2rem;
  color: var(--green-dark);
  margin: 0 0 0.5rem;
}
.service-card p {
  margin: 0;
  color: var(--gray-600);
  font-size: 0.95rem;
}

.section-note {
  font-size: 0.95rem;
  color: var(--gray-600);
  margin: 0;
}

/* Contact */
.contact {
  background: var(--white);
}

.contact-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.contact-block {
  padding: 1.25rem;
  background: var(--off-white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-100);
}
.contact-block .block-icon {
  display: block;
  width: 32px;
  height: 32px;
  margin-bottom: 0.75rem;
  color: var(--green-dark);
}
.contact-block .block-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}
.contact-block h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--green-dark);
  margin: 0 0 0.5rem;
}
.contact-block address,
.contact-block p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--gray-800);
}
.contact-block a {
  color: var(--blue-mid);
  text-decoration: none;
}
.contact-block a:hover,
.contact-block a:focus-visible {
  text-decoration: underline;
}

/* Footer */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-200);
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
}

.footer-brand {
  font-weight: 600;
  color: var(--white);
  margin: 0 0 0.25rem;
}
.footer-reg {
  font-size: 0.85rem;
  margin: 0 0 0.5rem;
}
.footer-copy {
  font-size: 0.85rem;
  margin: 0;
  opacity: 0.9;
}