:root {
  --bg: #050816;
  --bg-alt: #071523;
  --card-bg: #0b1f33;
  --accent: #16c79a;
  --accent-soft: rgba(22, 199, 154, 0.2);
  --accent-strong: #11a27e;
  --text-main: #f5f7fb;
  --text-muted: #a7b4c8;
  --border-soft: rgba(255, 255, 255, 0.08);
  --shadow-soft: 0 14px 40px rgba(0, 0, 0, 0.45);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition-fast: 0.2s ease;
  --max-width: 1120px;
  --header-height: 72px;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #0b2340 0, #030711 55%, #000000 100%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

/* UTILITIES */
.container {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 1.5rem;
  margin: 0 auto;
}

.section {
  padding: 4.5rem 0;
}

.section.alt {
  background: rgba(255, 255, 255, 0.02);
}

.section-header {
  text-align: center;
  margin-bottom: 2.75rem;
}

.section-header h2 {
  font-size: 2rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0.25rem auto 0;
}

/* HEADER / NAV */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(3, 5, 12, 0.9), rgba(3, 5, 12, 0.75));
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nav-container {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 15%, #5ef5cf, #16c79a 40%, #0b7458 100%);
  box-shadow: 0 0 24px rgba(22, 199, 154, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #021014;
  font-size: 1.1rem;
}

.logo-text {
  font-weight: 650;
  letter-spacing: 0.04em;
  font-size: 1.05rem;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-main);
  transform: translateY(-1px);
}

.nav-donate {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 500;
}

.nav-donate:hover {
  background: var(--accent);
  color: #021014;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-toggle .bar {
  width: 1.5rem;
  height: 2px;
  background: var(--text-main);
  display: block;
  margin: 0.25rem 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* HERO */
.hero {
  padding: 4.5rem 0 4rem;
  background: radial-gradient(circle at top center, rgba(22,199,154,0.12), transparent 80%);
}

.hero-inner {
  display: grid;
  gap: 2.5rem;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-text p {
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #021014;
  box-shadow: 0 14px 40px rgba(22, 199, 154, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 45px rgba(22, 199, 154, 0.55);
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.03);
}

.hero-highlight {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  background:
    radial-gradient(circle at top left, rgba(22, 199, 154, 0.12), transparent 55%),
    linear-gradient(to bottom right, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.4));
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-soft);
}

.hero-badge {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #aeeedd;
  margin-bottom: 0.8rem;
}

.hero-highlight p {
  margin: 0.3rem 0;
  color: var(--text-main);
}

/* GRID / LAYOUT COMPONENTS */
.two-column {
  display: grid;
  gap: 2rem;
}

.about-highlight {
  background: rgba(5, 16, 30, 0.9);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
}

.about-highlight h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.about-highlight ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.about-highlight li {
  padding-left: 1.4rem;
  position: relative;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.about-highlight li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52rem;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent);
}

/* Cards */
.grid-3 {
  display: grid;
  gap: 1.6rem;
}

.card {
  padding: 1.4rem 1.3rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, rgba(22, 199, 154, 0.08), rgba(5, 13, 26, 0.95));
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.65rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6);
  border-color: var(--accent-soft);
}

/* Impact */
.impact-grid {
  display: grid;
  gap: 1.6rem;
}

.impact-card {
  padding: 1.3rem 1.3rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: rgba(3, 7, 15, 0.9);
}

.impact-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.impact-card p {
  margin: 0;
  color: var(--text-muted);
}

/* Get involved */
.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.bullet-list li {
  margin-bottom: 0.5rem;
  padding-left: 1.3rem;
  position: relative;
  color: var(--text-muted);
}

.bullet-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.cta-box {
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--border-soft);
  background: radial-gradient(circle at top, rgba(22, 199, 154, 0.12), rgba(3, 10, 20, 0.96));
  box-shadow: var(--shadow-soft);
}

.cta-box h3 {
  margin-top: 0;
}

.email a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}

.email a:hover {
  text-decoration: underline;
}

/* Donate section */
.donate-section {
  padding: 4rem 0 4.5rem;
}

.donate-inner {
  border-radius: var(--radius-xl);
  padding: 1.9rem 1.6rem;
  border: 1px solid var(--border-soft);
  background:
    radial-gradient(circle at top right, rgba(22, 199, 154, 0.2), transparent 55%),
    linear-gradient(to bottom left, rgba(6, 15, 29, 0.96), rgba(0, 0, 0, 0.9));
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.donate-inner h2 {
  margin-top: 0;
  margin-bottom: 0.65rem;
}

.donate-inner p {
  color: var(--text-muted);
  margin: 0;
}

.donate-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 1.6rem 0 2rem;
  background: rgba(1, 3, 8, 0.95);
}

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

.footer-inner p {
  margin: 0.15rem 0;
  color: var(--text-muted);
}

.footer-tagline {
  font-size: 0.85rem;
}

/* Map */
.map-box {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  background: rgba(255,255,255,0.02);
}

.map-image {
  width: 100%;
  display: block;
}

/* Partners */
.partner-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-soft);
  padding: 1.4rem;
  text-align: center;
  border-radius: var(--radius-lg);
  font-weight: 500;
  color: var(--text-main);
  box-shadow: var(--shadow-soft);
}

/* Volunteer form */
.volunteer-form {
  display: grid;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.volunteer-form input,
.volunteer-form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: #fff;
  font-size: 1rem;
  outline: none;
}

.volunteer-form textarea {
  min-height: 120px;
  resize: vertical;
}

.status-message {
  text-align: center;
  margin-top: 1rem;
  color: var(--accent);
  font-weight: 500;
}

/* RESPONSIVE */
@media (min-width: 720px) {
  .hero-inner {
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
  }

  .two-column {
    grid-template-columns: 1.2fr 1fr;
  }

  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .impact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .donate-inner {
    grid-template-columns: 1.8fr 1.2fr;
    padding: 2rem 2.1rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    inset: var(--header-height) 1rem auto 1rem;
    background: rgba(4, 7, 16, 0.97);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 0.9rem 1.1rem;
    display: none;
    flex-direction: column;
    gap: 0.6rem;
    box-shadow: var(--shadow-soft);
  }

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

  .nav-toggle {
    display: block;
  }

  .hero {
    padding-top: 3.3rem;
  }
}

/* Hamburger animation */
.nav-toggle.nav-toggle-open .bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.nav-toggle-open .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.nav-toggle-open .bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}