/* =============================================
   GrassRoots Crypto - Minimal Single Page

   Colour palette derived from logo:
   Navy  #163252 → headings, footer bg
   Blue  #0092ca → primary CTA, links (Ethereum)
   Green #3daa78 → secondary accent (Tether)
   Gold  #d4a643 → tertiary highlights (Bitcoin)
   ============================================= */

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

:root {
  /* Logo-derived palette */
  --navy: #163252;
  --blue: #0092ca;
  --blue-hover: #0080b3;
  --green: #3daa78;
  --gold: #d4a643;

  /* Text - navy-tinted, not generic grey */
  --text: #1e3347;
  --text-mid: #4a6178;
  --text-light: #7a8ea0;

  /* Backgrounds */
  --bg: #ffffff;
  --bg-alt: #f4f7fa;
  --card-bg: #ffffff;

  /* Borders - navy-tinted */
  --border: #dce3ea;

  /* Footer - brand navy */
  --footer-bg: #163252;
  --footer-text: #8da3ba;
  --footer-heading: #d6e0ea;

  /* Shared */
  --radius: 6px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  /* Dark navy backgrounds - brand-derived, not generic black */
  --bg: #0c1929;
  --bg-alt: #112034;
  --card-bg: #152842;

  /* Text */
  --text: #dce4ee;
  --text-mid: #8da3ba;
  --text-light: #5e7a94;

  /* Accents - slightly lifted for dark bg contrast */
  --blue: #2eb5f0;
  --blue-hover: #58c5f5;
  --green: #4fbe8a;
  --gold: #e8c05a;

  /* Borders */
  --border: #1e3a54;

  /* Footer */
  --footer-bg: #081320;
  --footer-text: #5e7a94;
  --footer-heading: #8da3ba;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}

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

a:hover {
  color: var(--blue-hover);
}

ul {
  list-style: none;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

.btn-primary:hover {
  background: var(--blue-hover);
  border-color: var(--blue-hover);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-alt);
  border-color: var(--text-mid);
  color: var(--text);
}

.btn-full {
  width: 100%;
}

/* ---------- Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition:
    box-shadow var(--transition),
    background 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 1px 12px rgba(22, 50, 82, 0.08);
}

[data-theme="dark"] .site-header.scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--navy);
}

[data-theme="dark"] .nav-logo {
  color: var(--text);
}

.nav-logo:hover {
  color: var(--navy);
}

[data-theme="dark"] .nav-logo:hover {
  color: var(--text);
}

.nav-logo img {
  border-radius: 4px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 6px 14px;
  color: var(--text-mid);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-alt);
}

.nav-cta {
  background: var(--blue);
  color: #fff !important;
  margin-left: 8px;
}

.nav-cta:hover {
  background: var(--blue-hover) !important;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text-mid);
  cursor: pointer;
  transition: all var(--transition);
}

.theme-toggle:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.theme-toggle .icon-moon {
  display: none;
}
.theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}
[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: background var(--transition);
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: all var(--transition);
}

.hamburger::before {
  top: -6px;
}
.hamburger::after {
  top: 6px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}
.nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle.active .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  padding: 140px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

[data-theme="dark"] .hero h1 {
  color: var(--text);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-mid);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Services ---------- */
.services {
  padding: 80px 0;
  background: var(--bg-alt);
  transition: background 0.3s ease;
}

.section-intro {
  margin-bottom: 48px;
}

.section-intro h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

[data-theme="dark"] .section-intro h2 {
  color: var(--text);
}

.section-intro p {
  font-size: 1rem;
  color: var(--text-mid);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-block {
  padding: 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-top: 3px solid var(--blue);
  transition:
    box-shadow var(--transition),
    transform var(--transition),
    background 0.3s ease;
}

/* Alternate accent colours on service cards */
.service-block:nth-child(1) {
  border-top-color: var(--gold);
}
.service-block:nth-child(2) {
  border-top-color: var(--blue);
}
.service-block:nth-child(3) {
  border-top-color: var(--green);
}
.service-block:nth-child(4) {
  border-top-color: var(--gold);
}

.service-block:hover {
  box-shadow: 0 4px 24px rgba(22, 50, 82, 0.1);
  transform: translateY(-2px);
}

[data-theme="dark"] .service-block:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.service-block h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 14px;
}

[data-theme="dark"] .service-block h3 {
  color: var(--text);
}

.service-block ul {
  list-style: none;
}

.service-block li {
  padding: 5px 0;
  font-size: 0.92rem;
  color: var(--text-mid);
  padding-left: 16px;
  position: relative;
}

.service-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.services-cta {
  margin-top: 40px;
  text-align: center;
}

/* ---------- About ---------- */
.about {
  padding: 80px 0;
}

.about h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

[data-theme="dark"] .about h2 {
  color: var(--text);
}

.about-layout {
  display: grid;
  gap: 48px;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 12px;
  max-width: 640px;
}

.about-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
  min-width: 100px;
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue);
  line-height: 1;
}

/* Alternate stat colours */
.stat:nth-child(1) .stat-num {
  color: var(--blue);
}
.stat:nth-child(2) .stat-num {
  color: var(--gold);
}
.stat:nth-child(3) .stat-num {
  color: var(--green);
}
.stat:nth-child(4) .stat-num {
  color: var(--blue);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
  margin-top: 4px;
  display: block;
}

.about-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.detail-block h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 10px;
}

[data-theme="dark"] .detail-block h3 {
  color: var(--text);
}

.detail-block li {
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--text-mid);
  padding-left: 14px;
  position: relative;
}

.detail-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

/* ---------- Contact ---------- */
.contact {
  padding: 80px 0;
  background: var(--bg-alt);
  transition: background 0.3s ease;
}

.contact h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

[data-theme="dark"] .contact h2 {
  color: var(--text);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-text > p {
  font-size: 1rem;
  color: var(--text-mid);
  margin-bottom: 32px;
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

[data-theme="dark"] .contact-item h3 {
  color: var(--text);
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-mid);
  margin-bottom: 10px;
}

.email-link {
  font-size: 0.95rem;
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-mid);
  transition: all var(--transition);
}

.social-links a:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

/* Contact form */
.contact-form {
  background: var(--card-bg);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background 0.3s ease;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg);
  transition:
    border-color var(--transition),
    background 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(0, 146, 202, 0.15);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus,
[data-theme="dark"] .form-group textarea:focus {
  box-shadow: 0 0 0 2px rgba(46, 181, 240, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-status {
  margin-top: 10px;
  font-size: 0.85rem;
  text-align: center;
}

.form-status.success {
  color: var(--green);
}
.form-status.error {
  color: #cf222e;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--footer-bg);
  padding: 40px 0;
  transition: background 0.3s ease;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--footer-heading);
}

.footer-brand img {
  border-radius: 4px;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--footer-text);
  font-size: 0.85rem;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--footer-text);
}

/* ---------- Fade-in ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   Sub-page styles (About, Disclaimer, Terms)
   ============================================= */

.page-content {
  padding: 120px 0 80px;
}

.page-content h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

[data-theme="dark"] .page-content h1 {
  color: var(--text);
}

.page-content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--navy);
  margin-top: 40px;
  margin-bottom: 12px;
}

[data-theme="dark"] .page-content h2 {
  color: var(--text);
}

.page-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-top: 28px;
  margin-bottom: 8px;
}

[data-theme="dark"] .page-content h3 {
  color: var(--text);
}

.page-content p {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 12px;
  max-width: 720px;
}

.page-content ul,
.page-content ol {
  margin-bottom: 16px;
  max-width: 720px;
}

.page-content li {
  padding: 4px 0;
  padding-left: 16px;
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.7;
  position: relative;
}

.page-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

.page-content ol {
  list-style: decimal;
  padding-left: 20px;
}

.page-content ol li {
  padding-left: 4px;
}

.page-content ol li::before {
  display: none;
}

.legal-notice {
  background: var(--bg-alt);
  border-left: 4px solid var(--gold);
  padding: 20px 24px;
  margin-bottom: 24px;
  font-size: 0.9rem;
  max-width: 720px;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: 0 1px 4px rgba(22, 50, 82, 0.06);
  transition:
    background 0.3s ease,
    box-shadow 0.3s ease;
}

[data-theme="dark"] .legal-notice {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.legal-notice strong {
  color: var(--navy);
}

[data-theme="dark"] .legal-notice strong {
  color: var(--gold);
}

.legal-meta {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.page-cta {
  margin-top: 48px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: var(--bg);
    flex-direction: column;
    padding: 72px 24px 24px;
    gap: 4px;
    border-left: 1px solid var(--border);
    transition: right var(--transition);
    z-index: 999;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95rem;
  }

  .nav-cta {
    margin-left: 0;
    text-align: center;
    margin-top: 8px;
  }

  .hero {
    padding: 110px 0 60px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

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

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

  .about-stats {
    justify-content: flex-start;
  }

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

  .page-content {
    padding: 100px 0 60px;
  }

  .page-content h1 {
    font-size: 1.8rem;
  }

  .page-content h2 {
    font-size: 1.2rem;
    margin-top: 32px;
  }

  .page-cta {
    flex-direction: column;
  }

  .page-cta .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: center;
  }

  .hero-ctas .btn {
    width: 100%;
    max-width: 260px;
  }

  .about-stats {
    gap: 20px;
  }

  .stat-num {
    font-size: 1.6rem;
  }

  .page-content {
    padding: 90px 0 50px;
  }

  .page-content h1 {
    font-size: 1.5rem;
  }

  .legal-notice {
    padding: 16px 18px;
    font-size: 0.85rem;
  }
}