:root {
  --bg: #050816;
  --bg-soft: #0b1020;
  --accent: #4ade80;
  --accent-soft: rgba(74, 222, 128, 0.08);
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --border-subtle: #1f2933;
  --card-bg: #0b1120;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 45%, #000 100%);
  color: var(--text-main);
}

/* Layout helpers */

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 64px 0;
}

.section-accent {
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.08), transparent);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(2, 6, 23, 0.95),
    rgba(2, 6, 23, 0.85),
    transparent
  );
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-main);
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: 0.18s ease;
}

.nav-link:hover {
  color: var(--text-main);
  border-color: rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.9);
}

.nav-link.active {
  color: #0b1120;
  background: var(--accent);
  border-color: var(--accent);
}

/* Hero */

.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.3rem, 4vw, 2.8rem);
  margin: 0 0 14px;
}

.hero-text p {
  margin: 0 0 20px;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-card {
  background: radial-gradient(circle at top left, #111827, #020617);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.9);
}

.hero-card h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.hero-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-muted);
}

.hero-card li {
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}

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

/* Buttons & links */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: 0.18s ease;
}

.btn.primary {
  background: var(--accent);
  color: #020617;
  border-color: var(--accent);
}

.btn.primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  border-color: rgba(148, 163, 184, 0.4);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 1);
}

.link-inline {
  font-size: 0.9rem;
  color: var(--accent);
  text-decoration: none;
}

.link-inline:hover {
  text-decoration: underline;
}

/* Cards */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 18px 18px 16px;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.75);
}

.card h3,
.card h2 {
  margin-top: 0;
  margin-bottom: 8px;
}

.card p {
  margin: 0 0 10px;
  color: var(--text-muted);
}

.card-link {
  font-size: 0.9rem;
  color: var(--accent);
  text-decoration: none;
}

.card-link:hover {
  text-decoration: underline;
}

/* Section headers */

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.section-header h2 {
  margin: 0;
}

/* CTA */

.cta-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.cta-actions {
  display: flex;
  gap: 12px;
}

/* Page-specific layouts */

.page-intro {
  margin-top: 6px;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-list li {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 4px 9px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
}

.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-muted);
}

.bullet-list li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 6px;
}

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

.section-subheading {
  margin-top: 24px;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
  margin-top: 18px;
}

.contact-form .form-group {
  margin-bottom: 12px;
}

.contact-form label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  padding: 8px 10px;
  background: rgba(15, 23, 42, 0.95);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.form-note {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.mono {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  padding: 18px 0 22px;
  background: radial-gradient(circle at top, #020617, #000);
  margin-top: 32px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 10px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

/* Responsive */

@media (max-width: 768px) {
  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

/* Contact Modal */

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 32px;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.9);
  max-width: 500px;
  width: 90%;
  position: relative;
  animation: modalFadeIn 0.2s ease;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-close {
  position: absolute;
  right: 20px;
  top: 20px;
  font-size: 28px;
  font-weight: bold;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  transition: color 0.18s ease;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-content h2 {
  margin-top: 0;
  margin-bottom: 12px;
}

.modal-content p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.contact-email {
  margin-top: 16px;
}

.contact-email a {
  font-size: 1.1rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.18s ease;
}

.contact-email a:hover {
  color: #6ee7b7;
  text-decoration: underline;
}