/* ============================================
   SKYFRAME INNOVATIONS — SHARED STYLES 2026
   Brand: Yellow #ffff00, Cyan #00ffff, Dark
============================================ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --yellow: #ffff00;
  --cyan: #00ffff;
  --black: #000000;
  --dark: #0a0a0a;
  --dark-card: #111111;
  --text-muted: #999999;
  --text-body: #cccccc;
  --text-bright: #ffffff;
  --yellow-glow: rgba(255, 255, 0, 0.25);
  --cyan-glow: rgba(0, 255, 255, 0.25);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--black);
  color: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4 {
  font-family: 'Roboto Slab', serif;
  color: var(--text-bright);
  line-height: 1.15;
}

a {
  color: inherit;
  text-decoration: none;
}

.accent {
  color: var(--yellow);
}

.accent-cyan {
  color: var(--cyan);
}

/* --- LAYOUT UTILITIES --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
}

.section-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 1.5rem;
}

/* --- NAVIGATION --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

.nav.scrolled {
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 0, 0.1);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-logo span {
  font-family: 'Roboto Slab', serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-body);
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--yellow);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--yellow);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--yellow);
}

.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 0.6rem 1.5rem;
  border: 1.5px solid var(--yellow);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--yellow) !important;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: var(--yellow);
  color: var(--black) !important;
  box-shadow: 0 0 20px var(--yellow-glow);
}

.nav-cta::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-bright);
  transition: 0.3s;
}

/* --- BUTTONS --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--yellow);
  color: var(--black);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  box-shadow: 0 0 24px var(--yellow-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: transparent;
  color: var(--text-bright);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px;
  border: 1.5px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
  transform: translateY(-2px);
}

.btn-arrow {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow,
.btn-secondary:hover .btn-arrow {
  transform: translateX(4px);
}

/* --- PAGE HERO (sub pages) --- */
.page-hero {
  padding: 10rem 0 5rem;
  background: radial-gradient(ellipse at 30% 50%, #111 0%, #000 70%);
  position: relative;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* --- CARDS --- */
.card {
  background: var(--dark-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  border-color: rgba(255, 255, 0, 0.15);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

/* --- FORMS (shared) --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--dark-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-bright);
  font-family: 'Inter', sans-serif;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #555;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--yellow);
  box-shadow: 0 0 12px var(--yellow-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-submit {
  align-self: flex-start;
  padding: 0.85rem 2.5rem;
  background: var(--yellow);
  color: var(--black);
  font-weight: 600;
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.form-submit:hover {
  box-shadow: 0 0 24px var(--yellow-glow);
  transform: translateY(-2px);
}

.form-submit:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* --- FOOTER --- */
.footer {
  background: var(--dark-card);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-col h4 {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-body);
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--yellow);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  color: var(--text-muted);
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
}

.social-links a:hover {
  color: var(--yellow);
}

.social-links svg {
  width: 20px;
  height: 20px;
}

/* --- REVEAL ANIMATIONS --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-80px);
}

.reveal-right {
  opacity: 0;
  transform: translateX(80px);
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 5rem 0;
  }
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 999;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }
  .page-hero {
    padding: 8rem 0 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}