/* ============================================
   NextGen Coders — Shared Styles
   Design: Deep navy + electric indigo + cyan
   Font: Space Grotesk (display) + Inter (body)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --navy:       #0A0F1E;
  --navy-2:     #0F1629;
  --navy-3:     #141C35;
  --indigo:     #4F46E5;
  --indigo-l:   #6366F1;
  --cyan:       #06B6D4;
  --cyan-l:     #22D3EE;
  --white:      #F0F4FF;
  --muted:      #8892B0;
  --border:     rgba(99,102,241,0.2);
  --glow:       0 0 30px rgba(79,70,229,0.3);
  --glow-cyan:  0 0 30px rgba(6,182,212,0.3);
  --radius:     12px;
  --radius-lg:  20px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--navy);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── TYPOGRAPHY ─────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
p  { color: var(--muted); font-size: 1rem; line-height: 1.7; }

/* ── NAVBAR ─────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10,15,30,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  padding: 0.75rem 2rem;
  background: rgba(10,15,30,0.95);
}
.nav-brand {
  display: flex;
  flex-direction: column;
}
.nav-brand .brand-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--white);
  text-decoration: none;
  background: linear-gradient(135deg, var(--indigo-l), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-brand .brand-sub {
  font-size: 0.65rem;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
  font-weight: 500;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--white);
  background: rgba(79,70,229,0.15);
}
.nav-links .btn-nav {
  background: var(--indigo);
  color: var(--white) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 8px;
}
.nav-links .btn-nav:hover {
  background: var(--indigo-l) !important;
  box-shadow: var(--glow);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── BUTTONS ────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--indigo), #7C3AED);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,70,229,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(79,70,229,0.6);
}
.btn-cyan {
  background: linear-gradient(135deg, var(--cyan), #0891B2);
  color: #fff;
  box-shadow: 0 4px 20px rgba(6,182,212,0.4);
}
.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6,182,212,0.6);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--indigo);
  background: rgba(79,70,229,0.1);
}
.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

/* ── CARDS ──────────────────────────────── */
.card {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
  position: relative;
}
.card:hover {
  border-color: rgba(99,102,241,0.5);
  transform: translateY(-4px);
  box-shadow: var(--glow);
}
.card-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--indigo), var(--cyan));
  opacity: 0;
  z-index: -1;
  transition: var(--transition);
}
.card-glow:hover::before { opacity: 0.15; }

/* ── SECTIONS ───────────────────────────── */
.section {
  padding: 5rem 0;
}
.section-sm { padding: 3rem 0; }
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.2);
  padding: 0.35rem 0.9rem;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}
.section-title { margin-bottom: 1rem; }
.section-desc { max-width: 580px; margin-bottom: 2.5rem; }

/* ── GRADIENT TEXT ──────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--indigo-l) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-warm {
  background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── BADGE / TAG ────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.8rem;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-indigo {
  background: rgba(79,70,229,0.15);
  color: var(--indigo-l);
  border: 1px solid rgba(79,70,229,0.25);
}
.badge-cyan {
  background: rgba(6,182,212,0.12);
  color: var(--cyan-l);
  border: 1px solid rgba(6,182,212,0.25);
}
.badge-green {
  background: rgba(16,185,129,0.12);
  color: #34D399;
  border: 1px solid rgba(16,185,129,0.25);
}

/* ── DIVIDERS ───────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0;
  border: none;
}

/* ── FORMS ──────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--navy-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}
.form-group select option { background: var(--navy-2); }
.form-error {
  color: #EF4444;
  font-size: 0.78rem;
  margin-top: 0.3rem;
  display: none;
}
.form-group.error input,
.form-group.error select { border-color: #EF4444; }
.form-group.error .form-error { display: block; }

/* ── GRID HELPERS ───────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }

/* ── FOOTER ─────────────────────────────── */
footer {
  background: var(--navy-2);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  text-align: center;
}
footer p { color: var(--muted); font-size: 0.85rem; margin: 0.25rem 0; }
footer a { color: var(--indigo-l); text-decoration: none; }
footer a:hover { color: var(--cyan); }

/* ── TOAST ──────────────────────────────── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--navy-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  max-width: 360px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: rgba(16,185,129,0.4); }
.toast.error   { border-color: rgba(239,68,68,0.4); }

/* ── LOADING SPINNER ────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── GLOW ORBS (ambient bg) ─────────────── */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.35;
}
.orb-indigo { background: var(--indigo); }
.orb-cyan   { background: var(--cyan); }

/* ── SCROLL REVEAL ──────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ─────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--navy-2);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 0.25rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; text-align: center; }
  .hamburger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 3.5rem 0; }
}
@media (max-width: 480px) {
  .btn-lg { padding: 0.85rem 1.75rem; font-size: 0.95rem; }
}