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

:root {
  --bg: hsl(220, 25%, 6%);
  --fg: hsl(210, 40%, 95%);
  --card: hsl(220, 20%, 10%);
  --primary: hsl(152, 70%, 50%);
  --primary-fg: hsl(220, 25%, 6%);
  --accent: hsl(185, 70%, 45%);
  --muted: hsl(215, 15%, 55%);
  --border: hsl(215, 20%, 18%);
  --radius: 0.75rem;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --gradient-primary: linear-gradient(135deg, hsl(152, 70%, 50%), hsl(185, 70%, 45%));
  --shadow-card: 0 4px 30px hsl(0, 0%, 0%, 0.3);
  --glow: 0 0 30px hsl(152, 70%, 50%, 0.4);
  --glow-hover: 0 0 50px hsl(152, 70%, 50%, 0.6);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-display); }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  border-bottom: 1px solid hsl(215, 20%, 18%, 0.3);
  background: hsl(220, 25%, 6%, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
}

.navbar-brand svg {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  border-radius: 4px;
  object-fit: contain;
}

.hero-logo {
  width: clamp(4rem, 10vw, 6rem);
  height: auto;
  border-radius: 0.75rem;
  margin: 0 auto 1.5rem;
  display: block;
  filter: drop-shadow(0 0 40px hsl(152, 70%, 50%, 0.3));
  animation: floatLogo 4s ease-in-out infinite;
}

@keyframes floatLogo {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.footer-brand .brand-logo {
  width: 3rem;
  height: 3rem;
}

.navbar-links {
  display: none;
  list-style: none;
  gap: 2rem;
}

.navbar-links a {
  font-size: 0.875rem;
  color: var(--muted);
  transition: color 0.2s;
}
.navbar-links a:hover { color: var(--fg); }

.navbar-actions { display: flex; align-items: center; gap: 0.75rem; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.025em;
  border-radius: calc(var(--radius) - 2px);
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
  box-shadow: var(--glow);
}
.btn-primary:hover {
  background: hsl(152, 70%, 45%);
  box-shadow: var(--glow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid hsl(152, 70%, 50%, 0.5);
}
.btn-outline:hover { background: hsl(152, 70%, 50%, 0.1); }

.btn-lg { padding: 0.875rem 2rem; font-size: 1rem; }

/* === Hero === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-bg .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, hsl(220, 25%, 6%, 0.6), hsl(220, 25%, 6%, 0.4), var(--bg));
}

.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: hsl(152, 70%, 50%, 0.1);
  filter: blur(120px);
  animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 56rem;
  padding: 0 1rem;
}

.hero-badge {
  display: inline-block;
  margin-bottom: 1.5rem;
  padding: 0.375rem 1rem;
  border-radius: 9999px;
  border: 1px solid hsl(152, 70%, 50%, 0.3);
  background: hsl(152, 70%, 50%, 0.05);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: clamp(0.95rem, 1.5vw, 1.125rem);
  color: var(--muted);
  max-width: 42rem;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

/* === Sections === */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-label {
  display: block;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  text-align: center;
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 4rem;
}

/* === Glass Cards === */
.glass-card {
  border: 1px solid hsl(215, 20%, 18%, 0.5);
  background: hsl(220, 20%, 10%, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color 0.3s;
}
.glass-card:hover { border-color: hsl(152, 70%, 50%, 0.3); }

.glass-card .card-icon {
  width: 3rem;
  height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  background: hsl(152, 70%, 50%, 0.1);
  color: var(--primary);
  margin-bottom: 1.25rem;
  transition: box-shadow 0.3s;
}
.glass-card:hover .card-icon {
  box-shadow: 0 0 20px hsl(152, 70%, 50%, 0.2);
}

.glass-card .card-icon svg { width: 1.5rem; height: 1.5rem; }

.glass-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.glass-card p { color: var(--muted); line-height: 1.7; }

/* Challenge cards use accent color icon */
.challenge-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

/* === Grid layouts === */
.grid-2 { display: grid; gap: 1.5rem; }
.grid-3 { display: grid; gap: 1.5rem; }
.grid-4 { display: grid; gap: 1.5rem; }

/* === Benefits === */
.benefit-item {
  text-align: center;
  padding: 2rem;
}

.benefit-icon {
  width: 3.5rem;
  height: 3.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: hsl(152, 70%, 50%, 0.1);
  color: var(--primary);
  margin-bottom: 1.25rem;
}

.benefit-icon svg { width: 1.75rem; height: 1.75rem; }

.benefit-item h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.benefit-item p {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* === CTA / Contact === */
.cta-section {
  padding: 6rem 0;
  position: relative;
  text-align: center;
}

.cta-glow {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  border-radius: 50%;
  background: hsl(152, 70%, 50%, 0.1);
  filter: blur(120px);
  pointer-events: none;
}

.cta-section h2 {
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 2rem;
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn { font-size: 1.125rem; padding: 1rem 2.5rem; }

/* === Section glows === */
.section-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  border-radius: 50%;
  background: hsl(152, 70%, 50%, 0.05);
  filter: blur(150px);
  pointer-events: none;
}


/* === Stats Section === */
.stats-section {
  padding: 4rem 0;
  border-top: 1px solid hsl(215, 20%, 18%, 0.3);
  border-bottom: 1px solid hsl(215, 20%, 18%, 0.3);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* === Contact Form === */
.cta-subtitle {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.contact-form {
  max-width: 32rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: hsl(220, 20%, 10%, 0.6);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.875rem;
  transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.contact-form textarea { resize: vertical; }

.contact-form .btn { align-self: center; }

/* === Footer (upgraded) === */
.footer {
  padding: 3rem 0 1.5rem;
  border-top: 1px solid hsl(215, 20%, 18%, 0.3);
}

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

.footer-brand .navbar-brand { margin-bottom: 0.75rem; }

.footer-tagline {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-links h4 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--fg); }

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid hsl(215, 20%, 18%, 0.3);
}

.footer-bottom p {
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
}

/* === Mobile Menu Toggle === */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: 0.2s;
}

/* === Responsive === */
@media (min-width: 768px) {
  .navbar-links { display: flex; }
  .menu-toggle { display: none; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 8rem 0; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 767px) {
  .navbar-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 4rem; left: 0; right: 0;
    background: hsl(220, 25%, 8%, 0.97);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .btn-nav-hide { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

/* === Animations (fade-in on scroll) === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}