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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ===== SECTION SPACING ===== */
.section {
  padding: 5rem 0;
}

@media (max-width: 640px) {
  .section {
    padding: 3.5rem 0;
  }
}

/* ===== NAV ===== */
.nav {
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.nav.scrolled {
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.95);
}

.nav-link, .mobile-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #0d9488;
  transition: width 0.2s ease;
  border-radius: 1px;
}

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

/* Mobile menu */
.mobile-menu {
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #134e4a 0%, #0f766e 40%, #115e59 100%);
  position: relative;
}

.hero-bg {
  background-image: url('https://images.pexels.com/photos/5427831/pexels-photo-5427831.jpeg?auto=compress&cs=tinysrgb&fit=crop&w=1920&h=1080');
  background-size: cover;
  background-position: center;
  filter: brightness(0.3);
}

.hero-pattern {
  background-image: radial-gradient(circle at 25% 25%, rgba(255,255,255,0.05) 1px, transparent 1px),
                    radial-gradient(circle at 75% 75%, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #14b8a6, #0d9488);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 15px rgba(13, 148, 136, 0.3);
  text-align: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(13, 148, 136, 0.4);
  background: linear-gradient(135deg, #2dd4bf, #14b8a6);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
  backdrop-filter: blur(4px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

/* ===== INPUTS ===== */
.input {
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  color: #1e293b;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  outline: none;
}

.input:focus {
  border-color: #14b8a6;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.input::placeholder {
  color: #94a3b8;
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* Default state: visible (progressive enhancement) */
.reveal-card {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
  }

  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }

  .reveal-card {
    opacity: 0;
    transform: translateY(20px);
  }

  .reveal-card.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== CTA SECTION ===== */
.cta-pattern {
  background-image: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.08) 0%, transparent 50%),
                    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
}

/* ===== DECORATIVE FLOATS ===== */
.hero-float-1, .hero-float-2, .hero-float-3 {
  animation: float 6s ease-in-out infinite;
}

.hero-float-2 {
  animation-delay: -2s;
  animation-duration: 8s;
}

.hero-float-3 {
  animation-delay: -4s;
  animation-duration: 7s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

.cta-float-1, .cta-float-2 {
  animation: floatSlow 10s ease-in-out infinite;
}

.cta-float-2 {
  animation-delay: -5s;
}

@keyframes floatSlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(15px, -15px); }
}

/* ===== SCROLL BAR ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f0fdfa;
}

::-webkit-scrollbar-thumb {
  background: #99f6e4;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #5eead4;
}

/* ===== SELECTION ===== */
::selection {
  background: #99f6e4;
  color: #134e4a;
}