/* =============================
ROOT VARIABLES (DESIGN SYSTEM)
============================= */
:root {
  /* Colors */
  --color-white: #ffffff;
  --color-blue: #01c0f2;
  --color-green: #1bb59f;

  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;

  /* Glass Backgrounds */
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-hover: rgba(255, 255, 255, 0.65);
  --glass-strong-bg: rgba(255, 255, 255, 0.75);
  --glass-nav-bg: rgba(255, 255, 255, 0.25);
  --glass-nav-scroll-bg: rgba(255, 255, 255, 0.7);

  /* Borders */
  --glass-border: rgba(255, 255, 255, 0.35);
  --glass-border-light: rgba(255, 255, 255, 0.2);
  --glass-border-strong: rgba(255, 255, 255, 0.5);

  /* Shadows */
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.08);
  --shadow-nav: 0 10px 40px rgba(0, 0, 0, 0.08);

  /* Radius */
  --radius-lg: 16px;

  /* Blur */
  --blur-sm: blur(8px);
  --blur-md: blur(12px);
  --blur-lg: blur(18px);
  --blur-xl: blur(20px);

  /* Transition */
  --transition: all 0.3s ease;
}

/* =============================
BASE
============================= */
body {
  font-family: "Inter", sans-serif;
  color: var(--text-primary);
}

/* =============================
GLASS SYSTEM
============================= */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border: 1px solid var(--text-primary);
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.glass:hover {
  background: var(--glass-bg-hover);
  box-shadow: var(--shadow-hover);
}

.glass-strong {
  background: var(--glass-strong-bg);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--glass-border-strong);
}

.glass-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: var(--blur-md);
  color: var(--color-white);
}

/* =============================
NAVBAR GLASS
============================= */
.glass-nav {
  background: var(--glass-nav-bg);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border-bottom: 1px solid var(--glass-border-light);
  transition: var(--transition);
}

.glass-nav-scrolled {
  background: var(--glass-nav-scroll-bg) !important;
  backdrop-filter: var(--blur-xl) !important;
  -webkit-backdrop-filter: var(--blur-xl) !important;
  border-bottom: 1px solid var(--glass-border-strong);
  box-shadow: var(--shadow-nav);
}

/* =============================
NAV LINKS
============================= */
.nav-link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--color-blue);
}

.nav-link::after {
  content: "";
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: -4px;
  left: 0;
  background: linear-gradient(to right, var(--color-blue), var(--color-green));
  transition: 0.3s;
}

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

.nav-active {
  color: var(--color-blue);
  font-weight: 600;
}

/* =============================
BUTTON SYSTEM (NEW 🔥)
============================= */
.btn-primary {
  background: linear-gradient(to right, var(--color-blue), var(--color-green));
  color: var(--color-white);
  padding: 10px 20px;
  border-radius: 12px;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

.btn-glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 10px 20px;
  border-radius: 12px;
}

/* =============================
WHATSAPP ANIMATION
============================= */
@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(1, 192, 242, 0.4);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(1, 192, 242, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(1, 192, 242, 0);
  }
}

#whatsappBtn .w-10 {
  animation: pulseGlow 2s infinite;
}