/* base.css */

/* CSS RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Responsive font scaling */
  font-size: clamp(13px, 2vw, 16px);
}

html, body {
  width: 100%;
  height: 100%;
}

body.no-scroll {
  overflow: hidden;
}


/* Root Variables */
:root {
  /* Backgrounds */
  --bg-light: #F5F7FA;
  --bg-dark: #0F172A;
  --bg-white: #FFFFFF;
  --card-bg-light: #F9FAFB;

  /* Text colors */
  --text-light: #0F172A;
  --text-dark: #E5E7EB;

  --text-primary: var(--text-light);
  --text-color: var(--text-light);

  --text-muted: rgba(15, 23, 42, 0.65);

  /* Brand colors */
  --primary: #2da0a8;
  --secondary: #2980B9;
  --neutral: #1E293B;
  --sec-hover: #3498DB;
  --accent: #96CEB4;
  --accent-2: #2DA0A8;

  /* Effects */
  --glass: rgba(255, 255, 255, 0.75);
  --blur: blur(14px);
  --radius: 16px;
  --shadow: 0 8px 24px rgba(0,0,0,0.5);
  --transition: all 0.4s ease;
  
  /* Gradients */
  --title-underline: linear-gradient(90deg,#2f7a75, #03cef6 );

  /*  */
  --nav-height: 70px;
  --nav-blur: blur(14px);

}

/* Body */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background: var(--bg-light);
  color: var(--text-light);
  transition: var(--transition);
  overflow-x: hidden; 
  -webkit-font-smoothing: antialiased; 
  -moz-osx-font-smoothing: grayscale;
}

/* Dark theme overrides (Navy Blue) */
body.dark {
  --bg-light: #0A172A;
  --text-light: #E5E7EB;
  --card-bg-light: #1E293B;
  --text-primary: #E5E7EB;
  --text-color: #E5E7EB;
  --text-muted: #9CA3AF;
  --nav-active: #3498DB;
  --shadow: 0 10px 30px rgba(0,0,0,0.4);
  --glass: rgba(15, 23, 42, 0.75);
} 

 /* ================= SECTIONS ================= */
section {
  min-height: auto;
  padding: 4rem 5%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  margin-top: var(--nav-height);
}

section:first-of-type {
  margin-top: 0;
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 2rem);
}

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

/* ================= HEADERS ================= */
.header {
  text-align: center;
}

.header h2 {
  font-size: 2.5rem;
  font-weight:700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));

  background-clip: text;          /* Standard */
  -webkit-background-clip: text;  /* Chrome, Safari */

  -webkit-text-fill-color: transparent;

  position: relative;
  display: inline-block;
  width: 100%;
}

.header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: var(--title-underline);
  
  transform: translateX(-50%);
  animation: expandLine 0.8s ease-out forwards;
}

@keyframes expandLine {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 80px;
    opacity: 1;
  }
}

.header p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  font-weight: 400;
  margin-bottom: 3.5rem;
  margin: 0 auto 3rem;
}

/* ================= SCROLLBAR STYLING ================= */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--bg-light);
}

/* ================= REVEAL ANIMATIONS ================= */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Delay helpers */
.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.6s; }
.delay-5 { transition-delay: 0.75s; }
.delay-6 { transition-delay: 0.9s; }
.delay-7 { transition-delay: 1.05s; }
.delay-8 { transition-delay: 1.2s; }
.delay-9 { transition-delay: 1.35s; }
.delay-10 { transition-delay: 1.5s; }

/*================= ACCESSIBILITY ================= */
/* Responsive design and media queries are in responsive.css */

/* ✅ Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--secondary);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 4px 0;
}

.skip-to-main:focus {
  top: 0;
}

/* ✅ Focus visible for all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}