/* =========================
   RESET
========================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: #ffffff;
  text-align: center;
  background-color: #070b14;
  overflow-x: hidden;
}

/* =========================
   GLOBAL LINK SYSTEM
========================= */

a {
  color: #00ffff;
  text-decoration: none;
  transition: 0.3s ease;
}

a:visited {
  color: #00ffff;
}

a:hover {
  color: #ffffff;
}

a:active {
  color: #00ffff;
}

/* =========================
   BACKGROUND SYSTEM
========================= */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;

  background:
    repeating-radial-gradient(
      circle at center,
      rgba(0,255,255,0.12) 0px,
      rgba(0,255,255,0.12) 1px,
      transparent 1px,
      transparent 120px
    ),
    repeating-conic-gradient(
      from 0deg,
      rgba(0,255,255,0.08) 0deg,
      rgba(0,255,255,0.08) 1deg,
      transparent 1deg,
      transparent 30deg
    );

  animation: rotateSystem 60s linear infinite;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background: radial-gradient(circle at center, rgba(0,200,255,0.15), transparent 70%);
}

html::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  background: url("ai-blog-960x536.jpg") center/cover no-repeat;
  opacity: 0.15;
  filter: blur(2px);
}

@keyframes rotateSystem {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* =========================
   CONTAINER
========================= */

.container {
  max-width: 720px;
  margin: auto;
  padding: 0 20px;
}

/* =========================
   NAVIGATION
========================= */

nav {
  padding: 25px 0;
}

nav a {
  margin: 0 18px;
  font-size: 14px;
  color: #cccccc;
}

nav a:hover {
  color: #00ffff;
}

/* =========================
   TYPOGRAPHY SYSTEM
========================= */

h1 {
  font-size: 52px;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #00ffff, #00ff99);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 24px;
  margin-top: 48px;
  margin-bottom: 20px;
  color: #00ffff;
  font-weight: 400;
  letter-spacing: 1px;
}

p {
  font-size: 16px;
  color: #cccccc;
  margin: 18px 0;
}

/* =========================
   LIST SYSTEM
========================= */

.highlight-list {
  list-style: none;
  padding: 0;
  margin: 30px 0;
}

.highlight-list li {
  margin: 20px 0;
  font-size: 20px;
  font-weight: 500;
  color: #ffffff;
  letter-spacing: 0.3px;
}

.highlight-list li a {
  color: inherit;
}

/* =========================
   DIVIDER
========================= */

.divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 40px 0;
}

/* =========================
   SECTION
========================= */

.section {
  margin: 120px auto 0 auto;
  padding: 40px 32px;
  background: transparent;
}

/* =========================
   BUTTON
========================= */

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 28px;
  border: 1px solid #00ffff;
  color: #00ffff;
  border-radius: 30px;
  font-size: 14px;
  transition: 0.3s ease;
}

.btn:hover {
  background: #00ffff;
  color: #000000;
  box-shadow: 0 0 20px rgba(0,255,255,0.6);
}

/* =========================
   FOOTER
========================= */

footer {
  margin-top: 100px;
  padding: 40px 0;
  font-size: 14px;
  color: #666666;
}