/* css/main.css */
@import url('variables.css');

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background gradient blobs to create a modern premium look */
body::before, body::after {
  content: '';
  position: absolute;
  width: 40vw;
  height: 40vw;
  border-radius: var(--radius-full);
  filter: blur(150px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.12;
}

body::before {
  top: 5%;
  right: -10%;
  background: var(--accent-cyan);
}

body::after {
  bottom: 20%;
  left: -10%;
  background: var(--accent-lime);
}

/* Headings and Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); position: relative; padding-bottom: var(--space-3); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-cyan-hover);
}

ul, ol {
  list-style: none;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.section {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
}

.section-title p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: var(--space-4) auto 0;
  font-size: var(--fs-lg);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  background-color: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header.scrolled {
  background-color: rgba(9, 13, 22, 0.95);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-headings);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--text-primary);
}

.logo span {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo img {
  height: 40px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
  transition: width var(--transition-normal);
}

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

/* Burger Menu button for mobile */
.burger-menu {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--fs-2xl);
  cursor: pointer;
  z-index: 110;
  width: 44px;
  height: 44px;
  position: relative;
  align-items: center;
  justify-content: center;
}

.burger-menu span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  position: absolute;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.burger-menu span:first-child { transform: translateY(-8px); }
.burger-menu span:nth-child(2) { opacity: 1; }
.burger-menu span:last-child { transform: translateY(8px); }

.burger-menu.open span:first-child { transform: rotate(45deg); }
.burger-menu.open span:nth-child(2) { opacity: 0; }
.burger-menu.open span:last-child { transform: rotate(-45deg); }

/* Footer */
.footer {
  background-color: #05080e;
  border-top: 1px solid var(--border-color);
  padding: var(--space-16) 0 var(--space-8);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  margin: var(--space-4) 0 var(--space-6);
  line-height: 1.6;
}

.footer-socials {
  display: flex;
  gap: var(--space-4);
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social-link:hover {
  transform: translateY(-3px);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.footer-heading {
  font-family: var(--font-headings);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover {
  color: var(--text-primary);
  padding-left: var(--space-1);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.footer-contact-item svg {
  color: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  margin: 0;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: var(--text-muted);
}

.footer-bottom-links a:hover {
  color: var(--text-secondary);
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
  color: #090D16;
  padding: var(--space-3) var(--space-6);
  z-index: 999;
  font-weight: 700;
  border-bottom-right-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Focus outline for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 4px;
}