/* ===== ROOT VARIABLES ===== */
:root {
  --resistance-green: #00ff41;
  --resistance-green-dark: #0c3;
  --resistance-green-darker: #009926;
  --resistance-green-light: #0f8;
  --resistance-black: #1a1a1a;
  --resistance-dark-gray: #2d2d2d;
  --resistance-med-gray: #444;
  --resistance-light-gray: #ccc;
  --resistance-white: #fff;
  --resistance-gold: #f0c040;
  --shadow-green: rgb(0 255 65 / 30%);
  --shadow-green-strong: rgb(0 255 65 / 60%);
  --bg-green-subtle: rgb(0 255 65 / 5%);
  --bg-green-light: rgb(0 255 65 / 10%);
  --header-height: 80px;
  --nav-width: 250px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--resistance-black) 0%, #0d0d0d 100%);
  color: var(--resistance-white);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--resistance-green-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  margin-left: 30px;
  margin-bottom: 20px;
}

li {
  margin-bottom: 8px;
  color: var(--resistance-light-gray);
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: linear-gradient(
    135deg,
    var(--resistance-dark-gray) 0%,
    var(--resistance-black) 100%
  );
  border-bottom: 3px solid var(--resistance-green);
  display: flex;
  align-items: center;
  padding: 0 30px;
  z-index: 1000;
  box-shadow: 0 4px 20px var(--shadow-green);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 15px;
  text-decoration: none;
}

.logo-circle {
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--resistance-green) 0%,
    var(--resistance-green-dark) 100%
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  color: var(--resistance-black);
  border: 3px solid var(--resistance-green);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.team-name {
  font-size: 20px;
  font-weight: bold;
  color: var(--resistance-green);
  letter-spacing: 2px;
}

.team-tagline {
  font-size: 11px;
  color: var(--resistance-light-gray);
  font-style: italic;
}

.header-nav {
  margin-left: auto;
  display: flex;
  gap: 25px;
}

.header-nav a,
.nav-section a {
  color: var(--resistance-light-gray);
  text-decoration: none;
  transition: all 0.3s ease;
}

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 5px;
}

.nav-section a {
  display: block;
  padding: 10px 15px;
  border-radius: 5px;
  font-size: 14px;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--resistance-green);
  background: var(--bg-green-subtle);
}

.nav-section a:hover,
.nav-section a.active {
  background: var(--bg-green-light);
  color: var(--resistance-green);
  transform: translateX(5px);
  font-weight: 600;
}

/* ===== MOBILE MENU TOGGLE ===== */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--resistance-green);
  color: var(--resistance-green);
  padding: 8px 15px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 18px;
  margin-left: auto;
}

/* ===== SIDEBAR NAVIGATION ===== */
.sidebar-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--nav-width);
  height: calc(100vh - var(--header-height));
  background: var(--resistance-dark-gray);
  border-right: 2px solid var(--resistance-med-gray);
  padding: 30px 20px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 30px;
}

.nav-section-title {
  font-size: 12px;
  font-weight: bold;
  color: var(--resistance-green);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--resistance-med-gray);
}

.nav-section ul {
  list-style: none;
}

.nav-section li {
  margin-bottom: 8px;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-left: var(--nav-width);
  margin-top: var(--header-height);
  padding: 40px;
  min-height: calc(100vh - var(--header-height));
}

.content-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

/* ===== TYPOGRAPHY ===== */
h1 {
  font-size: 32px;
  color: var(--resistance-green);
  margin-bottom: 20px;
  font-weight: bold;
}

h2 {
  font-size: 24px;
  color: var(--resistance-green);
  margin-top: 30px;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--resistance-green);
}

h3 {
  font-size: 18px;
  color: var(--resistance-green-light);
  margin-top: 25px;
  margin-bottom: 12px;
}

h4 {
  font-size: 16px;
  color: var(--resistance-light-gray);
  margin-top: 20px;
  margin-bottom: 10px;
}

p {
  margin-bottom: 15px;
  color: var(--resistance-light-gray);
}

code {
  background: var(--resistance-dark-gray);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: "Courier New", monospace;
  color: var(--resistance-green-light);
  font-size: 0.9em;
}

pre {
  background: var(--resistance-dark-gray);
  border-left: 4px solid var(--resistance-green);
  padding: 20px;
  border-radius: 5px;
  overflow-x: auto;
  margin: 20px 0;
}

pre code {
  background: none;
  padding: 0;
}

/* ===== TABLES ===== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: var(--resistance-dark-gray);
  border-radius: 8px;
  overflow: hidden;
}

thead {
  background: var(--resistance-green);
  color: var(--resistance-black);
}

th {
  padding: 15px;
  text-align: left;
  font-weight: bold;
}

td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--resistance-med-gray);
}

tbody tr:hover {
  background: var(--bg-green-subtle);
}

/* ===== BOXES & CARDS ===== */
.info-box {
  background: var(--resistance-dark-gray);
  border-left: 4px solid var(--resistance-green);
  padding: 20px;
  margin: 20px 0;
  border-radius: 5px;
}

.warning-box {
  background: rgb(240 192 64 / 10%);
  border-left: 4px solid var(--resistance-gold);
  padding: 20px;
  margin: 20px 0;
  border-radius: 5px;
}

.success-box {
  background: var(--bg-green-light);
  border-left: 4px solid var(--resistance-green);
  padding: 20px;
  margin: 20px 0;
  border-radius: 5px;
}

.card {
  background: var(--resistance-dark-gray);
  border: 2px solid var(--resistance-med-gray);
  border-radius: 10px;
  padding: 25px;
  margin: 20px 0;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--resistance-green);
  box-shadow: 0 8px 25px var(--shadow-green);
}

.card-title {
  font-size: 22px;
  color: var(--resistance-green);
  margin-bottom: 15px;
  font-weight: bold;
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 15px;
  font-size: 12px;
  font-weight: bold;
  margin-right: 8px;
}

.badge-beginner {
  background: rgb(76 175 80 / 20%);
  color: #4caf50;
  border: 1px solid #4caf50;
}

.badge-intermediate {
  background: rgb(240 192 64 / 20%);
  color: var(--resistance-gold);
  border: 1px solid var(--resistance-gold);
}

.badge-advanced {
  background: rgb(244 67 54 / 20%);
  color: #f44336;
  border: 1px solid #f44336;
}

.badge-green {
  background: var(--bg-green-light);
  color: var(--resistance-green);
  border: 1px solid var(--resistance-green);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 12px 25px;
  background: linear-gradient(
    135deg,
    var(--resistance-green) 0%,
    var(--resistance-green-dark) 100%
  );
  color: var(--resistance-black);
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--shadow-green-strong);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--resistance-green);
  color: var(--resistance-green);
}

.btn-outline:hover {
  background: var(--bg-green-light);
}

/* ===== FOOTER ===== */
.site-footer {
  margin-left: var(--nav-width);
  background: var(--resistance-black);
  border-top: 2px solid var(--resistance-green);
  padding: 30px;
  text-align: center;
  color: var(--resistance-light-gray);
  font-size: 14px;
}

.footer-highlight {
  color: var(--resistance-green);
  font-weight: bold;
}

.footer-links {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--resistance-green);
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-separator {
  color: var(--resistance-med-gray);
  margin: 0 10px;
}

.footer-tagline {
  font-style: italic;
  color: var(--resistance-green);
  font-size: 13px;
  margin-top: 5px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (width <= 1024px) {
  .main-content {
    margin-left: 0;
    padding: 20px;
  }

  .sidebar-nav {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
  }

  .sidebar-nav.active {
    transform: translateX(0);
  }

  .header-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .site-footer {
    margin-left: 0;
  }
}

@media (width <= 768px) {
  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 16px;
  }

  .site-header {
    padding: 0 15px;
  }

  .team-name {
    font-size: 16px;
  }

  .logo-circle {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
  text-align: center;
}

.text-green {
  color: var(--resistance-green);
}

.mt-1 {
  margin-top: 10px;
}

.mt-2 {
  margin-top: 20px;
}

.mt-3 {
  margin-top: 30px;
}

.mb-1 {
  margin-bottom: 10px;
}

.mb-2 {
  margin-bottom: 20px;
}

.mb-3 {
  margin-bottom: 30px;
}

/* ===== ANIMATIONS ===== */
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fade-in 0.6s ease;
}

@keyframes glow {
  0%,
  100% {
    box-shadow: 0 0 20px var(--shadow-green);
  }

  50% {
    box-shadow: 0 0 40px var(--shadow-green-strong);
  }
}

.glow {
  animation: glow 2s infinite;
}

/* ===== HOME PAGE HERO ===== */
.hero-section {
  text-align: center;
  margin-bottom: 50px;
}

.hero-content {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  margin-bottom: 30px;
}

.hero-logo {
  width: 120px;
  height: 120px;
  font-size: 56px;
}

.hero-title {
  margin: 0;
  font-size: 56px;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--resistance-light-gray);
  text-align: center;
  margin-top: -20px;
  margin-bottom: 5px;
}

.hero-tagline {
  font-size: 18px;
  color: var(--resistance-green);
  text-align: center;
  margin-bottom: 30px;
}

.section-heading {
  margin-bottom: 20px;
}

.challenges-heading {
  margin: 60px 0 20px;
}

/* ===== INFO SECTION GRID ===== */
.info-section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

/* ===== CONTACT PAGE GRID ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

/* ===== HEADING ANCHORS ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  position: relative;
}

.heading-anchor {
  position: absolute;
  left: -1.5em;
  padding-right: 0.5em;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  color: var(--resistance-green);
}

h1:hover .heading-anchor,
h2:hover .heading-anchor,
h3:hover .heading-anchor,
h4:hover .heading-anchor,
h5:hover .heading-anchor,
h6:hover .heading-anchor {
  opacity: 1;
}

.heading-anchor:hover {
  color: var(--resistance-green-light);
  text-decoration: none;
}

.heading-anchor-icon {
  font-weight: normal;
}

/* Mobile adjustment for heading anchors */
@media (width <= 768px) {
  .heading-anchor {
    position: static;
    margin-right: 0.5em;
    opacity: 0.6;
  }
}