/* ========================================
   GPS Workshop Lab Manual - Styles
   ISU MSS26
   ======================================== */

/* CSS Variables */
:root {
  --primary: #0066cc;
  --primary-dark: #004d99;
  --primary-light: #e6f2ff;
  --secondary: #00c853;
  --accent: #ff6b35;
  --dark: #1a1a2e;
  --dark-light: #16213e;
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--dark);
}

h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

code,
pre {
  font-family: "JetBrains Mono", monospace;
}

/* Navigation */
.navbar {
  background: var(--dark);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0.75rem 0;
}

.nav-container {
  max-width: 1400px; /* Increased max-width to give more room for the menu */
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  font-weight: 600;
  font-size: 1rem; /* Slightly smaller logo text */
  flex-shrink: 0; /* Don't crush the logo */
}

.logo-icon {
  font-size: 1.25rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.25rem; /* Minimum gap */
  flex-wrap: nowrap; /* Force one line */
  align-items: center;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.8);
  padding: 0.5rem 0.6rem; /* Very tight horizontal padding */
  border-radius: var(--radius-sm);
  font-size: 0.8rem; /* Slightly smaller font */
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  color: #fff;
  padding: 8rem 1.5rem 4rem;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.hero h1 {
  color: #fff;
  font-size: 3.5rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff 0%, #a0c4ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1rem;
}

.hero-description {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary) 0%, #0088ff 100%);
  color: #fff;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(0, 102, 204, 0.4);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.5);
  color: #fff;
}

/* Satellite Animation */
.hero-visual {
  width: 300px;
  height: 300px;
  position: relative;
}

.satellite-animation {
  width: 100%;
  height: 100%;
  position: relative;
}

.earth {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  overflow: hidden;
  box-shadow:
    0 0 30px rgba(74, 144, 217, 0.4),
    0 0 60px rgba(74, 144, 217, 0.2);
  z-index: 10;
}

.earth-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Orbiting Satellites */
.orbit-path {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.orbit-path-1 {
  animation: orbit 12s linear infinite;
}

.orbit-path-2 {
  animation: orbit 15s linear infinite reverse;
}

.orbit-path-3 {
  animation: orbit 10s linear infinite;
  animation-delay: -3s;
}

.orbit-path-4 {
  animation: orbit 18s linear infinite reverse;
  animation-delay: -5s;
}

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

.sat-wrapper {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.orbit-path-1 .sat-wrapper {
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
}

.orbit-path-2 .sat-wrapper {
  top: 50%;
  right: 5px;
  transform: translateY(-50%);
  flex-direction: row;
}

.orbit-path-3 .sat-wrapper {
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  flex-direction: column-reverse;
}

.orbit-path-4 .sat-wrapper {
  top: 50%;
  left: 5px;
  transform: translateY(-50%);
  flex-direction: row-reverse;
}

.satellite {
  font-size: 1.8rem;
  animation:
    counter-rotate 12s linear infinite,
    sat-pulse 2s ease-in-out infinite;
  filter: drop-shadow(0 0 8px rgba(100, 180, 255, 0.6));
}

.orbit-path-2 .satellite {
  animation:
    counter-rotate-reverse 15s linear infinite,
    sat-pulse 2s ease-in-out infinite;
}

.orbit-path-3 .satellite {
  animation:
    counter-rotate 10s linear infinite,
    sat-pulse 2s ease-in-out infinite;
  animation-delay: -3s, 0s;
}

.orbit-path-4 .satellite {
  animation:
    counter-rotate-reverse 18s linear infinite,
    sat-pulse 2s ease-in-out infinite;
  animation-delay: -5s, 0s;
}

/* Counter-rotate to keep satellites upright */
@keyframes counter-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(-360deg);
  }
}

@keyframes counter-rotate-reverse {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes sat-pulse {
  0%,
  100% {
    filter: drop-shadow(0 0 8px rgba(100, 180, 255, 0.6));
  }
  50% {
    filter: drop-shadow(0 0 15px rgba(100, 180, 255, 0.9));
  }
}

/* Instructor link styling */
.instructor-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.4);
  transition: all 0.3s ease;
}

.instructor-link:hover {
  color: #fff;
  text-decoration-color: #fff;
}

.footer .instructor-link {
  color: rgba(255, 255, 255, 0.8);
}

.footer .instructor-link:hover {
  color: #fff;
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 700px;
}

/* Table of Contents Grid */
.toc-section {
  margin-bottom: 4rem;
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.toc-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  color: var(--text);
}

.toc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  color: var(--text);
}

.toc-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.toc-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.toc-content p {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 0;
}

.toc-arrow {
  margin-left: auto;
  font-size: 1.25rem;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-10px);
  transition: var(--transition);
}

.toc-card:hover .toc-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Objectives Section */
.objectives-section {
  margin-bottom: 4rem;
}

.objectives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.objective-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.objective-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-light);
  position: absolute;
  top: -0.5rem;
  right: 1rem;
  line-height: 1;
}

.objective-card h4 {
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.objective-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* GIS&T Body of Knowledge Links */
.bok-intro {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.bok-intro a {
  color: var(--primary);
  font-weight: 500;
}

.bok-link {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-light), #d4e8ff);
  color: var(--primary-dark);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  margin-right: 0.25rem;
  transition: var(--transition);
}

.bok-link:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-1px);
}

/* Source attribution for figures */
.figure-attribution {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  margin-top: 0.5rem;
}

.figure-attribution a {
  color: var(--primary);
}

/* Schedule Section */
.schedule-section {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.schedule-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.schedule-tab {
  padding: 0.75rem 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
}

.schedule-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.schedule-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.schedule-content.hidden {
  display: none;
}

.schedule-day {
  background: var(--bg);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
}

.schedule-day h4 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.schedule-time {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.schedule-location {
  font-size: 0.875rem;
  color: var(--text-light);
}

/* Footer */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 3rem 1.5rem;
  text-align: center;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #fff;
}

.footer p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.footer-instructor {
  color: rgba(255, 255, 255, 0.6);
}

.footer-love {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Content Pages */
.page-header {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  color: #fff;
  padding: 7rem 1.5rem 3rem;
  text-align: center;
}

.page-header h1 {
  color: #fff;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.1rem;
}

.content-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.content-section {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 2rem;
}

.content-section h2 {
  border-bottom: 2px solid var(--primary);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.content-section h3 {
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.content-section ul,
.content-section ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.content-section li {
  margin-bottom: 0.5rem;
}

/* Tables */
.content-section table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.content-section th,
.content-section td {
  padding: 0.75rem 1rem;
  text-align: left;
  border: 1px solid var(--border);
}

.content-section th {
  background: var(--bg);
  font-weight: 600;
}

.content-section tr:nth-child(even) {
  background: var(--bg);
}

/* Code blocks */
.code-block {
  background: var(--dark);
  color: #e2e8f0;
  padding: 1.5rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.code-block code {
  font-family: "JetBrains Mono", monospace;
}

/* Info boxes */
.info-box {
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
}

.info-box.tip {
  background: #e8f5e9;
  border-left: 4px solid var(--secondary);
}

.info-box.warning {
  background: #fff3e0;
  border-left: 4px solid var(--accent);
}

.info-box.note {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
}

/* Navigation buttons */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
}

.nav-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.nav-btn.next {
  margin-left: auto;
}

/* Wiring diagram */
.wiring-diagram {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 2rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre;
}

/* Responsive */
@media (max-width: 1024px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--dark);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0,0,0,0.3);
    z-index: 1000;
  }

  .nav-menu.active {
    right: 0;
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 6rem;
    gap: 2rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-meta {
    justify-content: center;
  }

  .hero-visual {
    width: 200px;
    height: 200px;
  }

  .toc-grid {
    grid-template-columns: 1fr;
  }

  .objectives-grid {
    grid-template-columns: 1fr;
  }

  .schedule-content {
    grid-template-columns: 1fr;
  }

  .nav-buttons {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }

  .nav-btn {
    width: auto;
    min-width: 220px;
    justify-content: center;
  }

  .nav-btn.next {
    margin-left: 0;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.2rem;
  }
  
  .page-header h1 {
    font-size: 2rem;
  }
  
  .content-container {
    padding: 1.5rem;
  }
  
  .trilateration-grid {
    grid-template-columns: 1fr;
  }

  /* Responsive Tables */
  .content-section table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .content-section table thead {
    display: none;
  }

  .content-section table tbody {
    display: block;
  }

  .content-section table tr {
    display: block;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    padding: 0.5rem;
  }

  .content-section table td {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: none;
    border-bottom: 1px solid var(--border);
    text-align: right;
  }

  .content-section table td:last-child {
    border-bottom: none;
  }

  .content-section table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--dark);
    text-align: left;
    flex-shrink: 0;
  }
}