/* PiDP-11 Web Portal - DEC Corporate Style */

:root {
  --digital-blue: #0085CA;
  --dark-blue: #003366;
  --white: #FFFFFF;
  --light-grey: #F0F0F0;
  --medium-grey: #666666;
  --dark-grey: #333333;
  --red-accent: #CC0000;
  --green-accent: #339933;
  --border-light: #CCCCCC;
  --border-mid: #BBBBBB;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--white);
  color: var(--medium-grey);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--digital-blue);
  text-decoration: none;
}

a:hover {
  color: var(--dark-blue);
  text-decoration: underline;
}

/* Header */
header {
  background: var(--dark-blue);
  border-bottom: 3px solid var(--digital-blue);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  color: var(--white);
  font-size: 1.5rem;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.header-logo {
  height: 1.8rem;
  filter: brightness(0) invert(1);
}

.dec-logo {
  display: inline-flex;
  gap: 0;
  font-family: 'Courier New', Courier, monospace;
  font-weight: bold;
  font-size: 1.1rem;
  letter-spacing: 0;
}

.dec-logo span {
  display: inline-block;
  width: 1.4em;
  height: 1.6em;
  line-height: 1.6em;
  text-align: center;
  border: 2px solid var(--digital-blue);
  color: var(--white);
  background: transparent;
  margin-right: -2px;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--white);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  text-decoration: none;
}

nav a:hover,
nav a.active {
  color: #66BBEE;
  border-bottom-color: #66BBEE;
  text-decoration: none;
}

/* Main content */
main {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 3rem 0;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 2rem;
}

.hero h2 {
  color: var(--dark-blue);
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.hero .subtitle {
  color: var(--medium-grey);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.hero .status {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid var(--green-accent);
  color: var(--green-accent);
  font-size: 0.85rem;
  letter-spacing: 1px;
  background: #f0fff0;
}

.hero .status::before {
  content: '\25CF ';
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Info grid */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.info-card {
  background: var(--light-grey);
  border: 1px solid var(--border-light);
  padding: 1.5rem;
}

.info-card h3 {
  color: var(--digital-blue);
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.info-card p,
.info-card ul {
  color: var(--medium-grey);
  font-size: 0.85rem;
  line-height: 1.6;
}

.info-card ul {
  list-style: none;
  padding: 0;
}

.info-card ul li::before {
  content: '- ';
  color: var(--digital-blue);
}

/* Game list */
.game-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}

.game-card {
  background: var(--light-grey);
  border: 1px solid var(--border-light);
  padding: 1.2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s;
  cursor: pointer;
}

.game-card:hover {
  border-color: var(--digital-blue);
  box-shadow: 0 2px 8px rgba(0, 133, 202, 0.15);
}

.game-card .game-info h3 {
  color: var(--dark-grey);
  font-size: 1rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.game-card .game-info p {
  color: var(--medium-grey);
  font-size: 0.8rem;
}

.game-card .game-type {
  color: var(--digital-blue);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 1px solid var(--digital-blue);
  padding: 0.2rem 0.6rem;
  white-space: nowrap;
  background: #EAF5FC;
}

/* Terminal container */
.terminal-section {
  margin: 2rem 0;
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--dark-blue);
  border: 1px solid var(--dark-blue);
  border-bottom: none;
  padding: 0.6rem 1rem;
}

.terminal-header span {
  color: var(--white);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: 'Courier New', Courier, monospace;
}

.terminal-header .controls {
  display: flex;
  gap: 0.5rem;
}

.terminal-header .controls button {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-family: 'Courier New', monospace;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  transition: all 0.2s;
}

.terminal-header .controls button:hover {
  background: var(--digital-blue);
  border-color: var(--digital-blue);
  color: var(--white);
}

#terminal-container {
  background: #000000;
  border: 1px solid var(--border-mid);
  height: 500px;
  position: relative;
}

#terminal-container .connect-prompt {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #ffb000;
  font-family: 'Courier New', Courier, monospace;
}

#terminal-container .connect-prompt p {
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

#terminal-container .connect-prompt button {
  background: transparent;
  border: 1px solid #ffb000;
  color: #ffb000;
  font-family: 'Courier New', monospace;
  font-size: 1rem;
  padding: 0.5rem 2rem;
  cursor: pointer;
  transition: all 0.2s;
}

#terminal-container .connect-prompt button:hover {
  background: #ffb000;
  color: #000000;
}

/* Section headings */
.section-heading {
  color: var(--digital-blue);
  font-size: 1.1rem;
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--digital-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
}

/* About page */
.about-content {
  line-height: 1.8;
  font-size: 0.9rem;
}

.about-content p {
  margin-bottom: 1rem;
  color: var(--medium-grey);
}

.about-content .spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.about-content .spec-table td {
  padding: 0.4rem 1rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--dark-grey);
}

.about-content .spec-table td:first-child {
  color: var(--digital-blue);
  white-space: nowrap;
  width: 200px;
  font-weight: 600;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.link-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--medium-grey);
}

.link-list li::before {
  content: '';
}

.link-list li::after {
  content: '';
}

/* Footer */
footer {
  background: var(--dark-blue);
  border-top: 3px solid var(--digital-blue);
  padding: 1rem 2rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.75rem;
  letter-spacing: 1px;
}

/* System cards grid (index page) */
.system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.system-card {
  background: var(--light-grey);
  border: 1px solid var(--border-light);
  padding: 1.5rem;
  display: block;
  text-decoration: none;
  transition: all 0.2s;
}

.system-card:hover {
  border-color: var(--digital-blue);
  box-shadow: 0 2px 12px rgba(0, 133, 202, 0.15);
  color: inherit;
  text-decoration: none;
}

.system-card-label {
  color: var(--dark-blue);
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.system-card-name {
  color: var(--medium-grey);
  font-size: 0.8rem;
  letter-spacing: 1px;
  margin-bottom: 0.8rem;
}

.system-card-desc {
  color: var(--dark-grey);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.system-card-os {
  color: var(--green-accent);
  font-size: 0.75rem;
  letter-spacing: 1px;
  border: 1px solid var(--green-accent);
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: #f0fff0;
}

/* System photo (individual system pages) */
.system-photo-row {
  margin: 1.5rem 0;
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
}

.system-photo {
  border: 1px solid var(--border-light);
  max-width: 280px;
  width: 100%;
  display: block;
}

.system-photo img {
  width: 100%;
  height: auto;
  display: block;
}

.card-img {
  max-height: 200px;
  overflow: hidden;
}

.card-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.system-photo-caption {
  color: var(--medium-grey);
  font-size: 0.78rem;
  line-height: 1.6;
  padding-top: 0.3rem;
}

/* Network diagram */
.network-diagram {
  background: var(--light-grey);
  border: 1px solid var(--border-light);
  padding: 1.5rem 2rem;
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.net-node {
  background: var(--white);
  border: 1px solid var(--digital-blue);
  color: var(--dark-blue);
  font-size: 0.85rem;
  padding: 0.5rem 1.5rem;
  text-align: center;
  letter-spacing: 1px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.net-node span {
  color: var(--medium-grey);
  font-size: 0.75rem;
  display: block;
  margin-top: 0.2rem;
}

.net-node-router {
  border-color: var(--green-accent);
  color: var(--green-accent);
}

.net-node-wide {
  width: 100%;
  max-width: 380px;
  border-color: var(--border-mid);
  color: var(--medium-grey);
}

.net-arrow {
  color: var(--medium-grey);
  font-size: 0.8rem;
  padding: 0.3rem 0;
  text-align: center;
}

.photo-caption {
  color: var(--medium-grey);
  font-size: 0.75rem;
  text-align: center;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Node table (HECnet page) */
.node-table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.node-table th {
  color: var(--white);
  background: var(--dark-blue);
  text-align: left;
  padding: 0.5rem 1rem;
  border-bottom: 2px solid var(--digital-blue);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.78rem;
}

.node-table td {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--dark-grey);
}

.node-table tr:hover td {
  background: var(--light-grey);
}

/* Responsive */
@media (max-width: 700px) {
  header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

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

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

  .system-photo-row {
    flex-direction: column;
  }

  .system-photo {
    max-width: 100%;
  }

  main {
    padding: 1rem;
  }

  #terminal-container {
    height: 400px;
  }

  .game-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}