/* ===== CLIPPER / DOS RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0000AA;
  --fg: #FFFFFF;
  --cyan: #00FFFF;
  --yellow: #FFFF00;
  --gray: #C0C0C0;
  --black: #000000;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: "Courier New", "IBM 3270", "VT323", monospace;
  min-height: 100vh;
  padding: 10px;
  line-height: 1.5;
}

.system-window {
  max-width: 1200px;
  margin: 0 auto;
  border: 2px solid var(--gray);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 90vh;
}

.titlebar {
  background: var(--gray);
  color: var(--black);
  font-weight: bold;
  padding: 6px 12px;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--gray);
  flex-shrink: 0;
}

.main-layout {
  display: flex;
  flex: 1;
  min-height: 400px;
}

.sidebar {
  width: 220px;
  border-right: 2px solid var(--gray);
  flex-shrink: 0;
  padding: 4px 0;
}

.menu-item {
  display: block;
  width: 100%;
  background: none;
  border: none;
  color: var(--fg);
  text-align: left;
  padding: 10px 16px;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 0.5px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: none;
}

.menu-item:hover,
.menu-item.active {
  background: var(--gray);
  color: var(--black);
}

.content {
  flex: 1;
  padding: 20px 24px;
  overflow-y: auto;
  background: var(--bg);
}

.screen {
  display: none;
}
.screen.active {
  display: block;
}

.box {
  border: 1px solid var(--gray);
  margin-bottom: 20px;
}
.box-title {
  background: var(--gray);
  color: var(--black);
  font-weight: bold;
  padding: 5px 10px;
  letter-spacing: 0.5px;
}
.box-content {
  padding: 14px 16px;
  line-height: 1.8;
  color: var(--fg);
}

.label {
  color: var(--cyan);
  font-weight: 400;
}
.link {
  color: var(--yellow);
  text-decoration: none;
}
.link:hover {
  text-decoration: underline;
}
hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.15);
  margin: 16px 0;
}

.shack-submenu {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
}
.shack-submenu li {
  padding: 5px 0;
  cursor: pointer;
  color: var(--cyan);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.shack-submenu li:hover {
  background: rgba(255,255,255,0.08);
  color: var(--fg);
}
.shack-submenu li.active-item {
  background: var(--gray);
  color: var(--black);
  padding-left: 8px;
}

.shack-split-three {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 12px;
}

.shack-col {
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.shack-col .label {
  color: var(--cyan);
  font-weight: 500;
  display: inline-block;
  min-width: 90px;
}

.city-item {
  padding: 3px 0;
  border-bottom: 1px dotted rgba(255,255,255,0.06);
}

.shack-item {
  padding: 3px 0;
  border-bottom: 1px dotted rgba(255,255,255,0.06);
}

.weather-item {
  margin-bottom: 4px;
}
.weather-item .label {
  color: var(--cyan);
  font-weight: 500;
  display: inline-block;
  min-width: 90px;
}

.statusbar {
  background: var(--gray);
  color: var(--black);
  padding: 6px 12px;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 16px;
  border-top: 2px solid var(--gray);
  flex-shrink: 0;
  font-size: 14px;
}
.cursor {
  animation: blink 1s step-end infinite;
  display: inline-block;
  background: var(--black);
  color: var(--gray);
  padding: 0 4px;
  margin-left: 2px;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@media (max-width: 768px) {
  .main-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 2px solid var(--gray);
    display: flex;
    flex-wrap: wrap;
    padding: 2px 0;
  }
  .menu-item {
    flex: 1 0 auto;
    width: auto;
    padding: 8px 12px;
    border-bottom: none;
    border-right: 1px solid rgba(255,255,255,0.1);
    font-size: 13px;
    text-align: center;
  }
  .menu-item:last-child {
    border-right: none;
  }
  .content {
    padding: 16px;
  }
  .shack-split-three {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .menu-item {
    font-size: 12px;
    padding: 6px 10px;
  }
  .content {
    padding: 12px;
  }
  .box-content {
    padding: 10px 12px;
  }
  .shack-col .label {
    min-width: 70px;
    font-size: 13px;
  }
  .city-item,
  .shack-item,
  .weather-item {
    font-size: 13px;
  }
}