/* --- GLOBAL VARIABLES --- */
:root {
  --bg: #020617;
  --sidebar-bg: #0f172a;
  --card-bg: #1e293b;
  --accent: #3b82f6;
  --text-main: #f8fafc;
  --text-dim: #94a3b8;
  --border: #334155;
  --success: #10b981;
  --danger: #ef4444;
  --terminal-bg: #000000;
  --sidebar-width: 300px;
  --header-height: 60px;
}

* {
  box-sizing: border-box;
}

body {
  font-family:
    "Inter",
    -apple-system,
    sans-serif;
  background: var(--bg);
  color: var(--text-main);
  margin: 0;
  display: flex;
  flex-direction: column; /* Stack Top Header and Main Content */
  height: 100vh;
  overflow: hidden;
}

/* --- PERMANENT TOP HEADER --- */
.user-header {
  height: var(--header-height);
  background: #020617;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 1100; /* Above Sidebar */
}

.header-left {
  display: flex;
  align-items: center;
  gap: 15px;
}

#displayUserName {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--text-main);
}

/* --- BURGER BUTTON & SIDEBAR --- */
.sidebar-toggle {
  background: var(--accent);
  color: white;
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s;
}

.sidebar-toggle:hover {
  filter: brightness(1.2);
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  z-index: 1000;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.sidebar.closed {
  transform: translateX(-100%);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* --- MAIN DASHBOARD AREA --- */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* --- CENTERED TOP NAVIGATION --- */
.top-nav {
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: center; /* Centering Tabs */
  z-index: 10;
}

.nav-container {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  gap: 5px;
}

.nav-container::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.nav-tab {
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 16px 20px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s;
}

.nav-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: rgba(59, 130, 246, 0.05);
}

/* --- CONTENT CONTAINERS --- */
.scroll-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto; /* Centering the grid horizontally */
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- CARDS / SECTIONS --- */
.section {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
  font-size: 0.75rem;
  margin: 0 0 15px 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 800;
}

label {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 5px;
  display: block;
  font-weight: 700;
}

input,
select {
  width: 100%;
  background: #020617;
  border: 1px solid var(--border);
  color: #fff;
  padding: 10px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 10px;
}

input:focus {
  border-color: var(--accent);
  outline: none;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

.total-display {
  background: #020617;
  padding: 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  margin: 15px 0;
  text-align: center;
  border: 1px dashed var(--border);
  color: var(--success);
}

/* --- BUTTONS --- */
button {
  font-family: inherit;
  font-weight: 800;
  font-size: 11px;
  padding: 12px;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  text-transform: uppercase;
  transition: all 0.2s;
}

.btn-p {
  background: var(--accent);
  color: white;
  width: 100%;
}
.btn-s {
  background: var(--success);
  color: white;
  width: 100%;
}
.btn-d {
  background: var(--danger);
  color: white;
  width: 100%;
}
.btn-dim {
  background: #334155;
  color: white;
  width: 100%;
}
.btn-d-sm {
  background: var(--danger);
  color: white;
  padding: 6px 12px;
  font-size: 10px;
}

button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* --- TERMINAL & LOGS --- */
.terminal-header {
  background: #0f172a;
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border);
}

#terminal {
  height: 180px;
  background: var(--terminal-bg);
  color: #34d399;
  font-family: "Fira Code", monospace;
  font-size: 12px;
  padding: 15px 24px;
  overflow-y: auto;
  border-top: 1px solid var(--border);
}

/* --- STATUS INDICATOR --- */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: #020617;
  border-radius: 8px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
}

#dot {
  height: 10px;
  width: 10px;
  border-radius: 50%;
  background: var(--danger);
}
.online #dot {
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 768px) {
  .sidebar {
    width: 85%; /* Take up most of screen on mobile */
  }

  .grid-container {
    grid-template-columns: 1fr; /* Single column on small screens */
  }

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

  .nav-tab {
    padding: 14px 12px;
    font-size: 10px;
  }

  .scroll-container {
    padding: 15px 10px; /* Reduced padding for mobile */
  }
}

.calc-row-header {
  display: grid;
  grid-template-columns: 1fr 1.5fr 0.3fr 1.5fr 0.3fr 1.5fr; /* Matches the row below */
  gap: 5px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}

.calc-row-header span {
  font-size: 9px;
  color: var(--text-dim);
  font-weight: 800;
  text-align: center;
}

.calc-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 0.3fr 1.5fr 0.3fr 1.5fr;
  gap: 5px;
  align-items: center;
  margin-bottom: 10px;
}

.calc-row label {
  margin-bottom: 0;
  color: var(--text-main);
  font-size: 11px;
  font-weight: 700;
}

.symbol {
  color: var(--text-dim);
  font-weight: 800;
  font-size: 14px;
  text-align: center;
}

.calc-row input {
  margin-bottom: 0 !important;
  text-align: center;
  padding: 8px 4px;
  min-width: 0; /* Prevents overflow in grid */
}

.res-box {
  background: #000;
  border: 1px solid var(--success);
  color: var(--success);
  font-weight: 800;
  font-size: 12px;
  text-align: center;
  padding: 8px 4px;
  border-radius: 6px;
  min-height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
}