/*
 * BUM16 - Benn's Ultrasonic Modem Stylesheet
 * MS-DOS / BIOS Text-Mode Hacker Style (White, Gray, and Black)
 */

@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

:root {
  --bg-color: #000000;
  --panel-bg: #000000;
  --panel-border: #ffffff;
  --panel-border-muted: #555555;
  --accent-cyan: #ffffff;
  --accent-emerald: #ffffff;
  --accent-purple: #888888;
  --accent-red: #ffffff;
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --text-disabled: #555555;
  --sidebar-width: 280px;
  --shadow-glow: none;
  --shadow-glow-emerald: none;
  --shadow-glow-purple: none;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Force blocky DOS corners */
}

body {
  font-family: 'Share Tech Mono', 'Courier New', Courier, monospace;
  background-color: var(--bg-color);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  overflow: hidden;
  image-rendering: pixelated;
}

/* Retro scrollbar styling */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}
::-webkit-scrollbar-track {
  background: #000000;
  border: 1px solid var(--panel-border-muted);
}
::-webkit-scrollbar-thumb {
  background: #555555;
  border: 2px solid #000000;
}
::-webkit-scrollbar-thumb:hover {
  background: #aaaaaa;
}

/* Sidebar Navigation (DOS Menu style) */
aside {
  width: var(--sidebar-width);
  background-color: #000000;
  border-right: 2px double var(--panel-border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  z-index: 10;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px double var(--panel-border);
  padding-bottom: 1rem;
}

.brand-logo {
  display: none; /* Hide modern logo circle */
}

.brand-text h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: #ffffff;
  text-align: center;
}

.brand-text span {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 2px;
  display: block;
  text-align: center;
}

nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: bold;
  cursor: pointer;
  border: 1px solid transparent;
  text-transform: uppercase;
}

.nav-item::before {
  content: "[ ]";
  color: var(--panel-border-muted);
}

.nav-item:hover {
  color: #ffffff;
  background: #222222;
  border: 1px dashed var(--panel-border);
}

.nav-item.active {
  color: #000000 !important;
  background: #ffffff !important;
  border: 1px solid #ffffff;
}

.nav-item.active::before {
  content: "[X]";
  color: #000000;
}

.sidebar-footer {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
  border-top: 2px double var(--panel-border-muted);
  padding-top: 1rem;
}

/* Main Content Area */
main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: relative;
}

/* Top Stats Bar */
.top-bar {
  height: 45px;
  background-color: #000000;
  border-bottom: 2px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.system-status {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.stat-label {
  color: var(--text-secondary);
}

.stat-value {
  font-weight: bold;
  color: #ffffff;
}

.indicator {
  width: 12px;
  height: 12px;
  background-color: #000000;
  border: 2px solid var(--text-secondary);
  display: inline-block;
}

.indicator.pulse-green {
  background-color: #ffffff;
  border-color: #ffffff;
  animation: dosBlink 1s infinite steps(1);
}

.indicator.pulse-cyan {
  background-color: #ffffff;
  border-color: #ffffff;
  animation: dosBlink 1s infinite steps(1);
}

.indicator.pulse-purple {
  background-color: #888888;
  border-color: #ffffff;
  animation: dosBlink 0.5s infinite steps(1);
}

/* App Containers */
.content-container {
  flex-grow: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tab-content {
  display: none;
  height: 100%;
}

.tab-content.active {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Grid Layouts */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.card {
  background-color: #000000;
  border: 2px solid var(--panel-border);
  padding: 1.25rem;
}

.card h2 {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #ffffff;
  border-bottom: 2px solid var(--panel-border);
  padding-bottom: 0.4rem;
  text-transform: uppercase;
}

.card h2 svg {
  fill: #ffffff;
  color: #ffffff;
}

/* Inputs and Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: bold;
  color: #ffffff;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

.input-control {
  width: 100%;
  background-color: #000000;
  border: 1px solid var(--panel-border-muted);
  padding: 0.5rem;
  color: #ffffff;
  font-family: inherit;
  font-size: 0.95rem;
}

.input-control:focus {
  outline: none;
  border-color: #ffffff;
  box-shadow: none;
}

textarea.input-control {
  resize: vertical;
  min-height: 100px;
}

/* Checkbox Toggle */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: #ffffff;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input {
  cursor: pointer;
}

/* Custom Segmented Control */
.segmented-control {
  display: flex;
  border: 1px solid var(--panel-border-muted);
}

.segment-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 0.5rem;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: bold;
  cursor: pointer;
}

.segment-btn.active {
  background-color: #ffffff;
  color: #000000;
}

/* DOS Command Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: #000000;
  border: 2px solid var(--panel-border);
  color: #ffffff;
  padding: 0.6rem 1.2rem;
  font-family: inherit;
  font-weight: bold;
  font-size: 0.95rem;
  cursor: pointer;
  text-transform: uppercase;
}

.btn:hover {
  background-color: #ffffff;
  color: #000000;
}

.btn:hover svg {
  fill: #000000 !important;
  color: #000000 !important;
}

.btn-primary {
  background-color: #ffffff;
  color: #000000;
  border: 2px solid var(--panel-border);
}

.btn-primary svg {
  fill: #000000;
}

.btn-primary:hover {
  background-color: #000000;
  color: #ffffff;
}

.btn-primary:hover svg {
  fill: #ffffff !important;
}

.btn:disabled, .btn-primary:disabled {
  opacity: 0.25;
  background-color: #000000 !important;
  color: var(--text-disabled) !important;
  border-color: var(--panel-border-muted) !important;
  cursor: not-allowed;
}

.btn-emerald {
  border: 2px solid #ffffff;
}

.btn-danger {
  border: 2px dashed #ffffff;
  color: #ffffff;
}

.btn-danger:hover {
  background-color: #ffffff;
  color: #000000;
}

/* Drag and Drop Zone */
.upload-zone {
  border: 2px dashed var(--panel-border-muted);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  background-color: #000000;
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: #ffffff;
  border-style: solid;
}

.upload-zone svg {
  width: 36px;
  height: 36px;
  fill: #ffffff;
  margin-bottom: 0.5rem;
}

.upload-zone p {
  font-size: 0.95rem;
  color: #ffffff;
}

.upload-zone span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Image Previews Layout */
.image-previews-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.preview-box {
  background-color: #000000;
  border: 1px solid var(--panel-border-muted);
  padding: 0.5rem;
  text-align: center;
}

.preview-box h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.preview-canvas, .preview-img {
  max-width: 100%;
  max-height: 160px;
  image-rendering: pixelated;
  background-color: #000000;
  border: 1px solid var(--panel-border-muted);
}

/* Terminal Log Console */
.terminal-card {
  grid-column: span 2;
}

.terminal-console {
  background-color: #000000;
  border: 2px solid var(--panel-border);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  color: #ffffff;
  padding: 0.75rem;
  height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.terminal-line {
  line-height: 1.4;
  white-space: pre-wrap;
}

.terminal-line::before {
  content: "> ";
  color: var(--text-secondary);
}

.terminal-line.info { color: var(--text-secondary); }
.terminal-line.success { color: #ffffff; font-weight: bold; }
.terminal-line.warn { color: #ffffff; text-decoration: underline; }
.terminal-line.error { color: #ffffff; background: #555555; }

/* Spectrogram and Waveform displays */
.visualizer-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.viz-canvas {
  width: 100%;
  height: 140px;
  background-color: #000000;
  border: 2px solid var(--panel-border);
}

/* Live Player UI controls */
.player-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #000000;
  padding: 0.75rem;
  border: 2px solid var(--panel-border);
  margin-top: 1rem;
}

.player-info {
  display: flex;
  flex-direction: column;
}

.player-title {
  font-size: 0.9rem;
  font-weight: bold;
}

.player-duration {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Range sliders (Blocky DOS style) */
.range-slider-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.range-slider-group input[type="range"] {
  flex-grow: 1;
  accent-color: #ffffff;
  background: #333333;
}

.range-slider-group span {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.95rem;
  min-width: 40px;
  text-align: right;
}

/* Decode Output Area */
.decode-output-box {
  background-color: #000000;
  border: 2px dashed var(--panel-border-muted);
  padding: 1.5rem;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.decode-placeholder {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.decode-placeholder svg {
  width: 40px;
  height: 40px;
  fill: #555555;
}

.decode-result-text {
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
  width: 100%;
  text-align: left;
  white-space: pre-wrap;
  display: none;
  border: 1px solid var(--panel-border-muted);
  padding: 0.75rem;
  background-color: #111111;
}

.decode-result-image {
  max-width: 100%;
  max-height: 240px;
  display: none;
  image-rendering: pixelated;
  border: 2px solid var(--panel-border);
  background-color: #000000;
}

/* Decrypt Overlay Prompt */
.decrypt-prompt {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  max-width: 280px;
  width: 100%;
  border: 2px solid #ffffff;
  padding: 1rem;
  background: #000000;
}

/* Loopback Self Test */
.selftest-status {
  padding: 1rem;
  background-color: #000000;
  border: 1px solid var(--panel-border-muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  margin-top: 1rem;
  min-height: 80px;
  line-height: 1.5;
}

/* Animations */
@keyframes dosBlink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

/* Responsive details */
@media (max-width: 900px) {
  body {
    flex-direction: column;
    overflow: auto;
    height: auto;
  }
  aside {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 2px solid var(--panel-border);
    padding: 1rem;
  }
  .brand {
    margin-bottom: 1rem;
  }
  nav {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  .nav-item {
    padding: 0.5rem 0.75rem;
    white-space: nowrap;
  }
  main {
    height: auto;
  }
  .top-bar {
    height: auto;
    padding: 1rem;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  .content-container {
    padding: 1rem;
    overflow: visible;
  }
  .grid-2col {
    grid-template-columns: 1fr;
  }
  .terminal-card {
    grid-column: span 1;
  }
}

/* Modal Overlay & DOS Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal-content {
  background-color: #000000;
  border: 3px double #ffffff;
  width: 90%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
}

.modal-header {
  background-color: #ffffff;
  color: #000000;
  padding: 0.6rem 1rem;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Share Tech Mono', monospace;
}

.modal-body {
  padding: 1.5rem;
  max-height: 420px;
  overflow-y: auto;
  font-family: 'Share Tech Mono', monospace;
  line-height: 1.5;
  color: #ffffff;
}

/* Floating DOS Muxing Monitor box */
.stego-mux-monitor {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 240px;
  background-color: #000000;
  border: 2px solid #ffffff;
  padding: 8px;
  z-index: 3000;
  box-shadow: 4px 4px 0px #555555;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: 'Share Tech Mono', monospace;
}

.stego-mux-title {
  background: #ffffff;
  color: #000000;
  padding: 2px 4px;
  font-weight: bold;
  font-size: 0.8rem;
  text-align: center;
}

.stego-mux-video {
  width: 100%;
  height: 130px;
  border: 1px solid #555555;
  background: #000;
}