/* =========================================================
   1. DESIGN TOKENS
========================================================= */

:root {
  --btn-idle: #888;
  --btn-hover: #fff;

  --color-primary: #888;
  --color-secondary: #fff;
  --color-tertiary: #ccc;
  --color-error: #ff4d4d;

  --ui-primary: var(--color-primary);
  --ui-secondary: var(--color-secondary);
  --ui-tertiary: var(--color-tertiary);
  --ui-primary-safe: var(--color-primary);

  /* Text sizes */
  --terminal-font: 14px;
  --terminal-header-font: 12px;
  --status-font: 11px;

  /* Button sizes */
  --btn-font: 14px;
  --enter-font: 14px;

  /* Button layout */
  --ui-btn-padding: 10px 18px;
  --enter-padding: 16px 32px;
  --ui-btn-letter-spacing: 2px;
  --enter-letter-spacing: 3px;
  --ui-btn-min-width: 160px;

  /* Intro title */
  --intro-title-font: 18px;
}

.theme-guard-black {
  --ui-primary-safe: #d0d0d0;
}

/* =========================================================
   2. GLOBAL BASE
========================================================= */

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #050505;
  font-family: "IBM Plex Mono", "Noto Sans JP", monospace;
  -webkit-font-smoothing: antialiased;
}

canvas {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

/* Hide buttons until fonts loaded */

body:not(.fonts-loaded) .fullscreen-page-btn,
body:not(.fonts-loaded) #enterBtn,
body:not(.fonts-loaded) .back-button {
  visibility: hidden;
}

:fullscreen .site-footer {
  display: none;
}

/* =========================================================
   3. SHARED UI BUTTON BASE
========================================================= */

.ui-button,
.fullscreen-page-btn,
.back-button {

  padding: var(--ui-btn-padding);
  font-size: var(--btn-font);
  letter-spacing: var(--ui-btn-letter-spacing);
  min-width: var(--ui-btn-min-width);
  text-align: center;

  border: 1px solid var(--btn-idle);
  background: rgba(0, 0, 0, 0.75);
  color: var(--btn-idle);

  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: 0.25s ease;
}

/* ENTER button */

#enterBtn {

  padding: var(--enter-padding);
  font-size: var(--enter-font);
  letter-spacing: var(--enter-letter-spacing);
  min-width: var(--ui-btn-min-width);
  text-align: center;

  border: 1px solid var(--btn-idle);
  background: rgba(0, 0, 0, 0.75);
  color: var(--btn-idle);

  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: 0.25s ease;
  max-width: 90vw;
}

#backBtn {
  display: none;
}

#fullscreenPageBtn {
  display: none;
}

/* =========================================================
   4. PULSE ANIMATIONS
========================================================= */

@keyframes pulsePrimary {

  0%   { box-shadow: 0 0 0 transparent; }
  50%  { box-shadow: 0 0 18px var(--color-primary); }
  100% { box-shadow: 0 0 0 transparent; }

}

@keyframes pulseSecondary {

  0%   { box-shadow: 0 0 0 transparent; }
  50%  { box-shadow: 0 0 22px var(--color-secondary); }
  100% { box-shadow: 0 0 0 transparent; }

}

/* =========================================================
   5. BUTTON BEHAVIOR
========================================================= */

#enterBtn {
  animation: pulsePrimary 2.4s ease-in-out infinite;
}

#enterBtn:hover {
  animation: pulseSecondary 1.6s ease-in-out infinite;
  background: rgba(15, 15, 15, 0.9);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.back-button:hover,
.fullscreen-page-btn:hover,
.audio-control-btn:hover {

 animation: pulseSecondary 1.6s ease-in-out infinite;
 background: rgba(15, 15, 15, 0.9);
 border-color: var(--color-secondary);
 color: var(--color-secondary);

}

/* =========================================================
   6. POSITIONED UI ELEMENTS
========================================================= */

.status {

  position: fixed;
  top: 18px;
  left: 28px;

  font-size: var(--status-font);
  letter-spacing: 3px;
  color: rgba(200, 200, 200, 0.45);

  z-index: 9;
}

.fullscreen-page-btn {

  position: fixed;

  top: 20px;
  right: 20px;

  z-index: 999;
}

.audio-control-btn {

 padding: 10px 14px;
 min-width: 44px;

 border: 1px solid var(--btn-idle);
 background: rgba(0,0,0,0.75);
 color: var(--btn-idle);

 font-family: inherit;
 font-size: var(--btn-font);
 line-height: 1;
 text-align: center;

 backdrop-filter: blur(6px);
 cursor: pointer;
 transition: 0.25s ease;

}

.audio-control-group{

 position: fixed;
 bottom: 72px;
 left: 20px;

 display: none;
 flex-direction: row;

 gap: 6px;

 z-index: 999;

}

.audio-control-group{

 position: fixed;

 bottom: 20px;
 left: 20px;

 display: none;
 gap: 6px;

 z-index: 999;

}

.audio-control-btn{

 padding: 10px 14px;
 min-width: 44px;

 border: 1px solid var(--btn-idle);
 background: rgba(0,0,0,0.75);
 color: var(--btn-idle);

 font-family: inherit;
 font-size: var(--btn-font);
 line-height: 1;
 text-align: center;

 backdrop-filter: blur(6px);
 cursor: pointer;
 transition: 0.25s ease;

}

.back-button {

  position: fixed;
  bottom: 20px;
  right: 20px;

  z-index: 12;
}

body.is-fullscreen .fullscreen-page-btn {
  display: none;
}

body.is-fullscreen .audio-control-group {
 bottom: 20px;
}

/* =========================================================
   7. INTRO SCREEN
========================================================= */

.intro-screen {

  position: fixed;
  inset: 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  z-index: 11;

  visibility: hidden;
}

.intro-screen.ready {
  visibility: visible;
}

.intro-title {

  font-size: var(--intro-title-font);
  letter-spacing: 2px;
  margin-bottom: 24px;

  color: var(--ui-tertiary);
  text-transform: uppercase;
}

.intro-title::before {

  content: "> ";
  color: var(--color-secondary);

}

.event-banner {

  position: fixed;
  top: 0;
  left: 0;

  width: 100%;
  padding: 8px 10px;

  text-align: center;
  font-size: 13px;
  letter-spacing: 0.4px;

  background: rgba(140, 0, 0, 0.92);
  color: #fff;

  z-index: 9999;
  user-select: none;
}

.intro-tagline {

  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;

  color: var(--ui-secondary);
  opacity: 0.9;

  margin-top: 6px;
  margin-bottom: 22px;
}

.intro-action {
  margin-top: 20px;
}

.hidden {
  display: none;
}

/* =========================================================
   8. MENU SCREEN
========================================================= */

.menu-screen {

  position: fixed;
  inset: 0;

  display: none;
  align-items: center;
  justify-content: center;

  z-index: 11;
  background: rgba(0,0,0,0.92);
}

.menu-terminal {

  width: min(92vw, 720px);

  background: rgba(15,20,15,0.78);
  border: 1px solid rgba(255,255,255,0.08);

  padding: 28px;
  color: #e6e6e6;

  box-shadow: 0 0 30px rgba(0,0,0,0.45);
}

.menu-title {

  font-size: 18px;
  letter-spacing: 2px;
  margin-bottom: 20px;

  color: var(--ui-tertiary, #d0d0d0);
}

.menu-title::before {

  content: "> ";
  color: var(--color-secondary, #4da6ff);
}

.menu-line {
  margin-bottom: 8px;
  white-space: pre-wrap;
}

.menu-actions {

  margin-top: 24px;
  display: grid;
  gap: 10px;
}

.menu-btn {

  padding: 12px 16px;
  font: inherit;
  text-align: left;

  border: 1px solid var(--btn-idle, #888);
  background: rgba(0,0,0,0.75);
  color: var(--btn-idle, #ddd);

  cursor: pointer;
}

.menu-btn:hover {

  border-color: var(--color-secondary, #4da6ff);
  color: var(--color-secondary, #4da6ff);
  background: rgba(15,15,15,0.9);

}

#menuAudioConsole{
 position:absolute;
 bottom:4px;
 left:50%;
 transform:translateX(-50%);

 font-family:monospace;
 font-size:12px;

 color:#00ff88;      
 opacity:0.8;

 display:flex;
 align-items:center;
 gap:10px;
}

#menuAudioConsole button{
 background:none;
 border:1px solid #00ff88;
 color:#00ff88;
 font-family:monospace;
 font-size:11px;
 padding:2px 6px;
 cursor:pointer;
 opacity:0.8;
}

#menuAudioConsole button:hover{
 background:#00ff88;
 color:#000;
}

#terminalClock {

 position:absolute;
 right:12px;
 bottom:6px;

 font-family: monospace;
 font-size: 12px;

 color: #00ff88;
 opacity: 0.8;

 pointer-events: none;
}

/* =========================================================
   9. TERMINAL LAYOUT
========================================================= */

.terminal {

  position: fixed;
  inset: 0;
  margin: auto;

  width: min(92vw, 880px);
  min-width: 320px;

  height: min(60dvh, 700px);
  max-height: 90vh;

  background: rgba(14,18,14,0.48);
  border: 1px solid rgba(255,255,255,0.06);

  backdrop-filter: blur(10px);

  display: flex;
  flex-direction: column;

  box-shadow: 0 40px 120px rgba(0,0,0,0.85);

  z-index: 10;

  opacity: 0;
  transition: opacity 0.4s ease;
}

.terminal.open {
  opacity: 1;
}

.terminal-header {

  height: 36px;

  display: flex;
  align-items: center;

  padding: 0 12px;

  font-size: var(--terminal-header-font);
  color: rgba(220,220,220,0.75);

  border-bottom: 1px solid rgba(0,0,0,0.6);
}

.terminal-title {

  flex: 1;
  text-align: center;

  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.terminal-body {

  flex: 1;
  min-height: 0;

  overflow-y: auto;
      scroll-behavior: auto;


  font-size: var(--terminal-font);
  line-height: 1.55;

  color: #e8e8e8;
}

.terminal-output {
  padding: 12px 18px 40px 18px;
}

.term-line {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.4;
}

.terminal::after{

 content:"";

 position:absolute;

 left:0;
 right:0;
 bottom:0;

 height:30px;

 background:transparent;
 border:none;
 backdrop-filter:none;

 pointer-events:none;

}

/* Terminal colors */

.userhost { color: #00ff00; }
.colon    { color: #ffffff; }
.path     { color: #4da6ff; }
.symbol   { color: #ffffff; }
.output   { color: #dddddd; }
.error    { color: var(--color-error); }

.cursor {

  display: inline-block;
  width: 8px;
  height: 1em;

  background: #e8e8e8;

  margin-left: 2px;
  transform: translateY(0.15em);
}

#calcKeys button {

  font-size: 22px;
  padding: 16px;

  background: #111;
  border: 1px solid #333;

  color: #0f0;

  cursor: pointer;
}

#terminalOutput {

  max-height: calc(100vh - 140px);
  overflow: auto;
        overflow-x: auto;
    overflow-y: auto;
}

pre {
    white-space: pre-wrap;
}

#calcKeys button {
  font-size: 22px;
  padding: 14px;
}

@media (max-width:600px) {

pre {
    font-size:12px;
}

}

/* =========================================================
   10. HEADER
========================================================= */

.site-header {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: #050505;
}

.header-inner {

  max-width: 900px;
  margin: auto;

  padding: 16px 24px;

  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {

  font-size: 14px;
  letter-spacing: 1px;

  color: #e6e6e6;
}

.header-nav {
  font-size: 13px;
}

.header-nav a {

  color: #4da6ff;
  text-decoration: none;
}

.header-nav a:hover {
  text-decoration: underline;
}

.header-separator {
  margin: 0 6px;
  opacity: 0.5;
}

/* =========================================================
   11. FOOTER
========================================================= */

.site-footer {

  position: fixed;
  bottom: 12px;

  width: 100%;

  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;

  color: rgba(255,255,255,0.35);

  pointer-events: none;
  z-index: 30;
}

.footer-inner {
  letter-spacing: 0.08em;
}

.footer-separator {
  margin: 0 8px;
  opacity: 0.4;
}

.site-footer a {
  pointer-events: auto;
}

.about-node403 {

  position: absolute;
  left: -9999px;

  width: 1px;
  height: 1px;

  overflow: hidden;
}