/* ============================================================
   EYES ONLY - CRT Terminal Stylesheet
   Visual direction: Westwood Studios C&C (1995-98), Red Alert
   briefing screens, Cold War command terminals, CRT phosphor
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primary phosphor colors - amber CRT */
  --phosphor:        #33ff33;
  --phosphor-dim:    #1a9c1a;
  --phosphor-bright: #66ff66;
  --phosphor-glow:   rgba(51, 255, 51, 0.15);

  /* Amber mode (alternate, activated by hidden command) */
  --amber:           #ffb000;
  --amber-dim:       #996a00;
  --amber-bright:    #ffc640;
  --amber-glow:      rgba(255, 176, 0, 0.15);

  /* Background - deep CRT black with slight warmth */
  --bg:              #0a0a0a;
  --bg-screen:       #050805;

  /* Timing */
  --cursor-blink:    1s;
  --scanline-speed:  8s;

  /* CRT geometry */
  --barrel-amount:   3px;
  --scanline-opacity: 0.12;
  --glow-spread:     4px;
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- Base --- */
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: 'Courier New', 'Lucida Console', 'Consolas', monospace;
  font-size: 16px;
  line-height: 1.4;
  color: var(--phosphor);
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: unset;
}

/* --- CRT Screen Container --- */
#crt-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-screen);
  overflow: hidden;
}

/* --- Barrel Distortion (CSS approximation) --- */
#crt-screen::before {
  content: '';
  position: absolute;
  top: -2%;
  left: -2%;
  width: 104%;
  height: 104%;
  border-radius: 50% / 10%;
  box-shadow:
    inset 0 0 80px 40px rgba(0, 0, 0, 0.9),
    inset 0 0 20px 10px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  z-index: 100;
}

/* --- Scanlines Overlay --- */
#scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 90;
  overflow: hidden;
}

/* Horizontal scanlines */
#scanlines::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 1px,
    rgba(0, 0, 0, var(--scanline-opacity)) 1px,
    rgba(0, 0, 0, var(--scanline-opacity)) 2px
  );
  animation: scanline-flicker 0.05s infinite;
}

/* Rolling scanline bar */
#scanlines::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 40%;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(51, 255, 51, 0.02) 40%,
    rgba(51, 255, 51, 0.04) 50%,
    rgba(51, 255, 51, 0.02) 60%,
    transparent 100%
  );
  animation: scanline-roll var(--scanline-speed) linear infinite;
}

/* --- Phosphor Glow Layer --- */
#phosphor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 80;
  background: radial-gradient(
    ellipse at center,
    var(--phosphor-glow) 0%,
    transparent 70%
  );
  opacity: 0.3;
}

/* --- Vignette --- */
#vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 95;
  box-shadow: inset 0 0 150px 60px rgba(0, 0, 0, 0.7);
}

/* --- Terminal Output Area --- */
#terminal {
  position: relative;
  z-index: 10;
  width: 100%;
  height: 100%;
  padding: 5vh 5vw;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;

  /* Phosphor text glow */
  text-shadow:
    0 0 var(--glow-spread) var(--phosphor-glow),
    0 0 calc(var(--glow-spread) * 2) var(--phosphor-glow);
}

#terminal::-webkit-scrollbar {
  display: none;
}

/* --- Terminal Lines --- */
.line {
  white-space: pre-wrap;
  word-wrap: break-word;
  min-height: 1.4em;
  opacity: 0;
  animation: line-appear 0.05s forwards;
}

.line.instant {
  opacity: 1;
  animation: none;
}

/* --- Title Display --- */
.title-text {
  font-size: 1.5em;
  letter-spacing: 0.15em;
  font-weight: bold;
  text-shadow:
    0 0 8px var(--phosphor-glow),
    0 0 16px var(--phosphor-glow),
    0 0 32px var(--phosphor-glow);
}

/* --- Blinking Cursor --- */
.cursor {
  display: inline-block;
  width: 0.6em;
  animation: cursor-blink var(--cursor-blink) step-end infinite;
}

.cursor::after {
  content: '_';
}

/* --- Input Line --- */
#input-line {
  display: flex;
  align-items: baseline;
  min-height: 1.4em;
}

#input-prompt {
  white-space: pre;
  color: var(--phosphor);
}

#input-buffer {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--phosphor);
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  caret-color: transparent;
  text-shadow: inherit;
  -webkit-font-smoothing: none;
}

#input-cursor {
  display: inline-block;
  animation: cursor-blink var(--cursor-blink) step-end infinite;
}

#input-cursor::after {
  content: '_';
}

/* --- Hidden Mobile Input --- */
#mobile-input {
  position: fixed;
  left: -9999px;
  top: 50%;
  width: 1px;
  height: 1px;
  opacity: 0;
  font-size: 16px; /* prevents iOS zoom on focus */
  border: none;
  outline: none;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

/* --- System Messages --- */
.system-msg {
  color: var(--phosphor-dim);
}

.system-msg.highlight {
  color: var(--phosphor-bright);
  text-shadow:
    0 0 8px var(--phosphor-glow),
    0 0 16px var(--phosphor-glow);
}

.system-msg.error {
  color: #ff3333;
  text-shadow: 0 0 8px rgba(255, 50, 50, 0.3);
}

.system-msg.classified {
  color: var(--phosphor-bright);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* --- Header / Inverse Text --- */
.inverse {
  background: var(--phosphor);
  color: var(--bg);
  display: inline;
  padding: 0 0.3em;
  text-shadow: none;
}

/* --- Boot Sequence Specific --- */
.boot-line {
  color: var(--phosphor-dim);
  font-size: 0.85em;
}

.progress-bar {
  color: var(--phosphor-dim);
}

.progress-bar .filled {
  color: var(--phosphor);
}

/* --- Classification Banner --- */
.classification-banner {
  text-align: center;
  padding: 0.5em 0;
  letter-spacing: 0.3em;
  font-weight: bold;
  color: var(--phosphor-bright);
  text-shadow:
    0 0 10px var(--phosphor-glow),
    0 0 20px var(--phosphor-glow);
  border-top: 1px solid var(--phosphor-dim);
  border-bottom: 1px solid var(--phosphor-dim);
  margin: 0.5em 0;
}

/* --- Mission Briefing --- */
.briefing-header {
  border-bottom: 1px solid var(--phosphor-dim);
  padding-bottom: 0.3em;
  margin-bottom: 0.5em;
  letter-spacing: 0.2em;
}

.briefing-body {
  padding-left: 2em;
  color: var(--phosphor);
}

.briefing-codename {
  color: var(--phosphor-bright);
  font-weight: bold;
  letter-spacing: 0.15em;
}

/* --- Amber Mode (toggled via hidden command) --- */
body.amber-mode {
  --phosphor:        var(--amber);
  --phosphor-dim:    var(--amber-dim);
  --phosphor-bright: var(--amber-bright);
  --phosphor-glow:   var(--amber-glow);
}

body.amber-mode #scanlines::after {
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(255, 176, 0, 0.02) 40%,
    rgba(255, 176, 0, 0.04) 50%,
    rgba(255, 176, 0, 0.02) 60%,
    transparent 100%
  );
}

/* --- Screen Flicker Effect (triggered on state transitions) --- */
.screen-flicker {
  animation: flicker-burst 0.3s ease-out;
}

/* --- Animations --- */
@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes scanline-roll {
  0%   { top: -40%; }
  100% { top: 100%; }
}

@keyframes scanline-flicker {
  0%   { opacity: 1; }
  50%  { opacity: 0.97; }
  100% { opacity: 1; }
}

@keyframes line-appear {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes flicker-burst {
  0%   { opacity: 1; }
  10%  { opacity: 0.6; }
  20%  { opacity: 1; }
  30%  { opacity: 0.8; }
  50%  { opacity: 1; }
  70%  { opacity: 0.9; }
  100% { opacity: 1; }
}

/* --- Glitch Effect (used during ACCESS GRANTED) --- */
@keyframes glitch {
  0%   { transform: translate(0); }
  20%  { transform: translate(-2px, 1px); }
  40%  { transform: translate(2px, -1px); }
  60%  { transform: translate(-1px, 2px); }
  80%  { transform: translate(1px, -2px); }
  100% { transform: translate(0); }
}

.glitch-text {
  animation: glitch 0.1s ease-in-out 3;
}

/* --- Responsive --- */
@media (max-width: 600px) {
  html, body {
    font-size: 13px;
  }
  #terminal {
    padding: 3vh 3vw;
  }
  .title-text {
    font-size: 1.2em;
  }
}

@media (max-width: 400px) {
  html, body {
    font-size: 11px;
  }
}

/* --- Print (disable for classified documents) --- */
@media print {
  body::before {
    content: 'CLASSIFIED - UNAUTHORIZED REPRODUCTION PROHIBITED';
    display: block;
    text-align: center;
    font-size: 2em;
    padding: 2em;
  }
  #terminal, #scanlines, #phosphor-glow, #vignette {
    display: none !important;
  }
}