/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --green:       #00ff41;
  --green-dim:   #00c032;
  --green-dark:  #006618;
  --green-faint: #002208;
  --warn:        #ffb000;
  --bg:          #010801;
  --surface:     #020d02;
  --border:      #1a4d1a;
  --font: 'Share Tech Mono', 'Courier New', monospace;
  --glow: 0 0 6px #00ff41, 0 0 12px rgba(0,255,65,0.4);
  --glow-sm: 0 0 4px rgba(0,255,65,0.6);
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--green);
  font-family: var(--font);
  font-size: 14px;
  overflow: hidden;
}

.hidden { display: none !important; }

/* ── Matrix rain canvas ──────────────────────────────────────────────────── */
#rain {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

/* ── CRT scanlines + flicker ─────────────────────────────────────────────── */
.crt-overlay {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  pointer-events: none;
  z-index: 100;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.13) 3px,
    rgba(0,0,0,0.13) 4px
  );
  animation: flicker 8s infinite;
}

@keyframes flicker {
  0%,100%              { opacity: 1; }
  92%, 94%             { opacity: 0.92; }
  92.5%                { opacity: 0.6; }
  93%                  { opacity: 0.95; }
}

/* ── Name-prompt overlay ─────────────────────────────────────────────────── */
.name-overlay {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  background: rgba(1,8,1,0.88);
}

.name-box {
  width: min(640px, 92vw);
  padding: 2rem 2.4rem;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 0 32px rgba(0,255,65,0.15), inset 0 0 24px rgba(0,0,0,0.5);
}

.boot-line {
  line-height: 1.9;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--green);
  text-shadow: var(--glow-sm);
}

.boot-line.dim   { color: var(--green-dark); text-shadow: none; }
.boot-line.warn  { color: var(--warn); text-shadow: 0 0 6px rgba(255,176,0,0.5); }

.blink-line::after {
  content: ' ■';
  animation: blink 1s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.prompt-row {
  display: flex;
  align-items: center;
  margin-top: 0.4rem;
}

.prompt-label {
  white-space: nowrap;
  font-size: 0.82rem;
  color: var(--green);
  text-shadow: var(--glow-sm);
}

.name-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--green);
  font-family: var(--font);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  caret-color: var(--green);
  text-shadow: var(--glow-sm);
}

.name-input::placeholder { color: var(--green-dark); }

/* ── Main terminal ───────────────────────────────────────────────────────── */
.terminal {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  display: flex;
  flex-direction: column;
  z-index: 10;
}

/* Header */
.term-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.header-left  { text-shadow: var(--glow-sm); }
.header-right { color: var(--green-dim); }

.header-center {
  color: var(--green);
  text-shadow: var(--glow);
}

.blink-slow {
  animation: blink 2s step-end infinite;
}

/* Messages pane */
.messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.8rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  scroll-behavior: smooth;
}

.messages::-webkit-scrollbar { width: 6px; }
.messages::-webkit-scrollbar-track { background: var(--bg); }
.messages::-webkit-scrollbar-thumb { background: var(--border); }

/* Individual message rows */
.msg-row {
  font-size: 0.8rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--green-dim);
  word-break: break-word;
}

.msg-row .ts {
  color: var(--green-dark);
  font-size: 0.72rem;
  margin-right: 0.5rem;
}

.msg-row .uname {
  color: var(--green);
  text-shadow: var(--glow-sm);
  margin-right: 0.2rem;
}

.msg-row .arrow { color: var(--green-dark); margin-right: 0.3rem; }

.msg-row.system {
  color: var(--warn);
  font-style: italic;
  font-size: 0.72rem;
  text-align: center;
  opacity: 0.7;
}

/* Input row */
.input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.prompt-sym {
  color: var(--green);
  text-shadow: var(--glow-sm);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.msg-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--green);
  font-family: var(--font);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  caret-color: var(--green);
  text-shadow: var(--glow-sm);
}

.msg-input::placeholder { color: var(--green-dark); }

.send-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--green-dim);
  font-family: var(--font);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.1s, color 0.1s, box-shadow 0.1s;
  touch-action: manipulation;
  flex-shrink: 0;
}

.send-btn:hover, .send-btn:active {
  border-color: var(--green);
  color: var(--green);
  box-shadow: var(--glow-sm);
}

/* ── Connection status bar ───────────────────────────────────────────────── */
#status-bar {
  text-align: center;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 2px 0;
  flex-shrink: 0;
  transition: opacity 0.4s;
}

#status-bar.ok      { color: var(--green-dark); }
#status-bar.error   { color: var(--warn); }

/* ── Mobile tweaks ───────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .term-header { font-size: 0.6rem; padding: 0.35rem 0.6rem; }
  .header-center { display: none; }
  .messages { padding: 0.6rem; }
  .input-row { padding: 0.5rem 0.6rem; gap: 0.3rem; }
  .send-btn { padding: 0.3rem 0.5rem; font-size: 0.62rem; }
}