/* =============================================================
   Day 14 — Retro Terminal Portfolio
   style.css
   ============================================================= */

/* ── 1. Custom Properties ─────────────────────────────────── */
:root {
  --clr-bg:       #000000;
  --clr-text:     #00ff41;
  --clr-dim:      #006620;
  --clr-glow:     #00ff41;
  --clr-error:    #ff3333;
  --clr-warn:     #ffb000;
  --clr-header:   #001a00;
  --clr-border:   #003300;

  --font-mono: 'VT323', 'Courier New', monospace;

  --fs-base:   20px;
  --fs-header: 14px;
  --fs-corner: 13px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── 2. Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  line-height: 1.5;
  overflow: hidden;
  /* Subtle green tint on the body background for ambient phosphor bleed */
  background-image: radial-gradient(ellipse at 50% 60%, #001a00 0%, #000000 70%);
}

/* ── 3. CRT Screen Wrapper ───────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  border-radius: 6px;
}

/* ── 4. App Shell ─────────────────────────────────────────── */
.app {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

/* ── 5. Corner Label ──────────────────────────────────────── */
.corner-label {
  position: fixed;
  top: 16px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-corner);
  color: var(--clr-dim);
  letter-spacing: 0.1em;
  z-index: 200;
  pointer-events: none;
}

/* ── 6. Terminal Container ────────────────────────────────── */
.terminal {
  width: 100%;
  max-width: 900px;
  height: calc(100vh - 40px);
  max-height: 680px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

/* ── 7. Terminal Header (Window Chrome) ───────────────────── */
.terminal-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--clr-header);
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
  font-size: var(--fs-header);
  font-family: var(--font-mono);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  opacity: 0.7;
}

.dot--red    { background: #ff5f57; }
.dot--yellow { background: #febc2e; }
.dot--green  { background: #28c840; }

.terminal-title {
  flex: 1;
  text-align: center;
  color: var(--clr-dim);
  font-size: var(--fs-header);
  letter-spacing: 0.08em;
}

.mute-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--clr-dim);
  font-family: var(--font-mono);
  font-size: 16px;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.15s;
}
.mute-btn:hover { color: var(--clr-text); }

/* ── 8. Output Area ───────────────────────────────────────── */
.output {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px 8px;
  display: flex;
  flex-direction: column;
  gap: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-border) transparent;
  scroll-behavior: smooth;
}

.output::-webkit-scrollbar       { width: 6px; }
.output::-webkit-scrollbar-track { background: transparent; }
.output::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 3px; }

/* Output line types */
.line {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  min-height: 1.6em;
}
.line--dim     { color: var(--clr-dim); }
.line--error   { color: var(--clr-error); }
.line--warn    { color: var(--clr-warn); }
.line--cmd     { color: var(--clr-text); opacity: 0.6; }
.line--blank   { min-height: 0.8em; }
.line--ascii   {
  white-space: pre;
  line-height: 1.2;
  font-size: 0.85em;
  color: var(--clr-text);
}
.line--heading {
  letter-spacing: 0.1em;
  margin-top: 4px;
}

/* ── 9. Input Row ─────────────────────────────────────────── */
.input-line {
  display: flex;
  align-items: center;
  padding: 8px 20px 14px;
  flex-shrink: 0;
  border-top: 1px solid var(--clr-border);
  gap: 0;
}

.prompt {
  color: var(--clr-text);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  flex-shrink: 0;
  user-select: none;
}

.cmd-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--clr-text);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  caret-color: transparent; /* we use our own cursor */
  padding: 0;
  line-height: 1.5;
}

.cmd-input::placeholder { color: transparent; }
.cmd-input:disabled { opacity: 0.4; cursor: not-allowed; }

/* Blinking block cursor */
.cursor-block {
  display: inline-block;
  width: 10px;
  height: 1.1em;
  background: var(--clr-text);
  vertical-align: middle;
  margin-left: 1px;
  animation: blink 1.1s step-end infinite;
}

.cmd-input:disabled ~ .cursor-block {
  opacity: 0.3;
  animation: none;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ── 10. CRT Effects ─────────────────────────────────────── */

/* Scanlines overlay */
.screen::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
  pointer-events: none;
  border-radius: inherit;
  z-index: 1;
}

/* Vignette overlay */
.screen::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    rgba(0, 0, 0, 0.55) 100%
  );
  pointer-events: none;
  border-radius: inherit;
  z-index: 2;
}

/* Phosphor glow on the whole terminal */
.terminal {
  box-shadow:
    0 0 0 1px var(--clr-border),
    0 0 20px rgba(0, 255, 65, 0.08),
    inset 0 0 40px rgba(0, 0, 0, 0.5);
  animation: flicker 8s step-end infinite;
}

/* Subtle CRT phosphor screen flicker */
@keyframes flicker {
  0%   { opacity: 1; }
  2%   { opacity: 0.97; }
  4%   { opacity: 1; }
  60%  { opacity: 1; }
  62%  { opacity: 0.98; }
  63%  { opacity: 1; }
  80%  { opacity: 1; }
  81%  { opacity: 0.97; }
  82%  { opacity: 1; }
}

/* Glow on individual text lines — keep blur tight so pixel font stays crisp */
.line,
.prompt,
.cmd-input {
  text-shadow: 0 0 2px var(--clr-glow);
}

/* Slightly warmer glow on header */
.terminal-header {
  text-shadow: 0 0 4px rgba(0, 255, 65, 0.3);
}

/* Reduced motion: disable flicker and glow animation */
@media (prefers-reduced-motion: reduce) {
  .terminal { animation: none; }
  .cursor-block { animation: none; }
}

/* ── 11. Responsive ──────────────────────────────────────── */

@media (max-width: 768px) {
  :root {
    --fs-base:   clamp(16px, 3.5vw, 20px);
    --fs-header: 12px;
  }

  .app {
    padding: 10px;
    align-items: flex-start;
  }

  .terminal {
    height: calc(100dvh - 20px);
    max-height: none;
    border-radius: 4px;
  }

  .output {
    padding: 12px 14px 6px;
  }

  .input-line {
    padding: 6px 14px 10px;
  }

  /* Tap anywhere on terminal to focus input (mobile keyboards) */
  .terminal {
    cursor: text;
  }
}

@media (max-width: 480px) {
  :root {
    --fs-base:   clamp(14px, 4vw, 18px);
  }

  .terminal-header {
    padding: 6px 10px;
  }

  .terminal-title {
    font-size: 11px;
  }

  .line--ascii {
    font-size: clamp(7px, 1.8vw, 11px);
    letter-spacing: -0.02em;
  }

  .corner-label {
    font-size: 11px;
  }
}