/* =========================================================
   HIDDEN PROFESSOR — TERMINAL THEME
   ========================================================= */

:root {
  --background: #020502;
  --terminal: #050b05;
  --terminal-border: #123012;
  --green: #39ff14;
  --green-dim: #1d8f12;
  --green-dark: #0b3d0b;
  --text: #b6ff9f;
  --error: #ff4444;
  --warning: #d7ff4f;

  --font-mono: "JetBrains Mono", "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: var(--background);
  color: var(--text);
  font-family: var(--font-mono);
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow-x: hidden;
}

/* ---------- Landing page ---------- */

[hidden] { display: none !important; }

.landing {
  width: min(100%, 1040px);
  min-height: min(680px, 88vh);
  padding: 22px clamp(26px, 5vw, 68px) 26px;
  border: 1px solid #273127;
  background: #0a0d0a;
  box-shadow: 0 18px 60px rgba(0, 0, 0, .58);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.landing__masthead,
.landing__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #687267;
  font-size: 10px;
  letter-spacing: .12em;
  line-height: 1.5;
  text-transform: uppercase;
}

.landing__masthead { padding-bottom: 17px; border-bottom: 1px solid #263027; }
.landing__main { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(220px, .7fr); gap: clamp(36px, 10vw, 150px); align-items: center; flex: 1; padding: 46px 0; }
.landing__copy { max-width: 610px; }

.landing__eyebrow,
.landing__artifact figcaption {
  color: #829180;
  font-size: 11px;
  letter-spacing: .16em;
  line-height: 1.5;
}

.landing__eyebrow { margin: 0 0 22px; }

.landing h1 {
  max-width: 13ch;
  margin: 0 0 30px;
  color: #c7d0c5;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(38px, 6vw, 74px);
  font-weight: 400;
  letter-spacing: -.045em;
  line-height: .96;
}

.landing h1 em { color: var(--green); font-style: normal; }

.landing__intro {
  max-width: 48ch;
  margin: 0 0 34px;
  color: #9da99b;
  font-size: 14px;
  line-height: 1.8;
}

.landing__launch,
.terminal-header__button {
  border: 1px solid #526151;
  background: transparent;
  color: #bdc9bb;
  font: 12px var(--font-mono);
  letter-spacing: .08em;
  cursor: pointer;
}

.landing__launch {
  display: inline-flex;
  gap: 24px;
  min-width: 222px;
  padding: 11px 13px;
}

.landing__launch:hover,
.landing__launch:focus-visible,
.terminal-header__button:hover,
.terminal-header__button:focus-visible {
  border-color: var(--green);
  color: var(--green);
  box-shadow: none;
}

.landing__artifact { width: 100%; max-width: 260px; margin: 0; justify-self: end; }

.landing__artifact-frame { position: relative; padding: 10px 10px 25px; border: 1px solid #394638; background: #111611; transform: rotate(1.5deg); }

.landing__artifact img {
  display: block;
  width: 100%;
  max-height: 330px;
  object-fit: contain;
  margin: 0 auto;
  border: 1px solid #202a20;
  background: #000;
  filter: grayscale(1) contrast(1.12) brightness(.68);
}

.landing__artifact-mark { position: absolute; right: 15px; bottom: 5px; color: #84937f; font: 15px Georgia, serif; }
.landing__artifact figcaption { margin: 15px 0 0; color: #687267; font-size: 10px; }
.landing__artifact figcaption span { color: var(--green-dim); }
.landing__footer { padding-top: 17px; border-top: 1px solid #263027; }
.landing__footer p { margin: 0; color: #6d7a6d; font-size: 10px; letter-spacing: .1em; }
.landing__footer p:nth-child(2) { color: #a3b09f; }
.landing__seal { color: var(--green-dim); font-size: 25px; line-height: 1; }

/* ---------- CRT overlays ---------- */

.crt-scanlines {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.18) 0px,
    rgba(0, 0, 0, 0.18) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.35;
  mix-blend-mode: multiply;
}

.crt-vignette {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 51;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0) 55%,
    rgba(0, 0, 0, 0.55) 100%
  );
}

@keyframes flicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.94; }
  94% { opacity: 1; }
  97% { opacity: 0.97; }
}

.terminal {
  animation: flicker 7s infinite;
}

@media (prefers-reduced-motion: reduce) {
  .terminal { animation: none; }
}

/* ---------- Terminal frame ---------- */

.terminal {
  width: 100%;
  max-width: 880px;
  height: min(720px, 88vh);
  background: var(--terminal);
  border: 1px solid var(--terminal-border);
  border-radius: 4px;
  box-shadow:
    0 0 0 1px rgba(57, 255, 20, 0.05),
    0 0 40px rgba(57, 255, 20, 0.06),
    0 20px 60px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--terminal-border);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--green-dim);
  flex-shrink: 0;
}

.terminal-header__title {
  color: var(--green);
}

.terminal-header__status .ok {
  color: var(--green);
}

.terminal-header__status .err {
  color: var(--error);
}

.terminal-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.terminal-header__button {
  padding: 5px 8px;
  color: var(--green-dim);
  font-size: 10px;
}

.terminal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 22px;
  font-size: 15px;
  line-height: 1.65;
  scrollbar-width: thin;
  scrollbar-color: var(--green-dark) var(--terminal);
}

.terminal-body::-webkit-scrollbar { width: 8px; }
.terminal-body::-webkit-scrollbar-thumb { background: var(--green-dark); border-radius: 4px; }
.terminal-body::-webkit-scrollbar-track { background: var(--terminal); }

.line {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0 0 2px 0;
}

.line--system { color: var(--green-dim); }
.line--narrative { color: var(--text); }
.line--prompt { color: var(--green); font-weight: 500; }
.line--error { color: var(--error); }
.line--warning { color: var(--warning); }
.line--success { color: var(--green); }
.line--echo { color: var(--green-dim); }
.line--blank { height: 0.9em; }

.cursor-blink {
  display: inline-block;
  width: 0.55em;
  background: var(--green);
  margin-left: 2px;
  animation: blink 1s step-start infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .cursor-blink { animation: none; opacity: 1; }
}

/* ---------- Input line ---------- */

.terminal-inputline {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--terminal-border);
  flex-shrink: 0;
  background: var(--terminal);
}

.terminal-inputline__prompt {
  color: var(--green);
  font-weight: 700;
  user-select: none;
}

.terminal-inputline__field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 15px;
  caret-color: var(--green);
  padding: 6px 2px;
}

.terminal-inputline__field::placeholder {
  color: var(--green-dark);
}

.terminal-inputline__field:focus {
  text-shadow: 0 0 6px rgba(57, 255, 20, 0.6);
}

.terminal-inputline__field:disabled {
  opacity: 0.35;
}

.terminal-inputline__submit {
  background: transparent;
  border: 1px solid var(--green-dark);
  color: var(--green-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  border-radius: 2px;
  cursor: pointer;
}

.terminal-inputline__submit:hover:not(:disabled),
.terminal-inputline__submit:focus-visible:not(:disabled) {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.25);
}

.terminal-inputline__submit:disabled {
  opacity: 0.3;
  cursor: default;
}

/* Visible focus for accessibility */
:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* ---------- Inline command buttons (hint / view / download / retry) ---------- */

.term-btn {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--green-dark);
  color: var(--green-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 6px 10px;
  margin: 4px 8px 4px 0;
  border-radius: 2px;
  cursor: pointer;
  letter-spacing: 0.03em;
}

.term-btn:hover, .term-btn:focus-visible {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 6px rgba(57, 255, 20, 0.2);
}

.term-btn-row { margin: 6px 0 10px 0; }

/* ---------- File block ---------- */

.file-block {
  border: 1px solid var(--terminal-border);
  background: rgba(11, 61, 11, 0.12);
  padding: 12px 14px;
  margin: 10px 0 14px 0;
  border-radius: 2px;
}

.file-block__meta {
  color: var(--green-dim);
  font-size: 13px;
  margin-bottom: 8px;
}

.file-block__meta strong { color: var(--text); }

.file-viewer-frame {
  margin-top: 10px;
  max-width: 100%;
}

.file-viewer-frame img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--terminal-border);
  cursor: zoom-in;
}

.file-viewer-frame iframe {
  width: 100%;
  height: 420px;
  border: 1px solid var(--terminal-border);
  background: #000;
}

.file-viewer-frame audio {
  width: 100%;
  filter: sepia(1) hue-rotate(60deg) saturate(3);
  margin-top: 6px;
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.lightbox[hidden] { display: none; }

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  border: 1px solid var(--terminal-border);
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: 1px solid var(--green-dark);
  color: var(--green);
  font-family: var(--font-mono);
  padding: 6px 10px;
  cursor: pointer;
}

/* ---------- Terminated state ---------- */

.terminal.terminated {
  filter: brightness(0.55);
}

.terminal.terminated .terminal-inputline {
  opacity: 0.4;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  body { padding: 0; }

  .landing {
    min-height: 100vh;
    border-left: none;
    border-right: none;
    padding: 42px 24px;
  }

  .landing__masthead,
  .landing__footer { align-items: flex-start; flex-wrap: wrap; }
  .landing__masthead span:last-child { display: none; }
  .landing__main { grid-template-columns: 1fr; gap: 38px; padding: 44px 0; }
  .landing__artifact { order: -1; justify-self: start; max-width: 205px; }
  .landing__artifact img { max-height: 260px; }
  .landing__footer p { max-width: 24ch; }

  .terminal {
    max-width: 100%;
    height: 100vh;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .terminal-body { font-size: 14px; padding: 14px 14px; }
  .terminal-header { font-size: 10px; padding: 8px 12px; }
  .terminal-header__title { max-width: 40%; }
  .terminal-header__actions { gap: 5px; }
  .terminal-header__status { display: none; }
  .terminal-inputline { padding: 10px 12px; }
  .terminal-inputline__submit { padding: 10px 12px; font-size: 11px; }
  .file-viewer-frame iframe { height: 300px; }
}