/* ─────────────────────────────────────────────
   matrix-body-system / styles.css
   dark, cinematic, restrained
───────────────────────────────────────────── */

:root {
  --color-bg:       #0a0a0a;
  --color-text:     #f2f2ee;
  --color-muted:    #8a8a82;
  --color-accent:   #baff2c;
  --color-border:   rgba(242,242,238,0.12);
  --color-overlay:  rgba(10,10,10,0.66);
  --color-overlay-heavy: rgba(10,10,10,0.78);

  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --transition-base: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.28s ease;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ── background media ── */
#bg-media {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

#bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 1;
  transition: opacity var(--transition-base);
}

#bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-base);
}

#bg-media.video-failed #bg-video {
  opacity: 0;
}
#bg-media.video-failed #bg-image {
  opacity: 1;
}

.overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
}

.overlay--heavy {
  background: var(--color-overlay-heavy);
}

/* ── screens ── */
.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.screen.active {
  opacity: 1;
  pointer-events: all;
}

/* result / qr screens need their own bg */
#screen-result,
#screen-qr {
  background: transparent;
}

.result-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.result-bg-wrap video,
.result-bg-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.result-bg-wrap img {
  opacity: 0;
  transition: opacity var(--transition-base);
}

.result-bg-wrap.video-failed video {
  opacity: 0;
}
.result-bg-wrap.video-failed img {
  opacity: 1;
}

/* ── screen content ── */
.screen-content {
  position: relative;
  z-index: 20;
  width: 100%;
  max-width: 660px;
  padding: 2rem;
  text-align: center;
}

.screen-content.centered {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* ── typography ── */
.label-mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  text-transform: lowercase;
}

.title-main {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--color-text);
}

.intro-text {
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  font-weight: 300;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 480px;
}

.prompt-text {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-text);
  max-width: 520px;
}

.helper-text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-muted);
  line-height: 1.6;
  max-width: 420px;
}

/* ── textarea ── */
.textarea-wrap {
  width: 100%;
  max-width: 540px;
  position: relative;
}

textarea {
  width: 100%;
  background: rgba(242,242,238,0.04);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.65;
  padding: 1.1rem 1.25rem;
  resize: none;
  outline: none;
  border-radius: 2px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  caret-color: var(--color-accent);
  -webkit-appearance: none;
}

textarea::placeholder {
  color: var(--color-muted);
  opacity: 0.55;
}

textarea:focus {
  border-color: rgba(186,255,44,0.35);
  background: rgba(242,242,238,0.06);
}

.char-counter {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-muted);
  text-align: right;
  margin-top: 0.45rem;
  transition: color var(--transition-fast);
}

.char-counter.near-limit {
  color: var(--color-accent);
}

/* ── buttons ── */
.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--color-bg);
  background: var(--color-accent);
  border: none;
  padding: 0.85rem 2.4rem;
  cursor: pointer;
  border-radius: 1px;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  text-transform: lowercase;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.22;
  cursor: not-allowed;
}

.btn-secondary {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.75rem 2rem;
  cursor: pointer;
  border-radius: 1px;
  transition: border-color var(--transition-fast), color var(--transition-fast);
  text-transform: lowercase;
  margin-top: 0.5rem;
}

.btn-secondary:hover {
  border-color: rgba(242,242,238,0.3);
  color: var(--color-text);
}

/* ── processing screen ── */
#screen-processing {
  background: var(--color-bg);
}

.processing-label {
  animation: pulse 1.8s ease-in-out infinite;
}

.processing-bar {
  width: 260px;
  height: 1px;
  background: rgba(242,242,238,0.1);
  position: relative;
  overflow: hidden;
}

.processing-fill {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  animation: scan 1.8s ease-in-out infinite;
}

.processing-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  animation: pulse 1.8s ease-in-out infinite 0.3s;
}

@keyframes scan {
  0%   { left: -100%; }
  50%  { left: 0%; }
  100% { left: 100%; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}

/* ── result state labels ── */
.state-label {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  color: var(--color-text);
  text-transform: lowercase;
}

.state-subtext {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: lowercase;
}

/* ── qr container ── */
#qr-container {
  padding: 1.4rem;
  background: #f2f2ee;
  border-radius: 2px;
  display: inline-block;
  line-height: 0;
}

#qr-container canvas,
#qr-container img {
  display: block;
  width: 180px !important;
  height: 180px !important;
}

/* ── inactivity bar ── */
.inactivity-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--color-accent);
  width: 100%;
  transform-origin: left;
  transform: scaleX(1);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.inactivity-bar.counting {
  opacity: 0.55;
  transition: transform linear, opacity 0.3s ease;
}

/* ── screen fade directions ── */
.screen-content {
  transform: translateY(6px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  opacity: 0;
}

.screen.active .screen-content {
  opacity: 1;
  transform: translateY(0);
}