:root {
  --md-sys-color-primary: #1b5e4a;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #a8f2d4;
  --md-sys-color-on-primary-container: #002116;
  --md-sys-color-secondary-container: #d4e7df;
  --md-sys-color-on-secondary-container: #0f1f1a;
  --md-sys-color-surface: #f6faf7;
  --md-sys-color-surface-container: #eef3f0;
  --md-sys-color-on-surface: #171d1a;
  --md-sys-color-on-surface-variant: #3f4944;
  --md-sys-color-outline-variant: #bfc9c3;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-tertiary: #f5c542;
  --scan-line: #3dffb0;
  --radius-l: 28px;
  --radius-m: 16px;
  --radius-s: 12px;
  --ctrl-h: 44px;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --font: "Roboto", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
  overflow: hidden;
}

.app {
  height: 100dvh;
  height: 100svh;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding:
    calc(0.65rem + var(--safe-t))
    calc(0.75rem + var(--safe-r))
    calc(0.55rem + var(--safe-b))
    calc(0.75rem + var(--safe-l));
  display: grid;
  grid-template-rows: auto auto minmax(0, 1.05fr) minmax(0, 0.95fr) auto;
  gap: clamp(0.4rem, 1.1vh, 0.7rem);
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: var(--ctrl-h);
}
.topbar h1 {
  margin: 0;
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

/* Controles unificados */
.ctrl {
  appearance: none;
  box-sizing: border-box;
  height: var(--ctrl-h);
  min-height: var(--ctrl-h);
  border: 0;
  border-radius: 999px;
  padding: 0 1rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  touch-action: manipulation;
  user-select: none;
}
.ctrl:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}
.ctrl-tonal {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}
.ctrl-filled {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.ctrl-outline {
  background: transparent;
  color: var(--md-sys-color-primary);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-outline-variant);
}
.ctrl-select {
  width: 100%;
  min-width: 0;
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-outline-variant);
  padding-right: 2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%233f4944' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  cursor: pointer;
}
.ctrl-chip {
  min-width: var(--ctrl-h);
  padding: 0 0.85rem;
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  cursor: default;
}
.ctrl-chip strong { font-weight: 700; }
.ctrl-icon,
.ctrl-fab {
  width: var(--ctrl-h);
  min-width: var(--ctrl-h);
  padding: 0;
  border-radius: 50%;
}
.ctrl-danger {
  background: color-mix(in srgb, var(--md-sys-color-error) 14%, white);
  color: var(--md-sys-color-error);
}
.ctrl-fab {
  background: color-mix(in srgb, #000 42%, transparent);
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.ctrl-fab.is-on {
  background: var(--md-sys-color-tertiary);
  color: #1a1408;
}
.ctrl-fab.is-paused {
  background: color-mix(in srgb, #fff 88%, transparent);
  color: var(--md-sys-color-primary);
}
.ctrl[hidden],
[hidden] {
  display: none !important;
}

.scanner-area,
.list-area {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--radius-l);
  padding: clamp(0.55rem, 1.4vh, 0.85rem);
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.stage-wrap {
  position: relative;
  background: #0b0f0d;
  border-radius: var(--radius-m);
  overflow: hidden;
  width: min(100%, 380px);
  margin: 0 auto;
  flex: 1 1 auto;
  min-height: 140px;
  max-height: min(36dvh, 280px);
  aspect-ratio: 4 / 3;
}
#reader,
#reader > div,
#reader video,
#reader canvas {
  width: 100% !important;
  height: 100% !important;
  border: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
}
#reader video { object-fit: cover !important; }
#reader img { display: none !important; }

.stage-overlay {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
}
.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--scan-line) 30%, var(--scan-line) 70%, transparent);
  opacity: 0;
  transform: translate3d(0, 0, 0);
  will-change: transform;
  contain: layout style;
  pointer-events: none;
}
.stage-wrap.is-scanning:not(.is-paused) .scan-line {
  opacity: 0.85;
  animation: scan-sweep 2.4s linear infinite;
}
@keyframes scan-sweep {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(0, calc(var(--stage-h, 240px) - 2px), 0); }
}

.stage-actions {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.session-bar {
  display: grid;
  grid-template-columns: minmax(5.5rem, 0.7fr) minmax(0, 1.3fr) auto auto auto;
  gap: 0.4rem;
  align-items: center;
}

.field {
  appearance: none;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  height: var(--ctrl-h);
  border: 0;
  border-radius: 999px;
  padding: 0 0.9rem;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface-container);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-outline-variant);
}
.field::placeholder {
  color: color-mix(in srgb, var(--md-sys-color-on-surface-variant) 72%, transparent);
  font-weight: 400;
}
.field:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--md-sys-color-primary) 55%, transparent);
}
.field-list {
  height: 2.15rem;
  margin-bottom: 0.4rem;
  flex-shrink: 0;
  font-size: 0.82rem;
}
.field-ghost {
  height: 1.85rem;
  border-radius: 0;
  padding: 0 0.15rem;
  background: transparent;
  box-shadow: none;
  border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 70%, transparent);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--md-sys-color-on-surface-variant);
}
.field-ghost:focus {
  box-shadow: none;
  border-bottom-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-surface);
}
.manual-add {
  margin: 0.35rem 0 0;
  flex-shrink: 0;
  opacity: 0.55;
  transition: opacity 0.15s ease;
}
.manual-add:focus-within {
  opacity: 1;
}

.sheet {
  border: 0;
  border-radius: var(--radius-l);
  padding: 1.1rem;
  width: min(92vw, 380px);
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  box-shadow: 0 16px 40px color-mix(in srgb, #000 25%, transparent);
}
.sheet::backdrop { background: color-mix(in srgb, #000 40%, transparent); }
.sheet h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 600;
}
.sheet input {
  width: 100%;
  height: var(--ctrl-h);
  border: 0;
  border-radius: 999px;
  padding: 0 0.9rem;
  font: inherit;
  margin-bottom: 0.85rem;
  background: var(--md-sys-color-surface-container);
  box-shadow: inset 0 0 0 1px var(--md-sys-color-outline-variant);
}
.sheet-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}
.sheet-actions .ctrl { width: 100%; }

.options {
  display: flex;
  gap: 0.85rem;
  margin-top: 0.45rem;
  flex-shrink: 0;
}
.check {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.88rem;
  min-height: 40px;
  cursor: pointer;
  user-select: none;
}
.check input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--md-sys-color-primary);
}

.list-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  flex-shrink: 0;
}
.list-head h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}
.muted {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.78rem;
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: auto;
  min-height: 0;
  flex: 1;
  -webkit-overflow-scrolling: touch;
  content-visibility: auto;
}
.list li {
  display: grid;
  gap: 0.1rem;
  padding: 0.65rem 0.75rem;
  margin-bottom: 0.35rem;
  border-radius: var(--radius-s);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  content-visibility: auto;
  contain-intrinsic-size: auto 52px;
}
.list .code {
  font-family: ui-monospace, Consolas, monospace;
  font-weight: 700;
  font-size: 0.92rem;
  word-break: break-all;
}
.list .when {
  font-size: 0.78rem;
  color: var(--md-sys-color-on-surface-variant);
}

.footer {
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.8rem;
  flex-shrink: 0;
}
.footer strong {
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(1rem + var(--safe-b));
  transform: translateX(-50%);
  z-index: 50;
  max-width: min(92vw, 420px);
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  background: #2b342f;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 8px 24px color-mix(in srgb, #000 28%, transparent);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease;
}
.toast.is-show { opacity: 1; }
.toast[hidden] { display: none; }

@media (max-width: 520px) {
  .session-bar {
    grid-template-columns: minmax(0, 1fr) auto auto auto;
  }
  .session-bar .field-search {
    grid-column: 1 / -1;
  }
}

@media (min-width: 860px) {
  .app {
    grid-template-columns: 1.1fr 0.9fr;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    grid-template-areas:
      "top top"
      "sess sess"
      "scan list"
      "foot foot";
  }
  .topbar { grid-area: top; }
  .session-bar { grid-area: sess; }
  .scanner-area { grid-area: scan; }
  .list-area { grid-area: list; }
  .footer { grid-area: foot; }
  .stage-wrap {
    width: min(100%, 440px);
    max-height: none;
    flex: 1;
  }
}

@media (max-height: 640px) {
  .stage-wrap { max-height: min(32dvh, 220px); }
  .options { display: none; }
  .footer { font-size: 0.72rem; }
}

@media (orientation: landscape) and (max-height: 480px) {
  .app {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    grid-template-areas:
      "top top"
      "sess sess"
      "scan list"
      "foot foot";
  }
  .topbar { grid-area: top; }
  .session-bar { grid-area: sess; }
  .scanner-area { grid-area: scan; }
  .list-area { grid-area: list; }
  .footer { grid-area: foot; }
  .stage-wrap {
    max-height: min(58dvh, 240px);
    width: min(100%, 360px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stage-wrap.is-scanning:not(.is-paused) .scan-line {
    animation: none;
    top: 50%;
    opacity: 0.85;
    transform: none;
  }
  .toast { transition: none; }
}