:root {
  --bg: #0A0A0A;
  --bg-soft: #161616;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --fg: #F5F5F5;
  --fg-soft: #9a9a9a;
  --fg-mute: #6E6E6E;
  --accent: #C8102E;
  --accent-deep: #820a1e;
  --accent-soft: rgba(200, 16, 46, 0.18);
  --ok: #2ecc71;
  --warn: #f39c12;
  --error: #e74c3c;
  --border: #2a2a2a;
  --border-soft: #1f1f1f;
  --font: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: "Oswald", var(--font);
}

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

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Shell ────────────────────────────────────────────────────────────── */
.app-shell {
  max-width: 480px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.app-shell-center {
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* ── Brand ────────────────────────────────────────────────────────────── */
.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--accent);
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  line-height: 1;
  color: var(--fg);
}

.brand-copy span {
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--fg-mute);
  text-transform: uppercase;
}

/* ── Topbar (inner pages) ─────────────────────────────────────────────── */
.topbar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.back-btn {
  align-self: flex-start;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-soft);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.4px;
  transition: border-color 120ms ease, color 120ms ease;
  font-family: inherit;
}

.back-btn:hover {
  border-color: var(--accent);
  color: var(--fg);
}

.topbar-title h1 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.3px;
  text-transform: uppercase;
}

/* ── Hero (home) ──────────────────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.eyebrow {
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-weight: 600;
}

.error-eyebrow {
  color: var(--error);
}

.hero h1,
.error-block h1 {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.5px;
  text-transform: uppercase;
}

.lead {
  color: var(--fg-soft);
  line-height: 1.6;
  font-size: 15px;
}

/* ── Nav grid ─────────────────────────────────────────────────────────── */
.nav-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  grid-template-areas:
    "label arrow"
    "hint  arrow";
  gap: 4px 14px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  cursor: pointer;
  text-align: left;
  color: var(--fg);
  font-family: inherit;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

.nav-card:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.nav-card:active:not(:disabled) {
  transform: scale(0.985);
}

.nav-card-label {
  grid-area: label;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.nav-card-hint {
  grid-area: hint;
  font-size: 12.5px;
  color: var(--fg-mute);
}

.nav-card-arrow {
  grid-area: arrow;
  font-size: 22px;
  color: var(--accent);
  font-weight: 400;
}

.nav-card-disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.nav-card-disabled .nav-card-arrow {
  color: var(--fg-mute);
}

/* ── Status chips ─────────────────────────────────────────────────────── */
.status-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
}

.status-block-title {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg);
  margin-bottom: 12px;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.chip {
  background: var(--bg-soft);
  color: var(--fg-soft);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 500;
  border: 1px solid var(--border);
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.chip-ok {
  color: var(--ok);
  border-color: rgba(46, 204, 113, 0.32);
  background: rgba(46, 204, 113, 0.07);
}

.chip-warn {
  color: var(--warn);
  border-color: rgba(243, 156, 18, 0.32);
  background: rgba(243, 156, 18, 0.07);
}

.chip-error {
  color: var(--error);
  border-color: rgba(231, 76, 60, 0.32);
  background: rgba(231, 76, 60, 0.07);
}

.chip-soft {
  background: var(--bg-soft);
  border-color: var(--border);
  color: var(--fg-soft);
  text-transform: capitalize;
}

/* ── Filter chips (library) ───────────────────────────────────────────── */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  background: var(--bg-card);
  color: var(--fg-soft);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  border: 1px solid var(--border);
  cursor: pointer;
  font-family: inherit;
  transition: all 120ms ease;
}

.filter-chip:hover {
  border-color: var(--accent);
  color: var(--fg);
}

.filter-chip.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* ── Exercise list ────────────────────────────────────────────────────── */
.exercise-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exercise-card {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  grid-template-areas:
    "name  arrow"
    "meta  arrow";
  gap: 6px 14px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  text-align: left;
  cursor: pointer;
  color: var(--fg);
  font-family: inherit;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

.exercise-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.exercise-card:active {
  transform: scale(0.99);
}

.exercise-name {
  grid-area: name;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.exercise-meta {
  grid-area: meta;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exercise-chip,
.exercise-chip-muted {
  font-size: 10.5px;
  padding: 3px 9px;
  border-radius: 999px;
  letter-spacing: 0.3px;
}

.exercise-chip {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(200, 16, 46, 0.32);
}

.exercise-chip-muted {
  background: var(--bg-soft);
  color: var(--fg-mute);
  border: 1px solid var(--border-soft);
  text-transform: capitalize;
}

.exercise-arrow {
  grid-area: arrow;
  font-size: 18px;
  color: var(--accent);
}

/* ── Exercise detail ──────────────────────────────────────────────────── */
.exercise-detail {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.exercise-detail h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.4px;
  text-transform: uppercase;
}

.exercise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exercise-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.exercise-specs > div {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.exercise-specs dt {
  font-size: 10.5px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-mute);
  font-weight: 600;
}

.exercise-specs dd {
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  font-family: var(--font-display);
}

.exercise-cue {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exercise-cue h2 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.exercise-cue p {
  color: var(--fg-soft);
  line-height: 1.6;
  font-size: 14px;
}

.exercise-video-link {
  align-self: flex-start;
  background: transparent;
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 8px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}

.exercise-video-link:hover {
  border-color: var(--accent);
}

/* ── Machine detail ───────────────────────────────────────────────────── */
.machine-detail {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.machine-detail h1 {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.3px;
  text-transform: uppercase;
}

.machine-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.machine-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.machine-block h2 {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.machine-block p {
  color: var(--fg-soft);
  line-height: 1.6;
  font-size: 14px;
}

.machine-block-warn {
  border-color: rgba(243, 156, 18, 0.35);
  background: rgba(243, 156, 18, 0.06);
}

.machine-block-warn h2 {
  color: var(--warn);
}

.machine-exercises {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.machine-exercises h2 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fg);
}

/* ── Scanner ──────────────────────────────────────────────────────────── */
.scan-shell {
  gap: 20px;
}

.scan-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  max-height: 65vh;
  background: #000;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.scan-viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.scan-frame {
  position: absolute;
  inset: 14% 14%;
  pointer-events: none;
}

.scan-frame .corner {
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--accent);
  border-style: solid;
  border-width: 0;
}

.scan-frame .corner-tl { top: 0; left: 0; border-top-width: 3px; border-left-width: 3px; border-top-left-radius: 6px; }
.scan-frame .corner-tr { top: 0; right: 0; border-top-width: 3px; border-right-width: 3px; border-top-right-radius: 6px; }
.scan-frame .corner-bl { bottom: 0; left: 0; border-bottom-width: 3px; border-left-width: 3px; border-bottom-left-radius: 6px; }
.scan-frame .corner-br { bottom: 0; right: 0; border-bottom-width: 3px; border-right-width: 3px; border-bottom-right-radius: 6px; }

.scan-fallback {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.scan-fallback-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.scan-fallback input {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  letter-spacing: 1px;
}

.scan-fallback input:focus {
  outline: none;
  border-color: var(--accent);
}

.scan-fallback .primary-btn {
  align-self: flex-start;
}

.scan-manual-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
}

.scan-manual-toggle summary {
  cursor: pointer;
  font-size: 13px;
  color: var(--fg-soft);
  list-style: none;
}

.scan-manual-toggle summary::-webkit-details-marker { display: none; }

.scan-manual-toggle[open] summary {
  margin-bottom: 12px;
  color: var(--fg);
}

.small {
  font-size: 11.5px;
}

/* ── Botones genericos ────────────────────────────────────────────────── */
.primary-btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: background 120ms ease;
  font-family: inherit;
}

.primary-btn:hover {
  background: var(--accent-deep);
}

/* ── Mensajes auxiliares ──────────────────────────────────────────────── */
.muted {
  color: var(--fg-mute);
  font-size: 14px;
  font-style: italic;
}

.error-text {
  color: var(--error);
  font-size: 14px;
}

.error-block {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid rgba(231, 76, 60, 0.32);
  border-radius: 14px;
  padding: 22px 24px;
}

.error-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Routine list & detail ────────────────────────────────────────────── */
.routine-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.routine-header h1 {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.3px;
  text-transform: uppercase;
}

.week-chips {
  margin-top: -6px;
}

.routine-day {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.routine-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.routine-block-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}

.routine-block-section {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
}

.routine-block-count {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.routine-exercises {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.routine-exercise {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-soft);
}

.routine-exercise:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.routine-exercise-name {
  background: transparent;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  letter-spacing: 0.2px;
}

.routine-exercise-name:hover {
  color: var(--accent);
}

.routine-progression {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 6px;
}

.routine-progression > div {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.routine-progression dt {
  font-size: 9.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fg-mute);
  font-weight: 600;
}

.routine-progression dd {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  font-family: var(--font-display);
  letter-spacing: 0.3px;
  word-break: break-word;
}

/* ── Footer ───────────────────────────────────────────────────────────── */
.app-footer {
  margin-top: auto;
  text-align: center;
  color: var(--fg-mute);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding-top: 8px;
}