:root {
  /* Paleta cyberpunk: fondo casi negro, cian como acento principal y
     magenta como acento secundario para glow/detalles puntuales. */
  --color-bg: #05070d;
  --color-surface: #10141f;
  --color-text: #e8fbff;
  --color-muted: #7a89a8;
  --color-accent: #00e5ff;
  --color-accent-2: #ff2ec4;
  --color-accent-100: #e3fbff;
  --color-accent-300: #7ce8f5;
  --color-accent-700: #0d7c8c;
  --color-accent-800: #123244;
  --color-accent-900: #0b1c2b;
  --color-neutral-300: #9fb0d1;
  --color-neutral-400: #7686a8;
  --color-neutral-700: #22283d;
  --color-neutral-800: #171b2b;
  --glow-accent: 0 0 18px rgba(0, 229, 255, 0.35);
  --glow-accent-2: 0 0 18px rgba(255, 46, 196, 0.35);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.screen {
  flex: 1;
  padding: 24px 20px 100px;
}

h1, h2, h3 { font-weight: 600; margin: 0; font-family: var(--font-display); }

.center-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
  gap: 8px;
}

.logo-badge {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: var(--color-accent-800); color: var(--color-accent-300);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 14px;
}

.subtitle { color: var(--color-neutral-300); font-size: 13px; margin-top: 4px; }

#gsi-button-holder { margin-top: 28px; }

.card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 14px;
}

.rank-card {
  background: linear-gradient(160deg, var(--color-accent-900), var(--color-neutral-800));
  border: 1px solid var(--color-accent-700);
  box-shadow: var(--glow-accent);
}

.row { display: flex; align-items: center; gap: 12px; }
.row-between { display: flex; align-items: center; justify-content: space-between; }

/* Envoltorio solo del home: un resplandor ambiente muy tenue detrás del
   encabezado, para que la pantalla no arranque en negro plano. A propósito
   no se toca `.screen` (compartida por todas las pantallas). */
.home-glow { position: relative; }
.home-glow::before {
  content: '';
  position: absolute;
  top: -24px; left: 50%;
  width: 320px; height: 220px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(0, 229, 255, 0.10), transparent 75%);
  pointer-events: none;
  z-index: 0;
}
.home-glow > * { position: relative; z-index: 1; }

.avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-accent-800); color: var(--color-accent-300);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 15px; flex-shrink: 0; overflow: hidden; cursor: pointer;
  border: 2px solid var(--color-accent-700);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }

.greeting-name { font-size: 22px; font-weight: 600; }
.greeting-hi { font-size: 12px; color: var(--color-neutral-300); }

.tag {
  font-size: 11px; padding: 5px 10px; border-radius: 99px;
  background: var(--color-accent-800); color: var(--color-accent-300);
  border: 1px solid var(--color-accent-700);
}

.stat-grid { display: flex; gap: 12px; margin-bottom: 18px; }
.stat-box { flex: 1; text-align: center; transition: transform 0.15s ease; }
.stat-box:hover { transform: translateY(-2px); }
.stat-icon {
  width: 34px; height: 34px; margin: 0 auto 8px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  color: var(--color-accent-300); background: rgba(0, 229, 255, 0.12);
}
.stat-icon.tint-accent2 { background: rgba(255, 46, 196, 0.14); color: #ff9adf; }
.stat-value { font-family: var(--font-display); font-size: 19px; font-weight: 700; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat-label { font-size: 11px; color: var(--color-neutral-300); margin-top: 2px; }

.progress-track {
  width: 100%; height: 8px; border-radius: 99px;
  background: var(--color-neutral-700); overflow: hidden; margin-top: 6px;
}
.progress-fill {
  height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
}

.section-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; margin: 4px 0 12px;
}
.section-title::before {
  content: ''; width: 3px; height: 13px; border-radius: 2px;
  background: var(--color-accent); opacity: 0.7;
}

/* Timeline: cada fila es un punto que se conecta con la siguiente por una
   línea fina. Se usa tanto en "Actividad reciente" del home como en el
   historial de la pantalla de carga por ejercicio — mismo patrón (lista de
   eventos con fecha), misma resolución visual. */
.activity-row { position: relative; padding-left: 20px; padding-bottom: 18px; }
.activity-row:last-child { padding-bottom: 0; }
.activity-row::before {
  content: ''; position: absolute; left: 0; top: 5px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-accent); box-shadow: 0 0 6px rgba(0, 229, 255, 0.6);
}
.activity-row:not(:last-child)::after {
  content: ''; position: absolute; left: 3px; top: 14px; bottom: -18px; width: 1px;
  background: var(--color-neutral-800);
}
.activity-name { font-weight: 600; font-size: 15px; }
.activity-detail { font-size: 12px; color: var(--color-neutral-300); margin-top: 2px; }
.activity-time { font-size: 11px; color: var(--color-neutral-400); white-space: nowrap; flex-shrink: 0; padding-left: 10px; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--color-neutral-300); margin-bottom: 5px; }
.gym-description { font-size: 12px; color: var(--color-neutral-300); margin-top: 8px; }
.input {
  width: 100%; padding: 10px 12px; font-size: 14px;
  background: var(--color-bg); color: var(--color-text);
  border: 1px solid var(--color-neutral-700); border-radius: var(--radius-md);
}
.input:focus { outline: none; border-color: var(--color-accent); }
.input-row { display: flex; gap: 12px; }
.input-row .field { flex: 1; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; padding: 12px; font-size: 14px; font-weight: 600;
  border-radius: var(--radius-md); cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--color-accent); color: #05070d; box-shadow: var(--glow-accent); }
.btn-secondary { background: transparent; border-color: var(--color-neutral-700); color: var(--color-text); }

.gym-option {
  padding: 14px; border-radius: var(--radius-md); background: var(--color-surface);
  border: 1px solid var(--color-neutral-700); margin-bottom: 10px; cursor: pointer;
}
.gym-option.selected { border-color: var(--color-accent); color: var(--color-accent-300); }

.lb-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: var(--radius-md); background: var(--color-surface); border: 1px solid var(--color-neutral-700); margin-bottom: 10px; }
.lb-row.me { background: var(--color-accent-900); border-color: var(--color-accent-700); }
.lb-pos { width: 24px; font-weight: 700; text-align: center; color: var(--color-neutral-400); flex-shrink: 0; }
.lb-name { font-size: 13px; }
.lb-tier { font-size: 11px; color: var(--color-neutral-300); }
.lb-xp { font-family: var(--font-display); font-weight: 600; font-size: 13px; color: var(--color-accent-300); margin-left: auto; }

.bottom-nav {
  position: sticky; bottom: 0; left: 0; right: 0;
  display: flex; justify-content: space-around; align-items: center;
  padding: 12px 12px 20px; background: var(--color-neutral-800);
  border-top: 1px solid var(--color-neutral-700);
}
.nav-item { display: flex; flex-direction: column; align-items: center; gap: 4px; cursor: pointer; color: var(--color-neutral-400); font-size: 10px; }
.nav-item.active { color: var(--color-accent-300); }
.nav-icon { display: inline-flex; font-size: 20px; line-height: 1; }

.toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%);
  background: var(--color-accent-700); color: var(--color-text);
  padding: 10px 18px; border-radius: var(--radius-md); font-size: 13px; font-weight: 600;
  white-space: nowrap; z-index: 10;
}

.back-row { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; cursor: pointer; }
.back-arrow { display: inline-flex; font-size: 18px; color: var(--color-neutral-300); }

.tree-cta {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-radius: var(--radius-md);
  background: var(--color-accent-900); border: 1px solid var(--color-accent-700);
  color: var(--color-accent-300); font-size: 13px; font-weight: 600;
  margin-bottom: 16px; cursor: pointer;
}

.tree { position: relative; margin-top: 4px; }
.tree-node { position: relative; display: flex; gap: 14px; padding-bottom: 26px; }
.tree-node:last-child { padding-bottom: 0; }
.tree-node:not(:last-child)::before {
  content: ''; position: absolute; left: 17px; top: 36px; bottom: -26px; width: 2px;
  background: var(--color-neutral-700);
}
.tree-node.completed:not(:last-child)::before,
.tree-node.current:not(:last-child)::before { background: var(--color-accent); }

.tree-node-marker {
  width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0; z-index: 1;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-neutral-800); color: var(--color-neutral-400); font-size: 14px;
}
.tree-node.completed .tree-node-marker { background: var(--color-accent-800); color: var(--color-accent-300); }
.tree-node.current .tree-node-marker { background: var(--color-accent); color: #05070d; font-weight: 700; box-shadow: var(--glow-accent); }

.tree-node-body { flex: 1; padding-top: 4px; }
.tree-node-name { font-weight: 600; font-size: 14px; }
.tree-node-meta { font-size: 11px; color: var(--color-neutral-300); margin-top: 2px; }
.tree-node.locked .tree-node-name, .tree-node.locked .tree-node-meta { color: var(--color-neutral-400); }
.tree-node.current .tree-node-body {
  background: var(--color-surface); border-radius: var(--radius-md);
  padding: 10px 12px; margin-top: -4px;
}

.muted-quote {
  font-size: 13px; color: var(--color-neutral-300); font-style: italic; text-align: center;
  padding: 4px 26px; margin: 6px 0 22px; opacity: 0.85; line-height: 1.5;
}

.error-text { color: #e08a8a; font-size: 13px; margin-top: 8px; }

.section-divider { height: 1px; background: var(--color-neutral-800); margin: 24px 0 16px; }

.routine-day-row, .routine-exercise-row { margin-bottom: 12px; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.chip {
  font-size: 12px; padding: 6px 12px; border-radius: 99px; cursor: pointer;
  background: var(--color-surface); border: 1px solid var(--color-neutral-700); color: var(--color-neutral-300);
}
.chip.active { background: var(--color-accent-800); border-color: var(--color-accent-700); color: var(--color-accent-300); }

.catalog-row {
  padding: 12px 14px; border-radius: var(--radius-md); background: var(--color-surface);
  border: 1px solid var(--color-neutral-700); margin-bottom: 8px; cursor: pointer;
}
.catalog-row:active { border-color: var(--color-accent); }

.chart-card { margin-bottom: 20px; }
.chart-wrap { position: relative; width: 100%; }

.timer-card { text-align: center; }
.timer-display {
  font-family: var(--font-display); font-size: 40px; font-weight: 700;
  color: var(--color-accent-300); letter-spacing: 1px; font-variant-numeric: tabular-nums;
}

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.75);
  display: flex; align-items: center; justify-content: center;
  padding: 24px; z-index: 20;
}
.modal-card {
  background: var(--color-surface); border: 1px solid var(--color-accent-2);
  border-radius: var(--radius-lg); padding: 28px 24px; max-width: 340px; width: 100%;
  text-align: center; box-shadow: var(--glow-accent-2);
}
.modal-badge { display: inline-flex; font-size: 32px; color: var(--color-accent-2); margin-bottom: 10px; }
.modal-rank { font-size: 20px; font-weight: 700; color: var(--color-accent-300); margin: 6px 0 12px; }
.modal-phrase { font-size: 13px; color: var(--color-neutral-300); margin-bottom: 20px; }