/* Encuestapp — sistema de diseño público (fuente: DESIGN.md) */

:root {
  color-scheme: light;

  --color-canvas: #fbf7f0;
  --color-canvas-deep: #f3ece1;
  --color-surface: #ffffff;
  --color-surface-subtle: #fbf8f2;
  --color-ink: #1c1a17;
  --color-ink-hover: #2f2c27;
  --color-text-muted: #7d766a;
  --color-text-soft: #8a8378;
  --color-text-faint: #a39c8f;
  --color-border: #e9e2d5;
  --color-border-strong: #d8cfbe;
  --color-track: #efe8da;
  --color-accent: #c2531d;
  --color-accent-soft: #f4e3d3;
  --color-success: #3f8a4f;
  --color-error: #a83d32;
  --color-focus: #c2531d;

  --color-ambient-peach: #e7b48c;
  --color-ambient-sage: #c9d9c4;
  --color-ambient-sand: #e3cfa4;

  --font-display: "Fraunces", ui-serif, serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-body: 1rem;
  --text-question: clamp(1.625rem, 1.45rem + 0.8vw, 1.875rem);
  --text-title: clamp(1.875rem, 1.6rem + 1.2vw, 2.5rem);

  --leading-tight: 1.15;
  --leading-body: 1.6;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-14: 3.5rem;

  --radius-control: 1rem;
  --radius-card: 1.75rem;
  --radius-pill: 999px;

  --shadow-card: 0 30px 60px -25px rgb(28 26 23 / 0.35);
  --shadow-selected: 0 6px 18px -8px rgb(194 83 29 / 0.45);
  --shadow-action: 0 10px 20px -8px rgb(28 26 23 / 0.5);

  --duration-fast: 150ms;
  --duration-normal: 180ms;
  --duration-panel: 450ms;
  --ease-standard: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-progress: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; }

/* El atributo hidden debe ganar siempre, aun sobre displays explícitos. */
[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-canvas);
  min-height: 100vh;
  min-height: 100dvh;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}

/* --- Ambiente --- */
.ambient {
  position: fixed; inset: 0;
  overflow: hidden;
  z-index: 0;
  background: radial-gradient(circle at 50% 20%, var(--color-canvas) 0%, var(--color-canvas-deep) 100%);
}

.ambient-blob {
  position: absolute;
  width: 38vmax; height: 38vmax;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: float 14s ease-in-out infinite alternate;
}

.ambient-blob--peach { background: var(--color-ambient-peach); top: -12vmax; left: -8vmax; }
.ambient-blob--sage { background: var(--color-ambient-sage); bottom: -14vmax; right: -10vmax; animation-delay: -5s; }
.ambient-blob--sand { background: var(--color-ambient-sand); top: 40%; left: 60%; animation-delay: -9s; }

.ambient-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgb(28 26 23 / 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgb(28 26 23 / 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

@keyframes float {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(2vmax, 3vmax, 0); }
}

/* --- Estructura --- */
.shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-14) var(--space-4);
  padding-top: max(var(--space-14), env(safe-area-inset-top));
  padding-bottom: max(var(--space-14), env(safe-area-inset-bottom));
}

.time-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-ink);
  color: var(--color-canvas);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.time-pill-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-ambient-peach);
}

.card {
  width: 100%;
  max-width: 36rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px;
}

@media (min-width: 640px) {
  .card { padding: 40px; }
}

.footnote {
  max-width: 36rem;
  margin: var(--space-4) 0 0;
  font-size: var(--text-xs);
  color: var(--color-text-soft);
  text-align: center;
}

/* --- Esqueleto de carga --- */
.skeleton { display: grid; gap: var(--space-4); }
.skeleton-bar, .skeleton-block {
  border-radius: var(--radius-control);
  background: linear-gradient(90deg, var(--color-track) 25%, var(--color-surface-subtle) 50%, var(--color-track) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
.skeleton-bar--sm { height: 10px; width: 40%; }
.skeleton-bar--lg { height: 34px; width: 85%; }
.skeleton-block { height: 64px; }

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* --- Progreso --- */
.progress { margin-bottom: var(--space-6); }

.progress-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-track);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 100%;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--duration-panel) var(--ease-progress);
}

/* --- Avisos --- */
.notice {
  margin: 0 0 var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface-subtle);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.notice p { margin: 0; }

.notice--error {
  border-color: var(--color-error);
  color: var(--color-error);
  background: #fdf3f1;
}

.notice--error .btn { margin-top: var(--space-3); }

/* --- Panel de preguntas --- */
.panel-area { min-height: 300px; }

@media (min-width: 640px) {
  .panel-area { min-height: 420px; }
}

.step { animation: panel-in var(--duration-panel) var(--ease-standard); }

@keyframes panel-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

fieldset {
  margin: 0; padding: 0; border: 0;
  min-width: 0;
}

.question {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-question);
  font-weight: 600;
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-5);
  max-width: 30ch;
}

.question:focus { outline: none; }

h2.question { margin-top: 0; }

.hint {
  margin: calc(-1 * var(--space-3)) 0 var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --- Opciones (radio cards) --- */
.options { display: grid; gap: var(--space-3); }

@media (min-width: 640px) {
  .options--twocol { grid-template-columns: 1fr 1fr; }
}

.option {
  display: flex;
  min-height: 44px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

.option:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
}

.option:has(input:checked) {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  box-shadow: var(--shadow-selected);
}

.option:has(input:focus-visible) {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.option-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
}

.option-title { font-weight: 600; }

.option-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --- Escala 1–5 --- */
.scale {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.scale-btn {
  flex: 1 1 0;
  min-width: 52px;
  min-height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-1);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  cursor: pointer;
  text-align: center;
  transition: transform var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
}

.scale-num {
  font-weight: 700;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.scale-label { font-size: var(--text-xs); color: var(--color-text-muted); }

.scale-btn:hover { transform: translateY(-2px); border-color: var(--color-border-strong); }

.scale-btn:has(input:checked) {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-canvas);
  transform: translateY(-3px);
}

.scale-btn:has(input:checked) .scale-label { color: var(--color-canvas-deep); }

.scale-btn:has(input:focus-visible) {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* --- Chips multiselección --- */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
}

.chip:hover { border-color: var(--color-border-strong); }

.chip:has(input:checked) {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-canvas);
}

.chip:has(input:focus-visible) {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.chip.is-locked {
  opacity: 0.45;
  cursor: not-allowed;
}

/* --- Campos --- */
.fields { display: grid; gap: var(--space-5); }

.field label,
.consent {
  font-size: var(--text-sm);
  font-weight: 600;
}

.field label {
  display: block;
  margin-bottom: var(--space-2);
}

.optional-tag {
  font-weight: 400;
  color: var(--color-text-faint);
}

.field input[type="text"],
.field input[type="tel"],
.field input[type="email"],
.field select {
  width: 100%;
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface);
  font: inherit;
  color: var(--color-ink);
}

.field input:focus-visible,
.field select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.consent {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-weight: 400;
  color: var(--color-text-muted);
  cursor: pointer;
}

.consent input {
  width: 20px; height: 20px;
  margin-top: 2px;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}

/* --- Errores por paso --- */
.step-error {
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-error);
}

/* --- Navegación --- */
.stepnav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.btn {
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

.btn--primary {
  background: var(--color-ink);
  color: var(--color-canvas);
  box-shadow: var(--shadow-action);
}

.btn--primary:hover { background: var(--color-ink-hover); transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text-muted);
}

.btn--ghost:hover { color: var(--color-ink); border-color: var(--color-ink); }

.btn:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.btn[disabled] {
  cursor: default;
  opacity: 0.6;
  transform: none;
}

.btn--hidden { visibility: hidden; }

/* --- Diálogo de repetición --- */
.repeat-dialog {
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface-subtle);
}

.repeat-dialog p { margin: 0 0 var(--space-4); }

.repeat-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* --- Confirmación --- */
.finale {
  text-align: center;
  padding: var(--space-8) 0;
  animation: panel-in var(--duration-panel) var(--ease-standard);
}

.finale:focus { outline: none; }

.finale-title {
  font-family: var(--font-display);
  font-size: var(--text-title);
  font-weight: 600;
  line-height: var(--leading-tight);
  margin: var(--space-4) 0 var(--space-3);
}

.finale-text {
  margin: 0 auto;
  max-width: 40ch;
  color: var(--color-text-muted);
}

.finale-check {
  width: 72px; height: 72px;
  stroke: var(--color-success);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.finale-check-circle {
  stroke-dasharray: 151;
  stroke-dashoffset: 151;
  animation: draw 700ms var(--ease-standard) forwards;
}

.finale-check-mark {
  stroke-dasharray: 36;
  stroke-dashoffset: 36;
  animation: draw 450ms 500ms var(--ease-standard) forwards;
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

/* --- Movimiento reducido / bajo rendimiento --- */
@media (prefers-reduced-motion: reduce) {
  .ambient-blob { animation: none; filter: none; opacity: 0.15; }
  .skeleton-bar, .skeleton-block { animation: none; }
  .step, .finale { animation: none; }
  .progress-fill { transition: none; }
  .finale-check-circle, .finale-check-mark { animation: none; stroke-dashoffset: 0; }
  .option, .scale-btn, .chip, .btn { transition: none; }
  .option:hover, .scale-btn:hover, .btn--primary:hover { transform: none; }
}