/* ==========================================================================
   base.css — Reset + estilos globales + layout raíz
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  /* Ambiente mínimo — el color lo ponen los blobs, no el fondo */
  background-image:
    radial-gradient(circle at 14% 18%, var(--ambient-cyan) 0%, transparent 26%),
    radial-gradient(circle at 78% 14%, var(--ambient-peach) 0%, transparent 30%),
    radial-gradient(circle at 84% 74%, var(--ambient-violet) 0%, transparent 32%),
    radial-gradient(circle at 28% 86%, var(--ambient-gold) 0%, transparent 22%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100dvh;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

ul, ol {
  list-style: none;
}

/* --- App wrapper --- */
#app {
  position: relative;
  min-height: 100dvh;
  width: 100%;
  overflow: hidden;
  background-color: var(--color-bg);
  isolation: isolate;
}

/* Capa ambiental continua detrás de toda la experiencia */
#app::before,
#app::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
}

#app::before {
  z-index: 0;
  opacity: 0.45;
  /* Halos muy reducidos — no compiten con los blobs */
  background:
    radial-gradient(circle at 16% 22%, rgba(128, 233, 245, 0.06) 0%, transparent 26%),
    radial-gradient(circle at 74% 18%, rgba(255, 150, 132, 0.07) 0%, transparent 32%),
    radial-gradient(circle at 76% 72%, rgba(130, 107, 255, 0.04) 0%, transparent 28%),
    radial-gradient(circle at 20% 82%, rgba(255, 205, 112, 0.04) 0%, transparent 20%);
}

#app::after {
  z-index: 1;
  opacity: var(--ambient-grid-opacity);
  background-image:
    linear-gradient(rgba(255,255,255,0.82) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.72) 1px, transparent 1px);
  background-size: 100% 176px, 176px 100%;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.15) 28%, transparent 78%);
}

/* --- Contenedor de pantallas ---
   Centrado en desktop, full-width en mobile */
#screen-container {
  position: relative;
  width: 100%;
  max-width: var(--app-max-width);
  min-height: 100dvh;
  margin: 0 auto;
  z-index: var(--z-content);
}

/* --- Blobs de fondo globales --- */
#bg-blobs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-blob);
  overflow: hidden;
}

.blob--bg {
  position: absolute;
  opacity: var(--blob-opacity-bg);
  filter: var(--blob-filter-lg);
  animation: blob-float-bg var(--duration-blob) var(--ease-organic) infinite alternate;
}

.blob--bg.blob--1 {
  width: var(--blob-size-xl);
  height: var(--blob-size-xl);
  top: -14%;
  right: -18%;
  border-radius: var(--blob-shape-a);
  animation-delay: 0ms;
  animation-duration: 7200ms;
}

.blob--bg.blob--2 {
  width: var(--blob-size-lg);
  height: var(--blob-size-lg);
  bottom: -10%;
  left: -16%;
  border-radius: var(--blob-shape-b);
  animation-delay: -2400ms;
  animation-duration: 6600ms;
}

/* --- Tipografía base --- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-base);
  color: var(--color-text-secondary);
}

.text-display {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: var(--weight-regular);
}

.text-display--italic {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
}

.text-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.text-body {
  font-family: var(--font-ui);
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-secondary);
}

/* --- Animaciones globales --- */

@keyframes blob-float-bg {
  0%   { transform: translate(0, 0) scale(1) rotate(0deg); }
  33%  { transform: translate(var(--blob-float-x), calc(var(--blob-float-y) * -1)) scale(1.06) rotate(4deg); }
  66%  { transform: translate(calc(var(--blob-float-x) * -0.8), var(--blob-float-y)) scale(0.96) rotate(-4deg); }
  100% { transform: translate(0, 0) scale(1) rotate(0deg); }
}

/* Versión mobile-only: solo transform, sin border-radius.
   border-radius NO es GPU-compositable → re-rasteriza cada frame → jank + flash.
   Esta versión corre íntegra en el compositor, cero repaints. */
@keyframes blob-float-mobile {
  0%   { transform: translate(0, 0) scale(1); }
  25%  { transform: translate(var(--blob-float-x), calc(var(--blob-float-y) * -0.5)) scale(1.04); }
  50%  { transform: translate(calc(var(--blob-float-x) * -0.4), var(--blob-float-y)) scale(0.97); }
  75%  { transform: translate(calc(var(--blob-float-x) * 0.7), calc(var(--blob-float-y) * 0.4)) scale(1.02); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes blob-float {
  0%   { transform: translate(0, 0)                    scale(1);    border-radius: var(--blob-shape-a); }
  25%  { transform: translate(var(--blob-float-x), calc(var(--blob-float-y) * -0.5)) scale(1.05); border-radius: var(--blob-shape-b); }
  50%  { transform: translate(calc(var(--blob-float-x) * -0.4), var(--blob-float-y)) scale(0.97); border-radius: var(--blob-shape-c); }
  75%  { transform: translate(calc(var(--blob-float-x) * 0.7), calc(var(--blob-float-y) * 0.4))  scale(1.02); border-radius: var(--blob-shape-d); }
  100% { transform: translate(0, 0)                    scale(1);    border-radius: var(--blob-shape-a); }
}

@keyframes blob-wave {
  0%   { transform: translate(-50%, -50%) scale(0.98); opacity: 0.42; }
  50%  { transform: translate(-50%, -50%) scale(var(--blob-wave-scale)); opacity: 0.2; }
  100% { transform: translate(-50%, -50%) scale(1.34); opacity: 0; }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.90); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes blob-expand {
  from { transform: scale(1); opacity: var(--blob-opacity-selected); }
  to   { transform: scale(20); opacity: 1; }
}

@keyframes text-reveal-line {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-ring {
  0%   { transform: scale(1);    opacity: var(--player-pulse-opacity); }
  100% { transform: scale(2.2);  opacity: 0; }
}

@keyframes jar-fill {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

/* --- Clases de utilidad --- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.screen {
  position: absolute;
  inset: 0;
  min-height: 100dvh;
  padding: var(--screen-padding-y) var(--screen-padding-x);
  display: flex;
  flex-direction: column;
  background: transparent;
  transition: opacity var(--transition-screen);
  z-index: 2;
  /* Global 2: scroll para que los botones nunca queden cortados */
  overflow-y: auto;
  overflow-x: hidden;
  /* Safe area para iPhone con home indicator */
  padding-bottom: max(calc(var(--screen-padding-y) + var(--space-6)), calc(env(safe-area-inset-bottom, 0px) + var(--space-12)));
}

/* Spacer universal al final del scroll — funciona incluso en screens con padding:0.
   Garantiza que el último elemento nunca quede cortado por el borde o el home indicator.
   64px es suficiente para cualquier home indicator actual (iPhone: 34px, Android: ~22px). */
.screen::after {
  content: '';
  display: block;
  height: max(var(--space-16), calc(env(safe-area-inset-bottom, 0px) + var(--space-6)));
  flex-shrink: 0;
  pointer-events: none;
}

/* Pantallas con tab-bar ya tienen clearance propio — el spacer sería excesivo */
.app--has-tabbar .screen::after {
  display: none;
}

.screen--entering {
  animation: fade-in var(--duration-screen) var(--ease-out) forwards;
}

.screen--leaving {
  animation: fade-out var(--duration-screen) var(--ease-in) forwards;
}

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

/* Global 2: garantía de espacio inferior en todos los footers de pantalla
   Asegura que ningún botón quede cortado por el borde ni el home indicator */
[class$="__footer"],
[class$="__actions"] {
  padding-bottom: max(var(--space-14), calc(env(safe-area-inset-bottom, 0px) + var(--space-10)));
}

/* Tab bar visible — pantallas necesitan espacio extra al fondo */
.app--has-tabbar .screen {
  padding-bottom: calc(var(--tab-bar-height) + var(--space-10) + env(safe-area-inset-bottom, 0px));
}

.app--has-tabbar [class$="__footer"],
.app--has-tabbar [class$="__actions"] {
  padding-bottom: calc(var(--tab-bar-height) + var(--space-8) + env(safe-area-inset-bottom, 0px));
}

/* --- Responsive: desktop --- */

@media (min-width: 768px) {
  #screen-container {
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    margin: var(--space-8) auto;
    min-height: calc(100dvh - var(--space-16));
    background:
      linear-gradient(180deg, rgba(255,255,255,0.44) 0%, rgba(255,255,255,0.14) 100%),
      var(--color-bg);
    border: 1px solid rgba(255, 255, 255, 0.46);
  }

  #app {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background-color: var(--color-bg-soft);
  }

  .screen {
    min-height: calc(100dvh - var(--space-16));
  }
}

@media (min-width: 1024px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

  .text-display {
    font-size: var(--text-4xl);
  }

  #screen-container {
    max-width: min(90vw, 1120px);
  }
}