/* LUTIM · vista previa web. Referencia visual: «Horizonte de noche»
   (noche de tinta, papel para escribir y crear, una sola línea ámbar). */

:root {
  --display: "Sitka Banner", "Sitka Heading", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  --label: Bahnschrift, "DIN Alternate", "Arial Narrow", "Segoe UI", sans-serif;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --amber: #A5752E; --paper: #ECEBE7; --paper-ink: #2A2E3E;
  --bg: #070B14; --surface: #121827; --surface-2: #1A2131;
  --line: rgba(236, 235, 231, .12); --line-2: rgba(236, 235, 231, .22);
  --text: #ECEBE7; --soft: #C2BFB7; --mute: #9A978F;
  --amber-text: #E4B76C; --amber-wash: rgba(165, 117, 46, .18);
  --glass: rgba(11, 16, 28, .78); --user-bg: #1C2335;
  --sheet: var(--paper); --sheet-ink: var(--paper-ink);
  --dawn: radial-gradient(ellipse 70% 46% at 50% 0%, rgba(165, 117, 46, .28), transparent 64%);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ECEBE7; --surface: #F7F5F0; --surface-2: #EFECE5;
    --line: rgba(42, 46, 62, .14); --line-2: rgba(42, 46, 62, .26);
    --text: #2A2E3E; --soft: #464A5A; --mute: #5E5C64;
    --amber-text: #7A5320; --amber-wash: rgba(165, 117, 46, .14);
    --glass: rgba(247, 245, 240, .86); --user-bg: #E2DED4; --sheet: #FFFDF8;
    --dawn: radial-gradient(ellipse 70% 46% at 50% 0%, rgba(165, 117, 46, .2), transparent 64%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh; background: var(--bg); color: var(--text);
  font: 16px/1.55 var(--sans); overflow-x: clip;
}
h1, h2, h3, p, ul, ol { margin: 0; padding: 0; }
ul, ol { list-style: none; }
h1 { font: 400 clamp(1.9rem, 5.2vw, 3.3rem)/1.08 var(--display); letter-spacing: -.02em; text-wrap: balance; }
h1 em { color: var(--amber-text); }
h2, h3 { font: 600 .78rem/1.2 var(--label); letter-spacing: .12em; text-transform: uppercase; color: var(--mute); }

button, textarea { font: inherit; color: inherit; }
button {
  min-height: 44px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--amber);
  background: var(--amber); color: #fff; font-weight: 600; cursor: pointer;
  transition: transform .25s var(--ease), background .25s var(--ease);
}
button:hover { background: #8F6426; }
button:active { transform: scale(.98); }
button.suave, button.atajo, .creacion-barra button {
  background: transparent; color: var(--text); border-color: var(--line-2); font-weight: 500;
}
button.suave:hover, button.atajo:hover, .creacion-barra button:hover { background: var(--amber-wash); }
:focus-visible { outline: 3px solid var(--amber-text); outline-offset: 2px; }

.cargando { padding: 30vh 16px; text-align: center; color: var(--soft); }

/* Aviso de simulación: siempre visible, en todas las pantallas. */
.aviso {
  position: sticky; top: 0; z-index: 5; padding: 9px 16px; text-align: center;
  font-size: .86rem; line-height: 1.4; background: #3A2A12; color: #F6E3C0;
  border-bottom: 1px solid var(--amber);
}
.aviso b { color: #fff; }

.barra {
  display: flex; align-items: center; gap: 12px; padding: 10px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--line); background: var(--glass);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.marca {
  display: inline-flex; align-items: center; gap: 10px; padding: 0 12px 0 6px; border: 0;
  background: transparent; color: var(--text); font: 600 1.05rem/1 var(--label); letter-spacing: .22em;
}
.marca:hover { background: var(--amber-wash); }
.sol { width: 22px; height: 22px; border-radius: 50%; background: radial-gradient(circle at 50% 60%, #E4B76C, var(--amber)); box-shadow: 0 0 18px rgba(165, 117, 46, .7); }
.modo { font: 600 .78rem/1 var(--label); letter-spacing: .12em; text-transform: uppercase; color: var(--amber-text); padding: 7px 12px; border-radius: 999px; background: var(--amber-wash); }
.barra .suave { margin-left: auto; font-size: .9rem; }

/* Inicio */
.inicio {
  position: relative; max-width: 780px; margin: 0 auto;
  padding: clamp(48px, 12vh, 120px) 16px 64px; display: grid; gap: 32px; background: var(--dawn);
}
.inicio h1 { text-align: center; animation: salir 1.2s var(--ease) both; }
.horizonte {
  position: absolute; left: 50%; top: clamp(24px, 6vh, 60px); width: 100vw; height: 1px; transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--amber) 30%, #E4B76C 50%, var(--amber) 70%, transparent);
  animation: trazar 1.3s var(--ease) both;
}
@keyframes trazar { from { transform: translateX(-50%) scaleX(0); opacity: 0; } }
@keyframes salir { from { transform: translateY(14px); opacity: 0; } }
@keyframes entrar { from { transform: translateX(18px); opacity: 0; } }

.hoja {
  display: grid; gap: 8px; padding: 16px 18px 14px; border-radius: 16px;
  background: var(--sheet); color: var(--sheet-ink); box-shadow: 0 30px 70px -34px rgba(0, 0, 0, .8);
}
.hoja label { font: 600 .74rem/1 var(--label); letter-spacing: .12em; text-transform: uppercase; color: #6A5A3E; }
.hoja textarea {
  width: 100%; min-height: 56px; resize: vertical; border: 0; background: transparent;
  font-size: 1.06rem; line-height: 1.5; color: var(--sheet-ink); padding: 4px 0;
}
.hoja textarea::placeholder { color: #6E6C74; }
.hoja textarea:focus-visible { outline: 0; }
.hoja:focus-within { box-shadow: 0 0 0 3px var(--amber), 0 30px 70px -34px rgba(0, 0, 0, .8); }
.pie { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: .8rem; color: #5E5C64; }

.tarjetas { display: grid; gap: 12px; margin-top: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.tarjeta {
  display: grid; gap: 6px; padding: 18px; border-radius: 14px; background: var(--surface);
  border: 1px solid var(--line); border-top: 2px solid var(--amber);
}
.tarjeta h3 { font: 400 1.25rem/1.2 var(--display); letter-spacing: 0; text-transform: none; color: var(--text); }
.tarjeta p { font-size: .9rem; color: var(--soft); }
.tarjeta button { justify-self: start; margin-top: 8px; }

/* Conversación */
.escena { display: grid; grid-template-columns: minmax(0, 1fr); min-height: calc(100dvh - 110px); }
.escena.con-panel { grid-template-columns: minmax(0, 1fr) minmax(340px, 44%); }
.hilo { width: 100%; max-width: 760px; margin: 0 auto; padding: 20px 16px 32px; display: grid; gap: 16px; align-content: start; }
.volver { justify-self: start; }
.proyecto { color: var(--amber-text); font: 600 .8rem/1 var(--label); letter-spacing: .1em; text-transform: uppercase; margin-top: -8px; }
.resumen { padding: 14px 16px; border-radius: 12px; background: var(--amber-wash); border-left: 3px solid var(--amber); display: grid; gap: 6px; }
.resumen h2 { color: var(--amber-text); }
.resumen p { font-size: .95rem; color: var(--text); }

.mensajes { display: grid; gap: 14px; }
.mensajes li { display: grid; gap: 4px; max-width: 88%; }
.mensajes .tu { justify-self: end; }
.mensajes p { padding: 12px 16px; border-radius: 16px; overflow-wrap: anywhere; }
.tu p { background: var(--user-bg); border-bottom-right-radius: 4px; }
.timo p { background: var(--surface); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.pregunta p { border-color: var(--amber); background: var(--amber-wash); }
.quien { font: 600 .72rem/1 var(--label); letter-spacing: .1em; text-transform: uppercase; color: var(--mute); }
.tu .quien { text-align: right; }
.quien i { font-style: normal; margin-left: 6px; padding: 2px 7px; border-radius: 999px; border: 1px solid var(--line-2); letter-spacing: .04em; text-transform: none; color: var(--soft); }

.atajos { display: flex; flex-wrap: wrap; gap: 8px; }
.atajo { min-height: 44px; font-size: .92rem; text-align: left; border-radius: 12px; padding: 6px 14px; }

/* Creación abierta */
.creacion {
  padding: 16px clamp(16px, 2.4vw, 28px) 32px; background: var(--surface-2); border-left: 1px solid var(--line-2);
  display: grid; gap: 14px; align-content: start; animation: entrar .5s var(--ease) both;
}
.creacion-barra { display: flex; align-items: center; justify-content: space-between; gap: 12px; font: 600 .78rem/1.3 var(--label); letter-spacing: .08em; text-transform: uppercase; color: var(--soft); }
.creacion-barra button { text-transform: none; letter-spacing: 0; font-family: var(--sans); font-size: .92rem; flex: none; }
.lamina {
  --tinta: var(--amber); position: relative; aspect-ratio: 16 / 10; padding: clamp(18px, 3vw, 34px); border-radius: 10px;
  background: var(--sheet); color: var(--sheet-ink); display: grid; align-content: center; gap: 10px; overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .8); transform: rotate(-.6deg);
}
.tinta-terracota { --tinta: #B5532F; } .tinta-oliva { --tinta: #6B7332; } .tinta-azul { --tinta: #2F5D8C; }
.lamina .tipo { font: 600 .74rem/1 var(--label); letter-spacing: .14em; text-transform: uppercase; color: var(--tinta); }
.lamina h2 { font: 400 clamp(1.4rem, 3vw, 2.2rem)/1.1 var(--display); letter-spacing: -.01em; text-transform: none; color: var(--sheet-ink); }
.lamina .nota { font-size: .92rem; color: #55535B; }
.franja { position: absolute; left: 0; right: 0; bottom: 0; height: 10px; background: var(--tinta); }
.lista { display: grid; gap: 6px; font-size: .94rem; color: var(--soft); }
.lista b { color: var(--text); font-weight: 600; margin-right: 6px; }
.lista .actual { color: var(--amber-text); font-weight: 600; }
.pequeno { font-size: .82rem; color: var(--mute); }

@media (max-width: 860px) {
  .barra .suave { font-size: .82rem; padding: 0 12px; }
  .escena.con-panel { grid-template-columns: minmax(0, 1fr); }
  .escena.con-panel .hilo { display: none; }
  .creacion { border-left: 0; min-height: calc(100dvh - 110px); padding-bottom: calc(32px + env(safe-area-inset-bottom)); }
  .pie span { display: none; }
  .pie { justify-content: flex-end; }
  .mensajes li { max-width: 96%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}