@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Work+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-top: #f6f2e9;
  --bg-bottom: #e4ecee;
  --card-bg: #ffffff;
  --ink: #241f1a;
  --ink-soft: #6b6155;
  --accent: #2f6558;
  --accent-light: #7fbfa9;
  --gold: #c98a3d;
  --border: #e6ddcf;
  --back-1: #0c0c0d;
  --back-2: #1c1610;
  --back-line: rgba(255,140,45,0.4);
  --back-orange: #ff8a3d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background-color: var(--bg-bottom);
  font-family: 'Work Sans', sans-serif;
  color: var(--ink);
}

.font-display { font-family: 'Space Grotesk', sans-serif; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

/* ---------- Cabecera con foto de la escuela ---------- */
header.mural-header {
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: flex-end;
  background-image:
    linear-gradient(180deg, rgba(20,26,22,0.35) 0%, rgba(20,26,22,0.15) 40%, rgba(20,26,22,0.82) 100%),
    url('assets/escuela.jpg');
  background-size: cover;
  background-position: center 65%;
}
@media (min-width: 768px) { header.mural-header { min-height: 360px; } }
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 44px 24px 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  position: relative;
  z-index: 2;
}
.header-inner .eyebrow-top {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #e7c98a;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.header-inner .eyebrow-top::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #e7c98a;
  display: inline-block;
}
.header-inner h1 {
  color: #ffffff;
  font-size: clamp(2.1rem, 5.4vw, 3.1rem);
  line-height: 0.98;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
  text-shadow: 0 2px 18px rgba(0,0,0,0.25);
}
.header-inner .subt {
  color: #eef1ea;
  font-size: 13.5px;
  margin-top: 10px;
  opacity: 0.92;
}

/* ---------- Botón / acceso ---------- */
.acceso-wrap { position: relative; z-index: 2; }
.btn-acceso, .btn-salir {
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 11px 20px 11px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn-acceso {
  background: rgba(255,255,255,0.14);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-acceso svg { color: var(--gold); }
.btn-acceso:hover {
  background: rgba(255,255,255,0.22);
  border-color: rgba(231,201,138,0.7);
  transform: translateY(-1px);
}
.btn-salir {
  background: rgba(255,255,255,0.1);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 10px 18px;
}
.btn-salir:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.65); }
.modo-edicion {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}
.staff-bar { display: flex; align-items: center; gap: 10px; }

.login-backdrop { position: fixed; inset: 0; z-index: 40; }
.login-popover {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 50;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 14px;
  padding: 20px;
  width: 254px;
  box-shadow: 0 20px 40px rgba(10,16,14,0.25);
  display: none;
}
.login-popover.abierto { display: block; }
.login-popover p.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 12px;
}
.login-popover input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-bottom: 9px;
  font-size: 13px;
  font-family: 'Work Sans', sans-serif;
  background: #fbf9f5;
}
.login-popover input:focus { outline: none; border-color: var(--accent); background: #fff; }
.login-popover .error { color: #b3432f; font-size: 12px; margin: 0 0 8px; }
.login-popover button[type="submit"] {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s ease;
}
.login-popover button[type="submit"]:hover { background: #244f45; }

/* ---------- Banner de error ---------- */
.banner-error {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px 0;
}
.banner-error .caja {
  background: #fbeee7;
  color: #8a3a25;
  border: 1px solid #ecd2c4;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  display: none;
}
.banner-error .caja.visible { display: block; }

/* ---------- Fondo de la galería ---------- */
main.mural-main {
  min-height: 70vh;
  background: linear-gradient(160deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}
.contenido { max-width: 1200px; margin: 0 auto; padding: 46px 24px 80px; }

.vacio {
  text-align: center;
  padding-top: 70px;
  color: var(--ink-soft);
}

.mural-grid {
  column-count: 1;
  column-gap: 28px;
}
@media (min-width: 640px)  { .mural-grid { column-count: 2; } }
@media (min-width: 1024px) { .mural-grid { column-count: 3; } }
@media (min-width: 1280px) { .mural-grid { column-count: 4; } }

.poster-wrap {
  break-inside: avoid;
  display: inline-block;
  width: 100%;
  margin: 0 0 28px;
  position: relative;
}
.poster-wrap.dragging .flip-scene { opacity: 0.4; }
.poster-wrap.drag-over .flip-scene { outline: 2px dashed var(--gold); outline-offset: 3px; border-radius: 12px; }

/* ---------- Tarjeta con giro 3D ---------- */
.flip-scene {
  perspective: 1400px;
  border-radius: 10px;
  box-shadow: 0 1px 2px rgba(30,25,15,0.06), 0 18px 30px -18px rgba(30,25,15,0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.poster-wrap:hover .flip-scene {
  transform: translateY(-4px);
  box-shadow: 0 1px 2px rgba(30,25,15,0.08), 0 26px 40px -16px rgba(30,25,15,0.4);
}
.flip-card {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(.22,.9,.28,1);
  border-radius: 10px;
}
.flip-card.flipped { transform: rotateY(180deg); }

.flip-front, .flip-back {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 10px;
}
.flip-front {
  position: relative;
  overflow: hidden;
  background: var(--card-bg);
}
.flip-back {
  position: absolute;
  inset: 0;
  transform: rotateY(180deg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 22px 18px;
  background:
    radial-gradient(circle at 20% 15%, rgba(255,138,61,0.14) 0%, transparent 45%),
    linear-gradient(135deg, var(--back-1) 0%, var(--back-2) 100%);
}
.flip-back::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.65;
  background-image:
    radial-gradient(var(--back-line) 1.2px, transparent 1.2px),
    linear-gradient(var(--back-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--back-line) 1px, transparent 1px);
  background-size: 28px 28px, 28px 28px, 28px 28px;
  background-position: 0 0, 0 0, 0 0;
  pointer-events: none;
}
.flip-back .back-chip {
  position: relative;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--back-orange);
  background: rgba(255,138,61,0.12);
  border: 1px solid rgba(255,138,61,0.45);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 14px;
}
.flip-back .back-autores {
  position: relative;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 17px;
  color: #f5efe6;
  line-height: 1.4;
  max-width: 88%;
}
.flip-back .back-node {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,138,61,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
  color: var(--back-orange);
  background: rgba(255,138,61,0.08);
}

.poster-img { width: 100%; display: block; }

.btn-flip {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(20,26,23,0.55);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  z-index: 6;
}
.btn-flip:hover { background: rgba(20,26,23,0.78); border-color: var(--gold); transform: rotate(35deg); }
.flip-back .btn-flip {
  background: rgba(255,138,61,0.12);
  color: var(--back-orange);
  border: 1px solid rgba(255,138,61,0.4);
}
.flip-back .btn-flip:hover { background: rgba(255,138,61,0.22); border-color: var(--back-orange); }

.controles-admin {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  gap: 5px;
  z-index: 6;
}
.controles-admin span, .controles-admin button {
  background: rgba(20,26,23,0.65);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 5px;
  padding: 5px;
  cursor: pointer;
  display: flex;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.controles-admin span:hover, .controles-admin button:hover { border-color: var(--gold); color: var(--gold); }
.controles-admin span { cursor: grab; }

/* ---------- Tarjeta "agregar" ---------- */
.tarjeta-agregar {
  width: 100%;
  box-sizing: border-box;
  background: rgba(255,255,255,0.5);
  border: 1.5px dashed #c9bfa9;
  border-radius: 10px;
  color: var(--ink-soft);
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-height: 160px;
  font-family: 'Work Sans', sans-serif;
  font-size: 13px;
}
.tarjeta-agregar .icono-agregar { color: var(--accent); }
.tarjeta-agregar .input-autores {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 11px;
  border-radius: 7px;
  border: 1px solid var(--border);
  font-size: 12.5px;
  font-family: 'Work Sans', sans-serif;
  background: #fff;
}
.tarjeta-agregar .input-autores:focus { outline: none; border-color: var(--accent); }
.tarjeta-agregar .btn-elegir {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 9px 0;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}
.tarjeta-agregar .btn-elegir:hover { background: #244f45; }
.tarjeta-agregar .btn-elegir:disabled { cursor: wait; opacity: 0.7; }
.tarjeta-agregar .ayuda { font-size: 10.5px; color: #a89f8e; text-align: center; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .flip-card, .flip-scene, .btn-flip { transition: none !important; }
}