/* Fuente base y reset ligero */
:root{
  --bg: #0b1020;
  --card: #121a33;
  --card-2: #0f1730;
  --accent: #7aa2ff;
  --accent-2: #a0ffe0;
  --text: #e6e9f2;
  --muted: #9aa3b2;
  --radius: 16px;
  --button-size: 96px; /* contenedor */
  --icon-size: 64px;   /* PNGs provistos */
  --shine: rgba(255,255,255,0.65);
  --shadow: rgba(0,0,0,0.35);
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  background: radial-gradient(1200px 800px at 70% -10%, #1d2a59 0%, var(--bg) 40%),
              linear-gradient(180deg, #0a0f1f 0%, #05070e 100%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
}

/* Header */
.site-header{
  padding: 40px 20px 10px;
  text-align: center;
}
.site-header h1{
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
}
.subtitle{
  margin: 8px auto 0;
  color: var(--muted);
  max-width: 720px;
}

/* Container & Grid */
.container{
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 22px;
  margin-top: 10px;
}

/* 3D Icon Button */
.icon-card{
  position: relative;
  padding: 18px 16px 16px;
  border-radius: calc(var(--radius) + 8px);
  background: linear-gradient(180deg, var(--card) 0%, var(--card-2) 100%);
  box-shadow:
    0 4px 12px rgba(0,0,0,0.35),
    inset 0 1px 0 rgba(255,255,255,0.05),
    inset 0 -1px 0 rgba(0,0,0,0.3);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  border: 1px solid rgba(255,255,255,0.06);
}

.icon-card:hover{
  transform: translateY(-2px);
  box-shadow:
    0 12px 28px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.07),
    inset 0 -1px 0 rgba(0,0,0,0.35);
  background: linear-gradient(180deg, #1b2650 0%, #0e1530 100%);
}

.icon-card:active{
  transform: translateY(0);
  box-shadow:
    0 6px 12px rgba(0,0,0,0.45) inset;
}

/* glossy highlight */
.icon-card::before{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(120% 80% at 30% -10%, rgba(255,255,255,0.16) 0%, rgba(255,255,255,0) 60%);
  pointer-events: none;
}

/* Inner button surface */
.icon-btn{
  position: relative;
  width: 100%;
  height: var(--button-size);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.02) 60%),
    linear-gradient(180deg, #15224a 0%, #0a1333 100%);
  box-shadow:
    inset 0 2px 8px rgba(255,255,255,0.08),
    inset 0 -6px 14px rgba(0,0,0,0.55),
    0 12px 24px rgba(0,0,0,0.35);
  display: grid;
  place-items: center;
  overflow: hidden;
  transition: transform .15s ease;
  border: 1px solid rgba(255,255,255,0.06);
}

.icon-card:hover .icon-btn{
  transform: translateY(-1px);
}

/* subtle shine stripe */
.icon-btn::after{
  content:"";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 160%;
  height: 120%;
  background: linear-gradient( 60deg, rgba(255,255,255,0.0) 40%, rgba(255,255,255,0.10) 50%, rgba(255,255,255,0.0) 60%);
  transform: translateY(0) rotate(8deg);
  pointer-events: none;
}

/* the icon image itself */
.icon{
  width: var(--icon-size);
  height: var(--icon-size);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  transition: transform .18s ease, filter .18s ease, background-image .18s ease;
  filter: drop-shadow(0 4px 4px rgba(0,0,0,0.35));
}

/* label */
.icon-label{
  margin-top: 14px;
  font-weight: 600;
  text-align: center;
  letter-spacing: .2px;
  line-height: 1.2;
}

/* hover state: show download icon instead of original */
.icon-card:hover .icon{
  transform: translateY(-2px) scale(1.03);
}

/* Focus ring for keyboard a11y */
.icon-card:focus-within{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(122,162,255,0.25), 0 16px 30px rgba(0,0,0,0.55);
}

/* Small helper chips/badges (optional) */
.chips{
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.chip{
  font-size: 12px;
  color: #d4defc;
  background: rgba(122,162,255,0.12);
  border: 1px solid rgba(122,162,255,0.25);
  padding: 6px 8px;
  border-radius: 999px;
}

/* Footer */
.site-footer{
  max-width: 1100px;
  margin: 24px auto 48px;
  padding: 0 24px;
  color: var(--muted);
}
.site-footer .tips{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(160,255,224,0.08);
  border: 1px solid rgba(160,255,224,0.25);
  padding: 10px 14px;
  border-radius: 12px;
}
.dot{
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 10px var(--accent-2);
}

/* Utility: state when hovering shows download glyph */
.icon[data-hover='download']:hover{
  background-image: var(--download-glyph) !important;
  filter: drop-shadow(0 6px 8px rgba(0,0,0,0.45));
}