/* Frutiger Aero · Windows 7 — versión detallada (brillos, reflejos, sombras) */
:root{--ink:#10304d;--blue:#2b8be0;--blue-d:#0f5a99;--green:#4cc23a;--green-d:#23851a}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);line-height:1.55;min-height:100vh;
  font-family:"Segoe UI","Frutiger","Trebuchet MS",Verdana,sans-serif;
  background:linear-gradient(180deg,#1f7fd6 0,#4fb0f4 22%,#9bdcff 52%,#d9f4ff 78%,#bff0a2 100%) fixed}
a{color:var(--blue-d)}
h1,h2,h3{margin:0 0 .4em}
h3{font-size:1.02rem;color:var(--blue-d);text-shadow:0 1px 0 #fff}
p{margin:.4em 0 .8em}

/* ---------- cielo: rayos, nubes, burbujas y colinas ---------- */
.sky{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.sky::before{content:"";position:absolute;inset:-20% -10% 25%;
  background:conic-gradient(from 160deg at 50% 0,transparent 0 4deg,rgba(255,255,255,.3) 6deg,transparent 12deg,rgba(255,255,255,.2) 16deg,transparent 22deg,rgba(255,255,255,.28) 26deg,transparent 34deg,rgba(255,255,255,.18) 38deg,transparent 46deg,rgba(255,255,255,.24) 50deg,transparent 58deg);
  -webkit-mask-image:linear-gradient(#000,transparent 85%);mask-image:linear-gradient(#000,transparent 85%)}
.sky::after{content:"";position:absolute;left:0;right:0;top:0;height:50%;
  background:radial-gradient(ellipse 18% 9% at 15% 24%,rgba(255,255,255,.8),transparent 70%),radial-gradient(ellipse 24% 10% at 62% 12%,rgba(255,255,255,.75),transparent 70%),radial-gradient(ellipse 16% 8% at 90% 32%,rgba(255,255,255,.65),transparent 70%)}
.b{position:absolute;border-radius:50%;z-index:1;border:1px solid rgba(255,255,255,.8);
  background:radial-gradient(circle at 30% 24%,#fff 0,rgba(255,255,255,.9) 5%,rgba(255,255,255,.28) 16%,rgba(255,255,255,.05) 55%,rgba(110,200,255,.42) 100%);
  box-shadow:inset 0 -10px 18px rgba(60,160,255,.38),inset 0 6px 10px rgba(255,255,255,.6),0 6px 18px rgba(0,90,170,.28);
  animation:float 14s ease-in-out infinite}
.b1{width:130px;height:130px;left:5%;top:16%}
.b2{width:64px;height:64px;left:88%;top:12%;animation-delay:-4s}
.b3{width:90px;height:90px;left:80%;top:56%;animation-delay:-8s}
.b4{width:46px;height:46px;left:12%;top:68%;animation-delay:-2s}
.b5{width:28px;height:28px;left:46%;top:8%;animation-delay:-6s}
@keyframes float{50%{transform:translateY(-20px)}}
.hill{position:absolute;border-radius:50%;box-shadow:inset 0 10px 22px rgba(255,255,255,.55)}
.h1{left:-15%;width:75%;bottom:-170px;height:270px;background:radial-gradient(ellipse at 50% 0,#d4ffa6 0,#6fd64e 34%,#2f9a22 100%)}
.h2{left:35%;width:85%;bottom:-200px;height:270px;background:radial-gradient(ellipse at 50% 0,#b8f58a 0,#4cc23a 38%,#1f7a15 100%)}

/* ---------- barra de tareas ---------- */
.taskbar{position:sticky;top:0;z-index:30;display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:8px 14px;
  background:linear-gradient(180deg,rgba(255,255,255,.8) 0,rgba(180,222,252,.7) 48%,rgba(80,165,235,.7) 52%,rgba(150,212,255,.8) 100%);
  border-bottom:1px solid rgba(10,60,120,.7);backdrop-filter:blur(12px) saturate(1.4);
  box-shadow:inset 0 1px 0 #fff,0 4px 16px rgba(0,60,120,.4)}
.orb{position:relative;display:block;flex:none;width:44px;height:44px;margin:-4px 8px -4px 0;border-radius:50%;
  background:radial-gradient(circle at 50% 120%,#c6ff9c 0,#4cc23a 40%,#1f7a15 78%);border:2px solid rgba(255,255,255,.95);
  box-shadow:0 0 14px rgba(110,240,80,.95),0 3px 8px rgba(0,50,0,.5),inset 0 -8px 12px rgba(0,90,0,.35)}
.orb::before{content:"";position:absolute;left:12%;right:12%;top:4%;height:48%;border-radius:50%/65% 65% 35% 35%;
  background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(255,255,255,.08))}
.orb::after{content:"⌂";position:absolute;inset:0;display:grid;place-items:center;padding-top:8px;color:#fff;font-size:1.15rem;text-shadow:0 1px 3px rgba(0,70,0,.9)}
.btn,.taskbar a:not(.orb){position:relative;display:inline-block;text-decoration:none;color:var(--ink);font-size:.86rem;padding:6px 12px;border-radius:6px;
  border:1px solid rgba(15,60,110,.65);
  background:linear-gradient(180deg,rgba(255,255,255,.85) 0,rgba(255,255,255,.2) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#e6f4fe,#a9d6f5);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.85),0 1px 3px rgba(0,50,100,.45);text-shadow:0 1px 0 rgba(255,255,255,.8);
  transition:box-shadow .2s,filter .2s}
.btn:hover,.taskbar a:not(.orb):hover{filter:saturate(1.3);box-shadow:inset 0 0 0 1px #fff,0 0 12px 2px rgba(70,205,255,.95)}
.taskbar a[aria-current]{background:linear-gradient(180deg,rgba(255,255,255,.55) 0,rgba(255,255,255,.1) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#8ccdf5,#4aa6e8);
  box-shadow:inset 0 2px 5px rgba(0,60,120,.55),0 0 10px rgba(80,210,255,.9);font-weight:600}
.btn:focus-visible,.taskbar a:focus-visible,summary:focus-visible,.tile:focus-visible{outline:3px solid #ffb400;outline-offset:2px}

/* ---------- estructura ---------- */
main{max-width:1040px;margin:0 auto;padding:26px 16px 90px}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:14px 0}
.chips.left{justify-content:flex-start;margin:0 0 14px}
.chip{position:relative;padding:3px 13px;border-radius:99px;font-size:.8rem;font-weight:600;color:#fff;border:1px solid #1f6f17;
  text-shadow:0 1px 1px rgba(0,60,0,.7);
  background:linear-gradient(180deg,rgba(255,255,255,.6) 0,rgba(255,255,255,.1) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#6fd65a,#238a19);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.35),0 2px 5px rgba(0,60,0,.4)}
.chip.b{border-color:#0d4a80;text-shadow:0 1px 1px rgba(0,30,70,.7);background:linear-gradient(180deg,rgba(255,255,255,.6) 0,rgba(255,255,255,.1) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#5fb4f5,#0f5a99)}
.chip.r{border-color:#7d1c0e;text-shadow:0 1px 1px rgba(80,10,0,.7);background:linear-gradient(180deg,rgba(255,255,255,.6) 0,rgba(255,255,255,.1) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#f58a74,#b02b18)}

/* ---------- portada ---------- */
.hero{position:relative;text-align:center;padding:50px 20px 38px;margin-bottom:44px;border-radius:16px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.85) 0,rgba(255,255,255,.4) 48%,rgba(210,238,255,.35) 49%,rgba(255,255,255,.6) 100%);
  border:1px solid #fff;box-shadow:0 0 0 1px rgba(15,80,140,.5),0 14px 40px rgba(0,70,130,.4),inset 0 0 40px rgba(255,255,255,.85);
  backdrop-filter:blur(10px)}
.hero h1{font-size:clamp(2.2rem,6vw,3.6rem);font-weight:300;letter-spacing:-1px;color:#0d4f8a;
  text-shadow:0 0 14px #fff,0 2px 0 #fff,0 6px 14px rgba(0,90,170,.35);-webkit-box-reflect:below -4px linear-gradient(transparent 55%,rgba(255,255,255,.55))}
.hero p{max-width:60ch;margin:.5em auto}
.tiles{display:grid;gap:44px 20px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));margin-bottom:60px}
.tile{position:relative;display:block;padding:16px 16px 14px;text-decoration:none;color:var(--ink);border-radius:12px;
  border:1px solid rgba(255,255,255,.95);
  background:linear-gradient(180deg,rgba(255,255,255,.9) 0,rgba(255,255,255,.4) 48%,rgba(205,234,252,.45) 49%,rgba(235,248,255,.7) 100%);
  box-shadow:0 0 0 1px rgba(15,80,140,.45),0 8px 20px rgba(0,60,120,.35),inset 0 1px 0 #fff;backdrop-filter:blur(8px);
  -webkit-box-reflect:below 3px linear-gradient(transparent 68%,rgba(255,255,255,.3));transition:transform .2s,box-shadow .2s}
.tile:hover{transform:translateY(-4px);box-shadow:0 0 0 1px rgba(15,80,140,.5),0 0 22px 4px rgba(90,210,255,.85),0 12px 24px rgba(0,60,120,.4),inset 0 1px 0 #fff}
.tile b{display:block;font-size:1.02rem;margin:8px 0 2px;color:#0d4f8a;text-shadow:0 1px 0 #fff}
.tile span.d{font-size:.88rem}
.gem{position:relative;display:grid;place-items:center;width:56px;height:56px;border-radius:50%;font-size:1.6rem;border:2px solid #fff;
  background:radial-gradient(circle at 50% 118%,#a8e4ff 0,#2b8be0 55%,#0f5a99 100%);
  box-shadow:0 0 12px rgba(60,175,255,.85),0 3px 7px rgba(0,50,100,.45),inset 0 -6px 10px rgba(0,60,130,.45)}
.gem::before{content:"";position:absolute;left:10%;right:10%;top:3%;height:50%;border-radius:50%/65% 65% 35% 35%;background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,.05))}
.gem>span{position:relative;z-index:1;filter:drop-shadow(0 1px 2px rgba(0,40,90,.6))}

/* ---------- ventana Aero ---------- */
.win{position:relative;margin:0 0 26px;border-radius:10px;overflow:hidden;border:1px solid rgba(10,50,90,.75);
  background:linear-gradient(160deg,rgba(255,255,255,.74) 0,rgba(225,243,255,.52) 45%,rgba(190,228,255,.45) 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.8),0 14px 34px rgba(0,50,100,.45),0 2px 4px rgba(0,40,90,.4);
  backdrop-filter:blur(12px) saturate(1.4)}
.win::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(118deg,rgba(255,255,255,.55) 0,rgba(255,255,255,.2) 26%,transparent 27%,transparent 62%,rgba(255,255,255,.16) 63%,transparent 82%)}
.win>*{position:relative}
.win>header{display:flex;gap:10px;align-items:center;padding:8px 0 8px 12px;
  background:linear-gradient(180deg,rgba(255,255,255,.9) 0,rgba(175,218,250,.8) 46%,rgba(70,160,235,.88) 50%,rgba(135,208,252,.88) 100%);
  border-bottom:1px solid rgba(10,60,120,.7);box-shadow:inset 0 1px 0 #fff}
.win>header h2{margin:0;font-size:1.08rem;font-weight:600;color:#0b2540;text-shadow:0 0 8px #fff,0 0 4px #fff,0 0 2px #fff}
.ico{font-size:1.25rem;filter:drop-shadow(0 1px 2px rgba(0,50,100,.5))}
.ctl{margin:-8px 8px 0 auto;align-self:flex-start;display:flex;border:1px solid rgba(10,40,80,.75);border-top:0;border-radius:0 0 6px 6px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.6),0 2px 4px rgba(0,40,90,.35)}
.ctl i{display:grid;place-items:center;width:30px;height:20px;font-style:normal;font-size:11px;color:#17406a;text-shadow:0 1px 0 #fff;border-right:1px solid rgba(10,40,80,.4);
  background:linear-gradient(180deg,rgba(255,255,255,.95) 0,#d3e8f8 48%,#9ac9ee 52%,#d6f0ff 100%)}
.ctl i:nth-child(1)::before{content:"–"}.ctl i:nth-child(2)::before{content:"□"}
.ctl i:last-child{width:44px;border-right:0;color:#fff;text-shadow:0 0 4px rgba(90,0,0,.95);background:linear-gradient(180deg,#fbcfc3 0,#e8715a 48%,#c42f17 52%,#f4927c 100%);box-shadow:0 0 8px rgba(255,90,60,.7)}
.ctl i:last-child::before{content:"✕"}
.body{padding:18px 20px 10px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));margin-bottom:12px}
.card{padding:12px 14px;border-radius:9px;border:1px solid rgba(255,255,255,.95);
  background:linear-gradient(180deg,rgba(255,255,255,.85) 0,rgba(255,255,255,.3) 44%,rgba(255,255,255,0) 45%),linear-gradient(180deg,rgba(238,249,255,.85),rgba(205,232,252,.8));
  box-shadow:0 0 0 1px rgba(20,90,150,.35),0 5px 12px rgba(0,60,110,.28),inset 0 1px 0 #fff}
ul{padding-left:1.2em;margin:.3em 0 .6em}
li{margin:.15em 0}
.tip{margin:14px 0;padding:10px 14px;border-radius:9px;border:1px solid #6cc25a;
  background:linear-gradient(180deg,rgba(255,255,255,.7) 0,rgba(255,255,255,.12) 48%,rgba(255,255,255,0) 49%),linear-gradient(180deg,#e2ffd0,#b3e993);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.7),0 3px 8px rgba(30,110,20,.3)}
.tip b{color:var(--green-d)}
.warn{border-color:#e8a540;background:linear-gradient(180deg,rgba(255,255,255,.7) 0,rgba(255,255,255,.12) 48%,rgba(255,255,255,0) 49%),linear-gradient(180deg,#fff6dc,#fbd98f);box-shadow:inset 0 0 0 1px rgba(255,255,255,.7),0 3px 8px rgba(150,90,0,.3)}
.warn b{color:#a35f00}

/* ---------- tablas, código, detalles ---------- */
.scroll{overflow-x:auto;margin:10px 0 14px;border-radius:7px;border:1px solid rgba(15,80,140,.55);box-shadow:0 4px 10px rgba(0,60,110,.25)}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:.9rem;background:rgba(255,255,255,.78)}
th{color:#fff;text-align:left;padding:7px 10px;text-shadow:0 1px 1px rgba(0,40,90,.7);border:1px solid #14609e;
  background:linear-gradient(180deg,rgba(255,255,255,.55) 0,rgba(255,255,255,.1) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#5fb4f5,#1b6fb8)}
td{padding:6px 10px;border:1px solid rgba(20,96,158,.22)}
tr:nth-child(even) td{background:rgba(190,228,255,.5)}
tfoot td{font-weight:700;background:rgba(160,235,140,.6)!important}
code,pre{font-family:Consolas,"Courier New",monospace}
pre{position:relative;margin:8px 0;padding:12px 14px;border-radius:8px;overflow-x:auto;font-size:.82rem;color:#c9f0ff;border:1px solid #fff;
  background:linear-gradient(180deg,rgba(255,255,255,.14) 0,rgba(255,255,255,0) 40%),#10233a;box-shadow:inset 0 0 14px rgba(0,0,0,.65),0 3px 8px rgba(0,40,90,.4)}
.formula{font-family:Consolas,monospace;padding:2px 8px;border-radius:5px;background:rgba(255,255,255,.85);border:1px solid rgba(20,96,158,.35);box-shadow:inset 0 1px 2px rgba(0,60,110,.2)}
.big{font-size:1.7rem;font-weight:300;color:var(--green-d);text-shadow:0 1px 0 #fff,0 0 10px rgba(255,255,255,.9)}
details{margin:9px 0;border-radius:8px;border:1px solid rgba(20,96,158,.4);background:rgba(255,255,255,.65);box-shadow:0 2px 6px rgba(0,60,110,.18)}
summary{cursor:pointer;padding:8px 12px;font-weight:600;color:var(--blue-d);border-radius:7px;
  background:linear-gradient(180deg,rgba(255,255,255,.9) 0,rgba(255,255,255,.2) 50%,rgba(255,255,255,0) 51%),linear-gradient(180deg,#e4f3fe,#b9dcf6)}
details[open] summary{border-bottom:1px solid rgba(20,96,158,.35);border-radius:7px 7px 0 0}
details>div{padding:8px 14px}

.pager{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:4px}
.pager .btn{padding:8px 18px;font-size:.92rem}
footer{text-align:center;padding:10px 10px 50px;font-size:.85rem;color:#0d3a63;text-shadow:0 1px 0 #fff}

@media (max-width:640px){
  .taskbar{flex-wrap:nowrap;overflow-x:auto}.taskbar a:not(.orb){flex:none;white-space:nowrap}
  .body{padding:14px 12px 4px}.tiles{gap:40px 14px}
}
@media (prefers-reduced-motion:reduce){.b{animation:none}*{transition:none!important;scroll-behavior:auto!important}}