:root{
  --bg:#0a0f1e; --bg2:#1b2a4a; --card:rgba(255,255,255,.04); --line:rgba(255,255,255,.09);
  --txt:#fff; --muted:#9fb0cc; --muted2:#7f92b3; --azul:#3b82f6; --azul2:#60a5fa; --err:#ff9a9a;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{min-height:100%;background:var(--bg);color:var(--txt);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}

/* ---- Fondo con degradé ---- */
.fondo{position:fixed;inset:0;z-index:-1;background:radial-gradient(circle at 50% 25%,var(--bg2) 0%,var(--bg) 72%)}

/* ---- Login / pantallas centradas ---- */
.centro{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:28px}
.card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line);
  border-radius:22px;padding:38px 30px;backdrop-filter:blur(10px);
  box-shadow:0 24px 60px rgba(0,0,0,.45);display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.logo{font-size:46px;line-height:1}
.card h1{font-size:clamp(20px,5.2vw,26px);font-weight:700;letter-spacing:-.02em}
.card p{color:var(--muted);font-size:14.5px;line-height:1.5}
.campo{width:100%;margin-top:4px;padding:15px 18px;font-size:18px;text-align:center;
  letter-spacing:.22em;font-weight:600;color:#fff;background:rgba(255,255,255,.06);
  border:1.5px solid var(--line);border-radius:14px;outline:none;transition:border-color .15s}
.campo::placeholder{letter-spacing:normal;font-weight:400;color:var(--muted2)}
.campo:focus{border-color:var(--azul)}
.btn{width:100%;appearance:none;border:0;cursor:pointer;font-weight:600;padding:15px 24px;
  border-radius:14px;font-size:17px;color:#fff;background:var(--azul);
  transition:transform .08s,filter .15s,opacity .15s}
.btn:hover{filter:brightness(1.08)} .btn:active{transform:scale(.98)} .btn:disabled{opacity:.55;cursor:default}
.btn.sec{background:rgba(255,255,255,.08);border:1px solid var(--line)}
.btn.mini{width:auto;padding:9px 16px;font-size:14px;border-radius:10px}
.error{color:var(--err);font-size:13.5px;min-height:18px}
.candado{color:var(--muted2);font-size:12px;display:flex;align-items:center;gap:6px}

/* ---- Header de páginas internas ---- */
.top{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  gap:14px;padding:16px 20px;background:rgba(10,15,30,.75);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .marca{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px}
.top .marca .g{font-size:22px}
.top .acciones{display:flex;gap:10px;align-items:center}

/* ---- Biblioteca (grid de tarjetas) ---- */
.wrap{max-width:1100px;margin:0 auto;padding:26px 20px 60px}
.wrap h2{font-size:22px;font-weight:700;margin-bottom:4px}
.wrap .sub{color:var(--muted);font-size:14px;margin-bottom:24px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.vcard{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:transform .12s,border-color .15s;display:flex;flex-direction:column}
.vcard:hover{transform:translateY(-3px);border-color:rgba(96,165,250,.5)}
.vthumb{aspect-ratio:16/9;position:relative;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#243a63,#141d33)}
.vthumb .play{width:52px;height:52px;border-radius:50%;background:rgba(59,130,246,.92);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff}
.vthumb .badge{position:absolute;top:10px;left:10px;background:rgba(0,0,0,.55);color:#cfe0ff;
  font-size:11px;padding:4px 9px;border-radius:99px;font-weight:600}
.vbody{padding:14px 16px 16px}
.vbody .t{font-weight:600;font-size:15.5px;line-height:1.3}
.vbody .d{color:var(--muted);font-size:13px;margin-top:6px;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vacio{text-align:center;color:var(--muted);padding:60px 20px;border:1px dashed var(--line);border-radius:16px}

/* ---- Admin ---- */
.form-row{width:100%;text-align:left;display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.form-row label{font-size:13px;color:var(--muted)}
.form-row input[type=text],.form-row textarea,.form-row input[type=file]{
  width:100%;padding:12px 14px;background:rgba(255,255,255,.06);border:1px solid var(--line);
  border-radius:10px;color:#fff;font-size:15px;font-family:inherit}
.form-row textarea{min-height:70px;resize:vertical}
.tabla{width:100%;border-collapse:collapse;margin-top:10px;font-size:14px}
.tabla th,.tabla td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line)}
.tabla th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.ok{color:#8fe6a8} .aviso-box{background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.3);
  color:#cfe0ff;padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:16px}