/* ═══════════════════════════════════════════════════════════
   NEXUS.CSS — Sistema de diseño completo v5
   Todos los dashboards: admin, profesor, alumno, index
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=JetBrains+Mono:wght@400;700&family=Rajdhani:wght@400;600;700&display=swap');

/* ── TEMA OSCURO (default) ─────────────────────────────── */
:root,[data-theme="dark"]{
  --bg:#0a1628;--bg-body:#0d1e35;--bg2:#122040;--bg3:#162850;
  --bg-card:#0f1e38;--bg-row:rgba(0,200,255,.04);
  --surface:#122040;--surface2:#162850;--hull:#0a1628;
  --void:#060c18;--glass:rgba(10,22,40,.88);--card:#0f1e38;

  --text:#e0f0ff;--text-body:#cce0f5;--text-primary:#e8f4ff;
  --text-secondary:#8aaac8;--text-muted:#4a6a8a;--text-soft:#6a8aaa;
  --text2:#8aaac8;--text3:#5a7a9a;--sub:#4a6a8a;
  --c0:#e0f0ff;--c2:#8aaac8;--c3:#4a6a8a;
  --surf:#0d1a2e;--surf2:#111f38;

  --border:rgba(0,168,255,.14);--border2:rgba(0,168,255,.10);
  --border-bright:rgba(0,212,255,.35);--border-c:rgba(0,212,255,.25);

  --primary:#00a8ff;--primary2:#0088dd;--pri:#00a8ff;
  --accent:#9460c0;--accent2:#b080e0;--acc:#9460c0;
  --cyan:#00d4ff;--cyan2:#00eeff;--cyan-dim:rgba(0,212,255,.08);
  --ok:#00f07a;--ok-dim:rgba(0,240,122,.08);
  --warn:#ffd040;--warn-dim:rgba(255,208,64,.08);
  --danger:#ff3050;--danger-dim:rgba(255,48,80,.08);
  --red:#c0404a;--green:#00c070;--yellow:#c49a30;
  --purple:#9460c0;--purple2:#c084fc;--pink:#f472b6;
  --gold:#ffd040;--mint:#00e5a0;--mint-dim:rgba(0,229,160,.08);
  --plasma:#b060ff;--plasma-dim:rgba(176,96,255,.08);
  --success:#00c878;--p:#00a8ff;--pd:rgba(0,168,255,.08);

  --grad:linear-gradient(135deg,#00a8ff,#9460c0);
  --grad2:linear-gradient(135deg,#00d4ff,#00eeff);
  --grad-ok:linear-gradient(135deg,#00c878,#00f07a);
  --grad-warn:linear-gradient(135deg,#c49a30,#ffd040);
  --grad-red:linear-gradient(135deg,#c0404a,#ff3050);

  --sh:0 4px 24px rgba(0,0,0,.5);--sh2:0 8px 40px rgba(0,0,0,.6);
  --shadow-cyan:0 0 20px rgba(0,212,255,.25);
  --glow:0 0 20px rgba(0,168,255,.3);--glow2:0 0 40px rgba(0,168,255,.2);

  --r:8px;--r2:12px;--r-lg:16px;--radius:10px;--radius2:14px;

  --font:'Rajdhani',sans-serif;--font-body:'Rajdhani',sans-serif;
  --font-display:'Orbitron',sans-serif;--font-mono:'JetBrains Mono',monospace;
  --mono:'JetBrains Mono',monospace;--display:'Orbitron',sans-serif;
}

/* ── TEMA CLARO ─────────────────────────────────────────── */
[data-theme="light"]{
  --bg:#f0f4f8;--bg-body:#f5f8fc;--bg2:#e8eef6;--bg3:#dde6f0;
  --bg-card:#ffffff;--bg-row:rgba(0,0,0,.03);
  --surface:#ffffff;--surface2:#f0f4f8;--hull:#e8eef6;
  --void:#d8e2ee;--glass:rgba(255,255,255,.9);--card:#ffffff;
  --text:#0a1628;--text-body:#1a2840;--text-primary:#0a1628;
  --text-secondary:#3a5068;--text-muted:#6a8090;--text-soft:#8a9aaa;
  --text2:#3a5068;--text3:#6a8090;--sub:#8a9aaa;
  --c0:#0a1628;--c2:#3a5068;--c3:#6a8090;
  --surf:#ffffff;--surf2:#f0f4f8;
  --border:rgba(0,80,160,.15);--border2:rgba(0,80,160,.10);
  --border-bright:rgba(0,120,220,.4);--border-c:rgba(0,120,220,.3);
  --primary:#0070cc;--primary2:#0055aa;--pri:#0070cc;
  --accent:#7040a0;--acc:#7040a0;
  --cyan:#0090cc;--cyan2:#00aaee;--cyan-dim:rgba(0,144,204,.08);
  --ok:#00a050;--ok-dim:rgba(0,160,80,.08);
  --warn:#cc8800;--warn-dim:rgba(204,136,0,.08);
  --danger:#cc2030;--danger-dim:rgba(204,32,48,.08);
  --red:#aa2020;--green:#007040;--yellow:#996600;
  --purple:#7040a0;--gold:#cc8800;--mint:#008060;--mint-dim:rgba(0,128,96,.08);
  --plasma:#8040cc;--plasma-dim:rgba(128,64,204,.08);
  --sh:0 2px 12px rgba(0,0,0,.12);--sh2:0 4px 24px rgba(0,0,0,.16);
  --shadow-cyan:0 0 16px rgba(0,120,220,.2);
  --glow:0 0 16px rgba(0,112,204,.2);--glow2:0 0 30px rgba(0,112,204,.15);
}

/* ── RESET ──────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg-body);color:var(--text-body);font-size:16px;line-height:1.6;min-height:100vh}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--cyan2)}
img{max-width:100%}

/* ── SCAN EFFECT ────────────────────────────────────────── */
.scan-effect{position:fixed;inset:0;pointer-events:none;z-index:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,168,255,.015) 2px,rgba(0,168,255,.015) 4px)}
body>*:not(.scan-effect){position:relative;z-index:1}

/* ── NAVBAR ─────────────────────────────────────────────── */
.navbar{position:sticky;top:0;z-index:100;background:rgba(6,11,20,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:0 24px;height:56px;display:flex;align-items:center}
.nav-inner,.a-nav-inner{max-width:1400px;width:100%;margin:0 auto;display:flex;align-items:center;gap:14px}
.nav-logo,.a-nav-logo{font-family:var(--font-display);font-size:15px;font-weight:900;letter-spacing:.14em;color:var(--cyan);display:flex;align-items:center;gap:8px;text-transform:uppercase}
.nav-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pdot 2s ease-in-out infinite}
@keyframes pdot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.nav-right,.a-nav-right{margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.nav-badge{font-family:var(--font-mono);font-size:12px;color:var(--text-muted);background:var(--bg2);border:1px solid var(--border);padding:4px 12px;border-radius:6px}
.a-nav-page{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);background:var(--bg2);border:1px solid var(--border);padding:4px 12px;border-radius:6px}
.a-nav-sep{width:1px;height:20px;background:var(--border)}
.nav-links,.nav-lec,.nav-tabs,.nav-search{display:flex;align-items:center;gap:6px}
.nav-search input{padding:7px 12px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);color:var(--text-body);font-size:13px;width:200px;outline:none}
.nav-search-icon{color:var(--text-muted);font-size:16px}

/* ── BOTONES ─────────────────────────────────────────────── */
.btn,.a-btn,.xbtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:9px 18px;border-radius:var(--r);border:1.5px solid var(--border);background:var(--bg2);color:var(--text-body);cursor:pointer;transition:all .2s;text-decoration:none;white-space:nowrap}
.btn:hover,.a-btn:hover,.xbtn:hover{border-color:var(--border-bright);color:var(--cyan);background:var(--cyan-dim)}
.btn-sm,.a-btn-sm,.xbtn-sm{padding:6px 13px;font-size:11px}

.btn-primary,.xbtn-primary,.a-btn-primary{background:var(--primary);border-color:var(--primary);color:#000;font-weight:900}
.btn-primary:hover,.xbtn-primary:hover,.a-btn-primary:hover{background:var(--cyan);border-color:var(--cyan);color:#000}
.btn-warn,.btn-gold{background:var(--warn);border-color:var(--warn);color:#000;font-weight:900}
.btn-warn:hover,.btn-gold:hover{background:#ffe060;border-color:#ffe060;color:#000}
.btn-danger,.btn-red,.a-btn-red,.xbtn-red{background:rgba(255,48,80,.1);border-color:rgba(255,48,80,.4);color:var(--danger)}
.btn-danger:hover,.btn-red:hover,.a-btn-red:hover,.xbtn-red:hover{background:var(--danger);color:#fff}
.btn-ok,.btn-success,.btn-green,.xbtn-ok{background:var(--ok-dim);border-color:rgba(0,240,122,.35);color:var(--ok)}
.btn-ok:hover,.btn-success:hover,.btn-green:hover,.xbtn-ok:hover{background:var(--ok);color:#000}
.btn-cyan{background:var(--cyan-dim);border-color:var(--border-bright);color:var(--cyan)}
.btn-cyan:hover{background:var(--cyan);color:#000}
.btn-secondary,.btn-outline{background:transparent;border-color:var(--border);color:var(--text-secondary)}
.btn-secondary:hover,.btn-outline:hover{border-color:var(--border-bright);color:var(--text-body)}
.btn-purple,.xbtn-primary.purple{background:rgba(148,96,192,.12);border-color:rgba(148,96,192,.35);color:var(--purple)}
.btn-purple:hover{background:var(--purple);color:#fff}
.xbtn-warn{background:var(--warn-dim);border-color:rgba(255,208,64,.35);color:var(--warn)}
.xbtn-warn:hover{background:var(--warn);color:#000}
.xbtn-ghost,.a-btn-ghost{background:transparent;border-color:transparent;color:var(--text-muted)}
.xbtn-ghost:hover,.a-btn-ghost:hover{background:var(--bg2);border-color:var(--border);color:var(--text-body)}
.btn-full,.xbtn-full{width:100%}
.btn-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.btn-submit{width:100%;padding:14px;background:var(--grad);border:none;border-radius:var(--r);color:#fff;font-family:var(--font-display);font-size:15px;font-weight:900;letter-spacing:.08em;cursor:pointer;transition:all .2s}
.btn-submit:hover{opacity:.9;transform:translateY(-1px)}
.alerta-btn{display:inline-block;padding:10px 22px;background:var(--grad-ok);border-radius:var(--r);color:#000;font-weight:700;font-family:var(--font-display);font-size:13px;text-decoration:none;transition:all .2s}
.alerta-btn:hover{opacity:.9;transform:translateY(-1px)}
.fbtn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--r);border:1.5px solid var(--border);background:var(--bg2);color:var(--text-body);cursor:pointer;font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.06em;transition:all .2s}
.fbtn-go{background:var(--primary);border-color:var(--primary);color:#000}
.fbtn-clr{background:transparent;border-color:var(--border);color:var(--text-muted)}

/* ── BADGES ──────────────────────────────────────────────── */
.badge{display:inline-flex;align-items:center;gap:4px;font-family:var(--font-mono);font-size:11px;font-weight:700;padding:3px 10px;border-radius:5px;border:1px solid;text-transform:uppercase;letter-spacing:.06em}
.badge-ok,.badge-pub{border-color:rgba(0,240,122,.35);color:var(--ok);background:var(--ok-dim)}
.badge-warn{border-color:rgba(255,208,64,.35);color:var(--warn);background:var(--warn-dim)}
.badge-danger,.badge-red{border-color:rgba(255,48,80,.35);color:var(--danger);background:var(--danger-dim)}
.badge-cyan{border-color:rgba(0,212,255,.35);color:var(--cyan);background:var(--cyan-dim)}
.badge-muted,.badge-bor{border-color:var(--border);color:var(--text-muted);background:var(--bg2)}
.badge-on{border-color:rgba(0,240,122,.35);color:var(--ok);background:var(--ok-dim)}
.badge-off{border-color:var(--border);color:var(--text-muted);background:var(--bg2)}
.badge-free{border-color:rgba(0,240,122,.35);color:var(--ok);background:var(--ok-dim)}
.badge-pago,.badge-inscripto{border-color:rgba(0,212,255,.35);color:var(--cyan);background:var(--cyan-dim)}
.badge-video,.badge-texto,.badge-img,.badge-preg{border-color:var(--border2);color:var(--text-muted);background:var(--bg2);font-size:10px}
.badge-n,.bor-badge,.lec-num-badge,.sys-badge,.mant-badge,.meta-badge,.tipo-badge,.ca-tipo-badge,.formato-badge,.pub-badge,.pro-badge,.star-badge,.estado-badge,.a-badge{display:inline-flex;align-items:center;gap:3px;font-family:var(--font-mono);font-size:10px;font-weight:700;padding:2px 9px;border-radius:4px;border:1px solid var(--border);color:var(--text-muted);background:var(--bg2);text-transform:uppercase;letter-spacing:.06em}
.rol-badge{border-color:rgba(0,212,255,.35);color:var(--cyan);background:var(--cyan-dim)}
.cmd-badge{position:absolute;top:12px;right:12px;background:var(--red);color:#fff;font-family:var(--font-mono);font-size:10px;font-weight:700;padding:2px 7px;border-radius:20px}
.cupon-descuento-badge{font-family:var(--font-display);font-size:22px;font-weight:900;color:var(--warn)}
.saldo-badge{font-family:var(--font-display);font-size:28px;font-weight:900;color:var(--cyan)}
.thumb-badges,.r-badges,.bloque-badges,.a-alert-chips{display:flex;gap:4px;flex-wrap:wrap}
.camp-stat{font-family:var(--font-mono);font-size:11px;font-weight:700;padding:3px 10px;border-radius:4px;border:1px solid var(--border);color:var(--text-muted);background:var(--bg2)}
.nav-badge.a-badge{font-size:12px;padding:4px 12px}

/* ── STATS ───────────────────────────────────────────────── */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.stat-box{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r2);padding:18px 20px;transition:all .2s;position:relative;overflow:hidden}
.stat-box::after{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:opacity .3s}
.stat-box:hover{border-color:var(--border-bright)}
.stat-box:hover::after{opacity:1}
.stat-box.ok{border-color:rgba(0,240,122,.2)}.stat-box.warn{border-color:rgba(255,208,64,.2)}.stat-box.cyan{border-color:rgba(0,212,255,.2)}.stat-box.plasma{border-color:rgba(176,96,255,.2)}
.stat-n,.stat-num{font-family:var(--font-display);font-size:32px;font-weight:900;color:var(--cyan);line-height:1;margin-bottom:6px}
.stat-box.ok .stat-n{color:var(--ok)}.stat-box.warn .stat-n{color:var(--warn)}.stat-box.plasma .stat-n{color:var(--plasma)}
.stat-l,.stat-label{font-family:var(--font-mono);font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted)}
.stats,.stats-row,.stats-bar,.stats-inner,.hero-stats,.camp-stats,.cli-stats,.a-stats{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.a-stat{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:12px 16px;flex:1;min-width:100px}
.a-stat-n{font-family:var(--font-display);font-size:24px;font-weight:900;color:var(--cyan)}
.a-stat-l{font-family:var(--font-mono);font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}
.stat,.mini-stat,.stat-chip,.hstat{display:inline-flex;flex-direction:column;align-items:center;gap:2px}
.stat-row{display:flex;gap:12px;flex-wrap:wrap}

/* ── CARDS ───────────────────────────────────────────────── */
.card,.nx-card,.pct-card,.progreso-card,.resumen-card,.side-card,.saldo-card,.form-card,.a-form-card,.com-card,.pend-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r2);padding:20px}
.card-header{font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.card-body{padding:16px 0}
.ccard{background:var(--surface);border:1.5px solid var(--border2);border-radius:var(--r2);overflow:hidden;transition:all .25s;box-shadow:var(--sh)}
.ccard:hover{border-color:var(--border-bright);transform:translateY(-3px);box-shadow:var(--sh2)}
.ccard-top{position:relative;overflow:hidden}
.ccard-b{padding:16px}
.ccard-meta{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0;align-items:center}
.ccard-desc{font-size:14px;color:var(--text-muted);margin:6px 0}
.ccard-acts{display:flex;gap:6px;flex-wrap:wrap;padding:12px 16px;border-top:1px solid var(--border)}
.cmd-card{background:var(--surface);border:1.5px solid var(--border2);border-radius:var(--r2);padding:22px 20px;text-decoration:none;display:flex;flex-direction:column;gap:14px;transition:all .25s;position:relative;overflow:hidden;color:var(--text-body)}
.cmd-card::after{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:0;transition:opacity .3s}
.cmd-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:var(--sh2)}
.cmd-card:hover::after{opacity:1}
.cmd-card.ok::after{background:var(--grad-ok)}.cmd-card.warn::after{background:var(--grad-warn)}.cmd-card.red::after{background:var(--grad-red)}.cmd-card.cyan::after{background:var(--grad2)}
.cmd-ico{width:52px;height:52px;border-radius:12px;font-size:26px;display:flex;align-items:center;justify-content:center;background:var(--bg2);border:1px solid var(--border)}
.cmd-card.ok .cmd-ico{background:rgba(77,158,126,.12);border-color:rgba(77,158,126,.25)}
.cmd-card.warn .cmd-ico{background:rgba(196,154,48,.12);border-color:rgba(196,154,48,.25)}
.cmd-card.red .cmd-ico{background:rgba(192,64,74,.12);border-color:rgba(192,64,74,.25)}
.cmd-card.cyan .cmd-ico{background:rgba(61,168,190,.12);border-color:rgba(61,168,190,.25)}
.cmd-title{font-family:var(--font-display);font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--text)}
.cmd-desc{font-size:14px;color:var(--text3)}
.cmd-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;margin-bottom:32px}
.acard,.a-card{background:var(--surface);border:1.5px solid var(--border2);border-radius:var(--r2);overflow:hidden;transition:all .25s}
.acard:hover,.a-card:hover{border-color:var(--border-bright);transform:translateY(-2px)}
.acard-h,.a-card-head{padding:14px 18px;border-bottom:1px solid var(--border);font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--text-muted);text-transform:uppercase}
.acard-b,.a-card-body{padding:16px 18px}
.cat-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r2);padding:18px;text-align:center;text-decoration:none;display:block;transition:all .25s;color:var(--text-body)}
.cat-card:hover{border-color:var(--border-bright);transform:translateY(-3px);color:var(--cyan)}
.inst-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r2);padding:20px;text-align:center;transition:all .25s}
.inst-card:hover{border-color:var(--border-bright);transform:translateY(-3px)}
.inst-stats{display:flex;justify-content:center;gap:16px;margin-top:10px}
.inst-stat{text-align:center}
.inst-stat-num{font-family:var(--font-display);font-size:18px;font-weight:900;color:var(--cyan)}
.inst-stat-label{font-size:11px;color:var(--text-muted);text-transform:uppercase}
.img-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r2);overflow:hidden;cursor:pointer;transition:all .2s}
.img-card:hover{border-color:var(--border-bright);transform:translateY(-2px)}
.img-card-info{padding:10px 12px;font-size:12px;color:var(--text-muted)}
.camp-card,.campana-card,.recarga-card,.cupon-card,.cliente-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r2);overflow:hidden;margin-bottom:12px;transition:all .2s}
.cupon-card,.recarga-card,.cliente-card{padding:18px 20px}
.cupon-card:hover,.recarga-card:hover{border-color:var(--border-bright)}
.banner-card,.banner-lateral-card{border-radius:var(--r2);overflow:hidden}
.card-precio{font-family:var(--font-display);font-size:28px;font-weight:900;color:var(--warn)}
.card-thumb{height:120px;background:var(--hull);overflow:hidden;display:flex;align-items:center;justify-content:center;font-size:40px}
.card-thumb img{width:100%;height:100%;object-fit:cover}
.card-includes{list-style:none;display:flex;flex-direction:column;gap:8px}
.card-includes li::before{content:'✓ ';color:var(--ok);font-weight:700}

/* ── CURSO CARDS ─────────────────────────────────────────── */
.curso-card{background:var(--surface);border:1px solid var(--border2);border-radius:var(--radius2);overflow:hidden;display:flex;flex-direction:column;transition:all .25s}
.curso-card:hover{border-color:var(--border-bright);transform:translateY(-4px);box-shadow:var(--sh2)}
.curso-thumb{height:160px;position:relative;overflow:hidden;background:linear-gradient(135deg,var(--surface2),var(--bg));display:flex;align-items:center;justify-content:center}
.curso-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.curso-card:hover .curso-thumb img{transform:scale(1.05)}
.curso-badge-gratis{position:absolute;top:10px;left:10px;background:var(--ok);color:#000;font-family:var(--font-display);font-size:10px;font-weight:900;padding:3px 10px;border-radius:20px;letter-spacing:.08em}
.curso-card-lateral{background:var(--surface);border:1px solid var(--border2);border-radius:var(--r2);overflow:hidden;display:flex;gap:12px;padding:10px;transition:all .2s}
.curso-card-lateral:hover{border-color:var(--border-bright)}
.curso-stat{font-family:var(--font-mono);font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:4px}

/* ── MODALES ─────────────────────────────────────────────── */
.modal-overlay{display:none;position:fixed;inset:0;z-index:999;background:rgba(0,0,0,.75);backdrop-filter:blur(6px);align-items:flex-start;justify-content:center;padding:20px;overflow-y:auto}
.modal-overlay.open,.modal-overlay[style*="flex"]{display:flex}
.modal-box{background:var(--bg-card);border:1.5px solid var(--border-bright);border-radius:18px;padding:32px;max-width:520px;width:100%;position:relative;animation:slideUp .25s ease;margin:auto}
@keyframes slideUp{from{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-close{position:absolute;top:16px;right:18px;font-size:20px;cursor:pointer;color:var(--text-muted);background:none;border:none;transition:color .2s}
.modal-close:hover{color:var(--danger)}
.modal-title{font-family:var(--font-display);font-size:18px;font-weight:900;color:var(--cyan);margin-bottom:6px;letter-spacing:.06em}
.modal-sub{font-size:13px;color:var(--text-muted);margin-bottom:20px}
.modal-btns,.modal-btn-row,.amodal-btns{display:flex;gap:10px;justify-content:flex-end;margin-top:20px;flex-wrap:wrap}
.modal-form{display:none}.modal-form.active{display:block}
.modal-tab{font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.08em;padding:8px 18px;border-radius:var(--r);border:1.5px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s}
.modal-tab.active{border-color:var(--border-bright);color:var(--cyan);background:var(--cyan-dim)}

/* ── FORMULARIOS ─────────────────────────────────────────── */
.form-group,.fg{margin-bottom:18px}
.form-group label,.fg label{display:block;font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:7px}
input[type="text"],input[type="email"],input[type="password"],input[type="number"],input[type="url"],input[type="search"],select,textarea{width:100%;padding:10px 14px;background:var(--bg2);border:1.5px solid var(--border);border-radius:var(--r);color:var(--text-body);font-family:var(--font-body);font-size:15px;outline:none;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{border-color:var(--border-bright);box-shadow:0 0 0 3px rgba(0,212,255,.1)}
textarea{resize:vertical;min-height:100px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ── TABLAS ──────────────────────────────────────────────── */
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th{padding:10px 14px;text-align:left;font-family:var(--font-mono);font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);border-bottom:1.5px solid var(--border)}
.data-table td{padding:12px 14px;border-bottom:1px solid var(--border);color:var(--text-body);vertical-align:middle}
.data-table tr:hover td{background:var(--bg-row)}

/* ── ALERTAS ─────────────────────────────────────────────── */
.alert-msg{padding:12px 16px;border-radius:8px;font-weight:700;font-size:14px;border:1.5px solid;margin-bottom:12px}
.alert-error{background:rgba(255,48,80,.08);border-color:rgba(255,48,80,.4);color:var(--danger)}
.alert-success{background:rgba(0,240,122,.08);border-color:rgba(0,240,122,.4);color:var(--ok)}
.alert-warn{background:rgba(255,208,64,.08);border-color:rgba(255,208,64,.4);color:var(--warn)}
.alert-info{background:rgba(0,212,255,.08);border-color:rgba(0,212,255,.4);color:var(--cyan)}
.a-alerts{background:rgba(196,154,48,.07);border:1.5px solid rgba(196,154,48,.25);border-radius:var(--r2);padding:18px 22px;margin-bottom:24px}
.a-alerts-title{font-family:var(--font-mono);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--yellow);margin-bottom:12px}
.a-chip{padding:7px 16px;border-radius:8px;font-size:14px;font-weight:700;transition:all .2s;text-decoration:none}
.a-chip-warn{background:rgba(196,154,48,.15);border:1px solid rgba(196,154,48,.3);color:var(--yellow)}
.a-chip-red{background:rgba(192,64,74,.12);border:1px solid rgba(192,64,74,.25);color:var(--red)}
.a-chip-warn:hover{background:var(--yellow);color:#fff}.a-chip-red:hover{background:var(--red);color:#fff}

/* ── LAYOUT ──────────────────────────────────────────────── */
.container,.a-container{max-width:1300px;margin:0 auto;padding:28px 24px 80px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}

/* ── EMPTY STATE ─────────────────────────────────────────── */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.empty-state .ico{font-size:52px;margin-bottom:16px}
.empty-state h3{font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--text-muted);margin-bottom:8px;letter-spacing:.08em}
.empty-state p{font-size:14px;color:var(--text-muted);margin-bottom:20px}

/* ── TABS ────────────────────────────────────────────────── */
.tab-btn{font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.08em;padding:8px 18px;border-radius:var(--r);border:1.5px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s}
.tab-btn.active{border-color:var(--border-bright);color:var(--cyan);background:var(--cyan-dim)}
.nav-tabs{display:flex;gap:6px;flex-wrap:wrap}

/* ── PROGRESS ────────────────────────────────────────────── */
.progress-bar-wrap{background:var(--bg2);border-radius:20px;height:8px;overflow:hidden}
.progress-bar-fill{height:100%;background:var(--grad);border-radius:20px;transition:width .5s}

/* ── THEME TOGGLE ────────────────────────────────────────── */
.theme-toggle,.toggle-theme{position:fixed;bottom:20px;right:20px;z-index:200;display:flex;gap:4px;background:var(--bg2);border:1.5px solid var(--border);border-radius:12px;padding:4px}
.tt-btn{width:34px;height:34px;border-radius:8px;border:none;background:transparent;cursor:pointer;font-size:16px;transition:all .2s;display:flex;align-items:center;justify-content:center}
.tt-btn:hover{background:var(--cyan-dim)}

/* ── MISC ────────────────────────────────────────────────── */
.save-status{font-family:var(--font-mono);font-size:12px;color:var(--text-muted);transition:all .3s}
.save-status.ok{color:var(--ok)}.save-status.err{color:var(--danger)}.save-status.save{color:var(--warn)}
.add-bloque-btn{display:flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--r);border:1.5px dashed var(--border);background:transparent;color:var(--text-muted);cursor:pointer;font-family:var(--font-display);font-size:12px;font-weight:700;transition:all .2s;width:100%;justify-content:center}
.add-bloque-btn:hover{border-color:var(--border-bright);color:var(--cyan);background:var(--cyan-dim)}
.btn-ajustar,.momento-btn,.monto-btn{padding:7px 14px;border-radius:var(--r);border:1.5px solid var(--border);background:var(--bg2);color:var(--text-muted);cursor:pointer;font-family:var(--font-display);font-size:12px;font-weight:700;transition:all .2s}
.btn-ajustar:hover,.momento-btn:hover,.monto-btn:hover,.momento-btn.sel,.monto-btn.sel{border-color:var(--border-bright);color:var(--cyan);background:var(--cyan-dim)}

/* ── HELPERS ─────────────────────────────────────────────── */
.text-muted{color:var(--text-muted)}.text-cyan{color:var(--cyan)}.text-ok{color:var(--ok)}.text-warn{color:var(--warn)}.text-danger{color:var(--danger)}
.font-display{font-family:var(--font-display)}.font-mono{font-family:var(--font-mono)}
.d-flex{display:flex}.d-grid{display:grid}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.flex-1{flex:1}.ml-auto{margin-left:auto}
.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}
.mb-8{margin-bottom:8px}.mb-12{margin-bottom:12px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}

/* ── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--border-bright)}

/* ── RESPONSIVE ──────────────────────────────────────────── */

/* ══════════════════════════════════════════════════════════
   ADMIN — clases específicas del panel de control
   ══════════════════════════════════════════════════════════ */

/* Navbar admin */
.a-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6,11,20,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 52px;
  display: flex; align-items: center;
}

/* Encabezado de página */
.a-page-hdr {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 22px; flex-wrap: wrap;
}
.a-page-title {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 900;
  letter-spacing: .1em; color: var(--text-primary);
}
.a-page-sub {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--text-muted);
  margin-top: 3px;
}

/* Layout 2 columnas admin */
.a-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}
@media(max-width: 900px) { .a-2col { grid-template-columns: 1fr; } }

/* Mini items de usuario/curso en listas */
.a-mini-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.a-mini-item:last-child { border-bottom: none; }

.a-av {
  width: 36px; height: 36px;
  border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(0,212,255,.25), rgba(148,96,192,.25));
  border: 1.5px solid var(--border-bright);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 14px; font-weight: 900;
  color: var(--cyan);
}

.a-mini-info { flex: 1; min-width: 0; }
.a-mini-name {
  font-weight: 700; font-size: 14px;
  color: var(--text-body);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  display: flex; align-items: center; gap: 6px;
}
.a-mini-sub {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--text-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* Role badges (rb) */
.rb {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  padding: 2px 9px; border-radius: 4px; text-transform: uppercase;
  letter-spacing: .06em; white-space: nowrap; flex-shrink: 0;
}
.rb-inst  { background: rgba(148,96,192,.14); color: var(--accent);  border: 1px solid rgba(148,96,192,.3); }
.rb-alum  { background: rgba(0,212,255,.10);  color: var(--cyan);    border: 1px solid rgba(0,212,255,.25); }
.rb-cli   { background: rgba(255,208,64,.10); color: var(--yellow);  border: 1px solid rgba(255,208,64,.25); }
.rb-admin { background: rgba(255,48,80,.10);  color: var(--danger);  border: 1px solid rgba(255,48,80,.25); }

/* Variante del stat para admin */
.a-stat.ok   .a-stat-n { color: var(--ok); }
.a-stat.warn .a-stat-n { color: var(--warn); }
.a-stat.cyan .a-stat-n { color: var(--cyan); }
.a-stat.red  .a-stat-n { color: var(--danger); }


@media(max-width:768px){
  .navbar{padding:0 16px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .cmd-grid{grid-template-columns:1fr}
  .modal-box{padding:24px 18px}
  .btn,.a-btn,.xbtn{padding:8px 14px;font-size:12px}
  .stat-n,.stat-num{font-size:24px}
  .container,.a-container{padding:20px 16px 60px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr 1fr}
  .nav-right{gap:6px}
}

/* ═══════════════════════════════════════════════════════════
   NEXUS VIDEO PREVIEW SYSTEM
   ═══════════════════════════════════════════════════════════ */
.nxvp{position:relative;overflow:hidden;background:var(--bg-body,#0d1e35);
  display:flex;align-items:center;justify-content:center;}
.nxvp img{width:100%;height:100%;object-fit:cover;transition:transform .3s;}
.nxvp:hover img{transform:scale(1.04);}
.nxvp-fallback{font-size:48px;opacity:.5;display:flex;align-items:center;
  justify-content:center;width:100%;height:100%;}

.nxvp-play-overlay{position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;
  background:rgba(0,0,0,0);transition:background .25s;}
.nxvp:hover .nxvp-play-overlay{background:rgba(0,0,0,.45);}
.nxvp-overlay-subtle{pointer-events:none;}

.nxvp-play-btn{width:52px;height:52px;border-radius:50%;
  background:rgba(255,0,0,.9);display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;opacity:0;transform:scale(.8);
  transition:opacity .25s,transform .25s;box-shadow:0 4px 20px rgba(255,0,0,.5);}
.nxvp:hover .nxvp-play-btn{opacity:1;transform:scale(1);}

.nxvp-duration{background:rgba(0,0,0,.75);color:#fff;
  font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:700;
  padding:3px 9px;border-radius:12px;opacity:0;transition:opacity .25s;}
.nxvp:hover .nxvp-duration{opacity:1;}

.nxvp-iframe-wrap{position:absolute;inset:0;z-index:10;}
.nxvp-iframe-wrap iframe{width:100%;height:100%;border:none;}

.nxvp-badge-preview{position:absolute;top:8px;left:8px;
  background:rgba(255,0,0,.85);color:#fff;
  font-family:'JetBrains Mono',monospace;font-size:10px;font-weight:900;
  padding:3px 8px;border-radius:4px;letter-spacing:.06em;}