.nvt-cal-wrap{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:28px;max-width:1100px;margin:0 auto;padding:22px;background:var(--nvt-bg);color:var(--nvt-fg);border-radius:var(--nvt-radius);box-shadow:0 8px 28px rgba(0,0,0,.06);box-sizing:border-box;width:100%}
.nvt-aside{padding:10px 4px 10px 6px}
.nvt-title{margin:0 0 6px;font-size:22px;font-weight:700}
.nvt-desc{font-size:14px;color:var(--nvt-muted);margin:0 0 14px}
.nvt-form label{display:block;margin:10px 0 6px;font-weight:600;font-size:13px}
.nvt-form input,.nvt-form textarea{width:100%;padding:10px 12px;border:1px solid var(--nvt-border);border-radius:var(--nvt-radius);background:#fff;font-size:14px;box-sizing:border-box}
.nvt-main{border-left:1px solid var(--nvt-border);padding-left:8px}
.nvt-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.nvt-month{display:flex;align-items:center;gap:10px;font-weight:700;text-transform:capitalize}
.nvt-nav{width:34px;height:34px;border-radius:999px;border:1px solid var(--nvt-border);background:#fff;cursor:pointer}
.nvt-tz{color:var(--nvt-muted);font-size:13px}
.nvt-grid{border:1px solid var(--nvt-border);border-radius:var(--nvt-radius);overflow:hidden;background:#fff}
.nvt-weekdays{display:grid;grid-template-columns:repeat(7,1fr);background:#f9fafb;border-bottom:1px solid var(--nvt-border);font-size:11px;color:var(--nvt-muted);text-transform:uppercase}
.nvt-weekdays span{padding:8px;text-align:center}
.nvt-days{display:grid;grid-template-columns:repeat(7,1fr)}
.nvt-day{height:64px;border-right:1px solid var(--nvt-border);border-bottom:1px solid var(--nvt-border);display:flex;align-items:center;justify-content:center;cursor:pointer;background:var(--nvt-day-bg);font-size:14px}
.nvt-day.disabled{cursor:not-allowed;color:#c4c7ce;background:var(--nvt-day-bg-disabled)}
.nvt-day.today{box-shadow:inset 0 0 0 2px var(--nvt-day-bg-today)}
.nvt-day.selected{background:var(--nvt-day-bg-selected);color:#111827;font-weight:700}
.nvt-slot-pane{margin-top:14px}
.nvt-slot-head{font-weight:700;margin-bottom:8px;font-size:14px}
.nvt-slots{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.nvt-slot{border:1px solid var(--nvt-slot-border);border-radius:var(--nvt-radius);padding:9px 10px;text-align:center;background:var(--nvt-slot-bg);cursor:pointer;font-size:14px}
.nvt-slot:hover{background:var(--nvt-slot-bg-hover);}
.nvt-slot.active{background:var(--nvt-slot-bg-active);font-weight:700}
.nvt-empty{color:var(--nvt-muted);grid-column:1/-1;text-align:center;padding:18px}
.nvt-book{margin-top:12px;width:100%;padding:12px 14px;border:none;border-radius:var(--nvt-radius);background:var(--nvt-btn-bg);color:var(--nvt-btn-text);font-weight:800;cursor:pointer;font-size:15px}
.nvt-book:hover{background:var(--nvt-btn-hover);}
.nvt-book:disabled{opacity:.6;cursor:not-allowed}
.nvt-msg{min-height:20px;font-size:13px;margin-top:8px}
.nvt-msg.ok{color:var(--nvt-ok)} .nvt-msg.err{color:var(--nvt-err)}
/* presets */
.nvt-theme-modern{}
.nvt-theme-minimal{box-shadow:none;background:#f9fafb}
.nvt-theme-minimal .nvt-grid{border-radius:0;border:none;border-top:1px solid var(--nvt-border)}
.nvt-theme-classic{grid-template-columns:1fr;max-width:900px}
.nvt-theme-classic .nvt-main{border-left:none;border-top:1px solid var(--nvt-border);margin-top:12px;padding-top:12px}
.nvt-theme-brutal{box-shadow:0 0 0 3px #000;border-radius:0;background:#fff}
.nvt-theme-brutal .nvt-title{text-transform:uppercase;letter-spacing:.04em}
.nvt-theme-brutal .nvt-book{text-transform:uppercase;border-radius:0}
/* densidad y sombra */
.nvt-den-compact{padding:14px}
.nvt-den-spacious .nvt-slot{padding:14px}
.nvt-sh-none{box-shadow:none}
.nvt-sh-hard{box-shadow:0 18px 40px rgba(0,0,0,.18)}
@media(max-width:980px){
  .nvt-cal-wrap{grid-template-columns:1fr;max-width:100%;padding:16px}
  .nvt-main{border-left:none;border-top:1px solid var(--nvt-border);margin-top:12px;padding-top:12px;padding-left:0}
}
@media(max-width:640px){
  .nvt-cal-wrap{padding:12px}
  .nvt-slots{grid-template-columns:1fr}
}
<?php
echo $s['advanced']['custom_css'] ? "\n/* Custom CSS */\n".$s['advanced']['custom_css'] : '';
?>