/* Nút Tải Xuống Đếm Ngược */
.vndc-box{--vndc-c1:#2563eb;--vndc-c2:#7c3aed;--vndc-bg:#fff;--vndc-border:#e5e7eb;--vndc-text:#0f172a;--vndc-muted:#64748b;--vndc-track:#e5e7eb;
	display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
	margin:24px 0;padding:16px 20px;border:1px solid var(--vndc-border);border-radius:16px;
	background:var(--vndc-bg);box-shadow:0 6px 24px -8px rgba(15,23,42,.15);
	font-family:inherit;line-height:1.4;box-sizing:border-box;position:relative;overflow:hidden}
.vndc-box *{box-sizing:border-box}
.vndc-box::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--vndc-c1),var(--vndc-c2))}
.vndc-box [hidden]{display:none!important}

.vndc-info{display:flex;align-items:center;gap:14px;min-width:0;flex:1 1 220px}
.vndc-icon{flex:0 0 48px;width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:#fff;
	background:linear-gradient(135deg,var(--vndc-c1),var(--vndc-c2));box-shadow:0 6px 14px -6px var(--vndc-c1)}
.vndc-icon svg{width:24px;height:24px}
.vndc-meta{display:flex;flex-direction:column;min-width:0}
.vndc-name{font-weight:700;font-size:16px;color:var(--vndc-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.vndc-sub{font-size:13px;color:var(--vndc-muted);margin-top:3px}
.vndc-sub b{color:var(--vndc-text)}

.vndc-action{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.vndc-msg{font-size:14px;color:var(--vndc-muted);max-width:260px}
.vndc-msg:empty{display:none}

.vndc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:0;border-radius:999px;
	font-weight:700;font-size:15px;line-height:1;color:#fff!important;text-decoration:none!important;cursor:pointer;
	background:linear-gradient(135deg,var(--vndc-c1),var(--vndc-c2));box-shadow:0 8px 18px -6px var(--vndc-c1);
	transition:transform .15s ease,filter .15s ease,box-shadow .15s ease}
.vndc-btn:hover{transform:translateY(-2px);filter:brightness(1.08)}
.vndc-btn:active{transform:translateY(0)}
.vndc-btn:focus-visible{outline:3px solid var(--vndc-c2);outline-offset:3px}
.vndc-btn svg{width:18px;height:18px}

/* Đồng hồ đếm ngược */
.vndc-timer{position:relative;width:58px;height:58px;flex:0 0 58px;animation:vndc-in .3s ease}
.vndc-timer svg{width:58px;height:58px;transform:rotate(-90deg)}
.vndc-track{fill:none;stroke:var(--vndc-track);stroke-width:5}
.vndc-bar{fill:none;stroke:var(--vndc-c1);stroke-width:5;stroke-linecap:round;stroke-dasharray:163.36;stroke-dashoffset:0;transition:stroke-dashoffset .12s linear}
.vndc-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:19px;color:var(--vndc-text);font-variant-numeric:tabular-nums}

/* Sẵn sàng */
.vndc-ready .vndc-btn{background:linear-gradient(135deg,#16a34a,#22c55e);animation:vndc-pulse 1.8s infinite,vndc-in .3s ease}
.vndc-ready .vndc-msg{color:#16a34a;font-weight:600}

@keyframes vndc-pulse{0%{box-shadow:0 0 0 0 rgba(34,197,94,.55)}70%{box-shadow:0 0 0 14px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
@keyframes vndc-in{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}

/* Kiểu phẳng */
.vndc-theme-flat .vndc-btn,.vndc-theme-flat .vndc-icon{background:var(--vndc-c1)}
.vndc-theme-flat::before{background:var(--vndc-c1)}
.vndc-theme-flat.vndc-ready .vndc-btn{background:#16a34a}

/* Kiểu nền tối */
.vndc-theme-dark{--vndc-bg:#0f172a;--vndc-border:#1e293b;--vndc-text:#f1f5f9;--vndc-muted:#94a3b8;--vndc-track:#1e293b}

.vndc-error{padding:10px 14px;border-radius:8px;background:#fef2f2;color:#b91c1c;border:1px solid #fecaca;font-size:14px}

@media (max-width:560px){
	.vndc-box{padding:16px}
	.vndc-action{width:100%;justify-content:center}
	.vndc-msg{max-width:none;text-align:center;width:100%}
	.vndc-btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
	.vndc-btn,.vndc-ready .vndc-btn,.vndc-timer{animation:none;transition:none}
}