:root{--ink:#dfe8f9;--muted:#9bacc7;--bg:#0c1322;--panel:#141f33;--line:#2b3a54;--blue:#7bb8ff}*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,sans-serif}a{color:var(--blue)}button,a,input,select{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:9px;padding:9px 14px;background:#243955;color:white}button:hover{background:#304f76}button:disabled{opacity:.6}
.vo-header{padding:18px 24px;border-bottom:1px solid var(--line);display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap}.vo-brand{font-weight:850;font-size:22px;color:white;text-decoration:none}.vo-brand span{font-size:13px;background:#28547d;padding:4px 8px;border-radius:7px}.vo-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}#voStatus{display:block;color:#a6dec5;font-size:13px}.vo-demo{padding:12px 24px;background:#263d2c;color:#d9f4d1}.vo-demo button{margin-left:16px}
.vo-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:24px;max-width:1800px;margin:auto}.vo-code,.vo-result{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px}.vo-tabs{display:flex;gap:8px;flex-wrap:wrap}.vo-tabs [aria-pressed=true]{background:#c7e2ff;color:#11243b}.vo-hint{color:var(--muted);font-size:14px}.vo-panel label{display:block;margin:12px 0 8px;font-size:14px}.vo-panel textarea{display:block;width:100%;min-height:420px;resize:vertical;background:#0a111e;color:#e5efff;border:1px solid var(--line);border-radius:10px;padding:16px;font:14px/1.65 Consolas,monospace;tab-size:2}
.vo-panel input,.vo-panel select{max-width:100%;width:100%;padding:10px;border:1px solid var(--line);background:#0a111e;color:white;border-radius:8px}.vo-panel pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.65 Consolas,monospace;background:#0a111e;padding:16px;border-radius:12px;max-height:340px;overflow:auto}#phpForm button{margin-top:16px}#phpResult{display:block;background:#18382d;color:#d1f5e3;padding:15px;margin-top:15px;border-radius:10px;white-space:pre-wrap}
.vo-result-head{display:flex;gap:10px;justify-content:space-between;align-items:center}iframe{width:100%;min-height:510px;background:white;border:0;border-radius:10px}.vo-learning{border-top:1px solid var(--line);padding-top:15px;margin-top:18px;color:var(--muted);font-size:14px}.vo-learning summary{cursor:pointer;color:var(--ink);font-weight:700}footer{text-align:center;padding:20px;font-size:13px;color:var(--muted)}[hidden]{display:none!important}:focus-visible{outline:3px solid #ffcf5d;outline-offset:3px}
@media(max-width:900px){.vo-layout{grid-template-columns:1fr;padding:12px}.vo-header{padding:14px}.vo-panel textarea{min-height:320px}iframe{min-height:380px}}

.php-input-row{display:grid;grid-template-columns:1fr 1.4fr auto;gap:8px;margin:9px 0}.vo-error{color:#ffb6b6;white-space:pre-wrap}#phpFreeResult{max-height:280px;overflow:auto}#phpHtmlPreview{min-height:200px;margin-top:12px}
@media(max-width:600px){.php-input-row{grid-template-columns:1fr}.php-input-row button{justify-self:start}}