@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#16A34A;--primary-light:#4ADE80;--primary-glow:rgba(22,163,74,.2);
  --accent:#3B82F6;--red:#EF4444;--yellow:#F59E0B;
  --bg:#0A120F;--bg2:#142520;--bg-card:rgba(20,37,32,.85);
  --text:#F1F5F9;--text2:#94A3B8;--text3:#64748B;
  --border:rgba(148,163,184,.1);--radius:12px;--radius-sm:8px;
  --font:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',monospace;
  --tr:.25s ease;
}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(22,163,74,.04) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:840px;margin:0 auto;padding:24px 20px 60px}
.hdr{text-align:center;padding:40px 0 24px}
.hdr__icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),#15803D);font-size:32px;margin-bottom:16px;box-shadow:0 8px 30px var(--primary-glow);animation:fl 3s ease-in-out infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.hdr h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--text),var(--primary-light));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hdr p{color:var(--text2);font-size:.95rem;margin:8px auto 0}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;backdrop-filter:blur(16px);margin-bottom:16px}
.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;flex-wrap:wrap;gap:8px}
.card-title{font-size:.9rem;font-weight:700;margin-bottom:0}
.select{padding:8px 12px;font-family:var(--font);font-size:.82rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none}
.select:focus{border-color:var(--primary)}
.code-area{width:100%;padding:14px;font-family:var(--mono);font-size:.78rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);outline:none;resize:vertical;line-height:1.6;white-space:pre-wrap}
.input-area{color:var(--primary-light)}
.output-area{color:var(--primary-light);min-height:80px;max-height:300px;overflow-y:auto;margin:0;resize:none}
.btn{padding:9px 16px;font-family:var(--font);font-size:.82rem;font-weight:600;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--tr)}
.btn-sm{padding:6px 12px;font-size:.75rem}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#15803D}
.btn-outline{background:transparent;color:var(--text2);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
/* Breakdown */
.bd-step{display:flex;gap:8px;padding:8px 12px;background:var(--bg);border-radius:var(--radius-sm);margin-bottom:6px;align-items:flex-start}
.bd-num{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(22,163,74,.15);color:var(--primary);font-size:.72rem;font-weight:700;flex-shrink:0}
.bd-text{flex:1;font-size:.82rem;color:var(--text2);line-height:1.5}
.bd-func{font-family:var(--mono);color:var(--primary-light);font-weight:600}
/* Lang grid */
.lang-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.lang-block{background:var(--bg);border-radius:var(--radius-sm);overflow:hidden}
.lang-label{font-size:.72rem;font-weight:700;color:var(--text3);padding:6px 10px;border-bottom:1px solid var(--border)}
.lang-code{padding:10px;font-family:var(--mono);font-size:.72rem;color:var(--primary-light);line-height:1.5;white-space:pre-wrap;max-height:150px;overflow-y:auto}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);padding:10px 20px;background:var(--bg2);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--text);font-size:.85rem;font-weight:500;z-index:1000;opacity:0;transition:all .3s ease;pointer-events:none}
.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:640px){.lang-grid{grid-template-columns:1fr}.app{padding:16px 12px 48px}.hdr h1{font-size:1.5rem}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--bg2);border-radius:3px}
::selection{background:var(--primary);color:var(--bg)}