/* AI Tech Acronym Decoder — Purple Dark Theme */
:root {
  --primary:#8B5CF6;--primary-light:#A78BFA;--primary-dark:#7C3AED;
  --accent:#EC4899;--accent-light:#F472B6;
  --bg-base:#0C0A14;--bg-surface:#14112A;--bg-elevated:#1E1A3A;
  --bg-glass:rgba(20,17,42,0.7);--bg-glass-border:rgba(139,92,246,0.12);
  --text-primary:#F0E6FF;--text-secondary:#A89EC4;--text-muted:#6B5F8A;
  --border:rgba(139,92,246,0.15);--border-strong:rgba(139,92,246,0.3);
  --radius:10px;--radius-sm:6px;
  --shadow:0 4px 24px rgba(0,0,0,0.35);
  --font-sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono','Fira Code','Consolas',monospace;
  --transition:250ms ease;
  --cat-ai:#8B5CF6;--cat-cloud:#06B6D4;--cat-sec:#EF4444;--cat-net:#F59E0B;
  --cat-dev:#10B981;--cat-data:#3B82F6;--cat-web:#EC4899;--cat-hw:#64748B;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);background:var(--bg-base);color:var(--text-primary);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;background-image:radial-gradient(ellipse at 30% 0%,rgba(139,92,246,.06) 0%,transparent 50%)}
.glass-card{background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--bg-glass-border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);transition:border-color var(--transition)}
.glass-card:hover{border-color:var(--border-strong)}
.app-header{position:sticky;top:0;z-index:100;background:rgba(12,10,20,.88);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:.75rem 1.5rem}
.header-content{max-width:900px;margin:0 auto;display:flex;align-items:center}
.logo-group{display:flex;align-items:center;gap:.75rem}
.logo-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(139,92,246,.1);border-radius:var(--radius-sm);border:1px solid rgba(139,92,246,.2)}
.app-header h1{font-size:1.15rem;font-weight:700;background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.75rem;color:var(--text-muted)}
.container{max-width:900px;margin:0 auto;padding:2rem 1.5rem;width:100%;flex:1;display:flex;flex-direction:column;gap:1.25rem}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1rem;font-family:var(--font-sans);font-size:.85rem;font-weight:500;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:var(--bg-elevated);color:var(--text-primary)}
.btn:hover{border-color:var(--primary);background:rgba(139,92,246,.1)}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-color:var(--primary);color:#fff;box-shadow:0 2px 12px rgba(139,92,246,.3)}
.btn-primary:hover{box-shadow:0 4px 20px rgba(139,92,246,.4);transform:translateY(-1px)}
.btn-sm{padding:.35rem .7rem;font-size:.8rem}
.btn-row{display:flex;gap:.5rem;margin-top:.75rem;flex-wrap:wrap}
.section-title{display:flex;align-items:center;gap:.5rem;font-size:1rem;font-weight:600;color:var(--primary-light);margin-bottom:1rem}
.code-textarea{width:100%;padding:1rem;font-family:var(--font-sans);font-size:.85rem;line-height:1.7;color:var(--text-primary);background:var(--bg-base);border:1px solid var(--border);border-radius:var(--radius-sm);resize:vertical;transition:border-color var(--transition)}
.code-textarea::placeholder{color:var(--text-muted)}
.code-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(139,92,246,.15)}
.stats-row{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}
.stat-card{text-align:center;padding:1rem}
.stat-value{font-size:1.75rem;font-weight:700;color:var(--primary-light)}
.stat-label{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-top:.25rem}
/* Output Text */
.output-text{font-size:.88rem;line-height:1.8;color:var(--text-primary);padding:1rem;background:var(--bg-base);border:1px solid var(--border);border-radius:var(--radius-sm)}
.acronym-highlight{position:relative;cursor:help;font-weight:600;border-bottom:2px dotted var(--primary);padding:.1rem .2rem;border-radius:2px;transition:background var(--transition)}
.acronym-highlight:hover{background:rgba(139,92,246,.15)}
.acronym-tooltip{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--bg-elevated);border:1px solid var(--primary);border-radius:var(--radius-sm);padding:.5rem .75rem;font-size:.75rem;font-weight:400;white-space:nowrap;z-index:50;opacity:0;pointer-events:none;transition:opacity .2s;box-shadow:0 4px 12px rgba(0,0,0,.4)}
.acronym-highlight:hover .acronym-tooltip{opacity:1;pointer-events:auto}
.tooltip-expansion{font-weight:600;color:var(--primary-light);display:block}
.tooltip-desc{color:var(--text-secondary);display:block;margin-top:.2rem}
.category-badge{display:inline-block;font-size:.6rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:.1rem .35rem;border-radius:3px;margin-left:.3rem}
.cat-ai{background:rgba(139,92,246,.15);color:var(--cat-ai)}
.cat-cloud{background:rgba(6,182,212,.15);color:var(--cat-cloud)}
.cat-security{background:rgba(239,68,68,.15);color:var(--cat-sec)}
.cat-networking{background:rgba(245,158,11,.15);color:var(--cat-net)}
.cat-devops{background:rgba(16,185,129,.15);color:var(--cat-dev)}
.cat-database{background:rgba(59,130,246,.15);color:var(--cat-data)}
.cat-web{background:rgba(236,72,153,.15);color:var(--cat-web)}
.cat-hardware{background:rgba(100,116,139,.15);color:var(--cat-hw)}
/* Acronym List */
.acronym-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:.5rem}
.acronym-card{padding:.6rem .8rem;background:var(--bg-base);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.82rem}
.acronym-card strong{color:var(--primary-light);font-family:var(--font-mono)}
.acronym-card span{color:var(--text-secondary);display:block;margin-top:.15rem}
.toast{position:fixed;bottom:1.5rem;right:1.5rem;background:var(--bg-elevated);border:1px solid var(--primary);color:var(--primary-light);padding:.5rem 1rem;border-radius:var(--radius-sm);font-size:.8rem;z-index:200;transform:translateY(80px);opacity:0;transition:all .3s;pointer-events:none}
.toast.show{transform:translateY(0);opacity:1}
.app-footer{text-align:center;padding:1.5rem;font-size:.75rem;color:var(--text-muted);border-top:1px solid var(--border)}
@media(max-width:768px){.container{padding:1rem}.glass-card{padding:1rem}.stats-row{grid-template-columns:1fr 1fr}.acronym-list{grid-template-columns:1fr}}
@media(max-width:480px){.app-header h1{font-size:1rem}.logo-icon{display:none}}