@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap";:root{--bg-color:#0f172a;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#3b82f6;--primary-glow:#3b82f666;--success:#10b981;--danger:#ef4444;--card-bg:#1e293bb3;--card-border:#ffffff1a;--card-shadow:0 8px 32px 0 #0000005e}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);background-image:radial-gradient(circle at 100% 0,#1e293b,#0f172a);flex-direction:column;min-height:100vh;font-family:Inter,sans-serif;display:flex;overflow-x:hidden}#root{flex-direction:column;flex:1;display:flex}h1,h2,h3{letter-spacing:-.05em;font-weight:800}a{color:var(--primary);text-decoration:none;transition:all .2s}a:hover{text-shadow:0 0 8px var(--primary-glow)}.btn{background:var(--primary);color:#fff;cursor:pointer;box-shadow:0 4px 14px 0 var(--primary-glow);border:none;border-radius:9999px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:all .3s;display:inline-flex}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #3b82f699}.btn:active{transform:translateY(1px)}.btn-danger{background:var(--danger);box-shadow:0 4px 14px #ef444466}.btn-danger:hover{box-shadow:0 6px 20px #ef444499}.btn-success{background:var(--success);box-shadow:0 4px 14px #10b98166}.btn-success:hover{box-shadow:0 6px 20px #10b98199}.form-group{flex-direction:column;gap:.5rem;margin-bottom:1.5rem;display:flex}.form-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.875rem;font-weight:600}.form-control{border:1px solid var(--card-border);color:#fff;background:#0f172a99;border-radius:.5rem;outline:none;padding:.75rem 1rem;font-size:1rem;transition:all .3s}.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.glass-panel{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--card-border);box-shadow:var(--card-shadow);border-radius:1.5rem;padding:2.5rem}.container{width:100%;max-width:1250px;margin:0 auto;padding:0 2rem}.nav-bar{border-bottom:1px solid var(--card-border);justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1.5rem 0;display:flex}.nav-brand{background:linear-gradient(135deg,#60a5fa,#3b82f6);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:800}.nav-links{align-items:center;gap:1.5rem;display:flex}.flashcard-wrapper{perspective:1000px;cursor:pointer;width:100%;max-width:450px;height:550px;margin-bottom:2rem;position:relative}.flashcard-inner{text-align:center;width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,.2,.2,1);position:relative}.flashcard-wrapper.is-flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;background:var(--card-bg);border:1px solid var(--card-border);width:100%;height:100%;box-shadow:var(--card-shadow);border-radius:1.5rem;flex-direction:column;justify-content:center;align-items:center;padding:2rem;display:flex;position:absolute;transform:translateZ(0)}.flashcard-front{background:linear-gradient(145deg,#1e293b,#0f172a)}.flashcard-back{background:linear-gradient(145deg,#1e293b,#2563eb);border:1px solid #3b82f64d;transform:rotateY(180deg)translateZ(0)}.word-display{text-shadow:0 4px 12px #00000080;margin-bottom:1rem;font-size:3rem;font-weight:800}.word-hint{color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em;opacity:.7;font-size:.875rem}.swipe-left{animation:.5s forwards swipeLeft}.swipe-right{animation:.5s forwards swipeRight}@keyframes swipeLeft{0%{opacity:1;transform:translate(0)rotate(0)}to{opacity:0;transform:translate(-200px)rotate(-15deg)}}@keyframes swipeRight{0%{opacity:1;transform:translate(0)rotate(0)}to{opacity:0;transform:translate(200px)rotate(15deg)}}.action-buttons{justify-content:center;gap:2rem;margin-top:3rem;display:flex}.fade-in{animation:.5s ease-out forwards fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.spinner{border:4px solid #ffffff1a;border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;margin:2rem auto;animation:1s ease-in-out infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:3rem;display:grid}.stat-card{text-align:center;padding:2rem}.stat-value{margin-bottom:.5rem;font-size:3rem;font-weight:800}.stat-value.success{color:var(--success)}.stat-value.danger{color:var(--danger)}.stat-value.primary{color:var(--primary)}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.875rem;font-weight:600}.list-item{border-bottom:1px solid var(--card-border);justify-content:space-between;align-items:center;padding:1rem;display:flex}.list-item:last-child{border-bottom:none}