*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--font-primary: "Inter", system-ui, Arial, sans-serif;--font-size-base: 16px;--color-bg: #f5f7fa;--color-bg-alt: #ffffff;--color-text: #1a1a1a;--color-text-light: #4a4a4a;--color-primary: #007bff;--color-primary-dark: #0060d6;--color-danger: #e63946;--color-success: #2ecc71;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 18px;--shadow-sm: 0 4px 12px rgba(0,0,0,.08);--shadow-md: 0 6px 18px rgba(0,0,0,.12);--shadow-lg: 0 12px 40px rgba(0,0,0,.18);--transition-fast: .2s ease;--transition-mid: .3s ease;--transition-slow: .45s ease;font-family:var(--font-primary);font-size:var(--font-size-base);height:100%}html,body{width:100%;min-height:100%;background:var(--color-bg);color:var(--color-text);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:var(--color-primary);font-weight:600}a:hover{color:var(--color-primary-dark)}.container{width:100%;max-width:1100px;padding:20px;margin:0 auto}h1{font-size:2.6rem;font-weight:800;margin-bottom:14px}h2{font-size:2rem;font-weight:700;margin-bottom:12px}h3{font-size:1.4rem;font-weight:600;margin-bottom:8px}button{font-family:var(--font-primary);border:none;padding:12px 18px;border-radius:var(--radius-md);background:var(--color-primary);color:#fff;font-size:1rem;cursor:pointer;transition:var(--transition-mid)}button:hover{background:var(--color-primary-dark);transform:translateY(-2px)}@media(max-width:600px){h1{font-size:2.2rem}h2{font-size:1.7rem}button{font-size:.95rem}}body,html{margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#1e293b,#0f172a);color:#e0e7ff;height:100%;overflow-x:hidden}.admin-root{display:flex;height:100vh;background:#0f172ad9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:inset 0 0 100px #0009}.admin-sidebar{width:260px;background:#f5f5f5;color:#1a1a1a;display:flex;flex-direction:column;padding:30px 20px;box-shadow:0 2px 8px #0000001a;border-top-right-radius:20px;border-bottom-right-radius:20px;position:relative;z-index:10;transition:width .3s ease}.admin-sidebar h2{margin:0 0 25px;font-size:2em;font-weight:700;letter-spacing:1.2px;text-align:center;text-shadow:none;color:#1a1a1a;animation:headingPop .8s ease forwards}.admin-sidebar nav{display:flex;flex-direction:column;gap:15px}.admin-sidebar nav a{text-decoration:none;color:#1a1a1a;padding:12px 18px;border-radius:12px;font-weight:600;font-size:1.1em;display:flex;align-items:center;gap:10px;box-shadow:inset 0 0 0 transparent;transition:all .35s cubic-bezier(.4,0,.2,1);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:transparent}.admin-sidebar nav a:hover,.admin-sidebar nav a.active{background:#e0e0e0;color:#1a1a1a;box-shadow:0 4px 15px #0000001a;transform:translate(5px)}.sidebar-footer{margin-top:auto}.sidebar-footer button{width:100%;background:#f5f5f5;border:none;border-radius:14px;padding:14px;color:#1a1a1a;font-weight:700;font-size:1.1em;cursor:pointer;box-shadow:0 6px 15px #0000001a;transition:background .4s ease,transform .3s ease;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.sidebar-footer button:hover{background:#e0e0e0;transform:scale(1.05);box-shadow:0 8px 20px #00000026}.admin-main{flex:1;padding:40px 50px;overflow-y:auto;background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top-left-radius:30px;border-bottom-left-radius:30px;box-shadow:inset 0 0 50px #ffffff80;display:flex;flex-direction:column;color:#1a1a1a}.admin-panel{background:#f0f0f0;border-radius:20px;padding:30px 35px;box-shadow:0 12px 30px #0000001a;margin-bottom:40px;color:#1a1a1a;animation:fadeInUp .8s ease forwards;transform:translateY(20px);opacity:0;transition:box-shadow .3s ease}.admin-panel:hover{box-shadow:0 18px 45px #00000026;transform:translateY(0)}.admin-panel h2{margin-top:0;font-size:2.2em;margin-bottom:25px;font-weight:700;letter-spacing:1.3px;color:#1a1a1a;text-shadow:none;animation:headingPop .8s ease forwards}.dashboard-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:25px;margin-top:15px}.dashboard-cards .card{background:#fff;color:#1a1a1a;padding:30px 25px;border-radius:20px;box-shadow:0 10px 25px #0000001a;text-align:center;font-weight:600;font-size:1.15em;cursor:default;-webkit-user-select:none;user-select:none;transition:all .4s cubic-bezier(.4,0,.2,1);animation:fadeInUp .9s ease forwards;transform:translateY(20px);opacity:0;display:flex;flex-direction:column;justify-content:center;gap:12px}.dashboard-cards .card:hover{transform:translateY(-10px) scale(1.05);box-shadow:0 18px 40px #00000026;background:#f0f0f0}.dashboard-cards .card h3{margin:0;font-size:1.4em;font-weight:700;text-shadow:none}.words-actions{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:30px}.words-actions input[type=text],.words-actions input[type=file],.words-actions button{padding:14px 18px;border-radius:14px;border:none;font-size:1em;font-weight:600;transition:all .3s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#f5f5f5;color:#1a1a1a;box-shadow:0 4px 15px #0000001a;cursor:pointer}.words-actions input[type=text],.words-actions input[type=file]{flex:1 1 250px;border:1px solid transparent}.words-actions input[type=text]:focus,.words-actions input[type=file]:focus{outline:none;border-color:#b0b0b0;box-shadow:0 0 10px #b0b0b0;background:#eaeaea;color:#1a1a1a}.words-actions button{background:#f5f5f5;color:#1a1a1a;font-weight:700;box-shadow:0 6px 20px #0000001a;border-radius:14px;cursor:pointer;transition:background .4s ease,transform .3s ease}.words-actions button:hover{background:#e0e0e0;transform:scale(1.05);box-shadow:0 8px 25px #00000026}.words-list .word-row{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid rgba(26,26,26,.15);border-radius:14px;margin-bottom:12px;background:#fafafa;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 4px 12px #1a1a1a0d;transition:background .3s ease;color:#1a1a1a}.words-list .word-row:hover{background:#f0f0f0;box-shadow:0 6px 18px #1a1a1a1a}.row-actions button{margin-left:10px;background:#f5f5f5;border:none;border-radius:14px;padding:8px 14px;color:#1a1a1a;font-weight:600;cursor:pointer;transition:background .3s ease,transform .2s ease;box-shadow:0 4px 12px #0000001a}.row-actions button:hover{background:#e0e0e0;transform:scale(1.1);box-shadow:0 6px 18px #00000026}.admin-login-container{display:flex;justify-content:center;align-items:center;height:100vh;background:linear-gradient(135deg,#1e293b,#0f172a);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;padding:20px;overflow:hidden}.admin-login-box{background:#f5f5f5d9;padding:40px 50px;border-radius:24px;box-shadow:0 12px 40px #0000001a;width:360px;text-align:center;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border:1px solid rgba(140,158,255,.3);animation:fadeInDown 1s ease forwards;color:#1a1a1a}.admin-login-box h2{margin-bottom:30px;font-size:2.4em;font-weight:700;color:#4a4a4a;text-shadow:none;animation:headingPop 1s ease forwards}.admin-input{width:100%;padding:14px 16px;margin-bottom:20px;border-radius:18px;border:none;font-size:1.1em;outline:none;background:#f5f5f5;color:#1a1a1a;box-shadow:inset 0 0 12px #8c9eff33;transition:background .3s ease,box-shadow .3s ease}.admin-input::placeholder{color:#a0a0a0aa}.admin-input:focus{background:#eaeaea;box-shadow:0 0 16px #b0b0b0;color:#1a1a1a}.admin-btn{width:100%;padding:16px 0;background:#f5f5f5;border:none;border-radius:24px;color:#1a1a1a;font-size:1.2em;font-weight:700;cursor:pointer;box-shadow:0 8px 25px #0000001a;transition:background .4s ease,transform .3s ease}.admin-btn:hover{background:#e0e0e0;transform:scale(1.05);box-shadow:0 10px 30px #00000026}.admin-error{margin-top:15px;color:#d9534f;font-weight:700;font-size:1em;text-shadow:none}label{color:#1a1a1a;font-weight:600;-webkit-user-select:none;user-select:none}@keyframes headingPop{0%{opacity:0;transform:scale(.85);text-shadow:none}60%{opacity:1;transform:scale(1.1);text-shadow:none}to{transform:scale(1);text-shadow:none}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@media(max-width:900px){.admin-root{flex-direction:column}.admin-sidebar{width:100%;height:auto;flex-direction:row;padding:15px 20px;border-radius:0 0 20px 20px;box-shadow:0 2px 8px #0000001a;background:#f5f5f5;color:#1a1a1a}.admin-sidebar h2{flex:1;font-size:1.6em;margin-bottom:0;text-align:left;color:#1a1a1a;text-shadow:none}.admin-sidebar nav{flex-direction:row;gap:12px;flex:3;justify-content:flex-end}.admin-sidebar nav a{padding:10px 14px;font-size:1em;border-radius:10px;color:#1a1a1a;background:transparent}.sidebar-footer{margin-top:0;margin-left:20px}.sidebar-footer button{width:auto;padding:10px 20px;font-size:1em;border-radius:14px;background:#f5f5f5;color:#1a1a1a;box-shadow:0 6px 15px #0000001a}.admin-main{padding:30px 20px;border-radius:0;background:#fffc;color:#1a1a1a}.admin-panel{padding:25px 20px;background:#f0f0f0;color:#1a1a1a}.dashboard-cards{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px}}@media(max-width:500px){.admin-sidebar{flex-direction:column;width:100%;padding:20px 15px;border-radius:0 0 20px 20px;background:#f5f5f5;color:#1a1a1a}.admin-sidebar h2{text-align:center;margin-bottom:15px;color:#1a1a1a}.admin-sidebar nav{flex-direction:column;gap:10px;justify-content:center}.sidebar-footer{margin-left:0;margin-top:20px}.admin-main{padding:20px 15px;background:#fffc;color:#1a1a1a}.admin-panel{padding:20px 15px;background:#f0f0f0;color:#1a1a1a}.dashboard-cards{grid-template-columns:1fr;gap:15px}.words-actions{flex-direction:column}.words-actions input[type=text],.words-actions input[type=file],.words-actions button{width:100%;font-size:1em;background:#f5f5f5;color:#1a1a1a}.row-actions button{padding:8px 12px;font-size:.9em;background:#f5f5f5;color:#1a1a1a}.admin-login-box{width:100%;padding:30px 25px;border-radius:20px;background:#f5f5f5d9;color:#1a1a1a}}#app{width:100%;min-height:100vh;padding:80px 100px;background:linear-gradient(160deg,#e0f0ff,#fff);background-attachment:fixed;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;animation:fadeIn .7s ease-out;position:relative;overflow:hidden}#app:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 30%,rgba(77,124,255,.08),transparent 70%);animation:bgMove 25s linear infinite;pointer-events:none;z-index:0}@keyframes bgMove{0%{transform:rotate(0) translate(0) rotate(0)}50%{transform:rotate(180deg) translate(10%) rotate(180deg)}to{transform:rotate(360deg) translate(0) rotate(360deg)}}h2{font-size:2.8rem;font-weight:900;margin-bottom:50px;color:#111;letter-spacing:-1px;text-align:center;z-index:1}h3{color:#000}.appHeading{font-size:3rem;font-weight:900;text-align:center;color:#1a1a1a;margin-bottom:60px;letter-spacing:-1px;position:relative;z-index:2;background:linear-gradient(135deg,#4d7cff,#3b5ed1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-shadow:2px 2px 8px rgba(0,0,0,.08);animation:headingPop .8s ease-out forwards}@keyframes headingPop{0%{opacity:0;transform:translateY(-20px) scale(.95)}50%{opacity:.6;transform:translateY(5px) scale(1.02)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:900px){.appHeading{font-size:2.4rem;margin-bottom:40px}}@media(max-width:500px){.appHeading{font-size:1.9rem;margin-bottom:30px}}button{width:100%;max-width:420px;padding:20px 28px;margin-bottom:20px;border-radius:20px;font-size:1.25rem;font-weight:700;cursor:pointer;color:#fff;background:linear-gradient(145deg,#4d7cff,#3b5ed1);border:none;box-shadow:0 12px 35px #0000002e,0 4px 8px #0000000f inset;transition:all .35s ease;position:relative;z-index:1}button:hover{transform:translateY(-5px) scale(1.03);box-shadow:0 16px 50px #00000038,0 6px 12px #00000014 inset}button:active{transform:scale(.97)}.back{background:#444!important}.word,.translation,.example{background:#ffffffb8;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);padding:28px 24px;border-radius:24px;margin-bottom:28px;width:100%;max-width:540px;box-shadow:0 12px 35px #00000026,0 4px 12px #0000000d inset;transition:transform .3s ease,box-shadow .3s ease;z-index:1}.word{font-size:2.2rem;font-weight:900;color:#111}.translation{font-size:1.6rem;color:#333}.example{font-size:1.15rem;color:#555;font-style:italic}.option{background:#ffffffbf;padding:20px;margin-bottom:20px;border-radius:20px;cursor:pointer;font-size:1.25rem;font-weight:600;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 8px 30px #0000001f,0 3px 8px #0000000d inset;transition:all .35s ease}.option:hover{transform:translateY(-4px) scale(1.03);background:#ffffffe0}.correct{background:#35c46a!important;color:#fff!important;transform:scale(1.04)}.wrong{background:#e63946!important;color:#fff!important}input[type=text]{width:100%;max-width:540px;padding:18px;margin-bottom:20px;font-size:1.2rem;border-radius:20px;border:2px solid #ccc;transition:.3s ease}input[type=text]:focus{border-color:#4d7cff;box-shadow:0 0 0 6px #4d7cff33}#intelligentBoxOverlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:4000;animation:fadeIn .35s ease}#intelligentBox{background:#ffffffe0;padding:60px 40px;max-width:580px;width:90%;border-radius:30px;text-align:center;box-shadow:0 16px 50px #00000040;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);animation:popup .3s ease}#intelligentBox .word{font-size:2.3rem;font-weight:900;margin-bottom:16px}#intelligentBox .translation{font-size:1.7rem;color:#333;margin-bottom:20px}#intelligentBox .additionalInfo{font-size:1.2rem;color:#555;font-style:italic}@keyframes popup{0%{opacity:0;transform:translateY(40px) scale(.88)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}#app.learning-mode .word,#app.learning-mode .translation{margin-bottom:36px}#app.quiz-mode .option,#app.test-mode input[type=text]{margin-bottom:28px}#app.intelligent-mode .word,#app.intelligent-mode .translation{margin-bottom:40px}@media(max-width:900px){#app{padding:60px 40px}h2{font-size:2.2rem}button{font-size:1.1rem;padding:18px 24px}.word{font-size:2rem}.translation{font-size:1.4rem}.example{font-size:1.1rem}input[type=text]{font-size:1.1rem;padding:16px}}@media(max-width:500px){#app{padding:35px 25px}h2{font-size:1.8rem}button{font-size:1rem;padding:14px 20px}.word{font-size:1.6rem}.translation{font-size:1.2rem}.example{font-size:1rem}input[type=text]{font-size:1rem;padding:14px}}.appHeading{background:linear-gradient(135deg,#4d7cff,#3b5ed1,#ff6ec7,#4d7cff);background-size:300% 300%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;transition:background-position .4s ease,transform .3s ease;cursor:pointer}.appHeading:hover{animation:gradientShift 3s ease infinite;transform:scale(1.03)}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}#app.learning-mode .appHeading{perspective:1000px}.appHeading{display:inline-block;transition:transform .1s ease}#app.learning-mode:hover .appHeading{transform:rotateX(var(--mouse-y, 0deg)) rotateY(var(--mouse-x, 0deg))}.small{color:#000}