:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--primary: #14b8a6;--primary-dark: #0d9488;--primary-light: #2dd4bf;--secondary: #06b6d4;--accent: #f0fdfa;--glass-bg: rgba(20, 184, 166, .1);--glass-border: rgba(20, 184, 166, .2)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#0d9488,#06b6d4);min-height:100vh;color:#fff;overflow-x:hidden}.app{min-height:100vh;width:100%}.container{width:100%;max-width:1200px;margin:0 auto;padding:1rem;padding-top:90px;padding-bottom:100px}.page-content{width:100%;max-width:800px;margin:0 auto}.top-bar{position:fixed;top:0;left:0;right:0;height:70px;display:flex;justify-content:space-between;align-items:center;padding:0 max(1rem,env(safe-area-inset-left)) 0 max(1rem,env(safe-area-inset-right));background:#0d9488f2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:1000;box-shadow:0 2px 20px #0003;border-bottom:1px solid rgba(255,255,255,.1)}.language-switch{width:85px;height:42px;background:#ffffff26;border:2px solid rgba(255,255,255,.25);border-radius:25px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding:0 10px;position:relative;transition:all .3s}.language-switch-slider{position:absolute;left:4px;width:36px;height:36px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;box-shadow:0 2px 8px #0003;transition:all .3s cubic-bezier(.4,0,.2,1)}.lang-label{font-size:.8rem;font-weight:700;color:#fff;opacity:.8;z-index:1;pointer-events:none;transition:opacity .3s}.lang-label.active{opacity:.3}.logout-btn{background:#ffffff26;border:2px solid rgba(255,255,255,.25);color:#fff;padding:.7rem 1.5rem;border-radius:20px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s}.logout-btn:hover{background:#ffffff40}*/ .glass-container{background:#ffffff14;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;padding:1.5rem;border:1px solid rgba(255,255,255,.15);box-shadow:0 8px 32px #0000001a;margin:1rem 0}.hero{text-align:center;margin-bottom:2rem}.hero h1{font-size:clamp(3rem,10vw,5rem);margin-bottom:.5rem}.hero-title{font-size:clamp(1.5rem,5vw,2.5rem);margin-bottom:.5rem;font-weight:700}.hero-subtitle{font-size:clamp(1rem,3vw,1.2rem);opacity:.9}.love-message h2{font-size:clamp(1.3rem,4vw,2rem);line-height:1.5;margin-bottom:1rem;text-align:center}.translate-btn{background:#ffffff26;border:2px solid rgba(255,255,255,.25);color:#fff;padding:.8rem 1.5rem;border-radius:15px;cursor:pointer;font-weight:600;transition:all .3s;display:block;margin:1rem auto 0}.countdown{text-align:center}.countdown h3{font-size:clamp(1.2rem,4vw,1.8rem);margin-bottom:.5rem}.countdown-subtitle{font-size:clamp(.9rem,3vw,1.1rem);opacity:.9;margin-bottom:1.5rem}.countdown-display{display:grid;grid-template-columns:repeat(auto-fit,minmax(70px,1fr));gap:1rem;max-width:600px;margin:0 auto}.countdown-item{display:flex;flex-direction:column;align-items:center}.countdown-number{font-size:clamp(2rem,6vw,3rem);font-weight:700}.countdown-label{font-size:clamp(.75rem,2vw,.9rem);opacity:.8;text-transform:uppercase;font-weight:600}.kiss-container{text-align:center;margin:2rem 0}.kiss-btn{width:clamp(80px,20vw,110px);height:clamp(80px,20vw,110px);border-radius:50%;background:linear-gradient(135deg,#14b8a6,#06b6d4);border:none;font-size:clamp(2.5rem,8vw,4rem);cursor:pointer;box-shadow:0 8px 30px #14b8a680;transition:all .3s}.kiss-message{margin-top:1rem;font-size:clamp(1rem,3vw,1.3rem);font-weight:600}.flashcard{position:relative;min-height:clamp(300px,60vw,450px);cursor:pointer;margin:1.5rem 0;transition:transform .2s}.flashcard-content{width:100%;height:100%;min-height:clamp(300px,60vw,450px);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2rem 1rem;text-align:center}.flashcard-badge{position:absolute;top:1rem;left:1rem;right:1rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;z-index:10;pointer-events:none}.difficulty-badge,.category-badge{padding:.5rem 1rem;border-radius:10px;font-size:.85rem;font-weight:600;background:#fff3;border:1px solid rgba(255,255,255,.3)}.flashcard-lang{font-size:clamp(.9rem,3vw,1.1rem);opacity:.8;margin-bottom:1rem}.flashcard-word,.flashcard-translation{font-size:clamp(2rem,8vw,4rem);font-weight:700;line-height:1.2;word-wrap:break-word;max-width:100%;margin-bottom:1rem}.flashcard-hint{margin-top:1.5rem;font-size:clamp(.85rem,2.5vw,1rem);opacity:.7}.learned-badge{margin-top:1rem;padding:.6rem 1rem;background:#4caf504d;border:1px solid rgba(76,175,80,.5);border-radius:10px;font-weight:600}.flashcard-controls{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;margin:1.5rem 0}.flashcard-btn{background:#ffffff26;border:2px solid rgba(255,255,255,.25);color:#fff;padding:.8rem 1.2rem;border-radius:12px;cursor:pointer;font-size:.95rem;font-weight:600;transition:all .3s;white-space:nowrap}.card-counter{font-weight:700;font-size:clamp(1rem,4vw,1.4rem);text-align:center}.action-buttons{display:grid;grid-template-columns:1fr;gap:1rem;margin:1.5rem 0}.action-btn{padding:1rem 2rem;border:none;border-radius:15px;font-size:clamp(.95rem,3vw,1.1rem);font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 4px 15px #0003}.learn-btn{background:linear-gradient(135deg,#10b981,#059669);color:#fff}.unlearn-btn{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.progress-percent{font-size:clamp(1.3rem,5vw,2rem);font-weight:700}.progress-bar{width:100%;height:12px;background:#fff3;border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#10b981,#14b8a6);transition:width 1s ease}.filter-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:.5rem;margin-bottom:1rem}.filter-btn{padding:.8rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);color:#fff;border-radius:10px;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .3s}.filter-btn.active{background:#ffffff40;border-color:#fff6}.category-select{width:100%;padding:.9rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);color:#fff;border-radius:10px;font-size:.95rem;cursor:pointer}.category-select option{background:#0d9488}.messages-container{max-height:400px;overflow-y:auto}.message-item{padding:1rem;background:#ffffff0d;border-radius:12px;margin-bottom:1rem;border:1px solid rgba(255,255,255,.1)}.message-text{line-height:1.7;margin-bottom:.8rem;font-size:clamp(.95rem,3vw,1.05rem)}.word-translation{color:#10b981;font-weight:600;font-size:.9em}.full-translation{background:#10b98126;border-left:3px solid #10b981;padding:1rem;margin:1rem 0;border-radius:8px;font-style:italic}.translate-full-btn{background:#ffffff1a;border:2px solid rgba(255,255,255,.2);color:#fff;padding:.7rem 1.2rem;border-radius:10px;cursor:pointer;margin-top:.8rem;transition:all .3s;font-weight:600}.message-form textarea{width:100%;padding:1rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);color:#fff;border-radius:12px;font-size:1rem;resize:vertical;margin-bottom:1rem;min-height:80px;font-family:inherit}.message-form textarea::placeholder{color:#ffffff80}.send-btn{width:100%;padding:1rem;background:linear-gradient(135deg,#14b8a6,#06b6d4);border:none;color:#fff;border-radius:12px;font-size:1.05rem;font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 4px 15px #14b8a64d}@media(min-width:768px){.container{padding:2rem;padding-top:100px;padding-bottom:120px}.countdown-display{grid-template-columns:repeat(4,1fr)}.action-buttons{grid-template-columns:1fr 1fr}}@media(min-width:1024px){.flashcard-controls,.action-buttons{max-width:600px;margin-left:auto;margin-right:auto}}.add-info{background:#10b98126;border:1px solid rgba(16,185,129,.3)}.add-form{padding:2rem 1.5rem}.form-section{margin-bottom:1.5rem;width:100%}.form-label{display:block;font-size:1rem;font-weight:600;margin-bottom:.7rem;opacity:.95}.form-input,.form-select{width:100%;padding:1rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:12px;color:#fff;font-size:1rem;font-family:inherit;transition:all .3s}.form-input:focus,.form-select:focus{outline:none;background:#ffffff26;border-color:#fff6}.form-input::placeholder{color:#ffffff80}.form-select option{background:#0d9488;color:#fff}.learner-buttons{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.learner-btn{padding:1rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:12px;color:#fff;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s;text-align:center}.learner-btn.active{background:#14b8a64d;border-color:#14b8a680;box-shadow:0 0 20px #14b8a64d}.swap-container{display:flex;justify-content:center;margin:1rem 0}.swap-btn{width:50px;height:50px;background:#ffffff26;border:2px solid rgba(255,255,255,.25);border-radius:50%;color:#fff;font-size:1.8rem;cursor:pointer;transition:all .3s;display:flex;align-items:center;justify-content:center}.swap-btn:hover{background:#ffffff40;transform:rotate(180deg)}.swap-btn:active{transform:scale(.9)}.difficulty-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem}.diff-btn{padding:.9rem;background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:12px;color:#fff;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s;text-align:center}.diff-btn.easy.active{background:#10b9814d;border-color:#10b98180}.diff-btn.medium.active{background:#f59e0b4d;border-color:#f59e0b80}.diff-btn.hard.active{background:#ef44444d;border-color:#ef444480}.submit-btn{width:100%;padding:1.2rem;background:linear-gradient(135deg,#14b8a6,#06b6d4);border:none;border-radius:15px;color:#fff;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 4px 15px #14b8a666;margin-top:1rem}.submit-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #14b8a680}.submit-btn:active{transform:scale(.98)}.success-message{margin-top:1rem;padding:1rem;background:#10b98133;border:1px solid rgba(16,185,129,.4);border-radius:12px;text-align:center;font-weight:600;font-size:1rem}.tips-container{background:#ffffff0d}.tips-container ul{margin:0}.tips-container li{margin-bottom:.5rem;font-size:.95rem;opacity:.9}@media(max-width:767px){.add-form{padding:1.5rem 1rem}.learner-buttons,.difficulty-buttons{grid-template-columns:1fr}.learner-btn,.diff-btn{padding:1.1rem}}.nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:calc(100% - 2rem);max-width:500px;display:flex;justify-content:space-evenly;align-items:flex-end;padding:.75rem .5rem;padding-bottom:max(.75rem,calc(env(safe-area-inset-bottom) + .5rem));background:#0d9488fa;backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px);box-shadow:0 -8px 32px #0000004d,0 0 0 1px #ffffff1a inset;border-radius:30px 30px 0 0;z-index:1000;border-top:2px solid rgba(255,255,255,.15)}.nav-btn{background:transparent;border:none;color:#ffffff80;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.3rem;padding:.6rem .8rem;border-radius:16px;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;min-width:65px;flex:1;max-width:80px}.nav-btn:before{content:"";position:absolute;inset:0;background:#fff0;border-radius:16px;transition:all .3s;z-index:-1}.nav-btn:active{transform:scale(.92)}.nav-btn.active{color:#fff}.nav-btn.active:before{background:#ffffff26;box-shadow:0 0 20px #ffffff1a}.nav-icon{font-size:1.6rem;transition:all .3s;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.nav-btn.active .nav-icon{transform:scale(1.15);filter:drop-shadow(0 4px 8px rgba(255,255,255,.3))}.nav-label{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;opacity:.8;transition:all .3s}.nav-btn.active .nav-label{opacity:1;font-weight:800}.nav-btn-center{position:relative;top:-20px;flex:0;min-width:70px;max-width:70px;padding:0;margin:0 .5rem}.nav-icon-large{width:70px;height:70px;background:linear-gradient(135deg,#14b8a6,#06b6d4);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.2rem;box-shadow:0 8px 24px #14b8a680,0 0 0 4px #ffffff26;border:3px solid rgba(255,255,255,.2);transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer;position:relative}.nav-icon-large:before{content:"";position:absolute;inset:-8px;background:radial-gradient(circle,rgba(20,184,166,.3) 0%,transparent 70%);border-radius:50%;z-index:-1;transition:all .3s}.nav-btn-center:active .nav-icon-large{transform:scale(.9)}.nav-btn-center.active .nav-icon-large{transform:scale(1.08);box-shadow:0 12px 32px #14b8a699,0 0 0 5px #ffffff40}.nav-btn-center.active .nav-icon-large:before{inset:-12px;background:radial-gradient(circle,rgba(20,184,166,.5) 0%,transparent 70%)}@media(max-width:767px){.nav{width:100%;max-width:100vw;padding:.6rem .3rem;padding-bottom:max(.6rem,calc(env(safe-area-inset-bottom) + .4rem));border-radius:25px 25px 0 0}.nav-btn{min-width:55px;max-width:65px;padding:.5rem;gap:.25rem}.nav-icon{font-size:1.4rem}.nav-label{font-size:.6rem}.nav-btn-center{top:-18px;min-width:65px;max-width:65px;margin:0 .25rem}.nav-icon-large{width:65px;height:65px;font-size:2rem;box-shadow:0 6px 20px #14b8a680,0 0 0 3px #ffffff26}}@media(min-width:768px){.nav{max-width:550px;padding:.9rem .75rem;border-radius:35px 35px 0 0}.nav-btn{min-width:75px;max-width:90px}.nav-icon{font-size:1.8rem}.nav-label{font-size:.7rem}.nav-btn-center{top:-22px;min-width:75px;max-width:75px}.nav-icon-large{width:75px;height:75px;font-size:2.4rem}}html,body{width:100%;overflow-x:hidden}body{display:flex;justify-content:center;align-items:flex-start}.app{width:100%;max-width:100vw;display:flex;flex-direction:column;align-items:center}.container{width:100%;display:flex;flex-direction:column;align-items:center;padding-left:1rem;padding-right:1rem}.page-content{width:100%;max-width:100%;display:flex;flex-direction:column;align-items:center}.page-content>*{width:100%;max-width:100%}.glass-container{width:calc(100% - 2rem);max-width:600px;margin-left:auto;margin-right:auto}@media(max-width:767px){.glass-container{width:calc(100% - 1rem)}}.home-page{padding:1rem;gap:1.2rem;display:flex;flex-direction:column;align-items:center}.home-header{text-align:center;margin-bottom:.5rem}.home-emoji{font-size:3.5rem;margin-bottom:.5rem;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.home-title{font-size:1.4rem;font-weight:700;margin-bottom:.3rem;line-height:1.3}.home-subtitle{font-size:1rem;opacity:.85;font-weight:400}.love-card{padding:1.5rem;text-align:center;position:relative}.love-text{font-size:1.3rem;font-weight:700;line-height:1.4;margin:0 0 1rem;letter-spacing:.3px}.love-translation{font-size:1.1rem;font-style:italic;opacity:.9;margin:1rem 0;padding-top:1rem;border-top:1px solid rgba(255,255,255,.2)}.toggle-btn{background:#ffffff26;border:2px solid rgba(255,255,255,.25);color:#fff;padding:.6rem 1.2rem;border-radius:20px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s;margin-top:.5rem}.toggle-btn:active{transform:scale(.95)}.countdown-card{padding:1.5rem}.countdown-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.2rem}.countdown-icon{font-size:2.5rem}.countdown-title{font-size:1.2rem;font-weight:700;margin-bottom:.2rem}.countdown-subtitle{font-size:.85rem;opacity:.8;margin:0}.countdown-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem}.countdown-box{background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:.8rem .5rem;text-align:center}.countdown-value{font-size:1.8rem;font-weight:700;line-height:1;margin-bottom:.3rem}.countdown-unit{font-size:.7rem;text-transform:uppercase;opacity:.8;font-weight:600;letter-spacing:.5px}.kiss-section{display:flex;flex-direction:column;align-items:center;gap:1rem;margin-top:.5rem}.kiss-button{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#14b8a6,#06b6d4);border:none;font-size:3rem;cursor:pointer;box-shadow:0 8px 24px #14b8a666;transition:all .3s;display:flex;align-items:center;justify-content:center}.kiss-button:active{transform:scale(.9)}.kiss-message{font-size:1.1rem;font-weight:600;text-align:center;margin:0;animation:fadeIn .3s}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:767px){.home-page{padding:.8rem;gap:1rem}.love-card,.countdown-card{padding:1.2rem}.countdown-grid{grid-template-columns:repeat(2,1fr);gap:.6rem}.countdown-box{padding:1rem .6rem}.countdown-value{font-size:2rem}}@media(min-width:768px){.home-emoji{font-size:4.5rem}.home-title{font-size:1.8rem}.love-text{font-size:1.6rem}.kiss-button{width:100px;height:100px;font-size:3.5rem}}