:root{--primary-color:#6c63ff;--primary-hover:#5a52e0;--bg-color:#f5f7fa;--text-color:#333;--border-color:#e0e0e0;--card-bg:#ffffff;--secondary-bg:#f0f2f5;--accent-color:#ff6b84;--success-color:#4caf50;--info-color:#2196f3;--warning-color:#ff9800;--error-color:#f44336;--transition-speed:0.3s;--shadow:0 8px 30px rgba(0,0,0,0.08);--radius:16px;--header-height:70px;--content-padding:25px;--section-gap:35px;--element-gap:20px;--animation-duration:0.5s}.dark-theme{--primary-color:#8c7fff;--primary-hover:#7a6dff;--bg-color:#0f1624;--text-color:#f0f0f0;--border-color:#333945;--card-bg:#1a202c;--secondary-bg:#252d3c;--shadow:0 8px 30px rgba(0,0,0,0.25)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Roboto,sans-serif;background-color:var(--bg-color);color:var(--text-color);transition:background-color var(--transition-speed),color var(--transition-speed);min-height:100vh}.app-container{max-width:100%;margin:0;padding:0;display:grid;grid-template-rows:var(--header-height) auto 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15px rgba(0,0,0,.05)}.language-btn:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 6px 20px rgba(0,0,0,.1)}.flag-icon{width:28px;height:21px;display:inline-block;background-size:cover;background-position:50%;border-radius:4px;box-shadow:0 2px 5px rgba(0,0,0,.2)}.swap-btn{background:linear-gradient(45deg,var(--primary-color),var(--accent-color));border:none;border-radius:50%;width:50px;height:50px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .4s cubic-bezier(.175,.885,.32,1.275);color:white;box-shadow:0 4px 15px rgba(108,99,255,.3)}.swap-btn:hover{transform:rotate(180deg) scale(1.1);box-shadow:0 6px 20px rgba(108,99,255,.5)}main{padding:0 var(--content-padding);display:flex;flex-direction:column;gap:var(--section-gap);width:100%;box-sizing:border-box}.translation-area{display:grid;grid-template-columns:1fr;gap:var(--section-gap);margin-bottom:0;animation:fadeIn var(--animation-duration) cubic-bezier(.25,.46,.45,.94)}@keyframes fadeIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.input-container,.output-container{position:relative;background-color:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:all .4s cubic-bezier(.25,.46,.45,.94);display:flex;flex-direction:column;min-height:250px}.input-container:hover,.output-container:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(0,0,0,.12)}.detect-language textarea,.input-container textarea{border:none;resize:none;outline:none;font-family:Roboto,sans-serif}.detect-language textarea,.input-container textarea,.translation-output{width:100%;min-height:200px;padding:var(--content-padding);background-color:transparent;color:var(--text-color);font-size:1.1rem;flex:1;line-height:1.6}.translation-output{overflow-y:auto;transition:opacity .3s ease}.formatted-translation{white-space:pre-wrap;font-family:Roboto,sans-serif;line-height:1.6}.text-controls{display:flex;justify-content:flex-end;padding:15px var(--content-padding);background-color:var(--secondary-bg);border-top:1px solid var(--border-color);gap:18px;flex-wrap:wrap}.control-btn{background:none;border:none;color:var(--text-color);font-size:.95rem;cursor:pointer;padding:10px 16px;border-radius:var(--radius);transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;align-items:center;gap:10px}.control-btn:hover{transform:translateY(-4px) scale(1.02);color:white;background-color:var(--primary-color)}.control-btn i{font-size:1.1rem}.additional-features{background-color:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:0;animation:slideUp var(--animation-duration) cubic-bezier(.25,.46,.45,.94)}@keyframes 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(max-width:991px){:root{--content-padding:20px;--section-gap:25px}.app-container{gap:var(--section-gap);max-width:100%;overflow-x:hidden}.translation-area{grid-template-columns:1fr;gap:var(--element-gap)}main{padding:0 var(--content-padding)}.language-controls,main{width:100%;box-sizing:border-box}.language-controls{margin:0 auto var(--section-gap) auto}}@media (max-width:767px){:root{--header-height:60px;--radius:12px;--content-padding:18px;--section-gap:20px;--element-gap:15px}.app-container{padding:0;gap:var(--section-gap);width:100vw;max-width:100vw;overflow-x:hidden}body,html{overflow-x:hidden}body,header,html{width:100%;max-width:100%}header{padding:0 20px;margin:0;left:0;right:0}.language-controls{padding:var(--content-padding);width:100%;margin:0 auto}.language-selector{flex-direction:column;gap:var(--element-gap);align-items:stretch}.language-btn{width:100%;min-width:unset;padding:14px 20px}.input-container textarea,.translation-output{min-height:160px;padding:var(--content-padding);font-size:1rem}.text-controls{justify-content:center;padding:12px 15px;gap:12px}.tab-panel{padding:var(--content-padding)}.history-item,.saved-item{padding:18px;margin-bottom:var(--element-gap)}.export-controls{border-left:none;padding-left:0;gap:8px}}@media (max-width:480px){:root{--content-padding:15px;--section-gap:15px;--element-gap:12px}.app-container{gap:var(--section-gap);padding-bottom:60px}.logo h1{font-size:1.2rem}.theme-toggle{width:40px;height:40px;font-size:1.3rem}.feature-tabs{flex-wrap:nowrap;overflow-x:auto;padding:0 5px}.tab-btn{white-space:nowrap;flex:0 0 auto;min-width:100px;padding:15px 12px}.control-btn{padding:8px 12px}.control-btn span{display:none}.control-btn i{font-size:1.1rem}.text-controls{justify-content:space-around;padding:10px}.language-controls{margin:0 auto;padding:var(--content-padding);width:100%;box-sizing:border-box}main{padding:0 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