@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap";:root{--color-bg: #FFFFFF;--color-surface: #FFFFFF;--color-surface-hover: #F8F9FE;--color-text-main: #2D3436;--color-text-sub: #A4B0BE;--color-text-light: #DFE4EA;--color-primary: #6C5CE7;--color-primary-light: #A29BFE;--color-primary-fade: rgba(108, 92, 231, .08);--color-secondary: #00B894;--color-secondary-fade: rgba(0, 184, 148, .1);--color-accent-pink: #FD79A8;--color-accent-yellow: #FDCB6E;--color-accent-orange: #E17055;--color-accent-blue: #74B9FF;--color-border: #F1F2F6;--color-border-hover: #DFE6E9;--shadow-sm: none;--shadow-md: none;--shadow-lg: none;--shadow-xl: none;--shadow-primary: none;--shadow-float: none;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-xxl: 48px;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 48px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1);--border-width-card: 2px;--border-width-thin: 1px}@media(max-width:767px){:root{--mobile-nav-bar-height: 64px;--mobile-bottom-spacing: calc(var(--mobile-nav-bar-height) + env(safe-area-inset-bottom) + 20px)}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;outline:none}body{margin:0;padding:0;font-family:Nunito,sans-serif;background-color:var(--color-bg);color:var(--color-text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,buttons,input{font-family:Nunito,sans-serif}h1{letter-spacing:-.02em}h2{letter-spacing:-.01em}.flex-center{display:flex;align-items:center;justify-content:center}.flex-col{display:flex;flex-direction:column}.card{background:var(--color-surface);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}button{border:none;background:none;font-family:inherit;cursor:pointer;-webkit-user-select:none;user-select:none}.btn-icon{width:44px;height:44px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:var(--color-text-main);transition:all var(--transition-fast)}.btn-icon:hover{background-color:var(--color-surface-hover);transform:translateY(-1px)}.btn-icon:active{transform:scale(.95)}.no-scrollbar::-webkit-scrollbar{display:none}.no-scrollbar{-ms-overflow-style:none;scrollbar-width:none}.fb-feedback-widget-feedback-button{background:#0000!important;color:#777!important;box-shadow:none!important;border:1px solid #8e8e8e7b!important}.modal-overlay{position:fixed;inset:0;background:#2d343666;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--spacing-lg)}.modal-card{background:var(--color-surface);border-radius:var(--radius-lg);border:var(--border-width-card) solid var(--color-border);width:100%;max-width:400px;max-height:90vh;overflow:hidden;display:flex;flex-direction:column}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg) var(--spacing-xl);border-bottom:1px solid var(--color-border)}.modal-title{font-size:20px;font-weight:800;color:var(--color-text-main);margin:0;letter-spacing:-.3px}.modal-close{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-full);color:var(--color-text-sub);transition:all var(--transition-fast);cursor:pointer;background:transparent;border:none}.modal-close:hover{background:var(--color-surface-hover);color:var(--color-text-main)}.modal-content{padding:var(--spacing-xl);overflow-y:auto}.dropdown-menu-portal{background:var(--color-surface);border:var(--border-width-card) solid var(--color-border);border-radius:var(--radius-md);box-shadow:0 4px 12px #0000001a}.dropdown-menu-title{padding:10px 14px 6px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-sub)}.dropdown-menu-list{list-style:none;margin:0;padding:var(--spacing-xs);max-height:min(240px,calc(100vh - 80px));overflow-y:auto}.dropdown-option-wrapper{position:relative;display:flex;align-items:center;gap:4px}.dropdown-option{flex:1;display:flex;align-items:center;gap:10px;padding:12px 14px;background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;font-family:Nunito,sans-serif;font-size:15px;font-weight:600;color:var(--color-text-main);transition:all var(--transition-fast);text-align:left}.dropdown-option:hover{background:var(--color-surface-hover)}.dropdown-option.selected{background:var(--color-primary-fade);color:var(--color-primary)}.dropdown-left-icon{display:flex;align-items:center;color:var(--color-text-sub);opacity:.7}.dropdown-option-content{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:2px}.dropdown-option-label{flex:1}.dropdown-option-description{font-size:12px;font-weight:500;color:var(--color-text-sub);opacity:.8}.dropdown-option.selected .dropdown-option-description{color:var(--color-primary);opacity:.7}.dropdown-option.has-description{padding:10px 14px;align-items:flex-start}.dropdown-option.has-description .dropdown-icon{margin-top:2px}.dropdown-menu-list.with-description{max-height:min(320px,calc(100vh - 80px))}.dropdown-check{color:var(--color-primary);flex-shrink:0}.dropdown-option-actions{display:flex;gap:4px;flex-shrink:0}.dropdown-action-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;color:var(--color-text-sub);transition:all var(--transition-fast)}.dropdown-action-btn:hover{background:var(--color-surface-hover);color:var(--color-text-main)}.dropdown-action-btn.pin-btn:hover{color:var(--color-primary)}.dropdown-action-btn.delete-btn:hover{color:#e74c3c}.dropdown-option-actions.pinned-indicator{opacity:.7}.dropdown-option-actions.pinned-indicator .dropdown-action-btn.pin-btn.pinned{color:var(--color-primary)}.dropdown-option-actions.pinned-indicator .dropdown-action-btn.pin-btn.pinned:hover{opacity:.8}.dropdown-container{position:relative;width:100%}.dropdown-label{display:block;font-size:14px;font-weight:700;color:var(--color-text-sub);margin-bottom:var(--spacing-sm);text-transform:uppercase;letter-spacing:.5px}.dropdown-trigger{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--color-surface);border:var(--border-width-card) solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);font-family:Nunito,sans-serif;font-size:16px;font-weight:600;color:var(--color-text-main)}.dropdown-trigger:hover{border-color:var(--color-border-hover);background:var(--color-surface-hover)}.dropdown-trigger.open{border-color:var(--color-primary-light);background:var(--color-surface-hover)}.dropdown-value{display:flex;align-items:center;gap:10px}.dropdown-placeholder{color:var(--color-text-sub)}.dropdown-icon{font-size:20px;line-height:1}.dropdown-chevron{color:var(--color-text-sub);transition:transform var(--transition-fast);flex-shrink:0}.dropdown-chevron.open{transform:rotate(180deg)}.dropdown-container.disabled{opacity:.7}.dropdown-trigger.disabled{cursor:not-allowed;background:var(--color-surface-hover)}.dropdown-trigger.disabled:hover{border-color:var(--color-border);background:var(--color-surface-hover)}.dropdown-lock{color:var(--color-text-sub);opacity:.6}.add-language-form{display:flex;flex-direction:column;gap:var(--spacing-lg)}.add-language-btn{width:100%;padding:16px 24px;font-size:16px;font-family:Nunito,sans-serif;font-weight:800;color:#fff;background-color:var(--color-primary);border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);text-transform:uppercase;letter-spacing:.5px;margin-top:var(--spacing-sm)}.add-language-btn:hover:not(:disabled){background-color:var(--color-primary-light);transform:translateY(-2px)}.add-language-btn:active:not(:disabled){transform:translateY(0) scale(.98)}.add-language-btn:disabled{opacity:.5;cursor:not-allowed}.nav-container{position:fixed;bottom:0;left:0;right:0;background:#ffffffe6;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--color-border);padding-bottom:env(safe-area-inset-bottom);z-index:100;transition:all .3s ease}.nav-logo,.nav-xp-counter{display:none}.nav-content{display:flex;justify-content:space-around;align-items:center;height:64px;max-width:600px;margin:0 auto}.nav-item{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--color-text-sub);cursor:pointer;padding:8px;flex:1;transition:color .3s cubic-bezier(.4,0,.2,1)}.nav-item:active{transform:scale(.92)}.nav-item.active{color:var(--color-primary)}.icon-wrapper{position:relative;padding:8px 16px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center}.nav-item.active .icon-wrapper:before{content:"";position:absolute;inset:0;background-color:var(--color-primary-fade);border-radius:var(--radius-full);animation:scaleIn .3s cubic-bezier(.175,.885,.32,1.275)}@keyframes scaleIn{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.nav-label{font-size:11px;font-weight:700;margin-top:4px}.active-indicator{position:absolute;inset:0;background:var(--color-primary-fade);border-radius:var(--radius-full);z-index:-1}@media(min-width:768px){.nav-container{bottom:auto;top:0;right:auto;width:260px;height:100vh;background:var(--color-bg);border-top:none;border-right:1px solid var(--color-border);padding-bottom:0;display:flex;flex-direction:column}.nav-logo{display:flex;align-items:center;gap:12px;padding:24px 20px 20px;cursor:pointer;background:none;border:none;width:100%;text-align:left;transition:opacity .2s ease}.nav-logo:hover{opacity:.7}.nav-logo:active{transform:scale(.98)}.nav-logo .logo-icon{width:40px;height:40px}.nav-logo .logo-text{font-size:26px;font-weight:800;color:var(--color-text-main);letter-spacing:-.5px}.nav-xp-counter{display:flex;align-items:center;gap:16px;padding:20px 20px 16px;margin:auto 20px 20px;border-top:1px solid var(--color-border)}.nav-xp-counter .xp-icon{color:var(--color-accent-yellow);flex-shrink:0}.nav-xp-counter .xp-number{font-size:20px;font-weight:700;color:var(--color-primary);line-height:1}.nav-xp-counter .xp-label{font-size:11px;font-weight:600;text-transform:uppercase;color:var(--color-text-sub);letter-spacing:.5px}.nav-content{flex-direction:column;justify-content:flex-start;height:auto;padding-top:8px;padding-left:20px;padding-right:20px;gap:12px;align-items:stretch;margin:0;max-width:none}.nav-item{flex-direction:row;justify-content:flex-start;padding:16px 20px;gap:16px;flex:initial;border-radius:var(--radius-md);transition:all .2s ease}.nav-item:hover{background-color:var(--color-surface-hover);color:var(--color-text-main)}.nav-item.active{background-color:var(--color-primary-fade);color:var(--color-primary)}.nav-item.active .icon-wrapper:before{display:none}.nav-label{font-size:16px;margin-top:0;font-weight:800}.icon-wrapper{padding:0}}.xp-animation{position:fixed;z-index:9999;pointer-events:none}.xp-tooltip{position:relative;padding:6px 12px;border-radius:var(--radius-sm);font-family:Nunito,sans-serif;font-weight:600;font-size:13px;white-space:nowrap}.xp-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent}.xp-animation.positive .xp-tooltip{background:#fdcb6ef2;color:#333;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.xp-animation.positive .xp-tooltip:after{border-top:5px solid rgba(253,203,110,.95)}.xp-animation.negative .xp-tooltip{background:#e17055e6;color:#fff;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.xp-animation.negative .xp-tooltip:after{border-top:5px solid rgba(225,112,85,.9)}.learning-card-container{background:var(--color-surface);border-radius:var(--radius-md);box-shadow:none;display:flex;overflow:hidden;position:relative;transition:all .2s cubic-bezier(.25,.46,.45,.94);border:var(--border-width-card) solid var(--color-border);width:100%}.learning-card-container:hover{transform:translateY(-2px);box-shadow:none;border-color:var(--color-border-hover)}.learning-card-body{flex:1;padding:16px 20px;display:flex;flex-direction:column}.learning-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.card-type-wrapper{display:flex;align-items:center;gap:6px}.card-type-label{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;line-height:1}.card-actions{display:flex;gap:8px}.icon-action-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-full);color:var(--color-text-sub);transition:all .2s;cursor:pointer;background:transparent;border:none}.icon-action-btn:hover{background-color:var(--color-surface-hover);color:var(--color-primary)}.icon-action-btn:active{transform:scale(.95)}.icon-action-btn:disabled{cursor:not-allowed;opacity:.6}.icon-action-btn.playing{color:var(--color-primary)}.icon-action-btn.card-export-btn{opacity:0;transition:opacity .2s ease}.learning-card-container:hover .card-export-btn{opacity:1}.learning-card-content{display:flex;flex-direction:column}.card-title{font-family:Nunito,sans-serif;font-size:19px;font-weight:900;color:var(--color-text-main);margin:0 0 4px;line-height:1.3}.card-title-meta{font-weight:600;color:var(--color-text-sub);font-size:.85em}.card-title-pronunciation{font-weight:500;color:var(--color-text-sub);font-size:.75em;opacity:.8}.card-subtitle{font-size:14px;color:var(--color-text-sub);font-weight:600;margin:0 0 16px}.card-divider{height:1px;background:linear-gradient(to right,var(--color-border) 50%,transparent 100%);width:100%;opacity:.5}.card-meaning{font-size:15px;color:var(--color-text-main);line-height:1.5;margin:0;font-weight:600}.learning-card-container.compact{cursor:pointer}.learning-card-container.compact .learning-card-body{padding:12px 16px}.learning-card-container.compact .learning-card-header{margin-bottom:8px}.learning-card-container.compact .card-title{font-size:16px;margin-bottom:2px}.learning-card-container.compact .card-meaning{font-size:13px;color:var(--color-text-sub)}.learning-card-container.compact .card-meaning p{margin:0}.card-meta-inline{display:flex;align-items:center;gap:8px;margin-right:4px;font-size:11px;font-weight:600}.card-meta-inline .card-due{color:var(--color-primary)}.card-meta-inline .card-state{color:var(--color-text-sub);text-transform:uppercase;letter-spacing:.3px}.icon-action-btn.delete-btn:hover{color:var(--color-error, #e53935);background-color:#e539351a}.quiz-selection{margin:16px 0;padding:20px;background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border)}.quiz-question{font-size:15px;line-height:1.6;color:var(--color-text-main);margin-bottom:16px;white-space:pre-wrap}.quiz-options{display:flex;flex-direction:column;gap:10px}.quiz-option{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:var(--radius-md);border:none;border-bottom:4px solid #E5E5E5;background:#fff;color:var(--color-text-main);font-size:15px;font-weight:500;cursor:pointer;transition:all .15s;text-align:left;box-shadow:0 2px 8px #0000000a}.quiz-option:hover:not(:disabled){background:#f8f9fa;border-bottom-color:#d0d0d0}.quiz-option:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}.quiz-option-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--color-surface-hover);color:var(--color-text-sub);font-size:13px;font-weight:600;flex-shrink:0}.quiz-option-text{flex:1}.quiz-option.correct{background:#58cc02;border-bottom-color:#490;color:#fff}.quiz-option.correct .quiz-option-number{background:#fff3;color:#fff}.quiz-option.wrong{background:#ff4b4b;border-bottom-color:#d93636;color:#fff}.quiz-option.wrong .quiz-option-number{background:#fff3;color:#fff}.quiz-option.shake{animation:quizShake .4s ease-in-out}@keyframes quizShake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-6px)}80%{transform:translate(6px)}}.quiz-option.revealed{background:#1cb0f6;border-bottom-color:#1899d6;color:#fff}.quiz-option.revealed .quiz-option-number{background:#fff3;color:#fff}.quiz-option.disabled{opacity:.5;cursor:not-allowed}.quiz-selection.disabled{opacity:.7;pointer-events:none}.quiz-selection.disabled .quiz-option{cursor:default}.quiz-hint{margin-top:16px;padding:12px 16px;background:#fff8e6;border-radius:var(--radius-md);font-size:14px;color:#8b6914;display:flex;align-items:flex-start;gap:8px}.quiz-hint-icon{flex-shrink:0}.quiz-revealed-message{margin-top:12px;font-size:14px;color:var(--color-text-sub);text-align:center}.quiz-reset-btn{margin-top:16px;padding:10px 20px;border-radius:var(--radius-md);border:none;border-bottom:3px solid #D0D0D0;background:#f0f0f0;color:var(--color-text-main);font-size:14px;font-weight:600;cursor:pointer;transition:all .15s;display:block;margin-left:auto;margin-right:auto}.quiz-reset-btn:hover{background:#e8e8e8;border-bottom-color:silver}.quiz-reset-btn:active{transform:translateY(2px);border-bottom-width:1px}.course-expand-sentinel{height:0;width:100%;pointer-events:none}.course-expand-placeholder{height:0;margin:0}.course-expand-container{background:var(--color-surface);border-radius:var(--radius-md);border:var(--border-width-card) solid var(--color-border);overflow:hidden;margin:12px 0;transition:all .2s cubic-bezier(.25,.46,.45,.94)}.course-expand-container.is-sticky-portal{box-shadow:0 4px 12px #00000026;margin:0;max-height:calc(100vh - 80px);display:flex;flex-direction:column}.course-expand-container.is-sticky-portal .course-expand-content{overflow-y:auto;flex:1;min-height:0}.course-expand-container:hover{border-color:var(--color-border-hover)}.course-expand-header{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:transparent;border:none;cursor:pointer;transition:background-color .2s;color:var(--color-text)}.course-expand-header:hover{background:var(--color-hover)}.course-expand-title{display:flex;align-items:center;gap:8px;flex:1}.course-expand-icon{color:var(--header-color, var(--color-primary));flex-shrink:0}.course-expand-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--header-color, var(--color-primary))}.course-expand-count{font-size:11px;font-weight:500;color:var(--color-text-secondary);opacity:.7}.course-expand-content{padding:0 18px 16px;border-top:1px solid var(--color-border);animation:slideDown .2s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.course-expand-list{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-direction:column;gap:4px}.course-expand-item{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;line-height:1.5;border-radius:var(--radius-sm);transition:background-color .15s ease;position:relative}.course-expand-item.hovered{background-color:#00000008}.course-expand-number{font-size:12px;font-weight:700;color:var(--color-primary);min-width:32px;flex-shrink:0;font-variant-numeric:tabular-nums}.course-expand-text{flex:1;font-size:14px;color:var(--color-text);white-space:normal;word-wrap:break-word;overflow-wrap:break-word;min-width:0}.course-expand-text strong{font-weight:600;color:var(--color-text)}.course-expand-description{font-weight:400;color:var(--color-text-secondary)}.course-expand-start-btn{flex-shrink:0;padding:4px 12px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:#fff;background:#10b981;border:none;border-radius:4px;cursor:pointer;box-shadow:0 2px #047857,0 3px 4px #00000026;transition:all .1s ease;margin-left:auto;align-self:center}.course-expand-start-btn:hover:not(:disabled){background:#34d399;transform:translateY(-1px);box-shadow:0 3px #047857,0 4px 6px #0000002e}.course-expand-start-btn:active:not(:disabled){transform:translateY(2px);box-shadow:0 0 #047857,0 1px 2px #0000001f}.course-expand-start-btn:disabled{opacity:.5;cursor:not-allowed}.course-expand-config{display:flex;flex-direction:column;gap:8px;margin-top:12px}.course-expand-config-line{font-size:13px;line-height:1.6;color:var(--color-text);padding:6px 12px;background:var(--color-hover);border-radius:var(--radius-sm);font-family:SF Mono,Monaco,Consolas,monospace}.selection-popover{display:flex;align-items:center;gap:4px;padding:6px 8px;background:#fff;border:1px solid var(--color-border);border-radius:8px;box-shadow:0 4px 12px #00000026;pointer-events:auto}.popover-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;background:transparent;border:none;color:var(--color-text-sub);font-size:13px;cursor:pointer;border-radius:4px;white-space:nowrap;transition:all .15s}.popover-btn:hover:not(:disabled){background:var(--color-surface-hover);color:var(--color-text)}.popover-btn.dict-btn:hover:not(:disabled){background:#3498db26;color:#3498db}.popover-btn.grammar-btn:hover:not(:disabled){background:#9b59b626;color:#9b59b6}.popover-btn.native-btn:hover:not(:disabled){background:#f5a62326;color:#f5a623}.popover-btn:disabled{opacity:.5;cursor:not-allowed}.popover-btn svg{flex-shrink:0}.topup-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid #f0f0f0}.topup-item:last-child{border-bottom:none}.topup-icon{color:#666;padding-top:2px;flex-shrink:0}.topup-icon-purchase{color:#3b82f6}.topup-icon-grant{color:#10b981}.topup-details{flex:1;min-width:0}.topup-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:4px;gap:12px}.topup-credits{font-weight:600;color:#22c55e;font-size:15px}.topup-date{color:#999;font-size:13px;white-space:nowrap}.topup-meta{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:#666}.topup-source{font-weight:500;color:#333}.topup-amount{color:#666}.topup-app{text-transform:capitalize;color:#999;padding:0 6px;background:#f5f5f5;border-radius:3px;font-size:12px}.topup-grant-type{text-transform:capitalize;color:#10b981;font-weight:500}.topup-reason{margin-top:6px;font-size:13px;color:#666;font-style:italic;padding-left:12px;border-left:2px solid #e0e0e0;line-height:1.4}.usage-topup-content{overflow-y:auto}.topup-list{overflow-y:auto;padding:0 4px}.topup-list::-webkit-scrollbar{width:6px}.topup-list::-webkit-scrollbar-track{background:#f5f5f5;border-radius:3px}.topup-list::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px}.topup-list::-webkit-scrollbar-thumb:hover{background:#999}.usage-modal-content{padding:0}.usage-tabs{display:flex;gap:0;margin-bottom:var(--spacing-lg);margin-left:calc(0px - var(--spacing-xl));margin-right:calc(0px - var(--spacing-xl));border-bottom:2px solid var(--color-border);padding-bottom:0;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;-ms-overflow-style:none}.usage-tabs::-webkit-scrollbar{display:none}.usage-tab{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);background:none;border:none;border-radius:var(--radius-md);color:var(--color-text-sub);font-family:Nunito,sans-serif;font-size:14px;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.usage-tab:hover,.usage-tab.active{color:var(--color-primary);background:var(--color-primary-fade)}.usage-loading{display:flex;justify-content:center;padding:var(--spacing-xxl);color:var(--color-text-sub)}.usage-empty{text-align:center;padding:var(--spacing-xl);color:var(--color-text-sub)}.usage-empty-hint{font-size:13px;color:var(--color-text-light);margin-top:var(--spacing-sm)}.usage-balance-content{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-lg)}.negative-balance-alert{display:flex;align-items:center;gap:var(--spacing-sm);width:100%;padding:var(--spacing-md);background:#fef2f2;border:2px solid #EF4444;border-radius:var(--radius-md);margin-bottom:var(--spacing-sm)}.alert-icon{font-size:20px;line-height:1;flex-shrink:0}.alert-text{display:flex;flex-direction:column;gap:2px;flex:1}.alert-title{font-size:14px;font-weight:700;color:#991b1b;font-family:Nunito,sans-serif}.alert-subtitle{font-size:12px;font-weight:500;color:#b91c1c;font-family:Nunito,sans-serif}.usage-balance-display{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.balance-value{font-size:48px;font-weight:800;color:var(--color-primary);line-height:1}.balance-label{font-size:14px;font-weight:600;color:var(--color-text-sub);text-transform:uppercase;letter-spacing:.05em}.usage-hint{font-size:13px;color:var(--color-text-sub);text-align:center;max-width:280px;line-height:1.5}.currency-selector{display:flex;gap:var(--spacing-sm);padding:var(--spacing-xs);background:var(--color-surface-hover);border-radius:var(--radius-lg)}.currency-option{flex:1;padding:var(--spacing-sm) var(--spacing-md);background:none;border:none;border-radius:var(--radius-md);font-family:Nunito,sans-serif;cursor:pointer;transition:all var(--transition-fast);display:flex;flex-direction:column;align-items:center;gap:4px}.currency-option:hover{background:#ffffff80}.currency-option.active{background:var(--color-bg)}.currency-symbol{font-size:13px;font-weight:700;color:var(--color-text-main);font-family:Nunito,sans-serif}.currency-option.active .currency-symbol{color:var(--color-primary)}.currency-methods{font-size:10px;font-weight:500;color:var(--color-text-sub);text-transform:uppercase;letter-spacing:.5px;font-family:Nunito,sans-serif}.currency-option.active .currency-methods{color:var(--color-primary);opacity:.7}.topup-options{display:flex;flex-direction:column;gap:var(--spacing-sm);width:100%;max-width:280px}.topup-btn{width:100%;padding:var(--spacing-md);background:var(--color-bg);border:2px solid var(--color-primary);border-radius:var(--radius-lg);font-family:Nunito,sans-serif;font-size:15px;font-weight:700;color:var(--color-primary);cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.topup-btn:hover:not(:disabled){background:var(--color-primary);color:#fff}.topup-btn:disabled{opacity:.6;cursor:not-allowed}.usage-history-content{max-height:400px;overflow-y:auto}.week-summary{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:linear-gradient(135deg,var(--color-primary-fade) 0%,rgba(108,92,231,.03) 100%);border:2px solid var(--color-primary-light);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg)}.week-summary-left{display:flex;flex-direction:column;gap:4px}.week-label{font-size:12px;font-weight:600;color:var(--color-text-sub);text-transform:uppercase;letter-spacing:.05em}.week-total{font-size:20px;font-weight:800;color:var(--color-primary)}.sparkline{display:flex;align-items:flex-end;gap:4px;height:40px}.sparkline-bar{width:6px;min-height:2px;background:var(--color-primary);border-radius:3px 3px 0 0;transition:all var(--transition-fast)}.sparkline-bar:hover{background:var(--color-secondary);transform:scaleY(1.1)}.daily-list{display:flex;flex-direction:column}.daily-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md) var(--spacing-sm);border-bottom:1px solid var(--color-border);border-radius:var(--radius-md);transition:background var(--transition-fast)}.daily-item:hover{background:var(--color-surface-hover)}.daily-item:last-child{border-bottom:none}.daily-date{font-size:14px;font-weight:600;color:var(--color-text-main)}.daily-credits{font-size:16px;font-weight:800;color:var(--color-accent-orange)}.tag-pool-input{display:flex;flex-direction:column;gap:8px}.tag-pool-label{font-size:13px;font-weight:500;color:var(--color-text-sub);margin-bottom:2px}.tag-pool-selected{display:flex;flex-wrap:wrap;gap:6px;padding:8px;background:var(--color-surface-hover);border-radius:var(--radius-md);min-height:36px}.tag-selected{display:inline-flex;align-items:center;gap:4px;padding:4px 8px;background:var(--color-primary);color:#fff;border-radius:var(--radius-sm);font-size:12px;cursor:pointer;transition:background .15s,opacity .15s}.tag-selected:hover{opacity:.85}.tag-selected.custom{background:#6366f1}.tag-selected svg{opacity:.7}.tag-pool-presets{display:flex;flex-wrap:wrap;gap:6px}.tag-preset{padding:5px 10px;background:var(--color-surface-hover);border:1px solid var(--color-border);border-radius:var(--radius-pill);font-size:12px;color:var(--color-text-sub);cursor:pointer;transition:all .15s}.tag-preset:hover{background:var(--color-surface-active);border-color:var(--color-border-strong)}.tag-preset.selected{background:rgba(var(--color-primary-rgb),.15);border-color:var(--color-primary);color:var(--color-primary)}.tag-pool-custom{display:flex;gap:6px;margin-top:4px}.tag-pool-input-field{flex:1;padding:6px 10px;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:12px;color:var(--color-text);background:var(--color-surface);transition:border-color .15s}.tag-pool-input-field:focus{outline:none;border-color:var(--color-primary)}.tag-pool-input-field::placeholder{color:var(--color-text-muted)}.tag-pool-add-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-text-sub);cursor:pointer;transition:all .15s}.tag-pool-add-btn:hover:not(:disabled){background:var(--color-surface-hover);border-color:var(--color-primary);color:var(--color-primary)}.tag-pool-add-btn:disabled{opacity:.4;cursor:not-allowed}.course-config-form{display:flex;flex-direction:column;gap:20px;padding:4px 0}.course-config-reset-btn{margin-top:8px;padding:10px 16px;background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:13px;color:var(--color-text-sub);cursor:pointer;transition:all .15s}.course-config-reset-btn:hover{background:var(--color-surface-hover);border-color:var(--color-text-sub)}.share-modal-overlay{position:fixed;inset:0;background:#00000080;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:10000;padding:20px}.share-modal{background:var(--color-bg);border-radius:var(--radius-lg);width:100%;max-width:480px;padding:28px;position:relative;box-shadow:0 20px 60px #00000040}.share-modal-close{position:absolute;top:16px;right:16px;background:transparent;border:none;color:var(--color-text-sub);cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center;transition:color .15s}.share-modal-close:hover{color:var(--color-text)}.share-modal-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}.share-modal-header svg{color:var(--color-text-sub)}.share-modal-header h2{margin:0;font-size:20px;font-weight:700;color:var(--color-text)}.share-modal-loading{display:flex;align-items:center;justify-content:center;gap:8px;padding:24px;color:var(--color-text-sub)}.share-modal-warning{display:flex;gap:12px;padding:14px;background:#fff3cd;border:1px solid #ffc107;border-radius:var(--radius-md);margin-bottom:20px}.share-modal-warning svg{flex-shrink:0;color:#856404;margin-top:2px}.share-modal-warning-text{font-size:14px;line-height:1.5;color:#856404}.share-modal-warning-text strong{font-weight:600}.share-modal-error{padding:12px;background:#fee;border:1px solid #fcc;border-radius:var(--radius-md);color:#c00;font-size:14px;margin-bottom:16px}.share-modal-btn{width:100%;padding:14px 24px;background:#111;color:#fff;border:none;border-radius:var(--radius-md);font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:opacity .15s}.share-modal-btn:hover:not(:disabled){opacity:.85}.share-modal-btn:disabled{opacity:.6;cursor:not-allowed}.share-modal-success{margin-bottom:16px}.share-modal-success p{margin:0;font-size:14px;color:var(--color-text-sub)}.share-modal-link{display:flex;gap:8px;margin-bottom:16px}.share-modal-link input{flex:1;padding:12px 14px;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:13px;font-family:SF Mono,Monaco,Courier New,monospace;color:var(--color-text);background:var(--color-surface)}.share-modal-link input:focus{outline:none;border-color:var(--color-text-sub)}.share-modal-link button{padding:12px 16px;background:var(--color-surface-hover);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-sub);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}.share-modal-link button:hover{background:var(--color-surface);border-color:var(--color-text-sub)}.share-modal-info{padding:12px;background:var(--color-surface);border-radius:var(--radius-md)}.share-modal-info p{margin:0;font-size:13px;color:var(--color-text-sub)}.icon-button{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:none;border-radius:var(--radius-md);color:var(--color-text-sub);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.icon-button:hover{background:var(--color-surface-hover);color:var(--color-primary)}.icon-button:active{transform:scale(.95)}.icon-button:disabled{cursor:not-allowed;opacity:.5}.icon-button:disabled:hover{background:transparent;color:var(--color-text-sub)}.chat-container{display:flex;flex-direction:column;height:100%;position:relative;background-color:var(--color-bg)}.chat-header{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg);background:#fffffff2;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);position:sticky;top:0;z-index:50;border-bottom:1px solid var(--color-border)}@media(min-width:768px){.chat-header{padding-left:max(var(--spacing-lg),calc((100% - 700px)/2));padding-right:max(var(--spacing-lg),calc((100% - 700px)/2))}}.chat-title-dropdown{flex:1;max-width:400px}.chat-title-dropdown .dropdown-container{width:100%}.chat-title-dropdown .dropdown-label{display:none}.chat-title-dropdown .dropdown-trigger{background:transparent;border:none;padding:8px 12px;font-size:18px;font-weight:800;min-height:40px}.chat-title-dropdown .dropdown-value{display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;line-height:1.3;max-height:2.6em;word-break:break-word}.chat-title-dropdown .dropdown-trigger:hover{background-color:var(--color-surface-hover)}.chat-header-actions{display:flex;align-items:center;gap:8px}.new-chat-btn{background:transparent;color:var(--color-text-sub);border:none;border-radius:var(--radius-full);width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:none;transition:all .2s cubic-bezier(.34,1.56,.64,1)}.new-chat-btn:hover{background-color:var(--color-surface-hover);color:var(--color-primary);transform:scale(1.1)}.share-chat-btn{background:transparent;color:var(--color-text-sub);border:none;border-radius:var(--radius-full);width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:none;transition:all .2s cubic-bezier(.34,1.56,.64,1)}.share-chat-btn:hover{background-color:var(--color-surface-hover);color:var(--color-primary);transform:scale(1.1)}.language-selector{position:relative}.language-selector-btn{display:flex;align-items:center;gap:4px;padding:6px 12px;font-size:12px;color:var(--color-text-sub);background:transparent;border:1px solid var(--color-border);border-radius:20px;cursor:pointer;transition:all .2s}.language-selector-btn:hover{border-color:var(--color-text-sub);color:var(--color-text)}.language-dropdown{position:absolute;top:100%;right:0;margin-top:6px;background:#fff;border:1px solid var(--color-border);border-radius:8px;box-shadow:0 4px 12px #0000001a;z-index:100;min-width:120px;overflow:hidden}.language-option{display:flex;align-items:center;gap:8px;width:100%;padding:10px 14px;border:none;background:none;cursor:pointer;text-align:left;transition:background .15s}.language-option:hover,.language-option.active{background:var(--color-surface-hover)}.language-label{font-size:13px;font-weight:500;color:var(--color-text);min-width:24px}.language-name{font-size:11px;color:var(--color-text-sub)}.messages-area{flex:1;overflow-y:auto;padding:var(--spacing-lg);padding-bottom:180px;display:flex;flex-direction:column;gap:40px}@media(min-width:768px){.messages-area{max-width:700px;padding-bottom:120px;margin:0 auto;width:100%}}.message-row.user{display:flex;justify-content:flex-end}.user-message-wrapper{display:flex;flex-direction:column;align-items:flex-end;max-width:80%}.message-bubble.user{padding:14px 20px;background-color:var(--color-primary);color:#fff;border-radius:var(--radius-lg) 4px var(--radius-lg) var(--radius-lg);box-shadow:none;font-size:16px;font-weight:600;width:100%;line-height:1.5}.user-message-actions{display:flex;gap:4px;margin-top:8px;opacity:0;transition:opacity .2s}.user-message-wrapper:hover .user-message-actions{opacity:1}.message-stream.ai{max-width:100%;padding-right:12px;line-height:1.7;position:relative}.stream-text{font-size:17px;line-height:1.7;color:var(--color-text-main);margin:0;white-space:pre-wrap}.ai-message-actions{display:flex;gap:4px;margin-top:8px;opacity:0;transition:opacity .2s}.message-stream.ai:hover .ai-message-actions{opacity:1}.message-stream.ai code{background:var(--color-surface-hover);padding:2px 6px;border-radius:4px;font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,Monaco,Consolas,monospace;font-size:.9em;color:var(--color-text-main)}.message-stream.ai pre{background:var(--color-surface-hover);padding:12px 16px;border-radius:8px;overflow-x:auto;margin:12px 0}.message-stream.ai pre code{background:none;padding:0;font-size:14px;line-height:1.5}.cards-vertical-stack{display:flex;flex-direction:column;gap:16px;width:100%}.input-area{position:fixed;bottom:80px;left:0;right:0;padding:var(--spacing-md) var(--spacing-lg);background:linear-gradient(to top,var(--color-bg) 40%,rgba(255,255,255,0) 100%);z-index:40}.low-credits-warning{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;margin-bottom:12px;background:linear-gradient(135deg,#fff9e6,#fff4d6);border:2px solid var(--color-accent-yellow);border-radius:var(--radius-md);box-shadow:0 2px 8px #fdcb6e26}.low-credits-warning .warning-content{display:flex;align-items:flex-start;gap:10px;flex:1}.low-credits-warning svg{flex-shrink:0;color:var(--color-accent-yellow);margin-top:2px}.low-credits-warning .warning-text{display:flex;flex-direction:column;gap:2px;flex:1}.low-credits-warning .warning-message{font-size:14px;font-weight:700;color:#8b6914;line-height:1.3}.low-credits-warning .warning-balance{font-size:13px;font-weight:600;color:#b8860b;opacity:.85}.low-credits-warning .top-up-btn{padding:10px 20px;background:var(--color-accent-yellow);color:#fff;border:none;border-radius:var(--radius-full);font-size:14px;font-weight:800;cursor:pointer;transition:all var(--transition-fast);flex-shrink:0;text-transform:uppercase;letter-spacing:.5px;box-shadow:0 2px 6px #fdcb6e4d}.low-credits-warning .top-up-btn:hover{background:var(--color-accent-orange);transform:translateY(-2px);box-shadow:0 4px 12px #fdcb6e66}.low-credits-warning .top-up-btn:active{transform:translateY(0);box-shadow:0 1px 3px #fdcb6e4d}.input-mode-tabs{display:flex;gap:8px;margin-bottom:10px;padding-left:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}.input-mode-tabs::-webkit-scrollbar{display:none}.input-mode-tab{display:flex;align-items:center;gap:5px;padding:6px 12px;border-radius:20px;flex-shrink:0;border:none;background:var(--color-surface);color:var(--color-text-sub);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:0 1px 3px #0000000f}.input-mode-tab:hover{background:var(--color-border);transform:translateY(-1px)}.input-mode-tab.active{background:var(--tab-color);color:#fff;box-shadow:0 2px 8px #00000026}.input-mode-tab.active:hover{background:var(--tab-color);filter:brightness(1.1)}.course-config-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;border-radius:50%;background:var(--color-surface-hover);border:1px solid var(--color-border);color:var(--color-text-sub);cursor:pointer;transition:all .2s ease;flex-shrink:0}.course-config-btn:hover{background:var(--color-surface-active);color:#8b5cf6;border-color:#8b5cf6}.input-box-wrapper{display:flex;align-items:center;gap:8px;background:var(--color-surface);height:56px;border-radius:28px;padding:0 8px 0 12px;box-shadow:0 8px 30px #00000014;border:1px solid var(--color-border);transition:border-color .2s,box-shadow .2s}.input-box-wrapper:focus-within{border-color:var(--active-color, var(--color-primary));box-shadow:0 8px 30px #00000014,0 0 0 2px color-mix(in srgb,var(--active-color, var(--color-primary)) 20%,transparent)}.input-box{flex:1;background:transparent;border:none;outline:none;height:100%;font-size:16px;font-weight:500;color:var(--color-text-main)}.input-box::placeholder{color:var(--color-text-sub);font-weight:600}.lang-switcher-btn{width:36px;height:36px;min-width:36px;border-radius:50%;background:#fff;border:2px solid var(--color-border);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s ease;padding:0;flex-shrink:0}.lang-switcher-btn:hover{border-color:var(--color-primary);background:var(--color-primary-fade);transform:translateY(-1px)}.lang-switcher-btn:active{transform:translateY(0) scale(.95)}.lang-code{line-height:1;display:flex;align-items:center;justify-content:center;color:var(--color-text-sub);font-size:14px;font-weight:700;letter-spacing:.3px}.send-btn{width:40px;height:40px;border-radius:50%;background:var(--btn-color, var(--color-primary));color:#fff;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;flex-shrink:0}.send-btn:hover:not(:disabled){transform:scale(1.05);filter:brightness(1.1)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.chat-loading{flex:1;display:flex;align-items:center;justify-content:center;color:var(--color-text-sub);font-weight:600}.chat-welcome{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:24px 16px 100px}.welcome-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;flex:1;color:var(--color-text-sub);font-size:14px;font-weight:600}.welcome-error{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;flex:1;text-align:center}.welcome-error p{font-size:16px;color:var(--color-text-sub);margin:0}.retry-btn{padding:8px 16px;border-radius:var(--radius-md);background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-main);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s}.retry-btn:hover{background:var(--color-surface-hover)}.welcome-content{max-width:550px;margin:0 auto;width:100%;text-align:center}.welcome-suggestions{max-width:520px;margin:auto;width:100%;text-align:center}.welcome-message{display:flex;flex-direction:column;align-items:center;gap:12px;margin-bottom:36px;padding:0 16px}.welcome-message .welcome-emoji{font-size:44px;line-height:1}.welcome-message h3{font-size:18px;line-height:1.6;font-weight:500;color:var(--color-text-main);margin:0}.suggestions-tabs{display:flex;width:100%;padding:0;margin:0}.suggestions-tab{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:10px 8px;border:none;background:transparent;border-radius:0;font-size:12px;font-weight:500;color:var(--color-text-sub);cursor:pointer;transition:color .2s ease}.suggestions-tab:hover{color:var(--color-text-main)}.suggestions-tab.active{color:var(--tab-color, var(--color-text-main));font-weight:600}.suggestions-tab.active svg{color:var(--tab-color)}.suggestions-tab svg{flex-shrink:0;width:14px;height:14px}.tab-label{white-space:nowrap}.suggestions-progress{height:2px;background:var(--color-border);width:100%;overflow:hidden}.suggestions-progress-bar{height:100%;transition:width .05s linear;opacity:.2}.suggestions-content{padding:20px 8px 0}.suggestions-subtitle{font-size:13px;color:var(--color-text-sub);margin:0 0 16px;font-weight:400}.suggestions-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.welcome-emoji{font-size:48px;line-height:1}.welcome-content h3{font-size:17px;line-height:1.6;font-weight:500;color:var(--color-text-main);text-align:center;margin:0}.welcome-content .suggestion-group{text-align:center}.chat-error{padding:var(--spacing-md);background:#fee;border-radius:var(--radius-md);color:#c00;font-size:14px}.sending-indicator{display:flex;align-items:center;gap:8px;color:var(--color-text-sub);font-size:14px}.course-generation-tip{margin-top:4px;color:var(--color-text-sub);font-size:12px;line-height:1.5}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.suggestion-buttons{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.suggestion-btn{padding:8px 16px;background:#fffc;border:1px solid var(--color-border);border-radius:20px;font-size:14px;color:var(--color-text);cursor:pointer;transition:all .2s ease;white-space:normal;text-align:left;line-height:1.4}.suggestion-btn:hover:not(:disabled){background:#fff;border-color:var(--color-primary);transform:translateY(-1px);box-shadow:0 2px 8px #00000014}.suggestion-btn:active:not(:disabled){transform:translateY(0)}.suggestion-btn:disabled{opacity:.5;cursor:not-allowed}.suggestion-group.disabled{opacity:.9;pointer-events:none}.suggestion-group.disabled .suggestion-btn{cursor:default}.suggestion-group{margin-bottom:8px}.suggestion-group.with-header{margin-bottom:20px}.suggestion-group.with-header .suggestion-buttons{margin-top:8px;justify-content:center}.suggestion-header{display:flex;flex-direction:column;align-items:center;gap:2px;margin-bottom:4px}.suggestion-header-main{display:flex;align-items:center;justify-content:center;gap:6px;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--header-color, var(--color-text-sub))}.suggestion-header-main svg{color:var(--header-color, var(--color-text-sub));width:14px;height:14px}.suggestion-header-subtitle{font-size:11px;font-weight:400;color:var(--color-text-sub);opacity:.7;text-transform:none;letter-spacing:0}.welcome-content .suggestion-buttons{justify-content:center}.welcome-content .suggestion-btn{padding:6px 14px;font-size:13px}.suggestion-btn.course-suggestion{display:flex;align-items:center;gap:8px}.suggestion-btn .suggestion-text{flex:1}.suggestion-btn .suggestion-label{font-size:11px;padding:2px 8px;background:#10b98126;color:#10b981;border-radius:10px;white-space:nowrap;font-weight:500}@media(max-width:400px){.low-credits-warning{flex-direction:column;align-items:stretch;gap:10px}.low-credits-warning .top-up-btn{width:100%;padding:12px 20px}}@media(min-width:768px){.input-area{left:260px;right:0;bottom:0;padding:var(--spacing-md) var(--spacing-lg);padding-bottom:40px;background:none;max-width:700px;margin:0 auto}.input-box-wrapper{max-width:100%}}.mellow-capsule{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;background:var(--color-surface-hover);border:1px solid var(--color-border);border-radius:20px;font-size:14px;color:var(--color-text-sub)}.mellow-capsule svg{color:var(--color-text-sub);flex-shrink:0;opacity:.7}.mellow-capsule.dict-capsule{background:#3498db14;border-color:#3498db33}.mellow-capsule.dict-capsule svg{color:#3498db}.mellow-capsule.grammar-capsule{background:#9b59b614;border-color:#9b59b633}.mellow-capsule.grammar-capsule svg{color:#9b59b6}.mellow-capsule.native-capsule{background:#f5a62314;border-color:#f5a62333}.mellow-capsule.native-capsule svg{color:#f5a623}