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#1da49c47}}.auth-button:active{opacity:.9;transform:scale(.97)}.auth-button-loading{opacity:.65;pointer-events:none}.google-login-button{color:#3c4043;cursor:pointer;width:100%;min-height:46px;box-shadow:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation;background:#fff;border:1px solid #dadce0;border-radius:12px;justify-content:center;align-items:center;gap:12px;padding:0 18px;font-family:inherit;font-size:.95rem;font-weight:500;line-height:1;transition:background-color .16s,border-color .16s,box-shadow .16s;display:inline-flex}.google-login-button svg{flex:0 0 18px}@media (hover:hover) and (pointer:fine){.google-login-button:not(:disabled):hover{background:#f8fafd;border-color:#d2d5da;box-shadow:0 1px 2px #3c40431f}}.google-login-button:focus{outline:none}.google-login-button:focus-visible{outline-offset:2px;outline:2px solid #4285f4}.google-login-button:active:not(:disabled){background:#f1f3f4}.google-login-button:disabled{cursor:default;opacity:.72}@media (max-width:720px){.login-page-main{min-height:calc(100svh - 48px - var(--mobile-bottom-nav-height) - env(safe-area-inset-bottom))!important;padding:12px 14px 14px!important;overflow:hidden!important}.login-card{border-radius:22px!important;max-width:392px!important;padding:20px 22px!important;box-shadow:0 14px 34px #2b2b3512!important}.login-heading{margin-bottom:16px!important}.login-title{font-size:1.55rem!important;line-height:1.12!important}.login-subtitle{margin-top:8px!important;font-size:.9rem!important;line-height:1.42!important}.google-login-button{min-height:42px!important;font-size:.92rem!important}.login-divider{margin:13px 0 12px!important}.login-field{margin-bottom:10px!important}.login-input{min-height:42px!important;padding:10px 12px!important;font-size:16px!important}.login-options{gap:8px!important;margin-top:-1px!important;margin-bottom:4px!important}.login-checkbox-group{gap:7px!important}.login-primary-button{margin-top:12px!important;padding:13px 18px!important}.login-register-link{margin-top:16px!important}}@media (max-width:720px) and (max-height:740px){.login-page-main{padding:8px 12px 10px!important}.login-card{border-radius:20px!important;padding:16px 20px!important}.login-heading{margin-bottom:12px!important}.login-title{font-size:1.42rem!important}.login-subtitle{margin-top:6px!important;font-size:.86rem!important}.google-login-button{min-height:40px!important}.login-divider{margin:10px 0!important}.login-field{margin-bottom:8px!important}.login-input{min-height:39px!important;padding:8px 11px!important}.login-options{margin-bottom:2px!important}.login-primary-button{margin-top:10px!important;padding:12px 16px!important}.login-register-link{margin-top:12px!important}}.skydriver-footer{background:var(--surface);width:100%;margin-top:auto}@supports (color:color-mix(in lab, red, red)){.skydriver-footer{background:color-mix(in srgb, var(--surface) 88%, transparent)}}.skydriver-footer{-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--border)}@supports (color:color-mix(in lab, red, red)){.skydriver-footer{border-top:1px solid color-mix(in srgb, var(--border) 90%, transparent)}}.skydriver-footer{padding:14px 24px;padding-bottom:calc(14px + env(safe-area-inset-bottom));color:var(--muted-foreground);box-shadow:0 -8px 24px #00000008}.footer-content{max-width:var(--page-max-width);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:16px;margin:0 auto;font-size:12px;font-weight:500;display:grid}.footer-copy,.footer-tagline{margin:0}.footer-tagline{color:var(--primary);text-align:center;justify-self:center;font-weight:600}.footer-contact-nav{justify-content:flex-end;align-items:center;gap:14px;display:flex}.footer-link{border-radius:var(--radius-pill);min-height:32px;color:inherit;-webkit-tap-highlight-color:transparent;touch-action:manipulation;align-items:center;gap:6px;line-height:1.2;text-decoration:none;transition:color .18s,opacity .18s;display:inline-flex}.footer-link svg{flex:none}@media (hover:hover) and (pointer:fine){.footer-link:hover{color:var(--primary)}}.footer-link:focus-visible{color:var(--primary);outline:2px solid var(--focus-ring);outline-offset:4px}.footer-link:active{opacity:.86}@media (min-width:721px) and (max-width:980px){:root{--app-header-logo-width:132px}.header-inner{padding:var(--app-header-padding-top) 18px var(--app-header-padding-bottom);gap:12px}.header-left{gap:8px}.header-back-link{display:inline-flex}.header-nav{gap:14px}.header-nav-link{font-size:.78rem}.header-right{min-width:76px}.auth-button{min-width:76px;height:34px;padding:0 13px}}@media (max-width:720px){:root{--app-header-padding-top:calc(8px + env(safe-area-inset-top));--app-header-padding-bottom:7px;--app-header-logo-width:132px;--mobile-bottom-nav-clearance:calc(var(--mobile-bottom-nav-height) + env(safe-area-inset-bottom));--page-shell-padding:16px 12px calc(var(--mobile-bottom-nav-height) + 48px + env(safe-area-inset-bottom));--page-header-block-gap:14px;--page-header-title-gap:6px;--page-header-title-size:clamp(1.42rem, 7vw, 1.64rem);--page-header-compact-title-size:clamp(1.28rem, 6.2vw, 1.46rem);--catalog-content-padding:14px 12px calc(var(--mobile-bottom-nav-height) + 22px + env(safe-area-inset-bottom));--catalog-controls-bottom-gap:18px}.header-inner{padding:var(--app-header-padding-top) 16px var(--app-header-padding-bottom);justify-content:center;gap:12px;position:relative}.header-left{bottom:var(--app-header-padding-bottom);left:16px;top:var(--app-header-padding-top);position:absolute}.header-back-link{display:inline-flex}.desktop-nav,.desktop-auth,.header-right,.header-actions{display:none}.skydriver-footer{padding:16px 18px;padding-bottom:calc(var(--mobile-bottom-nav-height) + 22px + env(safe-area-inset-bottom))}.footer-content{text-align:center;flex-direction:column;justify-content:center;gap:8px;display:flex}.footer-contact-nav{flex-flow:column-reverse wrap;justify-content:center;gap:0}.footer-link{min-height:28px}}.mobile-bottom-nav{display:none}.exam-marked-counter{display:none!important}.quiz-mobile-next-button{display:none}@media (min-width:641px){.exam-panel{z-index:20;align-self:start;position:sticky;top:92px}}@media (max-width:640px){.quiz-question-card{position:relative}.quiz-mobile-next-button{background:var(--primary);border-radius:var(--radius-pill);box-shadow:var(--shadow-button);color:var(--primary-foreground);z-index:2;border:none;justify-content:center;align-items:center;width:44px;height:44px;padding:0;display:inline-flex;position:absolute;top:14px;right:14px}.study-mode-page{padding:18px 12px 48px!important}.study-mode-client-frame{width:100%!important;max-width:none!important;box-shadow:none!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important;background:0 0!important;border:none!important;border-radius:0!important;padding:0!important}.flashcards-session-shell{box-shadow:none!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important;background:0 0!important;border:none!important;border-radius:0!important;padding:0!important}.study-mode-client-frame>div{box-shadow:none!important;border-left:none!important;border-right:none!important;border-radius:0!important}.exam-active-layout{padding-bottom:calc(70px + var(--mobile-bottom-nav-height) + env(safe-area-inset-bottom));flex-direction:column;gap:12px!important;display:flex!important}.exam-question-list{gap:12px!important}.exam-question-card{box-shadow:none!important;border-radius:18px!important;padding:18px!important}.exam-panel{z-index:60;scrollbar-width:none;-webkit-backdrop-filter:blur(16px);order:-1;justify-content:center;align-items:center;gap:8px;left:50%;overflow-x:auto;transform:translate(-50%);top:auto!important;bottom:calc(var(--mobile-bottom-nav-height) + 14px + env(safe-area-inset-bottom))!important;background:#ffffffeb!important;border-radius:999px!important;width:min(100% - 20px,390px)!important;margin:0!important;padding:8px!important;display:flex!important;position:fixed!important;box-shadow:0 10px 28px #0f172a1a!important}.exam-panel::-webkit-scrollbar{display:none}.exam-panel-title,.exam-panel-details,.exam-marked-box{display:none!important}.exam-marked-counter{justify-content:center;align-items:center;flex:none!important;width:auto!important;min-width:46px!important;margin:0!important;display:inline-flex!important}.exam-panel-progress{flex:1;min-width:82px;border-radius:999px!important;margin:0!important;padding:7px 10px!important}.exam-panel-progress p:first-child{display:none}.exam-panel-progress p:last-child{text-align:center;font-size:13px!important;line-height:1!important}.exam-panel-button{white-space:nowrap;border-radius:999px!important;width:auto!important;margin:0!important;padding:8px 10px!important;font-size:11px!important}.skydriver-footer{padding:12px 18px;padding-bottom:calc(var(--mobile-bottom-nav-height) + 22px + env(safe-area-inset-bottom))}.footer-content{text-align:center;justify-content:center}}@media (max-width:390px){:root{--app-header-logo-width:120px}}.study-module-action-link{cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.study-module-action-card{transition:transform .18s,box-shadow .18s,border-color .18s,background .18s}@media (hover:hover) and (pointer:fine){.study-module-action-link:hover .study-module-action-card{background:linear-gradient(#fffffffc 0%,#ffffffeb 100%);border-color:#1da49c47;transform:translateY(-3px);box-shadow:0 20px 46px #0f172a17}}.study-module-action-link:active .study-module-action-card{opacity:.9;transform:scale(.97)}.library-material-button{will-change:transform;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:transform .18s,box-shadow .18s,background-color .18s,opacity .18s,filter .18s}@media (hover:hover) and (pointer:fine){.library-material-button:hover{filter:brightness(1.02);background-color:#279893!important;transform:translateY(-2px)!important;box-shadow:0 16px 34px #1da49c4d!important}}.library-material-button.library-upgrade-button-pro:hover{background-color:#f97316!important;box-shadow:0 16px 34px #f9731647!important}.library-material-button.library-upgrade-button-student:hover{background-color:#2563eb!important;box-shadow:0 16px 34px #2563eb42!important}.library-material-button:active{opacity:.9;transform:scale(.97)!important;box-shadow:0 10px 22px #1da49c2e!important}.library-material-button.library-upgrade-button-pro:active{box-shadow:0 10px 22px #f9731633!important}.library-material-button.library-upgrade-button-student:active{box-shadow:0 10px 22px #2563eb2e!important}.library-filter-button{will-change:transform;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:transform .18s,box-shadow .18s,border-color .18s,background-color .18s,opacity .18s,color .18s}@media (hover:hover) and (pointer:fine){.library-filter-button:hover{transform:translateY(-2px);color:#1da49c!important;background-color:#1da49c14!important;border-color:#1da49c61!important;box-shadow:0 12px 26px #0f172a14!important}}.library-filter-button:active{opacity:.9;transform:scale(.97);box-shadow:0 8px 18px #0f172a0f!important}.study-module-card{will-change:transform;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:transform .2s,box-shadow .2s,border-color .2s,opacity .18s,filter .2s}.dashboard-header{--page-header-title-gap:4px}@media (max-width:860px){.dashboard-header{flex-direction:column!important;align-items:stretch!important}.dashboard-main-grid,.dashboard-side-stack{grid-template-columns:1fr!important}}@media (max-width:640px){.dashboard-primary-button{width:100%!important}}@media (max-width:720px){.dashboard-resource-grid{grid-template-columns:1fr!important}.profile-hero-card{text-align:center;justify-items:center;grid-template-columns:1fr!important}.profile-hero-card>a{width:100%}}.catalog-page-header{--page-header-block-gap:14px}.catalog-page-content{padding:var(--catalog-content-padding)}.catalog-controls{margin-bottom:var(--catalog-controls-bottom-gap);grid-template-columns:1fr;gap:10px;display:grid}.catalog-filter-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}@media (max-width:640px){.catalog-page-main{min-height:100svh!important}.catalog-page-content{padding:var(--catalog-content-padding);max-width:none!important}.catalog-page-header{--page-header-block-gap:10px}.dashboard-header{margin-bottom:12px!important}.catalog-filter-row{scrollbar-width:none;flex-wrap:nowrap;gap:9px;padding-bottom:4px;overflow-x:auto}.catalog-filter-row::-webkit-scrollbar{display:none}}@media (max-width:720px){.mobile-bottom-nav{z-index:9999;min-height:90px;padding:10px 16px calc(4px + env(safe-area-inset-bottom));visibility:visible;opacity:1;pointer-events:auto;display:block;position:fixed;bottom:0;left:0;right:0;overflow:visible;transform:none}.mobile-bottom-nav-inner{-webkit-backdrop-filter:blur(18px);visibility:visible;opacity:1;background:#fffffff0;border:1px solid #e5e7ebeb;border-radius:32px;justify-content:space-around;align-items:center;gap:4px;width:min(100%,520px);min-height:80px;margin:0 auto;padding:10px 10px 12px;display:flex;overflow:visible;transform:none;box-shadow:0 -18px 44px #0f172a24}.mobile-bottom-nav-link{color:#818898;-webkit-tap-highlight-color:transparent;touch-action:manipulation;border-radius:18px;flex-direction:column;justify-content:center;align-items:center;gap:4px;min-width:64px;min-height:56px;font-size:10.5px;font-weight:400;line-height:1;text-decoration:none;transition:color .18s,background .18s,transform .18s,opacity .18s;display:flex}.mobile-bottom-nav-link.active{color:#1da49c;background:0 0}.mobile-bottom-nav-link:active{opacity:.92;transform:scale(.97)}.mobile-bottom-nav-icon{border-radius:12px;justify-content:center;align-items:center;width:24px;height:24px;display:inline-flex}.mobile-bottom-nav-label{text-overflow:ellipsis;white-space:nowrap;max-width:100%;padding-bottom:1px;font-weight:400;line-height:1.2;display:block;overflow:hidden}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}