@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap";@layer components;@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-ease:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--ease-out:cubic-bezier(0, 0, .2, 1);--ease-in-out:cubic-bezier(.4, 0, .2, 1);--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer utilities{.collapse{visibility:collapse}.visible{visibility:visible}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline-block{display:inline-block}.inline-flex{display:inline-flex}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.border{border-style:var(--tw-border-style);border-width:1px}.uppercase{text-transform:uppercase}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.ease-in-out{--tw-ease:var(--ease-in-out);transition-timing-function:var(--ease-in-out)}.ease-out{--tw-ease:var(--ease-out);transition-timing-function:var(--ease-out)}}:root{--primary:#1a56db;--primary-dark:#1e40af;--primary-light:#dbeafe;--success:#059669;--success-light:#d1fae5;--warning:#d97706;--warning-light:#fef3c7;--danger:#dc2626;--danger-light:#fee2e2;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--radius:12px;--shadow:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--gray-50);color:var(--gray-800);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}#root,.app-container{flex-direction:column;min-height:100vh;display:flex}.nav{border-bottom:1px solid var(--gray-200);z-index:100;box-shadow:var(--shadow);background:#fff;padding:0 24px;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:1200px;height:64px;margin:0 auto;display:flex}.nav-logo{color:var(--gray-900);align-items:center;gap:10px;font-size:18px;font-weight:800;text-decoration:none;display:flex}.nav-logo-icon{background:linear-gradient(135deg,#1a56db,#7c3aed);border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;font-size:20px;display:flex}.nav-links{gap:4px;display:flex}.nav-link{color:var(--gray-500);border-radius:8px;padding:8px 16px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s}.nav-link:hover{background:var(--gray-100);color:var(--gray-800)}.nav-link.active{background:var(--primary-light);color:var(--primary)}.lang-toggle{border:2px solid var(--gray-200);cursor:pointer;background:#fff;border-radius:8px;margin-left:8px;padding:8px 14px;font-size:14px;font-weight:600;transition:all .2s}.lang-toggle:hover{border-color:var(--primary);background:var(--primary-light);color:var(--primary)}.main-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:32px 24px}.hero{color:#fff;background:linear-gradient(135deg,#1a56db 0%,#7c3aed 100%);border-radius:16px;margin-bottom:32px;padding:48px;position:relative;overflow:hidden}.hero:before{content:"";background:#ffffff1a;border-radius:50%;width:400px;height:400px;position:absolute;top:-50%;right:-20%}.hero h1{margin-bottom:8px;font-size:36px;font-weight:800;position:relative}.hero p{opacity:.9;max-width:500px;font-size:16px;position:relative}.hero-stats{flex-wrap:wrap;gap:24px;margin-top:24px;display:flex;position:relative}.hero-stat{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff26;border-radius:12px;padding:16px 24px}.hero-stat-value{font-size:28px;font-weight:800}.hero-stat-label{opacity:.8;font-size:13px}.section-title{color:var(--gray-900);margin-bottom:16px;font-size:22px;font-weight:700}.cards-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-bottom:32px;display:grid}.card{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--gray-200);color:inherit;cursor:pointer;background:#fff;padding:24px;text-decoration:none;transition:all .2s;display:block}.card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary);transform:translateY(-2px)}.card-icon{border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:12px;font-size:24px;display:flex}.card-title{color:var(--gray-900);margin-bottom:4px;font-size:16px;font-weight:600}.card-desc{color:var(--gray-500);font-size:13px}.card-progress{background:var(--gray-200);border-radius:2px;height:4px;margin-top:12px;overflow:hidden}.card-progress-fill{border-radius:2px;height:100%;transition:width .3s}.study-header{flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:24px;display:flex}.back-btn{border:1px solid var(--gray-200);cursor:pointer;color:var(--gray-600);background:#fff;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s;display:inline-flex}.back-btn:hover{background:var(--gray-100);border-color:var(--gray-300)}.study-chapter-icon{border-radius:14px;justify-content:center;align-items:center;width:56px;height:56px;font-size:28px;display:flex}.study-chapter-title{color:var(--gray-900);font-size:28px;font-weight:800}.study-chapter-num{color:var(--gray-500);font-size:14px;font-weight:500}.study-sections{flex-direction:column;gap:16px;display:flex}.study-section{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);background:#fff;overflow:hidden}.study-section-header{cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:16px 24px;font-size:16px;font-weight:600;transition:background .2s;display:flex}.study-section-header:hover{background:var(--gray-50)}.study-section-content{color:var(--gray-700);padding:0 24px 20px;font-size:15px;line-height:1.8}.study-section-content p{margin-bottom:6px}.section-complete-btn{border:2px solid var(--success);color:var(--success);cursor:pointer;background:0 0;border-radius:8px;align-items:center;gap:8px;margin-top:16px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .2s;display:flex}.section-complete-btn:hover,.section-complete-btn.completed{background:var(--success);color:#fff}.video-section{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);background:#fff;margin-bottom:24px;padding:24px}.video-section h3{align-items:center;gap:8px;margin-bottom:12px;font-size:18px;display:flex}.video-container{background:#000;border-radius:8px;width:100%;padding-bottom:56.25%;position:relative;overflow:hidden}.video-container iframe{border:none;width:100%;height:100%;position:absolute;top:0;left:0}.quiz-setup{border-radius:var(--radius);border:1px solid var(--gray-200);max-width:600px;box-shadow:var(--shadow);background:#fff;margin:0 auto;padding:40px}.quiz-setup h2{text-align:center;margin-bottom:24px;font-size:24px;font-weight:700}.quiz-option-group{margin-bottom:20px}.quiz-option-group label{color:var(--gray-700);margin-bottom:8px;font-size:14px;font-weight:600;display:block}.quiz-options-row{flex-wrap:wrap;gap:8px;display:flex}.quiz-option-btn{border:2px solid var(--gray-200);cursor:pointer;background:#fff;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .2s}.quiz-option-btn:hover{border-color:var(--primary);background:var(--primary-light)}.quiz-option-btn.selected{border-color:var(--primary);background:var(--primary);color:#fff}.quiz-start-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:10px;width:100%;margin-top:16px;padding:14px;font-size:16px;font-weight:700;transition:background .2s}.quiz-start-btn:hover{background:var(--primary-dark)}.quiz-active{max-width:700px;margin:0 auto}.quiz-progress-bar{background:var(--gray-200);border-radius:4px;height:8px;margin-bottom:24px;overflow:hidden}.quiz-progress-fill{background:var(--primary);border-radius:4px;height:100%;transition:width .3s}.quiz-question-card{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);background:#fff;padding:32px}.quiz-question-num{color:var(--primary);margin-bottom:8px;font-size:13px;font-weight:600}.quiz-question-text{color:var(--gray-900);margin-bottom:24px;font-size:20px;font-weight:700;line-height:1.4}.quiz-answers{flex-direction:column;gap:10px;display:flex}.quiz-answer{border:2px solid var(--gray-200);cursor:pointer;background:#fff;border-radius:10px;align-items:center;gap:12px;padding:14px 20px;font-size:15px;font-weight:500;transition:all .15s;display:flex}.quiz-answer:hover:not(.disabled),.quiz-answer.selected{border-color:var(--primary);background:var(--primary-light)}.quiz-answer.correct{border-color:var(--success);background:var(--success-light)}.quiz-answer.incorrect{border-color:var(--danger);background:var(--danger-light)}.quiz-answer.disabled{cursor:default}.quiz-answer-letter{background:var(--gray-100);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:13px;font-weight:700;display:flex}.quiz-explanation{background:var(--gray-50);border-left:4px solid var(--primary);color:var(--gray-700);border-radius:8px;margin-top:20px;padding:16px;font-size:14px;line-height:1.6}.quiz-next-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:20px;padding:12px 28px;font-size:15px;font-weight:600;transition:background .2s}.quiz-next-btn:hover{background:var(--primary-dark)}.quiz-results{text-align:center;max-width:600px;margin:0 auto}.quiz-results-card{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);background:#fff;padding:48px 32px}.quiz-score-circle{border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:140px;height:140px;margin:0 auto 24px;font-size:36px;font-weight:800;display:flex}.quiz-score-label{font-size:14px;font-weight:500}.quiz-results h2{margin-bottom:8px;font-size:24px;font-weight:700}.quiz-results p{color:var(--gray-500);margin-bottom:24px}.quiz-results-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.btn-primary{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;align-items:center;gap:6px;padding:12px 24px;font-size:14px;font-weight:600;text-decoration:none;transition:background .2s;display:inline-flex}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{color:var(--gray-700);border:1px solid var(--gray-300);cursor:pointer;background:#fff;border-radius:8px;align-items:center;gap:6px;padding:12px 24px;font-size:14px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:var(--gray-100)}.signs-filter{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.filter-btn{border:2px solid var(--gray-200);cursor:pointer;background:#fff;border-radius:20px;padding:8px 18px;font-size:14px;font-weight:500;transition:all .2s}.filter-btn:hover,.filter-btn.active{border-color:var(--primary);background:var(--primary-light);color:var(--primary)}.signs-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.sign-card{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);cursor:pointer;background:#fff;padding:24px;transition:all .2s}.sign-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.sign-card.flipped{border-color:var(--primary)}.sign-visual{text-align:center;color:#fff;justify-content:center;align-items:center;width:80px;height:80px;margin:0 auto 16px;font-size:14px;font-weight:800;line-height:1.2;display:flex}.sign-visual.octagon{clip-path:polygon(30% 0%,70% 0%,100% 30%,100% 70%,70% 100%,30% 100%,0% 70%,0% 30%)}.sign-visual.triangle{clip-path:polygon(50% 100%,0% 0%,100% 0%);padding-top:10px}.sign-visual.diamond{clip-path:polygon(50% 0%,100% 50%,50% 100%,0% 50%)}.sign-visual.circle{border-radius:50%}.sign-visual.rectangle,.sign-visual.rectangle-h{border-radius:4px}.sign-visual.pentagon{clip-path:polygon(50% 0%,100% 38%,82% 100%,18% 100%,0% 38%)}.sign-visual.pennant{clip-path:polygon(0% 0%,100% 50%,0% 100%);width:100px}.sign-name{text-align:center;color:var(--gray-900);margin-bottom:4px;font-size:15px;font-weight:600}.sign-category{text-align:center;color:var(--gray-400);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:500}.sign-description{color:var(--gray-600);text-align:center;margin-top:12px;font-size:13px;line-height:1.5;display:none}.sign-card.flipped .sign-description{display:block}.videos-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px;display:grid}.video-card{border-radius:var(--radius);border:1px solid var(--gray-200);box-shadow:var(--shadow);background:#fff;transition:all .2s;overflow:hidden}.video-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.video-card-thumb{background:#000;padding-bottom:56.25%;position:relative;overflow:hidden}.video-card-thumb img{object-fit:cover;width:100%;height:100%;position:absolute;top:0;left:0}.video-card-play{color:#fff;background:#000000b3;border-radius:50%;justify-content:center;align-items:center;width:60px;height:60px;font-size:24px;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.video-card-info{padding:16px}.video-card-title{margin-bottom:4px;font-size:15px;font-weight:600}.video-card-chapter{color:var(--gray-400);font-size:13px}.chevron{color:var(--gray-400);font-size:14px;transition:transform .2s}.chevron.open{transform:rotate(90deg)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.3s ease-out fadeIn}@keyframes dotPulse{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1.2)}}@media (width<=768px){.nav-inner{flex-direction:column;gap:8px;height:auto;padding:12px 0}.nav-links{justify-content:center;width:100%;overflow-x:auto}.hero{padding:32px 24px}.hero h1{font-size:24px}.hero-stats{flex-direction:column;gap:12px}.cards-grid,.videos-grid{grid-template-columns:1fr}.quiz-setup{padding:24px}.quiz-question-card{padding:20px}.quiz-question-text{font-size:17px}}@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-border-style{syntax:"*";inherits:false;initial-value:solid}@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}