@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Source+Serif+4:opsz,wght@8..60,500;8..60,600&display=swap";:root{--vt-c-white: #ffffff;--vt-c-white-soft: #f8f8f8;--vt-c-white-mute: #f2f2f2;--vt-c-black: #181818;--vt-c-black-soft: #222222;--vt-c-black-mute: #282828;--vt-c-indigo: #2c3e50;--vt-c-divider-light-1: rgba(60, 60, 60, .29);--vt-c-divider-light-2: rgba(60, 60, 60, .12);--vt-c-divider-dark-1: rgba(84, 84, 84, .65);--vt-c-divider-dark-2: rgba(84, 84, 84, .48);--vt-c-text-light-1: var(--vt-c-indigo);--vt-c-text-light-2: rgba(60, 60, 60, .66);--vt-c-text-dark-1: var(--vt-c-white);--vt-c-text-dark-2: rgba(235, 235, 235, .64)}:root{--color-background: var(--vt-c-white);--color-background-soft: var(--vt-c-white-soft);--color-background-mute: var(--vt-c-white-mute);--color-border: var(--vt-c-divider-light-2);--color-border-hover: var(--vt-c-divider-light-1);--color-heading: var(--vt-c-text-light-1);--color-text: var(--vt-c-text-light-1);--section-gap: 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inset;border-right:0;border-top-right-radius:0;border-bottom-right-radius:0}.el-input-group__append{box-shadow:0 1px 0 0 var(--el-input-border-color) inset,0 -1px 0 0 var(--el-input-border-color) inset,-1px 0 0 0 var(--el-input-border-color) inset;border-left:0;border-top-left-radius:0;border-bottom-left-radius:0}.el-input-group--prepend>.el-input__wrapper{border-top-left-radius:0;border-bottom-left-radius:0}.el-input-group--prepend .el-input-group__prepend .el-select .el-select__wrapper{box-shadow:1px 0 0 0 var(--el-input-border-color) inset,0 1px 0 0 var(--el-input-border-color) inset,0 -1px 0 0 var(--el-input-border-color) inset;border-top-right-radius:0;border-bottom-right-radius:0}.el-input-group--append>.el-input__wrapper{border-top-right-radius:0;border-bottom-right-radius:0}.el-input-group--append .el-input-group__append .el-select .el-select__wrapper{box-shadow:0 1px 0 0 var(--el-input-border-color) inset,0 -1px 0 0 var(--el-input-border-color) inset,-1px 0 0 0 var(--el-input-border-color) inset;border-top-left-radius:0;border-bottom-left-radius:0}.el-input-hidden{display:none!important}.el-button{--el-button-font-weight:var(--el-font-weight-primary);--el-button-border-color:var(--el-border-color);--el-button-bg-color:var(--el-fill-color-blank);--el-button-text-color:var(--el-text-color-regular);--el-button-disabled-text-color:var(--el-disabled-text-color);--el-button-disabled-bg-color:var(--el-fill-color-blank);--el-button-disabled-border-color:var(--el-border-color-light);--el-button-divide-border-color:#ffffff80;--el-button-hover-text-color:var(--el-color-primary);--el-button-hover-bg-color:var(--el-color-primary-light-9);--el-button-hover-border-color:var(--el-color-primary-light-7);--el-button-active-text-color:var(--el-button-hover-text-color);--el-button-active-border-color:var(--el-color-primary);--el-button-active-bg-color:var(--el-button-hover-bg-color);--el-button-outline-color:var(--el-color-primary-light-5);--el-button-hover-link-text-color:var(--el-text-color-secondary);--el-button-active-color:var(--el-text-color-primary);white-space:nowrap;cursor:pointer;height:32px;color:var(--el-button-text-color);text-align:center;box-sizing:border-box;line-height:1;font-weight:var(--el-button-font-weight);-webkit-user-select:none;user-select:none;vertical-align:middle;-webkit-appearance:none;background-color:var(--el-button-bg-color);border:var(--el-border);border-color:var(--el-button-border-color);outline:none;justify-content:center;align-items:center;transition:all .1s;display:inline-flex}.el-button:hover{color:var(--el-button-hover-text-color);border-color:var(--el-button-hover-border-color);background-color:var(--el-button-hover-bg-color);outline:none}.el-button:active{color:var(--el-button-active-text-color);border-color:var(--el-button-active-border-color);background-color:var(--el-button-active-bg-color);outline:none}.el-button:focus-visible{outline:2px solid var(--el-button-outline-color);outline-offset:1px;transition:outline-offset,outline}.el-button>span{align-items:center;display:inline-flex}.el-button+.el-button{margin-left:12px}.el-button{font-size:var(--el-font-size-base);border-radius:var(--el-border-radius-base);padding:8px 15px}.el-button.is-round{padding:8px 15px}.el-button::-moz-focus-inner{border:0}.el-button [class*=el-icon]+span{margin-left:6px}.el-button [class*=el-icon] svg{vertical-align:bottom}.el-button.is-plain{--el-button-hover-text-color:var(--el-color-primary);--el-button-hover-bg-color:var(--el-fill-color-blank);--el-button-hover-border-color:var(--el-color-primary)}.el-button.is-active{color:var(--el-button-active-text-color);border-color:var(--el-button-active-border-color);background-color:var(--el-button-active-bg-color);outline:none}.el-button.is-disabled,.el-button.is-disabled:hover{color:var(--el-button-disabled-text-color);cursor:not-allowed;background-image:none;background-color:var(--el-button-disabled-bg-color);border-color:var(--el-button-disabled-border-color)}.el-button.is-loading{pointer-events:none;position:relative}.el-button.is-loading:before{z-index:1;pointer-events:none;content:"";border-radius:inherit;background-color:var(--el-mask-color-extra-light);position:absolute;inset:-1px}.el-button.is-round{border-radius:var(--el-border-radius-round)}.el-button.is-dashed{--el-button-hover-text-color:var(--el-color-primary);--el-button-hover-bg-color:var(--el-fill-color-blank);--el-button-hover-border-color:var(--el-color-primary);border-style:dashed}.el-button.is-circle{border-radius:50%;width:32px;padding:8px}.el-button.is-text{color:var(--el-button-text-color);background-color:#0000;border:0 solid #0000}.el-button.is-text.is-disabled{color:var(--el-button-disabled-text-color);background-color:#0000!important}.el-button.is-text:not(.is-disabled):hover{background-color:var(--el-fill-color-light)}.el-button.is-text:not(.is-disabled):focus-visible{outline:2px solid var(--el-button-outline-color);outline-offset:1px;transition:outline-offset,outline}.el-button.is-text:not(.is-disabled):active{background-color:var(--el-fill-color)}.el-button.is-text:not(.is-disabled).is-has-bg{background-color:var(--el-fill-color-light)}.el-button.is-text:not(.is-disabled).is-has-bg:hover{background-color:var(--el-fill-color)}.el-button.is-text:not(.is-disabled).is-has-bg:active{background-color:var(--el-fill-color-dark)}.el-button__text--expand{letter-spacing:.3em;margin-right:-.3em}.el-button.is-link{color:var(--el-button-text-color);background:0 0;border-color:#0000;height:auto;padding:2px}.el-button.is-link:hover{color:var(--el-button-hover-link-text-color)}.el-button.is-link.is-disabled{color:var(--el-button-disabled-text-color);background-color:#0000!important;border-color:#0000!important}.el-button.is-link:not(.is-disabled):hover{background-color:#0000;border-color:#0000}.el-button.is-link:not(.is-disabled):active{color:var(--el-button-active-color);background-color:#0000;border-color:#0000}.el-button--text{color:var(--el-color-primary);background:0 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56px}}@media(max-width:520px){.chapter-grid[data-v-5a965660]{grid-template-columns:1fr}}.demo-page[data-v-a2efe3bc]{--color-bg: #F9F9F7;--color-text: #1A1A1A;--color-text-secondary: #4A4A4A;--color-border: #E5E5E5;--color-border-ui: #D0D0D0;--color-bg-section: #F2F2F2;--color-primary: #7FBF7F;--color-primary-dark: #5A9F5A;--color-primary-light: #DFF0DF;--color-error: #D64545;--color-error-light: #F9E3E3;--color-error-dark: #A12F2F;--color-focus: #4A90E2;--color-focus-light: #E6F0FB;min-height:100vh;font-family:Inter,sans-serif;color:var(--color-text);background:var(--color-bg)}.top-bar[data-v-a2efe3bc]{display:flex;justify-content:space-between;align-items:center;padding:16px 32px;background:var(--color-bg);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:10}.logo[data-v-a2efe3bc]{display:flex;align-items:center;text-decoration:none}.logo-img[data-v-a2efe3bc]{height:40px;object-fit:contain}.back-link[data-v-a2efe3bc]{padding:10px 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.demo-card-desc[data-v-a2efe3bc]{margin-bottom:16px}.demo-field[data-v-a2efe3bc]{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;font-size:.875rem}.demo-field span[data-v-a2efe3bc]{font-weight:500;color:var(--color-text)}.demo-select[data-v-a2efe3bc]{padding:10px 12px;border:1px solid var(--color-border-ui);border-radius:8px;font-size:1rem;color:var(--color-text);background:var(--color-bg);cursor:pointer}.demo-select[data-v-a2efe3bc]:hover{border-color:#b8b8b8}.demo-select[data-v-a2efe3bc]:focus{outline:none;border-color:var(--color-focus);box-shadow:0 0 0 2px var(--color-focus-light)}.demo-primary[data-v-a2efe3bc]{width:100%;padding:12px 20px;font-size:.95rem;font-weight:600;color:var(--color-text);background:var(--color-primary);border:2px solid var(--color-primary);border-radius:6px;cursor:pointer;transition:background-color .2s ease,border-color .2s 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ease}.sign-up-button[data-v-56476a3e]:hover{background:var(--color-primary-light);border-color:var(--color-primary)}.sign-up-button[data-v-56476a3e]:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.demo-button[data-v-56476a3e]{padding:10px 20px;background-color:var(--color-primary-light);color:var(--color-text);border-radius:6px;text-decoration:none;font-weight:500;font-size:clamp(.875rem,1vw,1rem);line-height:1.5;transition:background-color .2s ease}.demo-button[data-v-56476a3e]:hover{background-color:var(--color-primary)}.demo-button[data-v-56476a3e]:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.login-trigger[data-v-56476a3e]{padding:10px 16px;background:transparent;color:var(--color-text);border:none;border-radius:6px;font-weight:500;font-size:clamp(.875rem,1vw,1rem);line-height:1.5;font-family:inherit;cursor:pointer;transition:color .2s 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input[data-v-56476a3e]:focus{outline:none;border-color:var(--color-text)}.modal-error[data-v-56476a3e]{margin:0;padding:8px 10px;font-size:.875rem;color:var(--color-error-dark);background:var(--color-error-light);border-radius:6px}.modal-success[data-v-56476a3e]{margin:0;padding:8px 10px;font-size:.875rem;color:var(--color-success-dark);background:var(--color-success-light);border-radius:6px}.modal-primary[data-v-56476a3e]{margin-top:4px;padding:12px 16px;background:var(--color-primary-light);color:var(--color-text);border:none;border-radius:6px;font-weight:500;font-size:clamp(.875rem,1vw,1rem);line-height:1.5;font-family:inherit;cursor:pointer;transition:background .2s ease}.modal-primary[data-v-56476a3e]:hover:not(:disabled){background:var(--color-primary)}.modal-primary[data-v-56476a3e]:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.modal-primary[data-v-56476a3e]:disabled{opacity:.65;cursor:not-allowed}.modal-link[data-v-56476a3e]{display:block;width:fit-content;margin-top:14px;padding:0;background:none;border:none;color:var(--color-text);font-size:clamp(.875rem,1vw,1rem);font-weight:500;font-family:inherit;cursor:pointer;text-decoration:underline;text-underline-offset:2px}.modal-link[data-v-56476a3e]:hover{color:var(--color-text)}.modal-link[data-v-56476a3e]:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:2px}.hero[data-v-56476a3e]{position:relative;min-height:70vh;background-size:cover;background-position:center;display:flex;justify-content:center;align-items:center;text-align:center;color:#fff;padding:80px 24px}.hero[data-v-56476a3e]:before{content:"";position:absolute;inset:0;background:#1a1a1a7a;z-index:0}.hero-content[data-v-56476a3e]{position:relative;z-index:1;max-width:820px}.hero-content h1[data-v-56476a3e]{margin:0 0 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p[data-v-56476a3e]{margin:0;font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.5;font-weight:400;color:var(--color-text)}.value-grid[data-v-56476a3e]{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:clamp(1.5rem,3vw,2rem);max-width:1040px;margin:0 auto;text-align:left}.value-card[data-v-56476a3e]{padding:28px 32px;background:var(--color-bg);border:1px solid var(--color-border);border-top:3px solid var(--color-primary);border-radius:8px}.value-card h3[data-v-56476a3e]{margin:0 0 12px}.value-card p[data-v-56476a3e]{margin:0;font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.5;font-weight:400;color:var(--color-text)}.features-section[data-v-56476a3e]{background:var(--color-bg);border-top:1px solid var(--color-border)}.features-grid[data-v-56476a3e]{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.5rem,3vw,2rem);max-width:1100px;margin:0 auto;text-align:left}.feature-card[data-v-56476a3e]{padding:32px 28px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:8px;transition:background-color .2s ease}.feature-card[data-v-56476a3e]:hover{background:var(--color-primary-light)}.feature-heading[data-v-56476a3e]{display:flex;align-items:center;gap:12px;margin-bottom:16px}.feature-icon[data-v-56476a3e]{flex-shrink:0;height:48px}.feature-card h3[data-v-56476a3e]{margin:0}.feature-card p[data-v-56476a3e]{margin:0;font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.5;font-weight:400;color:var(--color-text)}.about-section[data-v-56476a3e]{background:var(--color-primary-light);border-top:1px solid var(--color-border)}.about-prose[data-v-56476a3e]{max-width:720px;margin:0 auto;text-align:left}.about-prose p[data-v-56476a3e]{font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.5;font-weight:400;color:var(--color-text);margin:0 0 24px}.about-prose p[data-v-56476a3e]:last-child{margin-bottom:0}.site-footer[data-v-56476a3e]{padding:32px 40px;background:var(--color-text);color:var(--color-bg);border-top:1px solid var(--color-border-ui)}.footer-content[data-v-56476a3e]{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;max-width:1100px;margin:0 auto}.footer-content p[data-v-56476a3e]{margin:0;font-size:clamp(.875rem,1vw,1rem);font-weight:400;line-height:1.5}.footer-nav[data-v-56476a3e]{display:flex;align-items:center;gap:12px;font-size:clamp(.875rem,1vw,1rem);font-weight:500;line-height:1.5}.footer-nav a[data-v-56476a3e]{color:var(--color-bg);text-decoration:none;transition:color .2s ease}.footer-nav a[data-v-56476a3e]:hover{text-decoration:underline;text-underline-offset:2px}.footer-nav span[data-v-56476a3e]{color:var(--color-border-ui)}@media(max-width:900px){.top-bar[data-v-56476a3e]{flex-wrap:wrap;gap:12px}.nav-links[data-v-56476a3e]{order:3;width:100%;justify-content:center;margin-right:0}.nav-actions[data-v-56476a3e]{margin-left:auto}.features-grid[data-v-56476a3e]{grid-template-columns:repeat(2,1fr)}.challenge-grid[data-v-56476a3e]{grid-template-columns:1fr}.section[data-v-56476a3e]{padding:clamp(3.5rem,7vw,4rem) 24px}}@media(max-width:520px){.nav-actions[data-v-56476a3e]{flex-wrap:wrap;justify-content:flex-end}.hero[data-v-56476a3e]{min-height:auto;padding:60px 20px}.hero-ctas[data-v-56476a3e]{flex-direction:column;align-items:stretch}.cta-primary[data-v-56476a3e],.cta-secondary[data-v-56476a3e]{text-align:center}.features-grid[data-v-56476a3e]{grid-template-columns:1fr}.footer-content[data-v-56476a3e]{flex-direction:column;text-align:center}}