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:root{--brand:#0d9488;--brand-light:#14b8a6;--brand-dark:#0f766e;--brand-subtle:#f0fdfa;--accent:#f97316;--accent-hover:#ea580c;--accent-light:#fff7ed;--bg-base:#fafaf9;--bg-elevated:#fafaf9;--bg-surface:#f5f5f4;--bg-input:#e7e5e4;--text-primary:#1c1917;--text-secondary:#57534e;--text-tertiary:#a8a29e;--text-inverse:#fafaf9;--dark-1:#1c1917;--dark-2:#292524;--dark-3:#44403c;--success:#22c55e;--warning:#eab308;--danger:#ef4444;--info:#0d9488;--difficulty-beginner:#22c55e;--difficulty-intermediate:#eab308;--difficulty-advanced:#ef4444;--shadow-xs:0 1px 2px #0000000d;--shadow-sm:0 1px 3px #0000000d, 0 1px 2px #0000000d;--shadow-md:0 4px 6px #0000000d, 0 2px 4px #0000000d;--shadow-lg:0 10px 15px #0000000d, 0 4px 6px #0000000a;--shadow-xl:0 20px 25px #0000000d, 0 10px 10px #0000000a;--shadow-card:0 2px 8px #0000000a, 0 16px 48px #00000014, 0 40px 80px #0000000f;--glow-brand:0 0 24px #0d948826, 0 0 48px #0d948814;--glow-accent:0 4px 16px #f973164d, 0 0 48px #f973161a;--glow-brand-strong:0 0 32px #0d948840, 0 0 64px #0d94881f;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-24:96px;--space-32:128px;--text-xs:12px;--text-sm:13px;--text-base:14px;--text-md:16px;--text-lg:18px;--text-xl:20px;--text-2xl:24px;--text-3xl:32px;--text-4xl:40px;--text-5xl:clamp(2.5rem, 5vw, 3.5rem);--font-caption:var(--text-xs);--font-small:var(--text-sm);--font-body:var(--text-base);--font-ui:var(--text-md);--font-subheading:var(--text-lg);--font-title:var(--text-xl);--font-title-lg:var(--text-2xl);--font-heading:var(--text-3xl);--font-display:var(--text-4xl);--font-hero:var(--text-5xl);--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:24px;--radius-full:9999px;--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-out-expo:cubic-bezier(.19, 1, .22, 1);--ease-in-out:cubic-bezier(.65, 0, .35, 1);--z-base:1;--z-sticky:10;--z-dropdown:50;--z-header:100;--z-overlay:200;--z-toast:300;--z-modal-backdrop:900;--z-modal:901;--surface-black-04:#1c19170a;--surface-black-06:#1c19170f;--surface-black-08:#1c191714;--surface-white-06:#ffffff0f;--surface-white-08:#ffffff14;--surface-white-12:#ffffff1f;--surface-white-14:#ffffff24;--text-white-60:#fff9;--text-white-70:#ffffffb3;--border-light-04:#ffffff0a;--border-light-06:#ffffff0f;--border-light-08:#ffffff14;--border-light-12:#ffffff1f;--brand-06:#0d94880f;--brand-10:#0d94881a;--brand-12:#0d94881f;--accent-10:#f973161a;--success-08:#22c55e14;--success-10:#22c55e1a;--success-20:#22c55e33;--difficulty-beginner-light:#4ade80;--difficulty-intermediate-light:#facc15;--difficulty-advanced-light:#f87171;--header-height:60px;--max-width:1200px;--max-width-narrow:900px;--emotion-joy:#34d399;--emotion-joy-dark:#16a34a;--emotion-joy-light:#a7f3d0;--emotion-joy-warm:#fcd34d;--emotion-joy-glow:#34d39926;--emotion-joy-subtle:#34d39914;--emotion-focus:var(--brand);--emotion-focus-dark:var(--brand-dark);--emotion-focus-light:var(--brand-subtle);--emotion-focus-glow:#0d94881f;--emotion-focus-subtle:#0d94880d;--emotion-warmth:var(--accent);--emotion-warmth-dark:var(--accent-hover);--emotion-warmth-light:var(--accent-light);--emotion-warmth-mid:#fb923c;--emotion-warmth-glow:#f973161f;--emotion-warmth-subtle:#f973160d;--emotion-alert:#f43f5e;--emotion-alert-dark:#e11d48;--emotion-alert-light:#ffe4e6;--emotion-alert-glow:#f43f5e1f;--emotion-alert-subtle:#f43f5e14;--glow-joy:0 0 24px var(--emotion-joy-glow), 0 0 48px #34d3990f;--glow-focus:0 0 24px var(--emotion-focus-glow), 0 0 48px #0d94880f;--glow-warmth:0 0 24px var(--emotion-warmth-glow), 0 0 48px #f973160f;--glow-alert:0 0 24px var(--emotion-alert-glow), 0 0 48px #f43f5e0f}
.emotion-bg-joy{background:linear-gradient(135deg, var(--emotion-joy-subtle) 0%, transparent 60%)}.emotion-bg-focus{background:linear-gradient(135deg, var(--emotion-focus-subtle) 0%, transparent 60%)}.emotion-bg-warmth{background:linear-gradient(135deg, var(--emotion-warmth-subtle) 0%, transparent 60%)}.emotion-bg-alert{background:linear-gradient(135deg, var(--emotion-alert-subtle) 0%, transparent 60%)}.emotion-glow-joy{box-shadow:var(--glow-joy)}.emotion-glow-focus{box-shadow:var(--glow-focus)}.emotion-glow-warmth{box-shadow:var(--glow-warmth)}.emotion-glow-alert{box-shadow:var(--glow-alert)}@keyframes emotion-joy-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}@keyframes emotion-focus-breathe{0%,to{opacity:1}50%{opacity:.7}}@keyframes emotion-warmth-glow{0%,to{box-shadow:0 0 0 0 var(--emotion-warmth-glow)}50%{box-shadow:0 0 20px 4px var(--emotion-warmth-glow)}}@keyframes emotion-alert-shake{0%,to{transform:translate(0)}15%{transform:translate(-6px)}30%{transform:translate(6px)}45%{transform:translate(-4px)}60%{transform:translate(4px)}75%{transform:translate(-2px)}90%{transform:translate(2px)}}.emotion-text-joy{background:linear-gradient(135deg, var(--emotion-joy) 0%, var(--emotion-joy-warm) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.emotion-text-warmth{background:linear-gradient(135deg, var(--emotion-warmth) 0%, var(--emotion-warmth-mid) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}
*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:var(--bg-base);color:var(--text-primary);font-size:var(--font-body);min-height:100vh;line-height:1.6}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;background:0 0;border:none}img{max-width:100%;height:auto;display:block}ul,ol{list-style:none}.container{max-width:var(--max-width);padding:0 var(--space-6);margin:0 auto}.container-narrow{max-width:var(--max-width-narrow);padding:0 var(--space-6);margin:0 auto}.section{padding:var(--space-32) 0}@media (max-width:768px){.section{padding:var(--space-24) 0}}.section-header{text-align:center;margin-bottom:var(--space-16)}.section-header__label{align-items:center;gap:var(--space-2);font-size:var(--font-caption);letter-spacing:.05em;text-transform:uppercase;color:var(--brand);background:var(--brand-06);padding:var(--space-1) var(--space-4);border-radius:var(--radius-full);border:1px solid var(--brand-10);margin-bottom:var(--space-5);font-weight:600;display:inline-flex}.section-header__title{font-size:var(--font-display);letter-spacing:-.03em;color:var(--text-primary);margin-bottom:var(--space-4);font-weight:800}.section-header__subtitle{font-size:var(--font-subheading);color:var(--text-secondary);max-width:560px;margin:0 auto;line-height:1.65}.section-header--dark .section-header__title{color:var(--text-inverse)}.section-header--dark .section-header__subtitle{color:var(--text-tertiary)}@media (max-width:768px){.section-header__title{font-size:var(--font-heading)}}.reveal--hidden{opacity:0;transform:translateY(20px)}.reveal--hidden,.reveal--visible{transition:opacity .6s var(--ease-out), transform .6s var(--ease-out)}.reveal--visible{opacity:1;transform:translateY(0)}.reveal-stagger>.reveal--hidden:first-child{transition-delay:0s}.reveal-stagger>.reveal--hidden:nth-child(2){transition-delay:80ms}.reveal-stagger>.reveal--hidden:nth-child(3){transition-delay:.16s}.reveal-stagger>.reveal--hidden:nth-child(4){transition-delay:.24s}.skeleton{background:linear-gradient(90deg, var(--surface-black-04) 25%, var(--surface-black-08) 50%, var(--surface-black-04) 75%);border-radius:var(--radius-md);background-size:200% 100%;animation:1.5s ease-in-out infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.gradient-text{background:linear-gradient(135deg, var(--brand-light) 0%, var(--brand) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}html{scroll-behavior:auto}.reveal--hidden{opacity:1;transform:none}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes modal-in{0%{opacity:0;transform:translate(-50%,-50%)scale(.95)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}@keyframes page-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes page-fade-out{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-4px)}}::view-transition-old(root){animation:page-fade-out .2s var(--ease-out) both}::view-transition-new(root){animation:page-fade-in .28s var(--ease-out) both}@media (prefers-reduced-motion:reduce){::view-transition-old(root){animation:none}::view-transition-new(root){animation:none}}