*,:before,:after{box-sizing:border-box}*{margin:0}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--color-primary:#4f46e5;--color-primary-dark:#3730a3;--color-primary-light:#a78bfa;--color-secondary:#7c3aed;--color-text-dark:#1e293b;--color-text-medium:#64748b;--color-text-light:#94a3b8;--color-bg-white:#fff;--color-bg-light:#f8fafc;--color-bg-gray:#f5f5f5;--gradient-primary:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--gradient-subtle:linear-gradient(180deg,#f8fafc 0%,#e0e7ff 100%);--color-success:#10b981;--color-error:#ef4444;--color-warning:#f59e0b;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--theme-tech:#8b5cf6;--theme-tech-dark:#7c3aed;--theme-tech-light:#ede9fe;--theme-business:#f97316;--theme-business-dark:#ea580c;--theme-business-light:#ffedd5;--theme-science:#0ea5e9;--theme-science-dark:#0284c7;--theme-science-light:#e0f2fe;--theme-environment:#059669;--theme-environment-dark:#047857;--theme-environment-light:#d1fae5;--theme-politics:#dc2626;--theme-politics-dark:#b91c1c;--theme-politics-light:#fee2e2;--theme-culture:#f59e0b;--theme-culture-dark:#d97706;--theme-culture-light:#fef3c7;--theme-education:#06b6d4;--theme-education-dark:#0891b2;--theme-education-light:#cffafe;--theme-global:#6b7280;--theme-global-dark:#4b5563;--theme-global-light:#f3f4f6}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-text-dark:#e2e8f0;--color-text-medium:#94a3b8;--color-text-light:#64748b;--color-bg-white:#0f172a;--color-bg-light:#1e293b;--color-bg-gray:#334155;--gradient-subtle:linear-gradient(180deg,#1e293b 0%,#0f172a 100%);--shadow-sm:0 1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #0006;--shadow-lg:0 10px 15px -3px #00000080}html{font-size:16px}body{color:var(--color-text-dark);background:var(--gradient-subtle);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-attachment:fixed;min-height:100vh;padding-top:4rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}button{cursor:pointer}input,button,textarea,select{font:inherit}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.newsletter-content h1{margin-bottom:1.5rem;font-size:2rem;line-height:1.2}.newsletter-content h2{margin-top:2rem;margin-bottom:1rem;font-size:1.5rem;line-height:1.3}.newsletter-content h3{margin-top:1.5rem;margin-bottom:.75rem;font-size:1.25rem}.newsletter-content p{margin-bottom:1rem}.newsletter-content ul,.newsletter-content ol{margin-bottom:1rem;padding-left:1.5rem}.newsletter-content li{margin-bottom:.5rem}.newsletter-content blockquote{color:#666;border-left:4px solid #e5e5e5;margin:1.5rem 0;padding-left:1rem;font-style:italic}.newsletter-content pre{background-color:#f5f5f5;border-radius:4px;margin-bottom:1rem;padding:1rem;overflow-x:auto}.newsletter-content code{background-color:#f5f5f5;border-radius:3px;padding:.2em .4em;font-size:.9em}.newsletter-content pre code{background-color:#0000;padding:0}.newsletter-content hr{border:none;border-top:1px solid #e5e5e5;margin:2rem 0}.newsletter-content img{border-radius:4px;margin:1.5rem 0}.newsletter-content table{border-collapse:collapse;width:100%;margin-bottom:1rem}.newsletter-content th,.newsletter-content td{text-align:left;border:1px solid #e5e5e5;padding:.75rem}.newsletter-content th{background-color:#f5f5f5;font-weight:600}.form-group{margin-bottom:1rem}.form-label{margin-bottom:.5rem;font-weight:500;display:block}.form-input{border:1px solid #ddd;border-radius:4px;width:100%;padding:.75rem;font-size:1rem;transition:border-color .2s}.form-input:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #4f46e51a}.form-input::placeholder{color:#999}.btn{text-align:center;border:none;border-radius:4px;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;transition:background-color .2s,transform .1s;display:inline-block}.btn:hover{text-decoration:none}.btn:active{transform:translateY(1px)}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-primary:disabled{background-color:var(--color-primary-light);cursor:not-allowed}.btn-white{color:var(--color-primary);background-color:#fff;border:1px solid #0000}.btn-white:hover{background-color:#f8fafc}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-secondary{color:#333;background-color:#f5f5f5;border:1px solid #ddd}.btn-secondary:hover{background-color:#eee}.alert{border-radius:4px;margin-bottom:1rem;padding:1rem}.alert-success{color:#155724;background-color:#d4edda;border:1px solid #c3e6cb}.alert-error{color:#721c24;background-color:#f8d7da;border:1px solid #f5c6cb}.alert-info{color:#0c5460;background-color:#d1ecf1;border:1px solid #bee5eb}.header{border-bottom:1px solid #e5e5e5;margin-bottom:2rem;padding:2rem 0}.header-title{color:#1a1a1a;font-size:1.5rem;font-weight:700}.header-date{color:#666;margin-top:.5rem}.footer{text-align:center;color:#666;border-top:1px solid #e5e5e5;margin-top:3rem;padding:2rem 0}.subscribe-section{background-color:#f5f5f5;border-radius:8px;margin-top:3rem;padding:2rem}.subscribe-section h2{margin-bottom:.5rem}.subscribe-section p{color:#666;margin-bottom:1rem}.subscribe-form{gap:.5rem;display:flex}.subscribe-form .form-input{flex:1}@media (max-width:480px){.subscribe-form{flex-direction:column}.subscribe-form .btn{width:100%}}.page{min-height:100vh;padding:2rem 0}.newsletter-page{min-height:calc(100vh - 4rem)}.page-center{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:60vh;display:flex}.page-center h1{margin-bottom:1rem;font-size:2rem}.page-center p{color:#666;max-width:400px;margin-bottom:1.5rem}.card{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem;padding:3rem 2rem}.gradient-bg{background:var(--gradient-primary);color:#fff}.gradient-bg h2,.gradient-bg h3,.gradient-bg p{color:#fff}.gradient-bg .form-input{background-color:#ffffffe6;border-color:#ffffff80}.gradient-bg .form-input:focus{background-color:#fff;border-color:#fff;box-shadow:0 0 0 3px #ffffff4d}.gradient-text{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.site-header{z-index:100;background:#f5f5f5;border-bottom:1px solid #0000001a;padding:1rem 0;position:fixed;top:0;left:0;right:0}.site-header .header-content{justify-content:space-between;align-items:center;display:flex}.site-header .site-title{color:var(--color-text-dark);font-size:1.25rem;font-weight:700;text-decoration:none}.site-header .site-title:hover{color:var(--color-primary);text-decoration:none}.site-header .main-nav{align-items:center;gap:1.5rem;display:flex}.site-header .main-nav a{color:var(--color-text-medium);font-weight:500;transition:color .2s}.site-header .main-nav a:hover{color:var(--color-primary);text-decoration:none}.mobile-nav{align-items:center;gap:1rem;display:none;position:relative}@media (max-width:768px){.desktop-nav{display:none!important}.mobile-nav{display:flex!important}}@media (min-width:769px){.mobile-nav{display:none!important}.desktop-nav{display:flex!important}}.hero{color:##1e293b;text-align:center;background:0 0;margin-bottom:4rem;padding:4rem 0 3rem}.hero-title{margin-bottom:1rem;font-size:3rem;font-weight:800;line-height:1.1}.hero-subtitle{opacity:.95;max-width:600px;margin-bottom:2rem;margin-left:auto;margin-right:auto;font-size:1.25rem}.hero-cta{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.features{padding:4rem 0}.features-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-top:2rem;display:grid}.feature-card{text-align:center;padding:2rem}.feature-card h3{color:var(--color-text-dark);margin-bottom:.75rem;font-size:1.25rem}.feature-card p{color:var(--color-text-medium)}.date-navigation{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1.5rem;display:flex}.current-date{text-align:center;color:var(--color-text-dark);flex:1;font-size:1.125rem;font-weight:600}.nav-btn{background:var(--color-bg-white);border:2px solid var(--color-primary);border-radius:var(--radius-md);color:var(--color-primary);align-items:center;gap:.5rem;padding:.75rem 1.25rem;font-weight:600;text-decoration:none;transition:all .2s;display:flex}.nav-btn:hover{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md);text-decoration:none;transform:translateY(-2px)}.nav-btn-disabled{background:var(--color-bg-gray);border-radius:var(--radius-md);color:var(--color-text-light);cursor:not-allowed;opacity:.5;border:2px solid #e5e5e5;align-items:center;gap:.5rem;padding:.75rem 1.25rem;font-weight:600;display:flex}.nav-arrow{font-size:1.25rem;line-height:1}.nav-label{font-size:.875rem}.newsletter-article{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem;padding:3rem 2rem}.newsletter-header{border-bottom:2px solid #e0e7ff;margin-bottom:2rem;padding-bottom:1.5rem}.newsletter-title{color:var(--color-text-dark);margin-bottom:.5rem;font-size:2rem;font-weight:700}.newsletter-date{color:var(--color-text-medium);font-size:1rem}.form-input-dark{color:var(--color-text-dark);background-color:#ffffffe6;border-color:#ffffff80}.form-input-dark:focus{background-color:#fff;border-color:#fff;box-shadow:0 0 0 3px #ffffff4d}.form-input-dark::placeholder{color:#666}.landing-page{background:linear-gradient(135deg,#f5f3ff 0%,#ddd6fe 50%,#c4b5fd 100%);min-height:100vh}.today-preview{padding:4rem 0}.today-preview .card{max-width:800px;margin:0 auto 2rem}.subscribe-cta{text-align:center;padding:4rem 0}.subscribe-cta h2{color:var(--color-text-dark);margin-bottom:2rem}.subscribe-cta .subscribe-form{max-width:500px;margin:0 auto}.theme-badge{border-radius:var(--radius-md);color:#fff;align-items:center;gap:.375rem;padding:.375rem .75rem;font-size:.875rem;font-weight:600;transition:transform .2s;display:inline-flex}.theme-badge:hover{transform:scale(1.05)}.theme-badge-tech{background-color:var(--theme-tech)}.theme-badge-business{background-color:var(--theme-business)}.theme-badge-science{background-color:var(--theme-science)}.theme-badge-environment{background-color:var(--theme-environment)}.theme-badge-politics{background-color:var(--theme-politics)}.theme-badge-culture{background-color:var(--theme-culture)}.theme-badge-education{background-color:var(--theme-education)}.theme-badge-global{background-color:var(--theme-global)}.theme-card{background:var(--color-bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);cursor:pointer;text-align:center;border:3px solid #0000;padding:2rem;transition:transform .2s,box-shadow .2s}.theme-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.theme-card-selected{border-color:var(--color-primary);background-color:#f8fafc}.theme-card-icon{margin-bottom:1rem;font-size:3rem;display:block}.theme-card-title{color:var(--color-text-dark);margin-bottom:.5rem;font-size:1.25rem;font-weight:700}.theme-card-description{color:var(--color-text-medium);font-size:.875rem;line-height:1.5}.themes-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin:2rem 0;display:grid}@media (min-width:768px){.themes-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:1024px){.themes-grid{grid-template-columns:repeat(4,1fr)}}.language-selector{background:var(--color-bg-gray);border-radius:var(--radius-md);gap:.5rem;width:fit-content;padding:.25rem;display:flex}.language-selector button{color:var(--color-text-medium);border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:none;padding:.5rem 1rem;font-weight:600;transition:all .2s}.language-selector button.active{color:var(--color-primary);box-shadow:var(--shadow-sm);background:#fff}.language-selector button:hover:not(.active){color:var(--color-text-dark)}.theme-checkbox-wrapper{position:relative}.theme-checkbox{opacity:0;width:0;height:0;position:absolute}@media (max-width:768px){.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.125rem}.hero{padding:4rem 0 3rem}.site-header .main-nav{gap:1rem}.site-header .site-title{font-size:1.125rem}.card,.newsletter-article{padding:2rem 1.5rem}.features-grid{grid-template-columns:1fr}.date-navigation{padding:1rem}.current-date{font-size:1rem}.nav-btn,.nav-btn-disabled{padding:.5rem .75rem}.nav-label{display:none}.nav-arrow{font-size:1.5rem}}@media (max-width:480px){.hero-title{font-size:2rem}.hero-subtitle{font-size:1rem}.site-header .main-nav a{font-size:.875rem}.card,.newsletter-article{padding:1.5rem 1rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.newsletter-page{padding-bottom:2rem}@media (max-width:768px){.newsletter-page{padding-bottom:2rem}}@keyframes subtleGradientFlow{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}.newsletter-page.theme-bg-tech{background:linear-gradient(135deg,#faf5ff 0%,#ddd6fe 20%,#ede9fe 40%,#c4b5fd 60%,#ddd6fe 80%,#f5f3ff 100%) 0 0/400% 400% fixed;animation:25s infinite subtleGradientFlow}.newsletter-page.theme-bg-business{background:linear-gradient(135deg,#fff7ed 0%,#fed7aa 20%,#ffedd5 40%,#fdba74 60%,#fed7aa 80%,#fff4e6 100%) 0 0/400% 400% fixed;animation:25s infinite subtleGradientFlow}.newsletter-page.theme-bg-science{background:linear-gradient(135deg,#f0f9ff 0%,#bfdbfe 20%,#e0f2fe 40%,#7dd3fc 60%,#bfdbfe 80%,#e0f2fe 100%) 0 0/400% 400% fixed;animation:25s infinite subtleGradientFlow}.newsletter-page.theme-bg-environment{background:linear-gradient(135deg,#f0fdf4 0%,#a7f3d0 20%,#d1fae5 40%,#6ee7b7 60%,#a7f3d0 80%,#ecfdf5 100%) 0 0/400% 400% fixed;animation:25s infinite subtleGradientFlow}@media (prefers-reduced-motion:reduce){.newsletter-page.theme-bg-tech{background:#ddd6fe 0 0/100% 100%;animation:none}.newsletter-page.theme-bg-business{background:#fed7aa 0 0/100% 100%;animation:none}.newsletter-page.theme-bg-science{background:#bfdbfe 0 0/100% 100%;animation:none}.newsletter-page.theme-bg-environment{background:#a7f3d0 0 0/100% 100%;animation:none}}.dark-mode-toggle{cursor:pointer;color:#1e293b;background-color:#e2e2e2;border:none;border-radius:6px;justify-content:center;align-items:center;padding:.5rem .75rem;transition:background-color .2s,transform .2s;display:flex}.dark-mode-toggle .toggle-icon{transition:transform .3s}.dark-mode-toggle:hover{background-color:#d0d0d0}.dark-mode-toggle:hover .toggle-icon{transform:rotate(20deg)}.dark-mode-toggle:active{transform:scale(.95)}[data-theme=dark] .dark-mode-toggle{color:#e2e8f0;background-color:#334155}[data-theme=dark] .dark-mode-toggle:hover{background-color:#475569}[data-theme=dark] .landing-page{background:linear-gradient(135deg,#1e1b33 0%,#2d2550 50%,#3d2f6b 100%)}[data-theme=dark] .newsletter-page.theme-bg-tech{background:linear-gradient(135deg,#1e1b33 0%,#2d2550 20%,#3d2f6b 40%,#4a3880 60%,#2d2550 80%,#1e1b33 100%)}[data-theme=dark] .newsletter-page.theme-bg-business{background:linear-gradient(135deg,#2d1b0e 0%,#4a2f1a 20%,#6b4423 40%,#8b5a2e 60%,#4a2f1a 80%,#2d1b0e 100%)}[data-theme=dark] .newsletter-page.theme-bg-science{background:linear-gradient(135deg,#0a1929 0%,#0d2d47 20%,#104363 40%,#14597e 60%,#0d2d47 80%,#0a1929 100%)}[data-theme=dark] .newsletter-page.theme-bg-environment{background:linear-gradient(135deg,#0a1f17 0%,#0d3525 20%,#104c33 40%,#14633f 60%,#0d3525 80%,#0a1f17 100%)}[data-theme=dark] .site-header{background-color:#0f172af2;border-bottom-color:#334155}[data-theme=dark] .theme-card{background:var(--color-bg-light);border:1px solid #334155}[data-theme=dark] .theme-card:hover{background:var(--color-bg-gray);border-color:#475569}[data-theme=dark] .form-input{background-color:var(--color-bg-light);color:var(--color-text-dark);border-color:#334155}[data-theme=dark] .form-input::placeholder{color:var(--color-text-light)}[data-theme=dark] .form-input:focus{border-color:var(--color-primary);background-color:var(--color-bg-gray)}[data-theme=dark] .newsletter-article{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0f172ab3}[data-theme=dark] .newsletter-header{border-bottom-color:#334155}[data-theme=dark] a{color:var(--color-primary-light)}[data-theme=dark] a:hover{color:var(--color-primary)}[data-theme=dark] .date-navigation{background:#0f172a80}[data-theme=dark] .nav-btn{background:var(--color-bg-light);color:var(--color-text-dark)}[data-theme=dark] .nav-btn:hover{background:var(--color-bg-gray)}[data-theme=dark] .nav-btn-disabled{color:var(--color-text-light);background:#0f172a4d}[data-theme=dark] .footer{background-color:#0f172a;border-top-color:#334155}.header-btn,.lang-switcher{color:var(--color-text-dark);cursor:pointer;background-color:#e2e2e2;border:none;border-radius:6px;align-items:center;gap:.5rem;padding:.5rem .75rem;font-size:.875rem;font-weight:600;text-decoration:none;transition:background-color .2s;display:flex}.header-btn:hover,.lang-switcher:hover{background-color:#d0d0d0}[data-theme=dark] .header-btn,[data-theme=dark] .lang-switcher{color:var(--color-text-dark);background-color:#334155}[data-theme=dark] .header-btn:hover,[data-theme=dark] .lang-switcher:hover{background-color:#475569}.lang-switcher-mobile{background-color:#e2e2e2;border-radius:6px;justify-content:center;align-items:center;padding:.5rem;font-size:1.25rem;text-decoration:none;transition:background-color .2s;display:flex}.lang-switcher-mobile:hover{background-color:#d0d0d0}[data-theme=dark] .lang-switcher-mobile{background-color:#334155}[data-theme=dark] .lang-switcher-mobile:hover{background-color:#475569}.subjects-dropdown{z-index:1000;background-color:#fff;border:1px solid #e5e5e5;border-radius:8px;min-width:200px;margin-top:.5rem;position:absolute;top:100%;left:0;box-shadow:0 4px 12px #0000001a}[data-theme=dark] .subjects-dropdown{background-color:var(--color-bg-light);border-color:#334155;box-shadow:0 4px 12px #0006}.subjects-dropdown-item{color:var(--color-text-dark);border-bottom:1px solid #f0f0f0;align-items:center;gap:.75rem;padding:.75rem 1rem;text-decoration:none;transition:background-color .2s;display:flex}.subjects-dropdown-item:hover{background-color:#f8fafc}.subjects-dropdown-item:last-child{border-bottom:none}[data-theme=dark] .subjects-dropdown-item{border-bottom-color:#334155}[data-theme=dark] .subjects-dropdown-item:hover{background-color:var(--color-bg-gray)}