@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap";:root{--lp-dark-topbar: #09213d;--lp-dark-nav: #0d2e54;--lp-dark-hero: #0f3560;--lp-dark-footer: #09213d;--lp-bg: #f8fafc;--lp-bg-subtle: #ffffff;--lp-surface: #ffffff;--lp-primary: #124075;--lp-btn-accent: #d97706;--lp-btn-accent-hover: #b45309;--lp-btn-accent-text: #ffffff;--lp-text: #0f172a;--lp-text-muted: #64748b;--lp-border: #e2e8f0;--lp-radius-card: 16px;--lp-radius-btn: 8px}html{scroll-behavior:smooth}section[id]{scroll-margin-top:100px}.landing-root{min-height:100vh;background-color:var(--lp-bg);color:var(--lp-text);font-family:Inter,system-ui,-apple-system,sans-serif;overflow-x:hidden}.landing-container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}.landing-nav-container{width:100%;max-width:1440px;margin:0 auto;padding:0 36px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}@keyframes heroPulseGlow{0%,to{box-shadow:0 4px 16px #d9770659}50%{box-shadow:0 6px 26px #d9770699}}@keyframes badgeFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}.landing-top-bar{background:var(--lp-dark-topbar);border-bottom:1px solid rgba(255,255,255,.07);padding:8px 0;font-size:.8rem;color:#94a3b8}.landing-top-bar-inner{display:flex;align-items:center;justify-content:space-between}.top-bar-socials{display:flex;align-items:center;gap:14px}.top-social-icon{color:#94a3b8;transition:color .15s ease,transform .15s ease;display:flex;align-items:center;text-decoration:none}.top-social-icon:hover{color:#fff;transform:translateY(-1px)}.top-quick-login-btn{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--lp-radius-btn);border:1px solid rgba(255,255,255,.2);color:#fff;font-size:.76rem;font-weight:700;text-decoration:none;margin-left:14px;transition:all .18s ease}.top-quick-login-btn:hover{background:#ffffff1f;border-color:#fff;transform:translateY(-1px)}.top-lang-segmented{display:inline-flex;background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:var(--lp-radius-btn);padding:2px;gap:2px}.top-lang-btn{padding:3px 10px;border-radius:6px;border:none;font-size:.74rem;font-weight:800;cursor:pointer;background:transparent;color:#cbd5e1;transition:all .15s ease}.top-lang-btn.active{background:#fff;color:var(--lp-dark-topbar);box-shadow:0 1px 4px #0000001f}.landing-nav{position:sticky;top:0;z-index:100;background:#091a30f5;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08);transition:all .2s ease}.landing-nav-inner{display:flex;align-items:center;justify-content:space-between;height:82px;gap:24px}.landing-nav-brand-wrap{display:flex;align-items:center;flex:0 0 auto}.landing-nav-center{display:flex;align-items:center;justify-content:center;flex:1 1 auto}.landing-nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}.landing-brand{display:inline-flex;align-items:center;text-decoration:none;cursor:pointer;transition:transform .2s ease,opacity .2s ease}.landing-brand:hover{transform:translateY(-1px);opacity:.95}.landing-brand-logo-img{height:52px;width:auto;max-width:240px;object-fit:contain;display:block}.landing-nav-links{display:flex;align-items:center;gap:32px}.landing-nav-link{color:#cbd5e1;font-size:.84rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;text-decoration:none;padding:8px 0;position:relative;transition:color .18s ease}.landing-nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2.5px;background:var(--lp-btn-accent);border-radius:2px;transition:width .25s cubic-bezier(.4,0,.2,1)}.landing-nav-link:hover{color:#fff}.landing-nav-link:hover:after,.landing-nav-link.active:after{width:100%}.landing-nav-link.active{color:#fff;font-weight:700}.landing-nav-cta-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--lp-radius-btn);background:var(--lp-btn-accent);color:var(--lp-btn-accent-text);font-size:.85rem;font-weight:700;letter-spacing:.02em;text-transform:uppercase;text-decoration:none;border:none;cursor:pointer;box-shadow:0 4px 14px #d9770659;transition:all .2s cubic-bezier(.16,1,.3,1)}.landing-nav-cta-btn:hover{background:var(--lp-btn-accent-hover);transform:translateY(-1.5px);box-shadow:0 6px 20px #d9770680}.landing-hero{position:relative;padding:95px 0 115px;color:#fff;overflow:hidden;background-color:var(--lp-dark-hero)}.landing-hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(90deg,#09213de0,#0d2e54c2 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both}.landing-hero-desc{font-size:1.12rem;line-height:1.7;color:#f1f5f9;margin-bottom:34px;max-width:740px;text-shadow:0 1px 4px rgba(0,0,0,.25);animation:fadeInUp .65s cubic-bezier(.16,1,.3,1) .2s both}.landing-hero-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;animation:fadeInUp .65s cubic-bezier(.16,1,.3,1) .3s both}.landing-hero-btn-main{display:inline-flex;align-items:center;gap:10px;padding:13px 26px;border-radius:var(--lp-radius-btn);background:var(--lp-btn-accent);color:var(--lp-btn-accent-text);font-size:.96rem;font-weight:800;text-decoration:none;border:none;cursor:pointer;box-shadow:0 4px 16px #d9770666;transition:all .22s cubic-bezier(.16,1,.3,1);animation:heroPulseGlow 3s ease-in-out infinite}.landing-hero-btn-main:hover{background:var(--lp-btn-accent-hover);transform:translateY(-2px);box-shadow:0 8px 24px #d977068c}.landing-hero-btn-glass{display:inline-flex;align-items:center;gap:8px;padding:13px 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solid var(--lp-border)}.landing-about-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:stretch}.landing-about-main-card{background:linear-gradient(145deg,#f8fafc,#f1f5f9);border:1px solid #e2e8f0;border-radius:var(--lp-radius-card);padding:36px 32px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 2px 8px #0f172a08;transition:all .25s cubic-bezier(.16,1,.3,1)}.landing-about-main-card:hover{transform:translateY(-4px);border-color:#cbd5e1;box-shadow:0 12px 28px -4px #0f356012}.landing-about-tag{font-size:.74rem;font-weight:800;letter-spacing:.06em;color:#0369a1;margin-bottom:12px;text-transform:uppercase}.landing-about-main-title{font-size:1.45rem;font-weight:700;color:var(--lp-text);line-height:1.35;margin-bottom:14px}.landing-about-main-desc{font-size:.95rem;color:var(--lp-text-muted);line-height:1.65;margin-bottom:24px}.landing-about-points{display:flex;flex-direction:column;gap:12px}.landing-about-point{display:flex;align-items:flex-start;gap:10px;font-size:.9rem;color:#334155;font-weight:500}.landing-about-point-icon{width:22px;height:22px;border-radius:50%;background:#dcfce7;color:#16a34a;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.landing-about-pillars{display:flex;flex-direction:column;gap:18px}.landing-pillar-card{background:#fff;border:1px solid #e2e8f0;border-radius:var(--lp-radius-card);padding:22px;display:flex;gap:16px;align-items:flex-start;box-shadow:0 1px 4px #00000005;transition:all .25s 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#10b981;--success-light: #ecfdf5;--success-text: #065f46;--warning: #f59e0b;--warning-light: #fffbeb;--warning-text: #92400e;--danger: #ef4444;--danger-light: #fef2f2;--danger-text: #991b1b;--info: #0ea5e9;--info-light: #f0f9ff;--info-text: #0369a1;--side-bg: #0f172a;--side-surface: #1e293b;--side-text: #94a3b8;--side-text-hover: #f1f5f9;--side-active-bg: rgba(99, 102, 241, .15);--side-active-text: #a5b4fc;--side-border: rgba(255, 255, 255, .08);--board: var(--primary);--board2: var(--primary-hover);--paper: var(--bg);--ink: var(--text);--chalk: #f8fafc;--yellow: var(--warning);--red: var(--danger);--blue: var(--primary);--line: var(--border);--radius-sm: 6px;--radius: 10px;--radius-lg: 14px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .07), 0 1px 2px -1px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .04);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .04)}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}h1,h2,h3,h4,h5,h6{font-family:Inter,system-ui,-apple-system,sans-serif;font-weight:600;letter-spacing:-.015em;margin:0;color:var(--text)}@keyframes tsDropdownSlideIn{0%{opacity:0;transform:translateY(-6px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.teachsim-filter-dropdown{animation:tsDropdownSlideIn .18s cubic-bezier(.16,1,.3,1) forwards;transform-origin:top left}.app{display:flex;min-height:100vh;background:var(--bg)}.side{width:260px;background:var(--side-bg);color:var(--side-text);padding:24px 16px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;transition:width .25s cubic-bezier(.4,0,.2,1),padding .25s ease;z-index:30;overflow-x:hidden;overflow-y:auto;border-right:1px solid var(--side-border)}.side.collapsed{width:76px;padding:24px 10px}.side .logo{display:flex;align-items:center;gap:12px;margin-bottom:28px;min-width:0;text-decoration:none;cursor:default}.side.collapsed .logo{justify-content:center}.logo-badge{width:38px;height:38px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary) 0%,#6366f1 100%);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px #4f46e559}.logo-text{display:flex;flex-direction:column}.logo-text span{font-size:17px;font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.2}.logo-text small{font-size:11px;font-weight:500;color:var(--side-text);letter-spacing:.04em;text-transform:uppercase}.side-nav{display:flex;flex-direction:column;gap:4px}.side a,.side .side-nav a{display:flex;align-items:center;gap:12px;color:var(--side-text);padding:10px 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