@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap";:root{--bg-primary:#fff;--bg-secondary:#f9fafb;--bg-tertiary:#f0f2f4;--text-primary:#10192d;--text-secondary:#607085;--text-tertiary:#a2abb9;--color-primary:#3c83f6;--color-primary-hover:#156bf4;--color-primary-light:#ecf3fe;--color-accent:#65758b;--color-accent-hover:#4f5c6d;--color-accent-light:#f0f2f5;--color-success:#21ab54;--color-success-light:#e9fbf0;--border-color:#0f172a0d;--border-color-hover:#0f172a1a;--shadow-sm:0 2px 8px -1px #00000005, 0 1px 3px -1px #00000003;--shadow-md:0 8px 16px -4px #00000008, 0 3px 6px -2px #00000003;--shadow-lg:0 20px 40px -8px #0000000a, 0 8px 16px -4px #00000005;--shadow-tooltip:0 4px 20px -2px #0000000f, 0 2px 8px -1px #0000000a;--radius-xs:6px;--radius-sm:10px;--radius-md:14px;--radius-lg:20px;--radius-full:9999px;--transition-spring:all .5s cubic-bezier(.34, 1.6, .64, 1);--transition-smooth:all .3s cubic-bezier(.25, .8, .25, 1);--transition-fast:all .15s cubic-bezier(.25, .8, .25, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;font-family:Plus Jakarta Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;overflow-x:hidden}h1,h2,h3,h4,h5,h6{color:var(--text-primary);letter-spacing:-.02em;font-weight:700;line-height:1.25}p{color:var(--text-secondary)}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.main-header{z-index:100;-webkit-backdrop-filter:blur(16px)saturate(190%);border-bottom:1px solid var(--border-color);transition:var(--transition-smooth);background-color:#fffc;position:sticky;top:0}.main-header.scrolled{box-shadow:var(--shadow-sm);background-color:#fffffff2}.header-container{justify-content:space-between;align-items:center;height:4.5rem;display:flex}.logo{color:var(--text-primary);letter-spacing:-.03em;cursor:pointer;align-items:center;gap:.6rem;font-size:1.35rem;font-weight:800;display:flex}.logo-icon{background:var(--color-primary);color:#fff;width:1.8rem;height:1.8rem;box-shadow:var(--shadow-sm);border-radius:6px;justify-content:center;align-items:center;display:flex}.logo-text span{color:var(--color-primary)}.app-content{min-height:calc(100vh - 4.5rem);padding:0}.tab-panel{padding:2.5rem 0;animation:.4s cubic-bezier(.25,.8,.25,1) fadeIn;display:none}.tab-panel.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pageFadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.btn{border-radius:var(--radius-md);cursor:pointer;color:var(--text-primary);transition:var(--transition-smooth);-webkit-user-select:none;user-select:none;background-color:#0000;border:1px solid #0000;outline:none;justify-content:center;align-items:center;gap:.5rem;padding:.7rem 1.4rem;font-family:inherit;font-size:.9rem;font-weight:600;display:inline-flex}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(1px)}.btn-primary{background-color:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background-color:var(--color-primary-hover);box-shadow:var(--shadow-md)}.btn-outline{border-color:var(--border-color);background-color:var(--bg-primary)}.btn-outline:hover{background-color:var(--bg-secondary);border-color:var(--text-tertiary)}.btn-ghost{color:var(--text-secondary)}.btn-ghost:hover{color:var(--text-primary);background-color:var(--bg-secondary)}.portal-container{flex-direction:column;gap:2rem;display:flex}.portal-header{border-bottom:1px solid var(--border-color);margin-bottom:1rem;padding-bottom:1.5rem}.portal-welcome h2{margin-bottom:.2rem;font-size:1.7rem}.portal-welcome p{font-size:.9rem}.course-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.8rem;display:grid}.course-card{background-color:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);transition:var(--transition-smooth);flex-direction:column;height:100%;display:flex;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.course-banner{background-color:var(--bg-secondary);border-bottom:1px solid var(--border-color);letter-spacing:.05em;height:8rem;color:var(--color-primary);justify-content:center;align-items:center;font-size:1.1rem;font-weight:800;display:flex}.course-body{flex-direction:column;flex-grow:1;padding:1.5rem;display:flex}.course-title{margin-bottom:.5rem;font-size:1.15rem}.course-desc{color:var(--text-secondary);flex-grow:1;margin-bottom:1.2rem;font-size:.85rem}.course-meta{color:var(--text-secondary);background-color:var(--bg-secondary);border-radius:var(--radius-xs);align-items:center;width:fit-content;margin-bottom:1rem;padding:.4rem .8rem;font-size:.75rem;font-weight:700;display:flex}.course-progress-container{margin-bottom:1.2rem}.course-progress-header{color:var(--text-secondary);justify-content:space-between;margin-bottom:.3rem;font-size:.75rem;font-weight:700;display:flex}.course-progress-bar{background-color:var(--bg-tertiary);border-radius:var(--radius-full);height:5px;overflow:hidden}.course-progress-fill{background-color:var(--color-primary);border-radius:var(--radius-full);height:100%;transition:width .6s}@media (width<=768px){.course-grid{grid-template-columns:1fr}}.login-gate-overlay{background-color:var(--bg-primary);z-index:1000;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.login-card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;max-width:420px;box-shadow:var(--shadow-lg);text-align:center;padding:3rem 2.5rem;animation:.5s cubic-bezier(.25,.8,.25,1) pageFadeIn}.login-title{color:var(--text-primary);margin-top:1rem;margin-bottom:.5rem;font-size:1.6rem;font-weight:800}.login-subtitle{color:var(--text-secondary);margin-bottom:2rem;font-size:.9rem;line-height:1.5}.login-google-btn{border-radius:var(--radius-md);cursor:pointer;background-color:var(--text-primary);color:#fff;width:100%;transition:var(--transition-smooth);border:none;justify-content:center;align-items:center;gap:.8rem;padding:.85rem;font-size:.95rem;font-weight:700;display:flex}.login-google-btn:hover{box-shadow:var(--shadow-md);background-color:#1e293b;transform:translateY(-2px)}.login-google-btn svg{background:#fff;border-radius:50%;padding:2px}.login-error{color:#ef4444;min-height:1.2rem;margin-top:1.2rem;font-size:.8rem;font-weight:600;line-height:1.4}.user-profile{border-left:1px solid var(--border-color);align-items:center;gap:.8rem;margin-left:1.5rem;padding-left:1.5rem;display:flex}.user-email{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;max-width:180px;font-size:.8rem;font-weight:600;overflow:hidden}.btn-signout{border-radius:var(--radius-xs)!important;padding:.4rem .8rem!important;font-size:.75rem!important;font-weight:700!important}