:root{--ink:#e9edf7;--muted:#a8b1c5;--bg:#0b1020;--panel:#141c30;--line:#27324a;--primary:#7568ff}*{box-sizing:border-box}body{background:#0b1020;color:var(--ink);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}a{color:#a9a2ff;text-decoration:none}a:hover{color:#d0ccff}.site-nav{background:#10182a;border-bottom:1px solid #25304a}.navbar-brand{font-size:1.4rem}.navbar-brand span{color:#8b80ff}.nav-link{color:#c6cee0!important}.btn-primary{background:#6d63f5;border-color:#6d63f5}.btn-primary:hover{background:#574ce0;border-color:#574ce0}.btn-outline-light{border-color:#53617c}.hero-section{background:radial-gradient(ellipse at 75% 20%,#29265a 0%,#111a32 42%,#0b1020 78%);border-bottom:1px solid #202a40}.hero-section .container{max-width:1180px}.eyebrow{font-size:.72rem;font-weight:800;letter-spacing:.15em;color:#9d96ff}.gradient-text{background:linear-gradient(90deg,#a9a2ff,#68d9d0);-webkit-background-clip:text;background-clip:text;color:transparent}.text-secondary{color:#a8b1c5!important}.hero-stats{display:flex;gap:2.5rem;flex-wrap:wrap}.hero-stats div{display:flex;flex-direction:column}.hero-stats strong{font-size:1.35rem}.hero-stats span,.course-level{font-size:.8rem;color:#9da9c0}.code-card,.mini-editor,.content-panel,.feature-card,.course-card,.auth-card,.stat-card{background:#141c30;border:1px solid #28334d;border-radius:18px}.code-card{overflow:hidden;box-shadow:0 25px 70px #0005}.code-top{background:#202b43;padding:13px 18px;display:flex;align-items:center;gap:7px;color:#aab4c9;font-size:.8rem}.code-top i{width:9px;height:9px;border-radius:50%;background:#fa7b78}.code-top i:nth-child(2){background:#f5c56b}.code-top i:nth-child(3){background:#6dd6a1}.code-top span{margin-left:12px}.code-card pre{padding:24px 22px;color:#d8e1f4;min-height:245px}.code-purple{color:#b6a5ff}.code-pink{color:#ff91c7}.code-result{background:#10182a;padding:14px 20px;color:#b9c5d9;font-size:.85rem}.section-heading{max-width:650px;margin-bottom:2rem}.section-heading h2{font-size:2.2rem;font-weight:750;margin-top:.7rem}.section-heading p{color:var(--muted)}.course-card{display:block;height:100%;padding:25px;color:var(--ink);transition:.2s}.course-card:hover{transform:translateY(-4px);border-color:#7168ed;color:white}.course-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:13px;background:#292753;color:#bdb7ff;font-weight:800;font-size:1.1rem;margin-bottom:20px}.course-card h3{font-size:1.25rem}.course-card p{color:#a8b1c5;min-height:48px}.alt-section{background:#111a2e;border-block:1px solid #25304a}.mini-editor{padding:18px}.editor-tabs{display:flex;gap:20px;border-bottom:1px solid #34415b;padding-bottom:12px;color:#9eaac0}.editor-tabs b{color:#bcb5ff}.mini-editor pre{padding:20px 5px;color:#c7d1e5}.mini-preview{background:#f5f6fb;color:#1b2234;padding:20px;border-radius:10px}.feature-card{padding:25px}.feature-card h5{color:#b9b3ff}.site-footer{background:#080d19;border-top:1px solid #273149}.site-footer a{display:block;margin:.5rem 0;color:#aab5cb}.auth-wrap{min-height:65vh;display:grid;place-items:center;padding:50px 16px}.auth-card{width:min(100%,480px);padding:32px}.auth-card h1{font-weight:750;margin:10px 0 20px}.form-control,.form-select{background:#0d1527;border-color:#35415a;color:#edf1fa}.form-control:focus,.form-select:focus{background:#0d1527;color:white;border-color:#8177ff;box-shadow:0 0 0 .2rem #7568ff33}.content-panel{padding:25px}.lesson-row,.ad-admin-row{display:flex;justify-content:space-between;gap:15px;padding:13px 0;border-bottom:1px solid #29344b;color:#e5eaf5}.lesson-row small{color:#9da9c0}.lesson-content{font-size:1.05rem;line-height:1.85;color:#d1d8e7}.lesson-code,.python-output{background:#080e1b;border:1px solid #27334a;color:#d4def0;border-radius:12px;padding:20px;overflow:auto}.stat-card{padding:24px;display:flex;flex-direction:column;gap:8px}.stat-card span{color:#aab5ca}.stat-card strong{font-size:2rem}.playground{background:#121b2e;border:1px solid #2a3650;border-radius:18px;padding:20px;margin-top:25px}.editor-label{font-size:.75rem;font-weight:800;letter-spacing:.12em;color:#aaa4ff;margin-bottom:8px}.code-input{width:100%;min-height:220px;background:#080e1b;color:#d8e2f5;border:1px solid #2d3a55;border-radius:10px;padding:15px;font:13px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;resize:vertical}.code-small{min-height:120px}.preview-frame{width:100%;height:440px;background:#fff;border:0;border-radius:10px}.python-output{min-height:90px}.empty-state{padding:40px;text-align:center;background:#141c30;border-radius:16px;color:#aab5ca}.ad-slot{max-width:100%;overflow:hidden;text-align:center;margin:12px auto;padding:4px}.ad-slot iframe,.ad-slot img{max-width:100%}@media(max-width:767px){.hero-section h1{font-size:2.6rem}.hero-stats{gap:1.3rem}.section-heading h2{font-size:1.8rem}.auth-card{padding:24px}}