/* Bright Top Courses — Frontend */
.btc-wrap{--navy:#1E2D6B;--navy2:#2a3f8f;--gold:#B8860B;--bg:#f0f4ff;--bd:#d0d8ee;--ok:#10b981;
  font-family:'Segoe UI','Noto Sans Arabic',Tahoma,sans-serif;direction:rtl;max-width:1100px;margin:24px auto;padding:0 16px;color:#1a1a2e}
.btc-topbar{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;border-radius:14px;padding:18px 24px;margin-bottom:20px}
.btc-welcome{font-size:1.1rem}.btc-welcome span{display:block;font-size:.78rem;opacity:.7}
.btc-signout{color:#fff;background:rgba(255,255,255,.15);padding:8px 16px;border-radius:30px;text-decoration:none;font-size:.85rem}
.btc-signout:hover{background:rgba(255,255,255,.28)}
.btc-section-title{color:var(--navy);font-size:1.4rem;margin:0 0 18px}.btc-section-title span{font-size:.8rem;color:#888;font-weight:400}

/* Grid */
.btc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.btc-card{background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s;display:block}
.btc-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(30,45,107,.16)}
.btc-card-thumb{position:relative;height:150px;background:var(--bg);display:flex;align-items:center;justify-content:center}
.btc-card-thumb img{width:100%;height:100%;object-fit:cover}.btc-thumb-ph{font-size:3rem}
.btc-badge{position:absolute;top:10px;right:10px;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:20px}
.btc-badge-done{background:#dcfce7;color:#065f46}.btc-badge-active{background:#fef9c3;color:#854d0e}
.btc-card-body{padding:14px 16px}.btc-card-body h3{margin:0 0 10px;font-size:1rem;color:var(--navy)}

/* Progress */
.btc-progress{height:8px;background:var(--bg);border-radius:10px;overflow:hidden}
.btc-progress.big{height:12px}.btc-progress.mini{height:6px;width:90px;display:inline-block;vertical-align:middle}
.btc-progress-bar{height:100%;background:linear-gradient(90deg,var(--gold),#d4a012);border-radius:10px;transition:width .4s}
.btc-progress-label{font-size:.78rem;color:#666;margin-top:6px}

/* Course view */
.btc-back{display:inline-block;color:var(--navy);text-decoration:none;font-size:.9rem;margin-bottom:14px}
.btc-course-head{background:#fff;border:1px solid var(--bd);border-radius:14px;padding:22px 24px;margin-bottom:18px}
.btc-course-head h2{margin:0 0 8px;color:var(--navy)}
.btc-course-desc{color:#555;margin:0 0 14px;font-size:.92rem}
.btc-myfiles{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:14px 18px;margin-bottom:16px}
.btc-myfiles h4{margin:0 0 8px;color:var(--navy);font-size:.95rem}
.btc-myfiles ul{margin:0;padding:0;list-style:none}.btc-myfiles li{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--bg);font-size:.88rem}
.btc-myfiles a{color:var(--gold);text-decoration:none;font-weight:600}

/* Lessons */
.btc-lessons{display:flex;flex-direction:column;gap:16px}
.btc-lesson{background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden}
.btc-lesson.is-done{border-color:var(--ok)}
.btc-lesson-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--bg)}
.btc-lesson-num{width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}
.btc-lesson-title{flex:1}.btc-lesson-title strong{display:block;color:var(--navy)}.btc-lesson-title small{color:#888;font-size:.76rem}
.btc-lesson-state{color:var(--ok);font-weight:700;font-size:.85rem}
.btc-lesson-body{display:grid;grid-template-columns:1.6fr 1fr;gap:16px;padding:18px}
@media(max-width:780px){.btc-lesson-body{grid-template-columns:1fr}}
.btc-ratio{position:relative;width:100%;padding-top:56.25%;background:#000;border-radius:10px;overflow:hidden}
.btc-ratio iframe,.btc-ratio video{position:absolute;inset:0;width:100%;height:100%;border:0}
.btc-novideo,.btc-nofile{background:var(--bg);border-radius:10px;padding:30px;text-align:center;color:#999;font-size:.85rem}
.btc-noselect{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.btc-noselect video{pointer-events:auto}
.btc-file-head{font-weight:700;color:var(--navy);margin-bottom:8px;font-size:.9rem}
.btc-file-frame{position:relative;width:100%;height:220px;border:1px solid var(--bd);border-radius:10px;overflow:hidden;margin-bottom:8px}
.btc-file-frame iframe{width:100%;height:100%;border:0}
.btc-lesson-desc{padding:0 18px 14px;color:#555;font-size:.88rem}
.btc-lesson-foot{padding:0 18px 16px}
.btc-mark{background:var(--navy);color:#fff;border:0;border-radius:30px;padding:9px 22px;cursor:pointer;font-size:.85rem;font-weight:600;transition:.2s}
.btc-mark:hover{background:var(--navy2)}.btc-mark.done{background:var(--ok)}

/* CTA */
.btc-cta{background:linear-gradient(135deg,#fff,var(--bg));border:1px solid var(--bd);border-radius:14px;padding:24px;margin-top:20px;text-align:center}
.btc-cta h3{color:var(--navy);margin:0 0 16px}
.btc-cta-row{margin:12px 0}
.btc-cta-note{font-size:.82rem;color:#777;margin-top:8px}
.btc-cta-done{background:#dcfce7;color:#065f46;display:inline-block;padding:12px 24px;border-radius:30px;font-weight:700}
.btc-cta-ship{margin-top:18px;padding-top:18px;border-top:1px dashed var(--bd)}
.btc-cta-ship-msg{color:#555;margin-bottom:12px;font-size:.92rem}

/* Buttons */
.btc-btn{display:inline-flex;flex-direction:column;align-items:center;gap:2px;background:#eef1f8;color:var(--navy);border:0;border-radius:30px;padding:12px 26px;text-decoration:none;font-weight:700;cursor:pointer;font-size:.9rem;transition:.2s}
.btc-btn small{font-size:.68rem;font-weight:400;opacity:.7}
.btc-btn:hover{transform:translateY(-2px)}
.btc-btn-primary{background:var(--navy);color:#fff}.btc-btn-gold{background:var(--gold);color:#fff}
.btc-btn-lg{padding:16px 40px;font-size:1rem}.btc-btn-block{display:flex;width:100%}.btc-btn-sm{padding:7px 16px;font-size:.8rem;flex-direction:row}

/* Login */
.btc-login-card{max-width:420px;margin:40px auto;background:#fff;border:1px solid var(--bd);border-radius:18px;overflow:hidden;box-shadow:0 8px 40px rgba(30,45,107,.12)}
.btc-login-head{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;padding:28px;text-align:center}
.btc-login-head h2{margin:0}.btc-login-head p{margin:6px 0 0;opacity:.7;font-size:.85rem}
.btc-login-form{padding:28px}
.btc-login-form label{display:block;font-weight:600;font-size:.85rem;margin:12px 0 5px}.btc-login-form label span{color:#999;font-weight:400;font-size:.75rem;margin-right:6px}
.btc-login-form input{width:100%;padding:11px 14px;border:1.5px solid var(--bd);border-radius:10px;font-size:.92rem;box-sizing:border-box}
.btc-login-form input:focus{border-color:var(--navy);outline:none;box-shadow:0 0 0 3px rgba(30,45,107,.12)}
.btc-login-form .btc-btn{margin-top:18px}
.btc-login-alt{text-align:center;padding:0 28px 24px;font-size:.85rem;color:#777}.btc-login-alt a{color:var(--gold);font-weight:600;text-decoration:none}

/* Misc */
.btc-empty{text-align:center;padding:50px 20px;color:#888}.btc-empty-icon{font-size:3rem;margin-bottom:10px}.btc-empty-sub{font-size:.82rem}
.btc-alert{padding:14px 18px;border-radius:10px;margin-bottom:14px}.btc-alert-warn{background:#fffbeb;border-right:4px solid #f59e0b;color:#92400e}