/* Courses / Estudos Module */
.courses-screen{padding:0;min-height:100vh;background:var(--gray-50)}
.courses-header{padding:16px;background:var(--white);border-bottom:1px solid var(--gray-200);position:sticky;top:0;z-index:10}
.courses-header-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.courses-header h2{font-size:20px;font-weight:700;color:var(--gray-900)}
.courses-tabs{display:flex;gap:4px;margin-bottom:12px;background:var(--gray-100);border-radius:var(--radius-lg);padding:3px}
.courses-tab{flex:1;padding:8px 12px;border:none;background:transparent;border-radius:var(--radius-md);font-size:13px;font-weight:600;color:var(--gray-500);cursor:pointer;transition:var(--transition);font-family:var(--font)}
.courses-tab.active{background:var(--white);color:var(--primary);box-shadow:var(--shadow-sm)}
.courses-search-bar{display:flex;gap:8px;margin-bottom:12px}
.courses-search-bar input{flex:1;padding:10px 14px;border:2px solid var(--gray-200);border-radius:var(--radius-md);font-size:14px;font-family:var(--font);background:var(--gray-50);transition:var(--transition)}
.courses-search-bar input:focus{outline:none;border-color:var(--primary-mid);background:var(--white)}
.courses-search-bar button{padding:10px 16px;border:none;background:var(--primary);color:var(--white);border-radius:var(--radius-md);cursor:pointer;font-size:16px;transition:var(--transition)}
.courses-search-bar button:hover{background:var(--primary-mid)}
.courses-categories{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}
.courses-categories::-webkit-scrollbar{display:none}
.courses-cat-chip{padding:6px 14px;border:1.5px solid var(--gray-200);border-radius:var(--radius-full);font-size:12px;font-weight:600;color:var(--gray-600);background:var(--white);cursor:pointer;white-space:nowrap;transition:var(--transition);font-family:var(--font)}
.courses-cat-chip.active{border-color:var(--primary);background:var(--primary-pale);color:var(--primary)}
.courses-cat-chip:hover{border-color:var(--primary-light)}

/* Grid */
.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;padding:16px}
.courses-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);cursor:pointer;transition:var(--transition);border:1px solid var(--gray-200)}
.courses-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.courses-card-thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--gray-100)}
.courses-card-thumb-placeholder{display:flex;align-items:center;justify-content:center;font-size:48px;color:var(--gray-300)}
.courses-card-body{padding:14px}
.courses-card-instructor{display:flex;align-items:center;gap:8px;margin-bottom:8px;font-size:12px;color:var(--gray-600)}
.courses-avatar-sm{width:24px;height:24px;border-radius:50%;object-fit:cover;background:var(--primary-pale);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0}
.courses-avatar-md{width:36px;height:36px;border-radius:50%;object-fit:cover;background:var(--primary-pale);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}
.courses-card-body h3{font-size:15px;font-weight:700;color:var(--gray-900);margin-bottom:4px;line-height:1.3}
.courses-card-body p{font-size:13px;color:var(--gray-500);line-height:1.4;margin-bottom:8px}
.courses-card-meta{display:flex;gap:12px;font-size:11px;color:var(--gray-400);font-weight:500}

/* List */
.courses-list{padding:16px}
.courses-list-item{display:flex;align-items:center;justify-content:space-between;padding:14px;background:var(--white);border-radius:var(--radius-md);margin-bottom:8px;box-shadow:var(--shadow-sm);cursor:pointer;transition:var(--transition);border:1px solid var(--gray-200)}
.courses-list-item:hover{box-shadow:var(--shadow-md)}
.courses-list-info{flex:1;min-width:0}
.courses-list-info h3{font-size:14px;font-weight:700;color:var(--gray-900);margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.courses-list-info span{font-size:12px;color:var(--gray-500)}
.courses-arrow{color:var(--gray-400);font-size:18px;margin-left:12px}
.courses-status-badge{display:inline-block;padding:2px 8px;border-radius:var(--radius-full);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-right:8px}
.courses-status-badge.published{background:#D4EDDA;color:#155724}
.courses-status-badge.draft{background:#FFF3CD;color:#856404}
.courses-status-badge.archived{background:var(--gray-200);color:var(--gray-600)}

/* Progress */
.courses-progress-bar{height:4px;background:var(--gray-200);border-radius:2px;overflow:hidden;margin:6px 0}
.courses-progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-light));border-radius:2px;transition:width .5s ease}

/* Empty */
.courses-empty{text-align:center;padding:60px 24px;color:var(--gray-500)}
.courses-empty-icon{font-size:48px;margin-bottom:12px}
.courses-empty strong{display:block;font-size:16px;color:var(--gray-700);margin-bottom:4px}
.courses-empty p{font-size:13px;margin-bottom:16px}

/* Loading */
.courses-loading{display:flex;justify-content:center;padding:40px}
.courses-spinner{width:32px;height:32px;border:3px solid var(--gray-200);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Detail */
.courses-detail{padding-bottom:80px}
.courses-back-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;background:var(--white);border-radius:var(--radius-md);font-size:14px;font-weight:600;color:var(--primary);cursor:pointer;margin:12px 16px;box-shadow:var(--shadow-sm);font-family:var(--font);transition:var(--transition)}
.courses-back-btn:hover{background:var(--primary-pale)}
.courses-detail-banner{width:100%;max-height:240px;object-fit:cover}
.courses-detail-header{padding:16px;background:var(--white);border-bottom:1px solid var(--gray-200)}
.courses-detail-header h1{font-size:22px;font-weight:800;color:var(--gray-900);margin-bottom:12px}
.courses-detail-meta{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:12px}
.courses-detail-instructor{display:flex;align-items:center;gap:10px}
.courses-detail-instructor div{display:flex;flex-direction:column}
.courses-detail-instructor strong{font-size:14px;color:var(--gray-900)}
.courses-detail-instructor span{font-size:12px;color:var(--gray-500)}
.courses-detail-stats{display:flex;gap:16px;font-size:12px;color:var(--gray-500);flex-wrap:wrap}
.courses-detail-desc{font-size:14px;color:var(--gray-600);line-height:1.6;margin:12px 0}
.courses-enrolled-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:#D4EDDA;color:#155724;border-radius:var(--radius-full);font-size:13px;font-weight:600}
.courses-owner-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}

/* Modules */
.courses-modules{padding:16px}
.courses-module{margin-bottom:16px;background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--gray-200)}
.courses-module-header{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:var(--gray-50);border-bottom:1px solid var(--gray-200)}
.courses-module-header h3{font-size:15px;font-weight:700;color:var(--gray-900)}
.courses-module>p{padding:8px 16px;font-size:13px;color:var(--gray-500)}
.courses-lessons{padding:0}
.courses-lesson{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--gray-100);transition:var(--transition)}
.courses-lesson:last-child{border-bottom:none}
.courses-lesson.clickable{cursor:pointer}
.courses-lesson.clickable:hover{background:var(--gray-50)}
.courses-lesson-icon{font-size:20px;flex-shrink:0}
.courses-lesson-info{flex:1;min-width:0}
.courses-lesson-info span{display:block;font-size:13px;font-weight:600;color:var(--gray-800);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.courses-lesson-info small{font-size:11px;color:var(--gray-400)}
.courses-lesson-check{color:var(--gray-300);font-size:18px}

/* Lesson View */
.courses-lesson-view{padding:16px;padding-bottom:80px}
.courses-lesson-view h2{font-size:20px;font-weight:700;color:var(--gray-900);margin:12px 0 8px}
.courses-lesson-view>p{font-size:14px;color:var(--gray-600);margin-bottom:16px}
.courses-video-player{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:16px;background:#000}
.courses-video-player video{width:100%;max-height:400px;display:block}
.courses-video-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px;background:var(--gray-100);border-radius:var(--radius-lg);color:var(--gray-400);margin-bottom:16px}
.courses-video-placeholder span{font-size:48px;margin-bottom:8px}
.courses-text-content{padding:16px;background:var(--white);border-radius:var(--radius-lg);font-size:14px;line-height:1.8;color:var(--gray-700);margin-bottom:16px;box-shadow:var(--shadow-sm)}
.courses-completed-badge{display:flex;align-items:center;justify-content:center;gap:6px;padding:12px;background:#D4EDDA;color:#155724;border-radius:var(--radius-lg);font-weight:700;font-size:14px}

/* Buttons */
.courses-btn-primary{padding:10px 20px;border:none;background:var(--primary);color:var(--white);border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font)}
.courses-btn-primary:hover{background:var(--primary-mid)}
.courses-btn-outline{padding:10px 20px;border:2px solid var(--primary);background:transparent;color:var(--primary);border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font)}
.courses-btn-outline:hover{background:var(--primary-pale)}
.courses-btn-danger{padding:10px 20px;border:none;background:var(--red);color:var(--white);border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font)}
.courses-btn-danger:hover{opacity:.9}
.courses-btn-full{width:100%;text-align:center}
.courses-btn-sm{padding:6px 12px;border:none;background:var(--primary-pale);color:var(--primary);border-radius:var(--radius-sm);font-size:12px;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font)}
.courses-btn-sm:hover{background:var(--primary);color:var(--white)}

/* Modal */
.courses-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:flex-end;justify-content:center;z-index:9999;backdrop-filter:blur(4px)}
.courses-modal-overlay.show{display:flex}
.courses-modal{background:var(--white);border-radius:var(--radius-xl) var(--radius-xl) 0 0;width:100%;max-width:480px;max-height:85vh;overflow-y:auto;animation:slideUp .3s ease}
.courses-modal-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--gray-200);position:sticky;top:0;background:var(--white);z-index:1}
.courses-modal-head h3{font-size:18px;font-weight:700}
.courses-modal-head button{width:32px;height:32px;border:none;background:var(--gray-100);border-radius:50%;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.courses-modal-head button:hover{background:var(--gray-200)}
.courses-modal-body{padding:20px}
.courses-modal-body .form-group{margin-bottom:16px}
.courses-modal-body label{display:block;font-size:12px;font-weight:600;color:var(--gray-700);margin-bottom:6px}
.courses-modal-body input,.courses-modal-body select,.courses-modal-body textarea{width:100%;padding:10px 14px;border:2px solid var(--gray-200);border-radius:var(--radius-md);font-size:14px;font-family:var(--font);transition:var(--transition);background:var(--gray-50)}
.courses-modal-body input:focus,.courses-modal-body select:focus,.courses-modal-body textarea:focus{outline:none;border-color:var(--primary-mid);background:var(--white)}

/* Desktop responsive */
@media(min-width:768px){
  .courses-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;padding:20px}
  .courses-header{padding:20px 24px}
}