@import"https://fonts.googleapis.com/css2?family=Quicksand:wght@400;500;600;700&family=Poppins:wght@300;400;500;600;700&display=swap";.optimized-image{position:relative;overflow:hidden}.optimized-image img{width:100%;height:100%;object-fit:cover;display:block}.image-placeholder{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0,#f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s infinite;display:flex;align-items:center;justify-content:center;color:#666;font-size:.9rem}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}@media(max-width:768px){.image-placeholder{font-size:.8rem}}.password-strength{margin-top:.5rem;padding:.75rem;background-color:#f9fafb;border-radius:.375rem;font-size:.875rem}.strength-indicator{margin-bottom:.5rem;font-weight:600}.password-checklist{list-style:none;padding:0;margin:0}.password-checklist li{padding:.25rem 0;font-size:.875rem}:root{--primary-color: 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1200px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-body);font-size:var(--fs-base);color:var(--gray-dark);line-height:1.6;background-color:var(--white);overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;color:var(--black);line-height:1.2}a{text-decoration:none;color:inherit}img{max-width:100%;height:auto;display:block}ul{list-style:none}button{font-family:inherit;border:none;cursor:pointer;background:none}input,textarea{font-family:inherit;border:none;outline:none}.container{max-width:var(--container-width);margin:0 auto;padding:0 var(--spacing-md)}.section{padding:var(--spacing-xxl) 0}.section__header{text-align:center;margin-bottom:var(--spacing-xl)}.section__label{display:inline-block;padding:var(--spacing-xs) var(--spacing-md);background-color:var(--beige-light);color:var(--primary-color);font-size:var(--fs-sm);font-weight:600;border-radius:var(--radius-md);margin-bottom:var(--spacing-sm);text-transform:uppercase;letter-spacing:1px}.section__title{font-size:var(--fs-lg);color:var(--black);margin-bottom:var(--spacing-sm)}.button{display:inline-block;padding:.875rem 2rem;font-size:var(--fs-base);font-weight:600;border-radius:var(--radius-md);transition:var(--transition);text-align:center;cursor:pointer;border:2px solid transparent}.button--primary{background-color:var(--primary-color);color:var(--white);border-color:var(--primary-color)}.button--primary:hover{background-color:#085269;border-color:#085269;transform:translateY(-2px);box-shadow:var(--shadow-md)}.button--secondary{background-color:transparent;color:var(--primary-color);border-color:var(--primary-color)}.button--secondary:hover{background-color:var(--primary-color);color:var(--white);transform:translateY(-2px);box-shadow:var(--shadow-md)}.header{position:fixed;top:0;left:0;width:100%;background-color:var(--white);box-shadow:var(--shadow-sm);z-index:1000;transition:var(--transition)}.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-height)}.nav__logo{display:flex;align-items:center;height:75px}.nav__logo img{height:100%;width:auto;object-fit:contain}.nav__list{display:flex;align-items:center;gap:var(--spacing-lg)}.nav__link{position:relative;font-weight:500;color:var(--gray-dark);transition:var(--transition);padding:var(--spacing-xs) 0;cursor:pointer}.nav__link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--primary-color);transition:var(--transition)}.nav__link:hover,.nav__link.active-link{color:var(--primary-color)}.nav__link:hover:after,.nav__link.active-link:after{width:100%}.nav__cta{padding:.75rem 1.5rem;background-color:var(--primary-color);color:var(--white);font-weight:600;border-radius:var(--radius-md);transition:var(--transition);cursor:pointer}.nav__cta:hover{background-color:#085269;transform:translateY(-2px);box-shadow:var(--shadow-sm)}.hero{margin-top:var(--header-height);background:linear-gradient(135deg,var(--beige-light) 0%,var(--white) 100%);min-height:calc(100vh - var(--header-height));display:flex;align-items:center}.hero__container{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-xl);align-items:center}.hero__title{font-size:var(--fs-xl);color:var(--black);margin-bottom:var(--spacing-md);line-height:1.1}.hero__subtitle{font-size:1.125rem;color:var(--gray-dark);margin-bottom:var(--spacing-lg);line-height:1.7}.hero__buttons{display:flex;gap:var(--spacing-md);flex-wrap:wrap}.hero__image img{width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.about{background-color:var(--white)}.about__content{display:grid;grid-template-columns:1fr 2fr;gap:var(--spacing-xl);align-items:center;max-width:1000px;margin:0 auto}.about__image img{width:100%;max-width:400px;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.about__name{font-size:var(--fs-md);color:var(--primary-color);margin-bottom:var(--spacing-sm)}.about__bio,.about__mission{font-size:1.05rem;color:var(--gray-dark);margin-bottom:var(--spacing-md);line-height:1.8}.services{background-color:var(--beige-light)}.services__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-lg)}.service__card{background-color:var(--white);padding:var(--spacing-xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition);text-align:center}.service__card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.service__icon{width:80px;height:80px;margin:0 auto var(--spacing-md);display:flex;align-items:center;justify-content:center;background-color:var(--beige-light);border-radius:50%;color:var(--primary-color)}.service__title{font-size:1.35rem;color:var(--black);margin-bottom:var(--spacing-sm)}.service__description{color:var(--gray-dark);margin-bottom:var(--spacing-md);line-height:1.7}.service__link{color:var(--primary-color);font-weight:600;transition:var(--transition);cursor:pointer}.service__link:hover{color:var(--accent-color)}.service__features{list-style:none;margin:var(--spacing-md) 0;text-align:left}.service__features li{padding:var(--spacing-xs) 0;color:var(--gray-dark);position:relative;padding-left:var(--spacing-md)}.service__features li:before{content:"✓";position:absolute;left:0;color:var(--primary-color);font-weight:700}.services__info{margin-top:var(--spacing-xxl)}.info__card{background-color:var(--white);padding:var(--spacing-xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);text-align:center;max-width:600px;margin:0 auto}.info__card h3{color:var(--primary-color);margin-bottom:var(--spacing-md);font-size:1.5rem}.info__card ul{list-style:none;text-align:left;max-width:400px;margin:0 auto}.info__card li{padding:var(--spacing-xs) 0;color:var(--gray-dark);font-weight:500}.subjects{background-color:var(--white)}.subjects__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--spacing-lg)}.subject__card{background-color:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);transition:var(--transition)}.subject__card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.subject__image{width:100%;height:240px;overflow:hidden}.subject__image img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}.subject__content{padding:var(--spacing-lg)}.subject__title{font-size:1.35rem;color:var(--black);margin-bottom:var(--spacing-sm)}.subject__description{color:var(--gray-dark);margin-bottom:var(--spacing-md);line-height:1.7}.subject__button{width:100%}.testimonials{background-color:var(--beige-light)}.testimonials__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-lg)}.testimonial__card{background-color:var(--white);padding:var(--spacing-xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition)}.testimonial__card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.testimonial__quote{color:var(--primary-color);opacity:.3;margin-bottom:var(--spacing-md)}.testimonial__text{font-size:1.05rem;color:var(--gray-dark);line-height:1.8;margin-bottom:var(--spacing-lg);font-style:italic}.testimonial__author{border-top:2px solid var(--beige-light);padding-top:var(--spacing-md)}.testimonial__name{font-size:1.1rem;color:var(--black);margin-bottom:var(--spacing-xs)}.testimonial__role{font-size:var(--fs-sm);color:var(--accent-color)}.contact{background-color:var(--white)}.contact__content{display:grid;grid-template-columns:1.5fr 1fr;gap:var(--spacing-xl);max-width:1000px;margin:0 auto}.contact__form{background-color:var(--beige-light);padding:var(--spacing-xl);border-radius:var(--radius-lg)}.form__group{margin-bottom:var(--spacing-lg)}.form__label{display:block;font-weight:600;color:var(--black);margin-bottom:var(--spacing-sm);font-size:.95rem}.form__input,.form__textarea{width:100%;padding:.875rem 1rem;background-color:var(--white);border:2px solid #e0e0e0;border-radius:var(--radius-md);font-size:var(--fs-base);color:var(--gray-dark);transition:var(--transition)}.form__input:focus,.form__textarea:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px 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h2{font-size:2rem;margin-bottom:1rem;color:#2c3e50}.dashboard__container h3{font-size:1.5rem;margin:1.5rem 0 1rem;color:#34495e}.dashboard__container ul{list-style:none;padding:0}.dashboard__container li{background:#f7f9fa;margin:.5rem 0;padding:.75rem;border-radius:8px;transition:transform .2s ease}.dashboard__container li:hover{transform:scale(1.02);background:#eaf2f8}.dashboard__admin .admin__actions{display:flex;justify-content:space-evenly;margin-top:1rem}.dashboard__admin .admin__button{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:.2rem;background:#2c3e50;color:#fff;padding:.5rem;border-radius:10px;border:none;cursor:pointer;width:90px;transition:background .3s ease,transform .2s ease}.dashboard__admin .admin__button:hover{background:#34495e;transform:scale(1.05)}.dashboard__admin .admin__icon{font-size:1rem}.dashboard__admin .admin__label{font-size:.9rem;font-weight:500}.courses-manager,.users-manager{padding:2rem;background:#fff;border-radius:12px;box-shadow:0 4px 12px #0000001a;margin:var(--spacing-xl) auto;max-width:900px}.admin__container{max-width:1200px;margin:0 auto}.admin__filters{display:flex;gap:var(--spacing-md);margin-bottom:var(--spacing-lg);justify-content:center}.filter__button{padding:.75rem 1.5rem;background:var(--gray-light);color:var(--gray-dark);border:2px solid transparent;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:var(--transition)}.filter__button.active{background:var(--primary-color);color:var(--white);border-color:var(--primary-color)}.filter__button:hover{background:var(--primary-color);color:var(--white)}.admin__empty{text-align:center;padding:var(--spacing-xl);color:var(--gray-medium);font-size:1.1rem}.admin__table-container{overflow-x:auto;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.admin__table{width:100%;border-collapse:collapse;background:var(--white)}.admin__table th{background:var(--primary-color);color:var(--white);padding:1rem;text-align:left;font-weight:600;font-size:.95rem}.admin__table td{padding:1rem;border-bottom:1px solid var(--gray-light);color:var(--gray-dark)}.admin__table tr:hover{background:var(--beige-light)}.status{display:inline-block;padding:.375rem .875rem;border-radius:var(--radius-md);font-size:.875rem;font-weight:600;text-transform:uppercase}.status--pending{background:#fef3c7;color:#92400e}.status--approved{background:#d1fae5;color:#065f46}.status--rejected{background:#fee2e2;color:#991b1b}.admin__actions-buttons{display:flex;gap:.5rem}.button--success{background:#10b981;color:var(--white);padding:.5rem 1rem;border-radius:var(--radius-md);font-weight:600;transition:var(--transition)}.button--success:hover{background:#059669;transform:translateY(-2px)}.button--danger{background:#ef4444;color:var(--white);padding:.5rem 1rem;border-radius:var(--radius-md);font-weight:600;transition:var(--transition)}.button--danger:hover{background:#dc2626;transform:translateY(-2px)}.dashboard__user{max-width:700px;margin:0 auto}.enrolled-section{margin-bottom:var(--spacing-xl);padding-bottom:var(--spacing-lg);border-bottom:2px solid var(--beige-light)}.enrolled-courses-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.enrolled-course-card{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:var(--white);border:2px solid var(--beige-light);border-radius:var(--radius-md);transition:var(--transition)}.enrolled-course-card:hover{border-color:var(--primary-color);box-shadow:var(--shadow-sm)}.enrolled-course-title{font-weight:500;color:var(--gray-dark);font-size:1.05rem}.user-panel__header{text-align:center;margin-bottom:var(--spacing-xl)}.user-panel__header h3{color:var(--primary-color);font-size:1.75rem;margin-bottom:var(--spacing-sm)}.user-panel__header p{color:var(--gray-dark);font-size:1.05rem}.courses-selection-list{display:flex;flex-direction:column;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg);max-height:400px;overflow-y:auto;padding:var(--spacing-sm)}.course-item{display:flex;align-items:center;padding:var(--spacing-md);background:var(--beige-light);border:2px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);position:relative}.course-item:hover{background:#e8dfd0;border-color:var(--primary-color);transform:translate(4px)}.course-item input[type=checkbox]{display:none}.course-item .course-title{flex:1;font-weight:500;color:var(--gray-dark);font-size:1.05rem}.course-item .course-checkmark{width:24px;height:24px;border:2px solid var(--gray-medium);border-radius:4px;display:flex;align-items:center;justify-content:center;color:transparent;font-weight:700;transition:var(--transition);margin-right:var(--spacing-sm)}.course-item 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2rem;background:var(--primary-color);color:var(--white);border:none;border-radius:var(--radius-md);font-size:1.1rem;font-weight:600;cursor:pointer;transition:var(--transition)}.enroll-button:hover:not(:disabled){background:#085269;transform:translateY(-2px);box-shadow:var(--shadow-md)}.enroll-button:disabled{background:var(--gray-medium);cursor:not-allowed;opacity:.6}.courses-table,.users-table{width:100%;border-collapse:collapse;font-size:.95rem}.courses-table th,.users-table th{background:#2c3e50;color:#fff;padding:.75rem;text-align:left}.courses-table td,.users-table td{padding:.75rem;border-bottom:1px solid #e0e0e0}.courses-table tr:hover,.users-table tr:hover{background:#f7f9fa}.courses-table button,.users-table button{background:#3498db;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer;transition:background .3s ease}.courses-table button:hover,.users-table button:hover{background:#2980b9}.buttons-group{display:flex;justify-content:space-evenly}.return-button,.create-button,.send-button{background:#2c3e50;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer;margin-bottom:1rem;transition:background .3s ease}.return-button:hover,.create-button,.send-button{background:#34495e}.create-form{display:flex;flex-direction:column;gap:.5rem;margin:1rem 10rem}.create-form input,.create-form select{padding:.5rem;border:1px solid #ccc;border-radius:6px}.actions-cell{display:flex;gap:.5rem}.pagination{display:flex;justify-content:center;gap:1.5rem;margin-top:1rem}.footer{background-color:var(--black);color:var(--white);padding:var(--spacing-lg) 0 var(--spacing-sm)}.footer__content{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--spacing-lg);margin-bottom:var(--spacing-md)}.footer__title{font-size:1.25rem;margin-bottom:var(--spacing-sm)}.footer__description{line-height:1.6;opacity:.8;font-size:.95rem}.footer__links-title,.footer__contact-title{font-size:1.1rem;margin-bottom:var(--spacing-sm)}.footer__list{display:flex;flex-direction:column;gap:var(--spacing-xs)}.footer__link{opacity:.8;transition:var(--transition);cursor:pointer;font-size:.95rem}.footer__link:hover{opacity:1;color:var(--primary-color);transform:translate(4px)}.footer__contact-item,.footer__contact-item span{display:flex;align-items:center;gap:var(--spacing-xs);margin-bottom:var(--spacing-xs);opacity:.8;font-size:.95rem}.footer__contact-item span .wapp,.mail,.insta{transition:var(--transition);cursor:pointer}.footer__contact-item span .wapp:hover,.mail:hover,.insta:hover{transform:rotate(360deg) scale(2)}.footer__contact-item span .wapp:hover{color:#adff2f}.footer__contact-item span .mail:hover{color:#0ff}.footer__contact-item span .insta:hover{color:#f0f}.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:var(--spacing-sm);text-align:center}.footer__copyright{opacity:.7;font-size:.85rem}.teacher-panel{max-width:1200px;margin:0 auto;padding:var(--spacing-xl)}.teacher-panel__header{text-align:center;margin-bottom:var(--spacing-xl)}.teacher-panel__title{font-size:2.5rem;color:var(--primary-color);margin-bottom:var(--spacing-xs)}.teacher-panel__subtitle{font-size:1.1rem;color:var(--gray-medium)}.teacher-panel__stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xxl)}.stat-card{background:linear-gradient(135deg,var(--white) 0%,var(--beige-light) 100%);padding:var(--spacing-xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);text-align:center;transition:var(--transition);border:2px solid transparent}.stat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.stat-card--primary{background:linear-gradient(135deg,#0a6883,#0d7fa0);color:var(--white)}.stat-card--secondary{background:linear-gradient(135deg,#708c87,#8aa39e);color:var(--white)}.stat-card__icon{font-size:3rem;margin-bottom:var(--spacing-sm);opacity:.9}.stat-card__value{font-size:3rem;font-weight:700;margin-bottom:var(--spacing-xs);font-family:var(--font-heading)}.stat-card__label{font-size:1rem;font-weight:500;opacity:.9;text-transform:uppercase;letter-spacing:1px}.teacher-courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:var(--spacing-lg)}.teacher-course-card{background:var(--white);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-md);transition:var(--transition);border:2px solid var(--beige-light);display:flex;flex-direction:column}.teacher-course-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.teacher-course-card__header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-md);gap:var(--spacing-sm)}.teacher-course-card__title{font-size:1.5rem;color:var(--black);margin:0;flex:1}.teacher-course-card__badge{background:#d1fae5;color:#065f46;padding:.375rem .875rem;border-radius:var(--radius-md);font-size:.75rem;font-weight:600;text-transform:uppercase;white-space:nowrap}.teacher-course-card__description{color:var(--gray-dark);line-height:1.7;margin-bottom:var(--spacing-lg);flex:1}.teacher-course-card__footer{display:flex;justify-content:space-between;align-items:center;padding-top:var(--spacing-md);border-top:2px solid var(--beige-light)}.teacher-course-card__info{display:flex;gap:var(--spacing-md)}.info-item{display:flex;align-items:center;gap:var(--spacing-xs);color:var(--gray-dark);font-weight:500;font-size:.95rem}.teacher-course-card__button{background:var(--primary-color);color:var(--white);padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:600;transition:var(--transition);border:none;cursor:pointer}.teacher-course-card__button:hover{background:#085269;transform:translate(4px)}.teacher-detail{max-width:1200px;margin:0 auto;padding:var(--spacing-xl)}.teacher-detail__back{background:var(--gray-light);color:var(--gray-dark);padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:600;transition:var(--transition);border:2px solid transparent;cursor:pointer;margin-bottom:var(--spacing-lg)}.teacher-detail__back:hover{background:var(--primary-color);color:var(--white);border-color:var(--primary-color);transform:translate(-4px)}.teacher-detail__header{text-align:center;margin-bottom:var(--spacing-xl);padding:var(--spacing-xl);background:linear-gradient(135deg,var(--primary-color) 0%,#0d7fa0 100%);color:var(--white);border-radius:var(--radius-lg)}.teacher-detail__title{font-size:2.5rem;margin-bottom:var(--spacing-sm)}.teacher-detail__description{font-size:1.1rem;opacity:.9;max-width:800px;margin:0 auto}.teacher-detail__stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xxl)}.teacher-detail__section{margin-bottom:var(--spacing-xxl)}.section-title{font-size:1.75rem;color:var(--primary-color);margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-sm);border-bottom:3px solid var(--beige-light)}.students-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--spacing-md)}.student-card{display:flex;align-items:center;gap:var(--spacing-md);background:var(--white);padding:var(--spacing-lg);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition);border:2px solid var(--beige-light)}.student-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--primary-color)}.student-card__avatar{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,var(--primary-color) 0%,#0d7fa0 100%);color:var(--white);display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;flex-shrink:0}.student-card__info{flex:1;min-width:0}.student-card__name{font-size:1.1rem;font-weight:600;color:var(--black);margin-bottom:var(--spacing-xs)}.student-card__email{font-size:.9rem;color:var(--gray-medium);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.empty-state{text-align:center;padding:var(--spacing-xxl);background:var(--beige-light);border-radius:var(--radius-lg)}.empty-state__icon{font-size:4rem;margin-bottom:var(--spacing-md);opacity:.5}.empty-state__text{font-size:1.1rem;color:var(--gray-medium);font-style:italic}.enrollments-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;padding:1rem 0}.enrollment-card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 4px 15px #0000000d;border-left:5px solid #ccc;transition:transform .2s}.enrollment-card:hover{transform:translateY(-5px)}.enrollment-card.paid{border-left-color:#2ecc71}.enrollment-card.pending{border-left-color:#f1c40f}.btn-access{background:#2c3e50;color:#fff;width:100%;padding:.8rem;border-radius:8px;font-weight:600;cursor:pointer;border:none;margin-top:1rem}.badge{display:inline-block;padding:.3rem .6rem;border-radius:20px;font-size:.85rem;font-weight:500}.warning{background:#fff3cd;color:#856404}.success{background:#d4edda;color:#155724}.classroom{display:flex;flex-direction:column;justify-content:center;align-items:center;height:auto;margin-top:var(--spacing-xl);background:linear-gradient(135deg,#f0f4f8,#d9e4ec);margin:50px auto;padding:var(--spacing-xl)}.materials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}.material-card{background:#f8f9fa;border:1px solid #e9ecef;border-radius:10px;padding:1rem;text-align:center;display:flex;flex-direction:column;justify-content:space-between}.material-item{display:"flex";justify-content:"space-between";padding:"10px";border-bottom:"1px solid #eee"}.file-info .icon{font-size:3rem;display:block;margin-bottom:.5rem}.download-btn{display:block;text-decoration:none;background:#007bff;color:#fff;padding:.5rem;border-radius:5px;font-size:.9rem;margin-top:auto}.btn-back{background:none;border:1px solid #ddd;padding:.5rem 1rem;border-radius:5px;margin-bottom:2rem;cursor:pointer}.no-content{text-align:center;padding:2rem;color:#888;font-style:italic}.file-preview-overlay{position:fixed;inset:0;background:#000000eb;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);z-index:10000;display:flex;flex-direction:column;align-items:center;justify-content:center}.file-preview-header{width:100%;padding:15px 30px;background:#1a1a1a;color:#fff;display:flex;justify-content:space-between;align-items:center}.file-preview-content{width:90%;height:85%;margin-top:20px;background:#333;overflow:auto;display:flex;justify-content:center;border-radius:8px;box-shadow:0 0 30px #00000080}.preview-controls button{background:#444;color:#fff;border:none;padding:5px 15px;margin:0 5px;border-radius:4px;cursor:pointer}.zoom-wrapper{flex:1;width:100%;overflow:auto;display:flex;justify-content:center;align-items:flex-start;padding:40px}.pdf-frame{width:80%;height:90vh;background:#fff;border:none;box-shadow:0 0 50px #fff3;transition:transform .2s ease-out;transform-origin:top center}@media screen and (max-width:768px){:root{--fs-xl: 2.25rem;--fs-lg: 1.75rem;--fs-md: 1.35rem}.hero__container,.about__content{grid-template-columns:1fr;text-align:center}.contact__content{grid-template-columns:1fr}.footer__content{grid-template-columns:1fr;text-align:center}.teacher-panel__title{font-size:2rem}.teacher-courses-grid,.students-grid{grid-template-columns:1fr}.teacher-detail__title{font-size:2rem}.section-title{font-size:1.5rem}}@media screen and (max-width:480px){:root{--fs-xl: 1.85rem;--fs-lg: 1.5rem;--fs-md: 1.25rem}.hero__buttons{flex-direction:column;width:100%}.hero__buttons .button{width:100%}}