.courses-page {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(67, 97, 238, 0.03) 100%);
    min-height: 100vh;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.courses-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 150%;
    background: radial-gradient(circle at 50% 0%, rgba(67, 97, 238, 0.08), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.courses-page .container {
    position: relative;
    z-index: 1;
}

.courses-page .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.courses-page .section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.courses-page .section-description {
    font-size: 1.15rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.filter-container {
    margin-bottom: 50px;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-radius: 30px;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(67, 97, 238, 0.15);
    position: relative;
    overflow: hidden;
}

.filter-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--gradient-start), var(--accent), var(--gradient-end));
    background-size: 200% 100%;
    animation: gradientSlide 3s ease infinite;
}

@keyframes gradientSlide {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.filter-wrapper {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.filter-section-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-section-title i {
    color: var(--primary);
    font-size: 1rem;
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 1;
}

.search-box input {
    width: 100%;
    padding: 16px 24px 16px 55px;
    border-radius: 50px;
    border: 2px solid rgba(67, 97, 238, 0.2);
    background: white;
    font-size: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--dark);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.search-box input::placeholder {
    color: var(--gray);
    font-weight: 500;
}

.search-box input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.15), 0 8px 25px rgba(67, 97, 238, 0.1);
    background: white;
    transform: translateY(-2px);
}

.search-box input:focus + i {
    color: var(--accent);
    transform: translateY(-50%) scale(1.1);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.filter-tag {
    padding: 12px 24px;
    border-radius: 50px;
    background: white;
    color: var(--dark);
    border: 2px solid rgba(67, 97, 238, 0.2);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.filter-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.filter-tag span {
    position: relative;
    z-index: 1;
}

.filter-tag:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.2);
    border-color: var(--primary);
}

.filter-tag:hover::before {
    opacity: 0.1;
}

.filter-tag.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border-color: transparent;
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.35);
    transform: translateY(-2px);
}

.filter-tag.active::before {
    opacity: 1;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}

.course-grid-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 50px;
    color: var(--gray);
    font-size: 1.2rem;
    font-weight: 500;
}

.dark-mode .tag {
    background: rgba(72, 149, 239, 0.15);
    color: #7dd3fc;
    border: 1px solid rgba(72, 149, 239, 0.25);
}

.dark-mode .search-box input {
    border-color: #444;
    background: #222;
    color: #eee;
}

.dark-mode .filter-tag:not(.active) {
    background: rgba(26, 35, 50, 0.7);
    color: var(--text-primary);
    border-color: rgba(72, 149, 239, 0.25);
}

.courses-page .courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
    max-width: 1300px;
    margin: 0 auto;
}

.courses-page .course-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(67, 97, 238, 0.12);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    flex-direction: column;
}

.courses-page .course-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: -1;
}

.courses-page .course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(67, 97, 238, 0.2);
    border-color: rgba(67, 97, 238, 0.25);
}

.courses-page .course-card:hover .course-card-glow {
    opacity: 1;
}

.courses-page .course-card .course-card-glow {
    background: radial-gradient(circle at 50% 0%, rgba(67, 97, 238, 0.25), transparent 70%);
}

.courses-page .course-icon-wrapper {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(76, 201, 240, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2.2rem;
    color: var(--primary);
    transition: all 0.4s ease;
    border: 2px solid rgba(67, 97, 238, 0.15);
}

.courses-page .course-card:hover .course-icon-wrapper {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
    border-color: transparent;
}

.courses-page .course-icon {
    position: relative;
    z-index: 1;
}

.courses-page .course-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--accent) 50%, var(--gradient-end) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
}

.courses-page .course-description {
    color: var(--gray);
    margin-bottom: 25px;
    line-height: 1.8;
    font-size: 1.05rem;
}

.courses-page .course-tags {
    list-style: none;
    margin-bottom: 30px;
    flex-grow: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
    align-content: flex-start;
}

.courses-page .course-button {
    width: 100%;
    text-align: center;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: auto;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    background-size: 200% 200%;
    animation: gradientPulse 3s ease infinite;
}

.courses-page .course-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.5);
    animation: gradientPulse 1.5s ease infinite;
}

.courses-page .course-button i {
    transition: transform 0.4s ease;
}

.courses-page .course-button:hover i {
    transform: translateX(5px);
}

.dark-mode .courses-page {
    background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(72, 149, 239, 0.05) 100%);
}

.dark-mode .courses-page::before {
    background: radial-gradient(circle at 50% 0%, rgba(72, 149, 239, 0.12), transparent 50%);
}

.dark-mode .filter-container {
    background: rgba(26, 35, 50, 0.8);
    border-color: rgba(72, 149, 239, 0.2);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.dark-mode .filter-container::before {
    background: linear-gradient(90deg, #4895ef, #5aa3f0, #4cc9f0);
}

.dark-mode .filter-section-title {
    color: var(--text-secondary);
}

.dark-mode .filter-section-title i {
    color: #4895ef;
}

.dark-mode .search-box input {
    background: rgba(26, 35, 50, 0.7);
    border-color: rgba(72, 149, 239, 0.25);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.dark-mode .search-box input::placeholder {
    color: var(--text-secondary);
}

.dark-mode .search-box input:focus {
    border-color: #4895ef;
    box-shadow: 0 0 0 4px rgba(72, 149, 239, 0.2), 0 8px 25px rgba(72, 149, 239, 0.15);
    background: rgba(26, 35, 50, 0.9);
}

.dark-mode .search-box i {
    color: #4895ef;
}

.dark-mode .search-box input:focus + i {
    color: #4cc9f0;
}

.dark-mode .filter-tag {
    background: rgba(26, 35, 50, 0.7);
    border-color: rgba(72, 149, 239, 0.25);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dark-mode .filter-tag::before {
    background: linear-gradient(135deg, #4895ef, #4cc9f0);
}

.dark-mode .filter-tag:hover {
    box-shadow: 0 8px 25px rgba(72, 149, 239, 0.3);
    border-color: #4895ef;
    background: rgba(26, 35, 50, 0.9);
    color: var(--text-primary);
}

.dark-mode .filter-tag.active {
    background: linear-gradient(135deg, #4895ef, #4cc9f0);
    box-shadow: 0 8px 25px rgba(72, 149, 239, 0.4);
}

.dark-mode .courses-page .course-card {
    background: rgba(26, 35, 50, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-color: rgba(72, 149, 239, 0.15);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.dark-mode .courses-page .course-card:hover {
    box-shadow: 0 20px 50px rgba(72, 149, 239, 0.25);
    border-color: rgba(72, 149, 239, 0.3);
}

.dark-mode .courses-page .course-card-glow {
    background: radial-gradient(circle at 50% 0%, rgba(72, 149, 239, 0.3), transparent 70%);
}

.dark-mode .courses-page .course-icon-wrapper {
    background: linear-gradient(135deg, rgba(72, 149, 239, 0.1), rgba(79, 172, 254, 0.1));
    border-color: rgba(72, 149, 239, 0.15);
    color: #4895ef;
}

.dark-mode .courses-page .course-card:hover .course-icon-wrapper {
    background: linear-gradient(135deg, #4895ef, #4cc9f0);
    box-shadow: 0 8px 20px rgba(72, 149, 239, 0.3);
}

.dark-mode .courses-page .course-title {
    color: var(--text-primary);
}

.dark-mode .courses-page .course-description {
    color: var(--text-secondary);
}

.course-lessons {
    padding: 80px 0;
}

/* Responsive */
@media (max-width: 1200px) {
    .courses-page .courses-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
        max-width: 900px;
    }
}

@media (max-width: 992px) {
    .filter-container {
        padding: 35px 30px;
    }

    .filter-wrapper {
        gap: 25px;
    }

    .filter-tags {
        justify-content: center;
    }

    .courses-page .courses-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
}

@media (max-width: 768px) {
    .courses-page {
        padding: 100px 0 60px;
    }

    .filter-container {
        padding: 30px 25px;
        border-radius: 25px;
        margin-bottom: 40px;
    }

    .filter-wrapper {
        gap: 20px;
    }

    .filter-section-title {
        font-size: 0.8rem;
        margin-bottom: 12px;
    }

    .search-box input {
        padding: 14px 20px 14px 50px;
        font-size: 0.95rem;
    }

    .search-box i {
        left: 18px;
        font-size: 1.1rem;
    }

    .filter-tag {
        padding: 10px 18px;
        font-size: 0.9rem;
    }

    .courses-page .courses-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        max-width: 500px;
    }

    .courses-page .course-card {
        padding: 35px 25px;
    }

    .courses-page .course-icon-wrapper {
        width: 90px;
        height: 90px;
        font-size: 2rem;
        margin-bottom: 20px;
    }

    .courses-page .course-title {
        font-size: 1.5rem;
    }

    .courses-page .course-description {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .courses-page {
        padding: 90px 0 50px;
    }

    .filter-container {
        padding: 25px 20px;
        border-radius: 20px;
        margin-bottom: 35px;
    }

    .filter-container::before {
        height: 3px;
    }

    .filter-wrapper {
        gap: 18px;
    }

    .filter-section-title {
        font-size: 0.75rem;
        margin-bottom: 10px;
    }

    .filter-section-title i {
        font-size: 0.9rem;
    }

    .search-box input {
        padding: 12px 18px 12px 45px;
        font-size: 0.9rem;
    }

    .search-box i {
        left: 16px;
        font-size: 1rem;
    }

    .filter-tags {
        gap: 8px;
    }

    .filter-tag {
        padding: 8px 14px;
        font-size: 0.85rem;
    }

    .courses-page .course-card {
        padding: 30px 20px;
    }

    .courses-page .course-icon-wrapper {
        width: 80px;
        height: 80px;
        font-size: 1.8rem;
        margin-bottom: 18px;
    }

    .courses-page .course-title {
        font-size: 1.35rem;
    }

    .courses-page .course-description {
        font-size: 0.9rem;
    }
}