* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #5c6fa7;
}

/* HEADER */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0f172a;
    color: #fff;
    padding: 20px 40px;

}

.logo {
    font-weight: bold;
}

.nav a {
    margin: 0 15px;
    color: #cbd5f5;
    text-decoration: none;
}

.nav a.active {
    color: #fff;
}

.auth {
    color: #fff;
    text-decoration: none;
}

/* CONTAINER */
.container {
    padding: 40px;
}

/* FILTERS */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.filters input,
.filters select {
    padding: 10px 15px;
    border-radius: 20px;
    border: none;
    outline: none;
}

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

/* CARD */
.card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-img {
    width: 100%;
}

.card-content {
    padding: 15px;
}

.author {
    display: flex;
    gap: 10px;
    align-items: center;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.name {
    font-size: 14px;
}

.desc {
    font-size: 12px;
    color: gray;
}

.title {
    margin: 10px 0;
    font-weight: bold;
}

.price {
    font-size: 14px;
}

.sale {
    font-size: 12px;
    color: gray;
}

.tags {
    display: flex;
    gap: 10px;
    margin: 10px 0;
}

.tags span {
    background: #4ade80;
    padding: 5px 10px;
    border-radius: 10px;
    font-size: 12px;
}

/* BUTTONS */
.actions {
    display: flex;
    justify-content: space-between;
}

.btn {
    border: none;
    padding: 7px 12px;
    border-radius: 10px;
    cursor: pointer;
}

.primary {
    background: #3b82f6;
    color: #fff;
}

.secondary {
    background: #6366f1;
    color: #fff;
}

/* ADAPTIVE */
@media (max-width: 1200px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .filters {
        flex-direction: column;
    }
}

/* TEACHERS */
.teachers {
    margin-top: 100px;
    background: #ffffff;
    border-radius: 30px;
    padding: 60px;
}

.teachers-title {
    font-size: 36px;
    margin-bottom: 50px;
    color: #111827;
}

.teachers-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.teacher-card {
    display: flex;
    flex-direction: column;
}

.teacher-img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    object-position: center;
    border-radius: 20px;
    display: block;
    margin-bottom: 15px;
    transition: 0.3s ease;
}

.teacher-card:hover .teacher-img {
    transform: scale(1.03);
}

.teacher-card h3 {
    font-size: 18px;
    color: #111827;
    margin-bottom: 10px;
    line-height: 1.3;
}

.teacher-card p {
    font-size: 13px;
    color: #6b7280;
    line-height: 1.6;
}

/* ADAPTIVE */
@media (max-width: 1200px) {
    .teachers-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .teachers {
        padding: 40px;
    }

    .teachers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .teachers {
        padding: 30px 20px;
    }

    .teachers-grid {
        grid-template-columns: 1fr;
    }

    .teacher-img {
        height: 300px;
    }
}

.footer {
    background: #0f172a;
    color: #fff;
    width: 100%;
    margin-top: 80px;
    padding: 60px 80px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;

    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 60px;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: #cbd5f5;
    text-decoration: none;
    transition: 0.3s;
}

.footer-column a:hover {
    color: #fff;
}

.footer-phone {
    font-size: 24px;
    font-weight: bold;
}

.footer-title {
    margin-top: 20px;
    font-weight: bold;
    color: #fff;
}

.footer-socials {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ADAPTIVE */
@media (max-width: 900px) {
    .footer {
        padding: 50px 30px;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}