:root {
    --bg-color: #f7fafc;
    --card-bg: #ffffff;
    --card-accent-bg: #e6f7ff;
    --text-main: #1a202c;
    --text-muted: #4a5568;
    --primary: #45adbf;
    --primary-hover: #399aa8;
    /* Slightly darker shade for hover */
    --accent: #8b5cf6;
    --gradient: linear-gradient(135deg, #45adbf 0%, #2b8a9e 100%);
    --border: #e2e8f0;
    --container-width: 1200px;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

ul {
    list-style: none;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

.btn--primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn--primary:hover {
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
    transform: translateY(-2px);
}

.btn--outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn--outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn--lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn--full {
    width: 100%;
    text-align: center;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    backdrop-filter: none;
    border-bottom: none;
    padding: 30px 0;
    box-shadow: none;
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo__sub {
    color: var(--primary);
}

.nav__list {
    display: flex;
    gap: 32px;
}

.nav__link {
    color: #4a5568;
    font-weight: 500;
}

.nav__link:hover {
    color: var(--primary);
}

.burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero__content {
    flex: 1;
    z-index: 2;
}

.hero__badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-main);
}

.text-gradient {
    background: var(--gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: 16px;
}

.hero__visual {
    position: relative;
    width: 500px;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__image {
    width: 100%;
    height: auto;
    max-width: 500px;
    object-fit: contain;
}

/* Sections General */
.section {
    padding: 100px 0;
}

.section__title {
    font-size: 2.5rem;
    margin-bottom: 60px;
    text-align: center;
    font-weight: 700;
}

.grid {
    display: grid;
    gap: 32px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: 0.3s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.3);
}

/* Audience */
/* Audience */
.audience__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.audience__card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 40px;
    border: none;
    border-radius: 32px;
    overflow: hidden;
    position: relative;
    min-height: 300px;
}

.audience__card--1 {
    background-color: #e6f7ff;
    /* Light Blue */
}

.audience__card--2 {
    background-color: #fff5eb;
    /* Light Peach */
}

.audience__card--3 {
    background-color: #f0fff4;
    /* Light Green */
}

.card__content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card__icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 8px;
}

.card__image {
    width: 180px;
    height: auto;
    object-fit: contain;
    z-index: 1;
}

.card__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

.card__text {
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Features Grid Section */
.features {
    padding: 80px 0;
    background: var(--bg-color);
}

.features__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-block {
    background: var(--card-bg);
    display: flex;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: 0.3s;
    overflow: hidden;
    height: 100%;
    /* Ensure block fills grid cell height */
}

.feature-block:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Large blocks with background images */
/* Large blocks with background images */
.feature-block--large {
    padding: 0;
    /* min-height removed to allow horizontal rectangle shape */
    border-radius: 24px;
    /* Slightly rounded corners */
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Small blocks with text - Rounded Rectangle */
.feature-block--small {
    padding: 32px;
    justify-content: flex-start;
    align-items: flex-start;
    /* Align top */
    flex-direction: row;
    /* Icon left, text right */
    gap: 20px;
    border-radius: 24px;
    /* Standard rounded corners */
}

.feature-block__info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-bl.program__header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.program__date {
    margin-left: auto;
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.feature-block__header {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.feature-block--1 {
    background-image: url('https://api.university.skillslab.center/media/lesson_pictures/image_qwidJxI.png');
    background-color: transparent;
    /* Remove bg color */
}

.feature-block--2 {
    background-color: #fff5eb;
}

.feature-block--3 {
    background-color: #f0fff4;
}

.feature-block--4 {
    background-image: url('feature-2.jpg');
    background-color: transparent;
    /* Remove bg color */
}

.feature-block__icon {
    background: transparent;
    font-size: 20px;
    /* Smaller icon */
    color: var(--primary);
    line-height: 1.2;
    /* Align with title line height */
}

.feature-block__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    line-height: 1.2;
}

.feature-block__text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin: 0;
}

.features__content {
    padding: 0 20px;
}

.features__label {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.features__title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 24px;
    line-height: 1.2;
}

.features__description {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 1.125rem;
    margin-bottom: 24px;
}

.features__cta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.features__note {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
    margin: 0;
    opacity: 0.8;
}


/* Instructors */
.instructors__grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.instructor__image-wrapper {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 24px;
    background: var(--border);
}

.instructor__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.instructor__image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-main);
    background: var(--card-accent-bg);
}

.instructor__role {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 16px;
}

.instructor__list {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.instructor__list li {
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.instructor__list li::before {
    content: "•";
    color: var(--primary);
    position: absolute;
    left: 0;
}

/* Instructor channel styles */
.instructor__channel {
    display: block;
    margin-top: 20px;
    padding: 12px 16px;
    background: var(--card-accent-bg);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid var(--primary);
}

.instructor__channel:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: translateX(2px);
}

.instructor__channel-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.instructor__channel-name {
    display: block;
    font-size: 0.95rem;
    color: var(--primary);
    font-weight: 600;
}

/* Methodology */
.methodology {
    background: var(--card-accent-bg);
}

.methodology__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.methodology__subtitle {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-main);
}

.methodology__item p {
    color: var(--text-muted);
}

/* Program */
.program {
    background: var(--section-bg);
}

.program__schedule {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-accent-bg);
    padding: 12px 20px;
    border-radius: 12px;
    margin: 0 auto 40px;
    color: var(--primary);
    font-weight: 600;
    font-size: 1rem;
    width: fit-content;
}

.program__schedule svg {
    flex-shrink: 0;
}

.program__list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.program__item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.program__header {
    display: flex;
    align-items: center;
    gap: 20px;
}

.program__number {
    font-size: 1.5rem;
    font-weight: 800;
    color: rgba(59, 130, 246, 0.2);
}

.program__topic {
    font-size: 1.1rem;
    font-weight: 600;
}

.program__desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    padding-left: 45px;
}

/* Pricing */
.pricing__grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 900px;
    margin: 0 auto;
}

.pricing__card {
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.pricing__card--popular {
    border-color: var(--primary);
    background: linear-gradient(to bottom, #ffffff, var(--card-accent-bg));
}

.pricing__badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing__plan {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.pricing__price {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.pricing__desc {
    color: var(--text-muted);
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.pricing__features {
    margin-bottom: 32px;
    flex-grow: 1;
}

.pricing__features li {
    margin-bottom: 16px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
}

.pricing__features li::before {
    content: "✓";
    color: var(--primary);
    font-weight: 800;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 80px 0 0;
    margin-top: 100px;
    background: #ffffff;
}

.footer__container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.logo__img {
    height: 40px;
    width: auto;
}

.footer__logo .logo__img {
    height: 50px;
}

.footer__logo {
    display: block;
    margin-bottom: 16px;
}

.footer__text {
    color: var(--text-muted);
    max-width: 300px;
}

.footer__title {
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.footer__link {
    display: block;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.footer__link:hover {
    color: var(--primary);
}

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

.social-link {
    color: var(--text-muted);
}

.social-link:hover {
    color: var(--text-main);
}

.footer__bottom {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header__btn {
        display: none;
    }

    .burger {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
    }

    .burger span {
        display: block;
        width: 100%;
        height: 2px;
        background: #1a202c;
        position: absolute;
        transition: 0.3s;
    }

    .burger span:nth-child(1) {
        top: 0;
    }

    .burger span:nth-child(2) {
        top: 50%;
        transform: translateY(-50%);
    }

    .burger span:nth-child(3) {
        bottom: 0;
    }

    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        transform: translateY(-150%);
        transition: 0.3s;
        border-bottom: 1px solid var(--border);
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav__list {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__container {
        flex-direction: column;
        text-align: center;
    }

    .hero__subtitle {
        margin: 0 auto 32px;
    }

    .hero__actions {
        justify-content: center;
        flex-direction: column;
    }

    .hero__visual {
        display: none;
    }

    .footer__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer__text {
        margin: 0 auto;
    }

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

    .features__grid {
        order: 2;
    }

    .features__content {
        order: 1;
        padding: 0;
    }

    .features__title {
        font-size: 2rem;
    }

    .feature-block__icon {
        display: none;
    }

    .audience__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 992px) {
    .audience__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }
}

@media (max-width: 576px) {
    .audience__grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* About Section */
.about {
    margin: 40px 0;
    /* Add some margin if it's a standalone block */
}

.about-card {
    padding: 60px;
    background: #080D15;
    /* Dark background from reference */
    color: #ffffff;
    border-radius: 24px;
    /* Rounded corners for the whole block if it's a card, or just section */
}

.about-card .section__title {
    display: none;
    /* Hide default title if not in reference, or style it white */
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    /* Separator line */
    padding-bottom: 60px;
}

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

.stat-item__value {
    font-size: 2rem;
    font-weight: 500;
    color: #ffffff;
    line-height: 1;
}

.stat-item__text {
    font-size: 0.9rem;
    color: #9CA3AF;
    /* Light gray text */
    line-height: 1.4;
}

.about__partners {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about__partners-label {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: max-content;
}

.about__partners-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about__partners-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: #ffffff;
    margin: 0;
}

.partners__grid {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: center;
}

.partner-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
    opacity: 1;
    transition: 0.3s;
    border-radius: 6px;
    /* Slight rounding if needed */
}

.partner-logo:hover {
    transform: scale(1.1);
}

.about__book {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 24px;
}

.about__book-cover {
    width: 100px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.about__book-content {
    flex: 1;
}

.about__book-text {
    color: #ffffff;
    font-size: 1.125rem;
    margin: 0 0 12px 0;
    font-weight: 500;
}

.about__book-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: opacity 0.3s;
}

.about__book-link:hover {
    opacity: 0.8;
}

@media (max-width: 992px) {
    .about__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 576px) {
    .about__stats {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .stat-item__value {
        font-size: 2.5rem;
    }

    .partners__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* Reviews */
.reviews {
    background: var(--bg-color);
}

.reviews__grid {
    column-count: 2;
    column-gap: 24px;
}

.review__card {
    break-inside: avoid;
    margin-bottom: 24px;
    padding: 32px;
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.review__header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}

.review__author {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
}

.review__role {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.review__text {
    color: var(--text-main);
    line-height: 1.6;
    font-size: 1rem;
}

.review__video-wrapper {
    margin: -32px -32px 24px -32px;
    height: 200px;
    background: #000;
    position: relative;
    border-radius: 24px 24px 0 0;
    overflow: hidden;
}

.review__video-wrapper iframe {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.review__avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--card-accent-bg);
}

@media (max-width: 768px) {
    .reviews__grid {
        column-count: 1;
    }

    .review__card {
        padding: 24px;
    }

    .review__video-wrapper {
        margin: -24px -24px 20px -24px;
    }
}

.reviews__more {
    margin-top: 40px;
    display: flex;
    justify-content: center;
}