:root {
    --black: #000000;
    --white: #ffffff;
    --gray: #808080;
    --light-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --text-color: #333333;
    --text-color-after: #ff9100;
    
  
    --header-height: 60px;
    
   
    --container-padding: 1.0rem;
    --container-max-width: 30000px;
    
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    
    
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body.home-page main {
    margin-top: 0 !important;
    padding-top: 0 !important;
}


body.home-page .container-wrapper {
    margin-top: 0 !important;
    padding-top: 0 !important;
}


body.home-page .header {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
}


body.home-page .nav__link {
    color: var(--white) !important;
}

body.home-page .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.home-page .logo-svg {
    filter: brightness(0) invert(1); 
}


body.home-page .header.scrolled {
    background: var(--white) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-light) !important;
}


body.home-page .header.scrolled .nav__link {
    color: var(--text-color) !important;
}

body.home-page .header.scrolled .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.home-page .header.scrolled .logo-svg {
    filter: none !important;
}


body.home-page .header.scrolled .menu-toggle__line {
    background: var(--black) !important;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body.no-scroll {
    overflow: hidden;
}


.container-wrapper {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    z-index: 1000;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    position: relative;
    padding: 0 2rem;
}


.header__logo {
    position: static;
    transform: none;
    left: auto;
    text-decoration: none;
    color: var(--black);
    opacity: 0.8;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: opacity var(--transition-fast);
    height: 100%;
    justify-content: center;
    margin: 0 3rem;
    flex-shrink: 0;
}

.header__logo:hover {
    opacity: 1;
}

.logo-svg {
    height: 35px;
    width: auto;
    max-height: 100%;
    display: block;
    transition: all var(--transition-fast);
}


.header__nav--left {
    display: flex;
    justify-content: flex-end;
    flex: 1;
}


.header__nav--right {
    display: flex;
    justify-content: flex-start;
    flex: 1;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
    height: 100%;
    align-items: center;
}


.nav__link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    transition: all var(--transition-fast);
    padding: 0.3rem 0.75rem;
    white-space: nowrap;
    display: flex;
    align-items: center;
    height: 100%;
    border-radius: 2px;
}

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


.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 18px;
    height: 18px;
    position: relative;
    padding: 0;
    z-index: 1001;
}

.menu-toggle__line {
    display: block;
    width: 100%;
    height: 1px;
    background: var(--black);
    position: absolute;
    left: 0;
    transition: var(--transition-medium);
}

.menu-toggle__line:first-child {
    top: 5px;
}

.menu-toggle__line:last-child {
    bottom: 5px;
}

.menu-toggle.active .menu-toggle__line:first-child {
    transform: rotate(45deg);
    top: 8px;
}

.menu-toggle.active .menu-toggle__line:last-child {
    transform: rotate(-45deg);
    bottom: 8px;
}


.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--white);
    z-index: 999;
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    overflow-y: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav__inner {
    padding: 3rem var(--container-padding) 2rem;
    width: 100%;
    max-width: 500px;
}

.mobile-nav__list {
    list-style: none;
}

.mobile-nav__list li {
    margin-bottom: 0.75rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-medium), 
                transform var(--transition-medium);
}

.mobile-nav.active .mobile-nav__list li {
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav__list li:nth-child(1) { transition-delay: 0.1s; }
.mobile-nav__list li:nth-child(2) { transition-delay: 0.15s; }
.mobile-nav__list li:nth-child(3) { transition-delay: 0.2s; }
.mobile-nav__list li:nth-child(4) { transition-delay: 0.25s; }
.mobile-nav__list li:nth-child(5) { transition-delay: 0.3s; }
.mobile-nav__list li:nth-child(6) { transition-delay: 0.35s; }
.mobile-nav__list li:nth-child(7) { transition-delay: 0.4s; }

.mobile-nav__list a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 300;
    display: block;
    padding: 0.4rem 0;
    transition: color var(--transition-fast);
    text-align: center;
}

.mobile-nav__list a:hover {
    color: var(--black);
}


main {
    flex: 1;
    margin-top: var(--header-height);
    padding: 1.5rem 0;
}

footer {
    background: var(--white) !important;
    color: var(--text-color) !important;
    padding: 2.5rem 0 1.5rem !important;
    border-top: 1px solid var(--border-color) !important;
    margin-top: auto; 
}


footer .container-wrapper {
    padding: 0 var(--container-padding);
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-section {
    padding: 0 0.75rem;
}

.footer-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    color: var(--black);
    opacity: 0.9;
}

.footer-section p {
    color: var(--gray);
    line-height: 1.6;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
    padding-left: 0; 
}

.footer-section li {
    margin-bottom: 0.5rem;
    color: var(--gray);
    font-size: 0.85rem;
}

.footer-section a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--text-color-after);
}

.copyright {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--gray);
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}


@media (max-width: 768px) {
    footer {
        padding: 2rem 0 1.25rem !important;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-section {
        padding: 0 0.5rem;
    }
    
    .footer-section h3 {
        margin-bottom: 0.75rem;
    }
}

@media (max-width: 480px) {
    footer {
        padding: 1.5rem 0 1rem !important;
    }
    
    footer .container-wrapper {
        padding: 0 var(--container-padding);
    }
}


@media (max-width: 992px) {
    :root {
        --container-padding: 1.25rem;
    }
    
    .nav__list {
        gap: 0.75rem;
    }
    
    .nav__link {
        font-size: 0.9rem;
    }
    
    .logo__text {
        font-size: 2.5rem;
        font-weight: 300;
        letter-spacing: 3px;
        text-transform: uppercase;
    }
    
    .logo__subtitle {
        font-size: 0.85rem;
        font-weight: 400;
        letter-spacing: 4px;
        margin-top: -2px;
        opacity: 0.8;
    }
}

.nav__item--cart {
    margin-left: 10px;
}

.cart-link {
    display: flex;
    align-items: center;
    position: relative;
    padding: 5px;
}

.cart-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.2s ease;
}

.cart-link:hover .cart-icon {
    transform: scale(1.1);
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: #000;
    color: #fff;
    font-size: 12px;
    font-weight: bold;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
@media (max-width: 768px) {
    .nav__item--cart {
        margin-left: 0;
    }
    
    .cart-link {
        padding: 8px;
    }
}


.mobile-nav__list li a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    text-decoration: none;
    color: #333;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

.mobile-nav__list li a:hover {
    background-color: #f5f5f5;
}


@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }
    
    .header__inner {
        height: var(--header-height);
    }
    
    main {
        margin-top: var(--header-height);
        padding: 1.25rem 0;
    }
    
    .header__nav {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    
    .header__logo {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }

    .logo-svg {
        height: 35px;
    }
    
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .mobile-nav__list a {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 0.75rem;
    }
    
    .header__inner {
        height: var(--header-height);
    }
    
    main {
        margin-top: var(--header-height);
        padding: 1rem 0;
    }
    
    .logo-svg {
        height: 30px;
    }
    
    .mobile-nav__list a {
        font-size: 0.8rem;
    }
}

@media (max-width: 360px) {
    :root {
        --container-padding: 0.5rem;
    }
    
    .logo__text {
        font-size: 0.65rem;
    }
    
    .logo__subtitle {
        font-size: 0.2rem;
        letter-spacing: 0.5px;
    }
}



body.lecture-catalog-page main {
    margin-top: 0 ;
    padding-top: 0 ;
}

body.lecture-catalog-page .container-wrapper {
    margin-top: 0 !important;
    padding-top: 0 !important;
}


body.lecture-catalog-page .header {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
}

body.lecture-catalog-page .nav__link {
    color: var(--white) !important;
}

body.lecture-catalog-page .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.lecture-catalog-page .logo-svg {
    filter: brightness(0) invert(1);
}

body.lecture-catalog-page .menu-toggle__line {
    background: var(--white) !important;
}


body.lecture-catalog-page .header.scrolled {
    background: var(--white) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-light) !important;
}

body.lecture-catalog-page .header.scrolled .nav__link {
    color: var(--text-color) !important;
}

body.lecture-catalog-page .header.scrolled .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.lecture-catalog-page .header.scrolled .logo-svg {
    filter: none !important;
}

body.lecture-catalog-page .header.scrolled .menu-toggle__line {
    background: var(--black) !important;
}



body.catalog-page.transparent-header .header {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
}


body.catalog-page.transparent-header .nav__link {
    color: var(--white) !important;
}


body.catalog-page.transparent-header .nav__link:hover {
    color: var(--text-color-after) !important;
}


body.catalog-page.transparent-header .menu-toggle__line {
    background: var(--white) !important;
}

body.catalog-page.transparent-header .logo-svg {
    filter: brightness(0) invert(1);
}


body.catalog-page.transparent-header .header.scrolled {
    background: var(--white) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-light) !important;
}


body.catalog-page.transparent-header .header.scrolled .nav__link {
    color: var(--text-color) !important;
}


body.catalog-page.transparent-header .header.scrolled .nav__link:hover {
    color: var(--text-color-after) !important;
}


body.catalog-page.transparent-header .header.scrolled .menu-toggle__line {
    background: var(--black) !important;
}


body.catalog-page.transparent-header .header.scrolled .logo-svg {
    filter: none !important;
}



body.events-landing-page main {
    margin-top: 0 !important;
    padding-top: 0 !important;
}

body.events-landing-page .container-wrapper {
    margin-top: 0 !important;
    padding-top: 0 !important;
}


body.events-landing-page .header {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

body.events-landing-page .nav__link {
    color: var(--white) !important;
}

body.events-landing-page .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.events-landing-page .logo-svg {
    filter: brightness(0) invert(1);
}

body.events-landing-page .menu-toggle__line {
    background: var(--white) !important;
}


body.events-landing-page .header.scrolled {
    background: var(--white) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-light) !important;
}

body.events-landing-page .header.scrolled .nav__link {
    color: var(--text-color) !important;
}

body.events-landing-page .header.scrolled .nav__link:hover {
    color: var(--text-color-after) !important;
}

body.events-landing-page .header.scrolled .logo-svg {
    filter: none !important;
}

body.events-landing-page .header.scrolled .menu-toggle__line {
    background: var(--black) !important;
}


@media (max-width: 768px) {
 
    body.catalog-page.transparent-header .header,
    body.lecture-catalog-page .header,
    body.events-landing-page .header,
    body.home-page .header,
    .header {
        background: var(--white) !important;
        border-bottom: 1px solid var(--border-color) !important;
        box-shadow: var(--shadow-light) !important;
    }
    
    body.catalog-page.transparent-header .nav__link,
    body.lecture-catalog-page .nav__link,
    body.events-landing-page .nav__link,
    body.home-page .nav__link,
    .nav__link {
        color: var(--text-color) !important;
    }
    
    body.catalog-page.transparent-header .logo-svg,
    body.lecture-catalog-page .logo-svg,
    body.events-landing-page .logo-svg,
    body.home-page .logo-svg,
    .logo-svg {
        filter: none !important;
    }
    
    body.catalog-page.transparent-header .menu-toggle__line,
    body.lecture-catalog-page .menu-toggle__line,
    body.events-landing-page .menu-toggle__line,
    body.home-page .menu-toggle__line,
    .menu-toggle__line {
        background: var(--black) !important;
    }
    
    body.catalog-page.transparent-header .header.scrolled,
    body.lecture-catalog-page .header.scrolled,
    body.events-landing-page .header.scrolled,
    body.home-page .header.scrolled,
    .header.scrolled {
        background: var(--white) !important;
        border-bottom: 1px solid var(--border-color) !important;
        box-shadow: var(--shadow-light) !important;
    }
    
  
}

.header__actions {
    display: none;
}


@media (max-width: 768px) {
    
    .header__nav--right {
        display: none !important;
    }

    
    .header__actions {
        display: flex;
        align-items: center;
        gap: 1rem;
        position: absolute;
        right: 1rem;         
        top: 50%;
        transform: translateY(-50%);
        height: 100%;
        z-index: 1001;
    }

    .header__actions .cart-link {
        display: flex;
        align-items: center;
        position: relative;
        color: var(--text-color);
        text-decoration: none;
    }

    .header__actions .cart-count {
        position: absolute;
        top: -5px;
        right: -8px;
        background-color: #000;
        color: #fff;
        font-size: 11px;
        font-weight: bold;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        line-height: 1;
    }


    .header__actions .menu-toggle {
        display: block;
        width: 18px;
        height: 18px;
       
    }

 
    .header__actions .menu-toggle__line {
        background: var(--black);
    }

   
    .header__logo {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        margin: 0;
    }
}