:root {
    --conference-purple: #33258c;
    --conference-purple-dark: #251970;
    --conference-blue: #075ba9;
    --conference-cyan: #18a9c0;
    --conference-red: #ed0019;
    --conference-orange: #ff981b;
    --conference-green: #00a550;
    --conference-ink: #252631;
    --conference-muted: #686b78;
    --conference-surface: #f4f8fc;
    --conference-border: #dfe7f0;
    --conference-white: #fff;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 84px;
}

body {
    color: var(--conference-ink);
    background: var(--conference-white);
}

/* Header */

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid rgba(51, 37, 140, 0.09);
    box-shadow: 0 10px 35px rgba(24, 42, 80, 0.08);
    backdrop-filter: blur(16px);
}

    .site-header .navbar {
        min-height: 78px;
    }

.navbar-brand {
    transition: all 2s;
    
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--conference-purple);
}

    .navbar-brand:hover {
        color: var(--conference-purple);
    }

    .navbar-brand img {
        display: none;
        max-height: 40px;
    }

#header.header-scrolled .navbar-brand img {
    display: block;
}


    .site-header .nav-link {
        position: relative;
        padding: 12px 13px !important;
        color: #343544;
        font-size: 14px;
        font-weight: 650;
    }

        .site-header .nav-link::after {
            content: "";
            position: absolute;
            right: 13px;
            bottom: 5px;
            left: 13px;
            height: 2px;
            background: var(--conference-red);
            transform: scaleX(0);
            transition: transform 0.2s ease;
        }

        .site-header .nav-link:hover,
        .site-header .nav-link.active {
            color: var(--conference-purple);
        }

            .site-header .nav-link:hover::after,
            .site-header .nav-link.active::after {
                transform: scaleX(1);
            }

    .nav-register,
    .hero-button,
    .registration-submit {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 14px;
        border: 0;
        border-radius: 999px;
        background: var(--conference-red);
        color: #fff;
        font-weight: 750;
        text-decoration: none;
        box-shadow: 0 12px 28px rgba(237, 0, 25, 0.24);
        transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .nav-register {
        padding: 12px 22px;
        font-size: 14px;
    }

        .nav-register:hover,
        .hero-button:hover,
        .registration-submit:hover {
            color: #fff;
            background: #cc0016;
            transform: translateY(-2px);
            box-shadow: 0 16px 35px rgba(237, 0, 25, 0.3);
        }
    /* Hero */

    .conference-hero {
        position: relative;
        min-height: 100svh;
        padding: 125px 0 42px;
        overflow: hidden;
        background: linear-gradient( 90deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0) ), url("/images/ped26/main-bg.jpg") center bottom / cover no-repeat;
    }

    .hero-container {
        min-height: calc(100svh - 167px);
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .hero-content {
        width: min(100%, 1120px);
    }

    .hero-title {
        display: block;
        width: min(100%, 1080px);
        height: auto;
    }

    .hero-button {
        margin-top: 34px;
        padding: 16px 28px;
    }

        .hero-button span {
            font-size: 21px;
            line-height: 1;
        }

    .hero-organizers {
        width: min(520px, 100%);
        padding: 13px 18px;
        border: 1px solid rgba(255, 255, 255, 0.6);
        border-radius: 18px;
        background: rgba(255, 255, 255, 0.73);
        box-shadow: 0 16px 45px rgba(29, 58, 107, 0.12);
        backdrop-filter: blur(11px);
        margin-bottom: 30px;
    }

        .hero-organizers img {
            display: block;
            width: 100%;
            height: auto;
        }

    .organizers-caption {
        margin-bottom: 7px;
        color: var(--conference-muted);
        font-size: 10px;
        font-weight: 750;
        letter-spacing: 0.1em;
        text-transform: uppercase;
    }
    /* Registration */

    .registration-section {
        position: relative;
        padding: 110px 0;
        overflow: hidden;
        background: radial-gradient( circle at 90% 5%, rgba(24, 169, 192, 0.12), transparent 28% ), var(--conference-surface);
    }

        .registration-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 220px;
            height: 7px;
            border-radius: 0 0 20px;
            background: linear-gradient( 90deg, var(--conference-purple), var(--conference-blue), var(--conference-cyan) );
        }

    .section-heading {
        width: min(720px, 100%);
        margin: 0 auto 48px;
        text-align: center;
    }

    .section-label {
        color: var(--conference-red);
        font-size: 12px;
        font-weight: 800;
        letter-spacing: 0.14em;
        text-transform: uppercase;
    }

    .section-heading h2 {
        margin: 9px 0 12px;
        color: var(--conference-purple);
        font-size: clamp(36px, 5vw, 58px);
        font-weight: 850;
        letter-spacing: -0.04em;
    }

    .section-heading p {
        margin: 0;
        color: var(--conference-muted);
        font-size: 17px;
        line-height: 1.65;
    }

    .registration-layout {
        display: grid;
        grid-template-columns: minmax(270px, 0.7fr) minmax(0, 1.55fr);
        width: min(1120px, 100%);
        margin: 0 auto;
        overflow: hidden;
        border-radius: 28px;
        background: #fff;
        box-shadow: 0 28px 80px rgba(29, 47, 83, 0.13);
    }

    .registration-info {
        position: relative;
        padding: 50px 42px;
        overflow: hidden;
        color: #fff;
        background: radial-gradient( circle at 100% 0, rgba(38, 183, 203, 0.75), transparent 38% ), linear-gradient( 155deg, var(--conference-purple-dark), var(--conference-blue) );
    }

        .registration-info::after {
            content: "";
            position: absolute;
            right: -80px;
            bottom: -110px;
            width: 260px;
            height: 260px;
            border: 36px solid rgba(255, 255, 255, 0.07);
            border-radius: 50%;
        }

    .registration-info-label {
        display: block;
        margin-bottom: 20px;
        color: rgba(255, 255, 255, 0.68);
        font-size: 11px;
        font-weight: 750;
        letter-spacing: 0.14em;
        text-transform: uppercase;
    }

    .registration-date {
        display: flex;
        align-items: flex-end;
        gap: 11px;
    }

        .registration-date strong {
            color: #fff;
            font-size: 68px;
            font-weight: 850;
            line-height: 0.9;
            letter-spacing: -0.07em;
        }

        .registration-date span {
            max-width: 80px;
            font-size: 17px;
            font-weight: 700;
            line-height: 1.1;
        }

    .registration-city {
        margin-top: 13px;
        color: #5ee4f0;
        font-size: 32px;
        font-weight: 850;
        text-transform: uppercase;
    }

    .registration-divider {
        width: 52px;
        height: 4px;
        margin: 30px 0;
        border-radius: 20px;
        background: var(--conference-orange);
    }

    .registration-info p {
        position: relative;
        z-index: 1;
        color: rgba(255, 255, 255, 0.76);
        font-size: 14px;
        line-height: 1.7;
    }

    .registration-features {
        position: relative;
        z-index: 1;
        display: grid;
        gap: 12px;
        margin: 26px 0 0;
        padding: 0;
        list-style: none;
    }

        .registration-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 650;
        }

            .registration-features li::before {
                content: "✓";
                display: grid;
                flex: 0 0 25px;
                width: 25px;
                height: 25px;
                place-items: center;
                border-radius: 50%;
                background: rgba(255, 255, 255, 0.13);
                color: #70eff7;
            }

    .registration-form-wrapper {
        padding: 48px;
    }
    /* Form */

    .conference-form .row {
        --bs-gutter-x: 18px;
    }

    .conference-form .form-group {
        position: relative;
        margin-bottom: 18px;
    }

    .conference-form .floating-label {
        margin: 0 0 7px 2px;
        color: #4c4f5c;
        font-size: 13px;
        font-weight: 700;
    }

    .conference-form .form-control,
    .conference-form .form-select {
        min-height: 52px;
        border: 1px solid var(--conference-border);
        border-radius: 12px;
        background-color: #f9fbfd;
        color: var(--conference-ink);
        box-shadow: none;
        transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .conference-form textarea.form-control {
        min-height: 105px;
        resize: vertical;
    }

    .conference-form .form-control:focus,
    .conference-form .form-select:focus {
        border-color: var(--conference-cyan);
        background-color: #fff;
        box-shadow: 0 0 0 4px rgba(24, 169, 192, 0.12);
    }

    .conference-form .alert {
        border: 1px solid var(--conference-border);
        border-radius: 15px;
        background: #f8fafc;
        color: #565967;
    }

    .conference-form .alert-warning {
        border-color: rgba(255, 152, 27, 0.35);
        background: rgba(255, 152, 27, 0.08);
    }

    .conference-form .form-check-input {
        border-color: #b9c5d2;
    }

        .conference-form .form-check-input:checked {
            border-color: var(--conference-purple);
            background-color: var(--conference-purple);
        }

    .conference-form .text-danger {
        margin-top: 5px;
        font-size: 12px;
    }

    .registration-submit {
        min-width: 220px;
        padding: 16px 27px;
    }
    /* Responsive */

    @media (max-width: 991.98px) {
        .site-header .navbar-collapse {
            margin-top: 12px;
            padding: 14px;
            border-radius: 16px;
            background: #fff;
            box-shadow: 0 20px 50px rgba(29, 47, 83, 0.13);
        }

        .site-header .nav-link {
            padding: 11px 9px !important;
        }

        .nav-register {
            width: 100%;
            margin-top: 8px;
        }

        .registration-layout {
            grid-template-columns: 1fr;
        }

        .registration-info {
            padding: 36px;
        }

        .registration-date strong {
            font-size: 58px;
        }
    }

    .clock {
        padding-top: 40px;
        zoom: .7;
    }

    @media (max-width: 767.98px) {
        html {
            scroll-padding-top: 70px;
        }

        .site-header .navbar {
            min-height: 68px;
        }

        .navbar-brand img {
            max-height: 30px;
        }

        .conference-hero {
            min-height: auto;
            padding: 92px 0 32px;
            background-position: 66% bottom;
        }

        .hero-container {
            min-height: auto;
        }

        .hero-content {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .hero-title {
            width: min(88vw, 430px);
            max-height: 64svh;
            object-fit: contain;
        }

        .hero-button {
            margin-top: 24px;
            padding: 14px 23px;
        }

        .hero-organizers {
            margin-top: 30px;
            padding: 11px 13px;
        }

        .registration-section {
            padding: 75px 0;
        }

        .section-heading {
            margin-bottom: 30px;
        }

            .section-heading p {
                font-size: 15px;
            }

        .registration-layout {
            border-radius: 20px;
        }

        .registration-info,
        .registration-form-wrapper {
            padding: 28px 21px;
        }

        .conference-form .row {
            margin-bottom: 0 !important;
        }

        .conference-form .form-group {
            margin-bottom: 16px;
        }

        .registration-submit {
            width: 100%;
        }

        .clock {
            padding-top: 40px;
            zoom: .5;
        }
    }

/* Полноэкранный фон прелоадера */
#preloader.loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient( circle at center, #ffffff 0%, #f4faff 55%, #e4f3ff 100% );
    opacity: 1;
    visibility: visible;
    transition: opacity 0.45s ease, visibility 0.45s ease;
}

    /* Основное цветное кольцо */
    #preloader.loader::before {
        content: "";
        width: 82px;
        height: 82px;
        border: 9px solid transparent;
        border-top-color: #00a550;
        border-right-color: #ff981b;
        border-bottom-color: #075ba9;
        border-left-color: #ed0019;
        border-radius: 50%;
        filter: drop-shadow(0 10px 18px rgba(7, 91, 169, 0.18));
        animation: conference-loader-spin 1.05s cubic-bezier(0.55, 0.15, 0.45, 0.85) infinite;
    }

    /* Центральная синяя точка */
    #preloader.loader::after {
        content: "";
        position: absolute;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: #075ba9;
        box-shadow: 0 0 0 7px rgba(7, 91, 169, 0.1), 0 8px 20px rgba(7, 91, 169, 0.25);
        animation: conference-loader-pulse 1.05s ease-in-out infinite;
    }

    /* Класс добавляется после загрузки страницы */
    #preloader.loader.is-hidden {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }

@keyframes conference-loader-spin {
    0% {
        transform: rotate(0deg) scale(0.94);
    }

    50% {
        transform: rotate(180deg) scale(1);
    }

    100% {
        transform: rotate(360deg) scale(0.94);
    }
}

@keyframes conference-loader-pulse {
    0%, 100% {
        transform: scale(0.85);
        opacity: 0.65;
    }

    50% {
        transform: scale(1.15);
        opacity: 1;
    }
}

/* Уважение системной настройки уменьшения анимации */
@media (prefers-reduced-motion: reduce) {
    #preloader.loader::before {
        animation-duration: 2.5s;
    }

    #preloader.loader::after {
        animation: none;
    }
}

/* Sponsors */

.sponsors-section {
    position: relative;
    padding: 110px 0;
    overflow: hidden;
    background: radial-gradient( circle at 8% 18%, rgba(24, 169, 192, 0.09), transparent 28% ), radial-gradient( circle at 92% 85%, rgba(51, 37, 140, 0.08), transparent 30% ), #fff;
}

    .sponsors-section::before {
        content: "";
        position: absolute;
        top: 0;
        right: 0;
        width: 230px;
        height: 7px;
        border-radius: 0 0 0 20px;
        background: linear-gradient( 90deg, var(--conference-cyan), var(--conference-blue), var(--conference-purple) );
    }

/* Tier */

.sponsor-tier {
    position: relative;
    width: min(1120px, 100%);
    margin: 0 auto 42px;
    padding: 32px;
    border: 1px solid var(--conference-border);
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 18px 55px rgba(29, 47, 83, 0.08);
}

    .sponsor-tier:last-child {
        margin-bottom: 0;
    }

.sponsor-tier-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
}

    .sponsor-tier-heading h3 {
        margin: 0;
        color: var(--conference-purple);
        font-size: 22px;
        font-weight: 800;
    }

.sponsor-tier-icon {
    display: block;
    flex: 0 0 13px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(0, 0, 0, 0.04);
}

/* Platinum */

.sponsor-tier-platinum {
    border-color: rgba(105, 132, 153, 0.4);
    background: linear-gradient( 135deg, rgba(222, 234, 243, 0.9), rgba(255, 255, 255, 0.97) 48%, rgba(225, 237, 245, 0.78) );
    box-shadow: 0 23px 65px rgba(53, 75, 102, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

    .sponsor-tier-platinum .sponsor-tier-heading h3 {
        color: #426078;
    }

    .sponsor-tier-platinum .sponsor-tier-icon {
        background: linear-gradient( 135deg, #fff 0%, #c7d7e3 42%, #6f8da5 100% );
        box-shadow: 0 0 0 6px rgba(111, 141, 165, 0.12), inset 0 1px 1px rgba(255, 255, 255, 0.9);
    }

/* Gold */

.sponsor-tier-gold {
    border-color: rgba(218, 168, 38, 0.36);
    background: linear-gradient( 135deg, rgba(255, 249, 226, 0.78), rgba(255, 255, 255, 0.96) 48% );
}

    .sponsor-tier-gold .sponsor-tier-icon {
        background: linear-gradient(135deg, #ffe891, #d39b15);
        box-shadow: 0 0 0 6px rgba(218, 168, 38, 0.12);
    }

/* Silver */

.sponsor-tier-silver {
    border-color: rgba(153, 166, 182, 0.35);
    background: linear-gradient( 135deg, rgba(239, 244, 249, 0.76), rgba(255, 255, 255, 0.95) 48% );
}

    .sponsor-tier-silver .sponsor-tier-icon {
        background: linear-gradient(135deg, #e7edf3, #8e9aaa);
        box-shadow: 0 0 0 6px rgba(142, 154, 170, 0.12);
    }

/* Bronze */

.sponsor-tier-bronze {
    border-color: rgba(182, 115, 65, 0.28);
    background: linear-gradient( 135deg, rgba(250, 239, 230, 0.68), rgba(255, 255, 255, 0.95) 48% );
}

    .sponsor-tier-bronze .sponsor-tier-icon {
        background: linear-gradient(135deg, #e7b486, #a96032);
        box-shadow: 0 0 0 6px rgba(169, 96, 50, 0.11);
    }

.sponsor-tier-ordinary {
    border-color: rgba(132, 151, 169, 0.26);
    background: linear-gradient( 135deg, rgba(240, 245, 248, 0.7), rgba(255, 255, 255, 0.95) 48% );
}

    .sponsor-tier-ordinary .sponsor-tier-icon {
        background: linear-gradient(135deg, #c8d5df, #72899b);
        box-shadow: 0 0 0 6px rgba(114, 137, 155, 0.11);
    }

/* Grids */

.sponsors-grid {
    display: grid;
    align-items: stretch;
    justify-content: center;
    gap: 18px;
}

.sponsors-grid-platinum {
    grid-template-columns: minmax(300px, 520px);
}

.sponsors-grid-gold {
    grid-template-columns: repeat(2, minmax(260px, 390px));
}

.sponsors-grid-silver,
.sponsors-grid-bronze {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

/* Sponsor card */

.sponsor-card {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    height: 138px;
    padding: 24px;
    overflow: hidden;
    border: 1px solid rgba(218, 226, 236, 0.85);
    border-radius: 17px;
    background: #fff;
    box-shadow: 0 8px 25px rgba(29, 47, 83, 0.055);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

    .sponsor-card::before {
        content: "";
        position: absolute;
        inset: 0;
        pointer-events: none;
        background: linear-gradient( 135deg, rgba(255, 255, 255, 0.58), transparent 45% );
    }

    .sponsor-card:hover {
        z-index: 2;
        border-color: rgba(24, 169, 192, 0.45);
        transform: translateY(-5px);
        box-shadow: 0 17px 38px rgba(29, 47, 83, 0.13);
    }

    .sponsor-card img {
        position: relative;
        z-index: 1;
        display: block;
        width: 100%;
        max-width: 190px;
        height: 72px;
        object-fit: contain;
        filter: saturate(0.94);
        transition: filter 0.25s ease, transform 0.25s ease;
    }

    .sponsor-card:hover img {
        filter: saturate(1);
        transform: scale(1.035);
    }

/* Platinum card */

.sponsor-tier-platinum .sponsor-card {
    height: 205px;
    border-color: rgba(117, 144, 166, 0.25);
}

    .sponsor-tier-platinum .sponsor-card img {
        max-width: 340px;
        height: 125px;
    }

/* Gold cards */

.sponsor-tier-gold .sponsor-card {
    height: 170px;
}

    .sponsor-tier-gold .sponsor-card img {
        max-width: 250px;
        height: 96px;
    }

/* Bronze cards */

.sponsor-tier-bronze .sponsor-card {
    height: 125px;
}

    .sponsor-tier-bronze .sponsor-card img {
        max-width: 165px;
        height: 64px;
    }

/* Tablet */

@media (max-width: 991.98px) {
    .sponsors-grid-silver,
    .sponsors-grid-bronze {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* Mobile */

@media (max-width: 767.98px) {
    .sponsors-section {
        padding: 75px 0;
    }

    .sponsor-tier {
        margin-bottom: 25px;
        padding: 23px 17px;
        border-radius: 20px;
    }

    .sponsor-tier-heading {
        margin-bottom: 19px;
    }

        .sponsor-tier-heading h3 {
            font-size: 19px;
        }

    .sponsors-grid-platinum,
    .sponsors-grid-gold {
        grid-template-columns: 1fr;
    }

    .sponsors-grid-silver,
    .sponsors-grid-bronze {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 11px;
    }

    .sponsor-tier-platinum .sponsor-card {
        height: 155px;
    }

        .sponsor-tier-platinum .sponsor-card img {
            max-width: 270px;
            height: 100px;
        }

    .sponsor-tier-gold .sponsor-card {
        height: 135px;
    }

        .sponsor-tier-gold .sponsor-card img {
            max-width: 215px;
            height: 82px;
        }

    .sponsor-tier-silver .sponsor-card,
    .sponsor-tier-bronze .sponsor-card {
        height: 110px;
        padding: 15px 12px;
        border-radius: 13px;
    }

        .sponsor-tier-silver .sponsor-card img,
        .sponsor-tier-bronze .sponsor-card img {
            max-width: 145px;
            height: 64px;
        }

    /* Пятый логотип центрируется в отдельной строке */
    .sponsors-grid-silver .sponsor-card:last-child:nth-child(odd),
    .sponsors-grid-bronze .sponsor-card:last-child:nth-child(odd) {
        grid-column: 1 / -1;
        width: calc(50% - 6px);
        justify-self: center;
    }
}

@media (max-width: 380px) {
    .sponsors-grid-silver,
    .sponsors-grid-bronze {
        grid-template-columns: 1fr;
    }

        .sponsors-grid-silver .sponsor-card:last-child:nth-child(odd),
        .sponsors-grid-bronze .sponsor-card:last-child:nth-child(odd) {
            grid-column: auto;
            width: 100%;
        }
}

/* Tablet */

@media (max-width: 991.98px) {
    .sponsors-grid-gold {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sponsors-grid-silver,
    .sponsors-grid-bronze {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* Mobile */

@media (max-width: 767.98px) {
    .sponsors-section {
        padding: 75px 0;
    }

    .sponsor-tier {
        margin-bottom: 25px;
        padding: 23px 17px;
        border-radius: 20px;
    }

    .sponsor-tier-heading {
        margin-bottom: 19px;
    }

        .sponsor-tier-heading h3 {
            font-size: 19px;
        }

    .sponsors-grid,
    .sponsors-grid-gold,
    .sponsors-grid-silver,
    .sponsors-grid-bronze {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 11px;
    }

    .sponsor-card,
    .sponsor-tier-gold .sponsor-card,
    .sponsor-tier-bronze .sponsor-card {
        height: 112px;
        padding: 16px 12px;
        border-radius: 13px;
    }

        .sponsor-card img,
        .sponsor-tier-gold .sponsor-card img,
        .sponsor-tier-bronze .sponsor-card img {
            max-width: 150px;
            height: 65px;
        }

        .sponsor-tier-gold .sponsor-card:first-child:last-child {
            grid-column: 1 / -1;
        }
}

@media (max-width: 380px) {
    .sponsor-card,
    .sponsor-tier-gold .sponsor-card,
    .sponsor-tier-bronze .sponsor-card {
        height: 100px;
        padding: 13px 10px;
    }
}

/* About */

.about-section {
    position: relative;
    padding: 110px 0;
    overflow: hidden;
    background: radial-gradient( circle at 100% 8%, rgba(24, 169, 192, 0.11), transparent 26% ), linear-gradient(180deg, #fff 0%, #f7fbff 100%);
}

    .about-section::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 230px;
        height: 7px;
        border-radius: 0 0 20px;
        background: linear-gradient( 90deg, var(--conference-purple), var(--conference-blue), var(--conference-cyan) );
    }

.about-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(310px, 0.8fr);
    width: min(1120px, 100%);
    margin: 0 auto 80px;
    overflow: hidden;
    border-radius: 28px;
    background: #fff;
    box-shadow: 0 25px 75px rgba(29, 47, 83, 0.11);
}

.about-intro-content {
    padding: 55px 54px;
}

.about-eyebrow {
    display: inline-flex;
    margin-bottom: 18px;
    color: var(--conference-red);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.about-intro-content h3 {
    max-width: 660px;
    margin: 0 0 22px;
    color: var(--conference-purple);
    font-size: clamp(28px, 3.3vw, 43px);
    font-weight: 850;
    line-height: 1.13;
    letter-spacing: -0.035em;
}

.about-intro-content > p {
    max-width: 660px;
    margin: 0;
    color: var(--conference-muted);
    font-size: 16px;
    line-height: 1.75;
}

.about-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 38px;
    padding-top: 30px;
    border-top: 1px solid var(--conference-border);
}

.about-fact {
    display: flex;
    align-items: center;
    gap: 11px;
}

    .about-fact strong {
        color: var(--conference-blue);
        font-size: 30px;
        font-weight: 850;
        line-height: 1;
        letter-spacing: -0.04em;
    }

    .about-fact span {
        color: var(--conference-muted);
        font-size: 11px;
        font-weight: 650;
        line-height: 1.35;
    }

.about-organizers {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 48px 38px 35px;
    overflow: hidden;
    color: #fff;
    background: radial-gradient( circle at 100% 0, rgba(24, 169, 192, 0.7), transparent 42% ), linear-gradient( 155deg, var(--conference-purple-dark), var(--conference-blue) );
}

    .about-organizers::after {
        content: "";
        position: absolute;
        right: -105px;
        bottom: -120px;
        width: 280px;
        height: 280px;
        border: 40px solid rgba(255, 255, 255, 0.055);
        border-radius: 50%;
    }

.about-organizers-label {
    position: relative;
    z-index: 1;
    margin-bottom: 23px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 11px;
    font-weight: 750;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.organizer-list {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 18px;
}

.organizer-item {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 11px;
    align-items: start;
}

.organizer-number {
    padding-top: 2px;
    color: #63e3ed;
    font-size: 11px;
    font-weight: 800;
}

.organizer-item p {
    margin: 0;
    color: rgba(255, 255, 255, 0.88);
    font-size: 13px;
    font-weight: 600;
    line-height: 1.55;
}

.about-organizers-logos {
    position: relative;
    z-index: 1;
    display: block;
    width: 100%;
    height: auto;
    margin-top: auto;
    padding: 15px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.93);
}

/* Directions */

.directions-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 40px;
    width: min(1120px, 100%);
    margin: 0 auto 31px;
}

    .directions-heading h3 {
        margin: 8px 0 0;
        color: var(--conference-purple);
        font-size: clamp(29px, 4vw, 42px);
        font-weight: 850;
        letter-spacing: -0.035em;
    }

    .directions-heading > p {
        width: min(400px, 100%);
        margin: 0;
        color: var(--conference-muted);
        font-size: 14px;
        line-height: 1.65;
    }

.directions-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    width: min(1120px, 100%);
    margin: 0 auto;
}

.direction-card {
    position: relative;
    min-height: 260px;
    padding: 29px;
    overflow: hidden;
    border: 1px solid var(--conference-border);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.91);
    box-shadow: 0 12px 35px rgba(29, 47, 83, 0.06);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

    .direction-card:hover {
        border-color: rgba(24, 169, 192, 0.45);
        transform: translateY(-6px);
        box-shadow: 0 21px 45px rgba(29, 47, 83, 0.12);
    }

.direction-number {
    position: absolute;
    top: 22px;
    right: 24px;
    color: rgba(51, 37, 140, 0.1);
    font-size: 32px;
    font-weight: 850;
}

.direction-icon {
    display: grid;
    width: 50px;
    height: 50px;
    margin-bottom: 22px;
    place-items: center;
    border-radius: 15px;
    background: rgba(24, 169, 192, 0.11);
    color: var(--conference-blue);
    font-size: 22px;
}

.direction-card:nth-child(4n + 2) .direction-icon {
    background: rgba(237, 0, 25, 0.08);
    color: var(--conference-red);
}

.direction-card:nth-child(4n + 3) .direction-icon {
    background: rgba(255, 152, 27, 0.12);
    color: #db7c00;
}

.direction-card:nth-child(4n + 4) .direction-icon {
    background: rgba(51, 37, 140, 0.1);
    color: var(--conference-purple);
}

.direction-card h4 {
    margin: 0 0 12px;
    color: var(--conference-ink);
    font-size: 18px;
    font-weight: 800;
    line-height: 1.3;
}

.direction-card p {
    margin: 0;
    color: var(--conference-muted);
    font-size: 13px;
    line-height: 1.7;
}

/* Young scientists */

.young-scientists {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 32px;
    width: min(1120px, 100%);
    margin: 42px auto 0;
    padding: 34px 38px;
    overflow: hidden;
    border-radius: 23px;
    color: #fff;
    background: radial-gradient( circle at 82% 0, rgba(24, 169, 192, 0.65), transparent 38% ), linear-gradient( 130deg, var(--conference-purple-dark), var(--conference-blue) );
    box-shadow: 0 22px 55px rgba(27, 50, 104, 0.2);
}

    .young-scientists::after {
        content: "";
        position: absolute;
        right: 14%;
        bottom: -105px;
        width: 210px;
        height: 210px;
        border: 30px solid rgba(255, 255, 255, 0.05);
        border-radius: 50%;
    }

.young-scientists-date {
    position: relative;
    z-index: 1;
    min-width: 110px;
    padding-right: 30px;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

    .young-scientists-date span,
    .young-scientists-date strong {
        display: block;
    }

    .young-scientists-date span {
        font-size: 16px;
        font-weight: 750;
    }

    .young-scientists-date strong {
        color: #65e4ee;
        font-size: 32px;
        font-weight: 850;
    }

.young-scientists-content {
    position: relative;
    z-index: 1;
}

.young-scientists-label {
    color: #65e4ee;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.young-scientists-content h3 {
    margin: 6px 0 8px;
    color: #fff;
    font-size: 25px;
    font-weight: 850;
}

.young-scientists-content p {
    max-width: 590px;
    margin: 0;
    color: rgba(255, 255, 255, 0.75);
    font-size: 13px;
    line-height: 1.55;
}

.young-scientists-link {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 13px;
    min-width: 175px;
    padding: 14px 20px;
    border: 1px solid rgba(255, 255, 255, 0.34);
    border-radius: 999px;
    color: #fff;
    font-size: 13px;
    font-weight: 750;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

    .young-scientists-link:hover {
        color: var(--conference-purple);
        background: #fff;
        transform: translateY(-2px);
    }

/* Responsive */

@media (max-width: 991.98px) {
    .about-intro {
        grid-template-columns: 1fr;
    }

    .about-organizers-logos {
        max-width: 540px;
        margin-top: 28px;
    }

    .directions-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .young-scientists {
        grid-template-columns: auto 1fr;
    }

    .young-scientists-link {
        grid-column: 2;
        justify-self: start;
    }
}

@media (max-width: 767.98px) {
    .about-section {
        padding: 75px 0;
    }

    .about-intro {
        margin-bottom: 58px;
        border-radius: 20px;
    }

    .about-intro-content,
    .about-organizers {
        padding: 29px 22px;
    }

        .about-intro-content h3 {
            font-size: 27px;
        }

    .about-facts {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 22px 15px;
    }

    .about-fact:last-child {
        grid-column: 1 / -1;
    }

    .directions-heading {
        display: block;
    }

        .directions-heading > p {
            margin-top: 13px;
        }

    .directions-grid {
        grid-template-columns: 1fr;
        gap: 13px;
    }

    .direction-card {
        min-height: auto;
        padding: 24px 22px;
    }

    .young-scientists {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 28px 22px;
    }

    .young-scientists-date {
        padding: 0 0 17px;
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    }

    .young-scientists-link {
        grid-column: auto;
        width: 100%;
    }
}

/* Venue */

.venue-section {
    position: relative;
    padding: 110px 0;
    overflow: hidden;
    background: radial-gradient( circle at 10% 90%, rgba(24, 169, 192, 0.1), transparent 30% ), #f5f9fd;
}

    .venue-section::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 230px;
        height: 7px;
        border-radius: 0 0 20px;
        background: linear-gradient( 90deg, var(--conference-purple), var(--conference-blue), var(--conference-cyan) );
    }

.venue-layout {
    display: grid;
    grid-template-columns: minmax(330px, 0.82fr) minmax(0, 1.18fr);
    width: min(1120px, 100%);
    min-height: 520px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 28px;
    background: #fff;
    box-shadow: 0 28px 80px rgba(29, 47, 83, 0.13);
}

.venue-content {
    position: relative;
    z-index: 2;
    padding: 55px 48px;
}

    .venue-content h2 {
        margin: 9px 0 30px;
        color: var(--conference-purple);
        font-size: clamp(35px, 4vw, 50px);
        font-weight: 850;
        line-height: 1.08;
        letter-spacing: -0.04em;
    }

.venue-name {
    margin-bottom: 20px;
    color: var(--conference-ink);
    font-size: 23px;
    font-weight: 800;
    line-height: 1.25;
}

.venue-address {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin: 0;
    color: var(--conference-muted);
    font-size: 15px;
    font-style: normal;
    line-height: 1.65;
}

.venue-address-icon {
    display: grid;
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 13px;
    background: rgba(237, 0, 25, 0.09);
    color: var(--conference-red);
    font-size: 19px;
}

.venue-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 17px;
    margin-top: 32px;
}

.venue-route-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 22px;
    border-radius: 999px;
    background: var(--conference-red);
    color: #fff;
    font-size: 13px;
    font-weight: 750;
    text-decoration: none;
    box-shadow: 0 12px 28px rgba(237, 0, 25, 0.22);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

    .venue-route-button:hover {
        color: #fff;
        background: #cc0016;
        transform: translateY(-2px);
        box-shadow: 0 16px 34px rgba(237, 0, 25, 0.28);
    }

.venue-map-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--conference-purple);
    font-size: 13px;
    font-weight: 750;
    text-decoration: none;
}

    .venue-map-link:hover {
        color: var(--conference-red);
    }

.venue-note {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    margin-top: 35px;
    padding: 15px 17px;
    border: 1px solid rgba(24, 169, 192, 0.2);
    border-radius: 13px;
    background: rgba(24, 169, 192, 0.07);
    color: var(--conference-muted);
}

    .venue-note i {
        flex: 0 0 auto;
        margin-top: 2px;
        color: var(--conference-cyan);
    }

    .venue-note p {
        margin: 0;
        font-size: 12px;
        line-height: 1.55;
    }

/* Map */

.venue-map {
    position: relative;
    min-height: 520px;
    overflow: hidden;
    background: #dfeaf2;
}

    .venue-map iframe {
        display: block;
        width: 100%;
        height: 100%;
        min-height: 520px;
        border: 0;
        filter: saturate(0.85) contrast(0.96);
    }

    .venue-map::after {
        content: "";
        position: absolute;
        inset: 0;
        pointer-events: none;
        box-shadow: inset 20px 0 35px rgba(28, 45, 69, 0.08);
    }

.venue-map-label {
    position: absolute;
    right: 22px;
    bottom: 22px;
    left: 22px;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 17px;
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--conference-muted);
    font-size: 12px;
    line-height: 1.35;
    box-shadow: 0 15px 40px rgba(29, 47, 83, 0.16);
    backdrop-filter: blur(10px);
}

    .venue-map-label strong {
        display: block;
        margin-bottom: 2px;
        color: var(--conference-purple);
        font-size: 14px;
    }

.venue-map-pin {
    display: grid;
    flex: 0 0 39px;
    width: 39px;
    height: 39px;
    place-items: center;
    border-radius: 50%;
    background: var(--conference-red);
    color: #fff;
    font-size: 17px;
    box-shadow: 0 8px 20px rgba(237, 0, 25, 0.24);
}

/* Tablet */

@media (max-width: 991.98px) {
    .venue-layout {
        grid-template-columns: 1fr;
    }

    .venue-map,
    .venue-map iframe {
        min-height: 430px;
    }
}

/* Mobile */

@media (max-width: 767.98px) {
    .venue-section {
        padding: 75px 0;
    }

    .venue-layout {
        min-height: auto;
        border-radius: 20px;
    }

    .venue-content {
        padding: 30px 22px;
    }

        .venue-content h2 {
            margin-bottom: 24px;
            font-size: 34px;
        }

    .venue-name {
        font-size: 20px;
    }

    .venue-actions {
        align-items: stretch;
    }

    .venue-route-button {
        width: 100%;
    }

    .venue-map-link {
        width: 100%;
        justify-content: center;
    }

    .venue-map,
    .venue-map iframe {
        min-height: 350px;
    }

    .venue-map-label {
        right: 13px;
        bottom: 13px;
        left: 13px;
    }
}