@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #ffffff;
    overflow-x: hidden;
    background: #f5f5f5;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
}

.navbar {
    padding: 20px 0;
}

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

.logo img {
    height: 50px;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #f7931a;
}

.btn-participate {
    background: linear-gradient(90deg, #f7931a 0%, #ff9500 100%);
    padding: 12px 32px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-participate:hover {
    color: #ffffff;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: #ffffff;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hero {
    min-height: auto;
    background: url('hero-bg.png') center center / cover no-repeat;
    display: flex;
    align-items: center;
    padding: 120px 0 0;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.4) 100%);
}

.hero-content {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-left {
    flex: 1;
    max-width: 650px;
    padding-bottom: 80px;
}

.hero-location {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    font-size: 18px;
    font-weight: 500;
}

.hero-title {
    font-size: 80px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: linear-gradient(90deg, #f7931a 0%, #ff9500 100%);
    color: #ffffff;
}

.btn-primary:hover {
    box-shadow: 0 8px 20px rgba(247, 147, 26, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero-right {
    flex-shrink: 0;
}

.hero-right img {
    max-width: 900px;
    width: 100%;
    height: auto;
    display: block;
}

.speakers {
    padding: 80px 0;
    background: #f5f5f5;
}

.section-title {
    font-size: 56px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    color: #000000;
}

.section-title .accent {
    color: #f7931a;
}

.speakers-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 24px;
}

.speaker-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 1;
}

.speaker-card-main {
    background: url('main-speaker-card-bg.png') center center / cover no-repeat;
    aspect-ratio: 1.5;
}

.speaker-card-square {
    background: #000000;
}

.speaker-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.speaker-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 16px 20px;
    border-radius: 12px;
}

.speaker-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: #000000;
    margin-bottom: 4px;
}

.speaker-name svg {
    flex-shrink: 0;
}

.speaker-position {
    font-size: 16px;
    font-weight: 500;
    color: #666666;
}

.rules {
    padding: 80px 0;
    background: #f5f5f5;
}

.rules-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.rule-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.rule-title {
    font-size: 28px;
    font-weight: 700;
    color: #000000;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.rule-emoji {
    width: 32px;
    height: 32px;
    display: inline-block;
}

.rule-text {
    font-size: 18px;
    line-height: 1.7;
    color: #333333;
    font-weight: 400;
}

.participate {
    padding: 80px 0;
    background: #f5f5f5;
}

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

.participate-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 32px;
}

.participate-qr {
    width: 180px;
    height: 180px;
    flex-shrink: 0;
    border-radius: 8px;
}

.participate-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 16px;
}

.participate-coin {
    display: flex;
    align-items: center;
    gap: 12px;
}

.coin-icon {
    width: 40px;
    height: 40px;
}

.participate-coin span {
    font-size: 24px;
    font-weight: 700;
    color: #000000;
}

.participate-description {
    font-size: 16px;
    color: #333333;
    line-height: 1.6;
}

.wallet-address-block {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.05);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.wallet-address {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    color: #000000;
    word-break: break-all;
    font-family: 'Courier New', monospace;
}

.copy-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    color: #666666;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.copy-btn:hover {
    background: rgba(247, 147, 26, 0.1);
    color: #f7931a;
}

.copy-btn.copied {
    color: #f7931a;
}

.transactions {
    padding: 80px 0;
    background: #f5f5f5;
}

.transactions-table {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    overflow-x: auto;
}

.transactions-table table {
    width: 100%;
    border-collapse: collapse;
}

.transactions-table thead {
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
}

.transactions-table th {
    padding: 16px;
    text-align: left;
    font-size: 16px;
    font-weight: 700;
    color: #000000;
}

.transactions-table th.highlight-to {
    color: #f7931a;
}

.transactions-table td {
    padding: 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.transactions-table tbody tr:last-child td {
    border-bottom: none;
}

.currency-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.currency-cell .currency-icon {
    width: 28px;
    height: 28px;
}

.currency-cell span {
    font-size: 16px;
    font-weight: 600;
    color: #000000;
}

.address-cell {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #333333;
}

.amount-cell {
    font-size: 16px;
    font-weight: 600;
    color: #000000;
}

.highlight-to {
    color: #f7931a;
}

.footer {
    background: #000000;
    padding: 60px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
}

.footer-logo {
    height: 50px;
    width: auto;
}

.footer-text {
    font-size: 16px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
    max-width: 800px;
    font-weight: 400;
}

.footer-link {
    color: #f7931a;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #ff9500;
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 64px;
    }

    .hero-right img {
        max-width: 700px;
    }

    .section-title {
        font-size: 48px;
    }

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

    .speaker-card-main {
        grid-column: 1 / -1;
    }

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

    .rule-card {
        padding: 32px;
    }

    .rule-title {
        font-size: 24px;
    }

    .rule-text {
        font-size: 16px;
    }

    .participate-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .participate-card {
        padding: 32px;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .participate-qr {
        width: 160px;
        height: 160px;
        margin-bottom: 24px;
    }

    .participate-content {
        align-items: center;
    }

    .transactions {
        padding: 60px 0;
    }

    .transactions-table {
        padding: 32px;
    }

    .transactions-table th,
    .transactions-table td {
        padding: 12px;
    }
}

@media (max-width: 768px) {
    .footer {
        padding: 50px 0;
    }

    .footer-logo {
        height: 40px;
    }

    .footer-text {
        font-size: 14px;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 40px 40px;
        gap: 30px;
        transition: right 0.3s ease;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        right: 0;
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 101;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-content {
        flex-direction: column;
        gap: 40px;
    }

    .hero-left {
        max-width: 100%;
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-right {
        display: none;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .speakers {
        padding: 60px 0;
    }

    .section-title {
        font-size: 36px;
        margin-bottom: 40px;
    }

    .speakers-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .speaker-card {
        aspect-ratio: 1;
    }

    .speaker-card-main {
        grid-column: 1;
        aspect-ratio: 1;
    }

    .speaker-badge {
        bottom: 16px;
        left: 16px;
        right: 16px;
        padding: 14px 16px;
    }

    .speaker-name {
        font-size: 18px;
    }

    .speaker-position {
        font-size: 14px;
    }

    .rules {
        padding: 60px 0;
    }

    .rules-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .rule-card {
        padding: 24px;
    }

    .rule-title {
        font-size: 22px;
        margin-bottom: 16px;
    }

    .rule-emoji {
        width: 28px;
        height: 28px;
    }

    .rule-text {
        font-size: 16px;
    }

    .participate {
        padding: 60px 0;
    }

    .participate-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .participate-card {
        padding: 24px;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .participate-qr {
        width: 140px;
        height: 140px;
        margin-bottom: 20px;
    }

    .participate-content {
        align-items: center;
    }

    .participate-coin span {
        font-size: 20px;
    }

    .coin-icon {
        width: 32px;
        height: 32px;
    }

    .wallet-address {
        font-size: 12px;
    }

    .transactions {
        padding: 60px 0;
    }

    .transactions-table {
        padding: 24px;
    }

    .transactions-table th {
        font-size: 14px;
        padding: 12px 8px;
    }

    .transactions-table td {
        padding: 12px 8px;
        font-size: 13px;
    }

    .currency-cell .currency-icon {
        width: 24px;
        height: 24px;
    }

    .currency-cell span {
        font-size: 14px;
    }

    .address-cell {
        font-size: 12px;
    }

    .amount-cell {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .logo img {
        height: 40px;
    }

    .navbar {
        padding: 15px 0;
    }

    .hero {
        padding: 100px 0 0;
    }

    .hero-left {
        padding-bottom: 50px;
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-location {
        font-size: 16px;
    }

    .btn {
        padding: 14px 32px;
        font-size: 16px;
    }

    .nav-links a {
        font-size: 20px;
    }
}