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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #FFFFFF;
    color: #17191b;
    line-height: 1.65;
    font-size: 16px;
    background-image: 
        linear-gradient(rgba(23,25,27,0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23,25,27,0.018) 1px, transparent 1px);
    background-size: 60px 60px;
}

.container {
    display: flex;
    min-height: 100vh;
    max-width: 1480px;
    margin: 0 auto;
}

.sidebar {
    width: 295px;
    background: #f8f9fa;
    border-right: 1px solid #e5e7eb;
    padding: 48px 32px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    flex-shrink: 0;
}

.logo-container {
    margin-bottom: 72px;
    text-align: center;
}

.logo {
    width: 413px;
    height: 44px;
    object-fit: contain;
    filter: contrast(0.98) brightness(0.96);
}

.archive-nav {
    margin-bottom: 68px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 24px;
    color: #17191b;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.02rem;
    border-radius: 8px;
    margin-bottom: 6px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-item:hover,
.nav-item.active {
    background: #313c48;
    color: #FFFFFF;
}

.mirrors h3 {
    font-size: 0.9rem;
    letter-spacing: 1.8px;
    color: #555;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.mirrors ul {
    list-style: none;
    margin-bottom: 18px;
}

.mirrors a {
    color: #17191b;
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.5;
    display: block;
    padding: 10px 4px;
    transition: color 0.2s ease;
}

.mirrors a:hover {
    color: #313c48;
}

.mirror-note {
    font-size: 0.82rem;
    color: #777;
    line-height: 1.45;
}

.content {
    flex: 1;
    padding: 72px 88px 80px;
    max-width: 960px;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -2.8px;
    line-height: 1.05;
    margin-bottom: 12px;
}

.subtitle {
    color: #5f6368;
    font-size: 1.12rem;
    letter-spacing: 3.5px;
    font-weight: 400;
}

.full-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    margin: 36px 0 42px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.06);
    transition: transform 0.4s ease;
}

.full-image:hover {
    transform: translateY(-4px);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin: 48px 0;
}

.card {
    background: #f8f9fa;
    padding: 28px 26px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.card h3 {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 10px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    font-weight: 500;
}

.status.online {
    color: #0a7c3f;
    font-weight: 600;
    font-size: 1.15rem;
}

.description h2 {
    font-size: 1.72rem;
    margin: 38px 0 20px;
    line-height: 1.25;
}

.description p {
    margin-bottom: 19px;
    font-size: 1.07rem;
    color: #2c2f33;
}

.features ul {
    list-style: none;
    background: #f8f9fa;
    padding: 32px 28px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.features li {
    padding: 13px 0;
    border-bottom: 1px solid #eee;
    font-size: 1.04rem;
}

.features li:last-child {
    border-bottom: none;
}

.market-details h3,
.stats h3,
.howto h3 {
    font-size: 1.68rem;
    margin: 42px 0 22px;
    font-weight: 600;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    background: #f8f9fa;
    padding: 28px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    font-size: 1.03rem;
}

.howto ol {
    counter-reset: step;
    list-style: none;
    padding: 0;
}

.howto li {
    counter-increment: step;
    position: relative;
    padding: 14px 0 14px 48px;
    margin-bottom: 18px;
    font-size: 1.06rem;
    border-left: 3px solid #313c48;
    padding-left: 32px;
}

.howto li:before {
    content: counter(step);
    position: absolute;
    left: -12px;
    top: 12px;
    width: 32px;
    height: 32px;
    background: #313c48;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.05rem;
}

.warning {
    background: #fff4e6;
    color: #9f3a00;
    padding: 22px 28px;
    border-radius: 10px;
    border-left: 5px solid #f59e0b;
    margin: 36px 0;
    font-size: 1.03rem;
}

.tip {
    background: #f0f9ff;
    padding: 22px 28px;
    border-radius: 10px;
    border-left: 5px solid #0ea5e9;
    margin: 32px 0;
    font-size: 1.02rem;
}

footer {
    text-align: center;
    padding: 52px 30px 60px;
    color: #777;
    font-size: 0.89rem;
    background: #f8f9fa;
    border-top: 1px solid #e5e7eb;
    margin-top: 90px;
}

/* Hover effects for links */
a {
    transition: color 0.2s ease;
}

/* Responsive */
@media (max-width: 1100px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 40px 32px 30px;
    }
    .content {
        padding: 50px 40px 70px;
    }
    .header h1 {
        font-size: 2.9rem;
    }
}

@media (max-width: 640px) {
    .content {
        padding: 40px 24px;
    }
    .sidebar {
        padding: 36px 24px;
    }
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #FFFFFF;
    color: #17191b;
    line-height: 1.65;
    font-size: 16px;
    background-image: 
        linear-gradient(rgba(23,25,27,0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23,25,27,0.018) 1px, transparent 1px);
    background-size: 60px 60px;
}

.container {
    display: flex;
    min-height: 100vh;
    max-width: 1480px;
    margin: 0 auto;
}

.sidebar {
    width: 295px;
    background: #f8f9fa;
    border-right: 1px solid #e5e7eb;
    padding: 48px 32px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    flex-shrink: 0;
}

.logo-container {
    margin-bottom: 72px;
    text-align: center;
}

.logo {
    width: 413px;
    height: 44px;
    object-fit: contain;
    filter: contrast(0.98) brightness(0.96);
}

.archive-nav {
    margin-bottom: 68px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 24px;
    color: #17191b;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.02rem;
    border-radius: 8px;
    margin-bottom: 6px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-item:hover,
.nav-item.active {
    background: #313c48;
    color: #FFFFFF;
}

.mirrors h3 {
    font-size: 0.9rem;
    letter-spacing: 1.8px;
    color: #555;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.mirrors ul {
    list-style: none;
    margin-bottom: 18px;
}

.mirrors a {
    color: #17191b;
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.5;
    display: block;
    padding: 10px 4px;
    transition: color 0.2s ease;
}

.mirrors a:hover {
    color: #313c48;
}

.mirror-note {
    font-size: 0.82rem;
    color: #777;
    line-height: 1.45;
}

.content {
    flex: 1;
    padding: 72px 88px 80px;
    max-width: 960px;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -2.8px;
    line-height: 1.05;
    margin-bottom: 12px;
}

.subtitle {
    color: #5f6368;
    font-size: 1.12rem;
    letter-spacing: 3.5px;
    font-weight: 400;
}

.full-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    margin: 36px 0 42px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.06);
    transition: transform 0.4s ease;
}

.full-image:hover {
    transform: translateY(-4px);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin: 48px 0;
}

.card {
    background: #f8f9fa;
    padding: 28px 26px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.card h3 {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 10px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    font-weight: 500;
}

.status.online {
    color: #0a7c3f;
    font-weight: 600;
    font-size: 1.15rem;
}

.description h2 {
    font-size: 1.72rem;
    margin: 38px 0 20px;
    line-height: 1.25;
}

.description p {
    margin-bottom: 19px;
    font-size: 1.07rem;
    color: #2c2f33;
}

.features ul {
    list-style: none;
    background: #f8f9fa;
    padding: 32px 28px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.features li {
    padding: 13px 0;
    border-bottom: 1px solid #eee;
    font-size: 1.04rem;
}

.features li:last-child {
    border-bottom: none;
}

.market-details h3,
.stats h3,
.howto h3 {
    font-size: 1.68rem;
    margin: 42px 0 22px;
    font-weight: 600;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    background: #f8f9fa;
    padding: 28px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    font-size: 1.03rem;
}

.howto ol {
    counter-reset: step;
    list-style: none;
    padding: 0;
}

.howto li {
    counter-increment: step;
    position: relative;
    padding: 14px 0 14px 48px;
    margin-bottom: 18px;
    font-size: 1.06rem;
    border-left: 3px solid #313c48;
    padding-left: 32px;
}

.howto li:before {
    content: counter(step);
    position: absolute;
    left: -12px;
    top: 12px;
    width: 32px;
    height: 32px;
    background: #313c48;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.05rem;
}

.warning {
    background: #fff4e6;
    color: #9f3a00;
    padding: 22px 28px;
    border-radius: 10px;
    border-left: 5px solid #f59e0b;
    margin: 36px 0;
    font-size: 1.03rem;
}

.tip {
    background: #f0f9ff;
    padding: 22px 28px;
    border-radius: 10px;
    border-left: 5px solid #0ea5e9;
    margin: 32px 0;
    font-size: 1.02rem;
}

footer {
    text-align: center;
    padding: 52px 30px 60px;
    color: #777;
    font-size: 0.89rem;
    background: #f8f9fa;
    border-top: 1px solid #e5e7eb;
    margin-top: 90px;
}

a {
    transition: color 0.2s ease;
}

@media (max-width: 1100px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 40px 32px 30px;
    }
    .content {
        padding: 50px 40px 70px;
    }
    .header h1 {
        font-size: 2.9rem;
    }
}

@media (max-width: 640px) {
    .content {
        padding: 40px 24px;
    }
    .sidebar {
        padding: 36px 24px;
    }
}

.section {
    display: none;
}

.section:target,
#home {
    display: block;
}

.nav-item {
    transition: all 0.2s ease;
}

.nav-item:target {
    background: #313c48;
    color: #FFFFFF;
}

.nav-item[href="#home"]:target,
.nav-item[href="#overview"]:target,
.nav-item[href="#market"]:target,
.nav-item[href="#guide"]:target,
.nav-item[href="#security"]:target,
.nav-item[href="#wallet"]:target,
.nav-item[href="#policies"]:target {
    background: #313c48;
    color: #FFFFFF;
}