:root {
    --bg: #FFFFFF;
    --text: #17191b;
    --accent: #17191b;
    --hover: #313c48;
    --border: #e5e7eb;
    --light: #f9fafb;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    font-weight: 400;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    height: 44px;
    width: auto;
    display: block;
}

nav a {
    color: var(--text);
    text-decoration: none;
    margin-left: 40px;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--hover);
}

/* HERO */
.hero {
    padding-top: 140px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--light);
}

.hero-grid {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.hero-text h1 {
    font-size: 4.8rem;
    font-weight: 700;
    letter-spacing: -3.5px;
    line-height: 1.05;
    margin-bottom: 12px;
}

.subtitle {
    font-size: 1.18rem;
    color: #555;
    margin-bottom: 32px;
    letter-spacing: 3px;
    font-weight: 400;
}

.description {
    font-size: 1.32rem;
    max-width: 480px;
    margin-bottom: 48px;
    color: #2c2c2c;
}

.login-box {
    background: #fff;
    border: 1px solid var(--border);
    padding: 36px 32px;
    box-shadow: 0 15px 40px rgba(23, 25, 27, 0.07);
    max-width: 400px;
    border-radius: 4px;
}

.login-box h2 {
    font-size: 1.45rem;
    margin-bottom: 24px;
    text-align: center;
    font-weight: 600;
}

.login-image {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid #f0f0f0;
    border-radius: 3px;
}

.login-note {
    text-align: center;
    font-size: 0.92rem;
    color: #666;
    margin-top: 16px;
}

/* MIRRORS */
.mirrors-box h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #1f1f1f;
    font-weight: 600;
}

.mirrors {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.mirror-link {
    display: block;
    padding: 17px 22px;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--accent);
    text-decoration: none;
    font-family: ui-monospace, monospace;
    font-size: 1rem;
    transition: all 0.25s ease;
    border-radius: 4px;
    word-break: break-all;
}

.mirror-link:hover {
    background: #f8f9fa;
    border-color: var(--hover);
    color: var(--hover);
    transform: translateY(-1px);
}

.mirror-note,
.seo-text {
    font-size: 0.92rem;
    color: #666;
    margin-top: 24px;
    line-height: 1.5;
}

/* SECTIONS */
.section {
    padding: 140px 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 2.65rem;
    font-weight: 600;
    letter-spacing: -1.2px;
}

.section-sub {
    color: #555;
    font-size: 1.15rem;
    margin-top: 14px;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.section-image {
    width: 100%;
    height: auto;
    box-shadow: 0 25px 55px rgba(23, 25, 27, 0.1);
    border: 1px solid #f0f0f0;
    border-radius: 6px;
}

/* TEXT BLOCK */
.text-block h3 {
    font-size: 2rem;
    margin-bottom: 26px;
    line-height: 1.3;
    font-weight: 600;
}

.text-block p {
    margin-bottom: 20px;
    color: #333;
}

.text-block ul {
    margin-top: 24px;
    padding-left: 24px;
}

.text-block li {
    margin-bottom: 11px;
    position: relative;
}

.text-block li:before {
    content: "•";
    color: var(--accent);
    position: absolute;
    left: -18px;
}

/* FEATURES */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 36px;
}

.feature-item {
    background: var(--light);
    padding: 36px 30px;
    border: 1px solid var(--border);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border-radius: 6px;
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(23, 25, 27, 0.08);
}

.feature-item h4 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    font-weight: 600;
}

/* STEPS */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 42px;
}

.step {
    position: relative;
    padding-left: 68px;
}

.step-number {
    position: absolute;
    left: 0;
    top: 0;
    background: var(--accent);
    color: #fff;
    width: 52px;
    height: 52px;
    line-height: 52px;
    text-align: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.35rem;
}

.step h4 {
    font-size: 1.45rem;
    margin-bottom: 14px;
    font-weight: 600;
}

/* WALLET */
.wallet-status {
    margin-top: 36px;
    padding: 20px 26px;
    background: #f8f9fa;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1.02rem;
    border-radius: 4px;
}

.status-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

/* RULES */
.rules-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 70px;
}

.rule-block h4 {
    margin-bottom: 20px;
    font-size: 1.45rem;
    font-weight: 600;
}

.rule-block ul {
    padding-left: 20px;
}

.rule-block ul li {
    margin-bottom: 12px;
}

.warning-box {
    background: #fef2f2;
    border-left: 6px solid #ef4444;
    padding: 32px 36px;
    font-size: 1.05rem;
    border-radius: 4px;
}

/* FOOTER */
footer {
    background: var(--accent);
    color: #aaa;
    text-align: center;
    padding: 90px 20px 60px;
}

.footer-content p {
    margin-bottom: 18px;
}

.footer-links a {
    color: #bbb;
    text-decoration: none;
    margin: 0 14px;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #fff;
}

.seo-footer {
    font-size: 0.9rem;
    margin-top: 40px;
    color: #777;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .hero-grid,
    .content-grid,
    .rules-grid {
        grid-template-columns: 1fr;
        gap: 80px;
    }
    
    .hero-text h1 {
        font-size: 3.6rem;
    }
    
    .section {
        padding: 110px 30px;
    }
}

@media (max-width: 640px) {
    .header-content {
        padding: 18px 24px;
    }
    
    nav a {
        margin-left: 20px;
        font-size: 14px;
    }
    
    .hero {
        padding-top: 110px;
    }
    
    .hero-text h1 {
        font-size: 3rem;
    }
}

.hero h1 {
    font-size: 4.6rem;
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -3px;
}

.hero .subtitle {
    font-size: 1.2rem;
    letter-spacing: 2.5px;
    color: #444;
}

.mirrors-box h3 {
    font-size: 1.35rem;
    font-weight: 600;
}

.mirror-link {
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.mirror-link:hover {
    background-color: #f8f9fa;
    border-color: #313c48;
    color: #313c48;
}

.section-header h2 {
    font-size: 2.55rem;
    font-weight: 600;
    letter-spacing: -1px;
}

.feature-item {
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(23,25,27,0.07);
}

.step-number {
    transition: background-color 0.2s ease;
}

.step:hover .step-number {
    background-color: #313c48;
}

.text-block h3 {
    font-size: 1.95rem;
    font-weight: 600;
}

.warning-box {
    border-radius: 4px;
}

footer {
    padding: 85px 20px 55px;
}

@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3.5rem;
    }
    .section-header h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 640px) {
    .hero-grid {
        gap: 60px;
    }
    nav a {
        margin-left: 18px;
        font-size: 14.5px;
    }
}