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

:root {
    --bg-color: #0a0a0f;
    --card-bg: #1a1a2e;
    --border-color: #2d2d44;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-color: #00ff88;
    --download-btn-bg: #00ff88;
    --download-btn-text: #0a0a0f;
    --red-color: #ff3366;
    --yellow-color: #ffcc00;
    --blue-color: #00ccff;
    --green-color: #00ff88;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px;
}

.header {
    text-align: center;
    padding: 20px 0;
}

.logo {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent-color);
    text-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.hero {
    text-align: center;
    padding: 30px 0;
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.download-area {
    margin-bottom: 20px;
}

.download-btn {
    background: linear-gradient(135deg, var(--download-btn-bg), #00cc6a);
    color: var(--download-btn-text);
    border: none;
    padding: 16px 48px;
    font-size: 20px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.6);
}

.highlight-box {
    display: inline-block;
    border: 3px solid var(--red-color);
    border-radius: 8px;
    padding: 12px 32px;
    background: rgba(255, 51, 102, 0.1);
}

.highlight-text {
    color: var(--red-color);
    font-size: 24px;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(255, 51, 102, 0.5);
}

.stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin: 20px 0;
}

.stat-item {
    text-align: center;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
}

.stat-value.red {
    color: var(--red-color);
    text-shadow: 0 0 10px rgba(255, 51, 102, 0.5);
}

.stat-value.yellow {
    color: var(--yellow-color);
    text-shadow: 0 0 10px rgba(255, 204, 0, 0.5);
}

.stat-value.blue {
    color: var(--blue-color);
    text-shadow: 0 0 10px rgba(0, 204, 255, 0.5);
}

.features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 30px 0;
}

.feature-tag {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.2), rgba(0, 204, 255, 0.2));
    border: 1px solid rgba(0, 255, 136, 0.3);
    color: var(--accent-color);
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 600;
}

.description {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 30px;
}

.description p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.download-link {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 30px;
}

.download-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #00ccff, #0099ff);
    color: white;
    padding: 16px 40px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(0, 204, 255, 0.4);
}

.download-link-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 204, 255, 0.6);
}

.password-box {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 204, 0, 0.1);
    border: 2px solid var(--yellow-color);
    border-radius: 8px;
    padding: 10px 20px;
    margin-top: 16px;
}

.password-label {
    font-size: 14px;
    color: var(--yellow-color);
    font-weight: 600;
}

.password-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--yellow-color);
    letter-spacing: 4px;
    text-shadow: 0 0 10px rgba(255, 204, 0, 0.5);
    font-family: 'Courier New', monospace;
}

.copy-btn {
    background: var(--yellow-color);
    color: #0a0a0f;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: #ffaa00;
    transform: scale(1.05);
}

.contact-seller {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-secondary);
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
}

.warning-text {
    color: var(--red-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    display: block;
}

.tutorial {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.tab-btn.active {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(0, 255, 136, 0.1);
}

.tab-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.step {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
}

.step:last-child {
    margin-bottom: 0;
}

.step-num {
    background: var(--accent-color);
    color: var(--download-btn-text);
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 4px;
    white-space: nowrap;
    font-size: 14px;
}

.step-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.faq-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    width: 100%;
    transition: background 0.3s ease;
}

.faq-header:hover {
    background: rgba(0, 255, 136, 0.05);
}

.faq-icon {
    color: var(--accent-color);
    font-size: 14px;
    transition: transform 0.3s ease;
}

.faq-icon.open {
    transform: rotate(90deg);
}

.faq-title {
    font-size: 15px;
    font-weight: 600;
    text-align: left;
    flex: 1;
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-content.open {
    max-height: 200px;
}

.faq-content p {
    padding: 0 16px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-content a {
    color: var(--blue-color);
    text-decoration: none;
}

.faq-content a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .logo {
        font-size: 36px;
    }

    .hero-title {
        font-size: 28px;
    }

    .download-btn {
        font-size: 16px;
        padding: 12px 24px;
    }

    .highlight-text {
        font-size: 18px;
    }

    .stats {
        flex-direction: column;
        align-items: center;
    }

    .features {
        flex-direction: column;
        align-items: center;
    }

    .step {
        flex-direction: column;
        gap: 8px;
    }

    .tabs {
        flex-direction: column;
    }
}