:root {
    --bg-dark: #0d1117;
    --bg-darker: #030708;
    --text-primary: #e2e2db;
    --text-secondary: #b0b0b0;
    --text-dim: #666666;
    --accent-orange: #f7a531;
    --accent-blue: #285b92;
    --accent-pink: #d94c78;
    --border: #1c2021;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

    /* 8px spacing scale */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 40px;
    --space-2xl: 48px;
}

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

.footer {
    text-align: center;
    margin-top: auto;
    padding: var(--space-lg) 0 var(--space-md);
    border-top: 1px solid var(--border);
    color: var(--text-dim);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    align-items: center;
}

.footer a {
    color: var(--accent-orange);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
    font-weight: 1000;
}

.footer a:hover {
    color: var(--accent-pink);
}

.footer-license {
    font-size: 12px;
    color: var(--text-dim);
    font-weight: 1000;
}

.footer-copyright {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: var(--space-xs);
}

body {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.4;
    min-height: 100vh;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 48px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 6vh;
}

.hero {
    text-align: center;
    margin-bottom: 0;
}

.logo-container {
    position: relative;
    margin-bottom: var(--space-lg);
    display: inline-block;
    max-width: 100%;
}

.logo {
    width: 100%;
    max-width: 600px;
    height: auto;
    display: block;
    filter: drop-shadow(0 0 40px rgba(255, 133, 0, 0.15));
}

.alpha-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-orange);
    color: var(--bg-dark);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 1000;
    letter-spacing: 1px;
    border-radius: 3px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.8);
    z-index: 10;
    white-space: nowrap;
}

.hero-tagline {
    font-size: 40px;
    font-weight: 1000;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    line-height: 1.0;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    max-width: 510px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    text-align: left;
    font-weight: 1000;
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.btn-primary {
    background: var(--accent-orange);
    color: var(--bg-dark);
    border: none;
    padding: 14px 32px;
    font-size: 20px;
    font-weight: 600;
    font-family: var(--font-sans);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--accent-pink);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 3px solid var(--border);
    padding: 12px 30px;
    font-size: 20px;
    font-weight: 1000;
    font-family: var(--font-sans);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--bg-dark);
}

.btn-secondary:active {
    transform: translateY(0);
}

.section-title {
    font-size: 24px;
    font-weight: 1000;
    color: var(--accent-orange);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 6.0px;
    text-align: center;
}

@media (max-width: 1024px) {
    .container {
        padding-left: 32px;
        padding-right: 32px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 0;
        overflow-x: hidden;
        overflow-y: auto;
    }

    .container {
        padding: 0 24px;
        padding-top: 4vh;
    }

    .hero {
        margin-bottom: 32px;
    }

    .logo {
        max-width: 90vw;
    }

    .alpha-badge {
        padding: 6px 12px;
        font-size: 11px;
        letter-spacing: 0.8px;
        right: -4px;
        top: -4px;
    }

    .hero-tagline {
        font-size: 32px;
        margin-bottom: 24px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        margin-bottom: 20px;
        gap: var(--space-sm);
    }

    .btn-primary,
    .btn-secondary {
        text-align: center;
        font-size: 16px;
        padding: 12px 24px;
    }

    .section-title {
        font-size: 20px;
        letter-spacing: 3px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .code-demo {
        padding: 16px;
        font-size: 13px;
        line-height: 1.5;
    }

    .footer {
        margin-top: var(--space-lg);
        padding: var(--space-md) 0;
    }
}

.interactive-demo {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    margin: 0;
    font-family: "JetBrains Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    font-size: 14px;
    overflow-x: auto;
    line-height: 1.5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    text-align: left;
}

.demo-title {
    font-size: 16px;
    font-weight: 1000;
    color: var(--accent-orange);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 2.3px;
    font-family: var(--font-sans);
    text-align: center;
}

.demo-subtitle {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 16px;
    font-family: var(--font-sans);
    text-align: center;
    font-weight: bold;
    text-align: center;
}


.demo-grid {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 12px 16px;
    align-items: center;
}

.demo-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
    font-family: var(--font-sans);
}

.demo-input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: "JetBrains Mono", monospace;
    font-size: 14px;
    padding: 6px 10px;
    border-radius: 4px;
    outline: none;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}

.demo-input:hover {
    border-color: var(--accent-orange);
}

.demo-input:focus {
    background-color: var(--bg-darker);
    border: 1px solid var(--accent-orange);
    box-shadow: 0 0 0 2px rgba(247, 165, 49, 0.1);
}

.demo-value {
    font-family: "JetBrains Mono", monospace;
    font-size: 14px;
    color: var(--text-primary);
}

.signature-hex {
    font-family: "JetBrains Mono", monospace;
    font-size: 13px;
}

.signature-hex.verified {
    color: #28a745;
}

.signature-hex.failed {
    color: #dc3545;
}

.verified {
    color: #28a745;
    font-weight: 700;
}

.failed {
    color: #dc3545;
    font-weight: 700;
    text-transform: uppercase;
}

.demo-reset-btn {
    margin-top: 12px;
    background: var(--accent-blue);
    color: var(--text-primary);
    border: none;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-sans);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
}
.demo-reset-btn:hover {
    background: var(--accent-orange);
    transform: translateY(-1px);
}
.demo-reset-btn:active {
    transform: translateY(0);
}

.hidden {
    display: none;
}