/* Existential Birds - strict adherence to brand guidelines */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #0a1420;
    color: #c9d1d9;
    font-family: 'IBM Plex Sans', sans-serif;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.container {
    text-align: center;
    max-width: 600px;
}

/* Logomark - hero image above title */
.logomark {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin-bottom: 2rem;
}

/* Headings use Fog - hierarchy via weight/spacing, not color */
h1 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
    color: #c9d1d9;
}

/* Iris for secondary emphasis in brand statement */
.accent {
    color: #726da8;
}

/* Secondary text uses dimmed Fog */
.tagline {
    color: rgba(201, 209, 217, 0.72);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Command uses Mono font, Signal for interactive affordance */
.command {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 2rem;
    color: #d97706;
    margin: 2rem 0;
    padding: 1rem 2rem;
    border: 1px solid rgba(201, 209, 217, 0.12);
    display: inline-block;
}

/* Secondary text */
.hint {
    color: rgba(201, 209, 217, 0.72);
    font-size: 0.9rem;
    margin-top: 2rem;
}

/* Code blocks */
code, pre {
    font-family: 'IBM Plex Mono', monospace;
    background: #0e1b2a;
    color: #c9d1d9;
}

/* Subtle animation */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.command::after {
    content: '_';
    animation: blink 1s step-end infinite;
}

/* Manifesto - quiet declaration, IBM Plex Mono */
.manifesto {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.25em;
    color: rgba(201, 209, 217, 0.72);
    margin-top: 4rem;
    text-transform: uppercase;
}

/* Footer - sticky at bottom, allows content to push it down */
.footer {
    margin-top: auto;
    padding-top: 2rem;
    padding-bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: rgba(201, 209, 217, 0.48);
}

.copyright {
    letter-spacing: 0.05em;
}

.github-link {
    color: rgba(201, 209, 217, 0.60); /* WCAG AA: 4.95:1 contrast */
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: color 0.2s ease;
}

.github-link:hover {
    color: #8a86b8; /* Lighter iris for WCAG AA: 5.45:1 contrast */
}

/* Mobile responsiveness - scale typography for smaller viewports */
@media (max-width: 600px) {
    body {
        padding: 1.5rem;
    }

    .logomark {
        width: 150px;
        height: 150px;
        margin-bottom: 1.5rem;
    }

    h1 {
        font-size: 2rem;
        letter-spacing: 0.08em;
    }

    .tagline {
        font-size: 0.95rem;
        margin-bottom: 2rem;
    }

    .command {
        font-size: 1.25rem;
        padding: 0.75rem 1rem;
        margin: 1.5rem 0;
        max-width: 100%;
    }

    .hint {
        font-size: 0.85rem;
        margin-top: 1.5rem;
    }

    .manifesto {
        font-size: 0.75rem;
        letter-spacing: 0.2em;
        margin-top: 3rem;
    }

    .footer {
        font-size: 0.7rem;
        padding-top: 1.5rem;
    }
}

/* Extra small screens */
@media (max-width: 400px) {
    body {
        padding: 1rem;
    }

    .logomark {
        width: 120px;
        height: 120px;
        margin-bottom: 1rem;
    }

    h1 {
        font-size: 1.6rem;
    }

    .command {
        font-size: 1rem;
        padding: 0.5rem 0.75rem;
    }

    .manifesto {
        font-size: 0.65rem;
        letter-spacing: 0.15em;
    }
}