:root {
    --bg-deep: #0a0a0f;
    --bg-card: rgba(255, 255, 255, 0.03);
    --glass: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f4f4f5;
    --text-secondary: rgba(244, 244, 245, 0.6);
    --text-muted: rgba(244, 244, 245, 0.4);
    --accent: #d4a853;
    --accent-glow: rgba(212, 168, 83, 0.3);
    --accent-subtle: rgba(212, 168, 83, 0.15);
}

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

html {
    font-size: 16px;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background layers */
.bg-container {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.bg-image {
    position: absolute;
    inset: 0;
    background: url('/static/images/nasa-rTZW4f02zY8-unsplash.jpg') center/cover no-repeat;
    filter: brightness(0.7) saturate(0.8);
}

.bg-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 100% 80% at 10% 50%, rgba(212, 168, 83, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 80% 60% at 90% 30%, rgba(100, 70, 140, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 120% 100% at 50% 100%, rgba(30, 40, 80, 0.3) 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 30% 70%, rgba(180, 120, 60, 0.08) 0%, transparent 50%),
        linear-gradient(160deg, rgba(13, 13, 20, 0.85) 0%, rgba(10, 10, 15, 0.85) 40%, rgba(15, 10, 18, 0.85) 100%);
}

.bg-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

/* Floating particles */
.particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0;
    animation: float-up 8s infinite;
}

@keyframes float-up {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-100px) scale(1);
    }
}

/* Blog layout */
.blog-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding: 2rem;
}

.blog-wrapper {
    max-width: 720px;
    margin: 0 auto;
    padding-top: 2rem;
}

/* Header */
.blog-header {
    margin-bottom: 3rem;
}

.home-link {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Consolas', monospace;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.home-link:hover {
    color: var(--accent);
}

/* Article */
.blog-article {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 3rem;
    margin-bottom: 2rem;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.blog-tag {
    display: inline-block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.6rem;
    border-radius: 0.25rem;
    background: rgba(184, 138, 124, 0.2);
    color: #b88a7c;
}

.blog-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.blog-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

/* Blog content styling */
.blog-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.blog-content p {
    margin-bottom: 1.5rem;
}

.blog-content p:last-child {
    margin-bottom: 0;
}

.blog-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-subtle);
    transition: border-color 0.2s ease;
}

.blog-content a:hover {
    border-color: var(--accent);
}

.blog-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-primary);
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.25rem;
    line-height: 1.6;
}

.blog-content ul, .blog-content ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.blog-content li {
    margin-bottom: 0.75rem;
}

.blog-content h3 {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2.5rem 0 1.25rem;
    letter-spacing: -0.01em;
    border-bottom: 1px solid var(--accent-subtle);
    padding-bottom: 0.5rem;
}

.blog-content h3:first-child {
    margin-top: 0;
}

.blog-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.blog-content em {
    font-style: italic;
}

.blog-content img {
    max-width: 100%;
    height: auto;
}

/* Code blocks */
.blog-content pre {
    background: linear-gradient(145deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3));
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--accent);
    border-radius: 0.5rem;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    position: relative;
}

.blog-content pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent 50%);
}

.blog-content code {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: #e8dcc4;
}

.blog-content pre code {
    display: block;
    white-space: pre;
    word-wrap: normal;
}

/* Inline code */
.blog-content p code,
.blog-content li code {
    background: rgba(212, 168, 83, 0.1);
    border: 1px solid rgba(212, 168, 83, 0.2);
    border-radius: 0.25rem;
    padding: 0.15rem 0.4rem;
    font-size: 0.85em;
    color: var(--accent);
}

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
    margin-top: 3rem;
}

.back-link:hover {
    color: var(--accent);
}

.back-link svg {
    transition: transform 0.2s ease;
}

.back-link:hover svg {
    transform: translateX(-3px);
}

/* Substack link */
.substack-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
    margin-top: 1rem;
}

.substack-link:hover {
    color: var(--accent);
}

/* Email signup card */
.signup-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 2rem;
    margin-top: 2rem;
}

.signup-header {
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.signup-subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.email-form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    padding: 0.5rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.email-form:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.email-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.email-input {
    width: 100%;
    background: transparent;
    border: none;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
}

.email-input::placeholder {
    color: var(--text-muted);
}

.cursor-blink {
    position: absolute;
    left: 1rem;
    width: 2px;
    height: 1.2rem;
    background: var(--accent);
    animation: blink 1s step-end infinite;
    opacity: 1;
    transition: opacity 0.2s;
    pointer-events: none;
}

.email-input:focus + .cursor-blink,
.email-input:not(:placeholder-shown) + .cursor-blink {
    opacity: 0;
}

@keyframes blink {
    50% { opacity: 0; }
}

.submit-btn {
    background: var(--accent);
    color: var(--bg-deep);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.35rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.submit-btn:hover {
    background: #e4b863;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* Responsive */
@media (max-width: 600px) {
    .blog-container {
        padding: 1.5rem;
    }

    .blog-article {
        padding: 2rem 1.5rem;
    }

    .blog-content {
        font-size: 1rem;
    }

    .blog-content blockquote {
        font-size: 1.1rem;
        padding-left: 1rem;
    }

    .email-form {
        flex-direction: column;
        padding: 0.75rem;
    }

    .email-input-wrapper {
        width: 100%;
    }

    .submit-btn {
        width: 100%;
    }
}