/* Reset & base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html,
body,
#root {
    height: 100%;
}
body {
    font-family:
        Inter,
        system-ui,
        -apple-system,
        "Segoe UI",
        Roboto,
        "Helvetica Neue",
        Arial;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

/* Theme variables on html[data-theme] */
html[data-theme="dark"] {
    --bg: #0a0a0a;
    --surface: #111111;
    --border: #1a2e1a;
    --primary: #00ff41;
    --primary-2: #00cc33;
    --dim: #004d14;
    --text: #e0ffe0;
    --muted: #5a8a5a;
}
html[data-theme="light"] {
    --bg: #f0fff0;
    --surface: #ffffff;
    --border: #b3d9b3;
    --primary: #006600;
    --primary-2: #008800;
    --dim: #cfe6cf;
    --text: #0a1a0a;
    --muted: #4a7a4a;
}

body {
    background: var(--bg);
    color: var(--text);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    backdrop-filter: blur(6px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
    z-index: 50;
}
.nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}
.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.logo {
    width: 150px;
}
.title {
    font-weight: 600;
    font-family:
        JetBrains Mono,
        monospace;
}
.nav a {
    color: var(--muted);
    margin-left: 1rem;
    text-decoration: none;
}
.nav a.cta {
    border: 1px solid var(--primary);
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    color: var(--primary);
}
.theme-toggle {
    margin-left: 0.8rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--primary);
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    cursor: pointer;
}

/* Hero */
.hero {
    min-height: 65vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 4rem 0;
}
.hero-inner {
    max-width: 760px;
}
.hero-title {
    font-family:
        JetBrains Mono,
        monospace;
    font-size: 2.4rem;
    color: var(--primary);
    margin-bottom: 0.6rem;
}
.hero-sub {
    color: var(--muted);
    margin-bottom: 1rem;
}
.hero-actions {
    display: flex;
    gap: 0.8rem;
    margin-bottom: 1rem;
}
.btn {
    display: inline-block;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--primary);
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
}
.btn.primary {
    background: transparent;
}
.btn.ghost {
    border-color: transparent;
    color: var(--muted);
}
.btn.primary:hover {
    background: var(--primary);
    color: #052005;
}

.ascii {
    margin-top: 1rem;
    color: var(--muted);
    background: transparent;
    font-family:
        JetBrains Mono,
        monospace;
}

.scanlines {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(0, 0, 0, 0.06) 50%, transparent 50%);
    background-size: 100% 4px;
    mix-blend-mode: overlay;
}

/* Sections */
.section {
    padding: 3rem 0;
}
.section h2 {
    font-family:
        JetBrains Mono,
        monospace;
    color: var(--primary);
    margin-bottom: 1rem;
}
.section p {
    color: var(--muted);
    margin-bottom: 1rem;
}

/* Activities grid */
.grid {
    display: grid;
    gap: 1rem;
}
.activities {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.card {
    background: var(--surface);
    border-left: 4px solid var(--primary-2);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.3);
}
.card h3 {
    margin-top: 0.6rem;
    margin-bottom: 0.4rem;
    font-family:
        JetBrains Mono,
        monospace;
}
.card p {
    color: var(--muted);
    font-size: 0.95rem;
}
.icon {
    font-family:
        JetBrains Mono,
        monospace;
    color: var(--primary);
}
.card:hover {
    transform: translateY(-6px);
    transition:
        transform 180ms,
        box-shadow 180ms;
    box-shadow: 0 8px 30px rgba(0, 255, 65, 0.06);
}

/* Projects */
.projects {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    margin-top: 1rem;
}
.project {
    background: var(--surface);
    padding: 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    color: var(--text);
}

/* Form */
.form-section .join-form {
    display: grid;
    gap: 0.8rem;
    max-width: 600px;
}
.join-form label {
    display: flex;
    flex-direction: column;
    color: var(--muted);
    font-size: 0.95rem;
}
.join-form input,
.join-form textarea {
    margin-top: 0.4rem;
    padding: 0.6rem;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    border-radius: 6px;
}
.form-msg {
    margin-top: 0.6rem;
    color: var(--primary);
}

/* Contact / Signal CTA */
.contact-section .center {
    display: flex;
    justify-content: center;
    margin: 1.2rem 0;
}
.signal-cta {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    width: 180px;
    height: 180px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
}
.signal-cta svg {
    width: 70px;
    height: 70px;
    fill: var(--primary);
    stroke: var(--primary);
}
.signal-cta .label {
    font-family:
        JetBrains Mono,
        monospace;
    color: var(--primary);
    font-size: 0.95rem;
}
.signal-cta:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 40px rgba(0, 255, 65, 0.08);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 1.2rem 0;
    margin-top: 2rem;
}
.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted);
}
.footer-row .links a {
    margin-left: 1rem;
    color: var(--muted);
    text-decoration: none;
}

/* Edit link in footer */
.edit-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
    padding: 0.35rem 0.6rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--muted);
    text-decoration: none;
}
.edit-link svg {
    width: 16px;
    height: 16px;
    fill: var(--primary);
    opacity: 0.95;
}
.edit-link:hover {
    color: var(--primary);
    box-shadow: 0 8px 30px rgba(0, 255, 65, 0.06);
    border-color: var(--primary);
}

/* Responsive */
@media (max-width: 720px) {
    .nav a {
        display: none;
    }
    .hero-title {
        font-size: 1.6rem;
    }
    .container {
        padding: 1rem;
    }
}

/* Minor accessibility focus */
button:focus,
a:focus,
input:focus,
textarea:focus {
    outline: 2px dashed var(--primary);
    outline-offset: 3px;
}