/* ========== Theme tokens ========== */
:root,
:root[data-theme="dark"] {
    --bg: #06070a;
    --bg-elev: #0e1018;
    --bg-card: #11141c;
    --bg-card-hover: #161a24;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #e6e8ee;
    --text-strong: #ffffff;
    --text-muted: #6e7280;
    --text-faint: #3e4250;
    --accent: #ff2030;
    --accent-hover: #ff4858;
    --accent-glow: 0 0 32px rgba(255, 32, 48, 0.35);
    --accent-soft: rgba(255, 32, 48, 0.12);
    --secondary: #00d4ff;
    --secondary-glow: 0 0 24px rgba(0, 212, 255, 0.28);
    --grid: rgba(255, 255, 255, 0.025);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border) inset;
    --gradient-accent: linear-gradient(135deg, #ff2030 0%, #ff5070 50%, #ff8030 100%);
    --gradient-soft: radial-gradient(circle at 30% 20%, rgba(255, 32, 48, 0.18), transparent 50%),
                     radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.12), transparent 50%);
    color-scheme: dark;
}

:root[data-theme="light"] {
    --bg: #f4f6fb;
    --bg-elev: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fd;
    --border: rgba(13, 17, 28, 0.08);
    --border-strong: rgba(13, 17, 28, 0.16);
    --text: #0e1018;
    --text-strong: #000000;
    --text-muted: #5a606e;
    --text-faint: #9aa0ae;
    --accent: #d4202c;
    --accent-hover: #ff3040;
    --accent-glow: 0 0 24px rgba(212, 32, 44, 0.25);
    --accent-soft: rgba(212, 32, 44, 0.08);
    --secondary: #007fa3;
    --secondary-glow: 0 0 18px rgba(0, 127, 163, 0.2);
    --grid: rgba(13, 17, 28, 0.04);
    --shadow-card: 0 4px 18px rgba(13, 17, 28, 0.06), 0 0 0 1px var(--border) inset;
    --gradient-accent: linear-gradient(135deg, #d4202c 0%, #ff5070 50%, #ff7030 100%);
    --gradient-soft: radial-gradient(circle at 30% 20%, rgba(212, 32, 44, 0.06), transparent 55%),
                     radial-gradient(circle at 80% 70%, rgba(0, 127, 163, 0.06), transparent 55%);
    color-scheme: light;
}

/* ========== Reset / base ========== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    background-image:
        var(--gradient-soft),
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 100% 100%, 48px 48px, 48px 48px;
    background-attachment: fixed;
}
main { flex: 1; }
a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
code { font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace; font-size: 0.9em; background: var(--accent-soft); color: var(--accent); padding: 2px 6px; border-radius: 4px; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* ========== Typography ========== */
h1, h2, h3, h4 {
    font-family: "Orbitron", "Space Grotesk", sans-serif;
    font-weight: 700;
    color: var(--text-strong);
    letter-spacing: -0.5px;
    margin: 0 0 16px;
    line-height: 1.1;
}
h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 0 24px rgba(255, 32, 48, 0.25));
    letter-spacing: -1px;
}
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: 1.25rem; letter-spacing: 0; }
p { color: var(--text-muted); margin: 0 0 16px; }
.eyebrow {
    color: var(--secondary);
    letter-spacing: 3px;
    text-transform: uppercase;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 20px;
    font-family: "JetBrains Mono", monospace;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.eyebrow::before {
    content: "";
    width: 24px;
    height: 1px;
    background: var(--secondary);
    box-shadow: var(--secondary-glow);
}

/* ========== Header ========== */
.site-header {
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 80%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    position: sticky;
    top: 0;
    z-index: 50;
}
.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    gap: 24px;
}
.brand {
    font-family: "Orbitron", sans-serif;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 4px;
    text-transform: uppercase;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: none;
}
.brand:hover { filter: brightness(1.2); }
.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a {
    color: var(--text);
    font-weight: 500;
    font-size: 14px;
    font-family: "Space Grotesk", sans-serif;
    transition: color 0.15s;
}
.site-nav a:hover { color: var(--accent); }
.user-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 14px 4px 4px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 999px;
}
.user-pill img { width: 28px; height: 28px; border-radius: 50%; }
.inline-form { display: inline; }

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 999px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    font-size: 16px;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); box-shadow: var(--accent-glow); }

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: "Space Grotesk", sans-serif;
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(255, 32, 48, 0.5); color: #fff; }
.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--accent-glow); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 0; padding: 8px 14px; }
.btn-ghost:hover { color: var(--accent); }
.btn-large { padding: 16px 32px; font-size: 14px; letter-spacing: 2px; }

/* ========== Hero ========== */
.hero { padding: 120px 0 96px; text-align: center; position: relative; }
.hero::before {
    content: "";
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(255, 32, 48, 0.15) 0%, transparent 65%);
    pointer-events: none;
    z-index: -1;
}
.hero .eyebrow { margin-bottom: 28px; }
.hero p.lead {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    align-items: center;
}
.beta-input {
    background: var(--bg-elev);
    border: 1px solid var(--border-strong);
    color: var(--text);
    padding: 14px 18px;
    border-radius: 8px;
    min-width: 240px;
    font-family: "JetBrains Mono", monospace;
    font-size: 13px;
    transition: all 0.15s;
}
.beta-input:focus { outline: none; border-color: var(--accent); box-shadow: var(--accent-glow); }
.beta-input::placeholder { color: var(--text-faint); }
.hero-img {
    margin-top: 80px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 16px;
    box-shadow: 0 40px 100px rgba(255, 32, 48, 0.15), 0 0 0 1px var(--border-strong);
    overflow: hidden;
    transform: perspective(1200px) rotateX(2deg);
}

/* ========== Sections ========== */
.section { padding: 96px 0; border-top: 1px solid var(--border); position: relative; }
.section-center { text-align: center; }
.section-split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.section-split img { border-radius: 16px; border: 1px solid var(--border-strong); }
@@media (max-width: 880px) { .section-split { grid-template-columns: 1fr; gap: 48px; } }

/* ========== Module grid ========== */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 56px;
}
.module-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 32px 28px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.module-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.2s;
    border-radius: inherit;
    z-index: -1;
}
.module-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(255, 32, 48, 0.15);
}
.module-card .icon {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 16px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: var(--accent-soft);
    border-radius: 12px;
    width: 56px;
    height: 56px;
    text-align: center;
}
.module-card h3 { margin-bottom: 10px; }
.module-card p { margin: 0; font-size: 14px; color: var(--text-muted); }

/* ========== CTA band ========== */
.cta-band {
    padding: 96px 0;
    text-align: center;
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.cta-band::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--gradient-soft);
    pointer-events: none;
    z-index: -1;
}

/* ========== Forms ========== */
.form-row { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.form-row label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: "JetBrains Mono", monospace;
}
.form-row input[type=text], .form-row input[type=number], .form-row input[type=url],
.form-row input[type=email], .form-row select, .form-row textarea {
    background: var(--bg-elev);
    border: 1px solid var(--border-strong);
    color: var(--text);
    padding: 11px 14px;
    border-radius: 8px;
    font-family: "Space Grotesk", sans-serif;
    font-size: 14px;
    transition: all 0.15s;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-help { font-size: 12px; color: var(--text-muted); margin: -4px 0 8px; }

/* ========== Footer ========== */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 40px;
    text-align: center;
    color: var(--text-faint);
    font-size: 12px;
    font-family: "JetBrains Mono", monospace;
    letter-spacing: 1px;
}
.footer-tribute {
    max-width: 720px;
    margin: 0 auto 24px;
    font-family: "Space Grotesk", sans-serif;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
    letter-spacing: 0;
    font-style: italic;
}

/* ========== Alerts ========== */
.alert {
    padding: 14px 18px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    border: 1px solid;
}
.alert-success {
    background: rgba(0, 220, 130, 0.08);
    color: #20e090;
    border-color: rgba(0, 220, 130, 0.3);
}
.alert-error {
    background: rgba(255, 32, 48, 0.08);
    color: var(--accent);
    border-color: rgba(255, 32, 48, 0.3);
}

/* ========== Responsive ========== */
@@media (max-width: 720px) {
    .hero { padding: 80px 0 64px; }
    .section { padding: 64px 0; }
    .header-row { padding: 12px 16px; }
    .site-nav { gap: 14px; }
    .site-nav a:not(.btn) { display: none; }
}