/* Monopole AI — Dark gradient + glassmorphism */

:root {
    --c-bg: #0a0a1a;
    --c-panel: #111128;
    --c-card: #1e1b4b;
    --c-accent: #818cf8;
    --c-accent-2: #a78bfa;
    --c-link: #6366f1;
    --c-text: #e0e7ff;
    --c-text-soft: rgba(224, 231, 255, 0.72);
    --c-text-mute: rgba(224, 231, 255, 0.5);
    --c-border: rgba(129, 140, 248, 0.15);
    --c-border-soft: rgba(99, 102, 241, 0.1);

    --radius: 16px;
    --radius-sm: 10px;
    --shadow-glow: 0 30px 80px -30px rgba(99, 102, 241, 0.45);
    --max-w: 1200px;
    --header-h: 72px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Animated dark gradient sitting behind everything */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background: linear-gradient(135deg, #0a0a1a, #1e1b4b, #0a0a1a);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(800px 500px at 80% 10%, rgba(167, 139, 250, 0.18), transparent 60%),
        radial-gradient(700px 500px at 10% 90%, rgba(99, 102, 241, 0.16), transparent 60%);
    pointer-events: none;
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

a { color: var(--c-text); text-decoration: none; }

h1, h2, h3, h4 {
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
    font-weight: 700;
    color: var(--c-text);
    letter-spacing: -0.01em;
    margin: 0 0 0.6em;
    line-height: 1.15;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); letter-spacing: -0.015em; }
h3 { font-size: 1.15rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin: 0 0 1em; color: var(--c-text-soft); }

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    height: var(--header-h);
    transform: translateY(-110%);
    transition: transform 0.45s cubic-bezier(.2,.8,.2,1), background 0.4s ease, border-color 0.4s ease;
    background: transparent;
    border-bottom: 1px solid transparent;
}

.site-header.is-visible {
    transform: translateY(0);
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--c-border-soft);
}

.header-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    height: 100%;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--c-text);
    font-weight: 700;
    letter-spacing: -0.01em;
    font-size: 1.05rem;
}

.brand-mark {
    display: inline-flex;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
}

.brand-name { white-space: nowrap; }

.brand-accent {
    background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-left: 2px;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 0.95rem;
}

.primary-nav a {
    color: var(--c-text-soft);
    transition: color 0.2s ease;
}

.primary-nav a:hover { color: var(--c-text); }

.primary-nav .nav-cta {
    color: var(--c-text);
    background: linear-gradient(135deg, var(--c-link), var(--c-accent-2));
    padding: 8px 18px;
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.primary-nav .nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.7);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 32px 120px;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(129, 140, 248, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(129, 140, 248, 0.07) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    pointer-events: none;
    will-change: transform;
}

.orb-a {
    top: -80px;
    left: -80px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.6), transparent 70%);
    animation: orbDrift 18s ease-in-out infinite;
}

.orb-b {
    bottom: -120px;
    right: -120px;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.55), transparent 70%);
    animation: orbDrift 22s ease-in-out infinite reverse;
}

@keyframes orbDrift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%      { transform: translate(40px, 30px) scale(1.08); }
}

.hero-panel {
    position: relative;
    max-width: 880px;
    width: 100%;
    padding: 56px clamp(28px, 4vw, 56px);
    text-align: center;
    z-index: 1;
}

.eyebrow {
    display: inline-block;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-accent);
    padding: 6px 14px;
    border: 1px solid var(--c-border);
    border-radius: 999px;
    background: rgba(129, 140, 248, 0.08);
    margin-bottom: 24px;
}

.hero-title {
    margin-bottom: 20px;
    background: linear-gradient(180deg, #ffffff 0%, #c7d2fe 60%, #a78bfa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-sub {
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto 36px;
    color: var(--c-text-soft);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
    margin-bottom: 40px;
}

.hero-meta {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    font-size: 0.85rem;
    color: var(--c-text-mute);
    font-family: "Fira Code", ui-monospace, monospace;
    letter-spacing: 0.04em;
}

.hero-meta li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.hero-meta .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-accent);
    box-shadow: 0 0 10px var(--c-accent);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--c-link), var(--c-accent-2));
    color: #ffffff;
    box-shadow: 0 12px 30px -12px rgba(99, 102, 241, 0.7);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 40px -12px rgba(99, 102, 241, 0.85);
}

.btn-ghost {
    background: rgba(224, 231, 255, 0.04);
    color: var(--c-text);
    border-color: var(--c-border);
}

.btn-ghost:hover {
    background: rgba(129, 140, 248, 0.12);
    border-color: rgba(129, 140, 248, 0.4);
}

.btn-sm {
    padding: 11px 20px;
    font-size: 0.88rem;
}

/* ---------- Glass panels ---------- */
.glass-panel {
    background: rgba(30, 27, 75, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-glow);
}

/* ---------- Accent separator line ---------- */
.accent-line {
    height: 2px;
    width: min(100%, var(--max-w));
    margin: 0 auto;
    background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2), transparent);
    opacity: 0.6;
}

/* ---------- Feature sections ---------- */
.feature-section {
    padding: 100px 32px;
}

.feature-row {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: center;
}

.feature-section.reverse .feature-row > .feature-text { order: 2; }
.feature-section.reverse .feature-row > .feature-visual { order: 1; }

.section-eyebrow {
    display: inline-block;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: 18px;
}

.section-eyebrow.center { display: block; text-align: center; }

.feature-text h2 { margin-bottom: 16px; }

.feature-text p {
    font-size: 1.05rem;
    max-width: 520px;
}

.feature-list {
    list-style: none;
    margin: 24px 0 0;
    padding: 0;
}

.feature-list li {
    position: relative;
    padding: 10px 0 10px 28px;
    color: var(--c-text-soft);
    border-bottom: 1px solid var(--c-border-soft);
}

.feature-list li:last-child { border-bottom: none; }

.feature-list li::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    transform: translateY(-50%);
    background: radial-gradient(circle, var(--c-accent) 30%, transparent 70%);
    box-shadow: 0 0 10px rgba(129, 140, 248, 0.6);
}

/* ---------- Visual cards ---------- */
.visual-card {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    padding: 32px;
    isolation: isolate;
}

.visual-fill {
    position: absolute;
    inset: 0;
    z-index: -1;
    opacity: 0.85;
}

.fill-a {
    background:
        radial-gradient(circle at 20% 20%, rgba(167, 139, 250, 0.55), transparent 55%),
        radial-gradient(circle at 80% 70%, rgba(99, 102, 241, 0.5), transparent 55%),
        linear-gradient(135deg, #1e1b4b, #111128);
}

.fill-b {
    background:
        radial-gradient(circle at 50% 50%, rgba(129, 140, 248, 0.55), transparent 60%),
        linear-gradient(135deg, #0a0a1a, #1e1b4b);
}

.fill-c {
    background:
        radial-gradient(circle at 80% 20%, rgba(167, 139, 250, 0.5), transparent 55%),
        radial-gradient(circle at 30% 80%, rgba(99, 102, 241, 0.45), transparent 55%),
        linear-gradient(135deg, #111128, #1e1b4b);
}

.visual-overlay {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
}

.visual-row {
    display: flex;
    justify-content: space-between;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.85rem;
    color: var(--c-text);
    padding: 8px 14px;
    background: rgba(10, 10, 26, 0.5);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
}

.vlabel { color: var(--c-text-mute); }
.vvalue { color: var(--c-accent); }

.visual-bar {
    height: 8px;
    background: rgba(10, 10, 26, 0.5);
    border-radius: 4px;
    border: 1px solid var(--c-border);
    overflow: hidden;
}

.visual-bar span {
    display: block;
    height: 100%;
    width: var(--w, 50%);
    background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2));
    border-radius: 4px;
}

.visual-caption {
    margin-top: auto;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-text-mute);
    text-align: center;
}

/* Concentric monopole rings visual */
.ring-stack {
    position: relative;
    width: 220px;
    height: 220px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring-stack .ring,
.ring-stack .ring-core {
    position: absolute;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ring-stack .ring {
    border: 1px solid rgba(129, 140, 248, 0.4);
    animation: ringPulse 4s ease-in-out infinite;
}

.ring-stack .r1 { width: 80px; height: 80px; }
.ring-stack .r2 { width: 140px; height: 140px; animation-delay: 0.6s; }
.ring-stack .r3 { width: 200px; height: 200px; animation-delay: 1.2s; }

.ring-core {
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, var(--c-accent-2), var(--c-accent));
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.7);
}

@keyframes ringPulse {
    0%, 100% { opacity: 0.4; transform: translate(-50%, -50%) scale(1); }
    50%      { opacity: 0.85; transform: translate(-50%, -50%) scale(1.06); }
}

/* Paper cards */
.paper-card {
    padding: 16px 18px;
    background: rgba(10, 10, 26, 0.55);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
}

.paper-card + .paper-card { margin-top: 14px; }

.paper-tag {
    display: inline-block;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    color: var(--c-accent);
    margin-bottom: 8px;
}

.paper-card h4 {
    margin: 0 0 6px;
    font-size: 0.98rem;
    line-height: 1.35;
}

.paper-authors {
    margin: 0;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.78rem;
    color: var(--c-text-mute);
}

/* Code card */
.code-card {
    padding: 0;
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(10, 10, 26, 0.6);
    border-bottom: 1px solid var(--c-border);
}

.code-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: rgba(167, 139, 250, 0.4);
}

.code-dot:nth-child(1) { background: rgba(99, 102, 241, 0.7); }
.code-dot:nth-child(2) { background: rgba(129, 140, 248, 0.7); }
.code-dot:nth-child(3) { background: rgba(167, 139, 250, 0.7); }

.code-title {
    margin-left: auto;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.78rem;
    color: var(--c-text-mute);
    letter-spacing: 0.08em;
}

.code-block {
    margin: 0;
    padding: 22px 24px;
    font-family: "Fira Code", ui-monospace, monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--c-text);
    overflow-x: auto;
    background: transparent;
}

.tk-com { color: var(--c-text-mute); font-style: italic; }
.tk-kw  { color: var(--c-accent-2); }
.tk-str { color: #c4b5fd; }
.tk-num { color: var(--c-accent); }

/* ---------- Trust section ---------- */
.trust-section {
    padding: 100px 32px 120px;
}

.trust-inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

.trust-inner h2 { margin-bottom: 56px; }
.center { text-align: center; }

.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.trust-card {
    padding: 32px 28px;
}

.trust-card h3 {
    color: var(--c-accent);
    margin-bottom: 10px;
    font-size: 1.05rem;
    letter-spacing: -0.005em;
}

.trust-card p {
    margin: 0;
    font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--c-border-soft);
    background: rgba(10, 10, 26, 0.6);
    padding: 80px 32px 28px;
}

.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.2fr;
    gap: 56px;
}

.footer-col h4 {
    margin: 0 0 18px;
    font-size: 0.82rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-accent);
}

.footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul a {
    color: var(--c-text-soft);
    transition: color 0.2s ease;
    font-size: 0.95rem;
}

.footer-col ul a:hover { color: var(--c-text); }

.brand-footer { margin-bottom: 16px; }

.footer-blurb {
    color: var(--c-text-soft);
    font-size: 0.95rem;
    margin-bottom: 18px;
    max-width: 360px;
}

.newsletter {
    display: flex;
    gap: 8px;
    align-items: stretch;
    background: rgba(10, 10, 26, 0.6);
    border: 1px solid var(--c-border);
    border-radius: 999px;
    padding: 6px;
}

.newsletter input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--c-text);
    font-family: inherit;
    font-size: 0.9rem;
    padding: 8px 14px;
}

.newsletter input::placeholder { color: var(--c-text-mute); }

.newsletter-msg {
    margin: 12px 0 0;
    min-height: 1.2em;
    font-size: 0.85rem;
    color: var(--c-accent);
    font-family: "Fira Code", ui-monospace, monospace;
}

.footer-bottom {
    max-width: var(--max-w);
    margin: 64px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--c-border-soft);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--c-text-mute);
    font-size: 0.85rem;
    font-family: "Fira Code", ui-monospace, monospace;
    letter-spacing: 0.04em;
}

.footer-links {
    display: inline-flex;
    gap: 22px;
}

.footer-links a {
    color: var(--c-text-mute);
    transition: color 0.2s ease;
}

.footer-links a:hover { color: var(--c-text); }

/* ---------- Reveal animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.9s ease, transform 0.9s cubic-bezier(.2,.8,.2,1);
}

.reveal.is-in {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
    .feature-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .feature-section.reverse .feature-row > .feature-text,
    .feature-section.reverse .feature-row > .feature-visual { order: initial; }

    .trust-grid { grid-template-columns: 1fr; }

    .footer-inner { grid-template-columns: 1fr; gap: 40px; }
    .footer-bottom { flex-direction: column; gap: 12px; }

    .primary-nav { gap: 18px; font-size: 0.88rem; }
    .primary-nav a:not(.nav-cta) { display: none; }
}

@media (max-width: 640px) {
    .hero { padding: 120px 20px 80px; }
    .hero-panel { padding: 40px 22px; }
    .feature-section { padding: 70px 20px; }
    .trust-section { padding: 70px 20px 90px; }
    .header-inner { padding: 0 20px; }
    .site-footer { padding: 64px 20px 24px; }
    .visual-card { aspect-ratio: 5 / 4; padding: 22px; }
}