:root {
    --bg: #0A101F;
    --bg-elevated: #111A2E;
    --bg-elevated-2: #152038;
    --text: #E8EDF7;
    --text-muted: #8592AC;
    --signal: #48CCFF;
    --signal-dim: rgba(72,204,255,0.18);
    --spark: #B98CFF;
    --edge: rgba(255,255,255,0.09);
    --edge-strong: rgba(255,255,255,0.16);
    --shadow: 0 20px 60px rgba(0,0,0,0.45);
    --font-display: 'Space Grotesk',sans-serif;
    --font-body: 'Inter',sans-serif;
    --font-mono: 'JetBrains Mono',monospace;
}

html[data-theme="light"] {
    --bg: #EEF3FA;
    --bg-elevated: #FFFFFF;
    --bg-elevated-2: #F4F8FD;
    --text: #111827;
    --text-muted: #5B6478;
    --signal: #0575C9;
    --signal-dim: rgba(5,117,201,0.10);
    --spark: #7C3AED;
    --edge: rgba(16,21,40,0.08);
    --edge-strong: rgba(16,21,40,0.14);
    --shadow: 0 20px 50px rgba(16,24,40,0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.4s ease;
}

a {
    color: inherit;
    text-decoration: none;
}

.wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--signal);
}

/* ---------- NAV ---------- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    background: linear-gradient(to bottom, var(--bg) 60%, transparent);
    backdrop-filter: blur(6px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 19px;
    letter-spacing: -0.01em;
}

.logo-mark {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

    .logo-mark circle {
        fill: none;
        stroke: var(--signal);
        stroke-width: 2;
    }

    .logo-mark path {
        stroke: var(--signal);
        stroke-width: 2;
        fill: none;
        stroke-linecap: round;
    }

.nav-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.theme-toggle {
    width: 52px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--edge-strong);
    background: var(--bg-elevated);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: border-color 0.3s ease, background 0.3s ease;
}

    .theme-toggle:hover {
        border-color: var(--signal);
    }

    .theme-toggle svg {
        width: 26px;
        height: 20px;
    }

    .theme-toggle .led {
        position: absolute;
        bottom: 3px;
        right: 4px;
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: #4ADE80;
        box-shadow: 0 0 6px 1px #4ADE80;
    }

html[data-theme="light"] .theme-toggle .led {
    background: #FBBF24;
    box-shadow: 0 0 6px 1px #FBBF24;
}

.btn {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 14px;
    padding: 9px 18px;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--signal);
    color: #04101E;
}

    .btn-primary:hover {
        filter: brightness(1.1);
        box-shadow: 0 0 22px var(--signal-dim);
    }

.btn-ghost {
    background: transparent;
    border-color: var(--edge-strong);
    color: var(--text);
}

    .btn-ghost:hover {
        border-color: var(--signal);
        color: var(--signal);
    }

/* ---------- HERO ---------- */
.hero {
    position: relative;
    padding: 140px 24px 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

.hero-flash {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 18%, rgba(72,204,255,0.35), transparent 55%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

    .hero-flash.strike {
        opacity: 1;
        transition: opacity 0.05s ease;
    }

.hero h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(34px,6vw,64px);
    letter-spacing: -0.02em;
    line-height: 1.05;
    max-width: 820px;
    margin: 20px 0 16px;
}

    .hero h1 span {
        color: var(--signal);
    }

.hero p {
    max-width: 520px;
    color: var(--text-muted);
    font-size: clamp(15px,2vw,18px);
    margin-bottom: 30px;
}

.hero-ctas {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 56px;
}

.hero-stage {
    width: 100%;
    max-width: 820px;
    position: relative;
}

    .hero-stage svg {
        width: 100%;
        height: auto;
        overflow: visible;
    }

/* cloud */
.cloud-group {
    cursor: pointer;
}

.cloud-body {
    fill: var(--bg-elevated-2);
    stroke: var(--edge-strong);
    stroke-width: 1.5;
    transition: filter 0.25s ease, stroke 0.25s ease;
}

.cloud-group:hover .cloud-body {
    stroke: var(--signal);
    stroke-width: 2;
    filter: drop-shadow(0 0 12px var(--signal-dim));
}

.cloud-group {
    animation: bob 5s ease-in-out infinite;
}

@keyframes bob {
    0%,100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

.cloud-group.shake {
    animation: bob 5s ease-in-out infinite, shake 0.4s ease;
}

@keyframes shake {
    0%,100% {
        transform: translateX(0);
    }

    20% {
        transform: translateX(-4px);
    }

    40% {
        transform: translateX(4px);
    }

    60% {
        transform: translateX(-2px);
    }

    80% {
        transform: translateX(2px);
    }
}

.bolt {
    fill: none;
    stroke: var(--spark);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0;
    filter: drop-shadow(0 0 6px var(--spark));
}

    .bolt.strike {
        animation: boltflash 0.4s ease;
    }

@keyframes boltflash {
    0% {
        opacity: 0;
    }

    15% {
        opacity: 1;
    }

    30% {
        opacity: 0.2;
    }

    45% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

/* beams + packets */
.beam {
    fill: none;
    stroke: var(--signal);
    stroke-width: 1.5;
    stroke-dasharray: 4 6;
    opacity: 0.45;
}

.packet {
    fill: var(--signal);
    filter: drop-shadow(0 0 4px var(--signal));
}

/* device screens in hero */
.device {
    transition: filter 0.3s ease;
    transform-origin: center bottom;
}

    .device:hover {
        filter: brightness(1.15);
    }

.device-shell {
    fill: var(--bg-elevated);
    stroke: var(--edge-strong);
    stroke-width: 1.5;
}

.device-screen {
    fill: var(--bg);
    transition: fill 0.3s ease;
}

.device:hover .device-screen {
    fill: var(--signal-dim);
}

.device-glow {
    fill: var(--signal);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.device:hover .device-glow {
    opacity: 0.55;
}

.device-letter {
    font-family: var(--font-display);
    font-weight: 700;
    text-anchor: middle;
    fill: var(--signal);
    opacity: 0;
    transition: opacity 0.35s ease, filter 0.35s ease;
    filter: drop-shadow(0 0 0px var(--signal));
    pointer-events: none;
}

.device:hover .device-letter {
    opacity: 1;
    filter: drop-shadow(0 0 8px var(--signal));
}

.scroll-cue {
    margin-top: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

    .scroll-cue .stick {
        width: 1px;
        height: 30px;
        background: linear-gradient(to bottom, var(--signal), transparent);
        animation: pulse-line 1.6s ease-in-out infinite;
    }

@keyframes pulse-line {
    0%,100% {
        opacity: 0.3;
    }

    50% {
        opacity: 1;
    }
}

/* ---------- FLOW SECTION ---------- */
.flow-section {
    position: relative;
    padding: 60px 24px 100px;
}

.flow-header {
    max-width: 560px;
    margin: 0 auto 70px;
    text-align: center;
}

    .flow-header h2 {
        font-family: var(--font-display);
        font-weight: 700;
        font-size: clamp(26px,4vw,38px);
        letter-spacing: -0.01em;
        margin-top: 10px;
    }

    .flow-header p {
        color: var(--text-muted);
        margin-top: 12px;
        font-size: 15.5px;
    }

.trunk-wrap {
    position: relative;
    max-width: 760px;
    margin: 0 auto;
}

.trunk-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
    background: var(--edge);
}

.trunk-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(to bottom, var(--signal), var(--spark));
    box-shadow: 0 0 10px var(--signal);
    transition: height 0.1s linear;
}

.flow-stop {
    position: relative;
    display: flex;
    align-items: center;
    gap: 36px;
    padding: 56px 0;
    opacity: 0;
    transform: translateY(-38px) rotate(-3deg);
    transition: opacity 0.7s cubic-bezier(.2,.8,.3,1.2), transform 0.7s cubic-bezier(.2,.8,.3,1.2);
}

    .flow-stop.in-view {
        opacity: 1;
        transform: translateY(0) rotate(0deg);
    }

    .flow-stop:nth-child(even) {
        flex-direction: row-reverse;
    }

    .flow-stop .node {
        position: relative;
        width: 78px;
        height: 78px;
        flex-shrink: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 2;
    }

    .flow-stop .node-bg {
        position: absolute;
        inset: 0;
        background: var(--bg-elevated);
        border: 1px solid var(--edge-strong);
        border-radius: 16px;
        transition: box-shadow 0.3s ease, border-color 0.3s ease;
    }

    .flow-stop .node:hover .node-bg {
        box-shadow: 0 0 26px var(--signal-dim);
        border-color: var(--signal);
    }

    .flow-stop .node svg {
        width: 36px;
        height: 36px;
        position: relative;
        z-index: 1;
        transition: filter 0.3s ease;
    }

    .flow-stop .node:hover svg {
        filter: drop-shadow(0 0 6px var(--signal));
    }

.flow-icon-shell {
    fill: none;
    stroke: var(--text-muted);
    stroke-width: 1.6;
}

.flow-stop .node:hover .flow-icon-shell {
    stroke: var(--signal);
}

.flow-icon-screen {
    fill: var(--bg);
    transition: fill 0.3s ease;
}

.flow-stop .node:hover .flow-icon-screen {
    fill: var(--signal-dim);
}

.flow-dot {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transform: translate(-50%,-50%);
    background: var(--bg);
    border: 2px solid var(--edge-strong);
    z-index: 1;
}

.flow-stop.in-view .flow-dot {
    border-color: var(--signal);
    box-shadow: 0 0 10px var(--signal);
}

.flow-copy {
    max-width: 300px;
}

.flow-stop:nth-child(even) .flow-copy {
    text-align: right;
}

.flow-copy .tag {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--signal);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.flow-copy h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin: 8px 0 8px;
}

.flow-copy p {
    color: var(--text-muted);
    font-size: 14.5px;
}

/* ---------- CAPABILITIES ---------- */
.capabilities {
    padding: 40px 24px 110px;
}

.cap-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 22px;
}

.cap-card {
    background: var(--bg-elevated);
    border: 1px solid var(--edge);
    border-radius: 16px;
    padding: 28px 24px;
    transition: border-color 0.3s ease, transform 0.3s ease;
}

    .cap-card:hover {
        border-color: var(--signal);
        transform: translateY(-4px);
    }

    .cap-card .num {
        font-family: var(--font-mono);
        font-size: 12px;
        color: var(--signal);
    }

    .cap-card h3 {
        font-family: var(--font-display);
        font-size: 18px;
        margin: 12px 0 8px;
    }

    .cap-card p {
        color: var(--text-muted);
        font-size: 14px;
    }

/* ---------- CTA FOOTER ---------- */
.cta-band {
    margin: 0 24px 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--edge);
    border-radius: 20px;
    padding: 60px 24px;
    text-align: center;
}

    .cta-band h2 {
        font-family: var(--font-display);
        font-size: clamp(24px,4vw,34px);
        margin-bottom: 14px;
    }

    .cta-band p {
        color: var(--text-muted);
        margin-bottom: 26px;
    }

footer {
    padding: 30px 24px 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    font-family: var(--font-mono);
}

@media (max-width:760px) {
    .cap-grid {
        grid-template-columns: 1fr;
    }

    .flow-stop, .flow-stop:nth-child(even) {
        flex-direction: column;
        text-align: center;
        gap: 18px;
    }

        .flow-stop:nth-child(even) .flow-copy, .flow-copy {
            text-align: center;
            max-width: 280px;
        }

    .trunk-line {
        left: 39px;
    }

    .flow-dot {
        left: 39px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}