@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Outfit:wght@400;700&display=swap');

:root {
    --bg-dark: #050507;
    --text-main: #d0d0d5;
    --text-muted: #555560;
    --neon-blue: #00d4ff;
    --neon-green: #00ff66;
    --circuit-color: rgba(0, 212, 255, 0.12);
    --circuit-active: rgba(0, 212, 255, 0.8);
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
    cursor: none;
}

/* ===== Custom cursor — small neon dot ===== */
#cursor-dot {
    position: fixed;
    width: 8px;
    height: 8px;
    background: var(--neon-blue);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: screen;
    box-shadow: 0 0 12px var(--neon-blue), 0 0 30px rgba(0, 212, 255, 0.3);
    transition: transform 0.1s ease, opacity 0.3s ease;
}

#cursor-ring {
    position: fixed;
    width: 32px;
    height: 32px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.15s ease, width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
}

/* ===== Signal bar (scroll progress) ===== */
#signal-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-green));
    box-shadow: 0 0 10px var(--neon-blue);
    z-index: 200;
    transition: width 0.05s linear;
}

/* ===== Circuit SVG ===== */
#main-circuit {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.circuit-backbone {
    fill: none;
    stroke: var(--circuit-color);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.circuit-backbone-glow {
    fill: none;
    stroke: var(--circuit-active);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: drop-shadow(0 0 6px var(--neon-blue));
}

.circuit-dot {
    fill: var(--bg-dark);
    stroke: var(--circuit-color);
    stroke-width: 1.5;
    transition: all 0.6s ease;
}

.circuit-dot.lit {
    stroke: var(--neon-blue);
    fill: var(--neon-blue);
    filter: drop-shadow(0 0 10px var(--neon-blue));
}

.circuit-pulse {
    fill: none;
    stroke: var(--neon-blue);
    stroke-width: 1;
    opacity: 0;
}

.circuit-pulse.active {
    animation: pulse-ring 2.5s ease-out infinite;
}

@keyframes pulse-ring {
    0%   { r: 6; opacity: 0.5; }
    100% { r: 30; opacity: 0; }
}

/* Electron particle */
.circuit-electron {
    fill: #fff;
    filter: drop-shadow(0 0 6px var(--neon-blue)) drop-shadow(0 0 12px var(--neon-green));
}

/* ===== Typography ===== */
h1, h2, h3, .nav-logo { font-family: 'Outfit', sans-serif; color: #fff; }

h1 {
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 2rem;
    letter-spacing: -1px;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 520px;
}

/* ===== Layout ===== */
.flow-container {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
}

/* ===== Navigation ===== */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(5, 5, 7, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.nav-logo {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-main);
}

.nav-links { display: flex; gap: 1.5rem; }

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active { color: var(--neon-blue); }

/* ===== Flow Nodes (Sections) ===== */
.flow-node {
    position: relative;
    padding: 2rem 0 2rem 4rem;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.flow-node:first-child {
    min-height: 100vh;
    padding-top: 120px;
}

/* Node marker */
.node-marker {
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1.5px solid var(--circuit-color);
    background: var(--bg-dark);
    z-index: 2;
    transition: all 0.6s ease;
}

.node-marker::after {
    content: attr(data-label);
    position: absolute;
    left: -38px;
    top: 50%;
    transform: translateY(-50%);
    font-family: 'Inter', sans-serif;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 1px;
    opacity: 0.3;
    transition: opacity 0.5s ease;
}

.flow-node.in-view .node-marker {
    border-color: var(--neon-blue);
    background: var(--neon-blue);
    box-shadow: 0 0 15px var(--neon-blue), 0 0 40px rgba(0, 212, 255, 0.2);
}

.flow-node.in-view .node-marker::after {
    opacity: 1;
    color: var(--neon-blue);
}

/* Vertical circuit line */
.flow-node::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5px;
    height: 100%;
    background: var(--circuit-color);
}

.flow-node.in-view::before {
    background: linear-gradient(to bottom, var(--circuit-active), var(--circuit-color));
}

/* ===== Product Nodes ===== */
.product-node {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 2rem;
    border-radius: 2px;
    transition: var(--transition-smooth);
    position: relative;
}

.product-node::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -4rem;
    width: 4rem;
    height: 1.5px;
    background: var(--circuit-color);
    transform: translateY(-50%);
    transition: all 0.4s ease;
}

/* Small node dot where the branch meets the card */
.product-node::after {
    content: '';
    position: absolute;
    top: 50%;
    left: -8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--circuit-color);
    transform: translateY(-50%);
    transition: all 0.4s ease;
}

.product-node:hover {
    border-color: rgba(0, 212, 255, 0.2);
    background: rgba(0, 212, 255, 0.02);
}

.product-node:hover::before {
    background: var(--circuit-active);
    box-shadow: 0 0 8px var(--neon-blue);
}

.product-node:hover::after {
    background: var(--neon-blue);
    box-shadow: 0 0 8px var(--neon-blue);
}

.status-tag {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 800;
    padding: 0.15rem 0.5rem;
    border: 1px solid currentColor;
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.status-ready { color: var(--neon-green); }
.status-progress { color: rgba(0, 212, 255, 0.4); }

/* ===== Minimal Button ===== */
.btn-minimal {
    color: #fff;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 2rem;
    transition: var(--transition-smooth);
    letter-spacing: 0.5px;
}

.btn-minimal:hover {
    gap: 0.8rem;
    color: var(--neon-blue);
}

/* ===== Text Reveal Animation (Hero only) ===== */
.reveal-text {
    opacity: 0;
    transform: translateY(20px);
    animation: revealUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes revealUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Stagger — scroll triggered ===== */
.stagger {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Footer ===== */
footer {
    position: relative;
    z-index: 1;
    padding: 4rem 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    body { cursor: auto; }
    #cursor-dot, #cursor-ring { display: none; }
    .nav-links { display: none; }
    .flow-node { padding-left: 3rem; }
    .node-marker { left: -12px; }
    .node-marker::after { display: none; }
    .product-node::before { width: 3rem; left: -3rem; }
    .product-node::after { left: -6px; }
}