:root {
    --bg-dark: #0a0a0a;
    --bg-panel: #141414;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --border-color: #2a2a2a;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo .x {
    color: var(--accent);
    font-weight: 900;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.primary-btn {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 0 10px var(--accent-glow);
}

.primary-btn:hover {
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-1px);
}

.hero {
    padding: 6rem 3rem;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.glow-orb {
    position: absolute;
    width: 300px;
    height: 300px;
    background: var(--accent);
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    animation: pulse-glow 8s infinite alternate ease-in-out;
}

@keyframes pulse-glow {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.15; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.25; }
}

h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, #a0a0a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 1.5rem;
}

.subsume-text {
    font-size: 0.9rem;
    color: #ef4444;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 4rem;
}

.metrics-grid {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.metric-card {
    background: var(--bg-panel);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    min-width: 200px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.metric-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.features {
    padding: 6rem 3rem;
    background: linear-gradient(to bottom, var(--bg-dark), var(--bg-panel));
}

.feature-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1000px;
    margin: 0 auto;
    gap: 4rem;
}

.feature-text {
    flex: 1;
}

.feature-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-text p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1.1rem;
}

.feature-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
}

.pulse-container {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.core-node {
    width: 60px;
    height: 60px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    z-index: 10;
    box-shadow: 0 0 20px var(--accent-glow);
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    border-radius: 50%;
    animation: ripple 2s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
}

.pulse-ring.delay {
    animation-delay: 1s;
}

@keyframes ripple {
    0% { transform: scale(0.3); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

footer {
    margin-top: auto;
    padding: 3rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
}

#auth-container {
    margin-top: 1rem;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.8s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

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