:root {
    --bg-primary: #FFFFFF;
    --text-main: #1D1D1F;
    --text-muted: #424245;
    --accent: #2563EB;
    --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 5vw;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 5vw;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.02);
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-container img {
    height: 48px; 
    width: auto;
    object-fit: contain;
    display: block;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

h1, h2, h3 {
    line-height: 1.05;
    letter-spacing: -0.04em;
}

h1 { font-size: 5.5rem; font-weight: 700; margin-bottom: 24px; }
h2 { font-size: 3.5rem; font-weight: 700; margin-bottom: 24px; }

p {
    font-size: 1.35rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 650px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--text-main);
    color: #fff;
    padding: 18px 36px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #000;
    transform: translateY(-2px);
}

section {
    padding: 180px 0;
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.text-left .text-content { order: 1; }
.text-left .visual-content { order: 2; }

.text-right .text-content { order: 2; }
.text-right .visual-content { order: 1; }

.centered-layout {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.centered-layout p {
    margin: 0 auto 40px auto;
}

.svg-container {
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #FFFFFF;
    border: 2px solid #FFFFFF; 
    border-radius: 32px;
    padding: 60px;
}

.hero-visual { 
    background: transparent; 
    border: none;
    padding: 0; 
    margin-top: 80px; 
}

.wireframe-stroke {
    stroke: var(--text-main);
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.wireframe-muted {
    stroke: var(--text-muted);
    stroke-width: 1.5;
    fill: none;
    stroke-opacity: 0.4;
}

.accent-fill {
    fill: var(--accent);
}

.join-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 450px;
    margin: 0 auto;
}

.join-form input {
    padding: 18px 24px;
    border: 1px solid #d2d2d7;
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s;
}

.join-form input:focus {
    border-color: var(--accent);
}

footer {
    padding: 60px 5vw;
    border-top: 1px solid #e5e5ea;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 14px;
}

footer a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 30px;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--text-main);
}

@media (max-width: 1024px) {
    h1 { font-size: 4rem; }
    h2 { font-size: 3rem; }
    .split-layout { gap: 60px; }
}

@media (max-width: 768px) {
    h1 { font-size: 3.2rem; }
    h2 { font-size: 2.4rem; }
    .split-layout { grid-template-columns: 1fr; gap: 40px; }
    .text-left .text-content, .text-right .text-content { order: 1; }
    .text-left .visual-content, .text-right .visual-content { order: 2; }
    section { padding: 100px 0; }
    .nav-links { display: none; }
    .svg-container { padding: 40px; }
}