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

:root {
    --cream: #faf8f5;
    --warm-gray: #f0ede8;
    --dark: #1a1a2e;
    --text: #2d2d44;
    --text-muted: #6b6b80;
    --accent: #e07a5f;
    --accent-hover: #c96850;
    --border: #e5e0d8;
    --white: #ffffff;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--cream);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
nav {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    background: var(--white);
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark);
    letter-spacing: -0.02em;
}

/* Hero */
.hero {
    padding: 80px 0 60px;
    text-align: center;
}

.badge {
    display: inline-block;
    background: var(--warm-gray);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 24px;
}

h1 {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--dark);
    margin-bottom: 20px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

/* Pillars */
.pillars {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto 48px;
    text-align: left;
}

.pillar {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 20px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.pillar strong {
    color: var(--dark);
}

.pillar span {
    color: var(--text-muted);
}

/* Form */
.signup-form {
    max-width: 460px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 8px;
}

.input-group input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--white);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

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

.input-group input::placeholder {
    color: var(--text-muted);
}

.input-group button {
    padding: 12px 24px;
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.input-group button:hover {
    background: var(--accent-hover);
}

.form-note {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-message {
    margin-top: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 10px 14px;
    border-radius: 8px;
    display: none;
}

.form-message.success {
    background: #e8f5e9;
    color: #2e7d32;
    display: block;
}

.form-message.error {
    background: #fbe9e7;
    color: #c62828;
    display: block;
}

/* How it works */
.how-it-works {
    padding: 80px 0;
    background: var(--white);
}

.how-it-works h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 48px;
}

.steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.step {
    padding: 24px;
    border-radius: 12px;
    background: var(--cream);
    border: 1px solid var(--border);
}

.step-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 8px;
}

.step h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Why / Research */
.why {
    padding: 80px 0;
}

.why h2 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.research-cards {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
}

.research-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.research-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.research-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.research-card em {
    font-style: italic;
    color: var(--text);
}

/* Origin / About */
.origin {
    padding: 80px 0;
    background: var(--white);
    text-align: center;
}

.origin h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.origin-text {
    max-width: 580px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.dog-ascii {
    margin-top: 32px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.3;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* CTA */
.cta {
    padding: 80px 0;
    text-align: center;
    background: var(--warm-gray);
    border-top: 1px solid var(--border);
}

.cta h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.cta p {
    color: var(--text-muted);
    max-width: 500px;
    margin: 0 auto 32px;
    font-size: 1rem;
}

/* Footer */
footer {
    padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--white);
}

/* Responsive */
@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }

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

    .research-cards {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
    }

    .input-group button {
        width: 100%;
    }

    .hero {
        padding: 48px 0 40px;
    }

    .how-it-works, .why, .origin, .cta {
        padding: 48px 0;
    }
}