:root {
    --bg-main: #F6F6F6;
    --bg-card: #FFFFFF;
    --text-main: #111111;
    --text-muted: #666666;
    --accent-blue: #005CB9;
    --border-color: #E5E5EA;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

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

h1, h2, h3 {
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

/* Buttons */
.btn-primary {
    background-color: var(--accent-blue);
    color: #FFFFFF;
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s ease, opacity 0.2s ease;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 92, 185, 0.2);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    color: #FFFFFF;
}

.btn-primary.large {
    padding: 1rem 2rem;
    font-size: 1.05rem;
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-blue);
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.btn-secondary:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background-color: rgba(0, 92, 185, 0.05);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 5% 4rem;
    max-width: 1400px;
    margin: 0 auto;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.eyebrow {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
    display: inline-block;
}

.hero h1 {
    font-size: clamp(3rem, 7vw, 5rem);
    margin-bottom: 1rem;
    letter-spacing: -0.04em;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Hero Visual (Mockup) */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.phone-mockup {
    width: 320px;
    height: 650px;
    background-color: var(--bg-main);
    border: 12px solid var(--border-color);
    border-radius: 44px;
    padding: 2.5rem 1.5rem;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.1), 0 0 0 1px var(--border-color);
    overflow: hidden;
}

/* Add a subtle glow behind the phone */
.phone-mockup::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(0, 92, 185, 0.08) 0%, transparent 60%);
    transform: translate(-50%, -50%);
    z-index: 0;
    pointer-events: none;
}

.app-screen {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.app-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.accent-text {
    font-family: var(--font-mono);
    color: var(--accent-blue);
    font-size: 1.5rem;
    font-weight: 700;
}

.app-streak p {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.app-streak h3 {
    font-size: 2.5rem;
}

.dailies-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-top: auto;
    margin-bottom: 2rem;
}

.grid-cell {
    aspect-ratio: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.grid-cell.active {
    background-color: rgba(0, 92, 185, 0.3);
    border-color: rgba(0, 92, 185, 0.4);
}
.grid-cell.active.high {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* Idea Section */
.idea-section {
    padding: 8rem 0;
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.text-container {
    max-width: 800px;
    margin: 0 auto;
}

.idea-section h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 2.5rem;
    letter-spacing: -0.03em;
}

.text-content {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-muted);
}

.text-content p {
    margin-bottom: 1.5rem;
}

.footer {
    padding: 4rem 0;
    background-color: var(--bg-main);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.brand {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

.brand p {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 0.25rem;
}

.links {
    display: flex;
    gap: 2rem;
}

.links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.links a:hover {
    color: var(--accent-blue);
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        padding-top: 8rem;
        text-align: center;
    }
    
    .hero-content {
        margin: 0 auto;
    }

    .cta-group {
        justify-content: center;
    }
}