/* --- Design Core & Variables (Refined, Simple, Clean Layout) --- */
:root {
    --color-bg: #FFFFFF;
    --color-dark: #111111;
    --color-light: #F7F7F8;
    --color-border: #E4E4E7;
    --color-text-main: #27272A;
    --color-text-muted: #71717A;
    --color-accent: #0066CC;
    --color-accent-green: #10B981;
    
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --- Resets --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-stack);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
html { scroll-behavior: smooth; }

/* --- Structures --- */
.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
.section { padding: 6rem 0; border-bottom: 1px solid var(--color-border); }
.bg-light { background-color: var(--color-light); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

.eyebrow { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-accent); font-weight: 600; display: block; margin-bottom: 1rem; }
.eyebrow-success { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-accent-green); font-weight: 600; display: block; margin-bottom: 1rem; }

.section-title { margin-bottom: 4rem; max-width: 600px; }
.section-title h2 { font-size: 2.25rem; font-weight: 700; color: var(--color-dark); margin-bottom: 1rem; letter-spacing: -0.02em; }
.section-title p { font-size: 1.15rem; color: var(--color-text-muted); }

/* --- Header --- */
.site-header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
}
.header-container { height: 72px; display: flex; align-items: center; justify-content: space-between; }
.brand { font-size: 1.25rem; font-weight: 700; color: var(--color-dark); text-decoration: none; }
.nav-links a { color: var(--color-text-main); text-decoration: none; font-size: 0.95rem; margin-left: 2rem; transition: color 0.15s; }
.nav-links a:hover { color: var(--color-accent); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background-color: var(--color-dark); }

/* --- Interactive Elements / Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.25rem;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.btn-dark { background-color: var(--color-dark); color: #FFF; border: 1px solid var(--color-dark); }
.btn-dark:hover { background-color: #222; }

.btn-primary { background-color: var(--color-accent); color: #FFF; border: 1px solid var(--color-accent); }
.btn-primary:hover { background-color: #0052a3; }

.btn-link { color: var(--color-dark); font-weight: 600; padding: 0.5rem 0; }
.btn-link:hover { color: var(--color-accent); }
.btn-wide { width: 100%; }

/* --- Hero --- */
.hero { padding: 11rem 0 7rem 0; border-bottom: 1px solid var(--color-border); }
.hero-container { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: center; }
.hero h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.15; color: var(--color-dark); letter-spacing: -0.03em; }
.hero .lead { font-size: 1.25rem; color: var(--color-text-muted); margin: 1.5rem 0 2.5rem 0; }
.hero-cta { display: flex; gap: 1.5rem; align-items: center; }

.hero-right { display: flex; flex-direction: column; gap: 1.5rem; }
.metric-card { background: var(--color-light); border: 1px solid var(--color-border); padding: 1.5rem; border-radius: 8px; }
.metric-val { font-size: 2rem; font-weight: 700; color: var(--color-dark); }
.metric-label { font-size: 0.9rem; color: var(--color-text-muted); margin-top: 0.25rem; }

/* --- Simple Content Grid Cards --- */
.focus-box { background-color: #FFF; border: 1px solid var(--color-border); padding: 3rem; border-radius: 8px; }
.focus-tag { font-size: 0.75rem; text-transform: uppercase; color: var(--color-text-muted); font-weight: 600; margin-bottom: 1rem; letter-spacing: 0.05em; }
.focus-box h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; color: var(--color-dark); }
.focus-box p { color: var(--color-text-muted); }

.card { background-color: #FFF; border: 1px solid var(--color-border); padding: 2rem; border-radius: 8px; }
.card h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--color-dark); }
.card p { font-size: 0.95rem; color: var(--color-text-muted); }

/* --- App Landscape / Showcase Component --- */
.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.showcase-text h2 { font-size: 2.25rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--color-dark); letter-spacing: -0.02em; }
.showcase-text p { font-size: 1.1rem; color: var(--color-text-muted); margin-bottom: 2rem; }

.bullet-features { list-style: none; margin-bottom: 2.5rem; }
.bullet-features li { position: relative; padding-left: 1.5rem; margin-bottom: 0.75rem; color: var(--color-text-main); }
.bullet-features li::before { content: "•"; position: absolute; left: 0; color: var(--color-accent); font-weight: bold; font-size: 1.2rem; top: -2px; }

.app-store-button { background-color: var(--color-dark); color: #FFF; display: inline-flex; align-items: center; gap: 0.75rem; padding: 0.5rem 1.25rem; border-radius: 8px; cursor: pointer; }
.as-icon { font-size: 1.75rem; }
.as-labels { display: flex; flex-direction: column; }
.as-small { font-size: 0.65rem; text-transform: uppercase; color: #A1A1AA; }
.as-large { font-size: 1rem; font-weight: 600; line-height: 1.1; }

/* --- Market Discovery App Preview --- */
.showcase-phone-wrapper { display: flex; justify-content: center; min-width: 0; }
.smartphone-frame {
    width: 320px;
    max-width: 100%;
    background: #172D47;
    border: 8px solid #27272A;
    border-radius: 40px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}
.phone-screen { display: block; width: 100%; height: auto; }

/* --- Clean Form Style --- */
.clean-form { background: #FFF; border: 1px solid var(--color-border); padding: 2.5rem; border-radius: 8px; }
.form-row { margin-bottom: 1.25rem; }
.form-row label { display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 0.4rem; color: var(--color-dark); }
.form-row input, .form-row select, .form-row textarea {
    width: 100%; padding: 0.65rem; border: 1px solid var(--color-border); background-color: var(--color-light); border-radius: 6px; font-size: 0.95rem; color: var(--color-dark); font-family: var(--font-stack);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--color-accent); background-color: #FFF; }
.tech-labels { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.tech-labels span { font-size: 0.8rem; background: var(--color-light); border: 1px solid var(--color-border); padding: 0.3rem 0.6rem; border-radius: 4px; color: var(--color-text-muted); }

.form-email-note { margin-top: 1rem; font-size: 0.85rem; color: var(--color-text-muted); }
.form-email-note a { color: var(--color-accent); overflow-wrap: anywhere; }
.form-status { margin-top: 1rem; padding: 0.75rem; font-size: 0.9rem; border-radius: 6px; }
.form-status.ok { background-color: #DCFCE7; color: #166534; }
.form-status.err { background-color: #FEE2E2; color: #991B1B; }
.hidden { display: none; }

/* --- Footer --- */
.site-footer { padding: 3rem 0; font-size: 0.85rem; color: var(--color-text-muted); }
.footer-box { display: flex; justify-content: space-between; align-items: center; }

/* --- Mobile Breakpoints --- */
@media (max-width: 768px) {
    .grid-2, .grid-3, .hero-container, .showcase-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero h1 { font-size: 2.5rem; }
    .nav-toggle { display: flex; }
    .nav-links { display: none; position: absolute; top: 72px; left: 0; width: 100%; background: #FFF; padding: 1.5rem; border-bottom: 1px solid var(--color-border); flex-direction: column; }
    .nav-links.active { display: flex; }
    .nav-links a { margin: 0 0 1rem 0; }
}