/* --- Global Variables & Resets --- */
:root {
    --bg-main: #0B0F19;
    --bg-surface: #1E293B;
    --text-primary: #F8FAFC;
    --text-muted: #94A3B8;
    --color-primary: #6366F1;
    --color-primary-hover: #4F46E5;
    --color-accent: #38BDF8;
    --border-color: #334155;
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
}

/* --- Layout Utility Classes --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.flex-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.grid {
    display: grid;
    gap: 32px;
    margin-top: 48px;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.text-center { text-align: center; }

/* --- Typographical Elements --- */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: 2.25rem;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-top: 12px;
}

/* --- Interactive Components --- */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.1s ease;
    cursor: pointer;
    border: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #FFF;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.1rem;
}

/* --- Navigation Bar --- */
.navbar {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
}

.logo span {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
}

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

/* --- Hero Frame --- */
.hero-section {
    padding: 120px 0 80px;
}

.hero-title {
    font-size: 3.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title span {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 24px auto 40px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* --- Features Grid Structure --- */
.features-section {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
}

.feature-card {
    background-color: var(--bg-surface);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
}

/* --- Pricing Blocks --- */
.pricing-section {
    padding: 80px 0;
    background-color: rgba(30, 41, 59, 0.3);
    border-top: 1px solid var(--border-color);
}

.price-card {
    background-color: var(--bg-surface);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: relative;
}

.price-card.popular {
    border-color: var(--color-primary);
}

.badge {
    position: absolute;
    top: -14px;
    right: 24px;
    background-color: var(--color-primary);
    color: #FFF;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 20px 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
}

.price-features li {
    margin-bottom: 12px;
    color: var(--text-muted);
}

.price-features li::before {
    content: "✓ ";
    color: var(--color-accent);
    margin-right: 8px;
}

/* --- Lead Generation Input Section --- */
.signup-section {
    padding: 100px 0;
    border-top: 1px solid var(--border-color);
}

.signup-form {
    margin-top: 32px;
    display: flex;
    justify-content: center;
    gap: 12px;
}

.signup-form input {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 14px 20px;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    width: 100%;
    max-width: 400px;
}

.signup-form input:focus {
    outline: 2px solid var(--color-primary);
}

/* --- Footer Wrap --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 20px;
}

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

/* --- Responsive Adjustments --- */
@media (max-width: 640px) {
    .hero-title { font-size: 2.5rem; }
    .flex-row { flex-direction: column; gap: 16px; text-align: center; }
    .signup-form { flex-direction: column; align-items: center; }
    .signup-form input { max-width: 100%; }
    .signup-form .btn { width: 100%; }
}