:root {
    --color-primary: #3b82f6; /* Blue 500 */
    --color-secondary: #475569; /* Slate 600 */
    --color-dark: #0f172a; /* Slate 900 */
    --color-light: #f8fafc; /* Slate 50 */
    --color-gray: #94a3b8; /* Slate 400 */
    --color-white: #ffffff;
    --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --container-width: 1120px;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    color: var(--color-secondary);
    background-color: var(--color-white);
}

h1, h2, h3 {
    color: var(--color-dark);
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.25rem; }

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }
.alt-bg { background-color: var(--color-light); }

/* --- Header --- */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid #e2e8f0; /* Slate 200 */
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo { font-size: 1.25rem; font-weight: bold; color: var(--color-dark); }
.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--color-secondary);
    font-weight: 500;
}
.main-nav a:hover { color: var(--color-dark); text-decoration: none; }

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.2s;
}
.btn-primary { background-color: var(--color-primary); color: var(--color-white); border: 1px solid var(--color-primary); }
.btn-primary:hover { background-color: #2563eb; text-decoration: none; }

.btn-secondary {
    background-color: transparent;
    color: var(--color-dark);
    border: 1px solid #cbd5e1; /* Slate 300 */
}
.btn-secondary:hover { background-color: var(--color-light); text-decoration: none; }

/* --- Sections --- */
.hero-section { padding: var(--spacing-xl) 0; }
.feature-section, .inquiry-section { padding: var(--spacing-lg) 0; }

.section-title { font-size: 2rem; margin-bottom: 1rem; }
.section-subtitle { font-size: 1.1rem; color: var(--color-secondary); max-width: 600px; margin: 0 auto 2rem; }

/* Hero */
.hero-title { font-size: 2.8rem; margin-bottom: var(--spacing-md); }
.hero-subtitle { font-size: 1.5rem; color: var(--color-dark); margin-bottom: 1rem; }
.hero-description { font-size: 1.1rem; margin-bottom: 1.5rem; }
.hero-price { font-size: 1.2rem; font-weight: bold; color: var(--color-primary); margin-bottom: 2rem; }
.hero-cta { display: flex; justify-content: center; gap: 1rem; }

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.feature-item {
    background: var(--color-light);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    text-align: center;
}
.feature-item h3 { margin-bottom: 0.5rem; }

/* How to Use */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.step { text-align: center; }
.step strong { display: block; font-size: 1.1rem; color: var(--color-primary); margin-bottom: 0.5rem; }

/* Pricing */
.pricing-card {
    max-width: 400px;
    margin: 2rem auto 0;
    padding: var(--spacing-lg);
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    background-color: var(--color-white);
}
.pricing-card .price { font-size: 2.5rem; font-weight: bold; color: var(--color-dark); margin: 0.5rem 0; }
.pricing-features { list-style: none; margin: 1.5rem 0; }
.pricing-features li { margin-bottom: 0.5rem; }
.price-add-on { margin: 1.5rem 0; font-weight: 500; }


/* --- Form --- */
.inquiry-form { max-width: 600px; margin: 2rem auto 0; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: 0.5rem; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
}
.form-group-checkbox { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem; }
#privacy-consent { width: auto; }
.btn-submit { width: 100%; padding: 1rem; font-size: 1.1rem; }

.form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    display: none; /* Hidden by default */
}
.form-status.success { background-color: #dcfce7; color: #166534; }
.form-status.error { background-color: #fee2e2; color: #991b1b; }

/* --- Footer --- */
.footer {
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid #e2e8f0;
    color: var(--color-gray);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .hero-title { font-size: 2.2rem; }
    .header-content { flex-direction: column; gap: 1rem; }
    .main-nav ul { flex-wrap: wrap; justify-content: center; }
    .header-actions { display: none; } /* Hide on mobile for simplicity, can be moved to a burger menu */
}