/* --- System Design Tokens --- */
:root {
    --color-dark: #0f172a;       
    --color-surface: #ffffff;
    --color-gray-light: #f8fafc;
    --color-border: #e2e8f0;
    --color-text-main: #1e293b;
    --color-text-muted: #64748b;
    --color-accent: #0d9488;     
    
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
}

/* --- Base Structural Setup --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-gray-light);
    color: var(--color-text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 90%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 80px 0;
}

.text-center { text-align: center; }
.max-w-md { max-width: 800px; margin: 0 auto; }
.max-w-sm { max-width: 520px; margin: 0 auto; }

/* --- Advanced Typography --- */
h1, h2, h3, h4 {
    color: var(--color-dark);
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
}

h1 { font-size: 3.25rem; line-height: 1.15; }
h2 { font-size: 2.5rem; }
h3 { font-family: var(--font-sans); font-size: 1.35rem; }
.lead { font-size: 1.25rem; color: var(--color-text-muted); font-weight: 300; }

/* --- Navigation Layout --- */
.navbar {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.brand {
    display: flex;
    align-items: center;
}

.logo {
    height: 42px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* --- Interactive Elements --- */
.btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-dark);
    color: #ffffff;
    border: none;
}

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

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

.btn-secondary:hover {
    background-color: var(--color-dark);
    color: #ffffff;
}

.btn-text {
    color: var(--color-dark);
    padding: 12px 0;
    font-weight: 600;
}

.btn-text:hover {
    color: var(--color-accent);
}

/* --- Hero Frame --- */
.hero {
    background-color: #ffffff;
    border-bottom: 1px solid var(--color-border);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
    padding: 100px 0;
}

.tagline {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    font-weight: 700;
    display: block;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    font-weight: 300;
}

.cta-group {
    display: flex;
    gap: 24px;
    align-items: center;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.metric-card-mock {
    background-color: var(--color-dark);
    border-radius: 14px;
    padding: 40px;
    width: 100%;
    max-width: 340px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
}

.mock-bars {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    height: 120px;
    margin-bottom: 30px;
}

.bar {
    background-color: rgba(255,255,255,0.1);
    width: 100%;
    border-radius: 4px;
}

.bar-1 { height: 35%; background-color: #ffffff; }
.bar-2 { height: 60%; background-color: #ffffff; }
.bar-3 { height: 100%; background-color: var(--color-accent); }

.mock-title {
    color: rgba(255,255,255,0.7);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    display: block;
    font-weight: 500;
}

/* --- Capabilities Section --- */
.expertise-section {
    background-color: var(--color-gray-light);
}

.section-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    display: block;
    text-align: center;
    margin-bottom: 10px;
    font-weight: 600;
}

.section-heading {
    text-align: center;
    margin-bottom: 60px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.card {
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 40px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.03);
    border-color: var(--color-accent);
}

.card-icon {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 25px;
    font-style: italic;
}

.card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-top: 12px;
}

/* --- Framework Suite Layout --- */
.engine-section {
    background-color: #ffffff;
}

.engine-bg {
    background-color: var(--color-dark);
    border-radius: 20px;
    padding: 80px 60px;
    color: #ffffff;
}

.engine-bg h2 { color: #ffffff; }

.tagline-light {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    font-weight: 700;
    display: block;
    margin-bottom: 15px;
}

.engine-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    margin-top: 60px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 40px;
}

.feature-item h4 {
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-item p {
    color: rgba(255,255,255,0.65);
    font-size: 0.95rem;
}

/* --- Secure Forms --- */
.contact-section {
    background-color: var(--color-gray-light);
    border-top: 1px solid var(--color-border);
}

.contact-form {
    display: flex;
    gap: 12px;
    margin-top: 35px;
}

.contact-form input {
    flex: 1;
    padding: 16px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
}

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

/* --- Corporate Footer --- */
footer {
    background-color: #ffffff;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    padding: 40px 0;
}

/* Responsive Adaptive Viewports */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 50px; text-align: center; }
    .cta-group { justify-content: center; }
    h1 { font-size: 2.5rem; }
    .engine-bg { padding: 40px 20px; }
    .footer-container { flex-direction: column; gap: 12px; text-align: center; }
    .nav-links { display: none; }
}