:root {
    --copper: #B85B3F;
    --bronze: #8A4C32;
    --cream: #F9F6F0;
    --charcoal: #2A2A2A;
    --sand: #E5DCC5;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Lora', serif;
    --spacing-sm: 1.5rem;
    --spacing-md: 3.5rem;
    --spacing-lg: 6.5rem;
}

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

body {
    font-family: var(--font-body);
    color: var(--charcoal);
    background-color: var(--cream);
    line-height: 1.7;
    font-size: 1.05rem;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--bronze);
    line-height: 1.2;
}

img {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
}

/* Header */
.atd-matrix-header {
    background-color: var(--cream);
    border-bottom: 1px solid var(--sand);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 5%;
}

.atd-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.atd-brand-mark {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.atd-logo-geom {
    width: 40px;
    height: 40px;
}

.atd-brand-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--bronze);
}

.atd-primary-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.atd-primary-nav a {
    text-decoration: none;
    color: var(--charcoal);
    font-weight: 600;
    transition: color 0.3s ease;
}

.atd-primary-nav a:hover {
    color: var(--copper);
}

.atd-nav-action {
    border: 1px solid var(--copper);
    padding: 0.5rem 1rem;
    border-radius: 2px;
}

/* Hero */
.atd-thermal-hero {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: var(--spacing-lg) 5%;
    overflow: hidden;
    max-width: 1400px;
    margin: 0 auto;
    gap: 3rem;
}

.atd-abstract-shape-alpha {
    position: absolute;
    width: 60vw;
    height: 60vw;
    max-width: 800px;
    max-height: 800px;
    background: linear-gradient(135deg, var(--sand), var(--copper));
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    z-index: -1;
    opacity: 0.15;
    top: -20%;
    right: -10%;
    animation: drift 20s infinite alternate linear;
}

.atd-abstract-shape-beta {
    position: absolute;
    width: 40vw;
    height: 40vw;
    max-width: 500px;
    max-height: 500px;
    background: linear-gradient(45deg, var(--bronze), var(--copper));
    border-radius: 60% 40% 30% 70% / 50% 60% 40% 50%;
    z-index: -1;
    opacity: 0.1;
    bottom: -10%;
    left: -5%;
}

@keyframes drift {
    0% { transform: rotate(0deg) scale(1); }
    100% { transform: rotate(10deg) scale(1.05); }
}

.atd-hero-content {
    flex: 1 1 400px;
}

.atd-hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    color: var(--charcoal);
}

.atd-hero-sub {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: #444;
}

.atd-hero-visual {
    flex: 1 1 400px;
}

.atd-hero-visual img {
    border-radius: 4px 40px 4px 4px;
    box-shadow: 15px 15px 0 var(--sand);
}

.atd-btn-primary {
    display: inline-block;
    background-color: var(--copper);
    color: var(--cream);
    padding: 1rem 2rem;
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 2px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.atd-btn-primary:hover {
    background-color: var(--bronze);
    transform: translateY(-2px);
}

.atd-hero-metrics {
    margin-top: 2rem;
    border-top: 1px solid var(--sand);
    padding-top: 1rem;
}

.atd-metric-badge {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--bronze);
    font-weight: 600;
}

/* Deep Content / About */
.atd-deep-content-zone {
    display: flex;
    flex-wrap: wrap;
    padding: var(--spacing-lg) 5%;
    gap: 4rem;
    background-color: #fff;
    align-items: center;
}

.atd-deep-text-chamber {
    flex: 1 1 500px;
}

.atd-deep-text-chamber p {
    margin-bottom: 1.5rem;
}

.atd-inline-link {
    color: var(--copper);
    text-decoration: underline;
    text-decoration-color: var(--sand);
    text-underline-offset: 4px;
}

.atd-inline-link:hover {
    text-decoration-color: var(--copper);
}

.atd-data-callout {
    margin: 2rem 0;
    padding: 2rem;
    background-color: var(--cream);
    border-left: 4px solid var(--copper);
    display: flex;
    align-items: center;
    gap: 2rem;
}

.atd-data-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--bronze);
    line-height: 1;
}

.atd-data-label {
    font-size: 1rem;
    font-style: italic;
}

.atd-deep-visual-chamber {
    flex: 1 1 400px;
}

.atd-deep-visual-chamber img {
    border-radius: 2px;
    filter: sepia(0.2) contrast(1.1);
}

.atd-section-heading {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

/* Services Matrix */
.atd-solutions-framework {
    padding: var(--spacing-md) 5%;
    background-color: var(--cream);
}

.atd-section-header-centered {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-md) auto;
}

.atd-section-subheading {
    font-size: 1.2rem;
    color: #555;
}

.atd-solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.atd-solution-card {
    background: #fff;
    border: 1px solid var(--sand);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.atd-solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(138, 76, 50, 0.1);
}

.atd-solution-card img {
    height: 250px;
}

.atd-solution-details {
    padding: 2rem;
}

.atd-solution-details h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Telemetry (Testimonials) */
.atd-client-telemetry {
    padding: var(--spacing-lg) 5%;
    background-color: var(--charcoal);
    color: var(--cream);
}

.atd-client-telemetry .atd-section-heading {
    color: var(--sand);
    text-align: center;
}

.atd-telemetry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.atd-telemetry-node {
    background: rgba(255,255,255,0.05);
    padding: 2rem;
    border-top: 3px solid var(--copper);
}

.atd-client-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: 1rem;
    border: 2px solid var(--sand);
}

.atd-client-quote {
    font-style: italic;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.atd-client-id {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--copper);
}

/* FAQ */
.atd-technical-faq {
    padding: var(--spacing-md) 5%;
    background-color: #fff;
}

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

.atd-faq-item {
    border-bottom: 1px solid var(--sand);
}

.atd-faq-trigger {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 1.5rem 0;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--bronze);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.atd-faq-trigger::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--copper);
}

.atd-faq-trigger.active::after {
    content: '−';
}

.atd-faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.atd-faq-content p {
    padding-bottom: 1.5rem;
    color: #444;
}

/* Contact */
.atd-contact-portal {
    padding: var(--spacing-lg) 5%;
    background-color: var(--sand);
}

.atd-contact-wrapper {
    display: flex;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.atd-contact-info {
    flex: 1 1 350px;
    padding: 4rem;
    background-color: var(--bronze);
    color: var(--cream);
}

.atd-contact-info .atd-section-heading {
    color: var(--cream);
}

.atd-fine-print {
    margin-top: 3rem;
    font-size: 0.8rem;
    opacity: 0.7;
}

.atd-data-form {
    flex: 2 1 450px;
    padding: 4rem;
}

.atd-form-group {
    margin-bottom: 1.5rem;
}

.atd-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--charcoal);
}

.atd-form-group input,
.atd-form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    font-family: var(--font-body);
    background-color: var(--cream);
}

.atd-form-group input:focus,
.atd-form-group textarea:focus {
    outline: none;
    border-color: var(--copper);
}

/* Footer */
.atd-footer-base {
    background-color: var(--charcoal);
    color: var(--sand);
    padding: 4rem 5% 2rem;
}

.atd-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto 3rem;
}

.atd-footer-col h4 {
    color: var(--cream);
    margin-bottom: 1.5rem;
}

.atd-footer-col a {
    color: var(--copper);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
}

.atd-footer-col a:hover {
    text-decoration: underline;
}

.atd-footer-col .atd-brand-text {
    display: block;
    margin-bottom: 1rem;
    color: var(--cream);
}

.atd-footer-copyright {
    text-align: center;
    border-top: 1px solid rgba(229, 220, 197, 0.2);
    padding-top: 2rem;
    font-size: 0.9rem;
}

/* Responsive Details */
@media (max-width: 768px) {
    .atd-primary-nav {
        display: none; /* Simplified for mobile in this demo */
    }
    .atd-contact-wrapper {
        flex-direction: column;
    }
    .atd-contact-info, .atd-data-form {
        padding: 2rem;
    }
}