/* --- Variables & Setup --- */
:root {
    --forest-dark: #1A3621;
    --forest-mid: #3D5A45;
    --forest-sage: #8B9D77;
    --earth-light: #F4F6F3;
    --text-main: #2C352D;
    --text-muted: #5C6B5E;
    
    --font-head: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Space Mono', monospace;
    
    --trans-snappy: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--earth-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* CRITICAL IMAGE RULE */
img {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-head);
    font-weight: 700;
    line-height: 1.1;
    color: var(--forest-dark);
}

.vtd-section-heading {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.vtd-mono-text, .vtd-mono-badge {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

/* --- Components --- */
.vtd-action-trigger {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    text-decoration: none;
    padding: 1rem 2rem;
    border: 1px solid var(--forest-dark);
    cursor: pointer;
    transition: all var(--trans-snappy);
}

.vtd-primary-action {
    background-color: var(--forest-dark);
    color: var(--earth-light);
}

.vtd-primary-action:hover {
    background-color: var(--forest-mid);
    border-color: var(--forest-mid);
}

.vtd-btn-outline {
    background: transparent;
    color: var(--forest-dark);
    border: 1px solid var(--forest-dark);
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.vtd-btn-outline:hover {
    background: var(--forest-dark);
    color: var(--earth-light);
}

/* --- Header --- */
.vtd-site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(244, 246, 243, 0.95);
    backdrop-filter: blur(8px);
    z-index: 1000;
    border-bottom: 1px solid rgba(26, 54, 33, 0.1);
}

.vtd-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 4vw;
    max-width: 1600px;
    margin: 0 auto;
}

.vtd-brand-mark {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--forest-dark);
}

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

.vtd-nav-item {
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 600;
    transition: color var(--trans-snappy);
}

.vtd-nav-item:not(.vtd-btn-outline):hover {
    color: var(--forest-sage);
}

/* --- Hero --- */
.vtd-hero-canvas {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: flex-end;
    padding: 10vh 4vw;
}

.vtd-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.vtd-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(26, 54, 33, 0.9) 0%, rgba(26, 54, 33, 0.3) 100%);
    z-index: -1;
}

.vtd-hero-content {
    color: var(--earth-light);
    max-width: 800px;
}

.vtd-hero-content h1 {
    color: var(--earth-light);
    font-size: clamp(2.5rem, 6vw, 5rem);
    margin: 1rem 0 1.5rem;
}

.vtd-hero-sub {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 2.5rem;
    max-width: 600px;
    color: rgba(244, 246, 243, 0.8);
}

/* --- About (Prose Heavy) --- */
.vtd-prose-heavy-zone {
    padding: 12vw 4vw;
    background: var(--earth-light);
}

.vtd-prose-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8vw;
    max-width: 1400px;
    margin: 0 auto;
}

.vtd-prose-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.vtd-lead-text {
    font-size: 1.3rem !important;
    font-weight: 300;
    color: var(--forest-mid);
    margin-bottom: 2rem !important;
}

.vtd-data-callout {
    border-left: 4px solid var(--forest-sage);
    padding-left: 1.5rem;
    margin: 3rem 0;
}

.vtd-data-value {
    display: block;
    font-family: var(--font-head);
    font-size: 4rem;
    line-height: 1;
    color: var(--forest-dark);
}

.vtd-data-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.vtd-timestamp {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 3rem;
}

.vtd-prose-imagery {
    display: flex;
    flex-direction: column;
}

.vtd-image-spacer {
    height: 4vw;
}

.vtd-prose-imagery img:nth-child(3) {
    margin-left: -4vw;
    width: calc(100% + 4vw);
}

/* --- Services & Benefits --- */
.vtd-methodology-sector {
    padding: 8vw 4vw 12vw;
    background: #E8EBE6;
}

.vtd-sector-header {
    max-width: 600px;
    margin-bottom: 4rem;
}

/* Tabs */
.vtd-interactive-tabs {
    max-width: 1000px;
    margin-bottom: 6rem;
}

.vtd-tab-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(26, 54, 33, 0.2);
    padding-bottom: 1rem;
    overflow-x: auto;
}

.vtd-tab-btn {
    background: none;
    border: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem 0;
    transition: color var(--trans-snappy);
    white-space: nowrap;
}

.vtd-tab-btn.active {
    color: var(--forest-dark);
    font-weight: 700;
}

.vtd-tab-panels {
    position: relative;
}

.vtd-tab-panel {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.vtd-tab-panel.active {
    display: block;
}

.vtd-tab-panel h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Asymmetric Benefits */
.vtd-benefits-asymmetric {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: start;
}

.vtd-benefit-card {
    background: var(--earth-light);
    padding: 2.5rem;
    border-top: 3px solid var(--forest-mid);
}

.vtd-benefit-card h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.vtd-card-large {
    grid-row: span 2;
    padding: 0;
    border-top: none;
    background: transparent;
}

.vtd-card-large img {
    margin-bottom: 1.5rem;
    height: 300px;
}

/* --- Testimonials --- */
.vtd-client-echoes {
    padding: 10vw 4vw;
    background: var(--forest-dark);
    color: var(--earth-light);
}

.vtd-client-echoes .vtd-section-heading {
    color: var(--earth-light);
    margin-bottom: 6rem;
}

.vtd-echo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.vtd-echo-block {
    position: relative;
}

.vtd-echo-offset {
    margin-top: 4rem;
}

.vtd-quote {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 2rem;
    line-height: 1.7;
    color: rgba(244, 246, 243, 0.9);
}

.vtd-echo-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.vtd-echo-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--forest-sage);
}

.vtd-author-name {
    display: block;
    font-family: var(--font-head);
    font-weight: 700;
}

.vtd-author-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--forest-sage);
}

/* --- Contact --- */
.vtd-inquiry-zone {
    padding: 8vw 4vw;
}

.vtd-inquiry-wrapper {
    display: grid;
    grid-template-columns: 4fr 5fr;
    gap: 6vw;
    max-width: 1200px;
    margin: 0 auto;
}

.vtd-inquiry-visual img {
    height: 600px;
}

.vtd-micro-details {
    margin-top: 2rem;
    padding: 2rem;
    background: #E8EBE6;
}

.vtd-micro-details h4 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.vtd-form-layout {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.vtd-input-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
    color: var(--forest-mid);
}

.vtd-input-group input,
.vtd-input-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ccc;
    background: transparent;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.vtd-input-group input:focus,
.vtd-input-group textarea:focus {
    outline: none;
    border-color: var(--forest-dark);
}

.vtd-form-noise {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

/* --- Footer --- */
.vtd-base-plate {
    background: #112215;
    color: var(--earth-light);
    padding: 6vw 4vw 2vw;
    font-size: 0.9rem;
}

.vtd-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto 4rem;
    border-bottom: 1px solid rgba(244, 246, 243, 0.1);
    padding-bottom: 4rem;
}

.vtd-base-plate h3, .vtd-base-plate h4 {
    color: var(--forest-sage);
    margin-bottom: 1rem;
}

.vtd-base-plate a {
    color: var(--earth-light);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.vtd-base-plate a:hover {
    color: var(--forest-sage);
}

.vtd-sub-link {
    margin-top: 2rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    opacity: 0.6;
}

.vtd-footer-bottom {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: rgba(244, 246, 243, 0.5);
}

/* --- Responsive Leakage & Adaptation --- */
@media (max-width: 1024px) {
    .vtd-prose-grid, .vtd-inquiry-wrapper {
        grid-template-columns: 1fr;
    }
    .vtd-prose-imagery img:nth-child(3) {
        margin-left: 0;
        width: 100%;
    }
    .vtd-echo-grid {
        grid-template-columns: 1fr 1fr;
    }
    .vtd-echo-offset {
        margin-top: 0;
    }
}

@media (max-width: 768px) {
    .vtd-primary-nav {
        display: none; /* Simplified for mobile in this demo */
    }
    .vtd-benefits-asymmetric {
        grid-template-columns: 1fr;
    }
    .vtd-card-large {
        grid-row: auto;
    }
    .vtd-echo-grid {
        grid-template-columns: 1fr;
    }
    .vtd-footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .vtd-hero-content h1 {
        font-size: 2.5rem;
    }
}