/* ========================================
   Applied Trails Research - V3
   Light Theme + Holographic Terrain
   ======================================== */

:root {
    --green-700: #15803d;
    --green-600: #059669;
    --green-500: #10b981;
    --green-400: #34d399;
    --green-100: #d1fae5;
    --green-50: #ecfdf5;

    --blue-600: #0284c7;
    --blue-500: #0ea5e9;
    --blue-100: #e0f2fe;

    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;

    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'DM Serif Display', Georgia, serif;

    --container: 1200px;
    --radius: 8px;
    --radius-lg: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    color: var(--gray-900);
    line-height: 1.2;
}

h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(28px, 4vw, 40px); }
h3 { font-size: 20px; }

.lead {
    font-size: 18px;
    color: var(--gray-600);
}

.section-eyebrow {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--green-600);
    margin-bottom: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-sans);
    text-decoration: none;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--green-600);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--green-500);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.link {
    color: var(--green-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
}

.link:hover {
    color: var(--green-500);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-logo img {
    height: 36px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu a {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius);
}

.nav-menu a:hover {
    color: var(--gray-900);
    background: var(--gray-50);
}

.nav-menu .nav-cta {
    background: var(--green-600);
    color: var(--white);
    margin-left: 8px;
}

.nav-menu .nav-cta:hover {
    background: var(--green-500);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
}

/* Hero */
.hero {
    padding: 140px 0 80px;
    background: var(--white);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-eyebrow {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--green-600);
    margin-bottom: 16px;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-lead {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 12px;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Stats */
.stats {
    padding: 48px 0;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 40px;
    color: var(--green-600);
}

.stat-label {
    font-size: 14px;
    color: var(--gray-500);
}

/* About */
.about {
    padding: 100px 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 80px;
}

.about h2 {
    margin-bottom: 24px;
}

.about .lead {
    margin-bottom: 16px;
}

.about-content > p {
    margin-bottom: 32px;
}

.expertise-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.expertise-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-700);
}

.expertise-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--green-500);
    border-radius: 50%;
    flex-shrink: 0;
}

/* Principal Card */
.principal-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 16px;
}

.principal-avatar {
    width: 64px;
    height: 64px;
    background: var(--green-600);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 20px;
}

.principal-card h3 {
    margin-bottom: 4px;
}

.principal-title {
    font-size: 14px;
    color: var(--green-600);
    margin-bottom: 12px;
}

.principal-card > p {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.memberships {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
}

.memberships > span {
    font-size: 13px;
    color: var(--gray-500);
}

.membership-badges {
    display: flex;
    gap: 8px;
}

.membership-badges span {
    padding: 4px 12px;
    background: var(--blue-100);
    color: var(--blue-600);
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
}

/* ========================================
   Terrain Visualization Section
   ======================================== */
.terrain-section {
    position: relative;
    height: 500px;
    background: linear-gradient(135deg, var(--green-50) 0%, var(--gray-50) 50%, var(--blue-100) 100%);
    overflow: hidden;
}

.terrain-wrapper {
    position: absolute;
    inset: 0;
}

#terrain-canvas {
    width: 100%;
    height: 100%;
}

.terrain-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(5, 150, 105, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(5, 150, 105, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.terrain-content {
    position: relative;
    z-index: 10;
    height: 100%;
    display: flex;
    align-items: center;
}

.terrain-text {
    max-width: 480px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(5, 150, 105, 0.15);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.terrain-text h2 {
    margin-bottom: 16px;
}

.terrain-text > p {
    color: var(--gray-600);
    margin-bottom: 32px;
    font-size: 15px;
}

.terrain-stats {
    display: flex;
    gap: 32px;
}

.terrain-stat {
    display: flex;
    flex-direction: column;
}

.terrain-stat-value {
    font-family: var(--font-serif);
    font-size: 20px;
    color: var(--green-600);
    font-weight: 600;
}

.terrain-stat-label {
    font-size: 12px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Services */
.services {
    padding: 100px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header > p:last-child {
    color: var(--gray-500);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.service-card:hover {
    border-color: var(--green-300);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.service-icon {
    width: 48px;
    height: 48px;
    background: var(--green-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green-600);
    margin-bottom: 20px;
}

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

.service-card > p {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.7;
}

/* Testimonial */
.testimonial {
    padding: 100px 0;
    background: linear-gradient(135deg, #064e3b 0%, #059669 50%, #34d399 100%);
    position: relative;
}

.testimonial::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.testimonial blockquote {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.testimonial p {
    font-family: var(--font-serif);
    font-size: clamp(20px, 3vw, 26px);
    color: var(--white);
    line-height: 1.5;
    margin-bottom: 32px;
}

.testimonial cite {
    display: block;
    font-style: normal;
}

.testimonial cite strong {
    display: block;
    color: var(--white);
    margin-bottom: 4px;
}

.testimonial cite span {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* Portfolio */
.portfolio {
    padding: 100px 0;
    background: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.portfolio-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    display: block;
    aspect-ratio: 4/3;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.portfolio-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    color: var(--white);
}

.portfolio-tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(255,255,255,0.2);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.portfolio-info h3 {
    color: var(--white);
    font-size: 18px;
    margin-bottom: 4px;
}

.portfolio-info p {
    font-size: 14px;
    opacity: 0.8;
}

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

/* Contact */
.contact {
    padding: 100px 0;
    background: var(--gray-50);
    background-image:
        linear-gradient(var(--gray-200) 1px, transparent 1px),
        linear-gradient(90deg, var(--gray-200) 1px, transparent 1px);
    background-size: 80px 80px;
    background-position: -1px -1px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info h2 {
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--gray-600);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-500);
}

.contact-item a {
    font-size: 18px;
    color: var(--gray-900);
    text-decoration: none;
}

.contact-item a:hover {
    color: var(--green-600);
}

/* Contact Form */
.contact-form {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: var(--font-sans);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: var(--white);
    color: var(--gray-900);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px var(--green-100);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form .btn {
    width: 100%;
    justify-content: center;
}

/* Footer */
.footer {
    padding: 80px 0 40px;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand img {
    height: 32px;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    font-size: 14px;
    max-width: 280px;
}

.footer-links h4 {
    color: var(--white);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 14px;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .hero-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .terrain-section {
        height: auto;
        min-height: 600px;
    }

    .terrain-content {
        padding: 60px 0;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--gray-200);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .expertise-list {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .terrain-stats {
        flex-direction: column;
        gap: 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}