:root {
    --primary: #316B55;
    --primary-soft: #EDF5F1;
    --background: #FCFDFC;
    --foreground: #141E1A;
    --muted: #657A72;
    --border: #DCEAE4;
    --card-bg: #FFFFFF;
    --destructive: #E5534B;
    --success: #29A36D;
    
    --radius: 16px;
    --radius-btn: 12px;
    
    /* Refined Premium Shadows */
    --shadow-sm: 0 4px 14px rgba(20, 30, 26, 0.03), 0 1px 3px rgba(20, 30, 26, 0.02);
    --shadow: 0 12px 32px rgba(20, 30, 26, 0.05), 0 2px 8px rgba(20, 30, 26, 0.03);
    --shadow-hover: 0 24px 48px rgba(49, 107, 85, 0.08), 0 8px 16px rgba(49, 107, 85, 0.04);
    
    /* Flowing Easing Functions */
    --ease-out-smooth: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    --transition-fast: 0.25s var(--ease-out-smooth);
    --transition-medium: 0.5s var(--ease-out-smooth);
    --transition-slow: 0.8s var(--ease-out-smooth);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection {
    background-color: var(--primary-soft);
    color: var(--primary);
}

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

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--foreground);
    line-height: 1.3;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-sm {
    max-width: 720px;
    margin: 0 auto;
}

.section {
    padding: 100px 0;
}

.section-bg {
    background-color: var(--primary-soft);
}

.section-header {
    max-width: 680px;
    margin: 0 auto 56px;
    text-align: center;
}

.section-title {
    font-size: 24px;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--muted);
    font-size: 16px;
}

/* Grid & Premium Interactions */
.grid {
    display: grid;
    gap: 24px;
}

@media (min-width: 768px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
    .section-title { font-size: 28px; }
}

@media (min-width: 1024px) {
    .grid { grid-template-columns: repeat(3, 1fr); }
}

/* CARDS */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-medium), border-color var(--transition-medium);
    height: 100%;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, rgba(49, 107, 85, 0.02) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: -1;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    border-color: rgba(49, 107, 85, 0.2);
    /* translateY is handled via 3D tracking in JS, but fallback here */
    transform: translateY(-4px) scale(1.01);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    background-color: var(--primary-soft);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 24px;
    transition: transform var(--transition-spring), background-color var(--transition-fast), color var(--transition-fast);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-4deg);
    background-color: #E2EFE9;
}

.card-title {
    font-size: 18px;
    margin-bottom: 0;
    transition: color var(--transition-fast);
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 15px;
    border-radius: var(--radius-btn);
    padding: 14px 28px;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    text-align: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(49, 107, 85, 0.2);
}

.btn-primary:after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.6s var(--ease-out-smooth);
    z-index: -1;
}

.btn-primary:hover {
    background-color: #265443;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(49, 107, 85, 0.3);
}

.btn-primary:hover:after {
    transform: translateX(0);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background-color: var(--primary-soft);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(49, 107, 85, 0.05);
}

.btn-block {
    display: flex;
    width: 100%;
    padding: 16px 24px;
}

/* NAVBAR (Glassmorphism & Stikiness) */
.navbar {
    border-bottom: 1px solid transparent;
    background-color: transparent;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: background-color var(--transition-medium), padding var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
}

.navbar.scrolled {
    background-color: rgba(252, 253, 252, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
}

/* LOGO Vector */
.logo-container {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-mark {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.logo-text {
    font-weight: 700;
    font-size: 22px;
    color: var(--foreground);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link-icon {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 600;
    color: var(--foreground);
    text-decoration: none;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-link-icon:hover {
    color: var(--primary);
    transform: translateY(-1px);
}

.nav-action {
    padding: 10px 20px;
    font-size: 14px;
}

/* HERO SECTION Header Parallax base */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
}

.hero-title {
    font-size: 38px;
    margin-bottom: 24px;
    max-width: 800px;
    margin-inline: auto;
    will-change: transform;
}

@media (min-width: 768px) {
    .hero-title { font-size: 46px; }
}

.hero-subtitle {
    font-size: 18px;
    color: var(--muted);
    margin-bottom: 40px;
    max-width: 660px;
    margin-inline: auto;
    will-change: transform;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
    will-change: transform;
}

.hero-microtext {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
}

.icon-sm {
    width: 16px;
    height: 16px;
    color: var(--primary);
}

/* About / Vision */
.about .section-desc {
    font-size: 18px;
}

/* Contact Section & Forms */
.contact-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition-medium);
}

.contact-card:hover {
    box-shadow: var(--shadow-hover);
}

@media (min-width: 768px) {
    .contact-card { padding: 48px; }
}

.form-group {
    margin-bottom: 24px;
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 8px;
    transition: color var(--transition-fast);
}

.form-group:focus-within label {
    color: var(--primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
    font-family: inherit;
    font-size: 15px;
    color: var(--foreground);
    background-color: var(--background);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: #bcccd0;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
    transform: translateY(-1px);
}

.contact-subtext {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--muted);
}

/* Loader Animation for Form Submit */
.loader {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}
@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer Element */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0;
    background-color: var(--background);
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

@media (min-width: 768px) {
    .footer-brand {
        align-items: flex-start;
    }
}

.logo-footer {
    transform-origin: center center;
}

.logo-footer .logo-mark {
    width: 22px;
    height: 20px;
    color: var(--muted);
}

.logo-footer .logo-text {
    font-size: 18px;
    color: var(--muted);
}

.footer-tagline {
    font-size: 14px;
    color: var(--muted);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 14px;
    color: var(--muted);
}

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

/* ========================================================================= */
/* PREMIUM REVEAL ANIMATIONS (Intersection Observer) */
/* ========================================================================= */

.fade-up {
    opacity: 0;
    filter: blur(2px);
    transform: translateY(40px) scale(0.98);
    transition: opacity 1s var(--ease-out-smooth), transform 1s var(--ease-out-smooth), filter 1.2s var(--ease-out-smooth);
    will-change: opacity, transform, filter;
}

.fade-up.visible {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
}

/* Staggering delays for beautiful cascading reveals */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Success & Error States for Button */
.btn.success-state {
    background-color: var(--success);
    color: white;
}
.btn.error-state {
    background-color: var(--destructive);
    color: white;
}