/* GroundSpring — Base Styles */
:root {
    /* Primary Colors */
    --clr-blue: #274c84;
    --clr-green: #438e52;
    
    /* Secondary & Neutrals */
    --clr-navy: #1a2740;
    --clr-off-white: #f5f6f8;
    --clr-cool-gray: #dce1ea;
    --clr-amber: #e8b84b;
    --clr-terracotta: #e07b5a;
    --clr-cream: #f9f4ec;
    
    /* Derived Tints */
    --clr-sky-tint: #ecf2f9;
    --clr-mint-tint: #f0f7f1;
    
    /* Typography */
    --ff-primary: 'Poppins', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    
    /* Transitions */
    --transition-base: all 0.3s ease;
}

/* Base Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

body, h1, h2, h3, h4, p, ul, figure, blockquote {
    margin: 0;
    padding: 0;
}

p {
    margin-bottom: 1.5rem;
}

p:last-child {
    margin-bottom: 0;
}

ul {
    list-style: none;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font: inherit;
}

/* Global Styles */
body {
    font-family: var(--ff-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--clr-navy);
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography Helpers */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3, .h3 { font-size: 1.75rem; }

.lead {
    font-size: 1.25rem;
    color: #4b5563; /* Accessible gray */
    max-width: 65ch;
}

.bg-alt { background-color: var(--clr-off-white); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    font-weight: 700;
    text-align: center;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--clr-blue);
    color: #ffffff;
}

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

.btn-secondary {
    border-color: var(--clr-blue);
    color: var(--clr-blue);
}

.btn-secondary:hover {
    background-color: var(--clr-sky-tint);
}

.btn-accent {
    background-color: var(--clr-amber);
    color: var(--clr-navy);
}

/* Header */
#main-header {
    background: #ffffff;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

#main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--clr-blue);
    display: flex;
    align-items: center;
}

.logo span {
    color: var(--clr-green);
}

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

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

.nav-links a.active {
    color: var(--clr-blue);
    position: relative;
}

.nav-links a.active.btn-primary {
    color: #ffffff;
    background-color: var(--clr-navy);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--clr-green);
    z-index: 10;
}

.nav-links a.active.btn-primary::after {
    bottom: 8px;
    width: 60%;
    left: 20%;
    background-color: var(--clr-green);
    height: 3px;
}

/* Hero Section */
.hero {
    padding: var(--space-lg) 0;
    background: linear-gradient(135deg, #ffffff 0%, var(--clr-sky-tint) 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.hero-text h1 span {
    color: var(--clr-green);
    position: relative;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-top: var(--space-md);
}

.hero-visual {
    position: relative;
}

.visual-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--clr-cool-gray);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.abstract-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--clr-blue);
    top: -50px;
    right: -50px;
    opacity: 0.3;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: var(--clr-green);
    bottom: -50px;
    left: -50px;
    opacity: 0.3;
}

/* Mission Section */
.mission {
    padding: var(--space-lg) 0;
}

.mission-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    background: #ffffff;
    padding: var(--space-md);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.mission-item {
    flex: 1;
}

.mission-arrow {
    color: var(--clr-amber);
    display: flex;
    align-items: center;
}

/* Services Brief */
.services-brief {
    padding: var(--space-lg) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.tag {
    display: inline-block;
    padding: 0.2rem 1rem;
    background: var(--clr-mint-tint);
    color: var(--clr-green);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 100px;
    margin-bottom: 1rem;
}

.grid-three {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.card {
    background: #ffffff;
    padding: var(--space-md);
    border-radius: 12px;
    transition: var(--transition-base);
    border: 1px solid var(--clr-cool-gray);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border-color: var(--clr-blue);
}

/* Methodology Tiles */
.methodology-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin: var(--space-lg) 0 var(--space-md);
}

.real-tile {
    background: #ffffff;
    padding: 2.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    border: 1px solid var(--clr-cool-gray);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.tile-header {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
}

.tile-letter {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.real-tile h3 {
    margin-bottom: 0;
    font-size: 1.5rem;
}

.real-tile p {
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.6;
}

.real-tile:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

/* Specific Tile Theming */
.tile-r { border-top: 6px solid var(--clr-blue); }
.tile-r .tile-letter { color: var(--clr-blue); }

.tile-e { border-top: 6px solid var(--clr-green); }
.tile-e .tile-letter { color: var(--clr-green); }

.tile-a { border-top: 6px solid var(--clr-amber); }
.tile-a .tile-letter { color: var(--clr-amber); }

.tile-l { border-top: 6px solid var(--clr-terracotta); }
.tile-l .tile-letter { color: var(--clr-terracotta); }

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-md);
}

.testimonial-card {
    background: #ffffff;
    border-left: 6px solid var(--clr-green);
    padding: 2.5rem;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.testimonial-card p {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.testimonial-card cite {
    font-style: normal;
    display: block;
    line-height: 1.4;
}

.testimonial-card cite strong {
    font-size: 1.1rem;
    color: var(--clr-blue);
    display: block;
    margin-bottom: 0.25rem;
}

.testimonial-card cite span {
    font-size: 0.875rem;
    color: #6b7280;
}

.copy-section p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.fade-in {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.card-icon {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--clr-green);
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Footer */
#main-footer {
    background: var(--clr-navy);
    color: var(--clr-off-white);
    padding: var(--space-lg) 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-brand .logo {
    color: #ffffff;
    margin-bottom: 1.5rem;
}

.footer-brand p {
    color: var(--clr-cool-gray);
    max-width: 30ch;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--clr-green);
    transform: translateY(-3px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.footer-links h4, .footer-contact h4 {
    color: #ffffff;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.1em;
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

.footer-links a:hover {
    color: var(--clr-green);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.875rem;
    color: var(--clr-cool-gray);
    display: flex;
    justify-content: space-between;
}

.footer-bottom a:hover {
    color: #ffffff;
}

.grid-two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

@media (max-width: 992px) {
    .grid-two {
        grid-template-columns: 1fr;
        gap: var(--space-md);
        text-align: center;
    }
    
    .grid-two .visual-portrait {
        order: -1; /* Image above text on mobile */
        max-width: 500px;
        margin: 0 auto;
    }
}

.visual-portrait {
    aspect-ratio: 4/3;
    border-radius: 12px;
    overflow: hidden;
    background: var(--clr-cool-gray);
}

.visual-portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Mobile Nav */
.mobile-nav-toggle {
    display: none;
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        padding: var(--space-md) 0 var(--space-lg);
        min-height: auto;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-md);
    }
    
    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        max-width: 400px;
        margin: 0 auto;
        width: 100%;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 2rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        z-index: 1000;
        gap: 1.5rem;
        text-align: center;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease-out forwards;
    }

    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }
    
    .mobile-nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 6px;
        z-index: 1001;
        padding: 0.5rem;
    }
    
    .mobile-nav-toggle .bar {
        width: 30px;
        height: 3px;
        background-color: var(--clr-blue);
        border-radius: 2px;
        transition: var(--transition-base);
    }

    /* Hamburger Animation */
    .mobile-nav-toggle.open .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    .mobile-nav-toggle.open .bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-nav-toggle.open .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
    
    .mission-grid {
        flex-direction: column;
        text-align: center;
    }
    
    .mission-arrow {
        transform: rotate(90deg);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}