/* Root Variables - Cairn Brand System */
:root {
    /* Primary palette */
    --color-obsidian: #101820;
    --color-alpine: #1F5F4A;
    --color-stone: #F4EFE6;
    --color-cloud: #FFFCF5;
    --color-slate: #5D6873;

    /* AI accent palette */
    --color-cyan: #25D0D8;
    --color-violet: #7C3AED;
    --color-amber: #F59E0B;

    /* Gradients */
    --gradient-ai: linear-gradient(135deg, #1F5F4A 0%, #25D0D8 50%, #7C3AED 100%);

    /* Semantic tokens */
    --text-primary: #101820;
    --text-secondary: #5D6873;
    --bg-primary: #F4EFE6;
    --bg-secondary: #FFFCF5;
    --border-color: #E5DDD0;
    --shadow: 0 4px 6px rgba(16, 24, 32, 0.08);
    --shadow-lg: 0 20px 25px rgba(16, 24, 32, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 2px rgba(16, 24, 32, 0.04);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-obsidian);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-alpine);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -0.65rem;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-alpine);
}

/* Hero Section */
.hero {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* Page Header */
.page-header {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 4rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.75rem;
    margin-bottom: 0.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Buttons */
.cta-button {
    display: inline-block;
    background: var(--color-alpine);
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    letter-spacing: 0.3px;
}

.cta-button:hover {
    background: #1a4a38;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.submit-btn {
    background: var(--color-alpine);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    font-size: 0.95rem;
}

.submit-btn:hover {
    background: #1a4a38;
    transform: translateY(-1px);
}

/* Services Section */
.services-preview {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.services-preview h2,
.why-cairn h2 {
    font-size: 2.25rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-primary);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.service-card {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-cyan);
}

.service-card h3 {
    color: var(--color-alpine);
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.view-all {
    display: block;
    text-align: center;
    color: var(--color-alpine);
    text-decoration: none;
    font-weight: 600;
    margin-top: 2rem;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.view-all:hover {
    color: #1a4a38;
}

/* Why Cairn Section */
.why-cairn {
    padding: 5rem 0;
    background: var(--bg-primary);
}

.benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.benefit {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.benefit .number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-alpine);
    margin-bottom: 0.5rem;
}

.benefit .icon {
    display: block;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* Services Detail */
.services-detail {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.service-detail-item {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.service-detail-item:last-child {
    border-bottom: none;
}

.service-detail-item h2 {
    color: var(--color-alpine);
    margin-bottom: 1rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.service-detail-item p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
    font-size: 0.95rem;
}

.service-list {
    list-style: none;
    padding-left: 0;
}

.service-list li {
    padding: 0.5rem 0;
    padding-left: 1.75rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-alpine);
    font-weight: 600;
}

/* About Section */
.about-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.about-content {
    margin-bottom: 3rem;
}

.about-content h2 {
    color: var(--color-alpine);
    margin-bottom: 1rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.about-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.approach-list {
    list-style: none;
    padding-left: 0;
}

.approach-list li {
    padding: 0.75rem 0;
    padding-left: 1.75rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.approach-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-alpine);
    font-weight: 600;
}

.approach-list strong {
    color: var(--text-primary);
}

/* Values Section */
.values-section {
    background: var(--bg-primary);
    padding: 5rem 0;
}

.values-section h2 {
    font-size: 2.25rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.value-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    text-align: center;
}

.value-card h3 {
    color: var(--color-alpine);
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.value-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Contact Section */
.contact-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-form-container h2 {
    color: var(--color-alpine);
    margin-bottom: 2rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-alpine);
    box-shadow: 0 0 0 3px rgba(31, 95, 74, 0.1);
}

.contact-info h2 {
    color: var(--color-alpine);
    margin-bottom: 2rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.info-block {
    margin-bottom: 2rem;
}

.info-block h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.info-block p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.info-block a {
    color: var(--color-alpine);
    text-decoration: none;
    font-weight: 600;
}

.info-block a:hover {
    text-decoration: underline;
}

.expertise-list {
    list-style: none;
    padding-left: 0;
}

.expertise-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* CTA Section */
.cta-section {
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 4rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background: var(--color-obsidian);
    color: var(--bg-primary);
    padding: 2.5rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

footer a {
    color: var(--color-cyan);
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.25rem;
    }

    .page-header h1 {
        font-size: 1.75rem;
    }

    .nav-links {
        gap: 1.5rem;
        font-size: 0.9rem;
    }

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

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

    .services-preview h2,
    .why-cairn h2,
    .cta-section h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .nav-links {
        gap: 0.75rem;
        font-size: 0.8rem;
    }

    .logo {
        font-size: 1.1rem;
    }
}