/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
    /* Colors */
    --color-primary: #1a365d;
    --color-primary-dark: #0f2440;
    --color-primary-light: #2a5298;
    --color-accent: #c8a951;
    --color-accent-dark: #b08d30;

    --color-text: #1a202c;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;

    --color-bg: #ffffff;
    --color-bg-alt: #f7f8fc;
    --color-bg-dark: #1a202c;

    --color-border: #e2e8f0;
    --color-white: #ffffff;
    --color-success: #38a169;
    --color-error: #e53e3e;

    /* Typography */
    --font-heading: 'Merriweather', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    --leading-tight: 1.2;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Header */
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

a:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: var(--leading-tight);
    color: var(--color-primary);
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    z-index: 1000;
    font-weight: 600;
}

.skip-link:focus {
    top: var(--space-md);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section {
    padding: var(--space-4xl) 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header h2 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Two Column Layout */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.two-column.reverse .column-media {
    order: -1;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.logo-name {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-light);
    letter-spacing: 0.02em;
}

.nav-menu {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-base);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

/* Hamburger active state */
.nav-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-4xl) 0;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: var(--text-5xl);
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-2xl);
    line-height: var(--leading-relaxed);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Page Hero (inner pages) */
.page-hero {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-3xl) 0;
    text-align: center;
}

.page-hero h1 {
    font-size: var(--text-4xl);
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.85);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    text-decoration: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-primary-dark);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: var(--text-base);
}

/* ==========================================================================
   Cards
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-2xl);
    text-align: center;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.service-icon {
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.service-card h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    min-height: 1.5em;
}

.card-link {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-link:hover {
    color: var(--color-accent);
}

/* ==========================================================================
   Features / Values Grid
   ========================================================================== */
.features-grid,
.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
}

.feature,
.value-item {
    padding: var(--space-xl);
}

.feature h3,
.value-item h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

.feature p,
.value-item p {
    color: var(--color-text-light);
    min-height: 1.5em;
}

/* ==========================================================================
   Process Steps
   ========================================================================== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    text-align: center;
}

.step {
    padding: var(--space-xl);
}

.step-number {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.step h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
}

.step p {
    color: var(--color-text-light);
    font-size: var(--text-sm);
    min-height: 1.5em;
}

/* ==========================================================================
   Team
   ========================================================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
}

.team-card {
    text-align: center;
}

.team-photo {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin: 0 auto var(--space-lg);
}

.team-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-xs);
}

.team-role {
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.team-bio {
    color: var(--color-text-light);
    font-size: var(--text-sm);
}

/* ==========================================================================
   Project Cards
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.project-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-2xl);
    transition: box-shadow var(--transition-base);
}

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

.project-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-xs);
}

.project-client {
    color: var(--color-accent);
    font-weight: 600;
    font-size: var(--text-sm);
    margin-bottom: var(--space-md);
}

.project-card p:last-child {
    color: var(--color-text-light);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-section {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--text-3xl);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta-content p {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-2xl);
}

/* ==========================================================================
   Contact Form
   ========================================================================== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: var(--space-3xl);
    align-items: start;
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: var(--text-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.15);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--color-error);
}

.form-error {
    display: block;
    color: var(--color-error);
    font-size: var(--text-xs);
    margin-top: var(--space-xs);
    min-height: 1em;
}

.form-success {
    background-color: var(--color-success);
    color: var(--color-white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
}

/* Contact Info Sidebar */
.contact-info {
    background-color: var(--color-bg-alt);
    padding: var(--space-2xl);
    border-radius: var(--radius-md);
}

.contact-info-item {
    margin-bottom: var(--space-xl);
}

.contact-info-item:last-child {
    margin-bottom: 0;
}

.contact-info-item h3 {
    font-size: var(--text-base);
    margin-bottom: var(--space-xs);
}

.contact-info-item p {
    color: var(--color-text-light);
    font-size: var(--text-sm);
}

.contact-info-item a {
    color: var(--color-primary-light);
}

/* ==========================================================================
   Service Features List
   ========================================================================== */
.service-features {
    margin-top: var(--space-lg);
}

.service-features li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text-light);
    min-height: 1.5em;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* ==========================================================================
   Service Areas
   ========================================================================== */
.areas-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
    max-width: 700px;
    margin: 0 auto;
}

.area-group h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.area-group ul {
    list-style: none;
}

.area-group ul li {
    padding: var(--space-xs) 0;
    color: var(--color-text-light);
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--color-border);
}

.area-group ul li:last-child {
    border-bottom: none;
}

/* ==========================================================================
   Placeholder Image
   ========================================================================== */
.placeholder-image {
    background-color: var(--color-bg-alt);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
}

.headshot {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
    object-fit: cover;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.75);
    padding: var(--space-3xl) 0 var(--space-xl);
}

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

.footer-brand .logo-text {
    color: var(--color-white);
    font-size: var(--text-lg);
}

.footer-company {
    margin-top: var(--space-xs);
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-tagline {
    margin-top: var(--space-sm);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.site-footer h4 {
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.footer-nav ul li {
    margin-bottom: var(--space-sm);
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

.footer-services ul li {
    margin-bottom: var(--space-sm);
}

.footer-services a {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

.footer-contact address {
    font-style: normal;
    font-size: var(--text-sm);
}

.footer-contact p {
    margin-bottom: var(--space-xs);
    min-height: 1.5em;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-xl);
    text-align: center;
    font-size: var(--text-sm);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .areas-list {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
    }

    .logo-name {
        display: none;
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--space-lg) var(--space-xl);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-menu .nav-link {
        padding: var(--space-sm) 0;
    }

    /* Layout */
    .two-column {
        grid-template-columns: 1fr;
    }

    .two-column.reverse .column-media {
        order: 0;
    }

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

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

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

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

    .process-steps {
        grid-template-columns: 1fr 1fr;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .hero {
        min-height: auto;
        padding: var(--space-3xl) 0;
    }

    .container {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 480px) {
    .process-steps {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }
}