/* CSS Variables */
:root {
    --color-primary: #1e3a5f;
    --color-primary-dark: #152a45;
    --color-accent: #2d6a9f;
    --color-accent-light: #3d7ab0;
    --color-text: #1a1a2e;
    --color-text-light: #4a4a5a;
    --color-text-muted: #6b6b7b;
    --color-background: #ffffff;
    --color-background-alt: #f8f9fb;
    --color-border: #e2e4e8;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-primary: #6ba3d6;
    --color-primary-dark: #4a8bc4;
    --color-accent: #7bb8e8;
    --color-accent-light: #9dcbf2;
    --color-text: #e8eaed;
    --color-text-light: #b8bcc4;
    --color-text-muted: #8a8f9a;
    --color-background: #121820;
    --color-background-alt: #1a222d;
    --color-border: #2d3a4a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

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

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

h1 {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.section-intro {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--color-accent-light);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 106, 159, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-nav {
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.nav {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-background-alt) 0%, #ffffff 100%);
    padding: 120px var(--spacing-md) var(--spacing-2xl);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-tagline {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* About */
.about {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-background);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.philosophy {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.philosophy h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.philosophy p {
    color: var(--color-text-light);
}

.credentials {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.credential h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.credential p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.about-stats {
    display: grid;
    gap: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-xl);
    border-radius: 12px;
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Services */
.services {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-background-alt);
}

.services h2 {
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-background);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

.service-icon {
    width: 56px;
    height: 56px;
    background-color: var(--color-background-alt);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.service-card h3 {
    color: var(--color-primary);
}

.service-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.service-card-large {
    padding: var(--spacing-xl);
}

.service-description {
    margin-bottom: var(--spacing-md) !important;
}

.service-deliverables {
    list-style: none;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.service-deliverables li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

.service-deliverables li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

.service-deliverables li:last-child {
    margin-bottom: 0;
}

/* Experience */
.experience {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-background);
}

.experience h2 {
    text-align: center;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.experience-card {
    background-color: var(--color-background-alt);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.experience-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-duration {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.experience-highlights {
    list-style: none;
}

.experience-highlights li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

.experience-highlights li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* Results */
.results {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-background);
}

.results h2 {
    text-align: center;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.result-card {
    background-color: var(--color-background-alt);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.result-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.result-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.result-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.5;
    margin-bottom: 0;
}

.recognition {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 12px;
}

.recognition h3 {
    color: #ffffff;
    margin-bottom: var(--spacing-md);
}

.recognition p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* CTA Section */
.cta {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    text-align: center;
}

.cta h2 {
    color: #ffffff;
    margin-bottom: var(--spacing-sm);
}

.cta p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

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

.cta .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

/* Contact */
.contact {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-background-alt);
}

.contact h2 {
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-item p,
.contact-item a {
    color: var(--color-text-light);
    margin-bottom: 0;
}

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

.contact-note {
    font-size: 0.875rem;
    color: var(--color-text-muted) !important;
    margin-top: var(--spacing-xs);
}

.ideal-engagements {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.ideal-engagements h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.ideal-engagements p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.ideal-engagements p:last-child {
    margin-bottom: 0;
}

.linkedin-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-accent);
    font-weight: 500;
}

.linkedin-link:hover {
    color: var(--color-primary);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    background-color: var(--color-primary-dark);
    text-align: center;
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Responsive */
@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-background);
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        gap: var(--spacing-sm);
    }

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

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding-top: 100px;
        min-height: auto;
        padding-bottom: var(--spacing-xl);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }

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

    .about-stats {
        grid-template-columns: 1fr;
    }

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

    .contact-info {
        text-align: center;
    }

    .ideal-engagements {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .stat-number {
        font-size: 2.5rem;
    }

    .result-number {
        font-size: 2rem;
    }
}

/* Dark Mode Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--color-background-alt);
    color: var(--color-accent);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

/* Dark Mode Specific Overrides */
[data-theme="dark"] .header {
    background-color: rgba(18, 24, 32, 0.98);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, var(--color-background-alt) 0%, var(--color-background) 100%);
}

[data-theme="dark"] .btn-primary {
    color: #121820;
}

[data-theme="dark"] .btn-secondary {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: var(--color-accent);
    color: #121820;
}

[data-theme="dark"] .service-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .result-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .cta .btn-primary {
    background-color: var(--color-accent);
    color: #121820;
}

[data-theme="dark"] .cta .btn-primary:hover {
    background-color: var(--color-accent-light);
}

@media (max-width: 768px) {
    .theme-toggle {
        order: -1;
        margin-right: auto;
        margin-left: var(--spacing-sm);
    }
}