/* =====================================================
   Vexion - AI Integration Consulting
   Professional Website Styles
   ===================================================== */

/* CSS Variables */
:root {
    /* Colors - Professional, Trust-inspiring palette */
    --color-primary: #1a365d;
    --color-primary-light: #2c5282;
    --color-primary-dark: #0f2744;
    --color-accent: #3182ce;
    --color-accent-light: #4299e1;
    --color-gold: #d69e2e;
    --color-gold-light: #ecc94b;

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

    --color-bg: #ffffff;
    --color-bg-alt: #f7fafc;
    --color-bg-dark: #0f2744;

    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

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

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

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

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    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: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

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

/* Utility Classes */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(49, 130, 206, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(49, 130, 206, 0.5);
}

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

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.logo-icon {
    color: var(--color-accent);
    font-size: 1.5rem;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: 0.625rem 1.25rem;
    background: var(--color-primary);
    color: white !important;
    border-radius: var(--radius-md);
}

.nav-cta:hover {
    background: var(--color-primary-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(80px + var(--space-2xl)) 0 var(--space-xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(247, 250, 252, 1) 0%,
        rgba(237, 242, 247, 1) 50%,
        rgba(226, 232, 240, 0.5) 100%);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 25% 25%, rgba(49, 130, 206, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(214, 158, 46, 0.03) 0%, transparent 50%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.hero-content {
    text-align: left;
    max-width: 600px;
}

.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(49, 130, 206, 0.15));
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(49, 130, 206, 0.1);
    color: var(--color-accent);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 50px;
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 0 var(--space-xl);
    color: var(--color-text-light);
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* Section Styles */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(49, 130, 206, 0.1);
    color: var(--color-accent);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 50px;
    margin-bottom: var(--space-sm);
}

.section-title {
    margin-bottom: var(--space-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
}

/* Problem Section */
.problem-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

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

.problem-card {
    padding: var(--space-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

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

.problem-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
    color: white;
    font-size: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.problem-card h3 {
    margin-bottom: var(--space-xs);
}

/* Services Section */
.services-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-alt);
}

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

.service-card {
    position: relative;
    padding: var(--space-xl);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-gold) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.service-card.featured {
    grid-row: span 2;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.service-card.featured h3,
.service-card.featured p {
    color: white;
}

.service-card.featured p {
    opacity: 0.9;
}

.service-card.featured::before {
    opacity: 1;
    background: var(--color-gold);
}

.service-number {
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.1;
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    line-height: 1;
}

.service-card.featured .service-number {
    opacity: 0.2;
}

.service-card h3 {
    margin-bottom: var(--space-sm);
}

.service-features {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
}

.service-card.featured .service-features {
    border-top-color: rgba(255, 255, 255, 0.2);
}

.service-features li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
    color: var(--color-text-light);
}

.service-card.featured .service-features li {
    color: rgba(255, 255, 255, 0.85);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

.service-card.featured .service-features li::before {
    color: var(--color-gold);
}

/* Approach Section */
.approach-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.approach-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.approach-text .section-tag {
    margin-bottom: var(--space-sm);
}

.approach-text .section-title {
    text-align: left;
    margin-bottom: var(--space-md);
}

.approach-text > p {
    margin-bottom: var(--space-xl);
}

.approach-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.approach-step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: white;
    font-weight: 600;
    border-radius: 50%;
}

.step-content h4 {
    margin-bottom: 0.25rem;
}

.step-content p {
    font-size: 0.9375rem;
}

.approach-visual {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.visual-card {
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.visual-card:hover {
    transform: translateX(8px);
    border-color: var(--color-accent);
}

.visual-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.visual-card h4 {
    margin-bottom: 0.25rem;
}

.visual-card p {
    font-size: 0.9375rem;
    margin: 0;
}

/* Insights Section */
.insights-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.insights-section .section-tag {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.insights-section .section-title {
    color: white;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.insight-card {
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: all var(--transition-base);
}

.insight-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.insight-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.insight-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9375rem;
    margin-bottom: var(--space-sm);
}

.insight-source {
    display: block;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Blog Section */
.blog-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-alt);
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.blog-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

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

.blog-card.featured-post {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.blog-image {
    position: relative;
    min-height: 200px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    display: flex;
    align-items: flex-end;
    padding: var(--space-md);
}

.blog-category {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: white;
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.blog-content {
    padding: var(--space-lg);
}

.blog-date {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.blog-card h3 {
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.blog-card h3:hover {
    color: var(--color-accent);
}

.blog-card h3 a {
    color: inherit;
}

.blog-card h3 a:hover {
    color: var(--color-accent);
}

.blog-link {
    display: inline-block;
    margin-top: var(--space-sm);
    font-weight: 500;
    color: var(--color-accent);
}

.blog-link:hover {
    text-decoration: underline;
}

.blog-cta {
    text-align: center;
    margin-top: var(--space-xl);
}

/* CTA Section */
.cta-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    margin-bottom: var(--space-sm);
}

.cta-content > p {
    margin-bottom: var(--space-xl);
}

.contact-form {
    text-align: left;
    background: var(--color-bg-alt);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    margin-top: var(--space-sm);
}

/* Footer */
.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    background: var(--color-bg-dark);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .nav-logo {
    color: white;
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    max-width: 300px;
}

.footer-links h4 {
    color: white;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

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

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

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        padding: 80px var(--space-lg) var(--space-lg);
        background: var(--color-bg);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero {
        min-height: auto;
        padding-top: calc(80px + var(--space-2xl));
        padding-bottom: var(--space-2xl);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        text-align: center;
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-illustration {
        order: -1;
        margin-bottom: var(--space-lg);
    }

    .hero-illustration img {
        max-width: 350px;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }

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

    .service-card.featured {
        grid-row: auto;
    }

    .blog-card.featured-post {
        grid-column: auto;
        display: block;
    }

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

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-group.full-width {
        grid-column: auto;
    }

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

    .footer-brand {
        grid-column: auto;
    }

    .footer-brand p {
        max-width: none;
    }
}

@media (max-width: 480px) {
    :root {
        --space-3xl: 4rem;
        --space-2xl: 3rem;
    }

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

    .btn {
        width: 100%;
    }
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-cta { animation-delay: 0.4s; }
.hero-stats { animation-delay: 0.5s; }

.hero-illustration {
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-illustration img {
    animation: float 6s ease-in-out infinite;
}