/* ==========================================================================
   Adventis AS - Corporate Website Styles
   A professional, elegant design for financial software services
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Adventis Brand Palette */
    --color-primary: #1a8fd1;        /* Adventis blue */
    --color-secondary: #1578b3;      /* Darker blue */
    --color-accent: #0d3c5e;         /* Deep navy accent */
    --color-accent-hover: #145a8a;

    --color-text: #1a1a1a;
    --color-text-muted: #5a6270;
    --color-text-light: #8a919c;

    --color-bg: #ffffff;
    --color-bg-alt: #f4f8fb;
    --color-bg-dark: #0d3c5e;

    --color-border: #e5e7eb;
    --color-border-light: #f0f1f3;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Layout */
    --container-max: 1200px;
    --header-height: 80px;

    /* 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 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
}

p {
    margin-bottom: 1rem;
}

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

.highlight {
    color: var(--color-accent);
}

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

section {
    padding: var(--space-3xl) 0;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

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

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--color-primary);
    transition: gap var(--transition-base);
}

.link-arrow::after {
    content: '\2192';
    transition: transform var(--transition-base);
}

.link-arrow:hover {
    gap: 0.75rem;
}

.link-arrow:hover::after {
    transform: translateX(2px);
}

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

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.logo-img {
    height: 50px;
    width: auto;
}

.footer-logo {
    height: 40px;
    margin-bottom: var(--space-sm);
    filter: brightness(0) invert(1);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-base);
}

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

.nav-menu a {
    font-size: 0.9375rem;
    font-weight: 450;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    padding-top: calc(var(--header-height) + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

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

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

.hero-eyebrow {
    display: block;
    font-size: 0.45em;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: 0.25em;
    letter-spacing: 0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    max-width: 540px;
}

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

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.hero-visual {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 50%;
    height: 100%;
    opacity: 0.08;
    pointer-events: none;
}

.grid-pattern {
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--color-primary) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-primary) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* --------------------------------------------------------------------------
   Value Props Section
   -------------------------------------------------------------------------- */
.value-props {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
}

.props-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.prop {
    text-align: center;
    padding: var(--space-lg);
}

.prop-image {
    width: 100%;
    height: 180px;
    margin-bottom: var(--space-md);
    border-radius: 6px;
    overflow: hidden;
}

.prop-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.prop-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

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

.prop p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* --------------------------------------------------------------------------
   About Preview Section
   -------------------------------------------------------------------------- */
.about-preview {
    background-color: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.section-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.about-content h2 {
    margin-bottom: var(--space-md);
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about-content .link-arrow {
    margin-top: var(--space-sm);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background-color: var(--color-bg-alt);
    border-radius: 8px;
}

.about-image {
    border-radius: 8px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

.stat {
    text-align: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
}

.stat:last-child {
    border-bottom: none;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Services Preview Section
   -------------------------------------------------------------------------- */
.services-preview {
    background-color: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    margin-bottom: 0;
}

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

.service-card {
    padding: var(--space-xl);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    transition: all var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.service-card h3 {
    margin-bottom: var(--space-sm);
    position: relative;
    padding-left: var(--space-md);
}

.service-card h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background-color: var(--color-accent);
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

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

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

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

.cta-content h2 {
    color: white;
    margin-bottom: var(--space-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
}

.cta-section .btn-primary {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.cta-section .btn-primary:hover {
    background-color: var(--color-accent-hover);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-2xl) 0 var(--space-lg);
}

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

.footer-brand .logo-text {
    color: white;
    margin-bottom: var(--space-sm);
    display: block;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
}

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

.footer-links ul,
.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-links a,
.footer-contact li {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

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

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

/* --------------------------------------------------------------------------
   Page Layouts
   -------------------------------------------------------------------------- */
.page-header {
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
    background-color: var(--color-bg-alt);
    text-align: center;
}

.page-header h1 {
    margin-bottom: var(--space-sm);
}

.page-header p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.page-content {
    padding: var(--space-2xl) 0;
}

.page-content .container {
    max-width: 800px;
}

/* --------------------------------------------------------------------------
   Services Page
   -------------------------------------------------------------------------- */
.services-page .services-grid {
    grid-template-columns: 1fr;
}

.services-page .service-card {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-lg);
    padding: var(--space-xl);
}

.services-page .service-card h3 {
    padding-left: 0;
}

.services-page .service-card h3::before {
    display: none;
}

/* --------------------------------------------------------------------------
   Contact Page
   -------------------------------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-info h3 {
    margin-bottom: var(--space-md);
}

.contact-info p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.contact-item svg {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-form {
    background-color: var(--color-bg-alt);
    padding: var(--space-xl);
    border-radius: 8px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-bg);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */
.about-section {
    padding: var(--space-2xl) 0;
}

.about-section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-intro p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.value-item {
    padding: var(--space-lg);
    background-color: var(--color-bg);
    border-radius: 6px;
    border: 1px solid var(--color-border-light);
}

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

.value-item p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

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

    .stat {
        border-bottom: none;
        border-right: 1px solid var(--color-border-light);
    }

    .stat:last-child {
        border-right: none;
    }

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

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

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    section {
        padding: var(--space-2xl) 0;
    }

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

    .hero-image {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: flex-start;
        padding-top: var(--space-xl);
        gap: var(--space-md);
        background-color: var(--color-bg);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu a {
        font-size: 1.125rem;
    }

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

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

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

    .stat {
        border-right: none;
        border-bottom: 1px solid var(--color-border-light);
    }

    .stat:last-child {
        border-bottom: none;
    }

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

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

    .footer-brand {
        grid-column: span 1;
    }

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

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

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

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