/* CompliAre Design System
   Enterprise-grade, regulator-safe styling
   ========================================== */

:root {
    /* Colors - Muted, Professional Palette */
    --color-navy: #1a2b4a;
    --color-navy-dark: #0f1a2e;
    --color-charcoal: #2d3748;
    --color-slate: #4a5568;
    --color-blue-muted: #3d5a80;
    --color-blue-light: #5c7caa;
    --color-text: #1a202c;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-subtle: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    
    /* Typography */
    --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.25rem;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-narrow: 900px;
    --nav-height: 72px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-navy);
}

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

ul {
    list-style: none;
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

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

.logo-img {
    height: 36px;
    width: auto;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-slate);
    transition: color var(--transition-fast);
    padding: var(--space-xs) 0;
}

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

.nav-link-cta {
    background: var(--color-navy);
    color: var(--color-bg) !important;
    padding: 0.625rem 1.25rem;
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.nav-link-cta:hover {
    background: var(--color-navy-dark);
}

/* Dropdown */
.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: -1rem;
    min-width: 200px;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    padding: var(--space-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li a {
    display: block;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    color: var(--color-slate);
    transition: all var(--transition-fast);
}

.dropdown li a:hover {
    background: var(--color-bg-subtle);
    color: var(--color-navy);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-navy);
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-4xl);
    min-height: 70vh;
    display: flex;
    align-items: center;
    background: var(--color-bg);
}

.hero-content {
    max-width: 720px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    line-height: 1.5;
    max-width: 600px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--color-navy-dark);
}

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

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

.btn-secondary-light {
    background: transparent;
    color: var(--color-bg);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary-light:hover {
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.1);
}

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

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

.section-dark {
    background: var(--color-navy);
}

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

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-navy);
    letter-spacing: -0.01em;
}

.section-dark .section-title {
    color: var(--color-bg);
}

/* Problem Section */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.problem-card {
    background: var(--color-bg);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
}

.problem-icon {
    color: var(--color-blue-muted);
    margin-bottom: var(--space-md);
}

.problem-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--space-sm);
}

.problem-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

.problem-footer {
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-navy);
    padding-top: var(--space-lg);
}

/* Platform Section */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.platform-card {
    padding: var(--space-xl);
    background: var(--color-bg-light);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    transition: border-color var(--transition-base);
}

.platform-card:hover {
    border-color: var(--color-blue-muted);
}

.platform-icon {
    color: var(--color-blue-muted);
    margin-bottom: var(--space-md);
}

.platform-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--space-sm);
}

.platform-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.5;
}

/* Why Section */
.why-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.why-list {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.why-list li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--font-size-lg);
    color: var(--color-charcoal);
}

.why-list li:last-child {
    border-bottom: none;
}

.why-list svg {
    color: var(--color-blue-muted);
    flex-shrink: 0;
}

.why-footer {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-navy);
    text-align: center;
    padding-top: var(--space-lg);
}

/* Who Section */
.who-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.who-card {
    text-align: center;
    padding: var(--space-xl);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    background: var(--color-bg-light);
}

.who-icon {
    color: var(--color-blue-muted);
    margin-bottom: var(--space-md);
}

.who-card h3 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-charcoal);
    line-height: 1.4;
}

/* Trust Section */
.trust-content {
    text-align: center;
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md) var(--space-xl);
    margin-top: var(--space-xl);
    text-align: left;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-base);
}

.trust-item svg {
    color: var(--color-blue-light);
    flex-shrink: 0;
}

/* CTA Section */
.section-cta {
    background: var(--color-navy);
    text-align: center;
    padding: var(--space-4xl) 0;
}

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

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-bg);
    margin-bottom: var(--space-xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.cta-footer {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

/* Footer */
.footer {
    background: var(--color-bg-subtle);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--color-border-light);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    height: 28px;
    width: auto;
    margin-bottom: var(--space-md);
}

.footer-company {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-charcoal);
    margin-bottom: var(--space-xs);
}

.footer-address {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

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

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

.footer-column ul li {
    margin-bottom: var(--space-xs);
}

.footer-column a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-navy);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-social {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-social:hover {
    color: var(--color-navy);
}

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

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-3xl: 1.75rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-lg);
        gap: 0;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-item {
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .nav-link {
        display: block;
        padding: var(--space-md) 0;
        font-size: var(--font-size-base);
    }
    
    .nav-link-cta {
        margin-top: var(--space-md);
        text-align: center;
    }
    
    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: var(--space-md);
    }
    
    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-xl);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .who-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--space-lg); }