/* ============================================
   Pupau Local - AI Sovereignty Platform
   Design System & Styles
   ============================================ */

/* === ROOT VARIABLES === */
:root {
    /* Color Palette - Tech B2B */
    --color-navy: #0a1628;
    --color-navy-light: #1a2942;
    --color-blue: #2563eb;
    --color-blue-light: #3b82f6;
    --color-blue-dark: #1e40af;
    --color-green: #10b981;
    --color-green-light: #34d399;
    --color-red: #ef4444;
    --color-orange: #f59e0b;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-base: 16px;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Container */
    --container-max-width: 1280px;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-navy);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-600);
    font-size: 1.0625rem;
}

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

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

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

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

/* === HEADER & NAVIGATION === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}

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

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    min-height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
}

.nav-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-brand-text {
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-navy);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

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

.nav-link-cta {
    background: linear-gradient(135deg, var(--color-blue), var(--color-blue-light));
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-link-cta:hover {
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* === HERO SECTION === */
.hero {
    margin-top: 70px;
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.2), transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(16, 185, 129, 0.15), transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.02em;
}

.hero-highlight {
    background: linear-gradient(135deg, var(--color-blue-light), var(--color-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-stat {
    text-align: center;
}

.hero-stat-number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-green-light);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-blue), var(--color-blue-light));
    color: var(--color-white);
    border-color: transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: var(--color-white);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.0625rem;
}

.btn-full {
    width: 100%;
}

/* === SECTION HEADER === */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
}

/* === AI SOVEREIGNTY SECTION === */
.sovereignty {
    background-color: var(--color-gray-50);
}

.sovereignty-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.sovereignty-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.sovereignty-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.sovereignty-title {
    font-size: 1.25rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.sovereignty-text {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* === ARCHITECTURE SECTION === */
.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.architecture-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.architecture-card:hover {
    border-color: var(--color-blue);
    transform: translateY(-2px);
}

.architecture-number {
    font-size: 2rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-blue);
    opacity: 0.3;
    margin-bottom: var(--spacing-sm);
}

.architecture-title {
    font-size: 1.25rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.architecture-list {
    list-style: none;
    padding: 0;
}

.architecture-list li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
    color: var(--color-gray-600);
}

.architecture-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: var(--font-weight-bold);
}

/* === USE CASES SECTION === */
.use-cases {
    background-color: var(--color-gray-50);
}

.use-cases-tabs {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-white);
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--color-blue);
    color: var(--color-blue);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--color-blue), var(--color-blue-light));
    color: var(--color-white);
    border-color: transparent;
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-base);
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.use-case-card {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.use-case-featured {
    border: 2px solid var(--color-blue);
}

.use-case-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-blue), var(--color-blue-light));
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
}

.use-case-title {
    font-size: 1.5rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.use-case-meta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.use-case-sector,
.use-case-deployment {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.use-case-deployment {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.use-case-description {
    font-size: 1.0625rem;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.use-case-details {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.use-case-detail-section h4 {
    font-size: 1.125rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.use-case-detail-section ul,
.use-case-detail-section ol {
    margin-left: var(--spacing-lg);
    color: var(--color-gray-600);
}

.use-case-detail-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.use-case-detail-section strong {
    color: var(--color-navy);
    font-weight: var(--font-weight-semibold);
}

.use-case-channels,
.use-case-reparto,
.use-case-integration {
    padding: var(--spacing-md);
    background-color: var(--color-gray-50);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-blue);
    font-size: 0.9375rem;
}

.use-case-channels strong,
.use-case-reparto strong,
.use-case-integration strong {
    color: var(--color-navy);
    font-weight: var(--font-weight-semibold);
}

/* === COMPARISON SECTION === */
.comparison {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.comparison .section-title,
.comparison .section-subtitle {
    color: var(--color-white);
}

.comparison-intro {
    margin-top: var(--spacing-md);
    font-size: 1rem;
    color: var(--color-gray-300);
    font-style: italic;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--color-navy-light), var(--color-navy));
}

.comparison-table th {
    padding: var(--spacing-lg);
    text-align: left;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    font-size: 1.125rem;
}

.comparison-table tbody tr {
    border-bottom: 1px solid var(--color-gray-200);
    transition: background-color var(--transition-fast);
}

.comparison-table tbody tr:hover {
    background-color: var(--color-gray-50);
}

.comparison-table td {
    padding: var(--spacing-lg);
    color: var(--color-gray-700);
}

.comparison-table td:first-child {
    font-weight: var(--font-weight-semibold);
    color: var(--color-navy);
}

.comparison-cloud {
    background-color: rgba(239, 68, 68, 0.05);
}

.comparison-local {
    background-color: rgba(16, 185, 129, 0.05);
}

.comparison-table small {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.comparison-cta {
    text-align: center;
    padding: var(--spacing-2xl);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
}

.comparison-cta-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-300);
}

.comparison-cta-text strong {
    color: var(--color-white);
}

/* === COMPLIANCE SECTION === */
.compliance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.compliance-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.compliance-card:hover {
    border-color: var(--color-green);
    transform: translateY(-4px);
}

.compliance-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-green), var(--color-green-light));
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-bold);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.compliance-title {
    font-size: 1.25rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.compliance-text {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.compliance-list {
    list-style: none;
    padding: 0;
}

.compliance-list li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    position: relative;
    color: var(--color-gray-600);
}

.compliance-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: var(--font-weight-bold);
}

/* === INTEGRATIONS SECTION === */
.integrations {
    background-color: var(--color-gray-50);
}

.integrations-categories {
    display: grid;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.integration-category {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.integration-category-title {
    font-size: 1.25rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.integration-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.integration-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.integration-tag:hover {
    background-color: var(--color-blue);
    color: var(--color-white);
    transform: translateY(-2px);
}

.integrations-cta {
    text-align: center;
    padding: var(--spacing-2xl);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.integrations-cta-text {
    font-size: 1.125rem;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
}

/* === CONTACT SECTION === */
.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-form {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-navy);
    font-size: 0.9375rem;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

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

.form-checkbox-label {
    display: flex;
    align-items: start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.9375rem;
    color: var(--color-gray-600);
}

.form-checkbox-label input[type="checkbox"] {
    margin-top: 3px;
    cursor: pointer;
}

.form-link {
    color: var(--color-blue);
    text-decoration: underline;
}

.form-success {
    padding: var(--spacing-md);
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-green);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.form-error {
    padding: var(--spacing-md);
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-red);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.contact-info {
    background-color: var(--color-gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
}

.contact-info-title {
    font-size: 1.25rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
}

.contact-info-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-info-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-info-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.contact-info-value {
    font-weight: var(--font-weight-semibold);
    color: var(--color-navy);
}

/* === FOOTER === */
.footer {
    background-color: var(--color-navy);
    color: var(--color-gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.footer-brand-text {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
}

.footer-description {
    color: var(--color-gray-400);
    line-height: 1.6;
}

.footer-title {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

.footer-copyright a {
    color: var(--color-blue-light);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social-link {
    font-size: 1.5rem;
    color: var(--color-gray-400);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-social-link:hover {
    color: var(--color-white);
    transform: translateY(-2px);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-2xl) 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link-cta {
        width: 100%;
        text-align: center;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
    }
    
    .sovereignty-grid,
    .architecture-grid,
    .compliance-grid {
        grid-template-columns: 1fr;
    }
    
    .use-cases-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .comparison-table {
        font-size: 0.875rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm);
    }
    
    .nav-logo {
        height: 36px;
    }
    
    .footer-logo {
        height: 32px;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 15px;
    }
    
    .hero-stat-number {
        font-size: 2.5rem;
    }
    
    .use-case-card {
        padding: var(--spacing-lg);
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .nav-logo {
        height: 32px;
    }
    
    .nav-brand-text {
        font-size: 1.125rem;
    }
}

/* === ANIMATIONS === */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    animation: slideInUp var(--transition-slow) forwards;
}

/* === UTILITIES === */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

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

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: 2px;
}