/* Zero Friction Foundation - Brand Identity CSS */
/* Based on brand-identity.md specifications */

/* CSS Custom Properties (Brand Colors) */
:root {
    /* Primary Colors */
    --foundation-blue: #0B1F33;
    --neutral-white: #FFFFFF;
    
    /* Secondary Colors */
    --structural-gray: #6B7280;
    --signal-teal: #1FA3A3;
    
    /* Additional Colors for UI */
    --background-gray: #F3F4F6;
    --border-gray: #E5E7EB;
    --text-dark: #111827;
    --text-light: #374151;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--neutral-white);
}

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

a:hover {
    color: var(--signal-teal);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--foundation-blue);
}

h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-light);
}

/* Header */
.header {
    background-color: var(--foundation-blue);
    color: var(--neutral-white);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-symbol {
    width: 40px;
    height: 40px;
    background-color: var(--signal-teal);
    color: var(--neutral-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 8px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.logo-subtitle {
    font-size: 0.875rem;
    opacity: 0.8;
    font-weight: 400;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--neutral-white);
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: 6px;
    transition: background-color var(--transition-fast);
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

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

.hero-title {
    font-size: 3.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--foundation-blue);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

.hero-hint {
    font-size: 0.875rem;
    color: var(--structural-gray);
    margin-top: var(--spacing-md);
    font-style: italic;
    opacity: 0.8;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background-color: #0a1a2a;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--foundation-blue);
    color: var(--neutral-white);
    transform: translateY(-1px);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Principles Section */
.principles {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-gray);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.principle-card {
    background: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    border: 1px solid var(--border-gray);
}

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

.principle-icon {
    width: 48px;
    height: 48px;
    background-color: var(--signal-teal);
    color: var(--neutral-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.principle-card h3 {
    margin-bottom: var(--spacing-sm);
}

/* Architecture Section */
.architecture {
    padding: var(--spacing-xxl) 0;
    background-color: var(--neutral-white);
}

.architecture-diagram {
    display: grid;
    grid-template-rows: repeat(4, 1fr);
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.layer {
    background: var(--foundation-blue);
    color: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.layer::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--foundation-blue);
}

.layer-1 { grid-row: 1; }
.layer-2 { grid-row: 2; }
.layer-3 { grid-row: 3; }
.layer-4 { grid-row: 4; }

.layer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
}

.layer-description {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
}

.layer-icon {
    align-self: flex-end;
    font-size: 1.5rem;
    opacity: 0.8;
}

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

.feature {
    background: var(--background-gray);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border-gray);
}

.feature h3 {
    margin-top: 0;
}

.feature ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-gray);
}

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

.feature li::before {
    content: '✓';
    color: var(--signal-teal);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

/* Vision Section */
.vision {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-gray);
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.vision-card {
    background: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-gray);
    transition: transform var(--transition-fast);
}

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

/* Projects Section */
.projects {
    padding: var(--spacing-xxl) 0;
    background-color: var(--neutral-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--foundation-blue);
    color: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

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

.project-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.project-card h3 {
    margin-bottom: var(--spacing-sm);
}

/* Community Section */
.community {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-gray);
}

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

.community-info h3 {
    color: var(--foundation-blue);
    margin-bottom: var(--spacing-sm);
}

.community-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.stat {
    background: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-gray);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--foundation-blue);
    margin-bottom: var(--spacing-sm);
}

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

/* Get Involved Section */
.get-involved {
    padding: var(--spacing-xxl) 0;
    background-color: var(--neutral-white);
}

.involved-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.involved-card {
    background: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-gray);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    text-align: center;
}

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

.involved-icon {
    width: 64px;
    height: 64px;
    background-color: var(--signal-teal);
    color: var(--neutral-white);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.5rem;
}

.involved-card h3 {
    margin-bottom: var(--spacing-sm);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--foundation-blue);
    font-weight: 600;
    margin-top: var(--spacing-md);
    text-decoration: none;
}

.card-link:hover {
    color: var(--signal-teal);
}

/* Transparency Section */
.transparency {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-gray);
}

.transparency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.transparency-card {
    background: var(--neutral-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-gray);
    transition: transform var(--transition-fast);
}

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

.transparency-card h3 {
    color: var(--foundation-blue);
    margin-bottom: var(--spacing-sm);
}

/* Footer */
.footer {
    background-color: var(--foundation-blue);
    color: var(--neutral-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--neutral-white);
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

.footer-social a {
    color: var(--neutral-white);
    background: rgba(255, 255, 255, 0.1);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--signal-teal);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* Icons */
.fa, .fab {
    font-size: 1.125rem;
}

/* Responsive Design */
/* Hamburger Menu Button - Hidden by default (desktop) */
.menu-toggle {
    display: none !important;
    background: transparent;
    border: none;
    color: var(--neutral-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: 110;
    transition: color var(--transition-fast);
}

@media (max-width: 768px) {
    .header-content {
        padding: var(--spacing-sm) 0;
        gap: var(--spacing-xs);
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--foundation-blue);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        z-index: 90;
        gap: var(--spacing-sm);
    }

    .nav.active {
        display: flex;
    }

    .nav-link {
        width: 100%;
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    /* Hamburger Menu Button - Visible on mobile */
    .menu-toggle {
        display: block !important;
        order: 3;
        margin-left: var(--spacing-xs);
    }

    .menu-toggle:hover {
        color: var(--signal-teal);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .community-content {
        grid-template-columns: 1fr;
    }
    
    .architecture-diagram {
        grid-template-rows: auto;
        grid-template-columns: 1fr;
    }
    
    .layer {
        margin-bottom: var(--spacing-sm);
    }
    
    .layer::after {
        display: none;
    }
}

/* Role Selector Styles */
.hero-role-selector {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-gray);
}

.role-label {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.role-btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--neutral-white);
    border: 1px solid var(--border-gray);
    border-radius: 6px;
    color: var(--foundation-blue);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.role-btn:hover {
    background: var(--foundation-blue);
    color: var(--neutral-white);
    border-color: var(--foundation-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Learn More Link Styles */
.learn-more {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--foundation-blue);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.learn-more:hover {
    color: var(--signal-teal);
    text-decoration: underline;
}

/* Project Status Styles */
.project-status {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-status.active {
    background: #d4edda;
    color: #155724;
}

.project-status.pilot {
    background: #fff3cd;
    color: #856404;
}

.project-status.spec {
    background: #cce5ff;
    color: #004085;
}

.project-status.live {
    background: #d1e7dd;
    color: #0f5132;
}

/* Pathway List Styles */
.pathway-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-sm) 0;
    text-align: left;
}

.pathway-list li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
}

.pathway-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--signal-teal);
    font-weight: bold;
}

/* Section Actions */
.architecture-actions,
.projects-actions,
.community-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .architecture-actions,
    .projects-actions,
    .community-actions {
        flex-direction: column;
        align-items: center;
    }
}

/* 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: 0;
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus {
    outline: 3px solid var(--signal-teal);
    outline-offset: 2px;
}

/* Language Switcher */
.language-switcher {
    position: relative;
    display: flex;
    align-items: center;
    margin-left: var(--spacing-lg);
}

.language-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--neutral-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.language-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    background: var(--neutral-white);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xs);
    display: none;
    min-width: 160px;
    z-index: 1000;
    border: 1px solid var(--border-gray);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    color: var(--text-dark);
    cursor: pointer;
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.language-option:hover {
    background: var(--background-gray);
}

.language-option .checkmark {
    margin-left: auto;
    color: var(--signal-teal);
    font-weight: bold;
}

.dropdown-arrow {
    font-size: 0.75rem;
    opacity: 0.7;
}

@media (max-width: 768px) {
    .language-switcher {
        margin-left: auto;
        order: 2;
    }

    .logo {
        order: 1;
        flex: 1;
    }

    .language-switcher .language-name {
        display: none; /* Hide text on mobile to save space, flag is enough */
    }
}

/* Print styles */
@media print {
    .header, .footer, .nav {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .container {
        max-width: none !important;
        padding: 0 !important;
    }
}