/* ============================================
   Okeke LLC - Main Stylesheet
   Clean, minimal design
   ============================================ */

/* CSS Variables */
:root {
    --color-text: #1a1a1a;
    --color-text-muted: #666;
    --color-text-light: #999;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #1a1a1a;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-border: #e5e7eb;
    --color-border-light: #f0f0f0;

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --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 10px 40px rgba(0,0,0,0.1);

    --max-width: 1200px;
    --transition: 0.2s ease;
}

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

/* Snowfall Canvas */
#snowfall {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Visually Hidden (for screen readers) */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
    color: var(--color-primary-hover);
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

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

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #333;
    color: white;
}

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

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

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

.btn-outline:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.link-arrow {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.nav.scrolled {
    border-bottom-color: var(--color-border-light);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-logo img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.nav-logo:hover {
    color: var(--color-text);
}

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

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-cta {
    padding: 0.5rem 1rem;
    background: var(--color-text);
    color: white !important;
    border-radius: var(--radius-sm);
}

.nav-cta:hover {
    background: #333;
    color: white !important;
}

.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: var(--color-text);
    transition: all var(--transition);
}

/* Hero Section */
.hero {
    padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-2xl);
}

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

.hero-text {
    text-align: left;
}

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

.hero .highlight {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 0 var(--spacing-lg);
}

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

.hero-image {
    position: relative;
}

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

/* Sections */
.section {
    padding: var(--spacing-2xl) 0;
}

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

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

.app-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition);
}

.app-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.app-icon {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg-alt);
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-icon-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.app-icon-placeholder.healthcare {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.platform.business {
    background: #e3f2fd;
    color: #1565c0;
}

.placeholder-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 1.25rem;
}

/* App Icon Fallback */
.app-icon-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-md);
}

.app-content {
    flex: 1;
    min-width: 0;
}

.app-platforms {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.platform {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
}

.app-card h3 {
    font-size: 1.125rem;
}

.app-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
}

.app-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.apps-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.apps-hidden {
    display: none;
}

#more-apps {
    margin-top: var(--spacing-lg);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    padding: var(--spacing-lg);
}

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

.service-card h3 {
    margin-bottom: var(--spacing-xs);
}

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

/* About Section */
.about-content {
    max-width: 700px;
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
}

.about-content em {
    color: var(--color-text);
    font-style: normal;
    font-weight: 500;
}

.about-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
}

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

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

/* Contact Section */
.contact-section {
    text-align: center;
    background: var(--color-bg-dark);
    color: white;
}

.contact-section h2 {
    color: white;
}

.contact-section .section-subtitle {
    color: rgba(255,255,255,0.7);
}

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

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

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

.contact-section .btn-outline {
    border-color: rgba(255,255,255,0.3);
    color: white;
}

.contact-section .btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
    color: white;
}

/* Footer */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
}

.footer-brand p {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
}

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

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.875rem;
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.875rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding-top: calc(var(--spacing-xl) + 60px);
    }

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

    .hero-text {
        text-align: center;
        order: 1;
    }

    .hero-image {
        order: 2;
        margin-top: var(--spacing-lg);
    }

    .hero-subtitle {
        margin: 0 auto var(--spacing-lg);
    }

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

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

    .app-card {
        flex-direction: column;
        text-align: center;
    }

    .app-icon {
        margin: 0 auto;
    }

    .app-links {
        justify-content: center;
    }

    .about-stats {
        justify-content: center;
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }

    .footer-bottom {
        text-align: center;
    }
}

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

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact-links .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ============================================
   New Homepage Components
   ============================================ */

/* Hero Eyebrow */
.hero-eyebrow {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

/* Section Header with Link */
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.section-link {
    font-size: 0.9375rem;
    font-weight: 500;
}

/* Overview Grid (3-column cards on homepage) */
.overview-section {
    background: var(--color-bg) !important;
    padding-top: 0;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.overview-card {
    display: block;
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    color: var(--color-text);
}

.overview-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-md);
    color: var(--color-text);
}

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

.overview-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.overview-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.overview-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
}

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

.services-grid-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.service-preview-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.service-preview-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.service-preview-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.5;
    margin: 0;
}

/* Research Preview */
.research-preview {
    background: var(--color-bg) !important;
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: var(--spacing-lg);
}

.research-tag {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-bg-alt);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.research-note {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    font-style: italic;
}

/* Mobile adjustments for new components */
@media (max-width: 768px) {
    .overview-grid {
        grid-template-columns: 1fr;
    }

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}