/**
 * nellieconnect/assets/css/landing.css
 * Version: 1.0.0
 * Created: 07/01 20:28
 * 
 * Landing page styles for Nellie Connect
 * Clean, modern, purple-themed design
 * 
 * Changes:
 * - 07/01 20:28 - Initial creation
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Purple palette matching Nellie branding */
    --purple-50: #faf5ff;
    --purple-100: #f3e8ff;
    --purple-200: #e9d5ff;
    --purple-300: #d8b4fe;
    --purple-400: #c084fc;
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7c3aed;
    --purple-800: #6b21a8;
    --purple-900: #581c87;
    
    /* Neutrals */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic */
    --primary: var(--purple-600);
    --primary-hover: var(--purple-700);
    --primary-light: var(--purple-100);
    --text: var(--gray-800);
    --text-muted: var(--gray-500);
    --background: #ffffff;
    --background-alt: var(--gray-50);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 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: 150ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
}

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

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

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

/* ============================================
   Container
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-100);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

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

.nav a {
    color: var(--text);
    font-weight: 500;
}

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

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all var(--transition);
}

.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 Section
   ============================================ */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--purple-50) 0%, white 50%, var(--purple-50) 100%);
}

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

.hero-content h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   Trust Banner
   ============================================ */
.trust-banner {
    background: var(--primary);
    color: white;
    padding: var(--space-lg) 0;
    text-align: center;
}

.trust-banner p {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin: 0;
}

/* ============================================
   Sections Common
   ============================================ */
section {
    padding: var(--space-3xl) 0;
}

section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-sm);
    color: var(--gray-900);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    text-align: center;
    margin-bottom: var(--space-2xl);
}

/* ============================================
   How It Works
   ============================================ */
.how-it-works {
    background: var(--background-alt);
}

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

.step {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: var(--space-xl);
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.step-icon {
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.step h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--gray-900);
}

.step p {
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.step-note {
    font-size: var(--font-size-sm);
    font-style: italic;
    color: var(--gray-400);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--gray-100);
}

/* ============================================
   Features
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.feature {
    text-align: center;
    padding: var(--space-xl);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
}

.feature h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--gray-900);
}

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

/* ============================================
   Quote Section
   ============================================ */
.quote-section {
    background: linear-gradient(135deg, var(--purple-600) 0%, var(--purple-800) 100%);
    color: white;
    text-align: center;
    padding: var(--space-3xl) 0;
}

.quote-section blockquote {
    max-width: 700px;
    margin: 0 auto var(--space-lg);
}

.quote-section blockquote p {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    font-style: italic;
    line-height: 1.4;
}

.quote-context {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* ============================================
   Who It's For
   ============================================ */
.who-its-for {
    background: var(--background-alt);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.audience-card {
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary);
}

.audience-card h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--gray-900);
}

.audience-card p {
    color: var(--text-muted);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    text-align: center;
    padding: var(--space-3xl) 0;
}

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

.contact h2 {
    margin-bottom: var(--space-lg);
}

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

.contact-methods {
    margin-top: var(--space-xl);
}

.contact-method {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--primary-light);
    border-radius: var(--radius-md);
    color: var(--primary);
    font-weight: 500;
    transition: all var(--transition);
}

.contact-method:hover {
    background: var(--primary);
    color: white;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--gray-700);
}

.footer-brand img {
    margin-bottom: var(--space-sm);
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.footer-brand p {
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    color: var(--gray-300);
    font-size: var(--font-size-sm);
}

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

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

.footer-bottom a {
    color: var(--purple-300);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 2;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .steps {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        border-bottom: 1px solid var(--gray-100);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }
    
    .nav.nav-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
}