/* Pune AI Collective - Main Stylesheet
   Inspired by Zara's minimalist design language
   Features: Clean lines, ample white space, Helvetica typography
*/

/* CSS Custom Properties for consistent theming */
:root {
    /* Colors - Zara-inspired neutral palette */
    --primary-color: #000000;
    --secondary-color: #666666;
    --background-color: #ffffff;
    --accent-color: #f8f8f8;
    --border-color: #e5e5e5;
    --text-light: #999999;
    
    /* Social media brand colors */
    --linkedin-color: #0077b5;
    --whatsapp-color: #25d366;
    
    /* Typography - Helvetica-inspired modern font stack */
    --font-primary: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    
    /* Font sizes with modular scale */
    --font-size-small: 0.875rem;     /* 14px */
    --font-size-base: 1rem;          /* 16px */
    --font-size-large: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;         /* 20px */
    --font-size-xxl: 1.5rem;         /* 24px */
    --font-size-hero: 2.5rem;        /* 40px */
    --font-size-title: 2rem;         /* 32px */
    
    /* Spacing with consistent rhythm */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-xxl: 3rem;      /* 48px */
    --spacing-huge: 4rem;     /* 64px */
    
    /* Layout and containers */
    --container-max-width: 1200px;
    --content-max-width: 800px;
    --border-radius: 0.25rem;
    --transition-speed: 0.3s;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index scale */
    --z-navigation: 100;
    --z-modal: 1000;
}

/* CSS Reset and Foundation */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

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

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--background-color);
    padding: 8px;
    text-decoration: none;
    z-index: var(--z-modal);
    border-radius: var(--border-radius);
}

.skip-link:focus {
    top: 6px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-light);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

h1 {
    font-size: var(--font-size-hero);
    font-weight: var(--font-weight-light);
}

h2 {
    font-size: var(--font-size-title);
    font-weight: var(--font-weight-light);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
    font-size: var(--font-size-large);
    line-height: 1.7;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-speed) var(--transition-timing);
}

a:hover,
a:focus {
    color: var(--secondary-color);
}

/* Lists */
ul, ol {
    list-style: none;
}

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

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-navigation);
    padding: var(--spacing-md) 0;
}

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

.nav-brand .nav-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    letter-spacing: -0.02em;
}

.nav-logo:hover,
.nav-logo:focus {
    color: var(--primary-color);
    opacity: 0.8;
}

/* Navigation menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    color: var(--secondary-color);
    padding: var(--spacing-sm) 0;
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
    color: var(--primary-color);
}

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

.dropdown-arrow {
    font-size: 0.75rem;
    transition: transform var(--transition-speed) var(--transition-timing);
}

.nav-item.has-dropdown:hover .dropdown-arrow,
.nav-item.has-dropdown.active .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-speed) var(--transition-timing);
    padding: var(--spacing-sm) 0;
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
}

.dropdown-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--secondary-color);
    font-size: var(--font-size-base);
    text-decoration: none;
    transition: all var(--transition-speed) var(--transition-timing);
    border-bottom: 1px solid transparent;
}

.dropdown-link:hover,
.dropdown-link:focus {
    color: var(--primary-color);
    background-color: var(--accent-color);
}

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

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background-color: var(--primary-color);
    transition: all var(--transition-speed) var(--transition-timing);
}

/* Social icons in navigation */
.social-icons {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    font-size: var(--font-size-large);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) var(--transition-timing);
}

.social-icon:hover,
.social-icon:focus {
    transform: translateY(-2px);
}

.linkedin-icon:hover,
.linkedin-icon:focus {
    color: var(--linkedin-color);
}

.whatsapp-icon:hover,
.whatsapp-icon:focus {
    color: var(--whatsapp-color);
}

.github-icon:hover,
.github-icon:focus {
    color: #333333;
}

/* Main content layout */
main {
    min-height: calc(100vh - 200px);
}

/* Hero section */
.hero-section {
    padding: var(--spacing-huge) var(--spacing-xl);
    background-color: var(--background-color);
    text-align: center;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

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

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xl);
    font-weight: var(--font-weight-normal);
}

.hero-cta {
    margin-top: var(--spacing-xl);
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--primary-color);
    color: var(--background-color);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) var(--transition-timing);
    border: 2px solid var(--primary-color);
}

.cta-button:hover,
.cta-button:focus {
    background-color: var(--background-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.cta-button.secondary {
    background-color: var(--background-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.cta-button.secondary:hover,
.cta-button.secondary:focus {
    background-color: var(--primary-color);
    color: var(--background-color);
}

/* Content sections */
.content-section {
    padding: var(--spacing-huge) var(--spacing-xl);
}

.content-section:nth-child(even) {
    background-color: var(--accent-color);
}

.section-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    text-align: center;
}

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-title);
    font-weight: var(--font-weight-light);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

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

/* Mission and Vision text styling */
.mission-text,
.vision-text {
    font-size: var(--font-size-large);
    line-height: 1.8;
    color: var(--secondary-color);
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

/* Meetups text styling */
.meetups-text {
    font-size: var(--font-size-large);
    line-height: 1.8;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Meetup stats */
.meetups-info {
    margin-top: var(--spacing-xl);
}

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

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-width: 120px;
}

.stat-number {
    display: block;
    font-size: var(--font-size-xxl);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

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

.meetup-cta {
    text-align: center;
}

/* Contact section */
.contact-text {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--background-color);
    color: var(--secondary-color);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-speed) var(--transition-timing);
    font-weight: var(--font-weight-medium);
}

.contact-link:hover,
.contact-link:focus {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.linkedin-link:hover,
.linkedin-link:focus {
    color: var(--linkedin-color);
}

.whatsapp-link:hover,
.whatsapp-link:focus {
    color: var(--whatsapp-color);
}

.github-link:hover,
.github-link:focus {
    color: #333333;
}

/* Footer */
.site-footer {
    background-color: var(--primary-color);
    color: var(--background-color);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-huge);
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

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

.footer-text {
    color: var(--background-color);
    font-size: var(--font-size-small);
    margin-bottom: 0;
}

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

.footer-link {
    color: var(--background-color);
    font-size: var(--font-size-small);
    opacity: 0.8;
    transition: opacity var(--transition-speed) var(--transition-timing);
}

.footer-link:hover,
.footer-link:focus {
    color: var(--background-color);
    opacity: 1;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .hero-cta,
    .contact-links,
    .social-icons,
    .site-footer {
        display: none;
    }
    
    .hero-section,
    .content-section {
        page-break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}