/* ==========================================
   INCOGNIYO - Privacy-First Technology
   Modern Responsive Landing Page Styles
   ========================================== */

/* === CSS Variables for Theming === */
:root {
    /* Light Mode Colors */
    --color-bg: #ffffff;
    --color-text: #000000;
    --color-text-secondary: #333333;
    --color-text-muted: #666666;
    --color-primary: #4CAF50;
    --color-primary-hover: #45a049;
    --color-primary-light: #81C784;
    --color-border: #e0e0e0;
    --color-card-bg: #f9f9f9;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    
    /* Transitions */
    --transition-speed: 0.3s;
    --transition-timing: ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: 1rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-bg: #0a0a0a;
    --color-text: #ffffff;
    --color-text-secondary: #e0e0e0;
    --color-text-muted: #b0b0b0;
    --color-border: #2a2a2a;
    --color-card-bg: #1a1a1a;
    --color-shadow: rgba(255, 255, 255, 0.05);
    --color-shadow-hover: rgba(255, 255, 255, 0.1);
}

/* === Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color var(--transition-speed) var(--transition-timing),
                color var(--transition-speed) var(--transition-timing);
    overflow-x: hidden;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-timing);
}

strong {
    font-weight: 600;
    color: var(--color-text);
}

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

/* === Navigation === */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: all var(--transition-speed) var(--transition-timing);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo-link {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo {
    height: 35px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
    transition: opacity var(--transition-speed) var(--transition-timing);
}

/* Logo for light mode: Show dark logo on light background */
.logo-for-light-mode {
    display: block !important;
}

.logo-for-dark-mode {
    display: none !important;
}

/* Logo for dark mode: Show light logo on dark background */
[data-theme="dark"] .logo-for-light-mode {
    display: none !important;
}

[data-theme="dark"] .logo-for-dark-mode {
    display: block !important;
}

.nav-links {
    display: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed) var(--transition-timing);
    position: relative;
}

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

.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

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

/* Theme Toggle - Fixed contrast for better visibility */
.theme-toggle {
    background-color: var(--color-card-bg);
    border: 2px solid var(--color-border);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-timing);
    color: var(--color-text);
}

.theme-toggle:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    width: 22px;
    height: 22px;
    transition: transform var(--transition-speed) var(--transition-timing);
    stroke: currentColor;
}

/* Light mode: Show moon icon (to switch to dark) */
.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

/* Dark mode: Show sun icon (to switch to light) */
[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 44px;
    height: 44px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 10px;
    transition: all var(--transition-speed) var(--transition-timing);
}

.mobile-menu-toggle:hover {
    background-color: var(--color-card-bg);
    border-color: var(--color-primary);
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-speed) var(--transition-timing);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

/* Mobile Navigation */
.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed) var(--transition-timing);
    margin-top: 0;
}

.mobile-nav.active {
    max-height: 300px;
    margin-top: var(--spacing-sm);
}

.mobile-nav-link {
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition-speed) var(--transition-timing);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background-color: var(--color-card-bg);
    color: var(--color-primary);
}

/* === Hero Section === */
.hero {
    position: relative;
    padding: var(--spacing-xl) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-decoration {
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, var(--color-primary) 100%);
    opacity: 0.03;
    pointer-events: none;
    border-radius: 0 0 0 50%;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero-logo {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-logo-img {
    width: auto;
    max-width: 280px;
    height: auto;
    max-height: 100px;
    object-fit: contain;
    animation: float 3s ease-in-out infinite;
}

.hero-logo-img.logo-for-light-mode {
    display: block !important;
}

.hero-logo-img.logo-for-dark-mode {
    display: none !important;
}

[data-theme="dark"] .hero-logo-img.logo-for-light-mode {
    display: none !important;
}

[data-theme="dark"] .hero-logo-img.logo-for-dark-mode {
    display: block !important;
}

.hero-title {
    font-size: clamp(2rem, 5vw, var(--font-size-4xl));
    margin-bottom: var(--spacing-sm);
    font-weight: 800;
}

.title-highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-speed) var(--transition-timing);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

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

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-icon {
    font-size: var(--font-size-4xl);
    display: block;
    margin-bottom: var(--spacing-sm);
    animation: bounceIn 0.6s ease-out;
}

.section-title {
    color: var(--color-text);
    font-size: clamp(1.75rem, 4vw, var(--font-size-3xl));
    font-weight: 800;
}

.section-intro {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

/* === Content Cards === */
.content-card {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
    transition: all var(--transition-speed) var(--transition-timing);
    border: 1px solid var(--color-border);
}

.content-card:hover {
    box-shadow: 0 4px 16px var(--color-shadow-hover);
    transform: translateY(-2px);
}

.content-card-centered {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.lead-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.mission-statement,
.philosophy-statement,
.vision-statement {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

/* === Services Grid === */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.service-card {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: all var(--transition-speed) var(--transition-timing);
}

.service-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 16px var(--color-shadow-hover);
    transform: translateY(-4px);
}

.service-title {
    color: var(--color-text);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

/* === Footer === */
.footer {
    background-color: var(--color-card-bg);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

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

.footer-logo {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-logo-img {
    width: auto;
    max-width: 160px;
    height: auto;
    max-height: 45px;
    object-fit: contain;
    margin-bottom: var(--spacing-xs);
}

.footer-logo-img.logo-for-light-mode {
    display: block !important;
}

.footer-logo-img.logo-for-dark-mode {
    display: none !important;
}

[data-theme="dark"] .footer-logo-img.logo-for-light-mode {
    display: none !important;
}

[data-theme="dark"] .footer-logo-img.logo-for-dark-mode {
    display: block !important;
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

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

.footer-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-speed) var(--transition-timing);
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-motto {
    margin-top: var(--spacing-xs);
    font-style: italic;
}

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

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

/* === Responsive Design === */

/* Mobile: Logo sizing constraints */
@media (max-width: 767px) {
    .logo {
        height: 30px;
        max-width: 140px;
    }
    
    .hero-logo-img {
        max-width: 200px;
        max-height: 80px;
    }
    
    .footer-logo-img {
        max-width: 140px;
        max-height: 40px;
    }
}

/* Tablet and up */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
    }
    
    .nav-links {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .mobile-nav {
        display: none !important;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .footer-logo {
        text-align: left;
    }
    
    /* Tablet logo sizes */
    .logo {
        height: 35px;
        max-width: 180px;
    }
    
    .hero-logo-img {
        max-width: 250px;
        max-height: 90px;
    }
    
    .footer-logo-img {
        max-width: 150px;
        max-height: 42px;
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .hero {
        min-height: 90vh;
    }
    
    /* Desktop logo sizes */
    .logo {
        height: 40px;
        max-width: 200px;
    }
    
    .hero-logo-img {
        max-width: 280px;
        max-height: 100px;
    }
    
    .footer-logo-img {
        max-width: 160px;
        max-height: 45px;
    }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

/* Skip to main content link for accessibility */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
    z-index: 9999;
}

.skip-to-main:focus {
    top: 0;
}

/* === Print Styles === */
@media print {
    .navbar,
    .hero-cta,
    .theme-toggle,
    .mobile-menu-toggle,
    .footer-nav {
        display: none !important;
    }
}