/* ==========================================================================
   preskitpc.com - Main Stylesheet
   Professional blue and grey color scheme
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Primary Colors */
    --color-primary: #2563eb;       /* Professional blue */
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;

    /* Secondary Colors */
    --color-secondary: #64748b;     /* Grey */
    --color-secondary-dark: #475569;
    --color-secondary-light: #94a3b8;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #0f172a;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Accent Colors (for apps) - overridden per app */
    --color-accent: #2563eb;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                   'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono',
                        Consolas, 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

.site-logo img {
    height: 40px;
    width: auto;
}

.site-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

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

.site-nav a {
    color: var(--color-gray-600);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-gray-700);
    transition: transform var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .site-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

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

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

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero .tagline {
    font-size: 1.5rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

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

.cta-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.cta-primary:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    background-color: transparent;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.cta-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 1.125rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .cta-primary,
    .cta-secondary {
        width: 100%;
        max-width: 300px;
    }
}

/* --------------------------------------------------------------------------
   Section Titles
   -------------------------------------------------------------------------- */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-gray-900);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.5rem;
    }
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

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

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

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-900);
}

.service-card p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   How It Works
   -------------------------------------------------------------------------- */
.how-it-works {
    background-color: var(--color-gray-50);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.step {
    text-align: center;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
}

.step h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-900);
}

.step p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Why Choose Us
   -------------------------------------------------------------------------- */
.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.why-us-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.why-us-icon {
    flex-shrink: 0;
    font-size: 2rem;
    color: var(--color-primary);
}

.why-us-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.why-us-item p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Apps Grid (on main page)
   -------------------------------------------------------------------------- */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.app-tile {
    display: block;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.app-tile:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    color: inherit;
}

.app-tile img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-md);
}

.app-tile h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.app-tile p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
    color: var(--color-gray-400);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

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

.footer-contact p {
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-xl);
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--color-gray-400);
}

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

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mb-2 { margin-bottom: var(--spacing-xl); }
.mt-3 { margin-top: var(--spacing-2xl); }
.mb-3 { margin-bottom: var(--spacing-2xl); }

.hidden { display: none; }
.visible { display: block; }

@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }
}