/* ===================================
   Hartz AI - Main Stylesheet
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-sky-blue: #4A90E2;
    --color-growth-green: #7CB342;
    --color-confidence-coral: #FF6F61;
    --color-charcoal: #37474F;
    --color-light-grey: #ECEFF1;
    --color-white: #FFFFFF;
    --color-gray-300: #E0E0E0;
    --color-gray-400: #BDBDBD;
    --color-gray-600: #757575;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 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: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --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);
    --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-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-white);
}

/* Hide scrollbar but keep functionality */
::-webkit-scrollbar {
    display: none;
}

html,
body {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-charcoal);
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 2rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-sky-blue);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-growth-green);
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

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

.text-right {
    text-align: right;
}

/* Color Utilities */
.text-sky-blue {
    color: var(--color-sky-blue);
}

.text-growth-green {
    color: var(--color-growth-green);
}

.text-confidence-coral {
    color: var(--color-confidence-coral);
}

.text-charcoal {
    color: var(--color-charcoal);
}

.bg-sky-blue {
    background-color: var(--color-sky-blue);
}

.bg-growth-green {
    background-color: var(--color-growth-green);
}

.bg-confidence-coral {
    background-color: var(--color-confidence-coral);
}

.bg-charcoal {
    background-color: var(--color-charcoal);
}

.bg-light-grey {
    background-color: var(--color-light-grey);
}

/* Layout */
.section {
    padding: 4rem 0;
}

.section-lg {
    padding: 6rem 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

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

.justify-between {
    justify-content: space-between;
}

.space-x-4 > * + * {
    margin-left: 1rem;
}

.space-y-4 > * + * {
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 1024px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.75rem;
    }
    
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .section-lg {
        padding: 4rem 0;
    }
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--color-sky-blue);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

/* Print Styles */
@media print {
    header,
    footer,
    nav,
    .no-print {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
    }
}