/* 
 * Justdevices Website - Main Stylesheet
 * Inspired by Google Antigravity
 */

:root {
    /* Color Palette */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f4;

    --color-text-primary: #202124;
    --color-text-secondary: #5f6368;
    --color-text-light: #ffffff;

    --color-accent: #1a73e8;
    /* Google Blue */
    --color-accent-hover: #174ea6;
    --color-accent-subtle: #e8f0fe;

    --color-border: #dadce0;

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-h1: 3.5rem;
    --font-size-h2: 2.5rem;
    --font-size-h3: 1.5rem;
    --line-height-base: 1.6;
    --line-height-tight: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

ul {
    list-style: none;
}

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

/* Typography Utility Classes */
.h1 {
    font-size: var(--font-size-h1);
    font-weight: 700;
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.h2 {
    font-size: var(--font-size-h2);
    font-weight: 600;
    line-height: var(--line-height-tight);
    letter-spacing: -0.01em;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.h3 {
    font-size: var(--font-size-h3);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.text-lead {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    /* Slightly rounded, Google style */
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-light);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    transform: translateY(-1px);
}

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* Header & Nav */
header {
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 400;
    font-size: 1.5rem;
    /* Back to standard size */
    letter-spacing: -0.05em;
    /* Tight tracking for modern look */
    line-height: 1;
    margin-top: 0;
    /* Reset */
}

.logo-text strong {
    font-weight: 700;
    /* Bold for 'Just' */
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

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

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

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height);
    /* Offset for fixed header */
    overflow: hidden;
}

.hero-content {
    z-index: 10;
    position: relative;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    /* Let clicks pass through if needed, but we need mouse events for interaction usually. JS will handle this. */
}

/* If we want the canvas to capture mouse events, we remove pointer-events: none; or handle it on window */

/* Services Section */
.services {
    background-color: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    border-color: var(--color-accent);
}

.service-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.service-list {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.service-list li {
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.service-list li::before {
    content: "•";
    color: var(--color-accent);
    position: absolute;
    left: 0;
}

/* Technology Section */
.tech-stack {
    text-align: center;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.tech-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: 20px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* Projects Section */
.projects {
    background-color: var(--color-bg-tertiary);
    /* Light Grey background */
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-bg-primary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    /* Subtle shadow */
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Background colors are inline for variety, but base style here */
    width: 100%;
}

.project-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-top: auto;
    /* Push to bottom */
    font-size: 0.95rem;
}

.btn-link:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Footer */
footer {
    background-color: var(--color-text-primary);
    color: var(--color-text-light);
    padding: var(--spacing-md) 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 2.5rem;
        --font-size-h2: 2rem;
        --spacing-xl: 4rem;
    }

    .nav-links {
        display: none;
        /* Simplify for now, could add hamburger later */
    }
}