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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

:root {
    /* Colors - Minimalist black and white palette like Thinking Machines */
    --color-black: #000000;
    --color-gray-900: #1a1a1a;
    --color-gray-800: #2d2d2d;
    --color-gray-700: #404040;
    --color-gray-600: #525252;
    --color-gray-500: #737373;
    --color-gray-400: #a3a3a3;
    --color-gray-300: #d4d4d4;
    --color-gray-200: #e5e5e5;
    --color-gray-100: #f5f5f5;
    --color-white: #ffffff;
    
    /* Typography - Serif fonts like Thinking Machines */
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

body {
    font-family: var(--font-serif);
    color: var(--color-gray-900);
    background: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 400;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    align-items: center;
}

.nav-links a {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    text-decoration: none;
    transition: color var(--transition-base);
    letter-spacing: 0.01em;
}

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

.nav-cta {
    background: var(--color-black);
    color: var(--color-white) !important;
    padding: var(--space-2) var(--space-4);
    border-radius: 4px;
    transition: background var(--transition-base);
}

.nav-cta:hover {
    background: var(--color-gray-800);
    color: var(--color-white) !important;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    padding-bottom: var(--space-24);
    position: relative;
    overflow: hidden;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: var(--text-5xl);
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: var(--space-8);
    letter-spacing: -0.025em;
    color: var(--color-black);
}

@media (min-width: 768px) {
    .hero-content h1 {
        font-size: var(--text-6xl);
    }
}

.hero-content p {
    font-size: var(--text-xl);
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--space-12);
    max-width: 680px;
}

/* Logo Hero (Home page only) */
.hero-logo {
    justify-content: center;
}

.hero-logo .hero-content {
    text-align: center;
}

.hero-logo .hero-content h1 {
    font-size: 6rem;
    font-weight: 300;
    line-height: 1;
    margin-bottom: 0;
    letter-spacing: -0.04em;
    position: relative;
    display: inline-block;
    animation: float 6s ease-in-out infinite;
}

@media (min-width: 768px) {
    .hero-logo .hero-content h1 {
        font-size: 8rem;
    }
}

@media (max-width: 768px) {
    .hero-logo .hero-content h1 {
        font-size: 4rem;
    }
}

/* Floating animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Gradient text effect */
.hero-logo .hero-content h1::before {
    content: 'ARXcelerate';
    position: absolute;
    top: 0;
    left: 0;
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-600) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Subtle glow effect */
.hero-logo .hero-content h1::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(0,0,0,0.03) 0%, transparent 70%);
    z-index: -1;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.8;
    }
}

.hero-logo .hero-content p {
    margin-top: var(--space-16);
    margin-left: auto;
    margin-right: auto;
}

/* Main Content Sections */
.section {
    padding: var(--space-24) 0;
    border-top: 1px solid var(--color-gray-200);
}

.section h2 {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-8);
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.section h3 {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 600;
    line-height: 1.4;
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    letter-spacing: -0.015em;
    color: var(--color-black);
}

.section p {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--color-gray-700);
    margin-bottom: var(--space-6);
}

.section p em {
    font-style: italic;
    color: var(--color-gray-900);
    font-weight: 500;
}

.section p strong {
    font-weight: 600;
    color: var(--color-black);
}

.section ul {
    list-style: none;
    margin: var(--space-6) 0;
    padding: 0;
}

.section li {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--color-gray-700);
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
    position: relative;
}

.section li::before {
    content: "·";
    position: absolute;
    left: 0;
    color: var(--color-gray-400);
    font-size: var(--text-2xl);
    line-height: 1;
}

/* Links */
a {
    color: var(--color-black);
    text-decoration: underline;
    text-decoration-color: var(--color-gray-300);
    text-underline-offset: 2px;
    transition: text-decoration-color var(--transition-base);
}

a:hover {
    text-decoration-color: var(--color-black);
}

.section a {
    font-weight: 500;
}

/* Call to Action Section */
.cta-section {
    padding: var(--space-32) 0;
    border-top: 1px solid var(--color-gray-200);
}

.cta-section h2 {
    margin-bottom: var(--space-6);
}

.cta-section p {
    margin-bottom: var(--space-8);
}

.cta-button {
    display: inline-block;
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-3) var(--space-8);
    border-radius: 4px;
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: background var(--transition-base);
    margin-right: var(--space-4);
    margin-bottom: var(--space-4);
}

.cta-button:hover {
    background: var(--color-gray-800);
    text-decoration: none;
}

.cta-button-secondary {
    background: transparent;
    color: var(--color-black);
    border: 1px solid var(--color-gray-300);
}

.cta-button-secondary:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-400);
}

/* Footer */
.footer {
    padding: var(--space-24) 0 var(--space-12) 0;
    border-top: 1px solid var(--color-gray-200);
    font-family: var(--font-sans);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-8);
}

.footer-brand {
    flex: 1;
}

.footer-brand h3 {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 400;
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.footer-links {
    display: flex;
    gap: var(--space-12);
}

.footer-links ul {
    list-style: none;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-2);
    padding: 0;
}

.footer-links li::before {
    display: none;
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--color-black);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-6);
}

.footer-bottom-links a {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    text-decoration: none;
}

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

/* Smooth Fade In Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* Job Listings */
.job-list {
    margin-top: var(--space-12);
}

.job-item {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.job-item:last-child {
    border-bottom: none;
}

.job-title {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
    letter-spacing: -0.015em;
}

.job-meta {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.job-description {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--space-4);
}

.job-link {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-4);
    }
    
    .hero-content h1 {
        font-size: var(--text-4xl);
    }
    
    .section h2 {
        font-size: var(--text-2xl);
    }
    
    .section h3 {
        font-size: var(--text-xl);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        align-items: flex-start;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}