/* Importing Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono&family=Space+Grotesk:wght@400;700&family=Syne:wght@400;700&display=swap');

/* --- CSS Variables --- */
:root {
    --bg-color: #F9FAFB;
    --text-color: #111827;
    --primary-accent: #4F46E5; /* Indigo 600 */
    --border-color: #E5E7EB; /* A light grey for borders */
    --shadow-color: rgba(0, 0, 0, 0.05);

    --max-width: 700px;
    --base-spacing: 1rem; /* 16px */
    --section-padding: 1.5rem; /* 24px */
    --border-radius: 16px;
}

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

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

body {
    font-family: 'Syne', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
    z-index: 999;
}

.skip-link:focus {
    position: static;
    width: auto;
    height: auto;
    padding: 0.5rem 1rem;
    background-color: var(--primary-accent);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    margin: 1rem;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1.2;
    margin-bottom: var(--base-spacing);
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem; /* ~40px */
}

h2 {
    font-size: 2rem; /* ~32px */
}

h3 {
    font-size: 1.5rem; /* ~24px */
}

p {
    margin-bottom: var(--base-spacing);
}

a {
    color: var(--primary-accent);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover, a:focus {
    text-decoration: underline;
    color: darken(var(--primary-accent), 10%); /* This would need a SASS function, but for pure CSS, we'll use a slightly darker hex */
    color: #3f39c2; /* A slightly darker indigo for hover */
}

/* Code/small text style */
.code, .contact-info p {
    font-family: 'JetBrains Mono', monospace;
}

/* Screen Reader Only Text */
.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;
}

/* --- Layout & Structure --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--base-spacing); /* Horizontal padding */
}

.section {
    padding-top: var(--section-padding);
    padding-bottom: var(--section-padding);
}

/* Header / Hero Section */
.header-hero {
    background-color: var(--bg-color);
    text-align: center;
    padding-top: calc(var(--section-padding) * 2); /* More padding for hero */
    padding-bottom: calc(var(--section-padding) * 2);
}

.hero-title {
    margin-bottom: var(--base-spacing);
}

.hero-description {
    font-size: 1.25rem; /* ~20px */
    margin-bottom: calc(var(--base-spacing) * 1.5);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.2s ease-in-out, opacity 0.2s ease-in-out;
    border: none; /* Ensure no default button border */
    cursor: pointer;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
}

.primary-button {
    background-color: var(--primary-accent);
    color: white;
}

.primary-button:hover, .primary-button:focus {
    opacity: 0.9;
    text-decoration: none; /* Remove underline on hover for buttons */
}

.secondary-button {
    background-color: transparent;
    color: var(--primary-accent);
    border: 2px solid var(--primary-accent);
    padding: 0.625rem 1.375rem; /* Adjust padding for border */
}

.secondary-button:hover, .secondary-button:focus {
    background-color: var(--primary-accent);
    color: white;
    text-decoration: none;
}

.secondary-button.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    border-color: #9CA3AF; /* A lighter grey for disabled state */
    color: #9CA3AF;
    pointer-events: none; /* Disable interaction */
    background-color: transparent;
}


/* Sections */
.section-title {
    text-align: center;
    margin-bottom: calc(var(--base-spacing) * 2);
}

/* Projects Section */
.projects-section {
    background-color: white; /* Slightly different background for visual separation */
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px -1px var(--shadow-color), 0 2px 4px -2px var(--shadow-color);
    margin-bottom: calc(var(--section-padding) * 1.5);
    margin-top: calc(var(--section-padding) * 1.5);
    padding-top: var(--section-padding);
    padding-bottom: var(--section-padding);
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr; /* Single column on small screens */
    gap: var(--base-spacing);
}

@media (min-width: 600px) {
    .project-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Two columns on larger screens */
    }
}

.project-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--base-spacing) calc(var(--base-spacing) * 1.5);
    background-color: var(--bg-color); /* Inner card background */
    box-shadow: 0 1px 2px 0 var(--shadow-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between; /* Push button to bottom */
}

.project-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--primary-accent);
}

.project-card p {
    font-size: 0.95rem;
    margin-bottom: var(--base-spacing);
    flex-grow: 1; /* Allow paragraph to take up space */
}

.project-card .button {
    align-self: flex-start; /* Align button to start of its flex container */
    margin-top: auto; /* Push button to the bottom if content varies */
}

/* Contact Section */
.contact-section {
    text-align: center;
    margin-bottom: calc(var(--section-padding) * 1.5);
}

.contact-info {
    font-size: 1.125rem; /* ~18px */
    line-height: 1.8;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

.contact-link {
    font-weight: 700;
}

.copy-button {
    background-color: var(--primary-accent);
    color: white;
    border: none;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 0.5rem;
    transition: background-color 0.2s ease-in-out, opacity 0.2s ease-in-out;
    vertical-align: middle;
}

.copy-button:hover, .copy-button:focus {
    background-color: #3f39c2; /* Darker indigo */
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: white;
    text-align: center;
    padding: var(--base-spacing) 0;
    font-size: 0.875rem; /* ~14px */
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .header-hero {
        padding-top: var(--section-padding);
        padding-bottom: var(--section-padding);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .button {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .project-card {
        padding: var(--base-spacing);
    }

    .copy-button {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }
}

/* Animations (for JS scroll effects) */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}