/* styles.css */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #007bff; /* Example: A nice blue */
    --secondary-color: #6c757d; /* Example: Gray */
    --background-color: #0B111E; /* Darker, more modern background */
    --card-background: #1E293B; /* Slightly lighter for cards/sections */
    --text-color: #E2E8F0;     /* Light text for dark background */
    --heading-color: #FFFFFF;
    --accent-color: #10B981;   /* Example: A vibrant green for accents */
    --border-color: #334155;

    --font-primary: 'Poppins', sans-serif;
    --base-font-size: 16px;
    --line-height: 1.7; /* Increased slightly for better readability */

    --container-width: 1100px;
    --spacing-unit: 1rem; /* 16px */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box; /* Crucial for easier layout management */
}

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

body {
    font-family: var(--font-primary);
    line-height: var(--line-height);
    background-color: var(--background-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased; /* Better font rendering */
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: calc(var(--spacing-unit) * 1.5); } /* Increased h2 bottom margin */
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }

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

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block; /* Removes bottom space under images */
}

/* Utility Classes */
.container { /* Added container class for content sections */
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.content-section {
    padding: calc(var(--spacing-unit) * 3) 0; /* 48px top/bottom */
}

.content-section h2 {
    text-align: center;
    /* margin-bottom is now on general h2 rule */
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--background-color); /* Text color for button */
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5); /* 12px 24px */
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.cta-button:hover {
    background-color: var(--primary-color);
    color: var(--heading-color);
    text-decoration: none;
    transform: translateY(-2px);
}


/* Header & Navigation */
.site-header {
    background-color: rgba(11, 17, 30, 0.85); /* Slightly transparent */
    backdrop-filter: blur(10px); /* Glassmorphism effect */
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.site-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-unit) 0;
    height: 70px;
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}
.logo:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.nav-links ul {
    list-style: none;
    display: flex;
}

.nav-links ul li {
    margin-left: calc(var(--spacing-unit) * 1.5);
}

.nav-links ul li a {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links ul li a:hover::after,
.nav-links ul li a.active::after {
    width: 100%;
}
.nav-links ul li a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--heading-color);
    margin: 5px 0;
    transition: all 0.3s ease-in-out;
}


/* Hero Section */
.hero-section {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) var(--spacing-unit);
    background: linear-gradient(135deg, rgba(27, 39, 59, 0.95), rgba(11, 17, 30, 0.98)); /* Commented out image, relying on gradient */
    /* To add an image: , url('path/to/your-hero-background-image.jpg') no-repeat center center/cover; */
}

.hero-content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    max-width: var(--container-width);
    width: 90%;
    margin: 0 auto;
}

.hero-text {
    flex: 1;
    text-align: left;
}

.hero-text h1 {
    margin-bottom: var(--spacing-unit);
    color: var(--heading-color);
}

.hero-text .subtitle {
    font-size: 1.35rem; /* Slightly larger */
    font-weight: 400;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--accent-color);
}

.hero-text p {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    max-width: 650px; /* Slightly wider */
}

.hero-image {
    flex-basis: 35%; /* Adjust as needed */
    max-width: 320px; /* Control max size of profile picture */
}

.hero-image img {
    border-radius: 50%;
    border: 5px solid var(--accent-color);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.2); /* Shadow color from accent */
    transition: transform 0.5s ease-out;
}
.hero-image img:hover {
    transform: scale(1.05) rotate(3deg);
}

.social-links {
    margin-top: calc(var(--spacing-unit) * 1.5);
    margin-bottom: calc(var(--spacing-unit) * 2);
    display: flex;
    gap: calc(var(--spacing-unit) * 1.25); /* Slightly increased gap */
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.social-links a {
    display: inline-block;
    transition: transform 0.3s ease;
}

.social-links a:hover {
    transform: translateY(-3px) scale(1.1);
    text-decoration: none;
}

.social-links img {
    width: 32px;
    height: 32px;
    filter: grayscale(30%) brightness(1.2); /* Subtle effect for icons */
    transition: filter 0.3s ease;
}
.social-links a:hover img {
    filter: grayscale(0%) brightness(1);
}


/* About Section */
.about-section {
    background-color: var(--background-color); /* Kept same as body for seamless flow */
}
.about-section p {
    max-width: 800px; /* Wider for more content */
    margin-left: auto;
    margin-right: auto;
    text-align: left; /* Better for longer paragraphs */
}
.about-section p:not(:last-child) {
    margin-bottom: calc(var(--spacing-unit) * 1.25);
}


/* Projects Section */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* Slightly larger minmax */
    gap: calc(var(--spacing-unit) * 1.75); /* Increased gap */
}

.project-card {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: calc(var(--spacing-unit) * 1.25); /* Increased padding */
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color); /* Subtle border */
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.15); /* Accent color shadow */
}

.project-card img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: var(--spacing-unit);
    border: 1px solid var(--border-color);
}

.project-card h3 {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--accent-color);
}

.project-card p {
    font-size: 0.9rem;
    flex-grow: 1;
    margin-bottom: var(--spacing-unit);
    color: var(--text-color);
    opacity: 0.9;
}

.project-tags {
    margin-bottom: var(--spacing-unit);
    display: flex; /* For better alignment of tags */
    flex-wrap: wrap;
    gap: 0.5em;
}

.project-tags span {
    display: inline-block;
    background-color: var(--border-color);
    color: var(--text-color);
    font-size: 0.75rem;
    padding: 0.3em 0.8em;
    border-radius: 15px; /* Pill shape tags */
    /* margin-right: 0.5em; removed, using gap */
    /* margin-bottom: 0.5em; removed, using gap */
}

.project-links {
    margin-top: auto; /* Pushes links to the bottom if card heights vary */
    padding-top: var(--spacing-unit); /* Space above links */
}

.project-links a {
    font-size: 0.9rem;
    margin-right: var(--spacing-unit);
    font-weight: 500;
    color: var(--text-color);
}
.project-links a:hover {
    color: var(--accent-color);
}


/* Skills Section */
.skills-section {
    background-color: var(--card-background); /* Different background for this section */
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* Adjusted minmax */
    gap: calc(var(--spacing-unit) * 1.5);
}
.skill-category {
    background-color: var(--background-color); /* Cards slightly darker */
    padding: calc(var(--spacing-unit) * 1.25); /* Increased padding */
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.skill-category h3 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-unit); /* Increased margin */
    border-bottom: 1px solid var(--border-color);
    padding-bottom: calc(var(--spacing-unit) * 0.5);
}
.skill-category ul {
    list-style: none;
    padding-left: 0;
}
.skill-category ul li {
    margin-bottom: calc(var(--spacing-unit) * 0.6); /* Adjusted spacing */
    position: relative;
    padding-left: calc(var(--spacing-unit) * 1.5); /* Space for custom bullet */
    font-size: 0.95rem;
}
.skill-category ul li::before {
    content: '▹'; /* Changed bullet point */
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.1em;
}


/* Contact Section */
.contact-section {
    text-align: center;
}
.contact-section p {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}


/* Footer */
footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) var(--spacing-unit); /* Increased padding */
    background-color: var(--background-color); /* Match body for seamlessness */
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--secondary-color);
}


/* --- Responsiveness --- */
@media (min-width: 769px) {
    .hero-content-wrapper {
        flex-direction: row;
        text-align: left;
        gap: calc(var(--spacing-unit) * 4); /* Increased gap */
    }
    .hero-text {
        text-align: left;
    }
    .social-links {
        justify-content: flex-start; /* Align social links to left on desktop */
    }
    .about-section p {
        font-size: 1.05rem; /* Slightly larger font for about me on desktop */
    }
}


@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--card-background);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-unit) 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        border-top: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links ul {
        flex-direction: column;
        width: 100%;
    }

    .nav-links ul li {
        margin: var(--spacing-unit) 0;
        text-align: center;
    }
    .nav-links ul li a {
        padding: 0.75rem 1rem; /* Larger clickable area on mobile */
    }

    .menu-toggle {
        display: block;
    }

    .menu-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .menu-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-section {
        min-height: auto;
        padding-top: calc(var(--spacing-unit) * 3);
        padding-bottom: calc(var(--spacing-unit) * 3);
    }
    .hero-text h1 { font-size: clamp(2rem, 8vw, 2.5rem); } /* Adjusted h1 for mobile */
    .hero-text .subtitle { font-size: 1.1rem; }
    .hero-text { text-align: center; } /* Center hero text on mobile */
    .hero-image { margin-top: var(--spacing-unit); } /* Add some space above image on mobile */
    .social-links { justify-content: center; } /* Center social links on mobile */
    .cta-button { width: 80%; max-width: 280px; text-align: center; } /* Make CTA more prominent on mobile */

    .about-section p { text-align: justify; hyphens: auto; } /* Justify about text on mobile */
}