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

:root {
    --primary-color: #007bff; /* Bright Blue */
    --secondary-color: #6c757d; /* Muted Grey */
    --accent-color: #28a745; /* Green for success/highlights */
    --dark-bg: #212529; /* Dark background */
    --light-bg: #f8f9fa; /* Light background */
    --text-color: #343a40; /* Dark text */
    --light-text-color: #e9ecef; /* Light text for dark backgrounds */
    --card-bg: #ffffff; /* Card background */
    --border-color: #dee2e6; /* Light border */
    --gradient-start: #007bff;
    --gradient-end: #00bcd4; /* Cyan for gradients */

    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

/* Theme overrides: support dark and light via data-theme on html */
html {
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* Dark theme variables */
html[data-theme="dark"] {
    --primary-color: #60a5fa;
    --secondary-color: #9ca3af;
    --accent-color: #34d399;
    --dark-bg: #0b1220;
    --light-bg: #071423; /* page background when in dark mode */
    --text-color: #e6eef8;
    --light-text-color: #e6eef8;
    --card-bg: #0f1724;
    --border-color: #1f2937;
    --gradient-start: #2563eb;
    --gradient-end: #06b6d4;
}

/* Ensure smooth color transitions for main elements */
body, .profile-container, .skill-card, .project-card, .experience-item, .education-item, #achievements ul li, footer {
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

/* Theme toggle button */
.theme-toggle {
    position: fixed; /* stay visible when scrolling */
    top: 14px;
    right: 18px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--light-text-color);
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.05rem;
    z-index: 60;
    backdrop-filter: blur(4px);
}

.theme-toggle i { pointer-events: none; }

/* Light-mode specific look for the toggle */
/* Light-mode: make the toggle white as requested */
html:not([data-theme="dark"]) .theme-toggle {
    background: #ffffff; /* white button in light mode */
    border: 1px solid rgba(16,24,40,0.06);
    color: var(--dark-bg); /* dark icon/text on white button */
    box-shadow: 0 4px 12px rgba(16,24,40,0.06);
}

/* Basic site nav styles */
.site-nav {
    position: fixed; /* stay visible when scrolling */
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: center; /* center the links */
    z-index: 55;
    pointer-events: auto;
}
.site-nav a {
    color: var(--text-color); /* default for light mode */
    background: rgba(0,0,0,0.03);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.18s ease, color 0.18s ease, transform 0.15s ease;
}
.site-nav a:hover, .site-nav a:focus {
    transform: translateY(-2px);
    background: rgba(0,0,0,0.06);
}

/* Dark-mode nav adjustments */
html[data-theme="dark"] .site-nav a {
    color: var(--light-text-color);
    background: rgba(255,255,255,0.03);
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
    overflow-x: hidden; /* Prevent horizontal scroll due to animations */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--text-color);
    line-height: 1.2;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 25px; position: relative; }
h3 { font-size: 1.8rem; margin-bottom: 10px; }

h2::after { /* Underline effect for section titles */
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
}

p {
    margin-bottom: 15px;
}

ul {
    list-style: none;
    padding-left: 0;
}

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

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

/* --- Buttons --- */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    font-family: var(--font-heading);
}

.btn-primary {
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.4);
    color: white; /* Keep text white on hover */
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 10px 20px;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.btn-primary i, .btn-secondary i {
    margin-left: 8px;
}

/* --- Header & Hero Section --- */
/* --- Header & Hero Section --- */
header {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: white;
    text-align: center;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
    /* height: 100vh; */ /* <-- It's now commented out */
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Light-mode header override so white toggle remains visible */
html:not([data-theme="dark"]) header {
    /* lighter, slightly bluish gradient for contrast with white toggle */
    background: linear-gradient(135deg, #eef2ff 0%, #e6f0ff 50%, #f8fbff 100%);
    color: var(--text-color);
}

/* Ensure header titles are dark in light mode and remove heavy text shadows */
html:not([data-theme="dark"]) header h1,
html:not([data-theme="dark"]) header .tagline {
    color: var(--text-color) !important;
    text-shadow: none !important;
}

/* Make site-nav more visible on the light header */
html:not([data-theme="dark"]) .site-nav a {
    background: rgba(255,255,255,0.85);
    color: var(--text-color);
    box-shadow: 0 6px 18px rgba(16,24,40,0.06);
}

/* Slightly adjust the toggle border in light mode for contrast */
html:not([data-theme="dark"]) .theme-toggle {
    border: 1px solid rgba(16,24,40,0.08);
}

.hero-content {
    max-width: 800px;
    z-index: 10;
    position: relative;
}

header h1 {
    color: white !important;
    font-size: 4.5rem;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-shadow: 0 0 8px rgba(0, 0, 0, 0.6);
}

header .tagline {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 40px;
    color: var(--light-text-color);
}

/* --- Sections Styling --- */
section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
    border-bottom: none;
}

/* --- NEW: Profile Section --- */
#profile h2 {
    text-align: center; /* Center the "Profile Summary" title */
    margin-bottom: 40px; /* More space for the layout */
}

.profile-container {
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap; /* Allow wrapping on small screens */
    justify-content: center; /* Center items when they wrap */
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.profile-image {
    flex-shrink: 0; /* Prevents the image from shrinking */
    width: 250px;
    height: 250px;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Ensures image covers the space nicely */
    border-radius: 50%; /* Makes the image circular */
    border: 6px solid var(--card-bg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.profile-text {
    flex: 1; /* Allows text to take remaining space */
    min-width: 300px; /* Prevents text from getting too squished */
}

.profile-text p {
    font-size: 1.1rem;
    color: var(--secondary-color);
    line-height: 1.7;
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.skill-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.skill-card i {
    font-size: 3.5rem;
    margin-bottom: 15px;
    display: block; /* Ensures icon takes its own line */
}

.icon-gradient {
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.skill-card h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.skill-card p {
    font-size: 0.95rem;
    color: var(--secondary-color);
}

/* --- NEW: Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* Slightly larger min-width */
    gap: 30px;
    margin-top: 30px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden; /* Ensures media border-radius works */
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

/* NEW: Project Media Container */
.project-media {
    width: 100%;
    aspect-ratio: 16 / 10; /* Gives a consistent shape */
    background-color: #f0f0f0; /* Placeholder color */
    margin-bottom: 20px;
}

.project-media img,
.project-media video {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Covers the area, crops if needed */
}

/* Styles for the content inside the card */
.project-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    padding: 0 30px; /* Add padding to content */
}

.project-tech {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-weight: 600;
    padding: 0 30px;
}

.project-card p {
    font-size: 1rem;
    margin-bottom: 20px;
    flex-grow: 1; /* Allows paragraph to take available space */
    padding: 0 30px;
}

.project-card .btn-secondary {
    margin: 0 30px 30px 30px; /* Add margin to the button */
    align-self: flex-start; /* Aligns button to the left */
}

/* --- Experience & Education Sections --- */
.experience-item, .education-item {
    background-color: var(--card-bg);
    padding: 25px;
    border-left: 5px solid var(--primary-color);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 25px;
    transition: all 0.3s ease;
}

.experience-item:hover, .education-item:hover {
    border-left-color: var(--accent-color);
    transform: translateX(5px);
}

.experience-item h3, .education-item h3 {
    font-size: 1.6rem;
    margin-bottom: 5px;
    color: var(--dark-bg);
}

.experience-detail, .education-detail {
    font-style: italic;
    color: var(--secondary-color);
    margin-bottom: 10px;
    display: block;
}

/* --- Achievements Section --- */
#achievements ul li {
    background-color: var(--card-bg);
    padding: 15px 20px;
    margin-bottom: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    font-size: 1.05rem;
    color: var(--text-color);
    transition: transform 0.2s ease;
}

#achievements ul li:hover {
    transform: translateX(5px);
    background-color: #f0f8ff; /* Light blue hover */
}

.icon-small {
    font-size: 1.2rem;
    margin-right: 15px;
    color: var(--primary-color);
}

/* --- Interests Section --- */
.interests-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.interest-tag {
    background-color: #e3f2fd; /* Very light blue (light mode default) */
    color: var(--primary-color);
    padding: 8px 18px;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
    box-shadow: 0 6px 16px rgba(2,6,23,0.03);
}

.interest-tag:hover {
    background-color: var(--primary-color);
    color: white;
}

.interest-tag i {
    margin-right: 8px;
}

/* Dark mode appearance for interest tags */
html[data-theme="dark"] .interest-tag {
    background-color: rgba(255,255,255,0.04);
    color: var(--light-text-color);
    box-shadow: none;
    border: 1px solid rgba(255,255,255,0.04);
}

html[data-theme="dark"] .interest-tag:hover {
    background-color: rgba(255,255,255,0.06);
    color: var(--dark-bg);
}

/* --- Footer (Upgraded) --- */
footer {
    background-color: var(--dark-bg);
    color: var(--light-text-color);
    text-align: center;
    padding: 60px 20px 40px 20px; /* More padding on top */
    font-size: 0.95rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto 40px auto;
    text-align: left;
}

.contact-details,
.social-links {
    flex: 1;
    min-width: 250px; /* Ensures they don't get too squished */
}

.contact-details h3,
.social-links h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 20px;
}

.contact-details a {
    display: block;
    color: var(--light-text-color);
    margin-bottom: 12px;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: var(--primary-color);
}

.contact-details a i {
    margin-right: 12px;
    width: 20px; /* Aligns icons neatly */
    text-align: center;
}

.social-links a {
    color: var(--light-text-color);
    margin: 0 15px 0 0; /* Space out social links */
    font-size: 1.8rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.1);
}

.copyright {
    border-top: 1px solid #444; /* Separator line */
    padding-top: 30px;
    margin-top: 30px;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* Remove old footer styles that are now handled */
/* You can safely delete or ignore the old 'footer' and '.social-links' rules */

.social-links {
    margin-top: 20px;
}

.social-links a {
    color: var(--light-text-color);
    margin: 0 15px;
    font-size: 1.5rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.1);
}

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

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-in {
    animation: fadeIn 1.5s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }

    header {
        padding: 80px 15px;
    }

    .hero-content h1 {
        font-size: 3.5rem;
    }
    .hero-content .tagline {
        font-size: 1.2rem;
    }

    .container {
        padding: 10px;
    }

    /* Updated responsive profile */
    .profile-container {
        flex-direction: column; /* Stack image and text vertically */
        gap: 20px;
    }

    .profile-image {
        width: 200px;
        height: 200px;
    }

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

    .skills-grid, .projects-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 40px 0;
    }

    .experience-item, .education-item {
        padding: 20px;
    }

    .interest-tag {
        font-size: 0.9rem;
        padding: 7px 15px;
    }

    /* Updated responsive project card padding */
    .project-card h3,
    .project-tech,
    .project-card p {
        padding: 0 20px;
    }
    .project-card .btn-secondary {
        margin: 0 20px 20px 20px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2.5rem;
    }
    header .tagline {
        font-size: 1rem;
    }
    .btn-primary {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    h2 {
        font-size: 1.8rem;
    }
}