:root {
    --primary-color: #3b82f6; /* Blue */
    --secondary-color: #10b981; /* Emerald */
    --background-light: #f9fafb; /* Very light gray */
    --background-dark: #1f2937; /* Dark gray */
    --text-light: #f9fafb;
    --text-dark: #111827;
    --card-bg: #ffffff;
    --font-family: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

section, header {
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

h1, h2, h3 {
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 3rem; }
p { margin-bottom: 1rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--text-light);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
    background-color: #2563eb; /* Darker blue */
    transform: translateY(-3px);
}

/* --- Hero Section --- */
#hero {
    background: var(--background-dark);
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-bottom: 120px; /* Space for wave */
}

#particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content-parallax {
    position: relative;
    z-index: 2;
    transition: transform 0.1s ease-out;
    perspective: 1000px;
}

.hero-content {
    transform: translateZ(50px); /* Gives a bit of depth */
}

.hero-content .profile-image {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    border: 5px solid var(--primary-color);
    object-fit: cover;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

#hero h1 {
    font-weight: 700;
}

#hero .subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
}

.scroll-indicator {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-light);
    border-radius: 25px;
    z-index: 2;
}
.scroll-indicator span {
    position: absolute;
    top: 10px;
    left: 50%;
    width: 4px;
    height: 10px;
    background: var(--text-light);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll-anim 2s infinite;
}

@keyframes scroll-anim {
    0% { top: 10px; opacity: 1; }
    100% { top: 25px; opacity: 0; }
}

/* --- About Section --- */
#about { background-color: var(--background-light); }
.about-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}
.about-text { flex: 1; }
.about-image { flex: 1; text-align: center; }
.about-image img { max-width: 100%; border-radius: 1rem; }
.highlights { list-style: none; padding-left: 0; }

/* --- Portfolio Section - CENTERED LAYOUT --- */
#portfolio {
    background-color: var(--background-dark);
    color: var(--text-light);
}

.portfolio-showcase {
    max-width: 1000px; /* Reduced width for a more focused look */
    margin: 0 auto;
    background-color: #2a384c;
    padding: 3rem; /* Increased padding */
    border-radius: 1.5rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem; /* Increased gap */
    position: relative;
}

.portfolio-left {
    position: relative;
}

.project-display {
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: 1rem;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.project-highlight-bg {
    position: absolute;
    background-color: #374151;
    border-radius: 0.75rem;
    transition: all 0.6s cubic-bezier(0.65, 0, 0.35, 1);
    z-index: 1;
}

.project-video-wrapper {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 2;
}
.project-video {
    width: 100%; height: 100%; object-fit: cover;
}
.project-info {
    text-align: left;
    min-height: 80px;
}
.project-title {
    font-size: 1.75rem; margin-bottom: 0.5rem;
}
.project-description {
    color: rgba(255, 255, 255, 0.7); font-size: 1rem;
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
}

.project-list-item {
    display: flex;
    align-items: center;
    gap: 1.5rem; /* Increased gap */
    padding: 1rem;
    background: transparent;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-family);
    color: var(--text-light);
    position: relative;
    z-index: 3;
    transition: background-color 0.3s ease;
}

.project-list-item:hover, .project-list-item.active {
    background-color: rgba(255, 255, 255, 0.05);
}

/* New Icon Style */
.item-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background-color: #374151;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-light);
}

.item-text h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
}

.item-text span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}


/* --- Skills Section --- */
#skills { background-color: var(--background-light); }
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.skill-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.skill-bar {
    width: 100%;
    height: 1.5rem;
    background-color: #e5e7eb; /* Gray-200 */
    border-radius: 1rem;
    overflow: hidden;
}
.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 1rem;
    width: 0; /* Animated by JS */
    transition: width 1.5s ease-in-out;
}

/* --- Contact Section --- */
#contact {
    background-color: var(--background-dark);
    color: var(--text-light);
    padding-bottom: 0;
}
#contact-form {
    max-width: 600px;
    margin: 0 auto 3rem auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
#contact-form input, #contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #4b5563; /* Gray-600 */
    background-color: #374151; /* Gray-700 */
    border-radius: 0.5rem;
    color: var(--text-light);
}
#contact-form input:focus, #contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}
.contact-info {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid #4b5563; /* Gray-600 */
    margin-top: 4rem;
}
.contact-info p { margin: 0.5rem 0; }
.contact-info a { color: var(--secondary-color); }

/* --- On-Scroll Animation --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}