/* --- CSS RESET & BASIC SETUP --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

/* --- CSS CUSTOM PROPERTIES (DARK THEME ONLY) --- */
:root {
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Roboto', sans-serif;

    --bg-color: #0A0A0A; /* Even Darker Base */
    --bg-color-alt: #141414; /* Slightly Lighter for depth, e.g., cards, sections */
    --text-color: #F0F0F0; /* Brighter Off-White */
    --text-secondary-color: #B0B0B0; /* Lighter Grey for less emphasis */
    --primary-color: #00CFE8; /* Vibrant Cyan/Turquoise */
    --primary-hover: #00A9BF; /* Darker shade for hover */
    --border-color: #2A2A2A; /* Darker, more subtle borders */
    --shadow-color: rgba(0, 207, 232, 0.08); /* Subtle glow */
    --shadow-strong-color: rgba(0, 207, 232, 0.15);
    --card-shadow: 0 8px 25px var(--shadow-color);
    --header-bg: rgba(10, 10, 10, 0.8); /* Darker, more transparent header */
}

/* --- GENERAL BODY & TYPOGRAPHY --- */
body {
    font-family: var(--font-secondary);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 90%;
    max-width: 1140px;
    margin: auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 0.75em;
}
h2.section-title {
    font-size: clamp(2.2rem, 5vw, 3rem);
    margin-bottom: 70px;
    text-align: center;
    font-weight: 700;
    position: relative;
    padding-bottom: 20px;
    color: var(--primary-color);
}
h2.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    border-radius: 2px;
}

p {
    margin-bottom: 1.2rem;
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    color: var(--text-secondary-color);
}
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease-in-out, opacity 0.2s ease-in-out;
}
a:hover {
    color: var(--primary-hover);
    opacity: 0.85;
}
.text-primary { color: var(--primary-color) !important; }

/* --- HEADER & NAVIGATION --- */
header {
    background-color: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1.2rem 0; /* Slightly more padding */
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo-link { text-decoration: none !important; }
header .logo {
    font-size: clamp(1.6rem, 4vw, 2rem);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0;
    letter-spacing: -0.5px;
}
header nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}
header nav ul li {
    margin-left: 35px; /* Increased spacing */
}
header nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    font-family: var(--font-primary);
    font-size: 0.95rem; /* Slightly larger nav links */
    padding: 8px 0;
    position: relative;
    letter-spacing: 0.5px;
    transition: color 0.2s ease;
}
header nav ul li a.active,
header nav ul li a:hover {
    color: var(--primary-color);
}
header nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px; /* Closer to text */
    left: 0; /* Underline from left */
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
header nav ul li a.active::after,
header nav ul li a:hover::after {
    width: 100%;
}

/* --- MAIN CONTENT & SECTIONS --- */
main { padding-top: 120px; } /* Adjust based on header height */

.page-section {
    padding: 90px 0;
    overflow: hidden;
}
.page-section:nth-of-type(even) { background-color: var(--bg-color-alt); }


/* --- HERO SECTION --- */
.hero {
    min-height: 85vh; /* Taller hero */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    background: var(--bg-color); /* Solid dark */
}
.hero-title {
    font-size: clamp(2.8rem, 7vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.1;
}
.tagline {
    font-size: clamp(1.2rem, 3.5vw, 1.6rem);
    color: var(--text-secondary-color);
    font-family: var(--font-primary);
    font-weight: 300;
    max-width: 800px;
    line-height: 1.6;
}

/* --- ABOUT SECTION --- */
#about .about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    text-align: center;
}
#about .about-photo { /* If you add a photo */
    width: 200px; height: 200px; border-radius: 50%; object-fit: cover;
    border: 5px solid var(--primary-color); box-shadow: 0 0 25px var(--shadow-color);
}
#about .about-text p {
    font-size: clamp(1.05rem, 2.5vw, 1.2rem);
    color: var(--text-color);
    max-width: 850px; margin-left: auto; margin-right: auto;
}
@media (min-width: 992px) {
    #about .about-content { flex-direction: row; text-align: left; align-items: flex-start; }
    #about .about-photo { margin-right: 50px; }
}

/* --- FEATURED PROJECTS SECTION --- */
.featured-projects-section { background-color: var(--bg-color); } /* Match hero */

.featured-project-card {
    display: flex;
    flex-direction: column;
    gap: 40px; /* Increased gap */
    align-items: center;
    background-color: var(--bg-color-alt); /* Card on section bg */
    padding: 40px; /* More padding */
    border-radius: 16px; /* More rounded */
    box-shadow: var(--card-shadow);
    margin-bottom: 60px;
    border: 1px solid var(--border-color);
}
.featured-project-image-container {
    flex: 0 0 55%; /* Control width distribution */
    max-width: 600px;
    border-radius: 12px;
    overflow: hidden;
}
.featured-project-image {
    width: 100%;
    display: block;
    border-radius: 12px;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.featured-project-card:hover .featured-project-image { transform: scale(1.05); }

.featured-project-content {
    flex: 0 0 45%;
    text-align: left;
}
.featured-project-content h3 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    color: var(--primary-color);
    margin-bottom: 15px;
}
.featured-project-content .project-description {
    font-size: clamp(1rem, 2vw, 1.1rem);
    color: var(--text-secondary-color);
    margin-bottom: 25px;
}
.featured-project-content .technologies {
    font-size: 0.95rem;
    color: var(--text-secondary-color);
    margin-bottom: 30px;
    font-style: italic;
}
.featured-project-content .technologies strong {
    font-style: normal;
    color: var(--primary-color);
    font-weight: 500;
}
.view-all-projects-cta { text-align: center; margin-top: 20px; }

@media (min-width: 992px) {
    .featured-project-card { flex-direction: row; }
    .featured-project-card.reverse-layout { flex-direction: row-reverse; }
    .featured-project-card.reverse-layout .featured-project-content { text-align: right; }
    .featured-project-card.reverse-layout .card-links { justify-content: flex-end; }
}


/* --- GENERAL CTA BUTTONS --- */
.cta-button, .cta-button-secondary {
    display: inline-block;
    padding: 14px 35px; /* Slightly larger */
    border-radius: 8px; /* Less round, more modern blocky */
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1.05rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    letter-spacing: 0.5px;
    text-transform: uppercase; /* Modern touch */
}
.cta-button {
    background-color: var(--primary-color);
    color: #0A0A0A; /* Dark text on bright button */
    border-color: var(--primary-color);
}
.cta-button:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-strong-color);
    color: #0A0A0A;
}
.cta-button-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}
.cta-button-secondary:hover {
    background-color: var(--primary-color);
    color: #0A0A0A;
    transform: translateY(-3px);
}
.cta-button.large-cta { padding: 18px 45px; font-size: 1.15rem; }

/* --- OTHER PROJECTS (Card Grid) --- */
#other-projects { background-color: var(--bg-color); }
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
}
.card {
    background-color: var(--bg-color-alt);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px var(--shadow-strong-color);
    border-color: var(--primary-color);
}
.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 600;
    color: var(--text-color);
}
.card p { font-size: 0.95rem; margin-bottom: 18px; flex-grow: 1; }
.card .technologies { font-size: 0.85rem; margin-bottom: 20px; }
.card-links { margin-top: auto; }
.card-link { font-size: 0.9rem; }

/* --- SKILLS SECTION --- */
#skills { background-color: var(--bg-color-alt); }
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}
.skill-category {
    background-color: var(--bg-color);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}
.skill-category h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}
.skill-item {
    background-color: var(--bg-color-alt);
    color: var(--text-secondary-color);
    padding: 10px 20px;
    margin: 5px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-block; /* Allows items to sit next to each other better */
    transition: all 0.2s ease;
}
.skill-item:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

/* --- EXPERIENCE & EDUCATION (TIMELINE) --- */
.timeline-section { background-color: var(--bg-color); }
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 30px 0;
}
.timeline::after { /* The central line */
    content: '';
    position: absolute;
    width: 3px;
    background-color: var(--primary-color);
    opacity: 0.3;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1.5px;
}
.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}
.timeline-item::after { /* The circles on the timeline */
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--bg-color-alt);
    border: 3px solid var(--primary-color);
    top: 25px;
    border-radius: 50%;
    z-index: 1;
}
/* Place items on left and right */
.timeline-item:nth-child(odd) { left: 0; }
.timeline-item:nth-child(even) { left: 50%; }

.timeline-item:nth-child(even)::after { /* Adjust circle for right items */
    left: -10px;
}
.timeline-content {
    padding: 20px 30px;
    background-color: var(--bg-color-alt);
    position: relative;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}
.timeline-content:hover { border-color: var(--primary-color); }
.timeline-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}
.timeline-subtitle {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 5px;
}
.timeline-date {
    font-size: 0.85rem;
    color: var(--text-secondary-color);
    margin-bottom: 15px;
    font-style: italic;
}
.timeline-details {
    list-style-position: inside;
    padding-left: 0;
}
.timeline-details li {
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--text-secondary-color);
}
@media (max-width: 768px) { /* Stack timeline items on smaller screens */
    .timeline::after { left: 15px; }
    .timeline-item { width: 100%; padding-left: 50px; padding-right: 10px; }
    .timeline-item:nth-child(odd), .timeline-item:nth-child(even) { left: 0; }
    .timeline-item::after { left: 5px; }
}

/* --- CONTACT SECTION --- */
.contact-section { background-color: var(--bg-color-alt); }
.contact-intro {
    font-size: 1.15rem;
    max-width: 750px;
    margin: 0 auto 50px auto;
    text-align: center;
    color: var(--text-color);
}
.contact-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 50px;
}
@media (min-width: 992px) {
    .contact-content-wrapper { flex-direction: row; }
    .contact-form-container { flex: 2; }
    .contact-socials-container { flex: 1; padding-left: 40px; }
}

.contact-form-container {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary-color);
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color-alt);
    color: var(--text-color);
    font-size: 1rem;
    font-family: var(--font-secondary);
    transition: border-color 0.2s ease;
}
.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--shadow-color);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit-button { width: 100%; margin-top: 10px; }

#form-status { margin-top: 15px; text-align: center; font-weight: 500; }
#form-status.success { color: #28a745; } /* Green for success */
#form-status.error { color: #dc3545; } /* Red for error */

.contact-socials-container { text-align: center; }
.contact-socials-container h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}
.social-links {
    display: flex;
    flex-direction: column; /* Stack links */
    gap: 20px;
    align-items: center;
}
.social-icon-link {
    display: inline-flex; /* For icon and text alignment */
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    color: var(--text-secondary-color);
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s ease;
    width: 200px; /* Fixed width for consistency */
    justify-content: center;
}
.social-icon-link svg {
    margin-right: 8px; /* Space between icon and text if using inline SVG */
    transition: fill 0.2s ease;
}
.social-icon-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: var(--bg-color);
}
.social-icon-link:hover svg { fill: var(--primary-color); }

/* --- FOOTER --- */
footer {
    text-align: center;
    padding: 50px 0;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
}
footer p {
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: var(--text-secondary-color);
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 992px) {
    .featured-project-card { flex-direction: column !important; }
    .featured-project-content { text-align: center !important; }
    .featured-project-card .card-links { justify-content: center !important; }
}

@media (max-width: 768px) {
    header .container { flex-direction: column; gap: 15px; padding-bottom: 10px; }
    header nav { margin-top: 0; }
    header nav ul {
        flex-wrap: wrap; justify-content: center; gap: 0 20px;
    }
    header nav ul li { margin-left: 0; margin-bottom: 8px; }
    main { padding-top: 180px; /* More padding for taller stacked header */ }
    h2.section-title { font-size: clamp(1.8rem, 5vw, 2.5rem); margin-bottom: 50px; }
}