/* ---
Modern Portfolio Stylesheet (Corrected)
--- */

/* --- Google Font Import: Inter --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Variables: New Color Palette --- */
:root {
    --bg-color: #0d1117; /* GitHub Dark Background */
    --primary-card-color: #161b22; /* GitHub Dark Card */
    --border-color: #30363d; /* GitHub Dark Border */
    --accent-gradient: linear-gradient(45deg, #232686, #5138a5); /* Blue Accent */
    --accent-color-primary: #383ca5;
    --text-primary: #c9d1d9; /* Main text */
    --text-secondary: #8b949e; /* Lighter grey for subtext */
    --text-highlight: #ffffff; /* Pure white for headers */
    --border-radius-main: 12px; /* Slightly more rounded */
    --box-shadow-main: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* --- General & Body --- */
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.7;
}

/* --- Header & Vanta Background --- */
header {
    position: relative;
    text-align: center;
    padding: 8rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    border-bottom: 1px solid var(--border-color);
}
.header-content {
    position: relative;
    z-index: 2; /* Keep content above Vanta */
    padding: 2.5rem 4rem; /* Keep padding for spacing */
}
header h1 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-highlight);
    margin-bottom: 0.5rem;
    transition: transform 0.3s ease;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.7); /* Shadow for readability */
}
header h1:hover {
    transform: scale(1.05);
}
header p {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--accent-color-primary);
    letter-spacing: 0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6); /* Shadow for readability */
}
.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1.3rem;
    background: var(--accent-color-primary);
    animation: blink 1s infinite;
    margin-left: 5px;
    position: relative;
    top: 4px;
}
@keyframes blink {
    50% { background-color: transparent; }
}

/* --- Navigation Bar --- */
nav {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    gap: 2.5rem;
}
nav a {
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
}
nav a:hover {
    color: var(--text-highlight);
    transform: translateY(-2px);
}
.social-icon {
    width: 28px;
    height: 28px;
}
.music-player {
    position: absolute;
    right: 1rem;
    top: 2rem;
    background-color: #1c1c1c;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 999;
    transition: all 0.3s ease;
}

.music-player.sticky {
      position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    border-radius: 8px 0 0 8px;
}

#play-button,
#pause-button {
    font-size: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    background: #383ca5;
    color: white;
    border: none;
    border-radius: 5px;
    margin: 0.2rem 0;
}

.hidden {
    display: none;
}


/* --- Main Content & Section Layout --- */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}
section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* --- About Me Section --- */
#about {
    max-width: 100%;
    padding: 5rem 2rem;
    background-color: var(--primary-card-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
#about h2 {
    margin-bottom: 3rem;
}
.about-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 3rem;
}
.headshot {
    width: 200px; /* wider than height for rectangle */
    height: 300px; /* keep same height */
    border-radius: 12px; /* small rounded corners instead of circle */
    object-fit: cover;
    border: 4px solid var(--border-color);
    box-shadow: var(--box-shadow-main);
    transition: transform 0.3s ease;
}
.headshot:hover {
    transform: scale(1.05);
}
.about-text {
    text-align: left;
}
.button-about {
    margin-top: 1.5rem;
    display: inline-block;
}

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

/* --- Headings --- */
h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 3rem;
    color: var(--text-highlight);
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}
h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-image: var(--accent-gradient);
    border-radius: 2px;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    padding: 1rem 0;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 10px;
    height: calc(100% - 15px);
    width: 2px;
    background: var(--border-color);
}
.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    opacity: 0;
}
.timeline-item::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 0px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color-primary);
    border: 5px solid var(--bg-color);
    z-index: 1;
}
.timeline-content {
    position: relative;
    margin-left: 50px;
}
.timeline-content h3 {
    margin-top: 0;
    color: var(--text-highlight);
    font-size: 1.4rem;
    font-weight: 600;
}
.timeline-content h4 {
    margin: 0.25rem 0 0.75rem 0;
    color: var(--text-secondary);
    font-weight: 500;
}
.timeline-content ul {
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}
.timeline-content ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}
.timeline-content ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-color-primary);
}

/* --- Project Cards --- */
.project {
    background-color: var(--primary-card-color);
    margin-bottom: 2.5rem;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-main);
    transition: transform 0.3s ease, border-color 0.3s ease;
    opacity: 0;
}
.project:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color-primary);
}
.project h3 {
    margin-top: 0;
    font-size: 1.75rem;
}
.project p {
    color: var(--text-secondary);
}
.project .award {
    background: rgba(46, 160, 67, 0.15);
    border: 1px solid var(--accent-color-primary);
    color: var(--text-highlight);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    display: inline-block;
    margin: 1rem 0;
    font-weight: 500;
}
.demo-preview {
    text-align: center;
    margin-top: 1rem;
}

.demo-caption {
    font-size: 0.95rem;
    color: #999;
    margin-bottom: 0.3rem;
}

.demo-thumbnail {
    width: 60%;
    max-width: 500px;
    border-radius: 8px;
    cursor: pointer;
    opacity: 0.85;
    transition: transform 0.2s ease, opacity 0.2s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.demo-thumbnail:hover {
    opacity: 1;
    transform: scale(1.015);
}

/* Lightbox styling */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 60px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
}

.lightbox-content {
    display: block;
    margin: auto;
    max-width: 90%;
    max-height: 80%;
    border-radius: 10px;
}

.close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.close:hover {
    color: #ccc;
}

/* --- Tech Tags & Buttons --- */
.tech-tags {
    margin: 1.5rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.tech-tags span {
    background-color: transparent;
    color: var(--accent-color-primary);
    border: 1px solid var(--accent-color-primary);
    padding: 0.3rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 500;
}
.button {
    display: inline-block;
    background-image: var(--accent-gradient);
    color: var(--text-highlight) !important;
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: none;
}
.button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(46, 160, 67, 0.4);
}

/* Button row layout (add this!) */
.button-row {
    display: flex;
    gap: 12px;
    margin-top: 1rem;
}

/* --- Footer & Scroll Button --- */
footer {
    text-align: center;
    padding: 3rem 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}
.contact-info a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}
.contact-info a:hover {
    color: var(--accent-color-primary);
    text-decoration: underline;
}
#scroll-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background-image: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 999;
}
#scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}
#scroll-to-top:hover {
    transform: scale(1.1);
}

/* --- Animation --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Responsive Media Query --- */
@media (max-width: 768px) {
    .about-container {
        flex-direction: column;
        text-align: center;
    }
    .about-text {
        text-align: center;
    }
    .button-about {
        margin-left: auto;
        margin-right: auto;
    }
    header h1 {
        font-size: 3rem;
    }
    .header-content {
        padding: 2rem;
    }
}