/* Root Variables - Mac Terminal Theme */
:root {
    --bg-color: #1e1e1e;
    /* VS Code / Terminal Dark */
    --window-header: #323233;
    --text-primary: #f8f8f2;
    --text-secondary: #a9b7c6;
    --accent: #27c93f;
    /* Terminal Green */
    --accent-blue: #57c7ff;
    /* Terminal Blue folder style */
    --accent-yellow: #ffbd2e;
    /* Command warning/highlight */
    --urgent: #ff5f56;
    /* Error/Exit */
    --border: #3e3e42;
    --font-main: 'Menlo', 'Monaco', 'Courier New', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow-x: hidden;
    font-size: 15px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.2s;
}

ul {
    list-style: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 5px;
}

/* Header & Nav */
header {
    background: var(--window-header);
    border-bottom: 1px solid #111;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    color: var(--text-primary);
    display: flex;
    gap: 15px;
    align-items: center;
}

.window-controls {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.dot.red {
    background-color: #ff5f56;
}

.dot.yellow {
    background-color: #ffbd2e;
}

.dot.green {
    background-color: #27c93f;
}

/* Reset logo text to look like a terminal title */
.logo span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: var(--font-main);
}

.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.nav-links a::before {
    content: './';
    opacity: 0.5;
}

/* Sections Global */
section {
    padding: 40px 10%;
    /* Reduced padding */
    min-height: auto;
    /* Remove forced full height to compact space */
    border-bottom: 1px solid var(--border);
    scroll-margin-top: 100px;
    /* Offset for sticky header */
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: var(--accent-yellow);
}

.section-title::before {
    content: '➜  ';
    color: var(--accent);
}

/* Hero Section */
#hero {
    min-height: 100vh;
    /* Full viewport height */
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    align-items: center;
    width: 100%;
    max-width: 1200px;
}

.intro-text p.greeting {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.intro-text h1 {
    font-size: 3rem;
    color: var(--accent);
    margin: 5px 0;
    text-shadow: 0 0 10px rgba(39, 201, 63, 0.4);
}

.animate-text {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    border-right: 2px solid var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    animation: blink 0.75s step-end infinite;
    display: inline-block;
    width: fit-content;
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

.bio {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 25px;
    max-width: 550px;
    font-family: inherit;
}

.bio span {
    color: var(--accent-blue);
    border: none;
    font-weight: bold;
}

.cta-group {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 20px;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    transition: 0.2s;
    text-transform: uppercase;
}

.primary-btn {
    background: rgba(39, 201, 63, 0.1);
}

.primary-btn:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px var(--accent);
}

.secondary-btn {
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}

.secondary-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* Penguin Interaction */
.penguin-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-self: center;
    /* Center in grid cell */
}

.penguin-container {
    position: relative;
    width: 250px;
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    /* Remove auto margins since wrapper centers it */
    border: 2px solid var(--border);
    /* Define the circle */
    border-radius: 50%;
    overflow: hidden;
    /* Clips the square image to the circle */
    background: var(--bg-color);
    /* Match background */
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

#penguinImage {
    width: 100%;
    height: 100%;
    /* Fill container */
    object-fit: cover;
    /* Ensure no whitespace */
    transform: scale(1.02);
    /* Slight zoom to prevent edge bleeding */
    cursor: grab;
    filter: grayscale(100%) contrast(1.2);
    /* Terminal style monochrome-ish */
    transition: filter 0.3s, transform 0.2s;
}

#penguinImage:hover {
    filter: grayscale(0%) contrast(1);
}

.penguin-instruction {
    text-align: center;
    margin-top: 15px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: monospace;
    opacity: 0.8;
}

/* About / Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.skill-category {
    background: #000;
    padding: 15px;
    border: 1px solid var(--border);
}

.skill-category h4 {
    margin-bottom: 12px;
    color: var(--accent-blue);
    border-bottom: 1px solid var(--border);
    padding-bottom: 5px;
    display: inline-block;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tags span {
    font-size: 0.8rem;
    color: var(--text-primary);
}

.tags span::before {
    content: '>';
    color: var(--accent);
    margin-right: 4px;
}

/* Experience Timeline */
.timeline {
    border-left: 1px solid var(--border);
    margin-left: 10px;
    padding-left: 20px;
}

.timeline-item {
    margin-bottom: 30px;
}

.timeline-item::before {
    background: #000;
    border: 2px solid var(--accent);
    width: 10px;
    height: 10px;
    left: -26px;
    top: 5px;
}

.timeline-date {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: inherit;
}

.timeline-content h4 {
    color: var(--text-primary);
}

.company {
    color: var(--accent-blue);
}

.timeline-content ul {
    list-style: none;
    /* Custom markers */
    margin-left: 0;
}

.timeline-content ul li::before {
    content: '$ ';
    color: var(--accent-yellow);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

a.project-card-link {
    text-decoration: none;
    display: flex;
    height: 100%;
}

.project-card {
    background: #000;
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: 0;
    transition: 0.2s;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 4px 4px 0 rgba(39, 201, 63, 0.2);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-bottom: 1px dashed var(--border);
    padding-bottom: 10px;
    gap: 10px;
}

.card-header h4 {
    color: var(--accent);
}

.project-tag {
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 4px;
    background: #111;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    white-space: nowrap;
    /* Prevent wrapping */
    height: 26px;
    /* Fixed height for alignment */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    text-align: center;
    flex-shrink: 0;
}

.project-card p {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.project-card ul li::before {
    content: '* ';
    color: var(--text-secondary);
}

.project-card ul {
    color: var(--text-secondary);
}

/* Research */
.research-card {
    background: #000;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-yellow);
    padding: 20px;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 60px 0;
    text-align: center;
    background: var(--bg-color);
}

.terminal-command-line {
    font-size: 1.4rem;
    margin-bottom: 30px;
    font-family: var(--font-main);
}

.prompt-user {
    color: var(--accent-blue);
}

.prompt-cmd {
    color: var(--text-primary);
    animation: blink 1s step-end infinite;
    /* Blinking cursor effect on command */
    border-right: 10px solid var(--text-primary);
    /* Block cursor */
    padding-right: 5px;
}

.social-links {
    margin: 30px 0;
    display: flex;
    justify-content: center;
    gap: 60px;
    /* Wide spacing */
}

.social-links a {
    font-size: 1.3rem;
    /* Larger font */
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.social-links a:hover {
    color: var(--accent);
    background: transparent;
    text-shadow: 0 0 10px var(--accent-glow);
}

.live-clock {
    color: var(--accent-blue);
    font-family: var(--font-main);
    font-size: 1rem;
    margin-top: 20px;
}

.copyright {
    color: #555;
    font-size: 0.8rem;
    margin-top: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .nav-links {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        width: 100%;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .penguin-container {
        margin: 20px auto;
        width: 250px;
        height: 250px;
        border: 2px solid var(--border);
        background: var(--bg-color);
        /* Match theme to prevent gaps */
    }

    .social-links {
        gap: 30px;
        flex-direction: column;
    }
}