/* --- Global Styles --- */
html, body {
    width: 100%;
    overflow-x: hidden;
}
:root {
    --bg-color: #111111;
    --card-bg: #1a1a1a;
    --border-color: #2c2c2c;
    --text-color: #e0e0e0;
    --text-muted: #888888;
    --accent-color: #00ff8c;
    --accent-hover: #00e67e;
    --font-mono: 'Space Mono', monospace;
    --font-sans: 'Inter', sans-serif;
}

/* --- Global Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

h1, h2 {
    font-family: var(--font-mono);
    color: #ffffff;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; margin-bottom: 2rem; }

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--accent-hover);
}

section {
    padding: 6rem 0;
}

/* --- Header --- */
header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.2rem;
}
nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
nav a {
    color: var(--text-muted);
    font-weight: 600;
}
nav a:hover {
    color: var(--text-color);
}
.nav-button {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    color: var(--accent-color);
    transition: all 0.2s ease;
}
.nav-button:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
}
#light-mode-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
}
#light-mode-toggle:hover {
    color: var(--text-color);
}

/* --- Hero Section --- */
.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
}
.hero .tagline {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.cursor {
    display: inline-block;
    width: 10px;
    height: 1.5rem;
    background-color: var(--accent-color);
    margin-left: 5px;
    animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero .subtitle {
    font-size: 1.2rem;
    max-width: 60ch;
}

/* --- Projects Section --- */
#project-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}
.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.filter-btn:hover {
    color: var(--text-color);
    border-color: var(--accent-color);
}
.filter-btn.active {
    background-color: var(--accent-color);
    color: var(--bg-color);
    border-color: var(--accent-color);
}

#project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}
.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 350px; /* Fixed height for consistency */
    position: relative;
    transform-style: preserve-3d;
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2), 0 0 15px rgba(0, 255, 140, 0.1);
}
.card-content {
    padding: 1.5rem;
    height: 100%;
    width: 100%;
    position: absolute;
    backface-visibility: hidden;
    transition: transform 0.6s ease, opacity 0.6s ease;
}
.card-front {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.card-back {
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.project-card.expanded .card-front { transform: rotateY(180deg); }
.project-card.expanded .card-back { transform: rotateY(0deg); }

.project-card h3 {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}
.project-card .description {
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-grow: 1;
}
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}
.tag {
    background: rgba(0, 255, 140, 0.1);
    color: var(--accent-color);
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
}
.card-back p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}
.card-links {
    margin-top: auto;
    display: flex;
    gap: 1rem;
}
.card-links a {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-weight: 600;
}
.card-links a:hover {
    border-color: var(--accent-hover);
}

/* --- Content Sections (About, Achievements) --- */
.content-section p, .content-section ul {
    max-width: 70ch;
}
.content-section ul {
    list-style: none;
    padding-left: 0;
}
.content-section li {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

/* --- Contact Form --- */
#contact-form {
    max-width: 700px;
    margin: 0 auto;
}
.form-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}
#contact-form input, #contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-color);
    font-family: var(--font-sans);
    font-size: 1rem;
}
#contact-form input:focus, #contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}
.button {
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s ease;
}
.button:hover {
    background-color: var(--accent-hover);
}

/* --- Footer --- */
footer {
    border-top: 1px solid var(--border-color);
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
}

/* --- Utility & Insult Toast --- */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-200%);
    background: #ff4757;
    color: white;
    padding: 1rem 2rem;
    border-radius: 5px;
    z-index: 1000;
    font-family: var(--font-mono);
    opacity: 0;
    transition: transform 0.4s ease, opacity 0.4s ease;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }

    .header-content {
        /* Reduce side padding to give more room */
        padding: 0 1rem;
    }

    nav {
        /* Make the gap between nav items smaller */
        gap: 0.75rem;
    }

    nav a {
        font-size: 0.9rem;
    }

    .nav-button {
        /* Reduce the padding on the resume button */
        padding: 0.35rem 0.6rem;
    }

    #light-mode-toggle {
        /* Reduce padding around the icon slightly */
        padding: 0.4rem;
    }

    section {
        padding: 4rem 0;
    }

    .container {
        padding: 0 1rem;
    }

    .form-group {
        grid-template-columns: 1fr;
    }
}

/* === VISUAL UPGRADES START HERE === */

/* --- 1. Interactive Mouse Aurora --- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: radial-gradient(
        600px circle at var(--mouse-x) var(--mouse-y),
        rgba(0, 255, 140, 0.06),
        transparent 40%
    );
    z-index: -1;
    transition: background 0.1s linear;
}


/* --- 2. Hero Text Typing Animation --- */
/* (We already have the cursor, so no new CSS needed for this part!) */


/* --- 3. Scroll-Reveal Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Add a delay for elements in a grid */
#project-grid .project-card {
    transition-delay: var(--delay, 0s);
}


/* --- 4. Enhanced Micro-interactions --- */
/* Button Glow */
.button:hover, .nav-button:hover {
    box-shadow: 0 0 15px 0 rgba(0, 255, 140, 0.4);
}

/* Nav Link Underline */
nav a:not(.nav-button) {
    position: relative;
}

nav a:not(.nav-button)::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}

nav a:not(.nav-button):hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}