:root {
    /* Premium Dark Theme Palette */
    --bg-primary: #0f172a;
    /* Deep Slate */
    --bg-secondary: #1e293b;
    /* Lighter Slate */
    --bg-card: rgba(30, 41, 59, 0.7);
    /* Glassy Card */
    --accent: #38bdf8;
    /* Sky Blue */
    --accent-glow: rgba(56, 189, 248, 0.15);
    --text-main: #f1f5f9;
    /* Off-white */
    --text-muted: #94a3b8;
    /* Slate Grey */
    --border: rgba(255, 255, 255, 0.05);
    --nav-bg: rgba(15, 23, 42, 0.85);

    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(56, 189, 248, 0.03) 0%, transparent 20%);
}

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

ul {
    list-style: none;
}

/* --- Navigation --- */
nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 10%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-main), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-main);
}

/* --- Hero Section --- */
header {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 10%;
    position: relative;
}

.hero-subtitle {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

h1 {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

h1 span {
    color: var(--text-muted);
}

.hero-description {
    max-width: 600px;
    color: var(--text-muted);
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
}

.cta-group {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-primary);
    border: 2px solid var(--accent);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* --- General Section Styles --- */
section {
    padding: 6rem 10%;
}

.section-header {
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-main);
}

.section-line {
    height: 1px;
    background: var(--border);
    flex-grow: 1;
    max-width: 300px;
}

/* --- About --- */
.about-content {
    max-width: 800px;
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* --- Skills --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    /* Changed to pointer for interactivity */
    position: relative;
    overflow: hidden;
}

.skill-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.skill-card i {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
    display: block;
}

.skill-name {
    font-weight: 600;
    font-size: 0.95rem;
}

/* --- Experience --- */
.timeline {
    position: relative;
    max-width: 900px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--border);
}

.job-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 4rem;
}

.job-item::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--bg-primary);
}

.job-header {
    margin-bottom: 1rem;
}

.job-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
}

.job-company {
    color: var(--accent);
    font-weight: 600;
    font-size: 1.1rem;
}

.job-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
    font-family: monospace;
}

.job-desc {
    color: var(--text-muted);
}

.job-desc ul {
    list-style: none;
}

.job-desc li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
}

.job-desc li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* --- Education --- */
.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
}

/* --- Contact --- */
.contact-container {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.social-links a {
    font-size: 1.8rem;
    color: var(--text-muted);
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--accent);
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1rem;
}

.modal-description {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-tag {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 1024px) {
    h1 {
        font-size: 4rem;
    }

    section {
        padding: 5rem 8%;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 3rem;
    }

    section {
        padding: 4rem 6%;
    }

    header {
        padding: 0 6%;
    }

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 70%;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .cta-group {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .cta-group .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.5rem;
    }

    section {
        padding: 3rem 5%;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
    }

    .skill-card {
        padding: 1rem;
    }

    .job-item {
        padding-left: 2rem;
    }

    .job-title {
        font-size: 1.2rem;
    }
}