/* --- CSS Variables & Reset --- */
:root {
    --color-bg-main: #0a192f;
    /* Deep Navy Background */
    --color-bg-secondary: #112240;
    /* Slightly lighter navy for cards/sections */
    --color-text-primary: #ccd6f6;
    /* Light gray text */
    --color-text-secondary: #8892b0;
    /* Darker gray text */
    --color-accent: #64ffda;
    /* Vibrant Teal Accent */
    --font-main: 'Inter', sans-serif;
    --nav-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-main);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- General Utility Classes --- */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-pad {
    padding: 100px 0;
}

.bg-light {
    background-color: var(--color-bg-secondary);
}

h1,
h2,
h3,
h4 {
    color: var(--color-text-primary);
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.text-center {
    text-align: center;
}

.center-title {
    justify-content: center;
}

/* Section Titles */
.section-title {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    font-size: 1.8rem;
    white-space: nowrap;
}

.section-title span {
    color: var(--color-accent);
    font-family: monospace;
    margin-right: 15px;
    font-weight: 400;
    font-size: 1.5rem;
}

.section-title::after {
    content: "";
    display: block;
    width: 100%;
    height: 1px;
    background-color: var(--color-text-secondary);
    opacity: 0.3;
    margin-left: 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: rgba(100, 255, 218, 0.1);
}

.btn-secondary {
    color: var(--color-text-primary);
    margin-left: 15px;
}

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

/* --- Navigation --- */
.navbar {
    height: var(--nav-height);
    background-color: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--color-accent);
}

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

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 600;
}

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

.btn-nav {
    border: 1px solid var(--color-accent);
    padding: 8px 16px;
    border-radius: 4px;
    color: var(--color-accent) !important;
}

.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* --- Hero Section (UPDATED for no photo) --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: center;
    /* Center horizontally */
    min-height: calc(100vh - var(--nav-height));
}

.hero-content.no-photo-hero {
    max-width: 900px;
    /* Constrain width for better readability */
    text-align: center;
    /* Center text */
}

.hero-content h4 {
    color: var(--color-accent);
    font-family: monospace;
    font-weight: 400;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 15px;
}

.hero-content h2 {
    font-size: 3.5rem;
    color: var(--color-text-secondary);
    line-height: 1.1;
    margin-bottom: 30px;
}

.hero-content p {
    max-width: 600px;
    margin: 0 auto 40px auto;
    /* Center paragraph block */
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

.hero-btns.centered-btns {
    display: flex;
    justify-content: center;
    align-items: center;
}


/* --- Experience Timeline --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

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

.timeline-item {
    position: relative;
    padding-left: 40px;
    margin-bottom: 50px;
}

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 5px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-bg-main);
    border: 2px solid var(--color-accent);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.timeline-date {
    display: block;
    color: var(--color-text-secondary);
    font-family: monospace;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.timeline-content ul {
    list-style: disc outside;
    margin-left: 20px;
}

.timeline-content ul li {
    margin-bottom: 10px;
    color: var(--color-text-secondary);
}

/* --- Projects Grid --- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    display: block;
    background-color: var(--color-bg-main);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-7px);
}



.project-info {
    padding: 25px;
}

.project-info h3 {
    margin-bottom: 15px;
    color: var(--color-text-primary);
}

.project-tech {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-tech span {
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--color-accent);
}

.project-info p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.project-cta {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}



/* --- Skills --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.skill-category h3 {
    margin-bottom: 20px;
    color: var(--color-accent);
    font-size: 1.1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tags span {
    background-color: var(--color-bg-secondary);
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    transition: all 0.3s ease;
}

.skill-tags span:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

/* --- Achievements --- */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.achievement-box {
    background-color: var(--color-bg-main);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.icon-accent {
    color: var(--color-accent);
    font-size: 2rem;
    margin-bottom: 20px;
}

.achievement-box h3 {
    margin-bottom: 15px;
}

.achievement-box p,
.achievement-box li {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.achievement-box ul {
    list-style: disc outside;
    margin-left: 20px;
}


/* --- Contact & Footer --- */
.contact-section {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.big-btn {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.contact-details {
    margin-top: 60px;
    color: var(--color-text-secondary);
}

.contact-details p {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.contact-details i {
    color: var(--color-accent);
}

.footer-socials {
    margin-top: 30px;
    justify-content: center;
    font-size: 1.5rem;
    gap: 20px;
    display: flex;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--color-text-secondary);
    font-family: monospace;
    font-size: 0.8rem;
}


/* --- MOBILE RESPONSIVENESS --- */
@media screen and (max-width: 968px) {

    /* Mobile Nav */
    .hamburger {
        display: block;
        z-index: 200;
    }

    .nav-links {
        position: fixed;
        background: var(--color-bg-secondary);
        height: 100vh;
        width: 70%;
        top: 0;
        right: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.4s ease-in-out;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    }

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

    .nav-links li {
        margin: 25px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-title span {
        font-size: 1.3rem;
    }
}

@media screen and (max-width: 600px) {
    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-content h2 {
        font-size: 2.2rem;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .timeline-content h3 {
        font-size: 1.1rem;
    }
}