/* RESET & ACCESSIBILITY */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth; /* Smooth scrolling for anchor links */
}

/* Keyboard Navigation Focus Outline */
*:focus-visible {
    outline: 2px dashed var(--clr-accent-light);
    outline-offset: 4px;
}

/* VARIABLES */
:root {
    /* Colors */
    --clr-bg: #0f172a; /* Slate 900 */
    --clr-bg-alt: #1e293b; /* Slate 800 */
    --clr-card: rgba(255, 255, 255, 0.03);
    --clr-card-border: rgba(255, 255, 255, 0.1);
    --clr-white: #f8fafc;
    --clr-gray: #94a3b8;
    
    --clr-accent: #7c3aed; /* Violet 600 */
    --clr-accent-light: #a78bfa; /* Violet 400 */

    /* Typography */
    --ff-heading: 'Poppins', sans-serif;
    --ff-body: 'Inter', sans-serif;

    /* Font Sizes */
    --fs-h1: clamp(2.5rem, 5vw, 4rem); /* Responsive headings */
    --fs-h2: clamp(2rem, 4vw, 2.5rem);
    --fs-h3: 1.25rem;
    --fs-body: 1rem;

    /* Other */
    --radius: 12px;
    --transition: 0.3s ease;
}

/* CUSTOM SCROLLBAR (Webkit) */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--clr-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--clr-bg-alt);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--clr-accent);
}

/* BASE */
body {
    background: var(--clr-bg);
    color: var(--clr-gray); /* Softer text color for body to reduce eye strain */
    font-family: var(--ff-body);
    font-size: var(--fs-body);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    color: var(--clr-white);
    font-family: var(--ff-heading);
    font-weight: 700;
    line-height: 1.2;
}

strong {
    color: var(--clr-accent-light);
}

section {
    padding: 6em 2em;
    max-width: 1200px;
    margin: auto;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    display: block;
}

/* TYPOGRAPHY */
h1 { font-size: var(--fs-h1); margin-bottom: 0.25em;}
h2 { font-size: var(--fs-h2); margin-bottom: 1.5em; }
h3 { font-size: var(--fs-h3); margin-bottom: 0.5em;}

.section__title {
    text-align: center;
    margin-bottom: 0.2em;
}

.section__subtitle {
    text-align: center;
    color: var(--clr-accent-light);
    font-weight: 500;
    margin-bottom: 3em;
    font-size: 1.1rem;
}

/* BUTTONS */
.btn {
    padding: 0.8em 2em;
    background: var(--clr-accent);
    color: var(--clr-white);
    text-decoration: none;
    border-radius: 6px;
    font-family: var(--ff-heading);
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: 2px solid var(--clr-accent);
    cursor: pointer;
}

.btn:hover {
    background: var(--clr-accent-light);
    border-color: var(--clr-accent-light);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(124, 58, 237, 0.2);
}

.btn--outline {
    background: transparent;
    color: var(--clr-white);
}

.btn--outline:hover {
    background: var(--clr-accent);
    color: var(--clr-white);
}

/* HEADER & NAVIGATION */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5em 2em;
    position: sticky;
    top: 0;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.logo img {
    height: 40px; /* Adjust based on your logo size */
    width: auto;
}

.nav__list {
    display: flex;
    gap: 2em;
    list-style: none;
    align-items: center;
}

.nav__link {
    color: var(--clr-white);
    text-decoration: none;
    font-weight: 500;
    font-family: var(--ff-heading);
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition);
}

.nav__link:not(.nav__link--btn)::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 2px;
    background: var(--clr-accent-light);
    bottom: -5px;
    left: 0;
    transition: var(--transition);
}

.nav__link:not(.nav__link--btn):hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__link:hover {
    color: var(--clr-accent-light);
}

/* HAMBURGER MENU (For Mobile) */
.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5em;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 2em;
    height: 3px;
    background: var(--clr-white);
    border-radius: 1em;
    transition: transform 250ms ease-in-out;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
}
.hamburger::before { transform: translateY(-8px); }
.hamburger::after { transform: translateY(8px); }

/* HERO / INTRO */
.intro {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4em;
    min-height: 80vh;
}

.intro__content {
    flex: 1;
}

.section__title--intro {
    text-align: left;
}

.section__subtitle--intro {
    text-align: left;
    margin-bottom: 2em;
    font-size: 1.2rem;
}

.intro__cta {
    display: flex;
    gap: 1em;
    flex-wrap: wrap;
}

.intro__img {
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    border: 2px solid var(--clr-card-border);
}

/* SKILLS */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2em;
}

.service {
    background: var(--clr-card);
    padding: 2.5em 2em;
    border-radius: var(--radius);
    border: 1px solid var(--clr-card-border);
    transition: var(--transition);
}

.service:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--clr-accent);
}

.service i {
    font-size: 2.5rem;
    margin-bottom: 0.5em;
    color: var(--clr-accent-light);
}

.service-tech {
    color: var(--clr-white);
    font-family: var(--ff-heading);
    font-weight: 600;
    margin-bottom: 1em;
    font-size: 0.9rem;
}

/* ABOUT */
.about-me {
    display: flex;
    gap: 4em;
    align-items: center;
}

.about-me__body {
    flex: 1;
}

.about-me__body p {
    margin-bottom: 1.5em;
}

.education-highlight {
    background: var(--clr-card);
    padding: 1.5em;
    border-radius: var(--radius);
    border-left: 4px solid var(--clr-accent);
    margin-top: 2em;
}

.education-highlight h4 {
    margin-bottom: 0.5em;
}

.about-me__img {
    width: 100%;
    max-width: 350px;
    box-shadow: 10px 10px 0 var(--clr-accent);
}

/* WHY ME */
.why-me__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5em;
}

.why-me__item {
    background: var(--clr-card);
    padding: 2em 1.5em;
    border-radius: var(--radius);
    border: 1px solid var(--clr-card-border);
    text-align: center;
    transition: var(--transition);
}

.why-me__item:hover {
    border-color: var(--clr-accent-light);
}

.why-me__item i {
    color: var(--clr-accent);
    margin-bottom: 0.5em;
    font-size: 1.5rem;
}

/* PROJECTS / PORTFOLIO */
.portfolio {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2em;
}

.portfolio__item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    aspect-ratio: 4/3;
    border: 1px solid var(--clr-card-border);
}

.portfolio__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.5, 0, 0, 1);
}

.portfolio__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2em;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio__overlay h3 {
    color: var(--clr-accent-light);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.portfolio__overlay p, .portfolio__overlay span {
    color: var(--clr-white);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.portfolio__overlay span {
    display: block;
    margin-top: 1em;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.portfolio__item:hover .portfolio__overlay {
    opacity: 1;
}

.portfolio__item:hover .portfolio__img {
    transform: scale(1.1);
}

.portfolio__item:hover .portfolio__overlay h3,
.portfolio__item:hover .portfolio__overlay p,
.portfolio__item:hover .portfolio__overlay span {
    transform: translateY(0);
}

/* ACHIEVEMENTS */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2em;
}

.achievement-card {
    background: var(--clr-card);
    padding: 2.5em 2em;
    text-align: center;
    border-radius: var(--radius);
    border: 1px solid var(--clr-card-border);
}

.achievement-card i {
    color: var(--clr-accent);
    margin-bottom: 0.5em;
}

.achievement-card h3 {
    margin: 0.5em 0;
}

/* CONTACT FORM */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.2em;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1em;
    background: var(--clr-bg-alt);
    border: 1px solid var(--clr-card-border);
    border-radius: 6px;
    color: var(--clr-white);
    font-family: var(--ff-body);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--clr-gray);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--clr-accent-light);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.2);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* FOOTER */
.footer {
    text-align: center;
    padding: 4em 2em;
    background: var(--clr-bg-alt);
    border-top: 1px solid var(--clr-card-border);
}

.footer__title {
    margin-bottom: 0.5em;
}

.footer__link {
    color: var(--clr-accent-light);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    display: inline-block;
    margin: 1em 0;
}

.footer__link:hover {
    text-decoration: underline;
}

.social-list {
    display: flex;
    justify-content: center;
    gap: 1.5em;
    margin: 2em 0;
    list-style: none;
}

.social-list a {
    color: var(--clr-gray);
    font-size: 1.8rem;
    transition: var(--transition);
}

.social-list a:hover {
    color: var(--clr-accent-light);
    transform: scale(1.2) translateY(-3px);
}

.footer__copyright {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 2em;
}

/* MEDIA QUERIES (RESPONSIVE) */
@media (max-width: 800px) {
    .nav-toggle {
        display: block; /* Show hamburger on mobile */
        z-index: 1000;
    }

    .nav {
        position: fixed;
        background: var(--clr-bg-alt);
        top: 0;
        bottom: 0;
        right: 0;
        left: 0;
        z-index: 100;
        transform: translateX(100%); /* Hide menu off-screen initially */
        transition: transform 250ms cubic-bezier(.5, 0, .5, 1);
        display: flex;
        justify-content: center;
        align-items: center;
    }

    /* Class added by JS to show mobile menu */
    .nav--visible {
        transform: translateX(0);
    }

    .nav__list {
        flex-direction: column;
        align-items: center;
        gap: 3em;
    }

    .nav__link {
        font-size: 1.5rem;
    }

    .intro, .about-me {
        flex-direction: column;
        text-align: center;
    }

    .section__title--intro,
    .section__subtitle--intro {
        text-align: center;
    }

    .intro__cta {
        justify-content: center;
    }

    .about-me__img {
        box-shadow: 0 10px 0 var(--clr-accent); /* Adjusted shadow for mobile */
    }
}

/* SCROLL ANIMATION (Triggered via JS usually) */
.reveal {
    opacity: 0;
    transform: translateY(40px);
}

.reveal-active {
    animation: fadeUp 0.8s cubic-bezier(0.5, 0, 0, 1) forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* HAMBURGER 'X' ANIMATION */
.nav-toggle--open .hamburger {
    background: transparent;
}
.nav-toggle--open .hamburger::before {
    transform: rotate(45deg);
}
.nav-toggle--open .hamburger::after {
    transform: rotate(-45deg);
}