/* ============================================= */
/* ============= 1. GLOBAL STYLES ============== */
/* ============================================= */
:root {
    --neon-blue: #00BFFF;
    --electric-green: #39FF14;
    --cyber-purple: #9457EB;
    --dark-bg: #111827;
    --darker-bg: #000000;
    --card-bg: #1f2937;
    --border-color: #374151;
    --text-light: #d1d5db;
    --text-dark: #9ca3af;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--darker-bg);
    color: white;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.section-heading {
    font-size: clamp(2.5rem, 5vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
}

.hidden {
    display: none;
}

/* Text Color Utilities */
.text-neon-blue {
    color: var(--neon-blue);
}

.text-electric-green {
    color: var(--electric-green);
}

.text-cyber-purple {
    color: var(--cyber-purple);
}

/* ============================================= */
/* ============= 2. ANIMATIONS ================= */
/* ============================================= */

/* Fade-in & Slide-up Animation */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation delays */
.is-visible .animate-on-scroll:nth-child(1) {
    transition-delay: 0.1s;
}

.is-visible .animate-on-scroll:nth-child(2) {
    transition-delay: 0.2s;
}

.is-visible .animate-on-scroll:nth-child(3) {
    transition-delay: 0.3s;
}

.is-visible .animate-on-scroll:nth-child(4) {
    transition-delay: 0.4s;
}

.is-visible .animate-on-scroll:nth-child(5) {
    transition-delay: 0.5s;
}


/* Hero Section Load Animation */
.hero-content h1,
.hero-content p,
.hero-content .btn-glow-hero {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.loaded .hero-content h1 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.2s;
}

.loaded .hero-content .subtitle {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

.loaded .hero-content p:not(.subtitle) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.6s;
}

.loaded .hero-content .btn-glow-hero {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.8s;
}

/* SVG Floating Animation */
@keyframes float {

    0%,
    100% {
        transform: translateY(-20px);
    }

    50% {
        transform: translateY(0);
    }
}

/* Toast Notification Animation */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    padding: 16px;
    border-radius: 8px;
    color: white;
    opacity: 0;
    transform: translateX(100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
    min-width: 300px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    background-color: #28a745;
}

.toast-destructive {
    background-color: #dc3545;
}

.toast-content {
    margin-left: 12px;
}

.toast-title {
    font-weight: 600;
}

.toast-description {
    font-size: 0.875rem;
}


/* ============================================= */
/* ================ 3. NAVIGATION ================ */
/* ============================================= */
.main-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    border-bottom: 1px solid var(--border-color);
    color: white;
}

.nav-container {
    max-width: 1280px;
    margin: auto;
    padding: 1rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--neon-blue);
}

.desktop-nav {
    display: none;
    /* Hidden on mobile */
    gap: 2rem;
}

.nav-link {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--neon-blue);
}

.mobile-menu-button {
    display: block;
    /* Shown on mobile */
}

#menu-button {
    background: none;
    border: none;
    color: var(--neon-blue);
    cursor: pointer;
}

#menu-button svg {
    width: 24px;
    height: 24px;
}

#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#mobile-menu.is-open {
    max-height: 500px;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 0 1rem 1rem;
}

.mobile-nav-links .nav-link {
    text-align: left;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
    }

    .mobile-menu-button {
        display: none;
    }

    #mobile-menu {
        display: none;
    }
}


/* ============================================= */
/* ================ 4. HERO SECTION ============== */
/* ============================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
    background: radial-gradient(circle, #000000 50%, #0d0d0d 100%);
}

.hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.5), transparent);
    z-index: 1;
}

.animated-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.animated-bg svg {
    position: absolute;
    opacity: 0.2;
    animation: float 6s ease-in-out infinite;
    z-index: 0;
}

.svg1 {
    top: 20%;
    left: 15%;
    width: 250px;
    height: 250px;
}

.svg2 {
    bottom: 20%;
    right: 15%;
    width: 200px;
    height: 200px;
    animation-delay: -2s;
    opacity: 0.15;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-name-highlight {
    color: var(--neon-blue);
}

.hero-content .subtitle {
    color: var(--cyber-purple);
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.btn-glow-hero {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    text-decoration: none;
    background-color: transparent;
    border: 2px solid var(--neon-blue);
    color: white;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px var(--neon-blue), 0 0 10px var(--neon-blue) inset;
}

.btn-glow-hero:hover {
    background-color: var(--neon-blue);
    color: var(--darker-bg);
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--neon-blue), 0 0 25px var(--neon-blue);
}

/* ============================================= */
/* ================ 5. ABOUT SECTION ============== */
/* ============================================= */
.about-section {
    padding: 80px 20px;
    background: linear-gradient(to bottom, #000000, #1a1a1a);
}

.about-container {
    max-width: 1200px;
    margin: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
}

.profile-img {
    width: 100%;
    max-width: 350px;
    border-radius: 20px;
    display: block;
    margin: auto;
    box-shadow: 0 0 15px var(--neon-blue);
}

.about-details .card {
    background-color: rgba(40, 40, 40, 0.8);
    padding: 24px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
}

.card h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.card p,
.card ul {
    color: #ccc;
    font-size: 1rem;
    line-height: 1.6;
}

.card ul {
    list-style: none;
}

.goal-text {
    color: var(--electric-green);
    font-weight: 500;
}

.education-details {
    color: var(--neon-blue);
}

.experience-desc {
    font-size: 0.9rem;
}

.resume-button-container {
    text-align: center;
}

.btn-download {
    display: inline-block;
    background-color: transparent;
    border: 2px solid var(--neon-blue);
    padding: 12px 24px;
    font-weight: bold;
    color: white;
    border-radius: 999px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background-color: var(--neon-blue);
    color: black;
    transform: scale(1.05);
}

@media (min-width: 768px) {
    .about-container {
        grid-template-columns: 1fr 1.5fr;
    }
}

/* ============================================= */
/* ================ 6. SKILLS SECTION ============ */
/* ============================================= */
.skills-section {
    padding: 5rem 0;
    background-color: #0d1117;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.skill-tag {
    background-color: rgba(40, 40, 40, 0.5);
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    color: white;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    opacity: 0;
    transform: scale(0.8);
}

.skills-grid.is-visible .skill-tag {
    opacity: 1;
    transform: scale(1);
}

.skill-tag:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 191, 255, 0.6);
}

.skill-tag:active {
    transform: scale(0.95);
}

.skill-tag .skill-icon {
    font-size: 1.25rem;
}

/* ============================================= */
/* ============== 7. PROJECTS SECTION ============ */
/* ============================================= */
.projects-section {
    padding: 5rem 0;
    background: linear-gradient(to bottom, #0d1117, #000000);
}

.projects-grid {
    display: grid;
    gap: 2rem;
}

.project-card {
    background-color: rgba(40, 40, 40, 0.3);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px 5px rgba(0, 191, 255, 0.2);
}

.project-image {
    width: 100%;
    height: 256px;
    object-fit: cover;
}

.project-content {
    padding: 2rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--neon-blue);
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-details {
    margin-bottom: 1.5rem;
}

.project-subheading {
    font-weight: 600;
    color: white;
    margin-bottom: 0.75rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
}

.tech-tag.python {
    background-color: rgba(0, 191, 255, 0.2);
    color: var(--neon-blue);
}

.tech-tag.pandas {
    background-color: rgba(148, 87, 235, 0.2);
    color: var(--cyber-purple);
}

.tech-tag.numpy {
    background-color: rgba(57, 255, 20, 0.2);
    color: var(--electric-green);
}

.tech-tag.sklearn {
    background-color: rgba(0, 191, 255, 0.2);
    color: var(--neon-blue);
}

.tech-tag.matplotlib {
    background-color: rgba(148, 87, 235, 0.2);
    color: var(--cyber-purple);
}

.tech-tag.seaborn {
    background-color: rgba(57, 255, 20, 0.2);
    color: var(--electric-green);
}

.project-buttons {
    display: flex;
    gap: 1rem;
}

.interactive-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid;
    background: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}

.interactive-btn:hover {
    transform: scale(1.05);
}

.interactive-btn:active {
    transform: scale(0.95);
}

.interactive-btn svg {
    width: 16px;
    height: 16px;
}

.code-btn {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
}

.code-btn:hover {
    background-color: var(--neon-blue);
    color: black;
}

.demo-btn {
    border-color: var(--cyber-purple);
    color: var(--cyber-purple);
}

.demo-btn:hover {
    background-color: var(--cyber-purple);
    color: white;
}

.placeholder-card {
    background-color: rgba(25, 31, 43, 0.5);
    border: 2px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    transition: border-color 0.3s ease;
}

.placeholder-card:hover {
    border-color: var(--neon-blue);
}

.placeholder-icon {
    width: 3.75rem;
    height: 3.75rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.placeholder-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
}

.placeholder-description {
    color: var(--text-dark);
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .main-project {
        grid-column: span 2 / span 2;
    }
}

/* ============================================= */
/* ============== 8. CONTACT SECTION ============= */
/* ============================================= */
.contact-section {
    padding: 5rem 0;
    background-color: var(--darker-bg);
}

.contact-grid {
    display: grid;
    gap: 3rem;
}

.glow-card-contact {
    border: 1px solid transparent;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: rgba(25, 31, 43, 0.5);
    border-radius: 1rem;
    padding: 2rem;
}

.glow-card-contact:hover {
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px 5px rgba(0, 191, 255, 0.2);
}

.form-container h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-description {
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.contact-form-fields {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-form-fields label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.contact-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: white;
    background-color: rgba(40, 40, 40, 0.5);
    border: 1px solid rgba(0, 191, 255, 0.3);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.contact-input:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 0 2px rgba(0, 191, 255, 0.3);
}

textarea.contact-input {
    resize: none;
}

.btn-glow-contact {
    width: 100%;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    color: white;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--neon-blue);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.btn-glow-contact:hover {
    background-color: #00a8e6;
    box-shadow: 0 0 20px 5px rgba(0, 191, 255, 0.4);
}

.btn-glow-contact:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-glow-contact svg {
    margin-right: 0.5rem;
    width: 16px;
    height: 16px;
}

.info-cards-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.info-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-icon-bg {
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.info-icon-bg.email {
    background-color: rgba(0, 191, 255, 0.2);
}

.info-icon-bg.phone {
    background-color: rgba(57, 255, 20, 0.2);
}

.info-icon {
    width: 20px;
    height: 20px;
}

.info-item .info-icon-bg.email .info-icon {
    color: var(--neon-blue);
}

.info-item .info-icon-bg.phone .info-icon {
    color: var(--electric-green);
}

.info-item p {
    color: var(--text-dark);
    font-size: 0.875rem;
}

.info-item a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

.info-item a:hover {
    color: var(--neon-blue);
}

.social-links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid;
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.social-link svg {
    width: 16px;
    height: 16px;
}

.social-link.linkedin {
    border-color: #0a66c2;
    color: #38a1f2;
    background-color: rgba(10, 102, 194, 0.2);
}

.social-link.linkedin:hover {
    background-color: #0a66c2;
    color: white;
}

.social-link.github {
    border-color: #6e7681;
    color: #adbac7;
    background-color: rgba(110, 118, 129, 0.2);
}

.social-link.github:hover {
    background-color: #6e7681;
    color: white;
}

.social-link.leetcode {
    border-color: #f7a41e;
    color: #ffc256;
    background-color: rgba(247, 164, 30, 0.2);
}

.social-link.leetcode:hover {
    background-color: #f7a41e;
    color: white;
}

.social-link.resume {
    border-color: #16a34a;
    color: #4ade80;
    background-color: rgba(22, 163, 74, 0.2);
}

.social-link.resume:hover {
    background-color: #16a34a;
    color: white;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================= */
/* ================== 9. FOOTER ================== */
/* ============================================= */
.main-footer {
    background-color: #0d1117;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}

.footer-content {
    text-align: center;
    color: var(--text-dark);
}