/* ===========================
   GLOBAL STYLES & VARIABLES
   =========================== */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --dark-bg: #0f0f1e;
    --lighter-bg: #1a1a2e;
    --card-bg: #16213e;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1a1;
    --border-color: #333;
    --success-color: #06b6d4;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===========================
   ANIMATED BACKGROUND
   =========================== */

.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        ellipse at 20% 50%,
        rgba(102, 126, 234, 0.1) 0%,
        transparent 50%
    ),
    radial-gradient(
        ellipse at 80% 80%,
        rgba(240, 147, 251, 0.1) 0%,
        transparent 50%
    );
    pointer-events: none;
    z-index: -1;
}

/* ===========================
   TYPOGRAPHY & UTILITIES
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 50px;
    text-align: center;
    font-weight: 700;
}

.title-accent {
    color: var(--primary-color);
    font-weight: 700;
    margin-right: 15px;
}

/* ===========================
   NAVIGATION BAR
   =========================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(15, 15, 30, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
}

.logo-text {
    background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #f093fb);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 60px;
}

.hero-text {
    animation: slideInLeft 0.8s ease;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-3px);
}

.social-links {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.social-icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 2px solid rgba(102, 126, 234, 0.2);
}

.social-icon:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.hero-image {
    animation: slideInRight 0.8s ease;
    display: flex;
    justify-content: center;
}

.image-wrapper {
    position: relative;
    width: 300px;
    height: 350px;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    border: 2px solid rgba(102, 126, 234, 0.2);
    animation: float 3s ease-in-out infinite;
}

.image-glow {
    position: absolute;
    inset: -10px;
    background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    border-radius: 15px;
    opacity: 0.3;
    filter: blur(15px);
    z-index: -1;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

/* ===========================
   SECTIONS STYLING
   =========================== */

section {
    padding: 100px 0;
    position: relative;
}

section:nth-child(even) {
    background: rgba(26, 26, 46, 0.5);
}

/* ===========================
   ABOUT SECTION
   =========================== */

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-box {
    background: rgba(102, 126, 234, 0.1);
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.stat-box:hover {
    background: rgba(102, 126, 234, 0.15);
    transform: translateX(10px);
}

.stat-box h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-box p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===========================
   EDUCATION SECTION
   =========================== */

.education-timeline {
    position: relative;
    padding: 20px 0;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), transparent);
    transform: translateX(-1px);
}

.timeline-item {
    margin-bottom: 50px;
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.timeline-item:nth-child(even) .timeline-content {
    order: -1;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid var(--dark-bg);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 0 8px rgba(102, 126, 234, 0.1);
}

.timeline-content {
    background: rgba(102, 126, 234, 0.05);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid rgba(102, 126, 234, 0.2);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-5px);
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.institution {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.duration {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.description {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===========================
   EXPERIENCE SECTION
   =========================== */

.internship-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 28px;
    padding: 36px;
    border: 1px solid rgba(102, 126, 234, 0.28);
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.12), rgba(240, 147, 251, 0.06));
}

.internship-icon, .skill-icon {
    color: var(--primary-color);
}

.internship-icon {
    width: 54px;
    height: 54px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: rgba(102, 126, 234, 0.16);
    font-size: 1.5rem;
}

.experience-heading {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 14px;
}

.experience-heading h3 { font-size: 1.5rem; }
.experience-label { color: var(--accent-color); font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.experience-type, .skill-level { color: var(--primary-color); font-size: .78rem; font-weight: 600; }
.experience-type { height: max-content; padding: 5px 10px; border: 1px solid rgba(102, 126, 234, .35); border-radius: 20px; }
.experience-points { color: var(--text-secondary); margin: 18px 0 22px 18px; }
.experience-points li { margin: 8px 0; }

/* ===========================
   SKILLS SECTION
   =========================== */

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

.skill-category {
    background: rgba(102, 126, 234, 0.05);
    padding: 35px;
    border-radius: 12px;
    border: 1px solid rgba(102, 126, 234, 0.2);
    transition: all 0.3s ease;
}

.skill-category:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.15);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.skill-icon { font-size: 1.5rem; margin-bottom: 14px; }

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(102, 126, 234, .13);
}

.skill-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===========================
   PROJECTS SECTION
   =========================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.project-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), rgba(240, 147, 251, 0.08));
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.2), transparent);
    transition: left 0.5s ease;
}

.project-card:hover::before {
    left: 100%;
}

.project-card:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(240, 147, 251, 0.15));
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-15px);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.2);
}

.project-header {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.7;
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}

.tag {
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary-color);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s ease;
    position: relative;
}

.project-status { cursor: default; }

.project-link::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.project-link:hover::after {
    width: 100%;
}

/* ===========================
   CONTACT SECTION
   =========================== */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h4 {
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contact-item a,
.contact-item p {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-social {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: 1px solid rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: rgba(102, 126, 234, 0.05);
    padding: 35px;
    border-radius: 12px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.contact-form input,
.contact-form textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
    padding: 15px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    resize: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.2);
}

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

.contact-form button {
    margin-top: 10px;
}

.form-note { color: var(--text-secondary); font-size: .82rem; line-height: 1.5; }

/* ===========================
   FOOTER
   =========================== */

.footer {
    background: rgba(15, 15, 30, 0.8);
    padding: 40px 0;
    border-top: 1px solid rgba(102, 126, 234, 0.1);
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-social {
    display: flex;
    gap: 20px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.footer-social a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* ===========================
   BACK TO TOP BUTTON
   =========================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .image-wrapper {
        width: 250px;
        height: 300px;
    }

    .education-timeline::before {
        left: 20px;
    }

    .timeline-marker {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 20px;
        padding-left: 60px;
    }

    .timeline-item:nth-child(even) .timeline-content {
        order: 0;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .internship-card { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(15, 15, 30, 0.95);
        flex-direction: column;
        padding: 30px 0;
        gap: 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 0;
        padding: 15px 30px;
        border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-8px, 8px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-8px, -8px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    section {
        padding: 70px 0;
    }

    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .social-links {
        gap: 10px;
    }

    .social-icon {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }

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

    .experience-heading { flex-direction: column; gap: 8px; }

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

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 20px;
        right: 20px;
        font-size: 1rem;
    }
}