/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    --color-bg: #0a0e27;
    --color-bg-secondary: #131732;
    --color-accent: #00d4ff;
    --color-accent-secondary: #00a8cc;
    --color-text: #ffffff;
    --color-text-secondary: #b8c5d6;
    --color-glass-bg: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    --font-primary: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ========================================
   Canvas Background
   ======================================== */
#bubbleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========================================
   Container & Utility Classes
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--color-text);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary));
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* ========================================
   Glass Card Effect
   ======================================== */
.glass-card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-glass-border);
    padding: 1rem 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    text-shadow: 0 0 20px var(--color-accent);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    transition: var(--transition);
    border-radius: 3px;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-text), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    color: var(--color-bg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-3px);
}

.social-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.social-links a {
    width: 50px;
    height: 50px;
    background: var(--color-glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    font-size: 1.5rem;
    transition: var(--transition);
    text-decoration: none;
}

.social-links a:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-5px) rotate(360deg);
    box-shadow: var(--shadow-glow);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-accent);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    width: 6px;
    height: 10px;
    background: var(--color-accent);
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 3px;
    animation: scroll 2s infinite;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.highlight-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 168, 204, 0.1));
    padding: 1.5rem;
    border-radius: 15px;
    border-left: 4px solid var(--color-accent);
}

.highlight-box i {
    font-size: 2rem;
    color: var(--color-accent);
}

.highlight-box p {
    margin: 0;
    font-size: 1.1rem;
}

/* ========================================
   Education Timeline
   ======================================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-secondary));
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
    text-align: right;
}

.timeline-item:nth-child(odd) .timeline-content {
    padding-right: 3rem;
}

.timeline-item:nth-child(even) .timeline-content {
    padding-left: 3rem;
}

.timeline-date {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    margin-top: 3rem;
}

.timeline-content h3 {
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.timeline-subtitle {
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-description {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.timeline-modules {
    list-style: none;
}

.timeline-modules li {
    color: var(--color-text-secondary);
    padding: 0.3rem 0;
    position: relative;
    padding-left: 1.5rem;
}

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

/* ========================================
   Experience Section
   ======================================== */
.experience {
    background: var(--color-bg-secondary);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.experience-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--color-bg);
}

.experience-card h3 {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.experience-company {
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.experience-date {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experience-list {
    text-align: left;
    list-style: none;
}

.experience-list li {
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.experience-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ========================================
   Projects Section
   ======================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    color: var(--color-bg);
}

.project-card h3 {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.project-subtitle {
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

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

.tag {
    background: rgba(0, 212, 255, 0.2);
    color: var(--color-accent);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--color-accent);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.6rem 1.2rem;
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    text-decoration: none;
    border-radius: 25px;
    border: 1px solid var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.project-link:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.project-link i {
    font-size: 1.1rem;
}

/* ========================================
   Skills Section
   ======================================== */
.skills {
    background: var(--color-bg-secondary);
}

.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skills-category h3 {
    color: var(--color-accent);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.skill-item {
    margin-bottom: 1.5rem;
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.skill-header i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.skill-header h4 {
    margin: 0;
    color: var(--color-text);
    font-weight: 600;
}

.skill-name {
    color: var(--color-text);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-name i {
    color: var(--color-accent);
}

.skill-percent {
    color: var(--color-accent);
    font-weight: 600;
}

.skill-bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary));
    border-radius: 10px;
    animation: fillBar 1.5s ease-out;
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
}

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

.language-item i {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.language-item h4 {
    color: var(--color-text);
    margin-bottom: 0.3rem;
    font-size: 1.1rem;
}

.language-item p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Volunteering Section
   ======================================== */
.volunteering-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.volunteering-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--color-bg);
}

.volunteering-card h3 {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.volunteering-role {
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.volunteering-date {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.volunteering-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-info h3 {
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.contact-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-form h3 {
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-glass-border);
    border-radius: 10px;
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.form-group textarea {
    resize: vertical;
}

.form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 10px;
    display: none;
    text-align: center;
    font-weight: 600;
}

.form-status.success {
    display: block;
    background: rgba(0, 255, 128, 0.1);
    border: 1px solid rgba(0, 255, 128, 0.3);
    color: #00ff80;
}

.form-status.error {
    display: block;
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid rgba(255, 0, 0, 0.3);
    color: #ff4444;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--color-glass-border);
}

.footer p {
    color: var(--color-text-secondary);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

@keyframes fillBar {
    from {
        width: 0;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu li {
        padding: 1rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

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

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

    .section-title {
        font-size: 2rem;
    }

    section {
        padding: 60px 0;
    }

    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .timeline-item {
        flex-direction: column !important;
        text-align: center !important;
        padding-left: 0;
    }

    .timeline-item .timeline-content {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    .timeline-date {
        left: 50%;
        transform: translateX(-50%);
        top: -1.5rem;
        position: relative;
    }

    .projects-grid,
    .experience-grid,
    .volunteering-grid,
    .skills-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

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

    .btn {
        width: 100%;
    }
}