/* ==================== ROOT VARIABLES ==================== */
:root {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --accent-cyan: #06B6D4;
    --accent-purple: #3B82F6;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --border-glow: rgba(6, 182, 212, 0.25);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==================== NAVIGATION ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: #0F172A;
    border-bottom: 1px solid #334155;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.logo-text {
    color: #06B6D4;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

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

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

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--accent-cyan);
    transition: var(--transition);
}

/* ==================== HERO SECTION ==================== */
.hero {
    background: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    z-index: 1;
    text-align: center;
}

.hero-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    max-width: 500px;
}

.hero-profile-img {
    width: 100%;
    max-width: 380px;
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(6,182,212,.4);
    animation: floatProfile 6s ease-in-out infinite, glow 4s ease-in-out infinite alternate;
    object-fit: cover;
    aspect-ratio: 1 / 1;
    border: 4px solid #06B6D4;
    position: relative;
    z-index: 2;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #F8FAFC;
}

.hero-title .accent {
    color: #06B6D4;
    text-shadow: 0 0 8px rgba(6,182,212,.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #3B82F6;
    margin-bottom: 1.5rem;
    min-height: 30px;
}

.hero-description {
    font-size: 1.1rem;
    color: #94A3B8;
    margin-bottom: 2rem;
    max-width: 700px;
    line-height: 1.6;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    justify-content: center;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    border: 2px solid;
}

.btn-primary {
    background: #3B82F6;
    color: #fff;
    border: none;
    padding: 14px 32px;
}

.btn-primary:hover {
    background: #2563EB;
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: #06B6D4;
    border: 2px solid #06B6D4;
    padding: 14px 32px;
}

.btn-secondary:hover {
    background: #06B6D4;
    color: #fff;
    transform: translateY(-3px);
}

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

.social-link {
    width: 50px;
    height: 50px;
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    transition: var(--transition);
    text-decoration: none;
    font-size: 1.3rem;
}

.social-link:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
    transform: scale(1.1);
}

.hero-canvas {
    position: relative;
    height: 500px;
}

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

@keyframes floatProfile {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(3deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes glow-pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(0, 212, 255, 0.6);
    }
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(6, 182, 212, 0.2); }
    to { box-shadow: 0 0 40px rgba(59, 130, 246, 0.5); }
}

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== GLASSMORPHISM ==================== */
.glass-effect {
    background: #1E293B;
    border: 1px solid #334155;
    border-radius: 18px;
    transition: var(--transition);
}

.glass-effect:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(6,182,212,.15);
}

/* ==================== SECTIONS ==================== */
section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== ACHIEVEMENTS ==================== */
.achievements {
    margin-top: 4rem;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.cert-card {
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(6, 182, 212, 0.2);
}

.cert-icon-container {
    width: 100%;
    height: 120px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(59, 130, 246, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.cert-icon-container i {
    font-size: 3.5rem;
    color: var(--accent-cyan);
    text-shadow: 0 0 15px rgba(6, 182, 212, 0.5);
    transition: transform 0.3s ease;
}

.cert-card:hover .cert-icon-container i {
    transform: scale(1.2);
}

.cert-details {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.cert-category {
    font-size: 0.8rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.cert-details h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 1rem;
}

.cert-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    margin-top: auto;
}

.cert-btn:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

/* ==================== ABOUT SECTION ==================== */
.about {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    padding: 2rem;
    animation: slide-up 0.6s ease;
}

.about-card h3 {
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.highlight {
    color: var(--accent-cyan);
    font-weight: 600;
}

/* ==================== SKILLS SECTION ==================== */
.skills {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.skill-category {
    padding: 2rem;
    animation: slide-up 0.6s ease;
}

.skill-category h3 {
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: 20px;
    color: var(--accent-cyan);
    font-size: 0.9rem;
    transition: var(--transition);
    cursor: default;
}

.skill-tag.glow {
    animation: glow-pulse 2s ease-in-out infinite;
}

.skill-tag:hover {
    background: rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
    transform: translateY(-3px);
}

/* ==================== PROJECTS SECTION ==================== */
.projects {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

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

.project-card {
    padding: 2rem;
    animation: slide-up 0.6s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    border-left: 3px solid var(--accent-cyan);
}

.project-card:hover {
    transform: translateY(-8px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.project-header h3 {
    color: var(--accent-cyan);
    font-size: 1.3rem;
}

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

.project-icons i {
    color: var(--accent-cyan);
    cursor: pointer;
    transition: var(--transition);
}

.project-icons i:hover {
    transform: scale(1.2);
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-badge {
    padding: 0.3rem 0.8rem;
    background: rgba(168, 85, 247, 0.2);
    border: 1px solid var(--accent-purple);
    border-radius: 15px;
    color: #3B82F6;
    font-size: 0.8rem;
}

.project-features {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-features p {
    font-size: 0.9rem;
    margin: 0;
    color: var(--text-secondary);
}

.project-features p::before {
    content: '✓ ';
    color: var(--accent-cyan);
    font-weight: bold;
}

/* ==================== EDUCATION SECTION ==================== */
.education {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    padding-left: 4rem;
    animation: slide-up 0.6s ease;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 2rem;
    width: 12px;
    height: 12px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 3rem;
    width: 2px;
    height: calc(100% + 2rem);
    background: linear-gradient(180deg, var(--accent-cyan), transparent);
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-item h3 {
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

.timeline-subtitle {
    color: #3B82F6;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-item.has-image .flex-content {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.timeline-image-container {
    flex: 0 0 160px;
    height: 120px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.timeline-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.timeline-item:hover .timeline-image {
    transform: scale(1.1);
}

.timeline-address {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0.5rem 0 1rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    line-height: 1.4;
}

.timeline-address i {
    color: var(--accent-cyan);
    margin-top: 0.2rem;
}

/* ==================== RESUME SECTION ==================== */
.resume-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.resume-actions {
    text-align: center;
    width: 100%;
}

.resume-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.resume-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.resume-preview {
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==================== CONTACT SECTION ==================== */
.contact {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info, .contact-form {
    padding: 2rem;
}

.contact-info h3, .contact-form h3 {
    color: var(--accent-cyan);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

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

.contact-item i {
    color: var(--accent-cyan);
    margin-top: 5px;
    font-size: 1.2rem;
}

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

.contact-item a:hover {
    color: #3B82F6;
    text-decoration: underline;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    background: rgba(10, 15, 28, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: #0F172A;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
}

.footer {
    background: #0B1220;
    padding: 2rem;
    text-align: center;
    color: #94A3B8;
}

.footer-tagline {
    color: var(--accent-cyan);
    font-style: italic;
    margin-top: 0.5rem;
}

/* ==================== RESPONSIVE DESIGN ==================== */
/* Desktop - Large screens */
@media (min-width: 1200px) {
    .contact-content {
        gap: 4rem;
    }

    .contact-info, .contact-form {
        padding: 2.5rem;
    }
}

@media (max-width: 768px) {
    /* NAVIGATION */
    .nav-menu {
        display: none;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        height: 100vh;
        background: rgba(10, 15, 28, 0.98);
        backdrop-filter: blur(20px);
        padding: 3rem 2rem;
        gap: 2.5rem;
        align-items: center;
        border-top: 1px solid rgba(6, 182, 212, 0.2);
    }
    
    .nav-menu.active .nav-link {
        font-size: 1.5rem;
        font-weight: 600;
        width: 100%;
        text-align: center;
        padding: 10px;
    }

    .hamburger {
        display: flex;
    }

    /* HERO SECTION */
    .hero {
        padding: 120px 1rem 3rem;
    }

    .hero-profile-img {
        max-width: 220px;
        border-width: 3px;
        box-shadow: 0 10px 30px rgba(6, 182, 212, 0.5), inset 0 0 15px rgba(59, 130, 246, 0.5);
    }

    .hero-title {
        font-size: 2.4rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1.3rem;
        margin-top: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        max-width: 350px;
        margin: 0 auto;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 14px 20px; /* larger tap target */
        font-size: 1rem;
        border-radius: 8px;
    }

    h2 {
        font-size: 2rem;
    }

    /* GRIDS */
    .projects-grid,
    .skills-grid,
    .about-content,
    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-info, .contact-form {
        padding: 1.5rem;
        border-radius: 12px;
    }

    .contact-item {
        margin-bottom: 1.2rem;
        align-items: center;
    }

    .social-icons {
        justify-content: center;
        gap: 1.5rem;
        margin-top: 2rem;
    }
    
    .social-link {
        font-size: 1.8rem;
    }

    /* TIMELINE FIXES */
    .timeline::before {
        left: 20px;
    }
    
    .timeline-marker {
        left: 14px;
        width: 14px;
        height: 14px;
    }

    .timeline-item {
        padding-left: 3.5rem;
        padding-right: 1rem;
        padding-top: 1.5rem;
        padding-bottom: 1.5rem;
    }
    
    .timeline-item.has-image .flex-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .timeline-image-container {
        width: 100%;
        flex: none;
        height: 200px;
    }

    /* PREMIUM CARDS */
    .glass-effect {
    background: #1E293B;
    border: 1px solid #334155;
    border-radius: 18px;
    transition: var(--transition);
}
    
    .cert-icon-container {
        height: 100px;
    }
    
    .cert-icon-container i {
        font-size: 3rem;
    }
    
    /* RESUME MOBILE */
    .resume-preview {
        display: none !important; /* Hide iframe on mobile */
    }
    
    .resume-actions {
        padding: 2rem 1rem;
        background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(59, 130, 246, 0.1));
        border-radius: 16px;
        border: 1px solid rgba(6, 182, 212, 0.3);
        margin: 0 1rem;
    }
    
    .resume-text {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.2rem;
    }

    .hero {
        padding: 100px 1rem 2rem;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    h2 {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }

    .about-card,
    .skill-category,
    .project-card {
        padding: 1.5rem;
    }
    
    .skill-tag {
        padding: 10px 16px; /* larger tap targets */
        font-size: 0.95rem;
    }

    .contact-info, .contact-form {
        padding: 1.2rem !important;
    }

    .form-group input,
    .form-group textarea {
        padding: 14px;
        font-size: 1rem; /* prevent iOS zoom */
    }

    .btn {
        padding: 14px 20px;
        font-size: 1rem;
    }

    .nav-container {
        padding: 1rem;
    }
}

.skill-tag i {
    color: #06B6D4;
}