/* ==========================================================================
   CSS CUSTOM VARIABLES & GLOBAL STYLES
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-primary: #0b0f19;
    --bg-secondary: #121829;
    --card-bg: rgba(20, 27, 45, 0.6);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(99, 102, 241, 0.3);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --primary: #6366f1;
    /* Indigo */
    --primary-glow: rgba(99, 102, 241, 0.15);
    --accent: #38bdf8;
    /* Cyan */
    --accent-glow: rgba(56, 189, 248, 0.15);

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #38bdf8 100%);
    --gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(56, 189, 248, 0.3) 100%);

    /* Typography */
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    max-width: 100%;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    max-width: 100%;
    position: relative;
    min-height: 100vh;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Global Layout Containers */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0 4rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

/* Premium Background Glow Effect */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.15;
    animation: pulse 12s infinite alternate;
    max-width: 100vw;
}

.bg-glow-1 {
    background: var(--primary);
    top: -10%;
    right: -10%;
}

.bg-glow-2 {
    background: var(--accent);
    top: 50%;
    left: -10%;
    animation-delay: 4s;
}

@keyframes pulse {
    0% {
        transform: scale(1) translate(0, 0);
    }

    100% {
        transform: scale(1.15) translate(50px, 50px);
    }
}

/* Visual Cards (Glassmorphism) */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
    transition: var(--transition-slow);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    box-shadow: 0 10px 30px -10px var(--primary-glow);
}

/* Gradient Text Effect */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px -3px var(--primary-glow);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px -3px var(--primary-glow);
    transform: translateY(-2px);
    opacity: 0.95;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
}

/* ==========================================================================
   NAVIGATION HEADER
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: var(--transition-normal);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.logo span {
    color: var(--accent);
}

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

.nav-link {
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    width: 24px;
    height: 18px;
    z-index: 1010;
}

.nav-toggle span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: .25s ease-in-out;
}

.nav-toggle span:nth-child(1) {
    top: 0px;
}

.nav-toggle span:nth-child(2) {
    top: 8px;
}

.nav-toggle span:nth-child(3) {
    top: 16px;
}

.nav-toggle.active span:nth-child(1) {
    top: 8px;
    transform: rotate(135deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav-toggle.active span:nth-child(3) {
    top: 8px;
    transform: rotate(-135deg);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    display: inline-block;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.typewriter-name-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    border-right: 3px solid var(--accent);
    padding-right: 8px;
    animation: blink 0.75s step-end infinite;
    display: inline-block;
}

.hero-typewriter {
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-family: var(--font-heading);
}

.typewriter-text {
    color: var(--primary);
    border-right: 3px solid var(--accent);
    padding-right: 5px;
    animation: blink 0.75s step-end infinite;
}

.hero-description {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
}

/* Interactive Visual Card (Right side) */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: fadeInUp 1s ease-out;
}

.visual-card-wrapper {
    position: relative;
    width: 100%;
    max-width: 380px;
}

.visual-card-wrapper::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: var(--gradient-glow);
    border-radius: 20px;
    z-index: -1;
    filter: blur(20px);
    opacity: 0.5;
}

.visual-card {
    background: #0d1222;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    font-family: 'Courier New', Courier, monospace;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    overflow-x: auto;
    max-width: 100%;
}

.card-dots {
    display: flex;
    gap: 6px;
    margin-bottom: 1.5rem;
}

.card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #ff5f56;
}

.card-dots span:nth-child(2) {
    background-color: #ffbd2e;
}

.card-dots span:nth-child(3) {
    background-color: #27c93f;
}

.card-code {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #e2e8f0;
    text-align: left;
}

.code-keyword {
    color: #f43f5e;
}

.code-variable {
    color: #38bdf8;
}

.code-string {
    color: #10b981;
}

.code-boolean {
    color: #f59e0b;
}

/* Animations */
@keyframes blink {

    from,
    to {
        border-color: transparent
    }

    50% {
        border-color: var(--accent);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   ABOUT ME SECTION
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
}

.about-info h3,
.about-timeline h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.about-info p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.about-info p:last-child {
    margin-bottom: 0;
}

.about-left-col {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    box-shadow: 0 10px 25px -10px var(--primary-glow);
    background: rgba(255, 255, 255, 0.04);
}

.cert-image {
    height: 130px;
    position: relative;
    background: linear-gradient(135deg, rgba(20, 27, 45, 0.5) 0%, rgba(11, 15, 25, 0.9) 100%);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cert-placeholder {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 2.5rem;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.cert-card:hover .cert-placeholder {
    color: var(--accent);
    transform: scale(1.1);
    transition: var(--transition-normal);
}

.cert-info {
    padding: 1.2rem;
}

.cert-info h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.cert-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Lightbox Modal for Certificates */
.cert-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(11, 15, 25, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s ease;
}

.cert-modal.open {
    display: flex;
    opacity: 1;
}

.cert-modal-content {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    transform: scale(0.9);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cert-modal.open .cert-modal-content {
    transform: scale(1);
}

.cert-modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    color: var(--text-primary);
    font-size: 3rem;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition-fast);
    line-height: 1;
    z-index: 2001;
}

.cert-modal-close:hover {
    color: var(--accent);
    transform: scale(1.1);
}

/* Timeline */
.timeline {
    position: relative;
    border-left: 2px solid var(--card-border);
    padding-left: 1.5rem;
    margin-left: 0.5rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: calc(-1.5rem - 6px);
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 10px var(--primary);
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.3rem;
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

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

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    transition: transform var(--transition-normal);
}

.skill-card:hover .skill-icon {
    transform: scale(1.15) rotate(5deg);
}

.skill-card h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
}

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

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

.project-card {
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.project-image {
    height: 180px;
    background: #0f172a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition-normal);
    background: linear-gradient(135deg, rgba(20, 27, 45, 0.4) 0%, rgba(11, 15, 25, 0.8) 100%);
}

.project-card:hover .project-image {
    color: var(--accent);
    font-size: 4.5rem;
}

.project-info {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    margin-bottom: 0.8rem;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

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

.tag {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
}

.project-link {
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 500;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-wrapper {
    display: flex;
    justify-content: center;
    max-width: 850px;
    margin: 0 auto;
}

.contact-info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    width: 100%;
}

.contact-card {
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    cursor: pointer;
}

.contact-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    transition: transform var(--transition-normal);
}

.contact-card:hover .contact-icon {
    transform: scale(1.15) translateY(-5px);
    color: var(--accent);
}

.contact-card h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.contact-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
}

.contact-link-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent);
    word-break: break-all;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    border-top: 1px solid var(--card-border);
    padding: 2.5rem 0;
    margin-top: 6rem;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-socials {
    display: flex;
    gap: 1.5rem;
}

.footer-socials a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.footer-socials a:hover {
    color: var(--text-primary);
}

/* ==========================================================================
   MEDIA QUERIES (Responsive Design)
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }

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

    /* Mobile Menu */
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: rgba(11, 15, 25, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        padding-top: 4rem;
        gap: 1.5rem;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-15px);
        transition: opacity var(--transition-normal), transform var(--transition-normal);
        border-top: 1px solid var(--card-border);
    }

    .nav-menu.active {
        opacity: 1;
        pointer-events: all;
        transform: translateY(0);
    }

    .nav-link {
        font-size: 1.5rem;
        margin: 0;
        font-weight: 600;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity var(--transition-normal), transform var(--transition-normal);
    }

    .nav-menu.active .nav-link {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-menu.active .nav-link:nth-child(1) {
        transition-delay: 0.1s;
    }

    .nav-menu.active .nav-link:nth-child(2) {
        transition-delay: 0.15s;
    }

    .nav-menu.active .nav-link:nth-child(3) {
        transition-delay: 0.2s;
    }

    .nav-menu.active .nav-link:nth-child(4) {
        transition-delay: 0.25s;
    }

    .nav-menu.active .nav-link:nth-child(5) {
        transition-delay: 0.3s;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .container {
        padding: 0 1.25rem;
    }

    .section {
        padding: 4.5rem 0 2.5rem;
    }

    .card {
        padding: 1.5rem 1.25rem;
    }

    .bg-glow {
        width: 300px;
        height: 300px;
        filter: blur(80px);
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .hero-typewriter {
        font-size: 1.6rem;
    }

    .visual-card-wrapper::before {
        top: -4px;
        left: -4px;
        right: -4px;
        bottom: -4px;
        filter: blur(12px);
    }

    .visual-card {
        padding: 1.25rem 1rem;
    }

    .card-code {
        font-size: 0.85rem;
    }

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

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }

    .contact-info-cards {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .card {
        padding: 1.25rem 1rem;
    }

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

    .section-header {
        margin-bottom: 2.5rem;
    }

    .visual-card {
        padding: 1rem 0.85rem;
    }

    .card-code {
        font-size: 0.8rem;
    }

    .hero-title {
        font-size: 2.1rem;
    }

    .hero-typewriter {
        font-size: 1.35rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
    }

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

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

    .timeline {
        padding-left: 1.2rem;
        margin-left: 0.2rem;
    }

    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}