:root {
    /* Color Palette - Deep Blue Base */
    --primary-dark: #0d1b3e;
    --primary-blue: #1a2f5a;
    --accent-blue: #2d4a7c;
    --light-blue: #4a6fa5;
    --bright-blue: #5b8fd9;
    --cyan-accent: #3dd5f3;

    /* Neutral Colors */
    --white: #ffffff;
    --off-white: #f8f9fa;
    --light-gray: #e1e8ed;
    --medium-gray: #8b95a5;
    --dark-gray: #2c3e50;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1a2f5a 0%, #2d4a7c 100%);
    --gradient-accent: linear-gradient(135deg, #5b8fd9 0%, #3dd5f3 100%);
    --gradient-dark: linear-gradient(180deg, #0d1b3e 0%, #1a2f5a 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(13, 27, 62, 0.1);
    --shadow-md: 0 4px 16px rgba(13, 27, 62, 0.15);
    --shadow-lg: 0 8px 32px rgba(13, 27, 62, 0.2);
    --shadow-xl: 0 16px 48px rgba(13, 27, 62, 0.25);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-gray);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--off-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 27, 62, 0.4);
    background: rgba(255, 255, 255, 1);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(13, 27, 62, 0.95);
    background: white;
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    img{
        width: 120px;
        height: auto;
        
    }
}

/* .logo-placeholder {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    padding: 0.5rem 1rem;
    border: 2px solid var(--cyan-accent);
    background: linear-gradient(135deg, rgba(91, 143, 217, 0.1), rgba(61, 213, 243, 0.1));
    letter-spacing: 0.2em;
    transition: all var(--transition-normal);
} */

.logo-placeholder:hover {
    background: linear-gradient(135deg, rgba(91, 143, 217, 0.2), rgba(61, 213, 243, 0.2));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(61, 213, 243, 0.3);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--white);
    color: var(--primary-dark);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    position: relative;
    transition: all var(--transition-normal);
    letter-spacing: 0.05em;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::before {
    width: 80%;
}

.nav-link.active {
    color: var(--cyan-accent);
    color: var(--primary-blue)
}

.nav-link.active::before {
    width: 80%;
}

/* Hero Section */

.hero-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
    background: var(--primary-dark);
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.slide-content {
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: var(--spacing-md);
    animation: slideUp 1s ease-out;
}

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

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

.slide-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--cyan-accent);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.2em;
}

.slide-title {
    max-width: 770px;
    margin: 0 auto;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    background: linear-gradient(135deg, var(--white) 0%, var(--cyan-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slide-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--light-gray);
    margin-bottom: var(--spacing-lg);
}

.tech-line {
    width: 200px;
    height: 2px;
    background: var(--gradient-accent);
    margin: 0 auto;
    position: relative;
}

.tech-line::after {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid var(--cyan-accent);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}

/* Slider Controls */
.slider-controls {
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 10;
}

.slider-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--cyan-accent);
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: var(--spacing-sm);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.dot.active {
    background: var(--cyan-accent);
    border-color: var(--white);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--white);
}

/* Tech Background Elements */
.tech-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.tech-arrow {
    position: absolute;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyan-accent), transparent);
    opacity: 0.3;
}

.arrow-1 {
    top: 20%;
    left: 10%;
    animation: slideRight 3s ease-in-out infinite;
}

.arrow-2 {
    bottom: 30%;
    right: 15%;
    animation: slideLeft 4s ease-in-out infinite;
}

@keyframes slideRight {

    0%,
    100% {
        transform: translateX(0);
        opacity: 0.3;
    }

    50% {
        transform: translateX(50px);
        opacity: 0.6;
    }
}

@keyframes slideLeft {

    0%,
    100% {
        transform: translateX(0);
        opacity: 0.3;
    }

    50% {
        transform: translateX(-50px);
        opacity: 0.6;
    }
}

.tech-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(61, 213, 243, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61, 213, 243, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    right: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--white);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    z-index: 10;
    opacity: 0.7;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--cyan-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 0.3;
        transform: translateY(0);
    }

    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* Portfolio Section */
.portfolio-section {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--off-white) 0%, #e8eef5 100%);
    overflow: hidden;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--medium-gray);
    font-weight: 300;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-accent);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 10px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Flip Cards */
.flip-card {
    perspective: 1000px;
    aspect-ratio: 1;
    overflow: hidden;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

.flip-card-front {
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
}

.card-overlay {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(180deg, transparent, rgba(13, 27, 62, 0.95));
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.flip-card:hover .card-overlay {
    background: linear-gradient(180deg, transparent, rgba(13, 27, 62, 1));
}

.card-title {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
}

.card-btn {
    align-self: flex-start;
    padding: 0.5rem 2.5rem;
    background: transparent;
    border: 1px solid var(--cyan-accent);
    color: var(--cyan-accent);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    display: inline-block;
}

.card-btn:hover {
    background: var(--cyan-accent);
    color: var(--primary-dark);
    /* transform: translateX(5px); */
}

.flip-card-back {
    background: var(--gradient-primary);
    transform: rotateY(180deg);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-back-content {
    color: var(--white);
    text-align: center;
}

.card-back-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--cyan-accent);
}

.card-back-content p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.tech-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.tech-tags span {
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    backdrop-filter: blur(10px);
}

/* Section Background Lines */
.section-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.bg-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--light-blue), transparent);
    opacity: 0.2;
}

.line-1 {
    top: 20%;
    left: -10%;
    width: 60%;
    animation: lineFloat1 8s ease-in-out infinite;
}

.line-2 {
    top: 50%;
    right: -10%;
    width: 50%;
    animation: lineFloat2 10s ease-in-out infinite;
}

.line-3 {
    bottom: 30%;
    left: 20%;
    width: 40%;
    animation: lineFloat1 12s ease-in-out infinite;
}

@keyframes lineFloat1 {

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

    50% {
        transform: translateY(-30px);
    }
}

@keyframes lineFloat2 {

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

    50% {
        transform: translateY(30px);
    }
}

/* Contact Section */
.contact-section {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: var(--gradient-dark);
    overflow: hidden;
}

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

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.contact-text {
    font-size: 1.5rem;
    color: var(--cyan-accent);
    font-weight: 300;
}

.contact-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.deco-line {
    width: 100px;
    height: 2px;
    background: var(--gradient-accent);
}

.deco-dot {
    width: 8px;
    height: 8px;
    background: var(--cyan-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.5);
        opacity: 0.5;
    }
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

.form-group label {
    color: var(--light-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-group input,
.form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--white);
    padding: 1rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    border-radius: 4px;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--cyan-accent);
    background: rgba(255, 255, 255, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.input-border {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-normal);
}

.form-group input:focus~.input-border,
.form-group textarea:focus~.input-border {
    width: 100%;
}

.submit-btn {
    align-self: flex-start;
    padding: 1.25rem 3rem;
    background: var(--gradient-accent);
    border: none;
    color: var(--white);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.submit-btn svg {
    transition: transform var(--transition-normal);
}

.submit-btn:hover svg {
    transform: translateX(5px);
}
.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}   

/* Success Message */
.success-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-slow);
}

.success-message.show {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.success-content {
    text-align: center;
}

.success-content svg {
    color: var(--bright-blue);
    margin-bottom: var(--spacing-md);
}

.success-content h3 {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.success-content p {
    color: var(--medium-gray);
    font-size: 1.1rem;
}

#error-message{
    color: white;
    ul{
        list-style-type: none;
    }
}

/* Contact Background */
.contact-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.1;
}

.bg-circuit {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background-image:
        radial-gradient(circle at 20% 30%, var(--cyan-accent) 2px, transparent 2px),
        radial-gradient(circle at 80% 70%, var(--cyan-accent) 2px, transparent 2px),
        radial-gradient(circle at 50% 50%, var(--cyan-accent) 2px, transparent 2px);
    background-size: 100px 100px;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Footer */
.footer {
    background: var(--primary-dark);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--cyan-accent);
}

.footer-info p {
    color: var(--light-gray);
    margin-bottom: var(--spacing-md);
}

.footer-tech {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--medium-gray);
}

.footer-tech span:not(:last-child)::after {
    content: '•';
    margin-left: var(--spacing-sm);
    color: var(--light-blue);
}

.footer-copy {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copy p {
    color: var(--medium-gray);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .slide-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .slider-controls {
        bottom: 30px;
    }

    .scroll-indicator {
        display: none;
    }

    .submit-btn {
        width: 100%;
        justify-content: center;
    }

    .header-container {
        padding: 0.75rem var(--spacing-sm);
    }

    .logo-placeholder {
        font-size: 1.2rem;
        padding: 0.4rem 0.8rem;
    }

    .nav-menu {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: 0.9rem;
        padding: 0.4rem 0.6rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .slide-title {
        font-size: 1.75rem;
    }

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

    .footer-tech {
        flex-wrap: wrap;
    }
}