/* === RESET & BASE STYLES === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #0f0f0f;
    overflow-x: hidden;
}

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

/* === NAVIGATION === */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #00d4ff;
    text-decoration: none;
}

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

.nav-links li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.nav-links li a:hover {
    color: #00d4ff;
}

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

.mobile-menu span {
    width: 25px;
    height: 3px;
    background: #fff;
    margin: 3px 0;
    transition: 0.3s;
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(45deg, #0f0f0f, #1a1a1a);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%2300d4ff" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    z-index: 1;
}

.hero-content {
    text-align: center;
    color: #fff;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #00d4ff);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.3s forwards;
}

.hero-description {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.6s forwards;
}

/* === BUTTONS === */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.9s forwards;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    color: #fff;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #00d4ff;
}

.btn-secondary:hover {
    background: #00d4ff;
    color: #0f0f0f;
    transform: translateY(-3px);
}

/* === SECTIONS === */
section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #fff;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
}

/* === ABOUT SECTION === */
.about {
    background: #1a1a1a;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1);
}

.about-text {
    color: #ccc;
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-text h3 {
    color: #00d4ff;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.skill-item {
    background: #2a2a2a;
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    color: #fff;
}

.skill-item:hover {
    transform: translateY(-5px);
    background: linear-gradient(45deg, #2a2a2a, #3a3a3a);
}

.skill-item i {
    font-size: 2rem;
    color: #00d4ff;
    margin-bottom: 0.5rem;
}

/* === PROJECTS SECTION === */
.projects {
    background: #0f0f0f;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: #1a1a1a;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1);
}

.project-image {
    height: 200px;
    background: linear-gradient(45deg, #2a2a2a, #3a3a3a);
    position: relative;
    overflow: hidden;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 212, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

.project-links a {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px;
    border-radius: 50%;
    transition: background 0.3s ease;
    text-decoration: none;
}

.project-links a:hover {
    background: rgba(255, 255, 255, 0.3);
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    color: #fff;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.project-info p {
    color: #ccc;
    margin-bottom: 1rem;
}

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

.tech-tag {
    background: #00d4ff;
    color: #0f0f0f;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* === CERTIFICATE SECTION === */
.certificate {
    background: #0f0f0f;
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.certificate-card {
    background: #1a1a1a;
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1);
}

.certificate-image {
    height: 200px;
    background: linear-gradient(45deg, #2a2a2a, #3a3a3a);
    position: relative;
    overflow: hidden;
}

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

.certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 212, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.certificate-card:hover .certificate-overlay {
    opacity: 1;
}

.certificate-links {
    display: flex;
    gap: 1rem;
}

.certificate-links a {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px;
    border-radius: 50%;
    transition: background 0.3s ease;
    text-decoration: none;
}

.certificate-links a:hover {
    background: rgba(255, 255, 255, 0.3);
}

.certificate-info {
    padding: 1.5rem;
}

.certificate-info h3 {
    color: #fff;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.certificate-info p {
    color: #ccc;
    margin-bottom: 1rem;
}

.certificate-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: #00d4ff;
    color: #0f0f0f;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* === CONTACT SECTION === */
.contact {
    background: #1a1a1a;
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    background: #2a2a2a;
    padding: 2rem;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item i {
    font-size: 2rem;
    color: #00d4ff;
    margin-bottom: 1rem;
}

.contact-item h4 {
    color: #fff;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: #ccc;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-links a {
    color: #00d4ff;
    font-size: 1.5rem;
    padding: 10px;
    border-radius: 50%;
    background: #2a2a2a;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    background: #00d4ff;
    color: #0f0f0f;
    transform: translateY(-3px);
}

/* === FOOTER === */
footer {
    background: #0f0f0f;
    text-align: center;
    padding: 2rem;
    border-top: 1px solid #2a2a2a;
}

footer p {
    color: #ccc;
}

/* === LOADING SCREEN === */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0f0f0f;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid #2a2a2a;
    border-top: 3px solid #00d4ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}