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

:root {
    --white: #ffffff;
    --black: #000000;
    --gray-light: #f8f9fa;
    --gray: #e9ecef;
    --gray-medium: #adb5bd;
    --gray-dark: #495057;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
    --border-radius: 6px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-dark);
}

a {
    color: var(--black);
    text-decoration: none;
    transition: var(--transition);
}

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

.section-title::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 2px;
    background-color: var(--black);
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(5px);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    position: relative;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -4px;
    left: 0;
    background-color: var(--black);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
}

.menu-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--black);
    margin: 4px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    position: relative;
}

.hero-title {
    margin-bottom: var(--spacing-sm);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* New quote style */
.hero-quote {
    font-style: italic;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    opacity: 0.8;
}

.btn {
    display: inline-block;
    padding: 10px 28px;
    border: 1px solid var(--black);
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    font-size: 0.95rem;
    background: transparent;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--black);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.scroll-indicator {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    cursor: pointer;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-8px);
    }
    60% {
        transform: translateX(-50%) translateY(-4px);
    }
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--gray-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.extra-curricular {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray);
}

.extra-curricular h3 {
    margin-bottom: var(--spacing-md);
}

.activities-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.activity-item {
    padding: var(--spacing-sm);
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background-color: var(--white);
}

.activity-item:hover {
    border-color: var(--gray-dark);
    transform: translateY(-3px);
}

.activity-item h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.activity-item p {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.activity-period {
    font-size: 0.85rem;
    color: var(--gray-medium);
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.image-placeholder {
    width: 100%;
    max-width: 300px;
    height: 300px;
    background-color: var(--white);
    border: 1px solid var(--gray);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

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

.placeholder-content i {
    font-size: 2.5rem;
    color: var(--gray-medium);
    margin-bottom: var(--spacing-sm);
}

.image-subtext {
    font-size: 0.9rem;
    color: var(--gray-medium);
    margin-top: 2px;
}

/* Skills Section */
.skills {
    padding: var(--spacing-xl) 0;
}

.skills-classification {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category {
    padding: var(--spacing-md);
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background-color: var(--white);
}

.skill-category:hover {
    border-color: var(--black);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--gray);
}

.category-icon {
    font-size: 1.5rem;
    color: var(--black);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    padding: 6px 12px;
    border: 1px solid var(--gray);
    font-size: 0.9rem;
    color: var(--gray-dark);
    border-radius: 20px;
    transition: var(--transition);
}

.skill-tag:hover {
    background-color: var(--black);
    color: var(--white);
    border-color: var(--black);
}

/* Certifications Section */
.certifications {
    padding: var(--spacing-xl) 0;
    background-color: var(--gray-light);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.cert-card {
    padding: var(--spacing-md);
    border: 1px solid var(--gray);
    background-color: var(--white);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-radius: var(--border-radius);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--black);
}

.cert-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.cert-icon i {
    font-size: 1.8rem;
    color: var(--black);
}

.cert-card h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.cert-card p {
    font-size: 0.9rem;
    color: var(--gray-dark);
    margin-bottom: 6px;
}

.cert-issuer {
    font-size: 0.85rem;
    color: var(--gray-medium);
    margin-top: auto;
}

/* Projects Section */
.projects {
    padding: var(--spacing-xl) 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--white);
    border: 1px solid var(--gray);
    transition: var(--transition);
    overflow: hidden;
    height: 100%;
    border-radius: var(--border-radius);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--black);
}

.project-image {
    height: 160px;
    background-color: var(--gray-light);
    border-bottom: 1px solid var(--gray);
    display: flex;
    justify-content: center;
    align-items: center;
}

.project-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content p {
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--spacing-md);
}

.project-tech span {
    padding: 4px 10px;
    border: 1px solid var(--gray);
    font-size: 0.85rem;
    color: var(--gray-dark);
    border-radius: 3px;
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: auto;
    flex-wrap: wrap;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
}

.project-link:hover {
    text-decoration: underline;
}

/* Contact Section */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--gray-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info p {
    margin-bottom: var(--spacing-md);
}

.contact-details p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--gray);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--black);
    color: var(--white);
    transform: translateY(-2px);
}

/* Form Styles - Fixed */
.form-group {
    position: relative;
    margin-bottom: var(--spacing-lg);
    width: 100%;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 0;
    font-size: 0.95rem;
    border: none;
    border-bottom: 1px solid var(--gray);
    background-color: transparent;
    outline: none;
    transition: var(--transition);
    resize: none;
}

.form-group textarea {
    min-height: 120px;
    padding-top: 12px;
}

.form-group label {
    position: absolute;
    top: 12px;
    left: 0;
    font-size: 0.95rem;
    color: var(--gray-medium);
    pointer-events: none;
    transition: var(--transition);
}

.form-group textarea + label {
    top: 12px;
}

.form-group input:focus,
.form-group textarea:focus {
    border-bottom-color: var(--black);
}

.form-group input:focus ~ label,
.form-group textarea:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -20px;
    font-size: 0.85rem;
    color: var(--gray-dark);
}

.underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--black);
    transition: var(--transition);
}

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

/* Remove placeholder text from form fields */
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: transparent;
}

/* Footer - Fixed */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--gray);
    background-color: var(--white);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    width: 100%;
    text-align: center;
}

.copyright {
    font-size: 0.9rem;
    color: var(--gray-dark);
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xs);
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--gray-medium);
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--black);
}

.footer-note {
    font-size: 0.85rem;
    color: var(--gray-medium);
    text-align: center;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--gray);
    width: 100%;
    line-height: 1.5;
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

.delay-4 {
    animation-delay: 0.4s;
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

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

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

/* Responsive Styles */
@media (max-width: 992px) {
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .about-image {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    .activities-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-classification {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0.6rem 0;
    }
    
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--gray);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .menu-toggle.active .menu-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active .menu-line:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active .menu-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: calc(var(--spacing-xl) + 60px) 0 var(--spacing-xl);
        min-height: 85vh;
    }
    
    .cert-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .skill-tags {
        justify-content: center;
    }
    
    .project-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Custom Alert Styles */
.custom-alert {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 400px;
    background: var(--white);
    border-left: 4px solid var(--gray-dark);
    box-shadow: var(--shadow-hover);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 9999;
    transform: translateX(120%);
    transition: transform 0.3s ease;
    border: 1px solid var(--gray);
}

.custom-alert.show {
    transform: translateX(0);
}

.custom-alert.success {
    border-left-color: #10b981;
}

.custom-alert.error {
    border-left-color: #ef4444;
}

.custom-alert.info {
    border-left-color: #3b82f6;
}

.alert-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

.alert-content i {
    font-size: 1.2rem;
}

.custom-alert.success .alert-content i {
    color: #10b981;
}

.custom-alert.error .alert-content i {
    color: #ef4444;
}

.custom-alert.info .alert-content i {
    color: #3b82f6;
}

.alert-content span {
    font-size: 0.9rem;
    color: var(--gray-dark);
    line-height: 1.4;
}

.alert-close {
    background: none;
    border: none;
    color: var(--gray-medium);
    cursor: pointer;
    padding: 4px;
    margin-left: var(--spacing-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.alert-close:hover {
    color: var(--black);
}

/* Responsive alerts */
@media (max-width: 768px) {
    .custom-alert {
        left: 20px;
        right: 20px;
        max-width: none;
        transform: translateY(-150%);
    }
    
    .custom-alert.show {
        transform: translateY(0);
    }
}