* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #2c3e50;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: rgba(255, 255, 255, 0);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 30;
    min-height: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0);
    transition: background 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: rgba(44, 62, 80, 0);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    transition: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    flex: 1;
    justify-content: flex-end;
}

@media (max-width: 479px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 20px;
    }
    
    .nav-links {
        justify-content: center;
        gap: 1rem;
    }
    
    .logo {
        position: static;
        transform: none;
    }
}

.nav-links a {
    text-decoration: none;
    color: rgba(51, 51, 51, 0);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #3498db;
}

/* Hero Section */
#hero {
    position: relative;
    height: 600px;
    color: white;
    text-align: center;
    margin-top: 60px;
}

.hero-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -2;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    filter: brightness(0.6) contrast(1.2);
}

.hero-image.active {
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 20;
    padding-top: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cta-separator {
    width: 0;
    height: 20px;
    border-left: 1px solid rgba(255, 255, 255, 0.7);
    margin: 0 1rem;
    flex-shrink: 0;
}

.hero-cta h2 {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.hero-cta a {
    display: inline-block;
    background: transparent;
    color: white;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-cta a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

@media (max-width: 1199px) {
    .hero-content h1 { font-size: 2.5rem; }
}

@media (max-width: 767px) {
    .hero-content h1 { font-size: 2rem; }
}

@media (max-width: 419px) {
    .hero-content h1 { font-size: 1.5rem; }
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: white;
}

@media (max-width: 1199px) {
    .hero-content p { font-size: 1.25rem; }
}

@media (max-width: 767px) {
    .hero-content p { font-size: 1rem; }
}

@media (max-width: 419px) {
    .hero-content p { font-size: 0.875rem; }
}

.content-wrapper {
    position: absolute;
    top: 100vh;
    left: 0;
    right: 0;
    z-index: 1;
    transition: top 0.6s ease-out;
}

.cta-button {
    display: inline-block;
    background: #fff;
    color: #667eea;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Sections */
section {
    padding: 40px 0;
}

#contact {
    background: #2c3e50;
}

#about {
    background: #2c3e50;
}

#about h2 {
    color: white;
}

#about p {
    color: white;
}

#projects {
    background: #f5f5dc;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #2c3e50;
    margin: 0;
    padding: 0;
}

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

#contact h2 {
    color: white;
}

.about-content {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    position: relative;
    overflow: hidden;
}

@media (max-width: 699px) {
    .about-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .about-text {
        flex: 1;
        width: 100%;
    }
    
    .education-panel {
        flex: 1;
        width: 100%;
    }
}

.about-text {
    flex: 1;
}

.education-panel {
    flex: 1;
    background: #1a252f;
    padding: 20px;
    margin-top: 0;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.education-panel:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.education-panel h2 {
    color: white;
    margin-bottom: 1rem;
    margin-top: 0;
    font-size: 1.2rem;
}

.education-panel p {
    color: white;
    text-align: left;
    margin: 0 0 1rem 0;
}

.education-panel hr {
    margin: 1rem 0;
}

.education-subtitle {
    font-size: 0.9rem;
    color: #ccc;
    margin: -0.5rem 0 1rem 0;
}

.education-panel .education-subtitle:first-of-type {
    text-align: center;
}

.education-cta {
    background: rgba(255, 255, 255, 0.05);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
    display: block;
    text-align: left;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.education-cta:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #2c3e50;
}

.education-cta:hover .education-subtitle {
    color: #2c3e50;
}

.education-cta p {
    margin: 0;
}

.minimize-button {
    background: rgba(255, 255, 255, 0.05);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    margin: 0 auto;
    display: block;
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.minimize-button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #2c3e50;
}

#courses-title {
    color: white;
    text-align: center;
    margin-bottom: 1rem;
    font-size: clamp(1rem, 2vw, 1.5rem);
    white-space: nowrap;
}

@media (max-width: 399px) {
    #courses-title {
        white-space: normal;
    }
}

.title-button-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.1rem !important;
    position: absolute;
    left: 50%;
    top: 0px;
    transform: translateX(-50%);
    z-index: 10;
}

.cards-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2rem;
    width: 100%;
    position: absolute;
    top: 100px;
    left: 0;
    right: 0;
    overflow: visible;
}

.cards-wrapper {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 600px;
}

#about-content {
    transition: transform 1s ease, opacity 1s ease;
}

#education-panel {
    transition: transform 1s ease, opacity 1s ease;
}

.about-content.expanded #about-content {
    transform: translateX(-300%);
    opacity: 0;
}

.about-content.expanded #education-panel {
    transform: translateX(300%);
    opacity: 0;
}

.education-card {
    width: 100%;
    height: 60px;
    background: white;
    border-radius: 5px;
    padding: 1rem;
    box-shadow: none;
    transition: all 0.3s ease;
    cursor: pointer;
    transform-origin: center;
    position: relative;
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.education-card.expanded {
    height: auto;
    min-height: 120px;
}

.education-card p {
    opacity: 0;
    max-height: 0;
    transition: opacity 0.3s ease, max-height 0.3s ease;
    overflow: hidden;
}

.education-card.expanded p {
    opacity: 1;
    max-height: 200px;
}

/* Beige background for in progress courses */
.education-card[data-index="0"],
.education-card[data-index="1"] {
    background: #f5f5dc;
}

@media (max-width: 1115px) {
    .cards-wrapper {
        max-width: 100%;
    }
}

.about-content.expanded {
    min-height: 810px;
}

.certificates-note {
    color: white;
    text-align: center;
    font-size: 0.9rem;
    margin-top: 2rem;
    opacity: 0.8;
}

.education-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.education-card p {
    color: #333 !important;
    margin: 0;
    font-size: 0.9rem;
}

.course-link {
    text-decoration: none;
    display: none;
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, display 0.3s ease;
}

.education-card.expanded .course-link {
    display: block;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.visit-course-btn {
    background: #2c3e50;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.visit-course-btn:hover {
    background: #34495e;
}

/* Button container for education cards */
.education-card .button-container {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.education-card .education-view-project-btn {
    background: #2c3e50;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.education-card .education-view-project-btn:hover {
    background: #34495e;
}

.education-separator {
    width: 100%;
    height: 3px;
    background: white;
    margin: 20px 0;
    border-radius: 2px;
}

.nav-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1.5rem;
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    transform: scale(1);
}

section p {
    text-align: center;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 3rem;
    color: #666;
}

/* Projects Grid */
.about-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.profile-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.about-text h2 {
    margin: 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-auto-rows: min-content;
    gap: 2rem;
    margin-top: 3rem;
    align-items: start;
    position: relative;
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.project-card.selected {
    grid-column: 1;
    grid-row: 1;
    padding: 1.5rem;
    transform: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    z-index: 1;
    position: relative;
}

.view-project-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    color: #2c3e50;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}

.project-card:not(.selected) .view-project-btn {
    display: none;
}

.project-card .view-course-btn {
    background: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    color: #2c3e50;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
}

.project-card .view-course-btn:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Button container for project cards */
.project-card .button-container {
    display: flex;
    gap: 0.25rem;
    margin-top: 1rem;
}

.project-card .button-container .project-link {
    flex: 1;
}

.project-card .button-container .view-project-btn {
    position: relative !important;
    top: auto !important;
    right: auto !important;
    margin: 0;
}

.project-card[data-index="1"]:not(.selected) .tech-stack,
.project-card[data-index="1"]:not(.selected) .development-panel {
    display: none;
}

/* Project Image Gallery */
.project-image-gallery {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    max-width: 280px;
}

.project-image-panel {
    flex: 1;
    max-width: 136px;
    background: white;
    border-radius: 8px;
    padding: 0.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    aspect-ratio: 3 / 4;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-image-panel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
}

/* Hide image gallery on unselected cards */
.project-card[data-index="3"]:not(.selected) .project-image-gallery {
    display: none;
}

.project-card:not(.selected) {
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    cursor: pointer;
    position: relative;
    top: auto;
    right: auto;
}

.watch-demo-btn {
    top: 1rem;
    right: 8rem; 
}

.view-course-btn {
    top: 1rem;
    right: 8rem; 
}

.project-card[data-index="0"].selected .card-title::after {
    content: "";
    display: inline-block;
    width: 120px;
    height: 40px;
    margin-left: 1.5rem;
    margin-top: -3px;
    background-image: url('images/sinceai.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    vertical-align: top;
}

.project-card[data-index="0"].selected .card-title {
    display: block !important;
}

/* Selected card in column 1, spanning full height */
.project-card.selected {
    grid-column: 1;
    grid-row: 1 / span 4;
}

/* Unselected cards positioned absolutely in column 2 with fixed top offsets */
.project-card:not(.selected) {
    grid-column: 2;
    grid-row: 1;
    position: relative;
    align-self: start;
}

/* Stacked positioning for unselected cards */
.project-card[data-index="0"]:not(.selected) { top: 0; }
.project-card[data-index="1"]:not(.selected) { top: 0; }
.project-card[data-index="2"]:not(.selected) { top: 0; }
.project-card[data-index="3"]:not(.selected) { top: 0; }

/* When cards are unselected, offset them based on their data-index */
.projects-grid:has(.project-card[data-index="0"].selected) .project-card[data-index="1"]:not(.selected) { margin-top: 0; }
.projects-grid:has(.project-card[data-index="0"].selected) .project-card[data-index="2"]:not(.selected) { margin-top: 110px; }
.projects-grid:has(.project-card[data-index="0"].selected) .project-card[data-index="3"]:not(.selected) { margin-top: 220px; }

.projects-grid:has(.project-card[data-index="1"].selected) .project-card[data-index="0"]:not(.selected) { margin-top: 0; }
.projects-grid:has(.project-card[data-index="1"].selected) .project-card[data-index="2"]:not(.selected) { margin-top: 110px; }
.projects-grid:has(.project-card[data-index="1"].selected) .project-card[data-index="3"]:not(.selected) { margin-top: 220px; }

.projects-grid:has(.project-card[data-index="2"].selected) .project-card[data-index="0"]:not(.selected) { margin-top: 0; }
.projects-grid:has(.project-card[data-index="2"].selected) .project-card[data-index="1"]:not(.selected) { margin-top: 110px; }
.projects-grid:has(.project-card[data-index="2"].selected) .project-card[data-index="3"]:not(.selected) { margin-top: 220px; }

.projects-grid:has(.project-card[data-index="3"].selected) .project-card[data-index="0"]:not(.selected) { margin-top: 0; }
.projects-grid:has(.project-card[data-index="3"].selected) .project-card[data-index="1"]:not(.selected) { margin-top: 110px; }
.projects-grid:has(.project-card[data-index="3"].selected) .project-card[data-index="2"]:not(.selected) { margin-top: 220px; }

.project-card:not(.selected) h3 {
    margin: 0;
    font-size: 1.2rem;
}

.project-card:not(.selected) p,
.project-card:not(.selected) a,
.project-card:not(.selected) .tech-stack,
.project-card:not(.selected) .development-panel {
    display: none;
}

.project-card:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.project-card.selected[data-index="2"] {
    background-image: url('images/coinescape.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(255, 255, 255, 0.9);
    background-blend-mode: overlay;
}

.project-card.selected[data-index="3"] {
    background-image: url('images/bokacha.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(255, 255, 255, 0.9);
    background-blend-mode: overlay;
}

.project-card.selected[data-index="1"] h3 {
    font-size: 1.5rem;
}

.project-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.project-card p {
    text-align: left;
    margin-bottom: 1.5rem;
    color: #666;
}

.project-card.selected[data-index="1"] {
    background-image: url('images/zonetask.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(255, 255, 255, 0.9);
    background-blend-mode: overlay;
}

.tech-stack {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tech-stack h4 {
    text-align: center;
    margin: 0 0 1rem 0;
    font-size: 1rem;
    color: #2c3e50;
}

.tech-stack-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.tech-category {
    background: #f8f9fa;
    padding: 0.75rem;
    border-radius: 6px;
    border: 1px solid #e9ecef;
    margin-bottom: 0;
}

.tech-category:last-child {
    margin-bottom: 0;
}

.tech-category h5 {
    font-size: 0.9rem;
    margin: 0 0 0.25rem 0;
    color: #2c3e50;
    font-weight: 600;
}

.tech-stack ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-stack li {
    background: #f8f9fa;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #2c3e50;
    border: 1px solid #e9ecef;
}

.docker-item {
    background: #f8f9fa !important;
    opacity: 0.5;
    border: 1px solid #e9ecef !important;
    color: #2c3e50 !important;
}

.development-panel {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.development-panel p {
    margin: 0;
    font-size: 0.9rem;
    color: #2c3e50;
}

.project-link:hover {
    color: #2980b9;
}

.contact-email {
    color: white;
    font-size: 1.1rem;
    margin-top: 1.5rem;
    text-align: center;
}

.contact-email a {
    color: white;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.contact-email a:hover {
    color: #3498db;
}

.contact-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.contact-links {
    display: flex;
    gap: 2rem;
}

.contact-links a {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.contact-links a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin: 0;
}

@media (max-width: 1100px) {
    .projects-grid {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }
    
    .project-card.selected {
        width: 100%;
        position: relative;
    }
    
    .project-card:not(.selected) {
        position: relative;
        top: auto;
        right: auto;
        width: 100%;
        flex-direction: row;
        justify-content: center;
        gap: 2rem;
        grid-row: auto;
    }
    
    .top-unselected,
    .bottom-unselected {
        top: auto !important;
    }
    
    .project-card.selected {
        grid-column: 1;
        grid-row: auto;
    }
    
    .project-card[data-index="0"],
    .project-card[data-index="1"],
    .project-card[data-index="2"],
    .project-card[data-index="3"] {
        grid-row: auto;
        margin-top: 0 !important;
    }
    
}

@media (max-width: 420px) {
    .project-image-gallery {
        flex-direction: column;
        max-width: none;
    }
    
    .project-image-panel {
        max-width: 200px;
        margin: 0 auto;
    }
    .project-card[data-index="0"].selected .card-title::after {
        width: 60px;
        height: 20px;
        margin-left: 0.5rem;
    }
    
    .project-card[data-index="0"].selected .card-title {
        font-size: 1rem;
    }
    
    .hero-content {
        gap: 0rem;
    }
    
    .cta-separator {
        margin: 0 0rem;
    }
}

@media (max-width: 700px) {
    .view-project-btn,
    .watch-demo-btn,
    .view-course-btn {
        position: absolute !important;
        top: 4rem !important;
        right: auto !important;
        margin: 0;
    }
    
    .view-project-btn {
        left: 0.5rem !important;
    }
    
    .watch-demo-btn,
    .view-course-btn {
        left: calc(0.5rem + 120px) !important;
    }
    
    .project-card.selected p:first-of-type {
        margin-top: 4.5rem;
    }
    
    .project-card.selected .development-panel p {
        margin-top: 0;
    }
}