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

:root {
    --primary-blue: #0066CC;
    --dark-blue: #003366;
    --light-blue: #4D94FF;
    --black: #000000;
    --dark-gray: #1A1A1A;
    --gray: #333333;
    --light-gray: #666666;
    --white: #FFFFFF;
    --font-primary: "Inter", sans-serif;
}

body {
    font-family: var(--font-primary);
    color: var(--white);
    background-color: var(--black);
    line-height: 1.6;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }

/* Header */
.site-header {
    background-color: var(--black);
    border-bottom: 1px solid var(--gray);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
}

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

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--white);
    margin: 5px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--black) 0%, var(--dark-gray) 100%);
}

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

.hero-title {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.hero-subtitle {
    color: var(--light-blue);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--light-gray);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Sections */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--white);
}

/* Skills Section */
.skills {
    padding: 4rem 0;
    background-color: var(--dark-gray);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background-color: var(--gray);
    padding: 2rem;
    border-radius: 10px;
    transition: transform 0.3s;
}

.skill-card:hover {
    transform: translateY(-5px);
    border: 1px solid var(--primary-blue);
}

.skill-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

/* Projects Section */
.recent-projects {
    padding: 4rem 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--dark-gray);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--gray);
}

.project-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

/* About Page */
.about-page {
    padding: 4rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    margin-bottom: 4rem;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.3);
}

.about-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.detail-section {
    background-color: var(--dark-gray);
    padding: 2rem;
    border-radius: 10px;
}

.certifications-list {
    list-style: none;
}

.certifications-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray);
}

.certifications-list li:last-child {
    border-bottom: none;
}

/* Tech Tags */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* Experience Page */
.work-experience {
    padding: 4rem 0;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.experience-item {
    background-color: var(--dark-gray);
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-blue);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.experience-title h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.company {
    color: var(--light-gray);
}

.experience-dates .date {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.responsibilities {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.responsibilities li {
    margin-bottom: 0.5rem;
}

/* Footer */
.site-footer {
    background-color: var(--dark-gray);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--gray);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand p {
    color: var(--light-gray);
    margin-top: 1rem;
}

.footer-links h3,
.footer-contact h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--light-gray);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-blue);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    color: var(--light-blue);
    text-decoration: none;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray);
    color: var(--light-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--black);
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-details {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .experience-header {
        flex-direction: column;
        gap: 1rem;
    }
}

/* List Page Styles */
.list-page {
    padding: 4rem 0;
}

.projects-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 3rem;
}

.project-item {
    background-color: var(--dark-gray);
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-blue);
}

.project-item h2 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.project-item h2 a {
    color: inherit;
    text-decoration: none;
}

.project-item h2 a:hover {
    text-decoration: underline;
}

/* Terms/Taxonomy Page */
.terms-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.term-item {
    background-color: var(--dark-gray);
    padding: 1rem;
    border-radius: 5px;
}

.term-item h2 {
    display: inline;
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

.term-item a {
    color: var(--light-blue);
    text-decoration: none;
}

.term-item a:hover {
    text-decoration: underline;
}

.term-count {
    color: var(--light-gray);
    font-size: 0.9rem;
}

/* Videos Page Styles */
.videos-page {
    padding: 4rem 0;
}

.youtube-channel-info {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    padding: 2rem;
    border-radius: 10px;
    margin: 3rem 0;
    text-align: center;
}

.youtube-channel-info h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.youtube-channel-info p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

.youtube-channel-info a {
    color: var(--white);
    text-decoration: underline;
    font-weight: 600;
}

.youtube-channel-info a:hover {
    color: var(--light-blue);
}

/* Videos Grid */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Video Card */
.video-card {
    background-color: var(--dark-gray);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--gray);
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.3);
    border-color: var(--primary-blue);
}

/* Video Thumbnail */
.video-thumbnail {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.8);
    color: var(--white);
    padding: 3px 6px;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Video Info */
.video-info {
    padding: 1.5rem;
}

.video-title {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.video-title a {
    color: inherit;
    text-decoration: none;
}

.video-title a:hover {
    color: var(--primary-blue);
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--light-gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.video-description {
    color: var(--light-gray);
    font-size: 0.95rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Loading Spinner */
.loading-spinner {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary-blue);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.no-videos {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--light-gray);
    font-size: 1.1rem;
}

/* YouTube Subscribe Button */
.youtube-subscribe {
    display: inline-flex;
    align-items: center;
    background-color: #FF0000;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    transition: background-color 0.3s;
}

.youtube-subscribe:hover {
    background-color: #CC0000;
    color: white;
}

.youtube-subscribe svg {
    margin-right: 0.5rem;
}

/* Responsive Design for Videos */
@media (max-width: 768px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }

    .video-card {
        max-width: 100%;
    }
}

/* Cache badge */
.cache-badge {
    background-color: var(--primary-blue);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    margin-left: 10px;
    font-weight: 500;
}

/* Cache info footer */
.cache-info {
    grid-column: 1 / -1;
    text-align: center;
    padding: 1rem;
    background-color: rgba(0, 102, 204, 0.05);
    border-radius: 8px;
    margin-top: 1rem;
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.cache-info p {
    color: var(--light-gray);
    font-size: 0.9rem;
    margin: 0;
}

/* Refresh button */
.btn-refresh {
    background: none;
    border: none;
    color: var(--primary-blue);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0;
    margin-left: 5px;
}

.btn-refresh:hover {
    color: var(--light-blue);
}

/* Cache stats */
.cache-stats {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cache-stats p {
    color: var(--light-gray);
    font-size: 0.85rem;
}

/* Storage status */
.storage-status {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--dark-gray);
    padding: 10px 15px;
    border-radius: 5px;
    border: 1px solid var(--gray);
    font-size: 0.8rem;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.storage-status.hidden {
    display: none;
}