/* CSS Variables for theming - Classic black and white */
:root {
    --font-family-base: 'Times New Roman', Times, serif;
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-text: #000000;
    --color-text-light: #666666;
    --color-text-lighter: #888888;
    --color-surface: #ffffff;
    --color-background: #ffffff;
    --color-border: #000000;
    --color-accent: #000000;
    --color-accent-hover: #333333;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 0px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
}

/* Dark mode variables */
.dark-mode {
    --color-text: #ffffff;
    --color-text-light: #cccccc;
    --color-surface: #000000;
    --color-background: #000000;
    --color-border: #ffffff;
    --color-accent: #ffffff;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navigation */
.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 2px solid var(--color-border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toggle-container {
    display: flex;
    align-items: center;
}

#mode-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: 1px solid var(--color-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    color: var(--color-text);
    font-size: 0.875rem;
    font-family: var(--font-family-base);
}

#mode-toggle:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
}

.nav-link {
    color: var(--color-text);
    text-decoration: underline;
    font-weight: normal;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-left: var(--spacing-sm);
    font-family: var(--font-family-base);
}

.nav-link:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
    text-decoration: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.name {
    font-size: 4rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.title {
    font-size: 1.75rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.bio {
    font-size: 1.375rem;
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.github-profile {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.github-link {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin: 0;
}

.github-profile-link {
    color: var(--color-text);
    text-decoration: underline;
    font-weight: 500;
    font-family: var(--font-family-base);
}

.github-profile-link:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
    text-decoration: none;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-xl);
    background-color: var(--color-surface);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.section-title {
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    font-family: var(--font-family-base);
}

/* Experience */
.experience-item {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.experience-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.company-name, .school-name {
    font-size: 1.625rem;
    font-weight: 600;
    color: var(--color-text);
}

.role {
    margin: var(--spacing-sm) 0;
}

.role-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.role-period {
    color: var(--color-text-light);
    font-weight: 500;
}

.role-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin: var(--spacing-sm) 0;
    line-height: 1.6;
}

.achievements {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.achievements li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
    line-height: 1.6;
    font-size: 1.125rem;
}

.achievements li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* Skills */
.skills-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.skill-category {
    background-color: var(--color-background);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.skill-category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
    font-family: var(--font-family-base);
}

.skills-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.skills-list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-light);
    font-size: 1.125rem;
    line-height: 1.5;
    border-bottom: 1px dotted var(--color-border);
}

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

@media (max-width: 768px) {
    .skills-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .skill-category-title {
        font-size: 1.125rem;
    }

    .skills-list li {
        font-size: 1rem;
    }
}

/* Education */
.education-item {
    background-color: var(--color-background);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.degree {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    margin: var(--spacing-sm) 0;
}

/* Map */
.map-container {
    height: 400px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: calc(80px + var(--spacing-md)) var(--spacing-sm) var(--spacing-lg);
    }
    
    .name {
        font-size: 2rem;
    }
    
    .title {
        font-size: 1.25rem;
    }
    
    .bio {
        font-size: 1rem;
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-link {
        margin-left: var(--spacing-xs);
        font-size: 0.875rem;
    }
    
    .section {
        padding: var(--spacing-md);
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

/* Projects specific styles */
.project-content {
    font-size: 1.125rem;
    line-height: 1.7;
}

.project-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

.project-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.project-link {
    color: var(--color-text);
    text-decoration: underline;
    font-weight: 500;
}

.project-link:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
    text-decoration: none;
}

.video-container, .image-container {
    margin: var(--spacing-xl) 0;
}

.video-container video {
    max-width: 100%;
    height: auto;
}

.image-container img {
    max-width: 100%;
    height: auto;
}

/* ML Interface styles */
.inference-section {
    margin-bottom: var(--spacing-xl);
    transition: min-height 0.3s ease;
}

.inference-placeholder {
    text-align: center;
    padding: var(--spacing-md) 0;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.inference-placeholder p {
    font-size: 1rem;
    color: var(--color-text-light);
    font-style: italic;
    margin: 0;
}

.inference-results {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
    min-height: 400px;
}

/* Compact 4x9 image grid */
.compact-image-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 4px;
    max-width: 720px;
    margin: var(--spacing-md) auto;
    padding: var(--spacing-sm);
}

.compact-image-item {
    cursor: pointer;
    transition: transform 0.2s ease;
    border: 2px solid transparent;
}

.compact-image-item:hover {
    transform: scale(1.05);
    border-color: var(--color-accent);
}

.compact-sample-image {
    width: 100%;
    height: 60px;
    object-fit: cover;
    border: 1px solid var(--color-border);
    display: block;
}

/* Legacy styles for compatibility */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.image-item {
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.image-item:hover {
    transform: scale(1.05);
}

.sample-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.image-label {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.selected-image-container {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.selected-image {
    max-width: 300px;
    height: auto;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.prediction-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.predictions-list {
    max-width: 600px;
    margin: 0 auto;
}

.prediction-item {
    display: grid;
    grid-template-columns: 2fr 1fr 3fr;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.prediction-item:last-child {
    border-bottom: none;
}

.breed-name {
    font-weight: 500;
    color: var(--color-text);
}

.confidence-score {
    text-align: right;
    font-weight: 600;
    color: var(--color-text-light);
}

.confidence-bar {
    height: 8px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background-color: var(--color-accent);
    transition: width 0.5s ease;
}

.actual-answer {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--color-accent);
    text-align: center;
    background-color: var(--color-background);
}

.correct-answer {
    background-color: var(--color-surface);
    border-left: 4px solid var(--color-accent);
    padding-left: calc(var(--spacing-sm) + 4px);
}

@media (max-width: 768px) {
    .compact-image-grid {
        grid-template-columns: repeat(6, 1fr);
        max-width: 480px;
        gap: 3px;
    }

    .compact-sample-image {
        height: 50px;
    }

    .inference-results {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        min-height: 300px;
    }

    .inference-placeholder {
        min-height: 60px;
    }

    .inference-placeholder p {
        font-size: 0.875rem;
    }

    /* Legacy mobile styles */
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }

    .sample-image {
        height: 120px;
    }

    .prediction-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        text-align: center;
    }

    .confidence-score {
        text-align: center;
    }
}

/* Scroll Animation Styles */
.fade-in-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.skill-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
}

.skill-card-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--spacing-md) 0;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.skill-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.skill-list li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
    line-height: 1.6;
    font-size: 1rem;
}

.skill-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-text);
    font-weight: bold;
}

.skill-tools {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-lighter);
    font-style: italic;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.project-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
}

.project-card-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--spacing-sm) 0;
}

.project-card-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin: 0 0 var(--spacing-md) 0;
    flex-grow: 1;
    line-height: 1.6;
}

.project-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.project-tag {
    display: inline-block;
    padding: 4px var(--spacing-sm);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.project-card-button {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-text);
    color: var(--color-surface);
    border: 2px solid var(--color-border);
    font-family: var(--font-family-base);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.project-card-button:hover {
    background-color: var(--color-surface);
    color: var(--color-text);
}

.project-card-link,
.project-card-link:hover,
.project-card-link:visited {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card-link .project-card-title,
.project-card-link .project-card-description,
.project-card-link .project-tag {
    text-decoration: none;
}

.project-card-link .project-card {
    height: 100%;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    overflow-y: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    opacity: 1;
}

.modal-content {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    max-width: 900px;
    width: 100%;
    margin: auto;
    position: relative;
    padding: var(--spacing-xl);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: 2px solid var(--color-border);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.modal-close:hover {
    background-color: var(--color-text);
    color: var(--color-surface);
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--spacing-sm) 0;
    padding-right: var(--spacing-xl);
}

.modal-subtitle {
    font-size: 1.375rem;
    color: var(--color-text-light);
    margin: 0 0 var(--spacing-xl) 0;
    font-weight: 500;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-project-content {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-light);
}

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

.modal-project-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
}

.modal-project-content ul {
    margin-bottom: var(--spacing-lg);
}

/* Responsive styles for new components */
@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .skill-card {
        padding: var(--spacing-md);
    }

    .skill-card-title {
        font-size: 1.125rem;
    }

    .skill-list li {
        font-size: 0.875rem;
    }

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

    .project-card {
        padding: var(--spacing-md);
    }

    .project-card-title {
        font-size: 1.125rem;
    }

    .project-card-description {
        font-size: 0.875rem;
    }

    .modal-content {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }

    .modal-title {
        font-size: 1.75rem;
        padding-right: var(--spacing-lg);
    }

    .modal-subtitle {
        font-size: 1.125rem;
    }

    .modal-project-content {
        font-size: 1rem;
    }

    .modal-close {
        width: 36px;
        height: 36px;
        font-size: 1.5rem;
    }
}

/* Contact Form Styles */
.contact-form {
    max-width: 800px;
    margin: 0 auto;
}

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

.form-group {
    margin-bottom: var(--spacing-md);
}

.contact-label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.contact-input,
.contact-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-family-base);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.contact-input:focus,
.contact-textarea:focus {
    outline: none;
    border-color: var(--color-text);
}

.contact-textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-submit {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-text);
    color: var(--color-surface);
    border: 2px solid var(--color-border);
    font-family: var(--font-family-base);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.contact-submit:hover:not(:disabled) {
    background-color: var(--color-surface);
    color: var(--color-text);
}

.contact-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.contact-status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    text-align: center;
    font-size: 1rem;
    border: 1px solid transparent;
}

.contact-status-success {
    color: var(--color-text);
    background-color: var(--color-background);
    border-color: var(--color-text);
}

.contact-status-error {
    color: var(--color-text);
    background-color: var(--color-background);
    border-color: var(--color-text);
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .contact-form {
        max-width: 100%;
    }
}