/* Root Variables */
:root {
    --bg-gray: #525659;
    --paper-white: #ffffff;
    --text-dark: #1a1a1a;
    --text-gray: #4a4a4a;
    --text-light: #6a6a6a;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --border-gray: #e5e5e5;
    --error-red: #dc2626;
    --error-bg: #fee2e2;
    --success-green: #10b981;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transition timings */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-gray);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--accent-blue-hover);
    text-decoration: underline;
}

a:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Action Bar */
.action-bar {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border-gray);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.action-bar-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.language-toggle {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-gray);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
    position: relative;
}

.lang-btn:hover:not(.active) {
    border-color: var(--accent-blue);
    background: #f0f9ff;
    transform: translateY(-1px);
}

.lang-btn:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.lang-btn.active {
    border-color: var(--accent-blue);
    background: var(--accent-blue);
    color: white;
}

/* Loading state for buttons */
.lang-btn[aria-busy="true"] {
    opacity: 0.7;
    cursor: wait;
    pointer-events: none;
}

.export-actions {
    display: flex;
    gap: 0.5rem;
}

.export-btn {
    padding: 0.5rem 1.5rem;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow);
}

.export-btn:hover {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.export-btn:focus-visible {
    outline: 2px solid white;
    outline-offset: 2px;
}

/* HTMX Indicator */
.htmx-indicator {
    display: none;
    align-items: center;
    gap: 0.5rem;
}

.htmx-indicator.htmx-request {
    display: flex;
}

.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--accent-blue);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

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

/* CV Container - Paper Effect */
.cv-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.cv-paper {
    background: var(--paper-white);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    min-height: 11in; /* A4 height */
    /* HTMX swap transitions */
    transition: opacity var(--transition-base);
}

/* HTMX swap animation */
.cv-paper.htmx-swapping {
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.cv-paper.htmx-settling {
    opacity: 1;
    transition: opacity var(--transition-base);
}

/* Error Toast */
.error-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--error-bg);
    color: var(--error-red);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--error-red);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 400px;
    z-index: 1000;
    animation: slideIn var(--transition-base) ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.error-toast button {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--error-red);
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-base);
}

.error-toast button:hover {
    opacity: 0.7;
}

/* CV Header */
.cv-header {
    border-bottom: 3px solid var(--accent-blue);
    padding-bottom: 2rem;
    margin-bottom: 2rem;
}

.cv-header-main {
    margin-bottom: 1.5rem;
}

.cv-name {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.cv-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-gray);
}

.cv-contact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    font-size: 0.9rem;
}

.contact-item {
    color: var(--text-gray);
}

/* Sections */
.cv-section {
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-gray);
}

.summary-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-gray);
    text-align: justify;
}

/* AI Development Section */
.ai-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-blue);
}

.ai-period {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
    font-style: italic;
}

.ai-description {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.ai-skills {
    display: grid;
    gap: 1.5rem;
}

.ai-skill-category {
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

.ai-skill-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.proficiency-badge {
    background: var(--accent-blue);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    margin-left: 0.5rem;
}

.ai-skill-list {
    list-style: none;
    display: grid;
    gap: 0.5rem;
}

.ai-skill-list li:before {
    content: "✨ ";
    margin-right: 0.5rem;
}

.ai-achievements {
    margin-top: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: 6px;
}

.ai-achievements h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

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

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

.achievement-list li:before {
    content: "🏆 ";
    margin-right: 0.5rem;
}

/* Experience Items */
.experience-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-gray);
}

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

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

.experience-title {
    flex: 1;
}

.position {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.company {
    font-size: 0.95rem;
    color: var(--text-gray);
    font-weight: 500;
}

.experience-period {
    font-size: 0.9rem;
    color: var(--text-light);
    white-space: nowrap;
    font-style: italic;
}

.responsibilities {
    list-style: none;
    margin-bottom: 1rem;
}

.responsibilities li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
}

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

.technologies {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-top: 1rem;
}

.highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.highlight-badge {
    background: #fef3c7;
    color: #92400e;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.skill-category {
    background: #f9fafb;
    padding: 1.5rem;
    border-radius: 6px;
    border-left: 3px solid var(--accent-blue);
}

.skill-category-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.proficiency-stars {
    color: #fbbf24;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.skill-items {
    list-style: none;
}

.skill-items li {
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
}

.skill-items li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

.soft-skills {
    margin-top: 2rem;
}

.soft-skills h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.soft-skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.soft-skill-tag {
    background: #e0e7ff;
    color: #3730a3;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Projects */
.project-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-gray);
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.project-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.project-period {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.project-role {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.project-url {
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.project-description {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.project-highlights {
    list-style: none;
    margin-top: 1rem;
}

.project-highlights li {
    padding-left: 1.5rem;
    margin-bottom: 0.25rem;
    position: relative;
}

.project-highlights li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Education */
.education-item {
    margin-bottom: 1.5rem;
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.degree {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.education-period {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.institution {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.field {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Certifications */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.certification-item {
    background: #f9fafb;
    padding: 1.25rem;
    border-radius: 6px;
    border-left: 3px solid #10b981;
}

.certification-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.certification-issuer {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.certification-date {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Awards */
.award-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-gray);
}

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

.award-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.award-issuer {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.award-description {
    font-size: 0.95rem;
    color: var(--text-gray);
}

/* Languages */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.language-item {
    text-align: center;
    padding: 1.5rem;
    background: #f9fafb;
    border-radius: 6px;
}

.language-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.language-proficiency {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .cv-paper {
        padding: 1.5rem;
    }

    .cv-name {
        font-size: 2rem;
    }

    .cv-title {
        font-size: 1.2rem;
    }

    .action-bar-content {
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
    }

    .language-toggle {
        width: 100%;
        flex-wrap: wrap;
    }

    .lang-btn {
        flex: 1;
        min-width: 120px;
    }

    .export-actions {
        width: 100%;
    }

    .export-btn {
        width: 100%;
    }

    .error-toast {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: none;
    }

    .experience-header,
    .project-header,
    .education-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .experience-period,
    .project-period,
    .education-period {
        align-self: flex-start;
    }

    .skills-grid,
    .certifications-grid,
    .languages-grid {
        grid-template-columns: 1fr;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print-specific hiding */
.no-print {
    /* Will be hidden in print.css */
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .lang-btn {
        border-width: 3px;
    }

    .lang-btn:focus-visible,
    .export-btn:focus-visible,
    a:focus-visible {
        outline-width: 3px;
    }
}