/* ========================================
   CV Styles - Modern & Professional
   ======================================== */

/* --- CSS Variables --- */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #475569;
    --color-accent: #0ea5e9;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-sidebar: #1e293b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-sidebar: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-sidebar: #334155;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Layout */
    --sidebar-width: 280px;
    --content-max-width: 800px;
    --header-height: 64px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* --- Dark Mode Support --- */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f172a;
        --color-bg-alt: #1e293b;
        --color-text: #f1f5f9;
        --color-text-light: #94a3b8;
        --color-border: #334155;
        --color-primary-light: #1e3a5f;
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* --- Layout --- */
.cv-container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
    max-width: 1100px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
    background: var(--color-bg);
}

/* --- Sidebar --- */
.sidebar {
    background: var(--color-bg-sidebar);
    color: var(--color-text-sidebar);
    padding: var(--space-xl) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar a {
    color: var(--color-accent);
}

.sidebar a:hover {
    color: #38bdf8;
}

/* Profile Section */
.profile-section {
    text-align: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border-sidebar);
}

.profile-image {
    margin-bottom: var(--space-md);
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-primary);
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-sidebar);
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.title {
    font-size: var(--font-size-base);
    color: var(--color-accent);
    font-weight: 500;
}

/* Section Title in Sidebar */
.section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-title::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

/* Contact Info */
.contact-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.contact-list li:hover {
    color: var(--color-text-sidebar);
}

.contact-list .icon {
    font-size: var(--font-size-base);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.contact-list a {
    color: var(--color-text-muted);
    word-break: break-all;
}

.contact-list a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

/* Skills */
.skill-category {
    margin-bottom: var(--space-lg);
}

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

.skill-category h4 {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.skill-tag {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
}

.sidebar .skill-tag {
    background: rgba(37, 99, 235, 0.2);
    color: #93c5fd;
}

/* Languages */
.language-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.language-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
}

.language-list .proficiency {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.language-list .proficiency.native {
    color: var(--color-success);
    font-weight: 600;
}

/* Interests */
.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.interest-tag {
    background: rgba(148, 163, 184, 0.1);
    color: var(--color-text-muted);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.interest-tag:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    transform: translateY(-1px);
}

/* --- Main Content --- */
.main-content {
    padding: var(--space-2xl) var(--space-xl);
    max-width: var(--content-max-width);
    margin-left: auto;
}

.section {
    margin-bottom: var(--space-2xl);
}

.section:last-child {
    margin-bottom: 0;
}

.section-heading {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
    position: relative;
}

.section-heading::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

/* Summary */
.summary-text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.8;
}

/* Experience */
.experience-item {
    margin-bottom: var(--space-xl);
    padding-left: var(--space-lg);
    border-left: 2px solid var(--color-border);
    position: relative;
}

.experience-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-border);
}

.experience-item:last-child {
    margin-bottom: 0;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.job-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.company-name {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    font-weight: 500;
}

.date-range {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    background: var(--color-bg-alt);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    white-space: nowrap;
    font-weight: 500;
    flex-shrink: 0;
}

.achievements {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.achievements li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tech-tag {
    background: var(--color-bg-alt);
    color: var(--color-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.tech-tag:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

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

.project-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.project-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.project-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.project-links {
    display: flex;
    gap: var(--space-md);
}

.project-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

/* Education */
.education-item {
    margin-bottom: var(--space-xl);
    padding-left: var(--space-lg);
    border-left: 2px solid var(--color-border);
    position: relative;
}

.education-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-border);
}

.education-item:last-child {
    margin-bottom: 0;
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.degree {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.school-name {
    font-size: var(--font-size-base);
    color: var(--color-accent);
    font-weight: 500;
}

.education-detail {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Certifications */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.cert-item {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition-base);
}

.cert-item:hover {
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.cert-item h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.cert-item p {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

/* --- Footer --- */
.cv-footer {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* --- Print Styles --- */
@media print {
    .cv-container {
        box-shadow: none;
        max-width: none;
        display: grid;
        grid-template-columns: var(--sidebar-width) 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .main-content {
        max-width: none;
    }

    .cv-footer {
        display: none;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    .project-link:hover,
    .tech-tag:hover,
    .interest-tag:hover,
    .skill-tag:hover,
    .cert-item:hover,
    .project-card:hover,
    .experience-item:hover {
        transform: none;
        box-shadow: none;
    }

    @page {
        margin: 0.5in;
    }
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .cv-container {
        grid-template-columns: 1fr;
        max-width: 100%;
    }

    .sidebar {
        position: static;
        height: auto;
        flex-direction: row;
        flex-wrap: wrap;
        padding: var(--space-lg);
        gap: var(--space-xl);
    }

    .profile-section {
        border-bottom: none;
        border-right: 1px solid var(--color-border-sidebar);
        padding-bottom: 0;
        padding-right: var(--space-xl);
        min-width: 200px;
        flex: 1;
    }

    .name {
        font-size: var(--font-size-xl);
    }

    .avatar {
        width: 100px;
        height: 100px;
    }

    .skills-section,
    .languages-section,
    .interests-section,
    .contact-info {
        flex: 1;
        min-width: 200px;
    }

    .main-content {
        padding: var(--space-xl) var(--space-lg);
    }
}

@media (max-width: 600px) {
    :root {
        --font-size-base: 0.9375rem;
    }

    .sidebar {
        flex-direction: column;
        padding: var(--space-lg);
    }

    .profile-section {
        border-right: none;
        border-bottom: 1px solid var(--color-border-sidebar);
        padding-right: 0;
        padding-bottom: var(--space-lg);
    }

    .experience-header,
    .education-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .date-range {
        align-self: flex-start;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

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

/* --- Animation --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeInUp var(--transition-slow) ease-out backwards;
}

.section:nth-child(1) { animation-delay: 0ms; }
.section:nth-child(2) { animation-delay: 100ms; }
.section:nth-child(3) { animation-delay: 200ms; }
.section:nth-child(4) { animation-delay: 300ms; }
.section:nth-child(5) { animation-delay: 400ms; }
.section:nth-child(6) { animation-delay: 500ms; }

/* --- Focus Styles for Accessibility --- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

/* --- High Contrast Mode --- */
@media (prefers-contrast: high) {
    :root {
        --color-border: currentColor;
        --color-border-sidebar: currentColor;
    }

    .skill-tag,
    .tech-tag,
    .interest-tag,
    .project-link,
    .cert-item,
    .project-card,
    .education-item,
    .experience-item {
        border: 2px solid currentColor;
    }
}