/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-primary-bg: #eff6ff;
    --color-text: #1e293b;
    --color-text-light: #475569;
    --color-text-muted: #94a3b8;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e1;
    --color-sidebar-bg: #0f172a;
    --color-sidebar-text: #f1f5f9;
    --color-sidebar-text-muted: #94a3b8;
    --color-sidebar-border: #1e293b;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;

    /* Layout */
    --sidebar-width: 320px;
    --container-max-width: 1000px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

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

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #f1f5f9;
        --color-text-light: #cbd5e1;
        --color-text-muted: #64748b;
        --color-bg: #0f172a;
        --color-bg-alt: #1e293b;
        --color-border: #334155;
        --color-border-dark: #475569;
        --color-primary-bg: #1e3a5f;
    }
}

/* Reset */
*, *::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;
}

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

/* ===================================
   Sidebar
   =================================== */
.sidebar {
    background: var(--color-sidebar-bg);
    color: var(--color-sidebar-text);
    padding: var(--space-xl) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    border-right: 1px solid var(--color-sidebar-border);
}

.profile-section {
    text-align: center;
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-sidebar-border);
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    background: var(--color-primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--color-primary);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.avatar-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: var(--space-xs);
}

.title {
    font-size: var(--font-size-base);
    color: var(--color-primary-light);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Contact Info */
.contact-info h3,
.skills-section h3,
.languages-section h3 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-primary-light);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--color-sidebar-border);
}

.contact-info ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-sidebar-text-muted);
    line-height: 1.5;
}

.contact-info .icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-primary-light);
}

.contact-info a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-info a:hover {
    color: var(--color-sidebar-text);
    text-decoration: underline;
}

/* Skills */
.skills-section {
    flex: 1;
    overflow-y: auto;
}

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

.skill-category h4 {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-sidebar-text-muted);
    margin-bottom: var(--space-sm);
}

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

.skill-tag {
    background: var(--color-primary-bg);
    color: var(--color-primary-light);
    padding: 4px 10px;
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
}

/* Languages */
.languages {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

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

.lang-name {
    color: var(--color-sidebar-text);
}

.lang-level {
    color: var(--color-sidebar-text-muted);
    font-size: var(--font-size-xs);
    background: var(--color-sidebar-border);
    padding: 2px 8px;
    border-radius: var(--border-radius);
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    padding: var(--space-2xl) var(--space-xl);
    overflow-y: auto;
}

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

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

.section-title {
    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;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Objective */
.objective {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--color-text-light);
    text-align: justify;
}

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

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

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

.date-location {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-xs);
    text-align: right;
    min-width: 160px;
}

.date {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light);
    white-space: nowrap;
}

.location {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.job-description {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

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

.job-description li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

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

.tech-stack span {
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    padding: 4px 10px;
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--color-border);
}

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

.project-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

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

.project-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.project-link {
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-xs);
    border-radius: var(--border-radius);
    transition: color 0.2s ease, background 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.project-link svg {
    width: 20px;
    height: 20px;
}

.project-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

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

.project-tech span {
    background: var(--color-bg);
    color: var(--color-text-light);
    padding: 3px 8px;
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--color-border);
}

/* Education */
.education-item {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
    border-left: 3px solid var(--color-primary);
}

.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-xs);
    flex-wrap: wrap;
}

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

.school {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
}

.education-header .date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
    white-space: nowrap;
}

.education-detail {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Achievements */
.achievements {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.achievements li {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    padding-left: var(--space-lg);
    position: relative;
}

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

.achievements strong {
    color: var(--color-text);
}

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

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

    .sidebar {
        background: var(--color-sidebar-bg) !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

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

    .section {
        page-break-inside: avoid;
        margin-bottom: var(--space-lg);
    }

    .experience-item,
    .project-card,
    .education-item {
        page-break-inside: avoid;
    }

    .project-card:hover {
        transform: none;
        box-shadow: none;
    }

    .project-link,
    .contact-info a {
        text-decoration: none;
        color: inherit;
    }

    .footer {
        display: none;
    }

    body {
        background: white;
    }

    @page {
        margin: 15mm;
        size: A4;
    }
}

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

    .sidebar {
        border-right: none;
        border-bottom: 1px solid var(--color-sidebar-border);
        flex-direction: row;
        flex-wrap: wrap;
        padding: var(--space-lg);
        gap: var(--space-xl);
    }

    .profile-section {
        border-bottom: none;
        padding-bottom: 0;
        flex: 1;
        min-width: 200px;
        text-align: left;
    }

    .avatar-placeholder {
        margin: 0 0 var(--space-sm) 0;
    }

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

    .skills-section {
        order: 3;
        flex-basis: 100%;
    }

    .skill-category {
        margin-bottom: var(--space-md);
    }

    .date-location {
        align-items: flex-start;
        text-align: left;
    }
}

@media (max-width: 600px) {
    :root {
        --space-xl: 24px;
        --space-2xl: 32px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
        --font-size-lg: 16px;
    }

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

    .sidebar {
        flex-direction: column;
    }

    .profile-section,
    .contact-info,
    .skills-section,
    .languages-section {
        min-width: 100%;
    }

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

    .date-location {
        align-items: flex-start;
        text-align: left;
        min-width: auto;
    }

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

/* ===================================
   Accessibility
   =================================== */
@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;
    }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.skill-tag:focus-visible,
.project-link:focus-visible,
.contact-info a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000;
        --color-text: #000;
        --color-text-light: #333;
        --color-primary: #0000ee;
    }

    .skill-tag,
    .tech-stack span,
    .project-tech span {
        border: 2px solid currentColor;
    }
}