/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
  /* Colors - Professional color palette */
  --color-primary: #1e3a5f;
  --color-primary-light: #2d4a7c;
  --color-primary-dark: #152a45;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-light: #dbeafe;
  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-sidebar: #1e3a5f;
  --color-bg-sidebar-light: #2d4a7c;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-white: #ffffff;
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;

  /* 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;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* 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);

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

  /* Layout */
  --sidebar-width: 280px;
  --content-max-width: 800px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

/* ========================================
   Layout
   ======================================== */
.cv-container {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  max-width: calc(var(--sidebar-width) + var(--content-max-width) + 4rem);
  margin: 0 auto;
  box-shadow: var(--shadow-xl);
}

/* ========================================
   Sidebar
   ======================================== */
.sidebar {
  background: linear-gradient(180deg, var(--color-bg-sidebar) 0%, var(--color-bg-sidebar-light) 100%);
  color: var(--color-white);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  position: relative;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 36v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 6V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.sidebar > * {
  position: relative;
  z-index: 1;
}

/* Profile Section */
.profile-section {
  text-align: center;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.profile-image {
  margin-bottom: var(--space-4);
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.avatar:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
}

.name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-1);
  letter-spacing: -0.02em;
}

.title {
  font-size: var(--font-size-base);
  font-weight: 400;
  opacity: 0.85;
  color: var(--color-accent-light);
}

/* Section Title in Sidebar */
.section-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
  margin-bottom: var(--space-4);
  color: var(--color-accent-light);
}

/* Contact Section */
.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  transition: opacity var(--transition-fast);
}

.contact-item:hover {
  opacity: 0.8;
}

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

.contact-link {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 400;
  transition: color var(--transition-fast);
  word-break: break-word;
}

.contact-link:hover {
  color: var(--color-accent-light);
}

/* Skills Section */
.skills-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.skill-category-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
  opacity: 0.9;
}

.skills-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.skill-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.skill-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--color-accent-light);
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

/* Tools Grid */
.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tool-tag {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tool-tag:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Languages */
.languages-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.language-name {
  font-weight: 500;
}

.language-level {
  font-size: var(--font-size-xs);
  opacity: 0.7;
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

/* Interests */
.interests-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.interest-tag {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
  padding: var(--space-8) var(--space-10);
  background: var(--color-bg);
}

.section {
  margin-bottom: var(--space-10);
}

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

.section-heading {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
  letter-spacing: -0.01em;
}

/* Objective */
.objective-text {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

/* Experience */
.experience-item {
  margin-bottom: var(--space-8);
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-border);
  position: relative;
}

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

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

.experience-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .experience-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.experience-info {
  flex: 1;
}

.job-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

.company-name {
  font-size: var(--font-size-base);
  color: var(--color-accent);
  font-weight: 500;
  margin-top: var(--space-1);
}

.experience-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: var(--space-2);
}

@media (min-width: 640px) {
  .experience-meta {
    flex-direction: row;
    margin-top: 0;
  }
}

.date-range {
  font-weight: 500;
}

.location {
  opacity: 0.8;
}

.achievements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.achievements li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  position: relative;
  padding-left: var(--space-4);
}

.achievements li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* Education */
.education-item {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-border);
  position: relative;
}

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

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

.education-info {
  margin-bottom: var(--space-2);
}

.degree {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

.institution {
  font-size: var(--font-size-base);
  color: var(--color-success);
  font-weight: 500;
  margin-top: var(--space-1);
}

.education-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.education-details {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Projects */
.project-item {
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.project-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.project-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

@media (min-width: 640px) {
  .project-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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

.project-links {
  display: flex;
  gap: var(--space-3);
}

.project-link {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.project-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.project-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-3);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Certificates */
.certificates-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.certificate-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.certificate-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .certificate-item {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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

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

/* Activities */
.activities-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.activity-item {
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.activity-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.activity-info {
  margin-bottom: var(--space-2);
}

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

.activity-org {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 500;
  margin-top: var(--space-1);
}

.activity-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.activity-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Footer */
.cv-footer {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .cv-container {
    display: block;
    max-width: none;
    box-shadow: none;
  }

  .sidebar {
    display: none;
  }

  .main-content {
    padding: 0;
  }

  .section {
    page-break-inside: avoid;
    margin-bottom: var(--space-6);
  }

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

  .cv-footer {
    display: none;
  }

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

  .project-link:hover {
    text-decoration: none;
  }
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
  .cv-container {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .sidebar {
    padding: var(--space-6) var(--space-4);
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
  }

  .profile-section {
    flex: 1;
    min-width: 200px;
    border-bottom: none;
    border-right: 1px solid rgba(255, 255, 255, 0.15);
    padding-bottom: 0;
    padding-right: var(--space-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .skills-section {
    flex: 1;
    min-width: 250px;
  }

  .contact-section,
  .interests-section {
    min-width: 200px;
  }

  .main-content {
    padding: var(--space-6) var(--space-4);
  }
}

@media (max-width: 640px) {
  :root {
    --space-8: 1.5rem;
    --space-10: 2rem;
  }

  .sidebar {
    flex-direction: column;
  }

  .profile-section {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding-right: 0;
    padding-bottom: var(--space-6);
  }

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

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

  .section-heading {
    font-size: var(--font-size-lg);
  }

  .experience-header,
  .project-header {
    flex-direction: column;
  }

  .experience-meta {
    text-align: left;
  }

  .certificate-item {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

@media (prefers-contrast: high) {
  :root {
    --color-border: #000;
    --color-text-muted: #333;
  }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background: var(--color-accent-light);
  color: var(--color-primary);
}