/* ========================================
   CV - Modern Professional Stylesheet
   ======================================== */

:root {
  /* Color Palette */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-secondary: #0f172a;
  --color-accent: #0ea5e9;

  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-sidebar-bg: #0f172a;
  --color-sidebar-text: #f1f5f9;
  --color-sidebar-muted: #94a3b8;

  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Skill Levels */
  --skill-expert: #10b981;
  --skill-advanced: #3b82f6;
  --skill-intermediate: #f59e0b;
  --skill-basic: #ef4444;

  /* Language Bars */
  --lang-native: #10b981;
  --lang-fluent: #3b82f6;
  --lang-basic: #f59e0b;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.7rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-lg: 1.0625rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* 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;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --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: 300px;
  --header-height: auto;
  --content-max-width: 800px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --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: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* Print Styles */
@media print {
  .no-print { display: none !important; }
  .cv-container { display: block !important; }
  .sidebar { position: static !important; width: 100% !important; }
  body { background: white !important; }
  .main-content { padding: 0 !important; }
  .section { break-inside: avoid; }
  a { text-decoration: none !important; color: inherit !important; }
}

/* ========================================
   Layout
   ======================================== */

.cv-container {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  background: var(--color-bg);
}

/* Sidebar */
.sidebar {
  background: var(--color-sidebar-bg);
  color: var(--color-sidebar-text);
  padding: var(--space-8) var(--space-6);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.section-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.section-title i {
  font-size: var(--font-size-base);
}

/* Profile Section */
.profile-section {
  text-align: center;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.avatar-wrapper {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-4);
}

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

.avatar:hover {
  transform: scale(1.02);
}

.avatar-upload-btn {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 3px solid var(--color-sidebar-bg);
  transition: var(--transition-fast);
  font-size: var(--font-size-sm);
}

.avatar-upload-btn:hover {
  background: var(--color-primary-dark);
  transform: scale(1.1);
}

.name {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-1);
  color: var(--color-sidebar-text);
}

.title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: left;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-sidebar-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  padding: var(--space-2) 0;
}

.contact-item:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

.contact-item i {
  width: 18px;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

.contact-item span[contenteditable="true"]:focus {
  outline: none;
  background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-sm);
  padding: 0 var(--space-1);
}

/* About Text */
.about-text {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-sidebar-muted);
}

.about-text[contenteditable="true"]:focus {
  outline: none;
  background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
}

/* Skills */
.skills-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.skill-category h3 {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-sidebar-muted);
  margin-bottom: var(--space-2);
}

.skill-category ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.skill-category li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.skill-category li:hover {
  background: rgba(37, 99, 235, 0.1);
}

.skill-name {
  font-weight: var(--font-weight-medium);
}

.skill-level {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.skill-level.expert { background: rgba(16, 185, 129, 0.2); color: var(--skill-expert); }
.skill-level.advanced { background: rgba(59, 130, 246, 0.2); color: var(--skill-advanced); }
.skill-level.intermediate { background: rgba(245, 158, 11, 0.2); color: var(--skill-intermediate); }
.skill-level.basic { background: rgba(239, 68, 68, 0.2); color: var(--skill-basic); }

/* Languages */
.languages {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

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

.lang-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.lang-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.lang-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

.lang-fill.native { background: var(--lang-native); width: 100%; }
.lang-fill.fluent { background: var(--lang-fluent); width: 85%; }
.lang-fill.basic { background: var(--lang-basic); width: 40%; }

.lang-level {
  font-size: var(--font-size-xs);
  color: var(--color-sidebar-muted);
}

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

.certifications li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
  transition: var(--transition-fast);
}

.certifications li:hover {
  background: rgba(37, 99, 235, 0.1);
  transform: translateX(4px);
}

.certifications strong {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
}

.cert-date {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  background: rgba(37, 99, 235, 0.15);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

/* Main Content */
.main-content {
  padding: var(--space-10) var(--space-12);
  max-width: var(--content-max-width);
  margin-left: auto;
}

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

.main-content .section-title {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-2);
}

.main-content .section-title i {
  color: var(--color-primary);
}

/* ========================================
   Experience
   ======================================== */

.experience-item {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

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

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.exp-meta {
  flex: 1;
  min-width: 200px;
}

.exp-role {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

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

.exp-date {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.exp-location {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

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

.exp-details li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

.exp-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.7;
}

.exp-details[contenteditable="true"] li:focus {
  outline: none;
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  margin: calc(-1 * var(--space-2));
  padding: var(--space-2) var(--space-3);
}

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

.tech-tag {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ========================================
   Projects
   ======================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.project-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: var(--transition-normal);
}

.project-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.project-header h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  flex: 1;
}

.project-link {
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
}

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

.project-desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.project-tech span {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.project-highlights li {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  position: relative;
  padding-left: var(--space-4);
}

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

/* ========================================
   Education
   ======================================== */

.education-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

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

.edu-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.edu-content {
  flex: 1;
}

.edu-content h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.edu-school {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.edu-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.edu-gpa {
  color: var(--color-success) !important;
  font-weight: var(--font-weight-semibold);
}

.edu-detail {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

/* ========================================
   Activities
   ======================================== */

.activities {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

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

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

.activity-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.activity-content {
  flex: 1;
}

.activity-content h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.activity-content p {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.activity-date {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

/* ========================================
   Contenteditable Styles
   ======================================== */

[contenteditable="true"] {
  transition: var(--transition-fast);
}

[contenteditable="true"]:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

[contenteditable="true"]:empty::before {
  content: attr(data-placeholder);
  color: var(--color-text-light);
  pointer-events: none;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
  .cv-container {
    grid-template-columns: 280px 1fr;
  }

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

  .main-content {
    padding: var(--space-8) var(--space-8);
  }
}

@media (max-width: 768px) {
  .cv-container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    min-height: auto;
    padding: var(--space-6);
    border-radius: 0;
  }

  .main-content {
    padding: var(--space-6);
    max-width: 100%;
  }

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

  .exp-date {
    align-items: flex-start;
  }

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

  .activity-item {
    flex-direction: column;
    text-align: center;
  }

  .activity-icon {
    margin: 0 auto;
  }

  .education-item {
    flex-direction: column;
    text-align: center;
  }

  .edu-icon {
    margin: 0 auto;
  }

  .edu-meta {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-base: 0.875rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.125rem;
    --font-size-2xl: 1.375rem;
  }

  .sidebar {
    padding: var(--space-4);
  }

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

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

  .section-title {
    font-size: var(--font-size-xs);
  }
}

/* ========================================
   Animation
   ======================================== */

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

.cv-container > * {
  animation: fadeInUp 0.6s ease forwards;
}

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

/* ========================================
   Utility Classes
   ======================================== */

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }