/* ========================================
   Portfolio – System/Terminal Theme
   VS Code-inspired developer interface
   ======================================== */

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

/* ---------- CSS Variables – Vesper Theme ---------- */
:root {
  /* Vesper Color Palette */
  --bg-primary: #101010;
  --bg-secondary: #101010;
  --bg-tertiary: #161616;
  --bg-hover: #1c1c1c;
  --border-default: #282828;
  --border-muted: #1c1c1c;
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --text-muted: #909090;
  --accent-peach: #ffc799;
  --accent-peach-dim: rgba(255, 199, 153, 0.15);
  --accent-mint: #99ffe4;
  --accent-mint-dim: rgba(153, 255, 228, 0.15);
  --accent-red: #ff8080;
  
  /* Semantic Mapping */
  --color-brand-bg: var(--bg-primary);
  --color-surface: var(--bg-secondary);
  --color-surface-hover: var(--bg-tertiary);
  --color-text-primary: var(--text-primary);
  --color-text-secondary: var(--text-secondary);
  --color-text-muted: var(--text-muted);
  --color-accent: var(--accent-peach);
  --color-accent-dim: var(--accent-peach-dim);
  --color-border: var(--border-default);
  --color-border-muted: var(--border-muted);
  
  /* Typography – Monospace for UI, System for Content */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
  --font-content: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  /* Type Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.875rem;
  --text-lg: 1rem;
  --text-xl: 1.125rem;
  --text-2xl: 1.25rem;
  --text-3xl: 1.5rem;
  --text-4xl: 2rem;
  --text-5xl: 2.5rem;
  --text-6xl: 3rem;
  
  /* Layout */
  --sidebar-width: 280px;
  --status-bar-height: 28px;
  --breadcrumb-height: 40px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
}

/* ---------- Font Faces ---------- */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('https://cdn.jsdelivr.net/gh/JetBrains/JetBrainsMono/web/woff2/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('https://cdn.jsdelivr.net/gh/JetBrains/JetBrainsMono/web/woff2/JetBrainsMono-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Base Styles ---------- */
html {
  scroll-behavior: smooth;
}

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

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

a:hover {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

img, video {
  display: block;
  max-width: 100%;
}

/* Project Images - constrain aspect ratio */
.project-cover {
  width: 100%;
  height: auto;
  max-height: 70vh;
  object-fit: contain;
  border: 1px solid var(--color-border);
}

/* ---------- Layout ---------- */
.site-wrapper {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr var(--status-bar-height);
  grid-template-areas: 
    "sidebar main"
    "status status";
  min-height: 100vh;
  background-color: var(--color-brand-bg);
}

.main-content {
  grid-area: main;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  height: calc(100vh - var(--status-bar-height));
}

.page-content {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
}

/* Mobile Layout */
@media (max-width: 768px) {
  .site-wrapper {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "main"
      "status";
  }
  
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: var(--status-bar-height);
    width: var(--sidebar-width);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: 100;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .page-content {
    padding: 1rem;
  }
}

/* ---------- Mobile Menu Button ---------- */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 101;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 0.5rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
  border-color: var(--accent-peach);
  color: var(--accent-peach);
}

/* ---------- Sidebar – File Tree ---------- */
.sidebar {
  grid-area: sidebar;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.explorer-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.file-tree {
  padding: 0.5rem 0;
  font-size: var(--text-sm);
}

/* Folder Styles */
.folder {
  user-select: none;
}

.folder-header,
.file {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  cursor: pointer;
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
  text-decoration: none;
}

.folder-header:hover,
.file:hover {
  background-color: var(--bg-hover);
}

.file.active {
  background-color: var(--accent-mint-dim);
  color: var(--accent-mint);
}

.folder-toggle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  width: 16px;
  text-align: center;
  font-family: var(--font-mono);
}

/* File Styles */
.file {
  padding-left: 2rem;
}

.file-prefix {
  color: var(--color-text-muted);
  margin-right: 0.5rem;
  font-family: var(--font-mono);
}

/* Collapsible Folder Contents */
.folder-contents {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.folder.open > .folder-contents {
  max-height: 1000px;
}

/* Indentation Guide */
.folder-contents {
  position: relative;
}

.folder-contents::before {
  content: '';
  position: absolute;
  left: 1.25rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: var(--color-border-muted);
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.crumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

a.crumb {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.crumb-separator {
  color: var(--color-text-muted);
  margin: 0 0.25rem;
}

.crumb.active {
  color: var(--color-text-primary);
  font-weight: 600;
}

a.crumb.active {
  color: var(--color-text-primary);
}

/* ---------- Status Bar ---------- */
.status-bar {
  grid-area: status;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  height: var(--status-bar-height);
}

.status-mode {
  background-color: var(--accent-peach);
  color: var(--bg-primary);
  padding: 0 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  height: 100%;
  display: flex;
  align-items: center;
  transition: background-color 0.2s ease;
}

.status-mode.insert {
  background-color: var(--accent-mint);
}

.status-separator {
  color: var(--color-border);
  margin: 0 0.25rem;
}

.status-left,
.status-right {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 0.5rem;
}

.status-item {
  display: flex;
  align-items: center;
  padding: 0 0.25rem;
}

/* ---------- Command Palette (Terminal Style) ---------- */
.command-palette-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: flex-start;
  padding-top: 20vh;
  z-index: 1000;
}

.command-palette-overlay.active {
  display: flex;
}

.command-palette {
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.command-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.command-input-wrapper::before {
  content: ':';
  color: var(--accent-peach);
  font-weight: 700;
  font-size: var(--text-lg);
}

.command-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  outline: none;
}

.command-input::placeholder {
  color: var(--color-text-muted);
}

.command-list {
  max-height: 400px;
  overflow-y: auto;
}

.command-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-base);
}

.command-item:hover,
.command-item.selected {
  background-color: var(--bg-hover);
  color: var(--color-text-primary);
}

.command-item.selected {
  background-color: var(--accent-mint-dim);
}

.command-key {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background-color: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
}

.command-empty {
  padding: 2rem;
  text-align: center;
  color: var(--color-text-muted);
}

/* ---------- Terminal Prompt ---------- */
.terminal-prompt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  margin-bottom: 2rem;
  opacity: 0.8;
}

.prompt-user {
  color: var(--accent-peach);
}

.prompt-at {
  color: var(--text-muted);
}

.prompt-host {
  color: var(--accent-mint);
}

.prompt-separator,
.prompt-symbol {
  color: var(--text-primary);
}

.prompt-path {
  color: var(--accent-peach);
}

.prompt-command {
  color: var(--text-secondary);
}

/* ---------- Hero – README Style ---------- */
.hero {
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-header {
  margin-bottom: 2rem;
}

.hero-title {
  font-size: var(--text-6xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--accent-peach);
  font-weight: 600;
}

.hero-description {
  font-family: var(--font-content);
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.75;
}

.hero-meta {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.meta-value {
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  font-weight: 700;
}

/* ---------- Section Styles ---------- */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-child {
  border-bottom: none;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
}

.section-heading::before {
  content: '# ';
  color: var(--text-muted);
}

/* ---------- Project List – File Style ---------- */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.project-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.project-item:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--accent-mint);
  text-decoration: none;
}

.project-prefix {
  color: var(--accent-peach);
  font-family: var(--font-mono);
  font-weight: 600;
  margin-right: 0.75rem;
}

.project-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

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

.project-meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  opacity: 0.9;
}

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

.btn-icon {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 0.375rem 0.75rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  border-color: var(--accent-peach);
  color: var(--accent-peach);
  background-color: var(--accent-peach-dim);
}

/* ---------- Experience Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  background-color: var(--bg-primary);
  border: 2px solid var(--accent-peach);
  transform: translateX(calc(-50% + 1px));
}

.timeline-date {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--accent-peach);
  background-color: var(--accent-peach-dim);
  padding: 0.25rem 0.5rem;
  margin-bottom: 0.5rem;
}

.timeline-role {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.timeline-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background-color: var(--bg-tertiary);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--color-border);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background-color: var(--bg-tertiary);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
  background-color: var(--bg-hover);
  border-color: var(--accent-mint);
}

.btn-primary {
  background-color: var(--accent-peach);
  color: var(--bg-primary);
  border-color: var(--accent-peach);
}

.btn-primary:hover {
  background-color: var(--color-text-primary);
  border-color: var(--color-text-primary);
  color: var(--bg-primary);
}

/* ---------- Footer ---------- */
.cta-section {
  padding: 3rem 0;
  text-align: center;
}

.cta-heading {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta-text {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.email-link {
  display: inline-block;
  font-size: var(--text-lg);
  color: var(--accent-peach);
  border: 1px solid var(--accent-peach);
  padding: 0.75rem 1.5rem;
  transition: all var(--transition-fast);
}

.email-link:hover {
  background-color: var(--accent-peach);
  color: var(--bg-primary);
  text-decoration: none;
}

/* ---------- Utilities ---------- */
.hidden {
  display: none !important;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-accent {
  color: var(--accent-peach);
}

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }

/* Content text - system-ui for readability */
.content-text {
  font-family: var(--font-content);
  line-height: 1.75;
  font-size: 0.9375rem;
  max-width: 680px;
}

.content-text p {
  margin-bottom: 1.25rem;
}

.content-text p:last-child {
  margin-bottom: 0;
}

/* ---------- Scrollbar Styling ---------- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border);
}

/* ---------- Selection ---------- */
::selection {
  background-color: var(--accent-mint-dim);
  color: var(--accent-mint);
}

/* ---------- Focus Styles ---------- */
:focus-visible {
  outline: 2px solid var(--accent-mint);
  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;
  }
}

/* ---------- Print Styles ---------- */
@media print {
  .sidebar,
  .status-bar,
  .mobile-menu-btn,
  .command-palette-overlay {
    display: none !important;
  }
  
  .site-wrapper {
    display: block;
  }
  
  .main-content {
    height: auto;
    overflow: visible;
  }
}