/* ── SWISS NEO-BRUTALIST DESIGN SYSTEM ── */
:root {
  /* Fonts */
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Fira Code', monospace;

  /* Transitions */
  --transition: 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Light Theme (Default, Swiss-inspired Cream) */
  --bg-primary: #FAF9F6;
  --bg-secondary: #F4F3EF;
  --bg-tertiary: #EAE8E2;
  
  --text-primary: #111111;
  --text-secondary: #4A4A4A;
  --text-muted: #8E8D89;
  
  --border-color: #111111;
  --border-color-muted: #D1CFCA;
  
  --accent-color: #EA580C; /* Neon orange */
  --accent-color-hover: #C2410C;
  --accent-glow: rgba(234, 88, 12, 0.15);

  --selection-bg: #EA580C;
  --selection-text: #FFFFFF;

  /* API Console Colors */
  --btn-get: #10B981;  /* Emerald */
  --btn-post: #3B82F6; /* Blue */
  --btn-put: #F59E0B;  /* Amber */
  --btn-del: #EF4444;  /* Red */
  
  --terminal-bg: #121214;
  --terminal-text: #F3F4F6;
  --terminal-border: #27272A;
}

[data-theme="dark"] {
  /* Dark Theme (Obsidian Technical) */
  --bg-primary: #0A0A0C;
  --bg-secondary: #121215;
  --bg-tertiary: #1C1C20;
  
  --text-primary: #FAF9F6;
  --text-secondary: #A3A3AC;
  --text-muted: #5C5C64;
  
  --border-color: #FAF9F6;
  --border-color-muted: #2E2E36;
  
  --accent-color: #F97316; /* Vibrant orange */
  --accent-color-hover: #FB923C;
  --accent-glow: rgba(249, 115, 22, 0.2);

  --selection-bg: #F97316;
  --selection-text: #000000;

  /* API Console Colors */
  --terminal-bg: #070708;
  --terminal-text: #F3F4F6;
  --terminal-border: #1F1F23;
}

/* ── RESET & BASE STYLES ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
}

::selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color-muted);
  border: 2px solid var(--bg-secondary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Typography Base */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

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

input, textarea, button, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 70px;
  background-color: rgba(250, 249, 246, 0.8);
  border-bottom: 1px solid var(--border-color-muted);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition), border-color var(--transition);
}

[data-theme="dark"] .site-header {
  background-color: rgba(10, 10, 12, 0.8);
}

.header-inner {
  max-width: 1300px;
  height: 100%;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--transition);
}
.logo-symbol {
  color: var(--accent-color);
  font-size: 1.1rem;
}
.logo:hover {
  color: var(--accent-color);
}

.nav-menu {
  display: flex;
  gap: 1.8rem;
}
.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
  padding: 0.2rem 0;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--border-color);
  transition: width var(--transition);
}
.nav-link:hover {
  color: var(--text-primary);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}
.nav-link.active::after {
  width: 100%;
  background-color: var(--accent-color);
}

.theme-toggle {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  border: 1px solid var(--border-color-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: var(--bg-secondary);
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
}
.theme-toggle:hover {
  border-color: var(--border-color);
  transform: rotate(15deg);
}
.theme-icon {
  font-size: 0.95rem;
  line-height: 1;
}

/* ── LAYOUT STRUCTURE ── */
.two-col {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-height: calc(100vh - 70px);
}

/* LEFT COLUMN: Sticky Hero Section */
.left-col {
  padding: 4rem 2rem;
  border-right: 1px solid var(--border-color-muted);
  transition: border-color var(--transition);
}

.left-sticky-content {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.hero-text-block {
  margin-bottom: 2rem;
}
.hero-title {
  font-size: clamp(3rem, 5vw, 4.8rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.05em;
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}
.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.hero-subtitle::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
}

/* Interactive Technical Grid Block */
.interactive-grid-container {
  position: relative;
  width: 100%;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 2.5rem 1.2rem 1.2rem 1.2rem;
  transition: border-color var(--transition), background-color var(--transition);

  /* Theme variables for Git Levels */
  --git-lvl-0: #ebedf0;
  --git-lvl-1: #ffd166;
  --git-lvl-2: #ff9f1c;
  --git-lvl-3: #ff4500;
  --git-lvl-4: #c3073f;
}

[data-theme="dark"] .interactive-grid-container {
  --git-lvl-0: #161b22;
  --git-lvl-1: #9e4a0b;
  --git-lvl-2: #d95c00;
  --git-lvl-3: #ff7b00;
  --git-lvl-4: #ff2a00;
}

/* Corner details */
.crosshair {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
  pointer-events: none;
}
.crosshair.tl { top: -4px; left: -3px; }
.crosshair.tr { top: -4px; right: -3px; }
.crosshair.bl { bottom: -7px; left: -3px; }
.crosshair.br { bottom: -7px; right: -3px; }

.grid-meta {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  pointer-events: none;
}
.grid-meta.tl { top: 6px; left: 8px; }
.grid-meta.tr { top: 6px; right: 8px; }
.grid-meta.bl { bottom: 6px; left: 8px; }
.grid-meta.br { bottom: 6px; right: 8px; }

/* The Grid cells */
.interactive-grid {
  width: 100%;
  height: auto;
  display: grid;
  grid-template-columns: repeat(24, 1fr);
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  background-color: var(--bg-secondary);
  transition: background-color var(--transition);
}

.grid-cell {
  background-color: var(--git-lvl-0);
  transition: background-color 0.3s ease, transform 0.15s ease, box-shadow 0.15s ease;
  cursor: crosshair;
  position: relative;
  border-radius: 2px;
  aspect-ratio: 1;
}

/* Commit Levels */
.grid-cell.lvl-0 { background-color: var(--git-lvl-0); }
.grid-cell.lvl-1 { background-color: var(--git-lvl-1); }
.grid-cell.lvl-2 { background-color: var(--git-lvl-2); }
.grid-cell.lvl-3 { background-color: var(--git-lvl-3); }
.grid-cell.lvl-4 { background-color: var(--git-lvl-4); }

.grid-cell:hover {
  background-color: var(--text-primary) !important;
  transform: scale(1.15);
  z-index: 5;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Contribution Legend */
.grid-legend {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
}
.legend-text {
  letter-spacing: 0.02em;
}
.legend-scale {
  display: flex;
  align-items: center;
  gap: 4px;
}
.legend-box {
  width: 8px;
  height: 8px;
  border-radius: 1px;
  display: inline-block;
}
.legend-box.lvl-0 { background-color: var(--git-lvl-0); }
.legend-box.lvl-1 { background-color: var(--git-lvl-1); }
.legend-box.lvl-2 { background-color: var(--git-lvl-2); }
.legend-box.lvl-3 { background-color: var(--git-lvl-3); }
.legend-box.lvl-4 { background-color: var(--git-lvl-4); }

/* Cursor Tooltip */
.grid-tooltip {
  position: absolute;
  background-color: #121214;
  color: #FAF9F6;
  border: 1px solid #2D2D35;
  padding: 0.4rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  border-radius: 4px;
  pointer-events: none;
  z-index: 100;
  opacity: 0;
  transform: translate(-50%, -100%) translateY(-10px);
  transition: opacity 0.12s ease, transform 0.12s ease;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}
.grid-tooltip.visible {
  opacity: 1;
  transform: translate(-50%, -100%) translateY(-6px);
}
.grid-tooltip::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 8px;
  height: 8px;
  background-color: #121214;
  border-right: 1px solid #2D2D35;
  border-bottom: 1px solid #2D2D35;
}

/* RIGHT COLUMN: Scrollable content */
.right-col {
  padding: 4rem 2rem 6rem 3rem;
}

.intro-block {
  margin-bottom: 5rem;
  min-height: calc(100vh - 280px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.intro-text {
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 2rem;
}
.scroll-down-indicator {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-muted);
  animation: bounce 2s infinite;
  align-self: flex-start;
  margin-top: 1rem;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* ── PORTFOLIO SECTIONS ── */
.portfolio-section {
  padding-top: 5rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
  transition: border-color var(--transition);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.04em;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.section-title::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background-color: var(--border-color-muted);
}

/* ── INFO SECTION ── */
.info-card-group {
  display: flex;
  flex-direction: column;
}

.info-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color-muted);
  transition: border-color var(--transition);
}
.info-row:first-child {
  border-top: 1px solid var(--border-color-muted);
}

.info-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-top: 0.2rem;
}

.info-value {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
}
.info-value strong {
  color: var(--text-primary);
}

.bio-text {
  line-height: 1.6;
  font-size: 1rem;
}

/* Skills list details */
.skills-category {
  margin-bottom: 1.5rem;
}
.skills-category:last-child {
  margin-bottom: 0;
}
.skills-cat-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--tag-text);
  background-color: var(--tag-bg);
  border: 1px solid var(--border-color-muted);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}
.skill-tag:hover {
  border-color: var(--border-color);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* ── PROJECTS SECTION ── */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-card {
  padding: 1.8rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color-muted);
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.project-card:hover {
  border-color: var(--border-color);
  background-color: var(--bg-primary);
  transform: translate(-3px, -3px);
  box-shadow: 4px 4px 0px var(--border-color);
}

/* Special treatment for featured card */
.project-card.featured {
  border-width: 1px;
  border-color: var(--border-color);
  background-color: var(--bg-secondary);
}
.project-card.featured:hover {
  background-color: var(--bg-primary);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
}

.project-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-weight: 600;
}
.featured-badge {
  background-color: var(--accent-color);
  color: #FFFFFF;
}
.ongoing-badge {
  background-color: var(--btn-post);
  color: #FFFFFF;
}

.project-desc {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  gap: 1rem;
}
.project-stack {
  line-height: 1.4;
  word-break: break-word;
}

.project-link {
  color: var(--accent-color);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex-shrink: 0;
  transition: color var(--transition);
}
.project-link span {
  display: inline-block;
  transition: transform var(--transition);
}
.project-link:hover {
  color: var(--accent-color-hover);
}
.project-link:hover span {
  transform: translate(2px, -2px);
}

/* ── PROJECT KNOWLEDGE GRAPH & COLLAPSIBLE CODE INDEX SECTION ── */
.library-intro {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.library-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.library-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.library-categories {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lib-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color-muted);
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition);
}

.lib-tab:hover {
  border-color: var(--border-color);
  color: var(--text-primary);
}

.lib-tab.active {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
  font-weight: 600;
}

.library-search-wrapper {
  flex-grow: 1;
  max-width: 320px;
}

.lib-search-input {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color-muted);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.45rem 0.8rem;
  border-radius: 4px;
  outline: none;
  transition: border-color var(--transition);
}

.lib-search-input:focus {
  border-color: var(--accent-color);
}

/* ── 3D ALGORITHM SORTING VISUALIZER SECTION ── */
.sorting-container {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.sorting-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.sorting-controls-left, .sorting-controls-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.sorting-select {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color-muted);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.45rem 0.8rem;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.sorting-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color-muted);
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition);
}

.sorting-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.sorting-btn.primary-btn {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

.sorting-btn.primary-btn:hover {
  background-color: var(--accent-hover);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sorting-slider {
  accent-color: var(--accent-color);
  width: 90px;
  cursor: pointer;
}

.sorting-canvas-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.sorting-3d-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.sorting-hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
}

.hud-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.8rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.hud-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hud-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.hud-value.blue { color: #60A5FA; }
.hud-value.red { color: #EF4444; }
.hud-value.green { color: #10B981; }

.terminal-body {
  padding: 1.2rem;
}

.terminal-status-row {
  font-size: 0.72rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

.status-code {
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}
.status-code.idle { background-color: rgba(255, 255, 255, 0.05); color: var(--text-muted); }
.status-code.success { background-color: rgba(16, 185, 129, 0.15); color: #10B981; }
.status-code.error { background-color: rgba(239, 68, 68, 0.15); color: #EF4444; }

/* Tress Playground Docs & Drawer */
.playground-docs-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-left: 0.8rem;
}

.tress-docs-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  border: 1px solid var(--border-color-muted);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  line-height: 1;
  cursor: pointer;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  margin: 0 0.4rem;
  transition: all var(--transition);
}

.tress-docs-btn:hover {
  border-color: var(--accent-color);
  color: var(--text-primary);
}

.tress-docs-btn.active {
  background-color: var(--accent-color);
  color: #ffffff;
  border-color: var(--accent-color);
}

.tress-docs-drawer {
  padding: 1.2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  transition: all var(--transition);
}

.tress-docs-drawer[hidden] {
  display: none !important;
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.docs-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color-muted);
  border-radius: 6px;
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.docs-card-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.docs-syntax {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--accent-color);
}

.docs-desc {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.docs-code-example {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  padding: 0.5rem;
  color: var(--text-primary);
  margin: 0;
  white-space: pre-wrap;
}

/* ── CONTACT SECTION ── */
.contact-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.contact-links-list {
  display: flex;
  flex-direction: column;
}

.contact-item-link {
  display: flex;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color-muted);
  transition: border-color var(--transition);
}
.contact-item-link:first-child {
  border-top: 1px solid var(--border-color-muted);
}

.contact-method {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 8rem;
  flex-shrink: 0;
}

.contact-address {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition);
}

.contact-arrow {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-muted);
  transform: translateX(-4px);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition), color var(--transition);
}

.contact-item-link:hover .contact-address {
  color: var(--accent-color);
}
.contact-item-link:hover .contact-arrow {
  transform: translateX(0);
  opacity: 1;
  color: var(--accent-color);
}

/* ── SITE FOOTER ── */
.site-footer {
  margin-top: 6rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: border-color var(--transition);
}

/* ── TRESS PLAYGROUND SECTION ── */
.playground-intro {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.playground-box {
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  transition: border-color var(--transition), background-color var(--transition);
  margin-bottom: 2.5rem;
}

/* Header bar */
.playground-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  transition: border-color var(--transition), background-color var(--transition);
}

.picker-group {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.playground-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.playground-select {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition), background-color var(--transition);
}
.playground-select:focus {
  border-color: var(--border-color);
}

.lang-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-color);
  letter-spacing: 0.05em;
  background-color: var(--tag-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  border: 1px solid var(--border-color-muted);
}

/* Editor layout */
.playground-editor-layout {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition);
}

.editor-pane {
  display: flex;
  background-color: var(--bg-primary);
  min-height: 360px;
}

.editor-numbers {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 1.5rem 0.8rem;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color-muted);
  color: var(--text-muted);
  font-family: var(--font-mono), monospace !important;
  font-size: 0.85rem;
  line-height: 1.6;
  user-select: none;
  text-align: right;
  min-width: 2.5rem;
}

.playground-textarea {
  flex-grow: 1;
  border: none;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-mono), monospace !important;
  font-size: 0.85rem;
  line-height: 1.6;
  padding: 1.5rem;
  resize: vertical;
  outline: none;
  tab-size: 4;
}

.playground-run-button {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 1.2rem;
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: none;
  border-top: 1px solid var(--border-color);
  letter-spacing: 0.05em;
}
.playground-run-button:hover {
  background-color: var(--accent-color);
  color: #FFFFFF;
}

/* Output terminal */
.playground-terminal-block {
  background-color: var(--terminal-bg);
  color: var(--terminal-text);
  font-family: var(--font-mono);
  transition: background-color var(--transition);
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1.2rem;
  background-color: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.terminal-title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.terminal-copy-btn {
  background: transparent;
  border: 1px solid var(--border-color-muted);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--transition);
}

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

#playground .terminal-output-viewport {
  max-height: 350px;
  font-size: 0.85rem;
  font-family: var(--font-mono), monospace !important;
  line-height: 1.6;
}

/* ── RESPONSIVE DESIGN (MEDIA QUERIES) ── */
@media (max-width: 1024px) {
  .two-col {
    grid-template-columns: 1fr;
  }
  
  .left-col {
    border-right: none;
    border-bottom: 1px solid var(--border-color-muted);
    padding: 3rem 2rem;
  }
  
  .left-sticky-content {
    position: static;
    height: auto;
    min-height: auto;
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 8vw, 3.8rem);
  }
  
  .interactive-grid-container {
    max-width: 600px;
    margin: 2rem 0 0 0;
  }
  
  .right-col {
    padding: 3rem 2rem;
  }
  
  .intro-block {
    min-height: auto;
    margin-bottom: 4rem;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0 1rem;
  }
  .nav-menu {
    display: none; /* Let navigation collapse on mobile, or keep compact. Let's hide links to keep header clean and just use scrolling */
  }
  
  .logo {
    font-size: 0.85rem;
  }
  
  .left-col, .right-col {
    padding: 2.5rem 1rem;
  }
  
  .info-row {
    grid-template-columns: 1fr;
    gap: 0.4rem;
    padding: 1rem 0;
  }
  
  .info-label {
    font-size: 0.7rem;
  }
  
  .api-dashboard-layout {
    grid-template-columns: 1fr;
  }
  
  .api-endpoints-column {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .project-card {
    padding: 1.2rem;
  }
  
  .project-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
  
  .contact-method {
    width: 6rem;
  }
  .contact-address {
    font-size: 0.9rem;
  }
}

/* Logo SVGs */
.logo-symbol-svg {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
  margin-top: -3px;
  color: var(--accent-color);
  transition: color var(--transition);
}

.hero-logo-dot-svg {
  width: 0.8em;
  height: 0.8em;
  display: inline-block;
  vertical-align: middle;
  margin-left: 0.2rem;
  color: var(--accent-color);
  transition: color var(--transition);
}

/* ── RESUME SECTION STYLING ── */
.resume-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.resume-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 4px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
}

.resume-btn.primary-btn {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--border-color);
}
.resume-btn.primary-btn:hover {
  background-color: var(--accent-color);
  color: #FFFFFF;
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.resume-btn.secondary-btn {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color-muted);
}
.resume-btn.secondary-btn:hover {
  border-color: var(--border-color);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.resume-content-layout {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.resume-block {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.resume-block-title {
  font-size: 1.4rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color-muted);
  color: var(--text-primary);
}

.resume-list {
  padding-left: 1.2rem;
}
.resume-list li {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

/* Timeline */
.experience-timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-left: 2px solid var(--border-color-muted);
  padding-left: 1.5rem;
  margin-left: 0.5rem;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.95rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 2px solid var(--accent-color);
  transition: background-color var(--transition);
}

.timeline-item:hover::before {
  background-color: var(--accent-color);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.role-company {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-separator {
  color: var(--accent-color);
  font-weight: bold;
}

.timeline-company {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color-muted);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

.timeline-location {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.timeline-details {
  padding-left: 1.2rem;
}
.timeline-details li {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

/* Resume Grid Columns */
.resume-grid-two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
}

/* Education List */
.education-list {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.education-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.edu-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.edu-degree {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.edu-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color-muted);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.edu-school {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.edu-details {
  padding-left: 1.2rem;
  margin-top: 0.3rem;
}
.edu-details li {
  font-size: 0.88rem;
  line-height: 1.4;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

/* Certifications List */
.certifications-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cert-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cert-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.cert-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cert-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color-muted);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.cert-detail {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* Responsive adjustment for resume-grid-two-col */
@media (max-width: 768px) {
  .resume-grid-two-col {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}