:root {
  --white: #ffffff;
  --black: #000000;

  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e0e0e0;
  --neutral-300: #cccccc;
  --neutral-600: #666666;
  --neutral-700: #555555;
  --neutral-800: #1a1a1a;
  --neutral-900: #0a0a0a;
  --neutral-950: #0f0f0f;

  --dark-surface: #141414;
  --dark-sidebar: #111111;
  --dark-border: #2a2a2a;
  --dark-border-strong: #444444;

  --accent-green: #4ade80;
  --accent-blue: #60a5fa;
  --accent-purple: #c084fc;

  --bg: var(--neutral-50);
  --bg-surface: var(--white);
  --fg: var(--neutral-800);
  --fg-secondary: var(--neutral-600);
  --fg-muted: var(--neutral-300);
  --accent: var(--neutral-800);

  --border: var(--neutral-200);
  --border-strong: var(--neutral-300);

  --sidebar-bg: var(--neutral-100);
  --sidebar-fg: var(--neutral-800);
  --sidebar-fg-secondary: var(--neutral-600);

  --terminal-bg: var(--neutral-800);
  --terminal-fg: var(--neutral-200);
  --terminal-green: var(--accent-green);
  --terminal-blue: var(--accent-blue);
  --terminal-purple: var(--accent-purple);

  --tag-bg: var(--neutral-100);
  --tag-text: var(--neutral-700);

  --font-body:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol", "Noto Color Emoji";
  --font-mono:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: var(--neutral-900);
    --bg-surface: var(--dark-surface);
    --fg: var(--neutral-200);
    --fg-secondary: var(--neutral-300);
    --fg-muted: var(--neutral-600);
    --accent: var(--neutral-200);

    --border: var(--dark-border);
    --border-strong: var(--dark-border-strong);

    --sidebar-bg: var(--dark-sidebar);
    --sidebar-fg: var(--neutral-200);
    --sidebar-fg-secondary: var(--neutral-600);

    --terminal-bg: var(--neutral-950);
    --terminal-fg: var(--neutral-300);

    --tag-bg: var(--neutral-800);
    --tag-text: var(--neutral-300);

    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: var(--neutral-900);
  --bg-surface: var(--dark-surface);
  --fg: var(--neutral-200);
  --fg-secondary: var(--neutral-300);
  --fg-muted: var(--neutral-600);
  --accent: var(--neutral-200);

  --border: var(--dark-border);
  --border-strong: var(--dark-border-strong);

  --sidebar-bg: var(--dark-sidebar);
  --sidebar-fg: var(--neutral-200);
  --sidebar-fg-secondary: var(--neutral-600);

  --terminal-bg: var(--neutral-950);
  --terminal-fg: var(--neutral-300);

  --tag-bg: var(--neutral-800);
  --tag-text: var(--neutral-300);

  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: var(--neutral-50);
  --bg-surface: var(--white);
  --fg: var(--neutral-800);
  --fg-secondary: var(--neutral-600);
  --fg-muted: var(--neutral-300);
  --accent: var(--neutral-800);

  --border: var(--neutral-200);
  --border-strong: var(--neutral-300);

  --sidebar-bg: var(--neutral-100);
  --sidebar-fg: var(--neutral-800);
  --sidebar-fg-secondary: var(--neutral-600);

  --terminal-bg: var(--neutral-800);
  --terminal-fg: var(--neutral-200);

  --tag-bg: var(--neutral-100);
  --tag-text: var(--neutral-700);

  color-scheme: light;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  margin: 0;
  font-size: 0.95rem;
  transition: background-color 0.3s ease, 
              color 0.3s ease, 
              border-color 0.3s ease, 
              box-shadow 0.3s ease;
}

/* Layout: sidebar + content on desktop, stacked on mobile */
.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* Sidebar — sticky on desktop, top bar on mobile */
.sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-fg);
  padding: 2.5rem 2rem;
  padding-left: max(2rem, env(safe-area-inset-left, 0px));
  padding-right: max(2rem, env(safe-area-inset-right, 0px));
  position: sticky;
  top: 0;
  height: calc(100vh - 5rem);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--border);
}

@media (max-width: 800px) {
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-block: 2rem;
    padding-left: max(2rem, env(safe-area-inset-left, 0px));
    padding-right: max(2rem, env(safe-area-inset-right, 0px));
  }
}

.name {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}
.role {
  font-size: 0.875rem;
  color: var(--sidebar-fg-secondary);
  margin: 0 0 1.25rem 0;
}

.bio {
  font-size: 0.875rem;
  color: var(--sidebar-fg-secondary);
  line-height: 1.5;
  margin-bottom: 2rem;
}

.skills-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-fg-secondary);
  margin-bottom: 0.75rem;
}
.skills-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.skills-list li {
  font-size: 0.85rem;
  padding: 0.35rem 0;
  color: var(--sidebar-fg-secondary);
  border-bottom: 1px solid var(--border);
}
.skills-list li:last-child {
  border-bottom: none;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.sidebar-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--sidebar-fg-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.sidebar-nav a:hover {
  color: var(--fg);
}

.theme-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: transparent;
  color: var(--sidebar-fg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.75rem;
  text-align: left;
  cursor: pointer;
  margin-top: 1rem;
  transition: all 0.15s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.theme-btn:hover {
  color: var(--fg);
  border-color: var(--border-strong);
}

.no-js .theme-btn {
  display: none;
}

/* Content area */
.content {
  padding: 3rem 3rem;
  padding-left: max(3rem, env(safe-area-inset-left, 0px));
  padding-right: max(3rem, env(safe-area-inset-right, 0px));
}

@media (max-width: 800px) {
  .content {
    padding: 2rem;
    padding-left: max(2rem, env(safe-area-inset-left, 0px));
    padding-right: max(2rem, env(safe-area-inset-right, 0px));
  }
}

/* Terminal hero — interactive */
.terminal {
  background: var(--terminal-bg);
  color: var(--terminal-fg);
  border-radius: 8px;
  padding: 1.5rem 1.75rem;
  padding-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
  cursor: text;
}
.terminal::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 32px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.no-js .terminal::after {
  content: "Terminal Emulator requires JavaScript to function.";
  position: absolute;
  opacity: 0;
  transition: opacity 0.3s ease-in;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
}
.no-js .terminal:hover::after {
  opacity: 1;
}
.terminal-dots {
  position: absolute;
  top: 10px;
  left: 12px;
  display: flex;
  gap: 6px;
}
.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}
.terminal-dot:nth-child(1) {
  background: #ff5f57;
}
.terminal-dot:nth-child(2) {
  background: #febc2e;
}
.terminal-dot:nth-child(3) {
  background: #28c840;
}

.terminal-hint {
  position: absolute;
  bottom: 8px;
  right: 14px;
  font-size: 0.65rem;
  color: var(--fg-muted);
  opacity: 0.6;
  pointer-events: none;
  transition: opacity 0.3s;
}
.terminal.active .terminal-hint {
  opacity: 0;
}

.terminal-body {
  margin-top: 1.25rem;
}
.prompt-line {
  margin-bottom: 0.25rem;
}
.prompt-user {
  color: var(--terminal-green);
}
.prompt-host {
  color: var(--terminal-blue);
}
.prompt-symbol {
  color: var(--fg-muted);
}
.prompt-cmd {
  color: var(--terminal-fg);
}

.output-line {
  white-space: pre-wrap;
  padding: 1px 0;
}
.output-line.bright {
  color: var(--terminal-fg);
  font-weight: 500;
}
.output-line.dim {
  color: var(--fg-muted);
}
.output-line.highlight {
  color: var(--terminal-purple);
}
.output-line.error {
  color: #f87171;
}
.output-line.cmd-name {
  color: var(--terminal-green);
}
.output-line a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.output-line a:hover {
  text-decoration-thickness: 2px;
}

/* Active input row */
.terminal-input {
  display: flex;
  align-items: baseline;
  margin-top: 0.25rem;
  gap: 0;
}
.terminal-input input {
  background: none;
  border: none;
  color: var(--terminal-fg);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  flex: 1;
  caret-color: var(--terminal-green);
}

/* Section label */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--fg);
}

/* Filter buttons */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--fg-secondary);
  cursor: pointer;
  transition: all 0.15s;
}
.no-js .filter-btn {
  cursor: default;
}
.filter-btn:hover {
  border-color: var(--border-strong);
  color: var(--fg);
}
.no-js .filter-btn {
  border-color: var(--border);
  color: var(--fg-secondary);
}
.filter-btn.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
/* The active button with no JS will always be All */
.no-js .filter-btn.active {
  display: none;
}

/* Scroll reveal */
.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Card grid */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  align-items: start;
  position: relative; /* Container for absolute positioning if desired */
}

/* Card trigger styling */
.card-trigger {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Base card container stays locked in the grid */
.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}
.project-card.hidden {
  display: none;
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  border-color: var(--border-strong);
}

.project-overlay {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9999;
  overflow-y: auto;
  padding: 3rem 1rem;
  box-sizing: border-box;
  justify-content: center;
  align-items: flex-start;

  /* Hidden state */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.project-overlay:target {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.overlay-content {
  background: var(--bg-surface);
  color: var(--fg);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 2.5rem;
  width: min(750px, 90vw);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.3);
  position: relative;
  margin: auto;

  /* Slide-up starting state */
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

/* Slide into place when targeted */
.project-overlay:target .overlay-content {
  transform: translateY(0);
}

/* Close/Back button inside overlay */
.overlay-close-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  display: inline-block;
  background: transparent;
  color: var(--fg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  transition: all 0.15s;
}

.overlay-close-btn:hover {
  color: var(--fg);
  border-color: var(--border-strong);
  background: var(--bg);
}

@media (max-width: 800px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
}

.project-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.2rem 0;
}
.project-subtitle {
  font-size: 0.8rem;
  color: var(--fg-secondary);
  margin: 0 0 0.75rem 0;
}
.project-desc {
  font-size: 0.85rem;
  color: var(--fg-secondary);
  line-height: 1.5;
  margin: 0;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 1rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

/* Expanded detail — animated */
.metrics-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.metric {
  flex: 1;
  min-width: 100px;
  padding: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg);
}
.metric-label {
  font-size: 0.7rem;
  color: var(--fg-muted);
  margin-top: 0.15rem;
}

.detail-section {
  margin-bottom: 0.75rem;
}
.detail-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
  margin-bottom: 0.3rem;
}
.detail-text {
  font-size: 0.85rem;
  color: var(--fg-secondary);
  line-height: 1.5;
  margin: 0;
}
.detail-code {
  background: var(--terminal-bg);
  color: var(--terminal-fg);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.5;
  margin: 0;
}

/* Footer */
.footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer a:hover {
  color: var(--fg);
}

/* 404 */
.not-found {
  min-height: 100vh;
  box-sizing: border-box;
  display: grid;
  place-items: center;
  padding: 2rem;
  padding-left: max(2rem, env(safe-area-inset-left, 0px));
  padding-right: max(2rem, env(safe-area-inset-right, 0px));
}
.not-found .terminal {
  width: min(640px, 100%);
  margin-bottom: 0;
  cursor: text;
}
.output-line.error-code {
  font-size: 3rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--terminal-purple);
  padding: 0.5rem 0;
}