/* ===================================================================
   Developer TUI Portfolio — Stylesheet
   Vanilla CSS port (theme system driven by CSS custom properties)
=================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700;800&family=VT323&display=swap');

/* ---------- Theme Definitions ---------- */
/* Each theme sets the same variable set; body[data-theme="x"] selects it */

body, [data-theme="dracula"] {
  --bg: #1e1f29;
  --panel-bg: #282a36;
  --border: #44475a;
  --text: #f8f8f2;
  --text-muted: #6272a4;
  --accent: #bd93f9;
  --secondary: #ff79c6;
  --success: #50fa7b;
  --warning: #f1fa8c;
  --error: #ff5555;
  --prompt-user: #50fa7b;
  --prompt-host: #8be9fd;
  --font-family: "JetBrains Mono", "Fira Code", "Courier New", monospace;
}

[data-theme="matrix"] {
  --bg: #030a03;
  --panel-bg: #091509;
  --border: #1b4d1b;
  --text: #22da22;
  --text-muted: #128212;
  --accent: #00ff00;
  --secondary: #39ff14;
  --success: #20e020;
  --warning: #a3ff00;
  --error: #ff3333;
  --prompt-user: #00ff00;
  --prompt-host: #128212;
  --font-family: "VT323", "Courier New", monospace;
}

[data-theme="cyberpunk"] {
  --bg: #0d0d15;
  --panel-bg: #181825;
  --border: #ff0055;
  --text: #00f0ff;
  --text-muted: #7078a0;
  --accent: #fcee0a;
  --secondary: #ff0055;
  --success: #00ff9f;
  --warning: #ffe600;
  --error: #ff003c;
  --prompt-user: #fcee0a;
  --prompt-host: #00f0ff;
  --font-family: "Fira Code", "VT323", monospace;
}

[data-theme="nord"] {
  --bg: #2e3440;
  --panel-bg: #3b4252;
  --border: #4c566a;
  --text: #eceff4;
  --text-muted: #d8dee9;
  --accent: #88c0d0;
  --secondary: #81a1c1;
  --success: #a3be8c;
  --warning: #ebcb8b;
  --error: #bf616a;
  --prompt-user: #a3be8c;
  --prompt-host: #81a1c1;
  --font-family: "JetBrains Mono", monospace;
}

[data-theme="gruvbox"] {
  --bg: #1d2021;
  --panel-bg: #282828;
  --border: #504945;
  --text: #ebdbb2;
  --text-muted: #928374;
  --accent: #fe8019;
  --secondary: #fabd2f;
  --success: #b8bb26;
  --warning: #fabd2f;
  --error: #fb4934;
  --prompt-user: #b8bb26;
  --prompt-host: #83a598;
  --font-family: "Courier New", monospace;
}

[data-theme="monokai"] {
  --bg: #2d2a2e;
  --panel-bg: #363537;
  --border: #4a484b;
  --text: #fcfcfa;
  --text-muted: #727072;
  --accent: #ffd866;
  --secondary: #ff6188;
  --success: #a9dc76;
  --warning: #fc9867;
  --error: #ff6188;
  --prompt-user: #a9dc76;
  --prompt-host: #78dce8;
  --font-family: "Fira Code", monospace;
}

[data-theme="solarized-light"] {
  --bg: #fdf6e3;
  --panel-bg: #eee8d5;
  --border: #93a1a1;
  --text: #073642;
  --text-muted: #657b83;
  --accent: #268bd2;
  --secondary: #d33682;
  --success: #859900;
  --warning: #b58900;
  --error: #dc322f;
  --prompt-user: #859900;
  --prompt-host: #268bd2;
  --font-family: "Courier New", monospace;
}

/* ---------- Reset ---------- */

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-family);
  overflow: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea, select {
  font-family: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

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

ul { margin: 0; padding: 0; list-style: none; }

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

/* ---------- Custom Scrollbar ---------- */

.custom-scrollbar::-webkit-scrollbar { width: 6px; height: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); }
.custom-scrollbar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 2px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.4); }

/* ---------- CRT Effect ---------- */

body.crt-on .app::before {
  content: " ";
  display: block;
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(18,16,16,0) 50%, rgba(0,0,0,0.25) 50%),
    linear-gradient(90deg, rgba(255,0,0,0.03), rgba(0,255,0,0.01), rgba(0,0,255,0.03));
  background-size: 100% 3px, 6px 100%;
  pointer-events: none;
  opacity: 0.8;
  z-index: 50;
}

body.crt-on .app {
  animation: crtFlicker 0.15s infinite;
}

@keyframes crtFlicker {
  0% { opacity: 0.99; }
  50% { opacity: 1; }
  100% { opacity: 0.98; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in { animation: fadeIn 0.2s ease-out; }

@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin 1s linear infinite; }

/* ---------- App Shell ---------- */

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  font-family: var(--font-family);
}

#matrix-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
  display: none;
}

#matrix-canvas.active { display: block; }

/* =====================================================================
   Header Bar
===================================================================== */

.header-bar {
  border-bottom: 1px solid var(--border);
  background-color: var(--panel-bg);
  color: var(--text);
  padding: 6px 12px;
  font-size: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  z-index: 20;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  user-select: none;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.brand .version-badge {
  font-size: 10px;
  padding: 1px 4px;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-left: 4px;
  text-transform: uppercase;
  color: var(--success);
}

.header-path {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.8;
  font-size: 11px;
}

.header-path .sep { color: var(--text-muted); }
.header-path strong { color: var(--prompt-host); }
.header-path .truncate {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 11px;
  padding: 2px 12px;
  border-radius: 4px;
  background-color: var(--bg);
}

.stat-item { display: flex; align-items: center; gap: 6px; }
.stat-label { color: var(--text-muted); }
.stat-bar {
  width: 48px;
  height: 8px;
  background: rgba(0,0,0,0.4);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}
.stat-bar-fill { height: 100%; transition: width 0.5s ease; }
.stat-value { width: 28px; text-align: right; font-weight: 600; }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.icon-toggle-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text);
  opacity: 0.7;
  transition: opacity 0.15s, background-color 0.15s, border-color 0.15s, color 0.15s;
  font-size: 11px;
  background: transparent;
}

.icon-toggle-btn:hover { opacity: 1; }

.icon-toggle-btn.active {
  font-weight: 700;
  opacity: 1;
}

.icon-toggle-btn svg { width: 12px; height: 12px; flex-shrink: 0; }

#btn-crt-toggle.active {
  border-color: var(--accent);
  background-color: color-mix(in srgb, var(--accent) 13%, transparent);
  color: var(--accent);
}

#btn-matrix-toggle.active {
  border-color: var(--success);
  background-color: color-mix(in srgb, var(--success) 13%, transparent);
  color: var(--success);
}

.theme-select-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
}

.theme-select-wrap svg { width: 12px; height: 12px; color: var(--accent); flex-shrink: 0; }

#theme-select {
  background: transparent;
  border: none;
  font-size: 12px;
  cursor: pointer;
  outline: none;
  color: var(--text);
  max-width: 120px;
}

.clock-display {
  font-weight: 600;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  letter-spacing: 0.1em;
  color: var(--accent);
}

/* =====================================================================
   Main Split Layout
===================================================================== */

.main-split {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
  z-index: 10;
  min-height: 0;
}

/* ---------- Sidebar ---------- */

.sidebar {
  width: 256px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background-color: var(--panel-bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  user-select: none;
}

.sidebar.hidden { display: none; }

.sidebar-title-bar {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.sidebar-title-bar .title-group { display: flex; align-items: center; gap: 6px; }
.sidebar-title-bar svg { width: 14px; height: 14px; }

.sidebar-collapse-btn {
  font-size: 12px;
  padding: 0 4px;
  opacity: 0.6;
}
.sidebar-collapse-btn:hover { opacity: 1; }

.sidebar-root-path {
  padding: 6px 12px;
  font-size: 11px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0.75;
  background-color: var(--bg);
}
.sidebar-root-path .user { color: var(--prompt-user); }
.sidebar-root-path .path { color: var(--text-muted); }

.sidebar-tree {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.tree-node-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 12px;
  border-left: 2px solid transparent;
  color: var(--text);
  opacity: 0.8;
  transition: background-color 0.15s, opacity 0.15s;
}

.tree-node-row:hover { background: rgba(255,255,255,0.05); opacity: 1; }

.tree-node-row.active {
  font-weight: 700;
  opacity: 1;
  background-color: color-mix(in srgb, var(--accent) 13%, transparent);
  color: var(--accent);
  border-left-color: var(--accent);
}

.tree-node-row svg { width: 13px; height: 13px; flex-shrink: 0; }
.tree-node-row .folder-icon { color: var(--warning); }
.tree-node-row .chevron { color: var(--text-muted); }
.tree-node-row.expanded .chevron { color: var(--accent); }
.tree-node-row .node-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tree-node-row.folder .node-name { font-weight: 600; }

.sidebar-footer {
  padding: 10px;
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--text-muted);
  background-color: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-footer .row { display: flex; justify-content: space-between; }
.sidebar-footer .row span:last-child { color: var(--text); }
.sidebar-footer .status-value { color: var(--success) !important; }
.sidebar-footer .tip { opacity: 0.6; margin-top: 4px; font-size: 9px; }

.sidebar-expand-btn {
  padding: 8px;
  border-right: 1px solid var(--border);
  background-color: var(--panel-bg);
  color: var(--accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.sidebar-expand-btn:hover { background: rgba(255,255,255,0.05); }
.sidebar-expand-btn svg { width: 16px; height: 16px; }
.sidebar-expand-btn .label {
  font-size: 10px;
  writing-mode: vertical-lr;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.7;
}

/* ---------- Main Area ---------- */

.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
  min-width: 0;
}

.main-buffer-scroll {
  flex: 1;
  overflow-y: auto;
}

.buffer-wrap {
  padding: 16px;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  font-size: 13px;
}

@media (min-width: 768px) {
  .buffer-wrap { padding: 24px; }
}

.panel {
  background-color: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.buffer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.buffer-header h2 {
  font-size: 15px;
  font-weight: 800;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.buffer-header .meta { font-size: 11px; opacity: 0.75; color: var(--text-muted); }

.readonly-box {
  padding: 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.2);
}

/* ---------- Neofetch View ---------- */

.neofetch-banner {
  overflow-x: auto;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.2);
}

.neofetch-banner pre {
  font-size: 9px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--accent);
  user-select: none;
  margin: 0;
}

@media (min-width: 640px) { .neofetch-banner pre { font-size: 11px; } }

.neofetch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 20px;
}

@media (min-width: 768px) {
  .neofetch-grid { grid-template-columns: 5fr 7fr; }
}

.neofetch-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
}

@media (min-width: 768px) {
  .neofetch-left {
    border-bottom: none;
    border-right: 1px solid var(--border);
    padding-bottom: 0;
    padding-right: 24px;
  }
}

.neofetch-left pre {
  font-size: 11px;
  line-height: 1.15;
  font-weight: 700;
  color: var(--prompt-user);
  text-align: left;
  margin: 0 0 16px 0;
  user-select: none;
}

.social-links { width: 100%; display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }

.social-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 12px;
  transition: background-color 0.15s;
}
.social-link:hover { background: rgba(255,255,255,0.05); }
.social-link .label { display: flex; align-items: center; gap: 8px; }
.social-link svg { width: 14px; height: 14px; }
.social-link .ext-icon { color: var(--text-muted); width: 12px; height: 12px; }

.neofetch-right { display: flex; flex-direction: column; gap: 16px; }

.neofetch-name-row {
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.neofetch-name {
  font-size: 16px;
  font-weight: 800;
  color: var(--accent);
}
.neofetch-name .handle { font-size: 12px; font-weight: 400; color: var(--text-muted); margin-left: 4px; }

.status-pill {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--success);
  color: var(--success);
  font-weight: 600;
  white-space: nowrap;
}

.spec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 16px;
  font-size: 12px;
}
@media (min-width: 640px) { .spec-grid { grid-template-columns: 1fr 1fr; } }
.spec-grid .k { color: var(--text-muted); }
.spec-grid .v { font-weight: 600; }
.spec-grid .v.success { color: var(--success); }

.bio-box {
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.action-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-top: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 12px;
  transition: transform 0.1s;
  border: 1px solid transparent;
}
.btn:active { transform: scale(0.95); }
.btn svg { width: 14px; height: 14px; }

.btn-primary { background-color: var(--accent); color: var(--bg); box-shadow: 0 2px 6px rgba(0,0,0,0.2); }
.btn-outline { border-color: var(--border); font-weight: 600; }
.btn-outline:hover { background: rgba(255,255,255,0.05); }
.btn-ghost-accent { color: var(--secondary); border-color: var(--border); font-weight: 600; }
.btn-ghost-accent:hover { background: rgba(255,255,255,0.05); }
.btn.ml-auto { margin-left: auto; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Skills View ---------- */

.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) { .skills-grid { grid-template-columns: 1fr 1fr; } }

.skill-cat-card {
  padding: 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--panel-bg);
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skill-cat-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.skill-row { display: flex; flex-direction: column; gap: 4px; font-size: 12px; }
.skill-row-top { display: flex; justify-content: space-between; align-items: center; }
.skill-name { font-weight: 600; display: flex; align-items: center; gap: 6px; }
.skill-pct { font-size: 11px; color: var(--success); }
.skill-track {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  overflow: hidden;
  padding: 1px;
}
.skill-fill { height: 100%; border-radius: 2px; transition: width 0.7s ease; }

/* ---------- Experience View ---------- */

.exp-list { display: flex; flex-direction: column; gap: 24px; }

.exp-card {
  padding: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--panel-bg);
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exp-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.exp-role { font-size: 14px; font-weight: 800; color: var(--accent); }
.exp-company { font-size: 12px; font-weight: 600; }
.exp-company .loc { color: var(--text-muted); font-weight: 400; }

.exp-period {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--success);
  color: var(--success);
  background-color: var(--bg);
  white-space: nowrap;
}

.exp-highlights { display: flex; flex-direction: column; gap: 8px; font-size: 12px; line-height: 1.6; margin: 0; }
.exp-highlights li { display: flex; align-items: flex-start; gap: 8px; }
.exp-highlights .bullet { color: var(--prompt-user); }

.tech-tags { display: flex; flex-wrap: wrap; gap: 6px; padding-top: 8px; }
.tech-tag {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text-muted);
}
.tech-tag.hash {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  color: var(--accent);
}

/* ---------- Project View ---------- */

.project-card { padding: 24px; display: flex; flex-direction: column; gap: 20px; }

.project-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.project-eyebrow { font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; color: var(--text-muted); }
.project-title { font-size: 20px; font-weight: 800; color: var(--accent); margin: 4px 0 0 0; }
.project-tagline { font-size: 12px; font-weight: 500; color: var(--secondary); margin: 4px 0 0 0; }

.project-badges { display: flex; align-items: center; gap: 8px; }
.project-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-weight: 600;
}
.project-badge svg { width: 13px; height: 13px; }

.project-details-box {
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.section-label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--secondary); margin: 0 0 8px 0; }
.section-label.muted { color: var(--text-muted); }

.highlight-grid { display: grid; grid-template-columns: 1fr; gap: 8px; font-size: 12px; }
@media (min-width: 640px) { .highlight-grid { grid-template-columns: 1fr 1fr; } }
.highlight-item {
  padding: 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.highlight-item svg { width: 14px; height: 14px; color: var(--success); flex-shrink: 0; }

.link-row { display: flex; flex-wrap: wrap; gap: 12px; padding-top: 16px; border-top: 1px solid var(--border); }

/* =====================================================================
   Contact Form
===================================================================== */

.contact-wrap { max-width: 720px; }

.contact-card { padding: 20px; }

.contact-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.contact-header .title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; color: var(--accent); }
.contact-header .title svg { width: 18px; height: 18px; }
.contact-header .protocol { font-size: 11px; padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border); color: var(--text-muted); }

.field-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .field-grid { grid-template-columns: 1fr 1fr; } }

.field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.field input, .field textarea {
  width: 100%;
  padding: 8px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text);
  font-size: 12px;
  outline: none;
  font-family: inherit;
}
.field textarea { resize: none; }
.field input:focus, .field textarea:focus { border-color: var(--accent); }

.contact-form { display: flex; flex-direction: column; gap: 16px; }

.send-log-box {
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.send-log-box div { color: var(--prompt-user); }

.form-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 8px; }
.required-note { font-size: 11px; color: var(--text-muted); }

.success-panel { padding: 24px; text-align: center; display: flex; flex-direction: column; gap: 16px; align-items: center; }
.success-icon-circle {
  display: inline-flex;
  padding: 12px;
  border-radius: 999px;
  border: 1px solid var(--success);
  background-color: color-mix(in srgb, var(--success) 13%, transparent);
}
.success-icon-circle svg { width: 32px; height: 32px; color: var(--success); }
.success-panel h3 { font-size: 15px; font-weight: 800; color: var(--success); margin: 0; }
.success-panel p { font-size: 12px; max-width: 400px; margin: 0; }

.outbox-panel { padding: 16px; margin-top: 16px; }
.outbox-title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 12px; color: var(--accent); margin-bottom: 12px; }
.outbox-title svg { width: 14px; height: 14px; }
.outbox-list { display: flex; flex-direction: column; gap: 8px; max-height: 192px; overflow-y: auto; }
.outbox-item { padding: 10px; border-radius: 4px; border: 1px solid var(--border); background-color: var(--bg); font-size: 12px; display: flex; flex-direction: column; gap: 4px; }
.outbox-item .top { display: flex; justify-content: space-between; font-weight: 600; }
.outbox-item .top .date { color: var(--text-muted); font-weight: 400; }
.outbox-item .subject { font-weight: 700; color: var(--warning); }
.outbox-item .msg { opacity: 0.8; margin: 0; }

/* =====================================================================
   Snake Game
===================================================================== */

.snake-wrap { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 16px; user-select: none; }

.snake-card { width: 100%; max-width: 380px; padding: 16px; }

.snake-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.snake-title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; color: var(--accent); }
.snake-title svg { width: 18px; height: 18px; }
.snake-stats { display: flex; align-items: center; gap: 12px; font-size: 12px; }
.snake-stats .hs { display: flex; align-items: center; gap: 4px; color: var(--warning); }
.snake-stats .hs svg { width: 12px; height: 12px; }

.snake-board-wrap {
  position: relative;
  display: grid;
  gap: 1px;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  margin: 0 auto;
  width: 280px;
  height: 280px;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.3);
  overflow: hidden;
}

.snake-cell {
  width: 100%;
  height: 100%;
  border-radius: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
}

.snake-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(2px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
}
.snake-overlay h3 { font-size: 17px; font-weight: 800; margin: 0 0 4px 0; }
.snake-overlay p { font-size: 12px; margin: 0 0 12px 0; opacity: 0.9; }

.dpad { margin-top: 16px; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.dpad-row { display: flex; gap: 8px; }
.dpad-btn {
  width: 40px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg);
}
.dpad-btn:active { transform: scale(0.95); }

/* =====================================================================
   Output Pane (command log stream)
===================================================================== */

.output-pane {
  border-top: 1px solid var(--border);
  max-height: 192px;
  overflow-y: auto;
  padding: 12px;
  font-size: 12px;
  background-color: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
}

.output-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
  opacity: 0.75;
}
.output-pane-title { display: flex; align-items: center; gap: 6px; font-weight: 700; font-size: 11px; color: var(--accent); }
.output-pane-title svg { width: 12px; height: 12px; }

.clear-logs-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  opacity: 0.7;
  color: var(--error);
}
.clear-logs-btn:hover { opacity: 1; }
.clear-logs-btn svg { width: 10px; height: 10px; }

.log-entry { display: flex; flex-direction: column; gap: 4px; }
.log-cmd-line { display: flex; align-items: center; gap: 6px; font-weight: 700; flex-wrap: wrap; }
.log-cmd-line .ts { margin-left: auto; font-size: 10px; opacity: 0.4; font-weight: 400; }
.log-output {
  padding: 4px 0 4px 12px;
  border-left: 2px solid color-mix(in srgb, var(--accent) 40%, transparent);
  font-size: 12px;
  line-height: 1.6;
}
.log-output pre { white-space: pre-wrap; font-family: inherit; font-size: 12px; margin: 0; }

.help-grid { display: grid; grid-template-columns: 1fr; gap: 4px 24px; font-size: 12px; }
@media (min-width: 640px) { .help-grid { grid-template-columns: 1fr 1fr; } }
.help-title { font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.help-grid strong { color: var(--success); }

.ls-list { display: flex; flex-wrap: wrap; gap: 16px; font-size: 12px; }
.ls-item { cursor: pointer; }
.ls-item:hover { text-decoration: underline; }

/* =====================================================================
   Terminal Prompt
===================================================================== */

.terminal-prompt {
  position: relative;
  border-top: 1px solid var(--border);
  background-color: var(--panel-bg);
  padding: 8px 12px;
  font-size: 12px;
  z-index: 10;
  flex-shrink: 0;
}

.suggestions-popup {
  position: absolute;
  bottom: 100%;
  left: 12px;
  margin-bottom: 4px;
  padding: 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  z-index: 30;
}
.suggestions-popup .label { font-size: 10px; font-weight: 700; padding: 0 4px; color: var(--text-muted); }
.suggestions-popup button {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.suggestions-popup button.first { background-color: color-mix(in srgb, var(--accent) 13%, transparent); color: var(--accent); }

.prompt-line { display: flex; align-items: center; gap: 8px; }
.prompt-label { display: flex; align-items: center; gap: 2px; font-weight: 700; white-space: nowrap; user-select: none; }
.prompt-label .user { color: var(--prompt-user); }
.prompt-label .sep { color: var(--text-muted); }
.prompt-label .host { color: var(--prompt-host); }
.prompt-label .dollar { color: var(--accent); }

#terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  font-size: 12px;
  outline: none;
  color: var(--text);
}
#terminal-input::placeholder { opacity: 0.4; }

.prompt-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.6;
  font-size: 10px;
  white-space: nowrap;
}
.prompt-hint button { padding: 4px; border-radius: 4px; border: 1px solid var(--border); color: var(--accent); }
.prompt-hint button svg { width: 12px; height: 12px; }

/* =====================================================================
   Status Bar (Function key shortcuts)
===================================================================== */

.status-bar {
  border-top: 1px solid var(--border);
  background-color: var(--panel-bg);
  color: var(--text);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  overflow-x: auto;
  z-index: 20;
  user-select: none;
  flex-shrink: 0;
}

.shortcuts-row { display: flex; align-items: center; gap: 6px; }

.shortcut-btn {
  display: flex;
  align-items: center;
  border-radius: 4px;
  border: 1px solid var(--border);
  overflow: hidden;
  flex-shrink: 0;
}
.shortcut-btn .key { padding: 2px 6px; font-weight: 700; background-color: var(--accent); color: var(--bg); }
.shortcut-btn .label { padding: 2px 6px; background-color: var(--bg); color: var(--text); }

.status-hints { display: flex; align-items: center; gap: 8px; font-size: 10px; opacity: 0.6; margin-left: 12px; }

/* =====================================================================
   Responsive visibility helpers
===================================================================== */

.hide-mobile { display: none; }
.hide-tablet { display: none; }
.show-md { display: none; }

@media (min-width: 640px) { .hide-mobile { display: inline-flex; } }
@media (min-width: 768px) { .show-md { display: flex; } }
@media (min-width: 1024px) { .hide-tablet { display: flex; } }

@media (max-width: 767px) {
  .sidebar { position: fixed; left: 0; top: 41px; bottom: 66px; z-index: 40; box-shadow: 4px 0 12px rgba(0,0,0,0.4); }
  
  /* Glowing FILES button & pointing arrow mark on mobile */
  .sidebar-header-toggle {
    position: relative;
    border-color: var(--accent) !important;
    color: var(--accent) !important;
    animation: pulse-glow-mobile 1.6s infinite alternate ease-in-out;
  }

  .mobile-arrow-pointer {
    display: inline-block;
    font-size: 14px;
    animation: bounce-arrow-mobile 0.8s infinite alternate ease-in-out;
    margin-right: 2px;
  }
}

@media (min-width: 768px) {
  .mobile-arrow-pointer {
    display: none;
  }
}

@keyframes pulse-glow-mobile {
  0% {
    box-shadow: 0 0 4px var(--accent), inset 0 0 2px var(--accent);
    transform: scale(1);
  }
  100% {
    box-shadow: 0 0 14px var(--secondary), 0 0 22px var(--accent), inset 0 0 6px var(--accent);
    border-color: var(--secondary) !important;
    color: var(--secondary) !important;
    transform: scale(1.05);
  }
}

@keyframes bounce-arrow-mobile {
  0% {
    transform: rotate(180deg) scaleY(-1) translateX(0);
  }
  100% {
    transform: rotate(180deg) scaleY(-1) translateX(-4px);
  }
}