:root {
  --titlebar-bg: #3c3c3c;
  --activity-bg: #333333;
  --activity-fg: #858585;
  --activity-fg-active: #ffffff;
  --sidebar-bg: #252526;
  --sidebar-fg: #cccccc;
  --sidebar-fg-dim: #8a8a8a;
  --sidebar-border: #2d2d30;
  --sidebar-header: #bbbbbb;
  --sidebar-hover: #2a2d2e;
  --sidebar-active: #37373d;
  --sidebar-drop: #094771;
  --editor-bg: #1e1e1e;
  --editor-fg: #d4d4d4;
  --editor-selection: #264f78;
  --tabs-bg: #2d2d30;
  --tab-inactive-bg: #2d2d30;
  --tab-active-bg: #1e1e1e;
  --tab-fg: #969696;
  --tab-fg-active: #ffffff;
  --tab-border: #3e3e42;
  --statusbar-bg: #007acc;
  --statusbar-fg: #ffffff;
  --accent: #0e639c;
  --accent-hover: #1177bb;
  --success: #4ec9b0;
  --warning: #dcdcaa;
  --danger: #f48771;
  --danger-hover: #e65a3c;
  --focus: #007fd4;
  --border: #3e3e42;

  --font-ui: 'Inter', -apple-system, Segoe UI, sans-serif;
  --font-mono: 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--editor-bg);
  color: var(--editor-fg);
  font-family: var(--font-ui);
  font-size: 13px;
  overflow: hidden;
  user-select: none;
}
body { display: flex; flex-direction: column; }

/* ===== Titlebar ===== */
.titlebar {
  height: 32px; background: var(--titlebar-bg);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 12px; font-size: 12px; flex-shrink: 0; color: #cccccc;
  border-bottom: 1px solid #1a1a1a;
}
.titlebar-left { display: flex; align-items: center; gap: 10px; }
.title-mark { color: #d4d4d4; font-size: 11px; }
.title-text { color: #d4d4d4; font-weight: 500; }
.title-sep { color: #666; }
.title-file { color: #969696; }
.user-email { color: #969696; font-size: 12px; }

.app { flex: 1; display: flex; overflow: hidden; }

/* ===== Activity bar ===== */
.activity-bar {
  width: 48px; background: var(--activity-bg);
  display: flex; flex-direction: column; align-items: center;
  flex-shrink: 0;
}
.activity-btn {
  width: 48px; height: 48px; border: none; background: transparent;
  color: var(--activity-fg); cursor: pointer; display: flex;
  align-items: center; justify-content: center; position: relative;
  transition: color 0.1s;
}
.activity-btn:hover { color: var(--activity-fg-active); }
.activity-btn.active { color: var(--activity-fg-active); }
.activity-btn.active::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--activity-fg-active);
}
.activity-spacer { flex: 1; }

/* ===== Sidebar ===== */
.sidebar {
  width: 300px; background: var(--sidebar-bg); color: var(--sidebar-fg);
  display: flex; flex-direction: column; flex-shrink: 0;
  border-right: 1px solid var(--sidebar-border);
}
.sidebar-header {
  padding: 8px 20px; text-transform: uppercase;
  font-size: 11px; font-weight: 600; letter-spacing: 0.04em;
  color: var(--sidebar-header);
}
.sidebar-subheader {
  padding: 2px 10px 2px 20px; display: flex; align-items: center;
  justify-content: space-between; font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--sidebar-header);
}
.repo-name { user-select: none; }
.sidebar-actions { display: flex; gap: 2px; }
.icon-btn {
  width: 22px; height: 22px; border: none; background: transparent;
  color: var(--sidebar-fg); cursor: pointer; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  opacity: 0.7; transition: background 0.1s, opacity 0.1s;
}
.icon-btn:hover { background: var(--sidebar-hover); opacity: 1; }

.sidebar-hint {
  padding: 8px 16px; font-size: 11px; color: var(--sidebar-fg-dim);
  border-top: 1px solid var(--sidebar-border);
  display: flex; align-items: center; gap: 8px; line-height: 1.35;
}
.sidebar-hint svg { flex-shrink: 0; opacity: 0.7; }

/* ===== Tree (recursivo) ===== */
.tree {
  flex: 1; overflow-y: auto; padding: 4px 0 8px;
  font-size: 13px;
}
.tree-loading {
  padding: 12px 20px; color: var(--sidebar-fg-dim);
  font-style: italic; font-size: 12px;
}
.tree-folder { user-select: none; }
.tree-folder-header {
  display: flex; align-items: center; cursor: pointer;
  color: var(--sidebar-fg); height: 22px; padding-right: 10px;
}
.tree-folder-header:hover { background: var(--sidebar-hover); }
.tree-folder-header.drop-target {
  background: var(--sidebar-drop);
  outline: 1px dashed var(--focus);
  outline-offset: -1px;
}
.tree-folder-chevron {
  width: 16px; height: 16px; display: flex; align-items: center;
  justify-content: center; color: var(--sidebar-fg-dim); flex-shrink: 0;
  transition: transform 0.1s;
}
.tree-folder.collapsed > .tree-folder-header .tree-folder-chevron {
  transform: rotate(-90deg);
}
.tree-folder-icon {
  width: 18px; height: 18px; margin-right: 4px; flex-shrink: 0;
  color: #dcb67a;
}
.tree-folder-name {
  font-size: 13px; font-weight: 500; color: var(--sidebar-fg);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tree-folder-name.root { text-transform: none; }
.tree-folder-count {
  margin-left: auto; color: var(--sidebar-fg-dim);
  font-size: 11px; font-family: var(--font-mono);
}
.tree-folder-children {
  overflow: hidden;
}
.tree-folder.collapsed > .tree-folder-children { display: none; }
.tree-empty {
  color: var(--sidebar-fg-dim); font-style: italic; font-size: 12px;
  padding: 4px 0;
}

.tree-file {
  display: flex; align-items: center; cursor: pointer;
  color: var(--sidebar-fg); height: 22px; font-size: 13px;
  padding-right: 10px;
}
.tree-file:hover { background: var(--sidebar-hover); }
.tree-file.active { background: var(--sidebar-active); color: #ffffff; }
.tree-file-icon {
  width: 16px; height: 16px; margin-right: 6px; flex-shrink: 0;
}
.tree-file-icon.html { color: #e37933; }
.tree-file-icon.css { color: #519aba; }
.tree-file-icon.js { color: #f1e05a; }
.tree-file-icon.img { color: #b66eff; }
.tree-file-icon.other { color: #8a8a8a; }
.tree-file-name {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-family: var(--font-mono); font-size: 12px;
}

/* ===== Editor area ===== */
.editor-area {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
  background: var(--editor-bg);
}

.tabs {
  background: var(--tabs-bg); display: flex; align-items: stretch;
  border-bottom: 1px solid var(--border); height: 36px; flex-shrink: 0;
}
.tabs.hidden { display: none; }
.tab {
  display: flex; align-items: center; gap: 6px; padding: 0 12px;
  background: var(--tab-inactive-bg); color: var(--tab-fg);
  border-right: 1px solid var(--border); cursor: pointer;
  font-size: 13px; max-width: 260px;
}
.tab.active { background: var(--tab-active-bg); color: var(--tab-fg-active); position: relative; }
.tab.active::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: var(--focus);
}
.tab-icon { color: #519aba; flex-shrink: 0; }
.tab-name { font-family: var(--font-mono); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tab-dirty { color: #cccccc; font-size: 16px; line-height: 1; margin-left: 4px; }
.tabs-spacer { flex: 1; }
.tabs-actions { display: flex; align-items: center; gap: 4px; padding: 0 8px; }
.tab-action {
  display: flex; align-items: center; gap: 6px; padding: 4px 10px;
  background: transparent; color: var(--tab-fg);
  border: 1px solid transparent; border-radius: 3px; cursor: pointer;
  font-size: 12px; font-family: var(--font-ui); height: 26px;
}
.tab-action:hover { background: var(--sidebar-hover); color: var(--tab-fg-active); }
.tab-action.primary { background: var(--accent); color: #fff; }
.tab-action.primary:hover { background: var(--accent-hover); }
.tab-action.primary:disabled { opacity: 0.5; cursor: not-allowed; }
.tab-action.danger { background: transparent; color: var(--danger); }
.tab-action.danger:hover { background: #502421; color: #ffccc0; }

/* ===== Welcome ===== */
.welcome {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 40px;
}
.welcome-inner { max-width: 520px; text-align: center; }
.welcome-mark { font-size: 48px; color: #3e3e42; margin-bottom: 20px; }
.welcome h1 {
  font-size: 24px; font-weight: 300; color: #cccccc;
  margin-bottom: 8px; letter-spacing: -0.01em;
}
.welcome-sub { color: #858585; font-size: 14px; margin-bottom: 32px; }
.welcome-tips { display: flex; flex-direction: column; gap: 8px; font-size: 12px; color: #8a8a8a; }
.tip { padding: 6px 0; }
.tip kbd {
  background: #2d2d30; border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 3px;
  font-family: var(--font-mono); font-size: 11px; color: var(--editor-fg);
}
.tip code { font-family: var(--font-mono); color: var(--success); font-size: 12px; }

/* ===== Editor ===== */
.editor-wrapper { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.editor-wrapper.hidden { display: none; }
.welcome.hidden { display: none !important; }
.hidden { display: none !important; }

.editor-body { flex: 1; display: flex; overflow: hidden; position: relative; }
#editor {
  flex: 1; padding: 16px 20px; border: none; resize: none;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.6;
  background: var(--editor-bg); color: var(--editor-fg); outline: none;
  tab-size: 2; user-select: text;
}
#editor::selection { background: var(--editor-selection); }
.preview { flex: 1; border: none; background: white; }

/* Binary view (imágenes, PDFs, etc.) */
.binary-view {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 32px; background: #2d2d30;
}
.binary-view-inner {
  max-width: 90%; max-height: 100%; display: flex;
  flex-direction: column; align-items: center; gap: 16px;
}
.binary-view img {
  max-width: 100%; max-height: calc(100vh - 240px);
  background: white; padding: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,.5);
}
.binary-info { text-align: center; }
.binary-name { font-family: var(--font-mono); font-size: 13px; color: var(--editor-fg); }
.binary-meta { font-size: 12px; color: var(--sidebar-fg-dim); margin-top: 4px; }

/* ===== Statusbar ===== */
.statusbar {
  height: 22px; background: var(--statusbar-bg); color: var(--statusbar-fg);
  font-size: 12px; display: flex; align-items: center;
  justify-content: space-between; padding: 0 12px; flex-shrink: 0;
}
.statusbar-left, .statusbar-right { display: flex; align-items: center; gap: 16px; }
.status-item { display: flex; align-items: center; gap: 4px; }

/* ===== Modal ===== */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-content {
  background: var(--sidebar-bg); border: 1px solid var(--border);
  padding: 24px; border-radius: 4px; max-width: 520px; width: 90%;
  box-shadow: 0 8px 32px rgba(0,0,0,.4); color: var(--editor-fg);
  max-height: 85vh; display: flex; flex-direction: column;
}
.modal-content h3 {
  font-size: 16px; font-weight: 500; margin-bottom: 20px; color: #ffffff;
}
.modal-content label {
  display: block; font-size: 12px; color: var(--sidebar-fg-dim);
  margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.04em;
}
.modal-content input, .modal-content select {
  width: 100%; padding: 7px 10px; border: 1px solid var(--border);
  background: #3c3c3c; color: var(--editor-fg); border-radius: 2px;
  font-family: var(--font-mono); font-size: 13px; margin-top: 6px;
  outline: none; text-transform: none; letter-spacing: normal;
}
.modal-content input:focus, .modal-content select:focus { border-color: var(--focus); }
.help { font-size: 11px; color: var(--sidebar-fg-dim); margin: -8px 0 20px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }
.btn-primary, .btn-secondary {
  padding: 6px 16px; border-radius: 2px; font-size: 13px;
  cursor: pointer; border: 1px solid transparent; font-family: var(--font-ui);
}
.btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary { background: transparent; color: var(--editor-fg); border-color: var(--border); }
.btn-secondary:hover { background: var(--sidebar-hover); }

/* Dropzone (modal upload) */
.dropzone {
  border: 2px dashed var(--border); border-radius: 6px;
  padding: 28px 20px; text-align: center; color: var(--sidebar-fg);
  display: flex; flex-direction: column; align-items: center;
  gap: 8px; transition: border-color 0.15s, background 0.15s;
  margin-bottom: 16px;
}
.dropzone.active { border-color: var(--focus); background: rgba(14, 99, 156, 0.1); }
.dropzone svg { color: var(--sidebar-fg-dim); margin-bottom: 4px; }
.dropzone p { color: var(--sidebar-fg); font-size: 13px; }
.dropzone p.help { color: var(--sidebar-fg-dim); font-size: 11px; margin: 0; }
.upload-buttons { display: flex; gap: 8px; margin-top: 6px; }

.upload-filelist {
  max-height: 200px; overflow-y: auto; margin-bottom: 16px;
  background: #1e1e1e; border: 1px solid var(--border); border-radius: 3px;
  padding: 8px 12px;
}
.upload-filelist.hidden { display: none; }
.upload-file-item {
  font-family: var(--font-mono); font-size: 12px; color: var(--editor-fg);
  padding: 2px 0; display: flex; justify-content: space-between; gap: 8px;
}
.upload-file-size { color: var(--sidebar-fg-dim); font-size: 11px; }
.upload-summary {
  font-size: 12px; color: var(--sidebar-fg-dim); margin-bottom: 8px;
  padding: 0 4px;
}

/* Overwrite list */
.overwrite-list {
  max-height: 200px; overflow-y: auto; margin-bottom: 16px;
  background: #1e1e1e; border: 1px solid var(--border); border-radius: 3px;
  padding: 8px 12px; font-family: var(--font-mono); font-size: 12px;
  color: var(--warning);
}
.overwrite-list div { padding: 2px 0; }

/* Drop overlay (arrastre global sobre árbol) */
.drop-overlay {
  position: fixed; inset: 0; background: rgba(14, 99, 156, 0.2);
  backdrop-filter: blur(3px); display: flex; align-items: center;
  justify-content: center; z-index: 500; pointer-events: none;
  border: 4px dashed var(--focus);
}
.drop-overlay.hidden { display: none !important; }
.drop-overlay-inner {
  background: var(--sidebar-bg); padding: 48px 64px; border-radius: 12px;
  text-align: center; color: var(--editor-fg); border: 1px solid var(--focus);
  box-shadow: 0 12px 48px rgba(0,0,0,.6);
}
.drop-overlay-inner svg { color: var(--focus); margin-bottom: 16px; }
.drop-overlay-inner h2 {
  font-size: 22px; font-weight: 400; margin-bottom: 4px; color: #fff;
}
.drop-overlay-inner p { font-size: 14px; color: var(--sidebar-fg-dim); }

/* Toast */
.toast {
  position: fixed; bottom: 36px; right: 20px; padding: 10px 16px;
  border-radius: 3px; background: #252526; border: 1px solid var(--border);
  color: var(--editor-fg); font-size: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4); z-index: 200;
  animation: slide-in 0.15s ease-out; max-width: 400px;
}
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }
@keyframes slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.status-item.success { color: #b5e8d5; }
.status-item.error { color: #ffccc0; }
.status-item.saving { color: #fff0a8; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #424242; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #4f4f4f; }