/* ============ APP SHELL ============ */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr 420px;
  height: 100vh;
  position: relative;
  z-index: 1;
}

/* Ambient background */
.ambient { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.grid-pattern {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 80%);
}
.blob { position: absolute; width: 500px; height: 500px; border-radius: 50%; filter: blur(120px); opacity: .25; }
.blob--purple { background: radial-gradient(circle, var(--purple), transparent 70%); top: -150px; left: -100px; animation: drift-1 26s ease-in-out infinite alternate; }
.blob--blue { background: radial-gradient(circle, var(--blue), transparent 70%); bottom: -150px; right: -100px; animation: drift-2 30s ease-in-out infinite alternate; }

/* ============ MAIN AREA ============ */
.main-area {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-width: 0;
  position: relative;
  z-index: 1;
}

/* ============ SIDEBAR ============ */
.sidebar {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: rgba(17, 17, 32, .85);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(20px);
  z-index: 10;
  position: relative;
}
.sidebar-brand {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background .2s;
}
.sidebar-brand:hover { background: var(--hover); }
.brand-icon {
  width: 32px; height: 32px;
  background: var(--grad);
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  box-shadow: 0 0 20px rgba(124, 58, 237, .3);
  flex-shrink: 0;
}
.brand-icon svg { width: 20px; height: 20px; }
.brand-info { min-width: 0; }
.brand-name { font-size: 13px; font-weight: 700; letter-spacing: -.01em; }
.brand-sub { font-size: 9px; font-weight: 500; color: var(--text-mute); font-family: var(--mono); letter-spacing: .04em; }

/* File tree */
.sidebar-section { padding: 12px 0; }
.sidebar-section-title {
  padding: 0 16px 8px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--text-dim);
}
.file-tree { flex: 1; overflow-y: auto; padding: 0 8px; }
.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  font-size: 12px;
  color: var(--text-2);
  cursor: pointer;
  transition: background .15s, color .15s;
  animation: fadeInLeft .3s var(--ease) both;
  width: 100%;
  text-align: left;
}
.file-item:hover { background: var(--hover); color: var(--text); }
.file-item.active { background: rgba(124,58,237,.12); color: #fff; border: 1px solid rgba(124,58,237,.2); }
.file-icon { font-size: 14px; flex-shrink: 0; }
.file-name { font-family: var(--mono); font-size: 11.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Agent steps */
.agent-steps { padding: 4px 8px; display: flex; flex-direction: column; gap: 4px; max-height: 280px; overflow-y: auto; }
.agent-step {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: var(--r-sm);
  font-size: 11px; color: var(--text-2);
  animation: fadeIn .25s var(--ease) both;
  background: rgba(255,255,255,.02);
}
.step-icon { width: 18px; height: 18px; display: grid; place-items: center; border-radius: 50%; font-size: 10px; flex-shrink: 0; }
.step-icon.running { background: rgba(124,58,237,.2); color: var(--purple-light); animation: pulse 1.5s ease infinite; }
.step-icon.success { background: rgba(16,185,129,.15); color: var(--ok); }
.step-icon.failed { background: rgba(239,68,68,.15); color: var(--err); }
.step-detail { font-family: var(--mono); font-size: 10px; color: var(--text-mute); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Status */
.sidebar-footer {
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
  font-size: 10px; color: var(--text-mute); font-family: var(--mono);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0;
}
.status-dot.online { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.status-dot.demo { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.status-dot.connecting { background: var(--text-dim); }

/* ============ EDITOR ============ */
.editor {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: rgba(10, 10, 18, .6);
}
.editor-tabs {
  display: flex;
  align-items: center;
  height: 38px;
  border-bottom: 1px solid var(--border);
  padding: 0 8px;
  gap: 2px;
  overflow-x: auto;
  flex-shrink: 0;
  background: rgba(17, 17, 32, .5);
}
.editor-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 0 14px; height: 100%;
  font-size: 11.5px; font-family: var(--mono);
  color: var(--text-mute);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .15s, border-color .15s;
  cursor: pointer;
}
.editor-tab:hover { color: var(--text-2); }
.editor-tab.active { color: var(--text); border-bottom-color: var(--purple); }
.editor-tab .tab-icon { font-size: 12px; }

.editor-content {
  flex: 1;
  overflow: auto;
  padding: 16px 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  counter-reset: line;
}

.code-line {
  display: flex;
  padding: 0 16px;
  min-height: 22px;
  animation: line-appear .2s var(--ease) both;
}
.code-line:hover { background: rgba(255,255,255,.02); }
.line-number {
  width: 48px;
  text-align: right;
  padding-right: 16px;
  color: var(--text-dim);
  font-size: 12px;
  user-select: none;
  flex-shrink: 0;
}
.line-content {
  flex: 1;
  white-space: pre;
  overflow-x: auto;
  color: var(--text-2);
}

/* Welcome state */
.editor-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
  gap: 16px;
}
.welcome-logo {
  width: 80px; height: 80px;
  background: var(--grad);
  border-radius: 20px;
  display: grid; place-items: center;
  box-shadow: 0 16px 48px rgba(124,58,237,.3);
  animation: float 5s ease-in-out infinite;
}
.welcome-logo svg { width: 44px; height: 44px; color: #fff; }
.welcome-title { font-size: 28px; font-weight: 700; letter-spacing: -.02em; }
.welcome-sub { font-size: 14px; color: var(--text-2); max-width: 420px; line-height: 1.6; }

/* Generating overlay */
.generating-indicator {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  background: rgba(124,58,237,.1);
  border-bottom: 1px solid rgba(124,58,237,.2);
  font-size: 12px; color: var(--purple-light);
  font-family: var(--mono);
}
.gen-spinner { width: 14px; height: 14px; border: 2px solid rgba(124,58,237,.3); border-top-color: var(--purple); border-radius: 50%; animation: spin .8s linear infinite; }

/* ============ PREVIEW ============ */
.preview-panel {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: rgba(14, 14, 22, .9);
  border-left: 1px solid var(--border);
  backdrop-filter: blur(20px);
  z-index: 5;
  position: relative;
}
.preview-header {
  height: 38px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.preview-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .1em; color: var(--text-mute);
  display: flex; align-items: center; gap: 8px;
}
.preview-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.preview-actions { display: flex; gap: 4px; }
.preview-btn {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: var(--r-xs);
  color: var(--text-mute);
  transition: background .15s, color .15s;
}
.preview-btn:hover { background: var(--hover); color: var(--text); }
.preview-btn svg { width: 14px; height: 14px; }

.preview-frame-wrap { flex: 1; position: relative; background: #fff; }
.preview-frame { width: 100%; height: 100%; border: 0; background: #fff; }
.preview-empty {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--bg-1); gap: 12px; text-align: center;
}
.preview-empty-icon {
  width: 48px; height: 48px; border-radius: var(--r-md);
  background: var(--grad-soft);
  border: 1px solid rgba(124,58,237,.2);
  display: grid; place-items: center;
  font-size: 20px; color: var(--purple-light);
}
.preview-empty p { font-size: 12px; color: var(--text-mute); }
.preview-empty p:last-child { font-size: 11px; color: var(--text-dim); max-width: 200px; }

/* Console */
.console-panel {
  height: 120px;
  border-top: 1px solid var(--border);
  display: flex; flex-direction: column;
  flex-shrink: 0;
}
.console-header {
  padding: 6px 14px;
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .1em; color: var(--text-dim);
  background: rgba(255,255,255,.02);
  border-bottom: 1px solid var(--border);
}
.console-body {
  flex: 1; overflow-y: auto; padding: 8px 14px;
  font-family: var(--mono); font-size: 11px; line-height: 1.6;
  color: var(--ok);
}
.console-body .error { color: var(--err); }

/* ============ PROMPT BAR ============ */
.prompt-bar {
  padding: 12px 16px 16px;
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  background: rgba(17,17,32,.7);
  backdrop-filter: blur(16px);
}
.prompt-input-wrap {
  display: flex; align-items: flex-end; gap: 8px;
  background: rgba(20,20,36,.9);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  padding: 10px 14px;
  transition: border-color .2s, box-shadow .2s;
}
.prompt-input-wrap:focus-within {
  border-color: rgba(124,58,237,.5);
  box-shadow: 0 0 0 3px rgba(124,58,237,.1), 0 20px 50px -20px rgba(124,58,237,.4);
}
.prompt-input {
  flex: 1; font-size: 13.5px; line-height: 1.5;
  color: var(--text); background: transparent;
  resize: none; max-height: 120px; min-height: 20px;
  font-family: var(--sans);
}
.prompt-input::placeholder { color: var(--text-mute); }
.prompt-send {
  width: 34px; height: 34px;
  background: var(--grad);
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: #fff; flex-shrink: 0;
  transition: filter .15s, transform .1s, box-shadow .2s;
  box-shadow: 0 4px 14px -4px rgba(124,58,237,.4);
}
.prompt-send:hover:not(:disabled) { filter: brightness(1.1); transform: translateY(-1px); }
.prompt-send:disabled { opacity: .3; cursor: not-allowed; }
.prompt-send svg { width: 16px; height: 16px; }
.prompt-stop {
  width: 34px; height: 34px;
  background: var(--err);
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: #fff; flex-shrink: 0;
  animation: pulse 1.5s ease infinite;
}
.prompt-stop svg { width: 14px; height: 14px; }
.prompt-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 4px 0;
  font-size: 10px; color: var(--text-dim); font-family: var(--mono);
}

/* ============ PLAN MODAL ============ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: grid; place-items: center;
  animation: fadeIn .2s var(--ease);
}
.modal-card {
  background: var(--panel);
  border: 1px solid var(--border-2);
  border-radius: var(--r-xl);
  width: min(480px, 90%);
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
  animation: pop-in .25s var(--ease);
  overflow: hidden;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; font-weight: 600; }
.modal-close {
  width: 32px; height: 32px; display: grid; place-items: center;
  border-radius: var(--r-sm); color: var(--text-mute);
  transition: background .15s;
}
.modal-close:hover { background: var(--hover); }
.modal-body { padding: 20px; display: flex; flex-direction: column; gap: 18px; }
.modal-field label { display: block; font-size: 12px; font-weight: 500; color: var(--text-2); margin-bottom: 8px; }
.modal-options { display: flex; flex-wrap: wrap; gap: 6px; }
.modal-option {
  padding: 7px 14px; border-radius: var(--r-md);
  font-size: 12px; font-weight: 500;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  transition: all .15s;
}
.modal-option:hover { background: rgba(255,255,255,.08); color: var(--text); }
.modal-option.selected { background: rgba(124,58,237,.15); border-color: rgba(124,58,237,.4); color: #fff; }
.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: 8px;
}
.modal-btn {
  padding: 8px 18px; border-radius: var(--r-md);
  font-size: 12.5px; font-weight: 500;
  transition: all .15s;
}
.modal-btn.ghost { color: var(--text-mute); border: 1px solid var(--border-2); }
.modal-btn.ghost:hover { background: var(--hover); }
.modal-btn.primary {
  background: var(--grad); color: #fff;
  box-shadow: 0 6px 20px -6px rgba(124,58,237,.4);
}
.modal-btn.primary:hover { filter: brightness(1.1); }

/* Settings modal fields */
.settings-field { display: flex; flex-direction: column; gap: 6px; }
.settings-field label { font-size: 12px; font-weight: 500; color: var(--text-2); }
.settings-input {
  padding: 9px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-2);
  background: var(--bg-1);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  transition: border-color .2s, box-shadow .2s;
}
.settings-input:focus {
  border-color: rgba(124,58,237,.5);
  box-shadow: 0 0 0 3px rgba(124,58,237,.1);
}
.settings-hint { font-size: 10.5px; color: var(--text-dim); line-height: 1.5; }
.settings-range-wrap { display: flex; align-items: center; gap: 12px; }
.settings-range {
  flex: 1; -webkit-appearance: none; appearance: none;
  height: 4px; background: var(--bg-1); border-radius: 2px; border: 1px solid var(--border);
}
.settings-range::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  border-radius: 50%; background: var(--grad);
  border: 2px solid #fff; cursor: pointer;
  box-shadow: 0 0 0 2px rgba(124,58,237,.2);
}
.settings-range-val {
  font-family: var(--mono); font-size: 12px;
  color: var(--purple-light); min-width: 42px; text-align: right;
}

/* ============ TOASTS ============ */
.toasts {
  position: fixed; bottom: 20px; right: 20px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 200; pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  border-radius: var(--r-md);
  background: var(--panel-2);
  border: 1px solid var(--border-2);
  box-shadow: 0 16px 32px rgba(0,0,0,.4);
  font-size: 12.5px; color: var(--text);
  animation: toast-in .3s var(--ease);
  min-width: 220px; max-width: 340px;
}
.toast-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.toast-dot.success { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.toast-dot.error { background: var(--err); box-shadow: 0 0 8px var(--err); }
.toast-dot.info { background: var(--info); box-shadow: 0 0 8px var(--info); }

/* ============ RESPONSIVE ============ */
@media (max-width: 1200px) { .app-shell { grid-template-columns: var(--sidebar-w) 1fr 360px; } }
@media (max-width: 1024px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .preview-panel { display: none; }
}