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

body {
  background: #222;
  color: #eee;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Nav ── */

#nav {
  padding: .75em 1.5em;
  border-bottom: 1px solid #444;
  display: flex;
  align-items: center;
  gap: 2em;
  flex-shrink: 0;
}

.nav-brand {
  font-weight: bold;
  font-size: 1.1em;
}

.nav-links {
  display: flex;
  gap: 1em;
}

.nav-link {
  color: #888;
  text-decoration: none;
  padding: .25em .5em;
}

.nav-link:hover { color: #eee; }
.nav-link.active { color: #eee; border-bottom: 2px solid #eee; }

body, input, select, button, textarea {
  font-family: monospace;
  font-size: 1em;
  line-height: 1.5;
  color: #eee;
}

button, select, textarea {
  padding: .5em;
  border: 1px solid #444;
  background: #333;
  outline: none;
}

button:hover, select:hover, input:hover, textarea:hover {
  border-color: #666;
}

button {
  cursor: pointer;
  line-height: 1.25;
}

textarea {
  height: 8em;
  min-height: 8em;
}

.toggle {
  display: flex;
  align-items: center;
  gap: .5em;
  margin-left: auto;
}

.toggle label {
  cursor: pointer;
}

.session-rename {
  background: #222;
  border: 1px solid #888;
  outline: none;
}

/* ── Header ── */

header {
  padding: 1em 2em;
  border-bottom: 1px solid #444;
  display: flex;
  align-items: center;
  gap: 1em;
  flex-shrink: 0;
}

header h1 {
  font-size: 1em;
}

/* ── System Promp ── */

#systemPrompt {
  display: none;
  width: calc(100% - 2em);
  margin: 1em;
  padding: 1em;
}

#systemPrompt.visible { display: block; }

/* ── Meta Bar ── */

.meta-bar {
  padding: .5em;
  background: #111;
  border-bottom: 1px solid #333;
  flex-shrink: 0;
  min-height: 2.5em;
}

/* ── Chat ── */

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 1em;
  display: flex;
  flex-direction: column;
  gap: 1em;
}

.msg {
  max-width: 85%;
  padding: 1em;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user {
  align-self: flex-end;
  background: #333;
  border: 1px solid #444;
}

.msg.assistant {
  align-self: flex-start;
  background: #111;
  border: 1px solid #333;
}

.msg.system-info {
  align-self: center;
  border: 1px solid #444;
  text-align: center;
}

/* ── Cursor ── */

.msg .cursor {
  display: inline-block;
  width: .125em;
  height: 1em;
  background: #fff;
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
  margin-left: .125em;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* ── Tool Boxes ── */

.tool-box {
  align-self: center;
  padding: .5em;
  background: #333;
  border: 1px solid #444;
}

/* ── Input Area ── */

.input-area {
  border-top: 1px solid #333;
  display: flex;
  flex-shrink: 0;
  gap: 1em;
  padding: 1em;
}

.input-area textarea {
  flex: 1;
}

.input-area button {
  align-self: flex-end;
}

.input-area button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Archive ── */

.archive-container {
  display: flex;
  flex-direction: column;
  gap: 1em;
}

.archived { opacity: 0.6; }

/* ── Archive Button ── */

.archive-load-btn {
  display: block;
  margin-inline: auto;
}

/* ── Dashboard ── */

.dashboard {
  padding: 2em;
  overflow-y: auto;
}

.dashboard section {
  margin-bottom: 2em;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1em;
}

.section-header h2 {
  font-size: 1.1em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1em;
}

.card {
  background: #333;
  border: 1px solid #444;
  padding: 1em;
  display: flex;
  flex-direction: column;
  gap: .5em;
}

.card.clickable { cursor: pointer; }
.card.clickable:hover { border-color: #888; }

.card-icon { font-size: 2em; }
.card-title { font-weight: bold; }
.card-sub { color: #888; font-size: 0.85em; }

.card.placeholder {
  border-style: dashed;
  color: #666;
}

/* ── Session Page ── */

.session-page {
  display: flex;
  flex-direction: column;
}

.session-header {
  padding: .75em 1.5em;
  border-bottom: 1px solid #444;
  display: flex;
  align-items: center;
  gap: 1em;
  flex-shrink: 0;
}

.session-header h1 {
  font-size: 1em;
}

.back-btn {
  background: none;
  border: none;
  font-size: 1.2em;
  padding: .25em .5em;
}

.header-btn {
  font-size: 0.85em;
}

.editable-title {
  cursor: pointer;
}

.editable-title:hover {
  text-decoration: underline;
  text-decoration-style: dotted;
}

/* ── Placeholder Pages ── */

.placeholder-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1em;
  color: #888;
}

.placeholder-icon {
  font-size: 4em;
}