:root {
  --bg-dark: #0f0f14;
  --card-bg: #0b0b0e;
  --panel-bg: #12121a;
  --input-bg: #181822;
  --border-color: #1a1a24;
  --text-main: #ffffff;
  --text-muted: #8e8e9f;
  --accent-color: #00d2ff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.app-window {
  width: 100%;
  max-width: 440px;
  height: 85vh;
  max-height: 700px;
  background: var(--card-bg);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
}

.screen {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

/* Setup Screen */
.header {
  padding: 32px 24px 16px;
  text-align: center;
}

.header h1 {
  font-size: 24px;
  font-weight: 700;
}

.header p {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 6px;
}

.form-group {
  padding: 0 24px 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  font-weight: 600;
}

.input-field {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--input-bg);
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.input-field:focus {
  border-color: var(--accent-color);
}

.character-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.char-card {
  width: 100%;
  padding: 14px 16px;
  background: var(--panel-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.char-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-1px);
}

.char-badge {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* Chat Screen */
.top-bar {
  height: 56px;
  background: var(--panel-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.back-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 6px;
}

.back-btn:hover {
  color: var(--text-main);
}

.active-title {
  font-weight: 700;
  font-size: 16px;
}

.chat-messages {
  flex: 1;
  padding: 20px 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
}

.msg-row {
  display: flex;
  gap: 10px;
  max-width: 82%;
  align-items: flex-end;
}

.msg-row.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.msg-row.ai {
  align-self: flex-start;
}

.avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #000;
  flex-shrink: 0;
}

.bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.45;
  word-break: break-word;
}

.user .bubble {
  background: var(--accent-color);
  color: #000;
  border-bottom-right-radius: 4px;
}

.ai .bubble {
  background: var(--panel-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.input-bar {
  padding: 14px 16px;
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.input-pill {
  display: flex;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 4px 6px 4px 16px;
}

.input-pill input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
}

.input-pill button {
  border: none;
  border-radius: 18px;
  padding: 8px 18px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  color: #000;
  transition: opacity 0.2s;
}

.input-pill button:hover {
  opacity: 0.9;
}