/* ── Lumen – passend zu stefankleeberger.de ── */
* { box-sizing: border-box; }

:root {
  --bg:       #ffffff;
  --bg2:      #f8f8f8;
  --bg3:      #f2f2f2;
  --border:   #e0e0e0;
  --border2:  #d0d0d0;
  --text:     #222222;
  --muted:    #888888;
  --light:    #aaaaaa;
  --accent:   #333333;
  --gold:     #c4a832;
  --green:    #4a7c4e;
  --red:      #c0392b;
  --font:     -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --mono:     'Courier New', monospace;
}

.lumen-notice {
  padding: 14px 18px;
  background: #fffbee;
  border: 1px solid #e0d080;
  border-radius: 4px;
  font-size: 13px;
  color: #666;
  font-family: var(--font);
}

/* ── Password Gate ── */
.lumen-pw-gate {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 360px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.lumen-pw-box {
  text-align: center;
  padding: 48px 40px;
  max-width: 360px;
  width: 100%;
}

.lumen-logo {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 300;
  color: var(--text);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.lumen-tagline {
  font-family: var(--font);
  font-size: 10px;
  color: var(--light);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 32px;
}

.lumen-pw-subtitle {
  font-family: var(--font);
  font-size: 10px;
  color: var(--light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
}

.lumen-pw-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lumen-pw-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  text-align: center;
  outline: none;
  transition: border-color 0.15s;
}
.lumen-pw-input:focus { border-color: var(--accent); }

/* ── Main App ── */
.lumen-app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 82vh;
  min-height: 580px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  font-family: var(--font);
}

/* ── Sidebar ── */
.lumen-sidebar {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

.lumen-sidebar .lumen-logo { font-size: 16px; }
.lumen-sidebar .lumen-tagline { margin-bottom: 0; }

.lumen-sidebar-section {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--light);
  padding-top: 10px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

/* ── Transcript Area ── */
.lumen-transcript-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#lumen-transcript {
  width: 100%;
  height: 200px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 10px;
  padding: 10px;
  resize: none;
  outline: none;
  line-height: 1.6;
  transition: border-color 0.15s;
}
#lumen-transcript:focus { border-color: var(--accent); }
#lumen-transcript::placeholder { color: var(--border2); }

.lumen-upload-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lumen-upload-label {
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: 3px;
  color: var(--muted);
  font-size: 10px;
  font-family: var(--font);
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.lumen-upload-label:hover { border-color: var(--accent); color: var(--accent); }

.lumen-file-name {
  font-size: 10px;
  color: var(--light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Settings ── */
.lumen-settings-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lumen-settings-row label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--light);
}

.lumen-input-small {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--font);
  font-size: 12px;
  padding: 5px 8px;
  outline: none;
}
.lumen-input-small:focus { border-color: var(--accent); }

/* ── Buttons ── */
.lumen-btn {
  display: block;
  width: 100%;
  padding: 9px 14px;
  border-radius: 3px;
  font-family: var(--font);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.12s;
  text-align: center;
  text-decoration: none;
}

.lumen-btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.lumen-btn-primary:hover { background: #444; border-color: #444; }

.lumen-btn-new {
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border2);
}
.lumen-btn-new:hover { border-color: var(--accent); color: var(--accent); }

.lumen-btn-load {
  background: var(--bg);
  color: var(--green);
  border: 1px solid #c8dfc8;
}
.lumen-btn-load:hover { background: #f0f8f0; border-color: var(--green); }

.lumen-btn-secondary {
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border2);
}
.lumen-btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.lumen-btn-xs { width: auto; padding: 5px 10px; font-size: 9px; }

/* ── Chat Area ── */
.lumen-chat-area {
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.lumen-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.lumen-chat-messages::-webkit-scrollbar { width: 4px; }
.lumen-chat-messages::-webkit-scrollbar-track { background: transparent; }
.lumen-chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Welcome Screen ── */
.lumen-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex: 1;
  padding: 48px 24px;
  gap: 14px;
}

.lumen-welcome-logo {
  font-size: 28px;
  color: var(--border2);
  margin-bottom: 4px;
  font-family: var(--font);
}

.lumen-welcome-title {
  font-size: 22px;
  font-weight: 300;
  color: var(--text);
  letter-spacing: 0.05em;
}

.lumen-welcome-text {
  font-size: 13px;
  color: var(--muted);
  max-width: 400px;
  line-height: 1.8;
}

.lumen-welcome-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 8px;
  max-width: 520px;
}

.lumen-chip {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--muted);
  font-family: var(--font);
  font-size: 11px;
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.12s;
  text-align: left;
  letter-spacing: 0.01em;
}
.lumen-chip:hover { border-color: var(--accent); color: var(--accent); background: var(--bg); }

/* ── Messages ── */
.lumen-message {
  display: flex;
  gap: 14px;
  max-width: 820px;
}

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

.lumen-message-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
  letter-spacing: 0.05em;
  font-family: var(--font);
}

.lumen-message.user .lumen-message-avatar {
  background: var(--bg3);
  color: var(--muted);
  border: 1px solid var(--border);
}

.lumen-message.assistant .lumen-message-avatar {
  background: var(--bg2);
  color: var(--light);
  border: 1px solid var(--border);
  font-size: 12px;
}

.lumen-message-content {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text);
  max-width: calc(100% - 40px);
}

.lumen-message.user .lumen-message-content {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 3px 0 3px 3px;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 12px;
}

.lumen-message.assistant .lumen-message-content {
  color: var(--text);
}

.lumen-message.assistant .lumen-message-content strong {
  font-weight: 600;
  color: var(--text);
}
.lumen-message.assistant .lumen-message-content em {
  color: var(--muted);
  font-style: italic;
}
.lumen-message.assistant .lumen-message-content code {
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}

/* ── Transcript Indicator ── */
.lumen-transcript-loaded {
  background: #f5faf5;
  border-top: 1px solid #ddeedd;
  padding: 7px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  color: var(--green);
  letter-spacing: 0.02em;
}

.lumen-clear-transcript {
  background: none;
  border: none;
  color: var(--border2);
  cursor: pointer;
  font-size: 14px;
  padding: 0;
  line-height: 1;
  margin-left: auto;
}
.lumen-clear-transcript:hover { color: var(--red); }

/* ── Input Row ── */
.lumen-input-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 20px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.lumen-chat-input {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  padding: 9px 14px;
  resize: none;
  outline: none;
  max-height: 120px;
  overflow-y: auto;
  line-height: 1.5;
  transition: border-color 0.15s;
}
.lumen-chat-input:focus { border-color: var(--accent); background: var(--bg); }
.lumen-chat-input::placeholder { color: var(--border2); }

.lumen-send-btn {
  background: var(--text);
  border: none;
  border-radius: 3px;
  color: var(--bg);
  font-size: 13px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s;
  flex-shrink: 0;
}
.lumen-send-btn:hover { background: #444; }
.lumen-send-btn:disabled { background: var(--border); color: var(--light); cursor: default; }

/* ── Typing indicator ── */
.lumen-typing {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}
.lumen-typing span {
  width: 5px; height: 5px;
  background: var(--border2);
  border-radius: 50%;
  animation: lumenBounce 1.2s infinite;
}
.lumen-typing span:nth-child(2) { animation-delay: 0.2s; }
.lumen-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes lumenBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-5px); opacity: 1; }
}

/* ── Responsive ── */
@media (max-width: 680px) {
  .lumen-app { grid-template-columns: 1fr; height: auto; }
  .lumen-sidebar { border-right: none; border-bottom: 1px solid var(--border); }
  #lumen-transcript { height: 130px; }
  .lumen-chat-messages { padding: 20px 16px; }
}