:root {
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-border: #e0e0e4;
  --color-text: #1d1d1f;
  --color-text-muted: #86868b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-bubble-user: #2563eb;
  --color-bubble-gemini: #f0f0f3;
  --radius-md: 16px;
  --radius-lg: 20px;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.screen {
  width: 100%;
  height: 100dvh;
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
}

.hidden { display: none !important; }
.hidden-svg { display: none; }

/* ─── Auth Screen ────────────────────────────────────────────────────────── */

.auth-screen {
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #f0f4ff, var(--color-bg));
}

.auth-card {
  width: 100%;
  max-width: 380px;
  padding: 40px 32px;
}

.auth-header {
  text-align: center;
  margin-bottom: 16px;
}

.auth-logo {
  width: 280px;
  max-width: 90%;
  height: auto;
  border-radius: 24px;
  object-fit: contain;
  margin: 0 auto 0;
  display: block;
}

.auth-header p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 0;
}

/* ─── Forms ──────────────────────────────────────────────────────────────── */

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-hint {
  font-size: 11px;
  color: var(--color-text-muted);
  opacity: 0.7;
  margin-top: 2px;
}

.form-group input,
.form-group select {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-primary);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2386868b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.btn-primary {
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--color-primary);
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
  font-family: inherit;
}

.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.auth-error {
  color: var(--color-danger);
  font-size: 13px;
  text-align: center;
}

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.auth-toggle {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--color-text-muted);
  display: none;
}

.link-btn {
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  padding: 0;
  font-family: inherit;
}

.link-btn:hover { text-decoration: underline; }

/* ─── Tabs ───────────────────────────────────────────────────────────────── */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.tab {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.tab:hover { color: var(--color-text); }

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

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

.tab-content.hidden { display: none; }

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.header-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  color: white;
  flex-shrink: 0;
}

.header-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }

.header-name { font-size: 16px; font-weight: 600; color: var(--color-text); }

.header-sub { font-size: 13px; color: var(--color-primary); margin-top: 2px; }

.header-meta { display: flex; align-items: center; gap: 2px; margin-top: 2px; }

.header-status { font-size: 13px; color: var(--color-text-muted); transition: color 0.3s; }

.header-actions { display: flex; gap: 4px; }

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}

.icon-btn:hover { background: var(--color-border); color: var(--color-text); }

/* ─── Transcript ─────────────────────────────────────────────────────────── */

.transcript {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.transcript-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 14px;
  text-align: center;
  padding: 20px;
}

.bubble {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  line-height: 1.45;
  word-wrap: break-word;
  animation: bubbleIn 0.25s ease-out;
}

.bubble.user {
  align-self: flex-end;
  background-color: var(--color-bubble-user);
  color: white;
  border-bottom-right-radius: 6px;
}

.bubble.gemini {
  align-self: flex-start;
  background-color: var(--color-bubble-gemini);
  color: var(--color-text);
  border-bottom-left-radius: 6px;
}

@keyframes bubbleIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */

.footer {
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.call-btn {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: none;
  background-color: var(--color-primary);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.4);
}

.call-btn:hover { transform: scale(1.06); background-color: var(--color-primary-hover); }
.call-btn:active { transform: scale(0.96); }

.call-btn.connected {
  background-color: var(--color-danger);
  box-shadow: 0 2px 12px rgba(239, 68, 68, 0.4);
  animation: pulse 2s ease-in-out infinite;
}

.call-btn.connected:hover { background-color: var(--color-danger-hover); }

.call-btn.connecting {
  background-color: #eab308;
  box-shadow: 0 2px 12px rgba(234, 179, 8, 0.4);
  animation: pulseConnecting 0.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 2px 12px rgba(239, 68, 68, 0.4); }
  50% { box-shadow: 0 2px 24px rgba(239, 68, 68, 0.7), 0 0 0 8px rgba(239, 68, 68, 0.15); }
}

@keyframes pulseConnecting {
  0%, 100% { box-shadow: 0 2px 12px rgba(234, 179, 8, 0.4); }
  50% { box-shadow: 0 2px 24px rgba(234, 179, 8, 0.7), 0 0 0 8px rgba(234, 179, 8, 0.15); }
}

/* ─── Modal ──────────────────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  width: 90%;
  max-width: 380px;
  animation: modalIn 0.2s ease-out;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 { font-size: 17px; font-weight: 600; }

.modal-close { font-size: 20px; }

.modal-dialog {
  max-width: 360px;
  padding: 20px 24px;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* ─── Admin Table ────────────────────────────────────────────────────────── */

.admin-table-wrap { max-height: 400px; overflow-y: auto; }

.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th { text-align: left; padding: 8px 6px; color: var(--color-text-muted); font-weight: 500; border-bottom: 1px solid var(--color-border); }
.admin-table td { padding: 8px 6px; border-bottom: 1px solid var(--color-border); }

.saldo-add { display: flex; gap: 4px; align-items: center; }
.saldo-action { padding: 4px 4px; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-bg); color: var(--color-text); font-size: 12px; font-family: inherit; outline: none; cursor: pointer; }
.saldo-input { width: 60px; padding: 4px 6px; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-bg); color: var(--color-text); font-size: 12px; font-family: inherit; outline: none; }
.saldo-input:focus, .saldo-action:focus { border-color: var(--color-primary); }

.btn-small { padding: 4px 10px; border: none; border-radius: 6px; background: var(--color-primary); color: white; font-size: 12px; font-weight: 600; cursor: pointer; font-family: inherit; }
.btn-small:hover { background: var(--color-primary-hover); }

.btn-tiny { padding: 2px 6px; border: none; border-radius: 4px; background: var(--color-primary); color: white; font-size: 11px; cursor: pointer; font-family: inherit; margin-left: 4px; }
.btn-tiny:hover { background: var(--color-primary-hover); }
.btn-edit-nombre { background: transparent; color: var(--color-text-muted); padding: 2px 4px; margin-left: 4px; }
.btn-edit-nombre:hover { background: var(--color-border); color: var(--color-text); }
.btn-save-nombre { margin-left: 4px; }
.actions-col { width: 60px; white-space: nowrap; }
.nombre-display { font-size: 13px; }
.nombre-input { width: 110px; padding: 4px 6px; border: 1px solid var(--color-primary); border-radius: 6px; background: var(--color-bg); color: var(--color-text); font-size: 12px; font-family: inherit; outline: none; }

.transcript::-webkit-scrollbar { width: 4px; }
.transcript::-webkit-scrollbar-track { background: transparent; }
.transcript::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }

/* ─── Conversations List ─────────────────────────────────────────────────── */

.conversations-list-wrap {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.conversations-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 14px;
  text-align: center;
  padding: 40px 20px;
}

.conv-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.conv-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: 12px;
  cursor: pointer;
  transition: background-color 0.15s;
  gap: 8px;
}

.conv-item:hover {
  background-color: var(--color-bg);
}

.conv-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.btn-resume {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: none;
  background: var(--color-primary);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.btn-resume:hover {
  background: var(--color-primary-hover);
}

.conv-item-info {
  min-width: 0;
  flex: 1;
}

.conv-item-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conv-item-date {
  font-size: 12px;
  color: var(--color-text-muted);
}

.conv-item-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 3px;
}

.conv-item-cost {
  font-size: 11px;
  color: var(--color-primary);
  font-weight: 500;
}

/* ─── Conversation Detail ────────────────────────────────────────────────── */

.detail-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
}

.bubble-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}

.bubble-time {
  font-size: 10px;
  opacity: 0.6;
}

.bubble-cost {
  font-size: 10px;
  opacity: 0.5;
  font-weight: 500;
}

.bubble-sender {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.7;
  margin-bottom: 3px;
}

/* ─── Editable title ─────────────────────────────────────────────────────── */

#detail-title[contenteditable="true"] {
  outline: 2px solid var(--color-primary);
  border-radius: 6px;
  padding: 2px 6px;
  margin: -2px -6px;
  background: var(--color-bg);
  cursor: text;
}

#detail-title {
  cursor: pointer;
  transition: opacity 0.15s;
}

#detail-title:hover {
  opacity: 0.7;
}

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

.detail-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}