/* ============================================================
   public/css/main.css - Diseño SaaS moderno
   ============================================================ */

/* --- Variables --- */
:root {
  --bg: #0d0f14;
  --bg2: #13161e;
  --bg3: #1a1e28;
  --border: #252a38;
  --border2: #2e3549;
  --accent: #6c63ff;
  --accent2: #8b83ff;
  --accent-glow: rgba(108,99,255,0.18);
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --sidebar-w: 250px;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --font: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}
a { color: var(--accent2); text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; }
ul { list-style: none; }

/* ---- Layout principal ---- */
.layout { display: flex; min-height: 100vh; }

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease;
}
.sidebar-logo {
  padding: 1.5rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 0 16px var(--accent-glow);
}
.sidebar-logo span {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.sidebar-nav { flex: 1; padding: 1rem 0; overflow-y: auto; }
.nav-section { padding: 0 0.75rem 0.5rem; }
.nav-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  padding: 0.5rem 0.5rem 0.25rem;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  color: var(--text2);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  text-decoration: none;
}
.nav-item:hover, .nav-item.active {
  background: var(--bg3);
  color: var(--text);
}
.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent2);
  border: 1px solid rgba(108,99,255,0.2);
}
.nav-item .nav-icon { width: 18px; text-align: center; opacity: 0.8; }

.sidebar-user {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.user-avatar {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.user-info { flex: 1; min-width: 0; }
.user-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role {
  font-size: 0.7rem;
  color: var(--text3);
  text-transform: capitalize;
}

/* ---- Main content ---- */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: 60px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}
.topbar-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text2);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

.page-content { padding: 1.5rem; flex: 1; max-width: 1200px; }

/* ---- Cards ---- */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}
.card-body { padding: 1.25rem; }

/* ---- Stat cards ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.stat-icon {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}
.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text3);
  font-weight: 500;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent2); color: #fff; }
.btn-secondary {
  background: var(--bg3);
  color: var(--text2);
  border: 1px solid var(--border2);
}
.btn-secondary:hover { background: var(--border); color: var(--text); }
.btn-danger {
  background: rgba(239,68,68,0.15);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.25);
}
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-success {
  background: rgba(34,197,94,0.15);
  color: var(--success);
  border: 1px solid rgba(34,197,94,0.25);
}
.btn-success:hover { background: var(--success); color: #fff; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.78rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Forms ---- */
.form-group { margin-bottom: 1.1rem; }
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 0.4rem;
}
.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.875rem;
  font-family: var(--font);
  transition: border-color 0.15s;
}
.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-control::placeholder { color: var(--text3); }
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control {
  cursor: pointer;
  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='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}
.form-hint { font-size: 0.72rem; color: var(--text3); margin-top: 0.3rem; }

/* Checkboxes */
.check-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.check-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text2);
  transition: all 0.15s;
}
.check-item input[type="checkbox"] { accent-color: var(--accent); }
.check-item:has(input:checked) {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent2);
}

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
thead th {
  padding: 0.75rem 1rem;
  background: var(--bg3);
  color: var(--text3);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
  vertical-align: middle;
}
tbody tr:hover td { background: var(--bg3); }
tbody tr:last-child td { border-bottom: none; }
.td-actions { display: flex; gap: 0.4rem; align-items: center; }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
}
.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-danger  { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-info    { background: rgba(59,130,246,0.15); color: var(--info); }
.badge-purple  { background: rgba(108,99,255,0.15); color: var(--accent2); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }

/* ---- Alerts / Flash ---- */
.alert {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.alert-success { background: rgba(34,197,94,0.12); border: 1px solid rgba(34,197,94,0.25); color: #4ade80; }
.alert-error   { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.25); color: #f87171; }
.alert-info    { background: rgba(59,130,246,0.12); border: 1px solid rgba(59,130,246,0.25); color: #60a5fa; }

/* ---- Login page ---- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 1.5rem;
}
.auth-box {
  width: 100%;
  max-width: 400px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow);
}
.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}
.auth-logo .logo-circle {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  box-shadow: 0 0 32px var(--accent-glow);
}
.auth-logo h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
}
.auth-logo p { font-size: 0.82rem; color: var(--text3); margin-top: 0.25rem; }

/* ---- TTS Tool ---- */
.tts-layout { display: grid; grid-template-columns: 1fr 280px; gap: 1.25rem; }
.credits-display {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.25);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent2);
}
.voice-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}
.voice-tab {
  padding: 0.6rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text3);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.voice-tab.active {
  color: var(--accent2);
  border-bottom-color: var(--accent);
}
.voice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
}
.voice-card {
  padding: 0.6rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 0.78rem;
  color: var(--text2);
  text-align: center;
}
.voice-card:hover { border-color: var(--accent); color: var(--text); }
.voice-card.selected {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent2);
}
.audio-player-wrap {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 10px;
  padding: 1rem;
  margin-top: 1rem;
  display: none;
}
.audio-player-wrap audio { width: 100%; margin-bottom: 0.75rem; }

/* ---- Reference accounts ---- */
.filter-bar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.filter-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent2);
}
.filter-btn img { width: 18px; height: 18px; border-radius: 4px; object-fit: cover; }

.accounts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.account-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.15s;
  text-decoration: none;
  color: var(--text);
}
.account-card:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.account-icons { display: flex; gap: 0.4rem; }
.account-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--bg3);
  border: 1px solid var(--border);
}
.account-icon-placeholder {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.account-info { flex: 1; min-width: 0; }
.account-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.account-meta {
  font-size: 0.73rem;
  color: var(--text3);
  margin-top: 0.1rem;
}
.account-arrow { color: var(--text3); font-size: 0.85rem; }

/* ---- Herramientas cards (dashboard usuario) ---- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.tool-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: all 0.2s;
  text-decoration: none;
  display: block;
}
.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  color: var(--text);
}
.tool-card-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
}
.tool-card-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.3rem;
}
.tool-card-desc { font-size: 0.78rem; color: var(--text3); }

/* ---- Page header ---- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.breadcrumb {
  font-size: 0.75rem;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.breadcrumb a { color: var(--text3); }
.breadcrumb a:hover { color: var(--text2); }

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text3);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 0.75rem; opacity: 0.5; }
.empty-state p { font-size: 0.85rem; }

/* ---- Grid 2 col ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }

/* ---- Spinner ---- */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Overlay sidebar mobile ---- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}

/* ---- Char counter ---- */
.char-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text3);
  margin-top: 0.3rem;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ---- Divider ---- */
.divider { border: none; border-top: 1px solid var(--border); margin: 1.25rem 0; }

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 900px) {
  .tts-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 250px; }

  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,0.5);
  }
  .sidebar-overlay.open { display: block; }

  .main-content { margin-left: 0; }
  .topbar-menu-btn { display: block; }

  .page-content { padding: 1rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .auth-box { padding: 2rem 1.25rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .accounts-grid { grid-template-columns: 1fr; }
}