/* ═══════════════════════════════════════════════
   TOKENS & RESET
═══════════════════════════════════════════════ */
:root {
  --bg: #0a0b0d;
  --bg2: #10121a;
  --bg3: #171b26;
  --bg4: #1e2333;
  --border: #252b3d;
  --border2: #2e3650;
  --text: #e8eaf2;
  --text2: #8892a8;
  --text3: #55607a;
  --accent: #e8600a;
  --accent2: #c95008;
  --green: #2dd4a0;
  --red: #f05d5d;
  --blue: #4d9cf8;
  --purple: #9b72f5;
  --yellow: #ffd166;
  --shadow: 0 4px 24px rgba(0,0,0,.5);
  --radius: 10px;
  --mono: 'DM Mono', monospace;
  --sans: 'Syne', sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: var(--sans); background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }
button { cursor: pointer; font-family: var(--sans); }
input, select, textarea { font-family: var(--mono); }

/* ═══════════════════════════════════════════════
   LAYOUT
═══════════════════════════════════════════════ */
#app { display: flex; height: 100vh; overflow: hidden; }

/* SIDEBAR */
#sidebar {
  width: 220px; min-width: 220px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 0;
  z-index: 10;
}
.sidebar-brand {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand .logo {
  font-size: 18px; font-weight: 800; letter-spacing: -0.5px;
  color: var(--text);
}
.sidebar-brand .logo span { color: var(--accent); }
.sidebar-brand .sub { font-size: 10px; color: var(--text3); font-family: var(--mono); margin-top: 2px; text-transform: uppercase; letter-spacing: 1px; }

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.nav-section { padding: 8px 16px 4px; font-size: 9px; color: var(--text3); text-transform: uppercase; letter-spacing: 1.5px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  color: var(--text2); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all .15s; border: none; background: none; width: 100%; text-align: left;
  position: relative;
}
.nav-item:hover { color: var(--text); background: var(--bg3); }
.nav-item.active { color: var(--accent); background: linear-gradient(90deg, rgba(245,166,35,.08) 0%, transparent 100%); }
.nav-item.active::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); border-radius: 0 2px 2px 0; }
.nav-icon { font-size: 15px; width: 18px; text-align: center; }

.sidebar-footer { padding: 14px 20px; border-top: 1px solid var(--border); }
.sidebar-footer .version { font-size: 10px; color: var(--text3); font-family: var(--mono); }

/* MAIN */
#main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  height: 56px; min-height: 56px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 24px; gap: 16px;
}
.topbar-title { font-size: 17px; font-weight: 700; flex: 1; }
.topbar-badge {
  background: var(--bg3); border: 1px solid var(--border);
  padding: 4px 12px; border-radius: 20px; font-size: 11px; color: var(--text2); font-family: var(--mono);
}

#content { flex: 1; overflow-y: auto; padding: 24px; }

/* ═══════════════════════════════════════════════
   COMPONENTES BASE
═══════════════════════════════════════════════ */
.page { display: none; }
.page.active { display: block; animation: fadeIn .2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

/* Tarjetas KPI */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.kpi {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; position: relative; overflow: hidden;
  transition: border-color .15s;
}
.kpi:hover { border-color: var(--border2); }
.kpi::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; }
.kpi.green::before { background: var(--green); }
.kpi.accent::before { background: var(--accent); }
.kpi.red::before { background: var(--red); }
.kpi.blue::before { background: var(--blue); }
.kpi.purple::before { background: var(--purple); }
.kpi-label { font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.kpi-value { font-size: 22px; font-weight: 800; font-family: var(--mono); letter-spacing: -1px; }
.kpi-value.green { color: var(--green); }
.kpi-value.accent { color: var(--accent); }
.kpi-value.red { color: var(--red); }
.kpi-value.blue { color: var(--blue); }
.kpi-sub { font-size: 11px; color: var(--text3); margin-top: 4px; font-family: var(--mono); }

/* Tablas */
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin-bottom: 20px;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  font-weight: 700; font-size: 14px;
}
.card-body { padding: 20px; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: 1px; padding: 8px 12px; border-bottom: 1px solid var(--border); font-weight: 600; }
td { padding: 11px 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg3); }
.num { font-family: var(--mono); text-align: right; }
.mono { font-family: var(--mono); }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 3px 9px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge-green { background: rgba(45,212,160,.12); color: var(--green); }
.badge-red { background: rgba(240,93,93,.12); color: var(--red); }
.badge-yellow { background: rgba(255,209,102,.12); color: var(--yellow); }
.badge-blue { background: rgba(77,156,248,.12); color: var(--blue); }
.badge-accent { background: rgba(245,166,35,.12); color: var(--accent); }
.badge-gray { background: var(--bg3); color: var(--text2); }

/* Botones */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 17px; border-radius: 6px; font-size: 13px; font-weight: 600; border: none; transition: all .15s; }
.btn-primary { background: var(--accent); color: #0a0b0d; }
.btn-primary:hover { background: var(--accent2); }
.btn-ghost { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--border2); color: var(--text); }
.btn-danger { background: rgba(240,93,93,.15); color: var(--red); border: 1px solid rgba(240,93,93,.2); }
.btn-danger:hover { background: rgba(240,93,93,.25); }
.btn-sm { padding: 5px 10px; font-size: 11px; }
.btn-icon { padding: 6px 8px; }

/* Formularios */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 11px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.8px; font-family: var(--sans); font-weight: 600; }
.form-control {
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  padding: 8px 12px; border-radius: 6px; font-size: 13px; transition: border-color .15s; width: 100%;
}
.form-control:focus { outline: none; border-color: var(--accent); }
.form-control::placeholder { color: var(--text3); }
select.form-control { cursor: pointer; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 1000;
  display: none; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg2); border: 1px solid var(--border2); border-radius: 12px;
  width: 560px; max-width: 95vw; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity:0; transform: scale(.96); } to { opacity:1; transform: scale(1); } }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-title { font-size: 16px; font-weight: 700; }
.modal-body { padding: 24px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 24px; border-top: 1px solid var(--border); }

/* Toast */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 2000; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--bg3); border: 1px solid var(--border2); padding: 12px 18px; border-radius: 8px; font-size: 13px; display: flex; align-items: center; gap: 10px; box-shadow: var(--shadow); animation: toastIn .2s ease; min-width: 260px; }
@keyframes toastIn { from { opacity:0; transform: translateX(20px); } to { opacity:1; transform: translateX(0); } }
.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--red); }
.toast.info { border-left: 3px solid var(--blue); }

/* Toolbar */
.toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.search-box { position: relative; }
.search-box input { padding-left: 32px; width: 220px; }
.search-box::before { content: '🔍'; position: absolute; left: 10px; top: 50%; transform: translateY(-50%); font-size: 12px; }

/* Separador sección */
.section-title { font-size: 12px; color: var(--text3); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 14px; font-weight: 600; padding-bottom: 8px; border-bottom: 1px solid var(--border); }

/* Calculadora */
.calc-result { background: var(--bg3); border: 1px solid var(--border2); border-radius: var(--radius); padding: 20px; }
.calc-line { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.calc-line:last-child { border-bottom: none; }
.calc-line.total { font-weight: 700; font-size: 15px; padding-top: 12px; }
.calc-value { font-family: var(--mono); color: var(--text); }
.calc-value.green { color: var(--green); }
.calc-value.red { color: var(--red); }
.calc-value.accent { color: var(--accent); }

/* Mini chart bar */
.bar-chart { display: flex; align-items: flex-end; gap: 4px; height: 60px; }
.bar { flex: 1; background: var(--accent); opacity: .6; border-radius: 3px 3px 0 0; min-height: 4px; transition: opacity .15s; }
.bar:hover { opacity: 1; }
.bar.green { background: var(--green); }

/* Scroll */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* Responsive tabla */
.table-wrapper { overflow-x: auto; }
.th-sort { cursor: pointer; user-select: none; white-space: nowrap; }
.th-sort:hover { color: var(--accent); }
.sort-icon { font-size: 10px; opacity: 0.6; margin-left: 2px; }

/* Semáforo stock */
.stock-ok { color: var(--green); }
.stock-low { color: var(--yellow); }
.stock-empty { color: var(--red); }

  /* ═══ AI CHAT WIDGET ═══ */
  #ai-chat-btn {
    position: fixed; bottom: 24px; right: 24px; z-index: 9999;
    width: 56px; height: 56px; border-radius: 50%;
    background: linear-gradient(135deg, #ff6b00, #ff9500);
    border: none; cursor: pointer; font-size: 26px;
    box-shadow: 0 4px 20px rgba(255,107,0,0.45);
    transition: transform .2s, box-shadow .2s;
    display: flex; align-items: center; justify-content: center;
  }
  #ai-chat-btn:hover { transform: scale(1.08); box-shadow: 0 6px 28px rgba(255,107,0,0.6); }
  #ai-chat-panel {
    position: fixed; bottom: 90px; right: 24px; z-index: 9998;
    width: 360px; height: 520px;
    background: var(--card-bg, #1a1d2e); border: 1px solid var(--border, #2a2d3e);
    border-radius: 16px; display: flex; flex-direction: column;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
    animation: slideUp .25s ease;
  }
  @keyframes slideUp { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
  #ai-chat-header {
    padding: 14px 16px; border-bottom: 1px solid var(--border, #2a2d3e);
    display: flex; align-items: center; justify-content: space-between;
    border-radius: 16px 16px 0 0;
  }
  #ai-chat-header span { font-weight: 600; font-size: 15px; display: flex; align-items: center; gap: 8px; }
  #ai-chat-close {
    background: none; border: none; cursor: pointer; color: var(--text-secondary, #888);
    font-size: 18px; padding: 0; line-height: 1;
  }
  #ai-chat-close:hover { color: var(--text, #e8eaf2); }
  #ai-chat-messages {
    flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px;
    scrollbar-width: thin;
  }
  .ai-msg { max-width: 88%; padding: 10px 13px; border-radius: 12px; font-size: 13px; line-height: 1.5; }
  .ai-msg.user { align-self: flex-end; background: #ff6b00; color: #fff; border-radius: 12px 12px 3px 12px; }
  .ai-msg.bot  { align-self: flex-start; background: var(--hover-bg, #252838); border-radius: 12px 12px 12px 3px; }
  .ai-msg.thinking { color: var(--text-secondary, #888); font-style: italic; }
  #ai-chat-input-area {
    padding: 12px; border-top: 1px solid var(--border, #2a2d3e);
    display: flex; gap: 8px;
  }
  #ai-chat-input {
    flex: 1; background: var(--input-bg, #252838); border: 1px solid var(--border, #2a2d3e);
    border-radius: 8px; padding: 8px 12px; color: var(--text, #e8eaf2); font-size: 13px;
    outline: none;
  }
  #ai-chat-input:focus { border-color: #ff6b00; }
  .ai-sug-btn {
    background: var(--bg3, #23262f); border: 1px solid var(--border, #333); color: var(--text2, #adb5bd);
    font-size: 11px; padding: 5px 10px; border-radius: 14px; cursor: pointer; white-space: nowrap;
    transition: all 0.15s;
  }
  .ai-sug-btn:hover { background: #ff6b00; color: #fff; border-color: #ff6b00; }
  #ai-send-btn {
    background: #ff6b00; border: none; border-radius: 8px;
    padding: 8px 14px; color: #fff; cursor: pointer; font-size: 18px;
    transition: background .15s;
  }
  #ai-send-btn:hover { background: #e05e00; }
  #ai-send-btn:disabled { opacity: .5; cursor: not-allowed; }
  .ai-msg.bot strong { color: #ff9500; }

  .ai-excel-btn {
    display: block; margin: 4px 0; padding: 9px 14px;
    background: linear-gradient(135deg, #1d6f42, #2a9d5c);
    color: #fff !important; text-decoration: none;
    border-radius: 8px; font-size: 13px; font-weight: 600;
    text-align: center; transition: opacity .15s;
  }
  .ai-excel-btn:hover { opacity: .85; }

  @media (max-width: 860px) {
    #page-calculadora > div:last-child { grid-template-columns: 1fr !important; }
    #ml-conectado > div:first-child { grid-template-columns: 1fr !important; }
    #page-config > div { grid-template-columns: 1fr !important; }
    /* herramientas eliminada */
  }