:root {
  --green-900: #14382b;
  --green-700: #1f6f54;
  --green-600: #278066;
  --green-100: #eaf4ee;
  --green-50: #f4f9f6;
  --ink: #1f2430;
  --muted: #62707c;
  --muted-2: #8a96a3;
  --border: #e3e8ec;
  --bg: #f6f8f7;
  --card: #ffffff;
  --danger: #c0392b;
  --danger-bg: #fdecea;
  --warn: #b9770e;
  --warn-bg: #fdf3e0;
  --ok: #1f6f54;
  --ok-bg: #eaf4ee;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20,30,25,.06), 0 4px 14px rgba(20,30,25,.05);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: 14px; }

.app-shell { display: grid; grid-template-columns: 220px 1fr; grid-template-rows: 56px 1fr; grid-template-areas: "top top" "nav main"; min-height: 100vh; }

.topbar {
  grid-area: top; display: flex; align-items: center; gap: 12px; padding: 0 18px;
  background: var(--green-900); color: #fff; position: sticky; top: 0; z-index: 30;
}
.brand { font-weight: 800; font-size: 17px; letter-spacing: -.01em; }
.brand span { color: #a9d9c4; font-weight: 500; }
.topbar-spacer { flex: 1; }
.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; padding: 4px 8px; }

.sidenav {
  grid-area: nav; background: #fff; border-right: 1px solid var(--border); padding: 16px 10px;
  display: flex; flex-direction: column; gap: 2px; position: sticky; top: 56px; height: calc(100vh - 56px); overflow-y: auto;
}
.sidenav a { padding: 9px 12px; border-radius: 8px; color: var(--muted); font-size: 14px; font-weight: 500; }
.sidenav a:hover { background: var(--green-50); color: var(--green-900); }
.sidenav a.active { background: var(--green-100); color: var(--green-700); font-weight: 700; }
.nav-section { font-size: 10.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted-2); margin: 14px 12px 4px; font-weight: 700; }

.content { grid-area: main; padding: 22px 26px 60px; max-width: 1180px; width: 100%; }

.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.page-header h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -.01em; }
.page-header p { margin: 0; color: var(--muted); font-size: 13.5px; }
.header-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.card + .card { margin-top: 14px; }
.card h2, .card h3 { margin-top: 0; }

.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.stat-card .label { font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 700; }
.stat-card .value { font-size: 24px; font-weight: 800; margin-top: 6px; color: var(--green-900); }
.stat-card .sub { font-size: 12px; color: var(--muted-2); margin-top: 2px; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); padding: 8px 10px; border-bottom: 2px solid var(--border); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
.table-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.row-link:hover { background: var(--green-50); cursor: pointer; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 14px; border-radius: 9px; border: 1px solid var(--border); background: #fff; color: var(--ink); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .12s ease; white-space: nowrap; }
.btn:hover { border-color: #c9d2d8; background: #fafbfb; }
.btn-primary { background: var(--green-700); border-color: var(--green-700); color: #fff; }
.btn-primary:hover { background: var(--green-600); border-color: var(--green-600); }
.btn-danger { color: var(--danger); }
.btn-danger:hover { background: var(--danger-bg); border-color: var(--danger-bg); }
.btn-sm { padding: 6px 11px; font-size: 12.5px; }
.btn-icon { padding: 6px 9px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 11.5px; font-weight: 700; background: var(--green-100); color: var(--green-700); }
.badge-muted { background: #eef0f2; color: var(--muted); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-ok { background: var(--ok-bg); color: var(--ok); }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 14px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 5px; }
.form-field.span-2 { grid-column: span 2; }
@media (max-width: 640px) { .form-field.span-2 { grid-column: span 1; } }
.form-field label { font-size: 12px; font-weight: 700; color: var(--muted); }
.form-field .hint { font-size: 11px; color: var(--muted-2); }
input[type=text], input[type=number], input[type=date], input[type=time], input[type=email], input[type=tel], input[type=password], select, textarea {
  padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--ink); width: 100%;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--green-600); box-shadow: 0 0 0 3px rgba(39,128,102,.14); }
textarea { resize: vertical; min-height: 64px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.chip-select { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 5px 11px; border-radius: 999px; border: 1px solid var(--border); font-size: 12.5px; cursor: pointer; background: #fff; }
.chip.active { background: var(--green-700); border-color: var(--green-700); color: #fff; }

.search-bar { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.search-bar input[type=text] { max-width: 280px; }
.search-bar select { max-width: 200px; }

.modal-overlay { position: fixed; inset: 0; background: rgba(15,25,20,.45); display: flex; align-items: flex-start; justify-content: center; padding: 30px 16px; z-index: 100; overflow-y: auto; }
.modal { background: #fff; border-radius: 16px; width: 100%; max-width: 640px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.modal.modal-lg { max-width: 880px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h3 { margin: 0; font-size: 16px; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--muted); padding: 4px 8px; }
.modal-body { padding: 18px 20px; max-height: 70vh; overflow-y: auto; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

.ing-row { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
@media (max-width: 640px) { .ing-row { grid-template-columns: 1fr; } }

.toast-container { position: fixed; top: 16px; right: 16px; z-index: 200; display: flex; flex-direction: column; gap: 8px; }
.toast { background: var(--green-900); color: #fff; padding: 11px 16px; border-radius: 10px; font-size: 13.5px; box-shadow: var(--shadow); max-width: 320px; animation: toast-in .15s ease; }
.toast.error { background: var(--danger); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-6px);} to { opacity:1; transform:none; } }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tab-btn { padding: 10px 14px; border: none; background: none; cursor: pointer; font-size: 13.5px; font-weight: 600; color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap; }
.tab-btn.active { color: var(--green-700); border-color: var(--green-700); }

.progress-steps { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.progress-steps .step { padding: 6px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; background: #eef0f2; color: var(--muted); }
.progress-steps .step.done { background: var(--green-100); color: var(--green-700); }

.margin-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 760px) { .margin-cards { grid-template-columns: 1fr; } }
.margin-card { border: 2px solid var(--border); border-radius: var(--radius); padding: 14px 16px; cursor: pointer; background: #fff; }
.margin-card.selected { border-color: var(--green-700); background: var(--green-50); }
.margin-card .pct { font-size: 20px; font-weight: 800; color: var(--green-900); }
.margin-card dl { margin: 8px 0 0; font-size: 12.5px; }
.margin-card dl div { display: flex; justify-content: space-between; padding: 2px 0; }
.margin-card dt { color: var(--muted); }

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-state .icon { font-size: 34px; margin-bottom: 8px; }

.loading { padding: 40px; text-align: center; color: var(--muted); }

.diff-pos { color: var(--danger); font-weight: 700; }
.diff-neg { color: var(--green-700); font-weight: 700; }

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; grid-template-areas: "top" "main"; }
  .nav-toggle { display: block; }
  .sidenav { position: fixed; left: 0; top: 56px; bottom: 0; width: 240px; transform: translateX(-100%); transition: transform .18s ease; z-index: 40; box-shadow: 8px 0 24px rgba(0,0,0,.15); }
  .sidenav.open { transform: translateX(0); }
  .content { padding: 16px 14px 50px; }
  .page-header h1 { font-size: 19px; }
}

/* ---------- Autenticacion (Etapa 6) ---------- */
#app-shell[hidden], .auth-screen[hidden] { display: none; }
.auth-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--green-900); padding: 24px;
}
.auth-card {
  background: #fff; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,.25);
  width: 100%; max-width: 380px; padding: 28px 26px;
}
.auth-brand { font-weight: 800; font-size: 20px; letter-spacing: -.01em; color: var(--green-900); margin-bottom: 18px; text-align: center; }
.auth-brand span { color: var(--green-600); font-weight: 500; }
.auth-form h1 { font-size: 16px; margin: 0 0 4px; }
.auth-form p.auth-sub { font-size: 12.5px; color: var(--muted); margin: 0 0 18px; }
.auth-form .form-field { margin-bottom: 12px; }
.auth-form .btn { width: 100%; justify-content: center; margin-top: 6px; }
.auth-error { background: var(--danger-bg); color: var(--danger); border-radius: 8px; padding: 9px 12px; font-size: 13px; margin-bottom: 12px; }

.user-menu { position: relative; }
.user-menu-btn {
  display: flex; align-items: center; gap: 8px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  color: #fff; border-radius: 999px; padding: 5px 12px 5px 5px; font-size: 12.5px; font-weight: 600; cursor: pointer;
}
.user-menu-avatar { width: 24px; height: 24px; border-radius: 50%; background: var(--green-600); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 800; }
.user-menu-panel {
  position: absolute; right: 0; top: 40px; background: #fff; border-radius: 12px; box-shadow: var(--shadow); border: 1px solid var(--border);
  min-width: 220px; padding: 10px; z-index: 50; color: var(--ink);
}
.user-menu-panel .user-name { font-weight: 700; font-size: 13.5px; }
.user-menu-panel .user-email { font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.user-menu-panel button { width: 100%; text-align: left; }