/* ============================================================
   Nutrimetría · base.css
   Tokens, reset, tipografía, shell de layout (sidebar + topbar)
   ============================================================ */

:root {
  /* ── Marca ──────────────────────────────────────────────── */
  --ink:              #123638;
  --green:            #0B4B4F;
  --green-dark:       #073B3F;
  --green-darker:     #0B4B4F;
  --green-light:      #DDF4F2;
  --green-container:  #A7DADC;
  --green-soft:       #F2FAF9;

  --cream:            #f9ebd0;
  --cream-soft:       #fdf6ea;
  --cream-line:       #f0e2c4;
  --cream-deep:       #b07d2f;

  --coral:            #E86F8D;
  --coral-dark:       #D14F70;

  /* ── Superficies ────────────────────────────────────────── */
  --canvas:           #F6FBFA;
  --card:             #FFFFFF;
  --input-bg:         #f4f5f7;
  --border:           #ECEDEF;
  --border-strong:    #DCDEE2;

  /* ── Texto ──────────────────────────────────────────────── */
  --text:             #123638;
  --text-sec:         #6D8587;
  --label:             #7E9496;

  /* ── Estado ─────────────────────────────────────────────── */
  --ok:               #2E7D32;
  --ok-bg:            #E8F5E9;
  --warn:             #E08600;
  --warn-bg:          #FFF6E5;
  --danger:           #C62828;
  --danger-bg:        #FDECEA;
  --info:             #1565C0;
  --info-bg:          #E7F0FB;

  /* ── Tipografía ─────────────────────────────────────────── */
  --font:             'Roboto', system-ui, -apple-system, sans-serif;
  --font-slab:        'Roboto', system-ui, -apple-system, sans-serif;
  --font-mono:        'Roboto Mono', ui-monospace, monospace;

  /* ── Forma ──────────────────────────────────────────────── */
  --radius-sm:        12px;
  --radius:           18px;
  --radius-lg:        24px;
  --radius-pill:      50px;

  --shadow-sm:        0 1px 2px rgba(20,20,25,.04);
  --shadow:           0 2px 12px rgba(20,20,25,.05), 0 1px 3px rgba(20,20,25,.03);
  --shadow-md:        0 12px 32px rgba(20,20,25,.07);

  --sidebar-w:        272px;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--canvas);
  color: var(--text);
  line-height: 1.45;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img { max-width: 100%; display: block; }

/* ── Shell de layout (sidebar + contenido) ─────────────── */
.app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.content {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  transition: margin-left .25s ease;
}

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px 16px;
  overflow-y: auto;
  z-index: 60;
  transition: transform .25s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 4px 8px 20px;
  color: inherit;
}
.brand-mark { width: 36px; height: 36px; flex-shrink: 0; display: block; }
.brand-text { line-height: 1.05; }
.brand-name {
  font-family: var(--font-slab);
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
  white-space: nowrap;
}
.brand-tag {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--label);
  margin-top: 2px;
}

.nav-group-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  color: var(--label);
  padding: 14px 12px 6px;
}

.nav { display: flex; flex-direction: column; gap: 2px; }

/* Categoría (grupo expandible) */
.nav-group { display: flex; flex-direction: column; }

.nav-group-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  background: transparent;
  border-radius: 11px;
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background .14s, color .14s;
}
.nav-group-toggle:hover { background: var(--green-soft); color: var(--green-darker); }
.nav-group-toggle .ngt-icon {
  width: 22px; text-align: center; font-size: 14px; color: var(--green-dark); flex-shrink: 0;
}
.nav-group-toggle .ngt-label { flex: 1; text-align: left; }
.nav-group-toggle .ngt-count {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--label);
  background: var(--input-bg);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
}
.nav-group-toggle .ngt-chevron {
  font-size: 11px;
  color: var(--label);
  transition: transform .18s ease;
  flex-shrink: 0;
}
.nav-group.open .nav-group-toggle .ngt-chevron { transform: rotate(180deg); }
.nav-group.open .nav-group-toggle { color: var(--green-darker); }

.nav-group-items {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .2s ease;
}
.nav-group-items > div { overflow: hidden; }
.nav-group.open .nav-group-items { grid-template-rows: 1fr; }

.nav-subitems {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 2px 0 6px 20px;
  border-left: 1.5px solid var(--border);
  margin: 2px 0 2px 22px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--text-sec);
  font-size: 13.5px;
  font-weight: 500;
  transition: background .14s, color .14s;
  cursor: pointer;
}
.nav-link i { width: 16px; text-align: center; font-size: 12.5px; color: var(--label); }
.nav-link:hover { background: var(--green-soft); color: var(--green-darker); }
.nav-link:hover i { color: var(--green-dark); }

.nav-link.active {
  background: var(--green);
  color: #fff;
  box-shadow: 0 10px 22px rgba(11,75,79,.18);
}
.nav-link.active i { color: #fff; }

.nav-group.empty .nav-group-toggle { cursor: default; opacity: .55; }
.nav-group.empty .nav-group-toggle:hover { background: transparent; color: var(--text); }
.nav-group.empty .ngt-chevron { display: none; }

.sidebar-foot {
  margin-top: auto;
  padding: 13px;
  background: var(--green-soft);
  border: 1px solid var(--green-container);
  border-radius: var(--radius);
}
.sidebar-foot .sf-title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--green-darker);
  margin-bottom: 3px;
}
.sidebar-foot .sf-text {
  font-size: 11px;
  color: var(--text-sec);
  line-height: 1.4;
}
.sidebar-foot .return-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--green-dark);
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(18,54,56,.35);
  z-index: 55;
}
.sidebar-backdrop.open { display: block; }

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246,251,250,.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 18px 36px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.topbar-titles { min-width: 0; }
.topbar h1 {
  font-family: var(--font-slab);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
  line-height: 1.15;
}
.topbar-sub { font-size: 12.5px; color: var(--text-sec); margin-top: 3px; }
.topbar-spacer { flex: 1; }

.norm-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--green-light);
  color: var(--green-darker);
  border: 1px solid var(--green-container);
  border-radius: var(--radius-pill);
  padding: 7px 15px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: 12px;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-collapse-toggle {
  display: flex;
  width: 42px; height: 42px;
  border: 1px solid var(--border-strong);
  background: var(--card);
  border-radius: 12px;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .14s, color .14s;
}
.sidebar-collapse-toggle:hover { background: var(--green-soft); color: var(--green-darker); }

/* ── Área principal ─────────────────────────────────────── */
.main {
  padding: 30px 36px 80px;
  flex: 1;
  min-height: 0;
  width: 100%;
  max-width: 1280px;
  overflow-y: auto;
}

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--label);
}

.app-footer {
  margin-top: auto;
  padding: 20px 36px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--label);
  display: flex;
  align-items: center;
  gap: 8px;
}
.app-footer .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--border-strong); }

/* ── Iframe de herramienta ──────────────────────────────── */
.tool-frame-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  height: 100%;
}
.tool-frame {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
  background: #fff;
}

/* ── Herramienta abierta: ocupa toda la ventana, sin tarjeta ── */
.app-shell.tool-open .main {
  padding: 0;
  max-width: none;
}
.app-shell.tool-open .tool-frame-wrap {
  border: none;
  border-radius: 0;
  box-shadow: none;
}
.app-shell.tool-open .app-footer {
  display: none;
}
.app-shell.tool-open .topbar {
  padding: 8px 20px;
}
.app-shell.tool-open .topbar h1 {
  font-size: 15px;
}
.app-shell.tool-open .topbar-sub {
  display: none;
}
.app-shell.tool-open .menu-toggle,
.app-shell.tool-open .sidebar-collapse-toggle {
  width: 32px;
  height: 32px;
  font-size: 13px;
}
.app-shell.tool-open .norm-chip {
  padding: 4px 12px;
  font-size: 11px;
}