:root {
  --bg: #f4faf5;
  --bg-alt: #eaf3ec;
  --card: #ffffff;
  --card-hover: #f2f8f3;
  --border: #d7e6da;
  --verde: #3f8f57;
  --verde-light: #2e7245;
  --verde-dim: #e1f2e5;
  --text: #1b2b1f;
  --text-muted: #6b7d70;
  --danger: #c0392b;
  --warning: #b8790b;
  --radius: 12px;
  font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  min-height: 100vh;
}

a { color: var(--verde-light); }

.hidden { display: none !important; }

/* ---------- Login ---------- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 4px 24px rgba(27,43,31,0.06);
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand h1 { margin: 8px 0 0; font-size: 1.6rem; }
.login-brand p { margin: 4px 0 0; color: var(--text-muted); font-size: 0.9rem; }
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.85rem; color: var(--text-muted); }
.alert-error {
  background: #fdeceb;
  border: 1px solid var(--danger);
  color: #963226;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

input, select, textarea, button {
  font-family: inherit;
  font-size: 0.95rem;
}
input, select, textarea {
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 10px;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 1px solid var(--verde); }

.btn {
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 600;
}
.btn-primary { background: var(--verde); color: #ffffff; }
.btn-primary:hover { background: var(--verde-light); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--verde); color: var(--verde-light); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 10px; font-size: 0.82rem; }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 10px;
}
.icon-btn:hover { color: var(--verde-light); }

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-wrap: wrap;
  gap: 10px;
}
.topbar-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; }
.topbar-nav { display: flex; gap: 6px; }
.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
}
.tab-btn.active { background: var(--verde-dim); color: var(--verde-light); border-color: var(--verde); }
.topbar-user { display: flex; align-items: center; gap: 10px; position: relative; }
.user-name { color: var(--text-muted); font-size: 0.9rem; }
.dropdown {
  position: absolute;
  top: 36px;
  right: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 180px;
  box-shadow: 0 8px 24px rgba(27,43,31,0.14);
  overflow: hidden;
  z-index: 30;
}
.dropdown a, .dropdown button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  font-size: 0.9rem;
}
.dropdown a:hover, .dropdown button:hover { background: var(--card-hover); }

/* ---------- Main / filters ---------- */
.app-main { padding: 18px 20px 60px; max-width: 1000px; margin: 0 auto; }

.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 18px;
}
.filter-group { display: flex; flex-direction: column; gap: 4px; min-width: 120px; }
.filter-group label { font-size: 0.75rem; color: var(--text-muted); }
.btn-nueva { margin-left: auto; }

.empty-state { color: var(--text-muted); text-align: center; padding: 40px 0; }

/* ---------- Task cards ---------- */
.lista-contenedor { display: flex; flex-direction: column; gap: 10px; }
.tarea-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 1px 3px rgba(27,43,31,0.05);
}
.tarea-card.vencida { border-color: var(--danger); }
.tarea-card.completada { opacity: 0.75; }
.tarea-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; flex-wrap: wrap; }
.tarea-card-title { font-weight: 700; font-size: 1rem; }
.tarea-card-meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

.badge {
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 20px;
  font-weight: 700;
  white-space: nowrap;
}
.badge-periocidad { background: var(--verde-dim); color: var(--verde-light); }
.badge-dificultad-baja { background: #e6f6ea; color: #2e7245; }
.badge-dificultad-media { background: #fff3e0; color: #92610c; }
.badge-dificultad-alta { background: #fdeceb; color: #b23b2e; }
.badge-estado-pendiente { background: #eef1ee; color: #5b6d60; }
.badge-estado-en_progreso { background: #fff3e0; color: #92610c; }
.badge-estado-completada { background: #e6f6ea; color: #2e7245; }
.badge-estado-vencida { background: #fdeceb; color: #b23b2e; }

.tarea-card-row { font-size: 0.85rem; color: var(--text-muted); display: flex; gap: 14px; flex-wrap: wrap; }
.tarea-card-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }

.progress-bar { background: var(--bg-alt); border-radius: 20px; height: 8px; overflow: hidden; }
.progress-fill { background: var(--verde); height: 100%; border-radius: 20px; }

/* ---------- Calendar ---------- */
.calendario-header { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 14px; }
.calendario-header h2 { margin: 0; min-width: 200px; text-align: center; text-transform: capitalize; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow { text-align: center; font-size: 0.75rem; color: var(--text-muted); padding-bottom: 4px; }
.cal-day {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 64px;
  padding: 6px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.cal-day:hover { border-color: var(--verde); }
.cal-day.empty { background: transparent; border: none; cursor: default; }
.cal-day.today { border-color: var(--verde); border-width: 2px; }
.cal-day-num { font-size: 0.8rem; color: var(--text-muted); }
.cal-day-plants { display: flex; flex-wrap: wrap; gap: 2px; }
.cal-dia-detalle {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(27,43,31,0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
  padding: 16px;
}
.modal-content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 12px 40px rgba(27,43,31,0.18);
}
.modal-content h3 { margin-top: 0; }
.form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.form-row label { font-size: 0.8rem; color: var(--text-muted); }
.form-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px; }
.checkbox-group label { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text); }
.checkbox-group input { width: auto; }

/* ---------- Admin ---------- */
.admin-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 20px;
}
.admin-panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
.admin-table th { color: var(--text-muted); font-weight: 600; }

@media (max-width: 640px) {
  .app-main { padding: 14px 12px 60px; }
  .topbar { padding: 10px 12px; }
  .filters-bar { flex-direction: column; align-items: stretch; }
  .btn-nueva { margin-left: 0; }
  .cal-day { min-height: 48px; }
}